NO OCR TEXT NO OCR TEXT aileron servo seen has delib erately installed off-center help counter act weight side-mounted engine Top view stab/elevator showing brace wires terminals registration numbers /4-in Presto vinyl stick-ons desire build own airplane undi minished 1975 Brad began researching home-builder designs As research contacts home builders broadened found himself repeatedly turning good look landing gear mounting ar rangement along spreader bar Note wing strut -in brass mounts behind rear leg screwed l/ x -in spruce strip three-ply fairing holddown block exhaust pipes can seen close-up rudder/elevator assem bly shows -in brass mounts termi nals 030 music wire bottom brace pushrod exit slot rudder horn tail wheel assembly tail wheel homebrew assembly commercial unit appropriate size would serve just well Lark ideal projecta conservative de sign strongly built good performance low power easy fly Brad pur chased set plans went work contacted Ron Darcy help him through much construction process knowing weld en rolled night course community college started practicing scraps 26 Model Aviation Radio equipment stored away aTt ena bay Plans show exact location Author/designer Brad Shepherd Victoria TX Prime Time Only four months after its initial flight tests airplane took top honors October 1988 Scale Rally Austin TX real testament authors design skills craftsmanship piloting ability / Wheel pant installation showing radius pant inside face along two screws going through Sig wheel mount Exhaust stack fittings made -in brass strip high-temp soldered %-in brass tubing pipe engine ex haust other crankcase breather Aluminum-painted fairing witn *s pin heads screwheads closely simulates Polings full-scale Lark wing walk black Coverite Graphic roughed 180 grit no step dry-transfer lettering red striping Coverite Graphic stripes &RITO 65 4- TROK 3/&/4lflPk FIERGLA&Q \ \ - UTPLY Y4&Q&PAR N RPER TORRR N 94x3/8 QPRUCE S fl 8IIEET K \ Xz &HEET K \\\ \$7.iT2 6 7II 7/ ERGLR& CORE Left The right wing panel parts assembled glued up center section excess hasnt cut off yet Right left right panels being attached Note plywood plate over 1/8-in trailing edge rear spar spruce doubler -in sheet between spars Left The left wing tip showing -in WT-2 angle rib -in edge pieces glued 346-in WT-1 Follow plans discrepancy between drawing what see pictures Right fuselage sides being built over plans top other wax paper between best way assure two sides will identical resulting true fuselage assembled 4130 tubing time course completed ready start welding fuselage As quickly realized Brad thrown himself squarely uncompromising world big airplane construction No room Kelehers excellent plans gimmicky Mickey Mouse-type setups tubing sizes large home-built wing spar plenty beefy Brad put lust hellishly stout airplane Two other people deserve credit efforts assisting Brad progressed project A&P mechanic Jim Waiter kept him course lot little things dur ing Brads three-year stint companys headquarters Chicago good friend Larry Pennock made instruments work helped details did finish painting novel departure standard construc tion practice elimination rib stitching wing gluing 1 -in cap strips ribs gluing fabric caps After doping preliminary work including cowling metal parts finished Larry sprayed air craft Du Pont Centauri acrylic enamel turned out glossy Brad has never felt need rub out Since Larry Pinnock flying ex perience elected first flight honors Neither Larry nor Brad flown tail-dragger before both checked out first Super Cub Larry no problems Larks first flight pronounced aircraft real dandy Heres Brads panegyric after first flight Before off end runway Napa knew easy airplane fly Its very stable just outrageously easy handle Landing have such great visibility its hard get really out shape once youre ground rolls out beautifully Its twitchy Since sit centerline fuse lage can instantly detect drift crosswind correct before get trouble Its very very docile air plane During designing drawing build ing phases kept hoping upbeat words about full-scale Larks flight would carry through models charac teristics After six months drawing cut ting gluing fitting refitting redrawing etc finally have answer 28 Model Aviation sides pinned down over plans top view formers F4 F4B glued place along -in balsa gussets turtledeck formers temporarily pinned place will eventually moved shown plans during later phase construction good view showing downward angle sides fuselage being assembled COA3 LINE NOTE F-3A F39 8jITE FTO F 1/LITE PLY SHAPE AT COWL LINE r1IIIIII~ ~T/TGA TA NO NONE F1TFTF-OS3OS3~F NO'j11111111112111111111j12FRRALSA 33 SAD 10 RPL SOTJNEER 5301305ROT 50033025ROTI I25I J 3803/ ON 3/30 ALUMMOPE WM PlATES O EDT3532134A P NE NOflOM H M PLERTAOS ETRP 1/GRALSA S EPOXY WELL PA T8BALOA FOR BA TAT7i74I FE ADOB 32/ELITE PLY FOEBALSA/32NE________ -ROOT -TX P ALL DIAGONALS ARE 11051/0 FAR3/32 TSP ST IPWHEN BITLOING COBIN ON WINO i 05p{3TF-3RTWIU0321145 3 /T6ALUM TOEING POR RADIOS /CFT/BALSAFROM /TAO FINEROLASS 30905 BLOCK SEPT 0 3034313201343132GARDENCITY MI ART3SOIT/ATHEET II3AOFAF-SLIGHT I/O OGlEALLTOPFWTMER STRINGERS----3- ~ .--- -PH ATE STRAIGHTEDGE ALONOOMITTED FOR CLARITYpo--OUTMO 313FT1/A SLOT FOR FIN LA TSP OF FUSE WHEN FITONOFTIAI /I J\----\ ____-AL\ COWL--- IAA32SPRJCEIIAtLIAAT ADA 1341133 CF TM1I"IRLITEFLT- i 33AFLEMLOACTR I TFAR01430 T3F3I1 MTDEET3 3-332353 SUMORAODLU& OF OARLAR -I32433 I332ON-ZYEDMFATMLEI33/tj5 -- - - 33F 3D RRADRTSTOA3-OIMEN32ORIIRLITEPLT 0132FR----- SOARIR IS TSR SAnTA-IRISIM332DTBLFTSTRTT450800KAFMSRRAI MAKE CORRECTION IFIAO1INOAT1IOXT/0 ASEICIIRA/i32ONRLED3T- 3-T13 0t13231R13R001301 ATTACI ~ IRCOCSOSTORI -OCASISESOSFER iCOOCCO I135iCEAT 00033 \-13321 I UtOMOSS STRIP FIREGGLASS COWL &WHEELRRO3TS TAD FIREOGLASS[1fl 30925 RLSCK SEPTAEMARSIDN N TARSEN CITY ML0GT3OIAMNLSOSOENTI33030505BLAB KELEHER LARK K 2 SECTION OF LE PLACE NOEREBOIL MMAIODRS&EFOOT DEL SCALE -3T F a758 SOINPROLAREA-R FOR 00 OTSO POOR SIB ORE 3235 MMI343RDESIG13ED&DRAWNRY BRAS SHEPHERD DARED 0100Mi______________________________________ 323241013 ED43Dis32/33LFM Left Formers Fl 2 3 have inserted side panels glued place along maple engine mount stock slots top stringers former F-2 cut after formers place adjusted straightedge across top three tubing jutting out under engine mount stock attached tank will used smoke system installed later date Right side formers have installed along %2-in balsa sheeting 1/64-in plywood has wrapped around formers F-i F-2 glued place engine mount holes have drilled engine has temporarily installed order fit fiberglass cowl %2-in saddle strip wing opening glued place Note pine landing gear mounts showing through notches cut sides Left The wing has positioned bolted Polyethylene sheet has taped over wing %2-in top strip has pinned place Formers F3A F3B have positioned lined up straightedge before gluing stringers place gluing strip Balsa former F4T has clothespinned place Right Balsa sheet has glued over F3A F3B Former CF has beehi glued along strips F4T lAin sides doublers triangles have glued place %2-in cockpit floor installed Left The %-in balsa sheet has attached CF F4T Note curve transition turtledeck sides under canopy Right layer 1/4in balsa sheet has glued top CF F4T in balsa cap has glued over side assembly June 1988 15 years after Kelehers design truck necessary flight gear turned plane wind let idle first captivated prototype model wing struts bolted along moment always have butterflies Lark ready its maiden flight show prop some picture taking new creation first salutes skies After changing prop fired up 65 excitement wanting see fly June 23 1988 Steen Airstrip south Saito checked rpm began taxiing pretty much kept bay time Texas unloaded Lark pickup Going far end grass strip 430 pm throttled model up 30 Model Aviation EZE2 E3 SORTS/3/TRX 119 TEASELEVATOR1IBO1AlIAWITE -~iLiI- ----ITIRH ELEVATOR TIE BAR 3/3233/8 WEBI/S1/4 IU2SS~ [v32][b-1-10-1-10]]-AU- -------- 3/32/ R6 3/ 32 X 3/6 REAR LARLOOI sItTYR ARTHURACTUAL LAYOUTIUPR STRUT SJLEFT WING T/16 WEB r1-3/TR - r I-I-S4H~ HI 585II ---I- T. 3/16 T/2GU 10- APF--1— ___I------- ___-ijI SOSUT ATTACI4 1/40112 SPRUCE P51 1116 PUTREOHESARE RARLEARLLSHWTH 7RAIRRO 1/AO1/2 SPRUCE A0- ----A-II [v32][b-1-10-1-10]]A REAR SPAR 3/1653/B SPRUCE II 1553/6A 10I ACRE RAREI I1/5015/16 1 SET/RATIFY13/T/IRII/2FIIHR STRAIGHT GRAIN BALSAISLITS PLY 13/THYRIRS 3-ASRIBS 7-6-SI6*LA1~ET54 12EAU129 _CD 7-H CD ALL RIBS 1/B MES C GRAIN BBS 1-2RIBS 6-TO SHY HUT BIRCH PLo 2IEAUZIEG CDCD 1/2 RRTTERN FOB 5440W PROP 1/453/4 1/B SHIMS 2 p1501/2 SPRUCE WIT LIGHT 3/16-801/2 RIBST 7 EIN /jI 16-P W2HRHSRS RR W2T 364 1I AT ATS 250 NOTE rn SALESSE0 KELEHER LARK JK1B SB4GLE PLACE HOSREWIILT MODEL SCALE 3 T BIT/B IAHI IRHRSRHA BA I/B T/BXT/ 3/T601/8 RUDDER 21 401/21/ R-31/R p 3/16EASIDEHAR-S 1/B SHAH FLRTNS WITRRRELHSR TSHSAUIN PROLAREABLBGOZ FOR 60 TONG F STRORE DESIGNED DRAWN BE BRAD SHEPHERD 1/16 VEST WE 1/16 PIT 3/A 3/3203/B ALS Tsp 3/ 32 SHE E 1/801/2/ IHASTRRRHH SORWE 3/16X 3/805-T/2 SPRUCE 3i K 3/IMS TIP 1/16MW I/A S0SRRRU P65441 EDGE OF - 1/SOIIG RIGHT WING RITA GUSSET 3/3203/B WEBBING I7 1/4 / Left Starting rough shape cabin Section under canopy front soft block has fitted curved top sheet top layer -in sheet over CF F4T has roughed out Right Fitting marking canopy final shaping cabin section Left Trimming inside cabin section final shape Note outside has sanded smooth clean joint between cabin turtledeck Also note line fitting canopy Right good view transition turtledeck cabin accom plished careful sanding front F4T photo also shows horizontal stabilizer under left wing construction quite clearly Left Detailing cockpit area 3A6-in dowel tube roll bar has installed start procedure takeoff placard has glued after coating wood roll bar zinc chromate green floor flat black Brad Polings likeness waiting behind right wing Right instrument panel has finished front decking has painted blue 1Ao x -in balsa band simulating fiberglass bow over top instrument panel has installed chromated turtledeck has finished side sheeting com pleted stringers place 3A6-in landing gear fairing core attached landing gear pilot has detailed installed headed down strip playing rud der slightly keep true about 100 ft before touching up eleva tor Lark flying let climb out farther feeding little right aileron trim made 180 turn came back over field moving sticks check re sponse 1800 turn other end brought back Response good entered loop steady-running Saito allowed nice round figure 01 Dad getting elated pulled up 450 climb snapped Doing perfect imitation full-scale Lark would snap stopped wing horizontal still going up 450 After four-point roll vertical climb pushed out slowed stall nosed down about fl0 recovered throttled back got pattern Things going well tell myself get carried away have brain drain very first flight first landing too eager sticks slipped model little out form rocking back forth bounc ing around model flipped last bounce due overcontrolling elevator fortunately no damage except little scuffing canopy worked out better way second flight setting airplane up fairly long ap proach after base keeping low reduced power until crossed edge strip cutting throttle letting settle Dont try three-point landing like did first flight Bring model down its main gear let tail settle slows second flight executed number 32 Model Aviation Left Close-up showing 3A6-in brass tubing rear landing gear strut radius filed ready wrapping soldering Right Building fairing cover landing gear bottom formers F2B F2C have installed sheeted Polyethylene sheet has laid over landing gear attach area former F3C has attached 3/8-in sidepieces pinned ready 1/4-in sheet Left The %-in sheet fill-in between landing gear mounts has installed three-layer Lite Ply fairing mount has attached along bottom stringers Right bottom fairing has sanded round front angular back transitions along bottom Careful sanding shaping will result smooth scalelike appearance photos finished airplane clearly show touch-and-goes taught set model up landing properly second flight demonstrated right power weight Lark will whatever maneuvers pilot capable put through works three-turn spin immediate recovery release nose down about 600 coming out outside snap rolls loops inside snaps top rolls knife-edge flight outside loops slow flybyswith modeling buddy Leon Folse taking pictures heard voice behind propose inverted flyby immediate reaction guy nuts Ive got six months love labor flying around out wants take picture inverted pass second flight same guy egged flying Chips Model Aviation June 1981 inverted test flightand Chips Lark Pleading temporary insanity again gave Leons reckless request got picture want fine-looking quarter-scale model has lot character wont bust budget wont require van trans port good flier look over plans consider Lark Its difficult model build final results wont disappoint Itll major contender Sport Scale Giant Scale contest may want enter youll still have July 1989 33 plywood formers foam block carved shape coat epoxy before applying fiberglass over off cowl lot effort expense recommended because quality cowl along strong 040 butyrate can opy wheel pants now available Tom Keeling T&D Fiberglass Specialties completed model its bare bones stage just prior covering As can seen f ished structure appears very strong airplane capable withstanding heavy use Leader Small Airfoil Technology MAStER AIRSCREW four series choose Master Airscrew offers full line propellers flying application made tough glass-filled nylon superior strength durability G/F SERIES Designed sport flyer G/F Series available 28 popular sizes 5-11 diameters K SERIES K Series designed 4 2 stroke applications Wide undercambered blades provide greater thrust slower turning 4 strokes 8 sizes including new 12 x 8 15 x 10 tips painted safety ANTIQUE SERIES performance series features scimitar shape swept back tips plenty undercamber s suitable application Sizes 12 x 6 13 x 6 14 x 7 16 x 7 new 10 x 5 11 x 6 gold glass-filled nylon 12 x 8 15 x 12 foldIng propellers geared systems 8 selffeathering adjustable pitch prop 05 direct drive give improved thrust glide less drag fixed blade props See Hobby Dealer MASTER AIRSCREW propellers accessories Windsor Propeller Company 384 Tesconi Court Santa Rosa CA 95401 great-looking model super weekend fly ing Construction Wing assure accuracy assem bling wing panels cut out set mas ter ribs /32 ply Mark rib its position panel after its cut out pre clude chance error building Pin piece A-in-sq balsa jig line shown Place 3/6-in shims under front bottom spar pin A-in-sq spar shims Cut small 900 triangle /32 ply use keep ribs vertical install ing spar Install top A-in sq spar pinning place after ribs have pinned A-in-sq jig bottom spar Install /8 x 1 /2-in trailing edge slots ribs satis fied assembly square straight use cyanoacrylate CyA glue joints Gap-filling CyA such Super Jet glue choice takes care irregularities introduced cutting out ribs Install glue %2 x 3A-in aileron spar cap place Pin /8 x %-in leading edge glue place Slide rear 46 x %-in spruce spar place glue Refer picture panel being assembled Cut out %2 x %-in diagonals glue place between ribs Glue /6 vertical-sheet webbing both sides spars Install -in gussets cor ners Sand bevel A-in leading edge conform ribs glue %2in leading edge sheeting place Turn panel over remove shims pin down jig ribs meet board stall leading edge sheeting aileron spar cap both panels have completed lay flat surface have drawn straight line over 70 long use piece Celotex job Pin panels down bottom spar along drawn line Use aliphatic resin epoxy glue rear spar spruce joiner spar stubs Clamp clothespins until dry Glue /8 x 1 in Lite Ply trailing edge joiner top trailing edges Glue x 7A x 6/2-in spar joiner tween main spars Epoxy x 1% x 6in ply joiner rear spars center section Glue x %-in leading edge halves together Glue %2 sheeting top center section aft spars Remove wing bench Glue aileron cranks place crank mounted Install V16 music wire pushrods Sheet bottom center section Note offset position aileron servo help ful counteracting weight sidemounted engine unnecessary twin cylinder Sand front leading edge sheeting flush /8 x 3A-in lead ing edge glue /8 x -in cap place Razor plane course-sand lead ing edge rounded shape Cut tips 3/6-in lightweight sheet balsa using WT- 1 rib outline Cut 34 Model Aviation ELECTRIC SERIES HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP WT-2 rib %-in sheet two WT-3 WT-4 lightweight -in sheet Glue WT-2 place shown glue tip WT- 1 position bot tom edge lining up bottom A-in leading edge bottom trailing edge rib No 10 Note photo tip parts assembled wing Disregard WT-5 piece photo using two pieces WT-4 instead per plan Sand WT-3 pieces conform No 10 rib glue Y32in tip sheeting place Sand tip rounded shape per cross section dia gram WT-2 Build ailerons directly over plans after installing ribs onto /8 x 1-in trailing edge lining up Tail surfaces Cut outlines shape glu ing x -in spars together make /2-in sandwich method construc tion reduces chance warped spars caused using solid -in piece Notch spars assemble surfaces over plans sandwich-type construction elevator rudder results very strong lightweight structure appears realistic covered Install hinges finished fuselage built using one-side-ontop-of-the-other routine After Lite Ply doubler A-in balsa sides have cut out glued together insert waxed paper between sides build directly over plan Dont forget gluing up ply balsa forward side pieces have both right side left Con tact cement used pieces prototype CyA applied around edges Separate sides finished pin down over top view former F-4 tail post Trial fit F-4 trim needed Check fit F4-B sand angle bottom snug fit F-4 Cut temporary angles scrap balsa pin place behind F-4 loca tion Epoxy F-4 place epoxy F4-B top F-4 positioned against gles Use 900 angle get tail post square glue sides together Cut aft fuselage crosspieces place over plan noting difference width top bottom shown photos plans Again discrepan cies show up between photos plans always follow plans reflect changes made after photos taken Glue /8 x -in diagonals place shown top view Pin F-5 F-6 position trial fit stringers straightness Pin F-7 place trial fit /6 x 3A-in top longerons Trim form ers necessary good fit Glue stringers formers longerons place Place F-i slots sides pull sides together using rubberband lock F-t Slide former F-3 place pinning bottom sides securely will pull meet F-3 firmly youre satisfied fit DWBRO TRIPSPIN KEEPS YOU IN Quick easy assemble Universal Designed balance items listed above special accessories Strong stable durable balancing wheels recessed prevent damage accidently dropped Du-Bros Tm- Spin prop balancer adjustable vertically horizontally conform balancing need Truly precision instrument built modelers expect very best Available now local hobby shop BALANCES AIRPLANE PROPSALL SIZES JET FANS BOAT PROPS HELICOPTER ROTOR HEADS SPINNERS CAR WHEELS AND MOTOR GEARS DU-BRO PRODUCTS INC 480 Bonner Road onda IL 60084 July 1989 35 BALANCE Specially designed locking cone securely centers locks props onto balancing shaft utmost accuracy PRECISION MODEL PRODUCTS pa USA BARSTOCK ALUMINUM SPINNERS Pan NoSize TI-iSO-B 112 TT-175-8 /4 TT-200-B 11-225-B .. 2-1/4 11-226-B 1/4 FAt 11-250-B .. 2-1/2 11-251-B .. 2-1/2FAI 75-B 3/4 11-276-B 3/4 FAI .. 11-300-B 11-301-B FAll 11-325-B -1/4 11-350-B -1/2 11-375-B /4 00-B 4 RetailApprox PriceWeight $1395058 oz 1495095oz 1595100oz 1695160oz 1895150ez 1895190oz 2095170oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz S99S520 oz 6995S70 oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner Part NoSize 11-140-A .1/4-28 11-147-A 1/4-28/7mm 11-610-A6 x 1 0mm 11-710-A-7 x 1 0mm 11-516-A5/16-24 11-516-A5/16-24/8mm 11-810-A8x 10mm 11-825-A8x 125mm 11-375-A3/8-24 11-125-AlOx 125mm RetailApprox PriceWeight S495 . 061 oz 495 . z 495 . 063 oz 495 . oz 4950 76 oz 495076oz 495076oz 495075oz 595117oz 595115ox 3 Pieces Nut Washer aird Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 squareness epoxy F-3 position Glue A-in Lite Ply fuel tank base former F-2 keeping 900 former Check fit maple engine mounts through F-i F-2 F-3 choose use firewall commercial mount omit cut outs formers keep same center lines installing mount F- 1 Remove F-l F-2 structure Install fuel tank base former F2 Position F-2 slots pull sides gether rubberband install F-i slots Install engine mount pieces through holes epoxy formers maple stock Use CyA hold tank place silicone can used later final tank installation Stuff piece foam around fuel tank tubing outlet hole F1 epoxy seal off fuel-proof firewall smoker tank installed proto type future use Disregard photos showing tank tubing outlets unless also want include model Re move fuselage structure plans Glue A-in-sq spruce slots top formers F- 1 F-2 F-3 Lay / x A-in stringers place over F-i F-3 cut slots F-2 receive glue place Note photo stringers installed Glue F2-S F35 F3B-S sides Glue -in pine landing gear mounts place us ing liberal amounts epoxy Cut 4, ply sheeting over F-i F-2 using pattern plans Note grain make easier wrap around formers photos shows sheet ing place %2 balsa sheeting being installed behind ply Glue spruce cowl hold-down blocks place flush ply against F-2 Glue %2-in wing saddle strips place Glue FB Lite Ply pieces doublers F-3 Glue % x 3A-in maple blocks wing hold-downs FB F3 using epoxy Epoxy WM Lite Ply pieces fuselage % x 3A-in ma ple block underneath Place wing saddle pin place temporarily lining up trailing edge center centerline former F4B Square wing fuselage mea suring tail post No 10 rib trailing edge Pin firmly drill rear hold-down bolt hole using Y6-in bit Re move wing drill enlarge Y16-in hole wing trailing edge in Tap maple block 4-20 threads Reinstall wing bolt down trail ing edge Square wing again pin firmly Drill front hole fit piece Y16-in dowel Drill matching hole remove wing enlarge both wing holes 14 tap maple blocks /4 -20 Bolt wing place lay sheet polyethylene over wing center section shown photo Again referring photos pin top %2-in balsa strips place wing between F-3 F4-B Pin F3-A place checking fit against F3 Pin F3-B place checking fit straightedge F3-B forward F-2 ensure continuity top sheeting Sand trim necessary Install A-in-sq top balsa stringer two side / x A-in stringers shown photos Cut off rear portion top cabin strip F3-B F-4 Cut cabin cockpit sides lightweight -in sheet balsa using outline side view plan former F3-B CF Cut front rear h-in sheet doublers lightweight stock using cabin side pattern Glue place making right left side Glue lightweight 34-in trian gle stock top edge sides re ferring photos Draw lines polyethylene sheet former F3-B F4-B felt-tip pen Pin sides lines pin former CF back sides Place F4T against F4-B holding clothespin temporarily shown photo Glue two pieces / x 3A-in stock between CF F4-T two A-in pieces substi tuted single A-in piece glue line can used reference point shaping cabin area Glue sides CF F3-B Glue %-in side sheet between CF F4-T wetting wood fit curve neces sary Glue A-in sheet doubler side sheet Glue x 1-in cap top side Glue two-piece A-in sheet top CF aft F4-T per photo Glue %2-in sheet cabin floor place checking fits well sides Glue 34 x 1 /2-in soft block piece sides front F3-B sanding insides fit curve sheeting Rough cut exterior sides using pattern shown plans Refer photo showing desired shape soft block front Rough sand bumps out cabin area sides taking care dig wing sheeting Sheet sides F4-B aft tail post Remove cabin area polyethy lene sheet plan Make cutouts F3-A hold-down blocks lo cated Epoxy maple blocks F-3 epoxy piece /e-in Lite Ply inside %2in side sheeting blocks meet Drill through sheet blocks tap latter 4-40 bolts Enlarge hole side sheet 4-40 bolt well Glue -in top sheet turtleback place glue ply hold-down plate A-in dowel top cabin sheet Drill through dowel ply enlarge ply hole insert blind nut Screw cabin structure onto fuselage assembly Fair cabin areas side sheeting using 180-grit paper little patience careful sanding will make nice smooth transition turtle hump cabin area Place canopy over cabin structure trimming good fit along glue line Mark canopy outline pen carve inside area about A-in thickness sharp knife finish sandpaper hardest part building 36 Model Aviation PROP NUT ADAPTORS V model finished can now take fun break doll up cockpit floor painted flat black sides green zinc chromate color headache rack built using piece 3A6-in alumi num tubing top radius 346-in doweling painted zinc chromate re mainder instrument panel painted almond color shown detail color photos Mask off paint sheeting over front cockpit same blue will used final exterior finish prototype used Red Devil polyurethane Empire Blue Sigs Blue Sky Bright also close color Polings full-scale Lark simulate fiberglass band fullsize plane piece 46-thick %-in wide balsa laid across top curved glued ends painted chromate Williams 3-in-scale sport pilot used dressed up piece balsa block glued bottom shaped raise pilot proper height parachute painted red match red shoelaces used straps shoulder straps black shoelaces Starting Before Takeoff placard shown photo finished cockpit glued wall before gluing canopy canopy tinted hot water black Rit dye careful make too dark Swish canopy around large roasting pan little remove rinse cold water isnt dark enough repeat process until youre satis fied full-scale Lark has just sugges tion tint canopy prototype glued Testors cement green tube variety Any similar model ce ment should work just well Mask off canopy above paint line protect Finishing fuselage Install string ers glue F3-C F2-B F2-C place sheet section i/ x -in spruce strips may glued pine landing gear blocks Install /8-in sheet between blocks fill-in File 346-in brasstubing enclose main landing gear wire wrap soft wire shown plan photo Place gear slots pine blocks holding place screwing three -in brass strips leg using commercial straps Build cover over gear per photos plans Glue three-ply hold block 1A-in sheet balsa fill-in Drill down through fairing block tap block 4-40 bolt Screw fairing place sand ing fit F2-C F3-C formers photos shows foam form shaping cowling using one-off meth od Believe folks aint worth considering cost foam boat glass epoxy hours sanding filling cutting holes etc T&D Fiberglass Specialties fers ready-to-finish cowl sample Tom Keeling sent fit fuselage per fectly would highly recommend purchas ing cowl wheel pants canopy Tom T&D canopy formed 040 material beaut requiring slight trimming perfect fit tried mold canopy 15 times before finally giv ing up easier cover tail surfaces before installing fuselage Sig Koverall nitrate dope used model excellent results After bolting wing slip stabi lizer place ensuring its square trailing edge wing level wing Make certain stabilizer true before gluing place Slip el evator used Klett pinpoint hinges secur ing aliphatic resin Install fin its slot squaring tail post us ing 900 angles side assure square ness stab Make up tail wheel assembly glue place use commercial assemblies securing ply plate epoxied fuselage bottom Install rudder glue hinges prototype given two coats ni trate dope wherever Koverall met structurethat ribs leading edge sheet tips trailing edge fuselage stringers front sheeting turtledeck sheeting Af ter sanding 220-grit paper Koverall installed brushing nitrate through material contact points iron set medium heat beauty taut covering immediately apparent magic Thats uppers building stick-and-rag models Five coats thinned nitrate brushed entire model coat thinned nitrate mixed talcum powder pure kind starch applied sanded smooth 220 Tri-M-ite followed three coats ni trate sanded 360-grit paper Finally sprayed polyurethane mist coat fol lowed fairly wet doubt could have applied red stripes Coverites Graphic Stripes 6-in sizes right mark scale appearance red ex actly matches color full-scale plane stripes joy apply eliminate masking spraying would otherwise required Theyre no thicker coat paint have beau tiful gloss Prime Time lettering Polings name hand painted 0-size long haired sable brush using Sig Skybright Yel low bottom half mixing red create orange top half reg istration numbers letters -in Hel vetica No 411 Presto Stik Vinyl letters found office supply stores Use 030-in music wire wire brac ing tail feathers %-in length %2in brass tubing flattened end drilled hole soldered wire No 2 screws used hold brac ing through holes drilled hardwood mounts ply reinforcements stab fin No 32 straight pins Sig se cured aliphatic resin used sheeted parts simulate Dzuz fasteners PK screws driven metal Continued page 141 New Rocket Uses B C andD Engines. Capability No Else Offers MRC s recent introduction 25 Moonbiaster inter mediate kit brings yet another technological advance MRCs Computer Aided Designs CAD built carry B4-2 C6-3 engines However Moonbiaster also commercially sold rocket kit includes easy-touse adapter also allows louse powerful Dengines Builtto take blast Moon blaster features large die-cut balsa fins blowmolded nose cone superb space capsule detailing Self stick decals 18chute Send free catalog See full line advanced MRC rockets hobby dealer cant help callus directly MRCe Model Rectifier Corporation 2500 Woodbridge Ave Edison NJ 08817 201 985-7800 July 1989 37 Safety/Preston Continued page 20 types animals including birds Nobody can predict time hot spots 1989 season will since known hot spots close us would wise outdoor modelers know something about disease what to avoid what symptoms aware First avoidance cant avoid encounter ing ticks small over place pet owners know However ob serving few precautions can keep ing bitten and/or infected Actions will keep ticks off skin effective preventa tive measures Ticks dwell low shrubbery grass blades get onto shoes kles lower legs crawl upward Wear long pants cinched ankle tucked socks boots less access skin bet ter Check clothing frequently especially youve through field brush retriev ing downed airplane Wearing light-colored clothing makes easier spot little devils Repellents containing Deet can used effec tively clothing shoes pants socks di rect application high concentrations skin advised new product Permanone available may effective Applied clothing both repels kills ticks After day field check feet kles legs attached ticks tick nymphs about size pinhead feeding Any find should removed imme diately fine curved-tip tweezer Grasp tick close possible its mouth part sticking skin pull outward firmly jerking Alternate methods tick re moval alcohol heat vaseline etc popular past have shown less effective good removal fast removal less chance infection Immediately after removing tick disinfect bite rubbing alcohol betadine Unfortunately victims never see tick infects symptoms Lyme dis ease include various types rash may de velop weeks after infection fatigue stiff neck flu-like symptoms headache chills fever muscle aches arthritislike symptoms difficult disease victims recognize doctor diagnose pattern symp toms varies widely case case symptoms mimic other illnesses See doctor symptoms lead suspect have disease Early treatment effec tive Untreated disease progressive can become serious its advanced stages Jesse also sent copy article Lyme disease appeared Consumer Reports June 1988 pages 382-385 Another article disease can found March 1 1989 sue American Nurseryman feature article article states New York Medical College investigating connec tion between Lyme disease multiple sclerosis MS both have similar symptoms alert ticks have safe month Lark/Shepherd Continued page 37 Brads plane scimitar show prop carved piece 2 x 12-in white pine shelving material covered multi ple coats nitrate high-gloss finish painted same white used model Designing building beguiling air plane very satisfying enjoyable Though problems cropped up solving could frustrating times playing Daedelus definitely worth too can have quarter-scale model beauti ful home-builtand fly off work bench instead drawing board Whats wont need cargo van carry flying fieldor contest site En joy building flying unique little Lark Radio Technique/Myers Continued page 41 5 A-in disk Microsoft 9 Sector format usable IBM PCs compatibles Other formats may available need Ask WIMP will ASCII accompanied handbook will have some hints conver sions other computers files disk RC Slope Soaring/Triebes Continued page 47 instant perfection successful flight landing hinting promise things come knew what next couple hand tosses Continued page 144 July 1989 141
Edition: Model Aviation - 1989/07
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 141
Edition: Model Aviation - 1989/07
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 141
NO OCR TEXT NO OCR TEXT aileron servo seen has delib erately installed off-center help counter act weight side-mounted engine Top view stab/elevator showing brace wires terminals registration numbers /4-in Presto vinyl stick-ons desire build own airplane undi minished 1975 Brad began researching home-builder designs As research contacts home builders broadened found himself repeatedly turning good look landing gear mounting ar rangement along spreader bar Note wing strut -in brass mounts behind rear leg screwed l/ x -in spruce strip three-ply fairing holddown block exhaust pipes can seen close-up rudder/elevator assem bly shows -in brass mounts termi nals 030 music wire bottom brace pushrod exit slot rudder horn tail wheel assembly tail wheel homebrew assembly commercial unit appropriate size would serve just well Lark ideal projecta conservative de sign strongly built good performance low power easy fly Brad pur chased set plans went work contacted Ron Darcy help him through much construction process knowing weld en rolled night course community college started practicing scraps 26 Model Aviation Radio equipment stored away aTt ena bay Plans show exact location Author/designer Brad Shepherd Victoria TX Prime Time Only four months after its initial flight tests airplane took top honors October 1988 Scale Rally Austin TX real testament authors design skills craftsmanship piloting ability / Wheel pant installation showing radius pant inside face along two screws going through Sig wheel mount Exhaust stack fittings made -in brass strip high-temp soldered %-in brass tubing pipe engine ex haust other crankcase breather Aluminum-painted fairing witn *s pin heads screwheads closely simulates Polings full-scale Lark wing walk black Coverite Graphic roughed 180 grit no step dry-transfer lettering red striping Coverite Graphic stripes &RITO 65 4- TROK 3/&/4lflPk FIERGLA&Q \ \ - UTPLY Y4&Q&PAR N RPER TORRR N 94x3/8 QPRUCE S fl 8IIEET K \ Xz &HEET K \\\ \$7.iT2 6 7II 7/ ERGLR& CORE Left The right wing panel parts assembled glued up center section excess hasnt cut off yet Right left right panels being attached Note plywood plate over 1/8-in trailing edge rear spar spruce doubler -in sheet between spars Left The left wing tip showing -in WT-2 angle rib -in edge pieces glued 346-in WT-1 Follow plans discrepancy between drawing what see pictures Right fuselage sides being built over plans top other wax paper between best way assure two sides will identical resulting true fuselage assembled 4130 tubing time course completed ready start welding fuselage As quickly realized Brad thrown himself squarely uncompromising world big airplane construction No room Kelehers excellent plans gimmicky Mickey Mouse-type setups tubing sizes large home-built wing spar plenty beefy Brad put lust hellishly stout airplane Two other people deserve credit efforts assisting Brad progressed project A&P mechanic Jim Waiter kept him course lot little things dur ing Brads three-year stint companys headquarters Chicago good friend Larry Pennock made instruments work helped details did finish painting novel departure standard construc tion practice elimination rib stitching wing gluing 1 -in cap strips ribs gluing fabric caps After doping preliminary work including cowling metal parts finished Larry sprayed air craft Du Pont Centauri acrylic enamel turned out glossy Brad has never felt need rub out Since Larry Pinnock flying ex perience elected first flight honors Neither Larry nor Brad flown tail-dragger before both checked out first Super Cub Larry no problems Larks first flight pronounced aircraft real dandy Heres Brads panegyric after first flight Before off end runway Napa knew easy airplane fly Its very stable just outrageously easy handle Landing have such great visibility its hard get really out shape once youre ground rolls out beautifully Its twitchy Since sit centerline fuse lage can instantly detect drift crosswind correct before get trouble Its very very docile air plane During designing drawing build ing phases kept hoping upbeat words about full-scale Larks flight would carry through models charac teristics After six months drawing cut ting gluing fitting refitting redrawing etc finally have answer 28 Model Aviation sides pinned down over plans top view formers F4 F4B glued place along -in balsa gussets turtledeck formers temporarily pinned place will eventually moved shown plans during later phase construction good view showing downward angle sides fuselage being assembled COA3 LINE NOTE F-3A F39 8jITE FTO F 1/LITE PLY SHAPE AT COWL LINE r1IIIIII~ ~T/TGA TA NO NONE F1TFTF-OS3OS3~F NO'j11111111112111111111j12FRRALSA 33 SAD 10 RPL SOTJNEER 5301305ROT 50033025ROTI I25I J 3803/ ON 3/30 ALUMMOPE WM PlATES O EDT3532134A P NE NOflOM H M PLERTAOS ETRP 1/GRALSA S EPOXY WELL PA T8BALOA FOR BA TAT7i74I FE ADOB 32/ELITE PLY FOEBALSA/32NE________ -ROOT -TX P ALL DIAGONALS ARE 11051/0 FAR3/32 TSP ST IPWHEN BITLOING COBIN ON WINO i 05p{3TF-3RTWIU0321145 3 /T6ALUM TOEING POR RADIOS /CFT/BALSAFROM /TAO FINEROLASS 30905 BLOCK SEPT 0 3034313201343132GARDENCITY MI ART3SOIT/ATHEET II3AOFAF-SLIGHT I/O OGlEALLTOPFWTMER STRINGERS----3- ~ .--- -PH ATE STRAIGHTEDGE ALONOOMITTED FOR CLARITYpo--OUTMO 313FT1/A SLOT FOR FIN LA TSP OF FUSE WHEN FITONOFTIAI /I J\----\ ____-AL\ COWL--- IAA32SPRJCEIIAtLIAAT ADA 1341133 CF TM1I"IRLITEFLT- i 33AFLEMLOACTR I TFAR01430 T3F3I1 MTDEET3 3-332353 SUMORAODLU& OF OARLAR -I32433 I332ON-ZYEDMFATMLEI33/tj5 -- - - 33F 3D RRADRTSTOA3-OIMEN32ORIIRLITEPLT 0132FR----- SOARIR IS TSR SAnTA-IRISIM332DTBLFTSTRTT450800KAFMSRRAI MAKE CORRECTION IFIAO1INOAT1IOXT/0 ASEICIIRA/i32ONRLED3T- 3-T13 0t13231R13R001301 ATTACI ~ IRCOCSOSTORI -OCASISESOSFER iCOOCCO I135iCEAT 00033 \-13321 I UtOMOSS STRIP FIREGGLASS COWL &WHEELRRO3TS TAD FIREOGLASS[1fl 30925 RLSCK SEPTAEMARSIDN N TARSEN CITY ML0GT3OIAMNLSOSOENTI33030505BLAB KELEHER LARK K 2 SECTION OF LE PLACE NOEREBOIL MMAIODRS&EFOOT DEL SCALE -3T F a758 SOINPROLAREA-R FOR 00 OTSO POOR SIB ORE 3235 MMI343RDESIG13ED&DRAWNRY BRAS SHEPHERD DARED 0100Mi______________________________________ 323241013 ED43Dis32/33LFM Left Formers Fl 2 3 have inserted side panels glued place along maple engine mount stock slots top stringers former F-2 cut after formers place adjusted straightedge across top three tubing jutting out under engine mount stock attached tank will used smoke system installed later date Right side formers have installed along %2-in balsa sheeting 1/64-in plywood has wrapped around formers F-i F-2 glued place engine mount holes have drilled engine has temporarily installed order fit fiberglass cowl %2-in saddle strip wing opening glued place Note pine landing gear mounts showing through notches cut sides Left The wing has positioned bolted Polyethylene sheet has taped over wing %2-in top strip has pinned place Formers F3A F3B have positioned lined up straightedge before gluing stringers place gluing strip Balsa former F4T has clothespinned place Right Balsa sheet has glued over F3A F3B Former CF has beehi glued along strips F4T lAin sides doublers triangles have glued place %2-in cockpit floor installed Left The %-in balsa sheet has attached CF F4T Note curve transition turtledeck sides under canopy Right layer 1/4in balsa sheet has glued top CF F4T in balsa cap has glued over side assembly June 1988 15 years after Kelehers design truck necessary flight gear turned plane wind let idle first captivated prototype model wing struts bolted along moment always have butterflies Lark ready its maiden flight show prop some picture taking new creation first salutes skies After changing prop fired up 65 excitement wanting see fly June 23 1988 Steen Airstrip south Saito checked rpm began taxiing pretty much kept bay time Texas unloaded Lark pickup Going far end grass strip 430 pm throttled model up 30 Model Aviation EZE2 E3 SORTS/3/TRX 119 TEASELEVATOR1IBO1AlIAWITE -~iLiI- ----ITIRH ELEVATOR TIE BAR 3/3233/8 WEBI/S1/4 IU2SS~ [v32][b-1-10-1-10]]-AU- -------- 3/32/ R6 3/ 32 X 3/6 REAR LARLOOI sItTYR ARTHURACTUAL LAYOUTIUPR STRUT SJLEFT WING T/16 WEB r1-3/TR - r I-I-S4H~ HI 585II ---I- T. 3/16 T/2GU 10- APF--1— ___I------- ___-ijI SOSUT ATTACI4 1/40112 SPRUCE P51 1116 PUTREOHESARE RARLEARLLSHWTH 7RAIRRO 1/AO1/2 SPRUCE A0- ----A-II [v32][b-1-10-1-10]]A REAR SPAR 3/1653/B SPRUCE II 1553/6A 10I ACRE RAREI I1/5015/16 1 SET/RATIFY13/T/IRII/2FIIHR STRAIGHT GRAIN BALSAISLITS PLY 13/THYRIRS 3-ASRIBS 7-6-SI6*LA1~ET54 12EAU129 _CD 7-H CD ALL RIBS 1/B MES C GRAIN BBS 1-2RIBS 6-TO SHY HUT BIRCH PLo 2IEAUZIEG CDCD 1/2 RRTTERN FOB 5440W PROP 1/453/4 1/B SHIMS 2 p1501/2 SPRUCE WIT LIGHT 3/16-801/2 RIBST 7 EIN /jI 16-P W2HRHSRS RR W2T 364 1I AT ATS 250 NOTE rn SALESSE0 KELEHER LARK JK1B SB4GLE PLACE HOSREWIILT MODEL SCALE 3 T BIT/B IAHI IRHRSRHA BA I/B T/BXT/ 3/T601/8 RUDDER 21 401/21/ R-31/R p 3/16EASIDEHAR-S 1/B SHAH FLRTNS WITRRRELHSR TSHSAUIN PROLAREABLBGOZ FOR 60 TONG F STRORE DESIGNED DRAWN BE BRAD SHEPHERD 1/16 VEST WE 1/16 PIT 3/A 3/3203/B ALS Tsp 3/ 32 SHE E 1/801/2/ IHASTRRRHH SORWE 3/16X 3/805-T/2 SPRUCE 3i K 3/IMS TIP 1/16MW I/A S0SRRRU P65441 EDGE OF - 1/SOIIG RIGHT WING RITA GUSSET 3/3203/B WEBBING I7 1/4 / Left Starting rough shape cabin Section under canopy front soft block has fitted curved top sheet top layer -in sheet over CF F4T has roughed out Right Fitting marking canopy final shaping cabin section Left Trimming inside cabin section final shape Note outside has sanded smooth clean joint between cabin turtledeck Also note line fitting canopy Right good view transition turtledeck cabin accom plished careful sanding front F4T photo also shows horizontal stabilizer under left wing construction quite clearly Left Detailing cockpit area 3A6-in dowel tube roll bar has installed start procedure takeoff placard has glued after coating wood roll bar zinc chromate green floor flat black Brad Polings likeness waiting behind right wing Right instrument panel has finished front decking has painted blue 1Ao x -in balsa band simulating fiberglass bow over top instrument panel has installed chromated turtledeck has finished side sheeting com pleted stringers place 3A6-in landing gear fairing core attached landing gear pilot has detailed installed headed down strip playing rud der slightly keep true about 100 ft before touching up eleva tor Lark flying let climb out farther feeding little right aileron trim made 180 turn came back over field moving sticks check re sponse 1800 turn other end brought back Response good entered loop steady-running Saito allowed nice round figure 01 Dad getting elated pulled up 450 climb snapped Doing perfect imitation full-scale Lark would snap stopped wing horizontal still going up 450 After four-point roll vertical climb pushed out slowed stall nosed down about fl0 recovered throttled back got pattern Things going well tell myself get carried away have brain drain very first flight first landing too eager sticks slipped model little out form rocking back forth bounc ing around model flipped last bounce due overcontrolling elevator fortunately no damage except little scuffing canopy worked out better way second flight setting airplane up fairly long ap proach after base keeping low reduced power until crossed edge strip cutting throttle letting settle Dont try three-point landing like did first flight Bring model down its main gear let tail settle slows second flight executed number 32 Model Aviation Left Close-up showing 3A6-in brass tubing rear landing gear strut radius filed ready wrapping soldering Right Building fairing cover landing gear bottom formers F2B F2C have installed sheeted Polyethylene sheet has laid over landing gear attach area former F3C has attached 3/8-in sidepieces pinned ready 1/4-in sheet Left The %-in sheet fill-in between landing gear mounts has installed three-layer Lite Ply fairing mount has attached along bottom stringers Right bottom fairing has sanded round front angular back transitions along bottom Careful sanding shaping will result smooth scalelike appearance photos finished airplane clearly show touch-and-goes taught set model up landing properly second flight demonstrated right power weight Lark will whatever maneuvers pilot capable put through works three-turn spin immediate recovery release nose down about 600 coming out outside snap rolls loops inside snaps top rolls knife-edge flight outside loops slow flybyswith modeling buddy Leon Folse taking pictures heard voice behind propose inverted flyby immediate reaction guy nuts Ive got six months love labor flying around out wants take picture inverted pass second flight same guy egged flying Chips Model Aviation June 1981 inverted test flightand Chips Lark Pleading temporary insanity again gave Leons reckless request got picture want fine-looking quarter-scale model has lot character wont bust budget wont require van trans port good flier look over plans consider Lark Its difficult model build final results wont disappoint Itll major contender Sport Scale Giant Scale contest may want enter youll still have July 1989 33 plywood formers foam block carved shape coat epoxy before applying fiberglass over off cowl lot effort expense recommended because quality cowl along strong 040 butyrate can opy wheel pants now available Tom Keeling T&D Fiberglass Specialties completed model its bare bones stage just prior covering As can seen f ished structure appears very strong airplane capable withstanding heavy use Leader Small Airfoil Technology MAStER AIRSCREW four series choose Master Airscrew offers full line propellers flying application made tough glass-filled nylon superior strength durability G/F SERIES Designed sport flyer G/F Series available 28 popular sizes 5-11 diameters K SERIES K Series designed 4 2 stroke applications Wide undercambered blades provide greater thrust slower turning 4 strokes 8 sizes including new 12 x 8 15 x 10 tips painted safety ANTIQUE SERIES performance series features scimitar shape swept back tips plenty undercamber s suitable application Sizes 12 x 6 13 x 6 14 x 7 16 x 7 new 10 x 5 11 x 6 gold glass-filled nylon 12 x 8 15 x 12 foldIng propellers geared systems 8 selffeathering adjustable pitch prop 05 direct drive give improved thrust glide less drag fixed blade props See Hobby Dealer MASTER AIRSCREW propellers accessories Windsor Propeller Company 384 Tesconi Court Santa Rosa CA 95401 great-looking model super weekend fly ing Construction Wing assure accuracy assem bling wing panels cut out set mas ter ribs /32 ply Mark rib its position panel after its cut out pre clude chance error building Pin piece A-in-sq balsa jig line shown Place 3/6-in shims under front bottom spar pin A-in-sq spar shims Cut small 900 triangle /32 ply use keep ribs vertical install ing spar Install top A-in sq spar pinning place after ribs have pinned A-in-sq jig bottom spar Install /8 x 1 /2-in trailing edge slots ribs satis fied assembly square straight use cyanoacrylate CyA glue joints Gap-filling CyA such Super Jet glue choice takes care irregularities introduced cutting out ribs Install glue %2 x 3A-in aileron spar cap place Pin /8 x %-in leading edge glue place Slide rear 46 x %-in spruce spar place glue Refer picture panel being assembled Cut out %2 x %-in diagonals glue place between ribs Glue /6 vertical-sheet webbing both sides spars Install -in gussets cor ners Sand bevel A-in leading edge conform ribs glue %2in leading edge sheeting place Turn panel over remove shims pin down jig ribs meet board stall leading edge sheeting aileron spar cap both panels have completed lay flat surface have drawn straight line over 70 long use piece Celotex job Pin panels down bottom spar along drawn line Use aliphatic resin epoxy glue rear spar spruce joiner spar stubs Clamp clothespins until dry Glue /8 x 1 in Lite Ply trailing edge joiner top trailing edges Glue x 7A x 6/2-in spar joiner tween main spars Epoxy x 1% x 6in ply joiner rear spars center section Glue x %-in leading edge halves together Glue %2 sheeting top center section aft spars Remove wing bench Glue aileron cranks place crank mounted Install V16 music wire pushrods Sheet bottom center section Note offset position aileron servo help ful counteracting weight sidemounted engine unnecessary twin cylinder Sand front leading edge sheeting flush /8 x 3A-in lead ing edge glue /8 x -in cap place Razor plane course-sand lead ing edge rounded shape Cut tips 3/6-in lightweight sheet balsa using WT- 1 rib outline Cut 34 Model Aviation ELECTRIC SERIES HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP WT-2 rib %-in sheet two WT-3 WT-4 lightweight -in sheet Glue WT-2 place shown glue tip WT- 1 position bot tom edge lining up bottom A-in leading edge bottom trailing edge rib No 10 Note photo tip parts assembled wing Disregard WT-5 piece photo using two pieces WT-4 instead per plan Sand WT-3 pieces conform No 10 rib glue Y32in tip sheeting place Sand tip rounded shape per cross section dia gram WT-2 Build ailerons directly over plans after installing ribs onto /8 x 1-in trailing edge lining up Tail surfaces Cut outlines shape glu ing x -in spars together make /2-in sandwich method construc tion reduces chance warped spars caused using solid -in piece Notch spars assemble surfaces over plans sandwich-type construction elevator rudder results very strong lightweight structure appears realistic covered Install hinges finished fuselage built using one-side-ontop-of-the-other routine After Lite Ply doubler A-in balsa sides have cut out glued together insert waxed paper between sides build directly over plan Dont forget gluing up ply balsa forward side pieces have both right side left Con tact cement used pieces prototype CyA applied around edges Separate sides finished pin down over top view former F-4 tail post Trial fit F-4 trim needed Check fit F4-B sand angle bottom snug fit F-4 Cut temporary angles scrap balsa pin place behind F-4 loca tion Epoxy F-4 place epoxy F4-B top F-4 positioned against gles Use 900 angle get tail post square glue sides together Cut aft fuselage crosspieces place over plan noting difference width top bottom shown photos plans Again discrepan cies show up between photos plans always follow plans reflect changes made after photos taken Glue /8 x -in diagonals place shown top view Pin F-5 F-6 position trial fit stringers straightness Pin F-7 place trial fit /6 x 3A-in top longerons Trim form ers necessary good fit Glue stringers formers longerons place Place F-i slots sides pull sides together using rubberband lock F-t Slide former F-3 place pinning bottom sides securely will pull meet F-3 firmly youre satisfied fit DWBRO TRIPSPIN KEEPS YOU IN Quick easy assemble Universal Designed balance items listed above special accessories Strong stable durable balancing wheels recessed prevent damage accidently dropped Du-Bros Tm- Spin prop balancer adjustable vertically horizontally conform balancing need Truly precision instrument built modelers expect very best Available now local hobby shop BALANCES AIRPLANE PROPSALL SIZES JET FANS BOAT PROPS HELICOPTER ROTOR HEADS SPINNERS CAR WHEELS AND MOTOR GEARS DU-BRO PRODUCTS INC 480 Bonner Road onda IL 60084 July 1989 35 BALANCE Specially designed locking cone securely centers locks props onto balancing shaft utmost accuracy PRECISION MODEL PRODUCTS pa USA BARSTOCK ALUMINUM SPINNERS Pan NoSize TI-iSO-B 112 TT-175-8 /4 TT-200-B 11-225-B .. 2-1/4 11-226-B 1/4 FAt 11-250-B .. 2-1/2 11-251-B .. 2-1/2FAI 75-B 3/4 11-276-B 3/4 FAI .. 11-300-B 11-301-B FAll 11-325-B -1/4 11-350-B -1/2 11-375-B /4 00-B 4 RetailApprox PriceWeight $1395058 oz 1495095oz 1595100oz 1695160oz 1895150ez 1895190oz 2095170oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz S99S520 oz 6995S70 oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner Part NoSize 11-140-A .1/4-28 11-147-A 1/4-28/7mm 11-610-A6 x 1 0mm 11-710-A-7 x 1 0mm 11-516-A5/16-24 11-516-A5/16-24/8mm 11-810-A8x 10mm 11-825-A8x 125mm 11-375-A3/8-24 11-125-AlOx 125mm RetailApprox PriceWeight S495 . 061 oz 495 . z 495 . 063 oz 495 . oz 4950 76 oz 495076oz 495076oz 495075oz 595117oz 595115ox 3 Pieces Nut Washer aird Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 squareness epoxy F-3 position Glue A-in Lite Ply fuel tank base former F-2 keeping 900 former Check fit maple engine mounts through F-i F-2 F-3 choose use firewall commercial mount omit cut outs formers keep same center lines installing mount F- 1 Remove F-l F-2 structure Install fuel tank base former F2 Position F-2 slots pull sides gether rubberband install F-i slots Install engine mount pieces through holes epoxy formers maple stock Use CyA hold tank place silicone can used later final tank installation Stuff piece foam around fuel tank tubing outlet hole F1 epoxy seal off fuel-proof firewall smoker tank installed proto type future use Disregard photos showing tank tubing outlets unless also want include model Re move fuselage structure plans Glue A-in-sq spruce slots top formers F- 1 F-2 F-3 Lay / x A-in stringers place over F-i F-3 cut slots F-2 receive glue place Note photo stringers installed Glue F2-S F35 F3B-S sides Glue -in pine landing gear mounts place us ing liberal amounts epoxy Cut 4, ply sheeting over F-i F-2 using pattern plans Note grain make easier wrap around formers photos shows sheet ing place %2 balsa sheeting being installed behind ply Glue spruce cowl hold-down blocks place flush ply against F-2 Glue %2-in wing saddle strips place Glue FB Lite Ply pieces doublers F-3 Glue % x 3A-in maple blocks wing hold-downs FB F3 using epoxy Epoxy WM Lite Ply pieces fuselage % x 3A-in ma ple block underneath Place wing saddle pin place temporarily lining up trailing edge center centerline former F4B Square wing fuselage mea suring tail post No 10 rib trailing edge Pin firmly drill rear hold-down bolt hole using Y6-in bit Re move wing drill enlarge Y16-in hole wing trailing edge in Tap maple block 4-20 threads Reinstall wing bolt down trail ing edge Square wing again pin firmly Drill front hole fit piece Y16-in dowel Drill matching hole remove wing enlarge both wing holes 14 tap maple blocks /4 -20 Bolt wing place lay sheet polyethylene over wing center section shown photo Again referring photos pin top %2-in balsa strips place wing between F-3 F4-B Pin F3-A place checking fit against F3 Pin F3-B place checking fit straightedge F3-B forward F-2 ensure continuity top sheeting Sand trim necessary Install A-in-sq top balsa stringer two side / x A-in stringers shown photos Cut off rear portion top cabin strip F3-B F-4 Cut cabin cockpit sides lightweight -in sheet balsa using outline side view plan former F3-B CF Cut front rear h-in sheet doublers lightweight stock using cabin side pattern Glue place making right left side Glue lightweight 34-in trian gle stock top edge sides re ferring photos Draw lines polyethylene sheet former F3-B F4-B felt-tip pen Pin sides lines pin former CF back sides Place F4T against F4-B holding clothespin temporarily shown photo Glue two pieces / x 3A-in stock between CF F4-T two A-in pieces substi tuted single A-in piece glue line can used reference point shaping cabin area Glue sides CF F3-B Glue %-in side sheet between CF F4-T wetting wood fit curve neces sary Glue A-in sheet doubler side sheet Glue x 1-in cap top side Glue two-piece A-in sheet top CF aft F4-T per photo Glue %2-in sheet cabin floor place checking fits well sides Glue 34 x 1 /2-in soft block piece sides front F3-B sanding insides fit curve sheeting Rough cut exterior sides using pattern shown plans Refer photo showing desired shape soft block front Rough sand bumps out cabin area sides taking care dig wing sheeting Sheet sides F4-B aft tail post Remove cabin area polyethy lene sheet plan Make cutouts F3-A hold-down blocks lo cated Epoxy maple blocks F-3 epoxy piece /e-in Lite Ply inside %2in side sheeting blocks meet Drill through sheet blocks tap latter 4-40 bolts Enlarge hole side sheet 4-40 bolt well Glue -in top sheet turtleback place glue ply hold-down plate A-in dowel top cabin sheet Drill through dowel ply enlarge ply hole insert blind nut Screw cabin structure onto fuselage assembly Fair cabin areas side sheeting using 180-grit paper little patience careful sanding will make nice smooth transition turtle hump cabin area Place canopy over cabin structure trimming good fit along glue line Mark canopy outline pen carve inside area about A-in thickness sharp knife finish sandpaper hardest part building 36 Model Aviation PROP NUT ADAPTORS V model finished can now take fun break doll up cockpit floor painted flat black sides green zinc chromate color headache rack built using piece 3A6-in alumi num tubing top radius 346-in doweling painted zinc chromate re mainder instrument panel painted almond color shown detail color photos Mask off paint sheeting over front cockpit same blue will used final exterior finish prototype used Red Devil polyurethane Empire Blue Sigs Blue Sky Bright also close color Polings full-scale Lark simulate fiberglass band fullsize plane piece 46-thick %-in wide balsa laid across top curved glued ends painted chromate Williams 3-in-scale sport pilot used dressed up piece balsa block glued bottom shaped raise pilot proper height parachute painted red match red shoelaces used straps shoulder straps black shoelaces Starting Before Takeoff placard shown photo finished cockpit glued wall before gluing canopy canopy tinted hot water black Rit dye careful make too dark Swish canopy around large roasting pan little remove rinse cold water isnt dark enough repeat process until youre satis fied full-scale Lark has just sugges tion tint canopy prototype glued Testors cement green tube variety Any similar model ce ment should work just well Mask off canopy above paint line protect Finishing fuselage Install string ers glue F3-C F2-B F2-C place sheet section i/ x -in spruce strips may glued pine landing gear blocks Install /8-in sheet between blocks fill-in File 346-in brasstubing enclose main landing gear wire wrap soft wire shown plan photo Place gear slots pine blocks holding place screwing three -in brass strips leg using commercial straps Build cover over gear per photos plans Glue three-ply hold block 1A-in sheet balsa fill-in Drill down through fairing block tap block 4-40 bolt Screw fairing place sand ing fit F2-C F3-C formers photos shows foam form shaping cowling using one-off meth od Believe folks aint worth considering cost foam boat glass epoxy hours sanding filling cutting holes etc T&D Fiberglass Specialties fers ready-to-finish cowl sample Tom Keeling sent fit fuselage per fectly would highly recommend purchas ing cowl wheel pants canopy Tom T&D canopy formed 040 material beaut requiring slight trimming perfect fit tried mold canopy 15 times before finally giv ing up easier cover tail surfaces before installing fuselage Sig Koverall nitrate dope used model excellent results After bolting wing slip stabi lizer place ensuring its square trailing edge wing level wing Make certain stabilizer true before gluing place Slip el evator used Klett pinpoint hinges secur ing aliphatic resin Install fin its slot squaring tail post us ing 900 angles side assure square ness stab Make up tail wheel assembly glue place use commercial assemblies securing ply plate epoxied fuselage bottom Install rudder glue hinges prototype given two coats ni trate dope wherever Koverall met structurethat ribs leading edge sheet tips trailing edge fuselage stringers front sheeting turtledeck sheeting Af ter sanding 220-grit paper Koverall installed brushing nitrate through material contact points iron set medium heat beauty taut covering immediately apparent magic Thats uppers building stick-and-rag models Five coats thinned nitrate brushed entire model coat thinned nitrate mixed talcum powder pure kind starch applied sanded smooth 220 Tri-M-ite followed three coats ni trate sanded 360-grit paper Finally sprayed polyurethane mist coat fol lowed fairly wet doubt could have applied red stripes Coverites Graphic Stripes 6-in sizes right mark scale appearance red ex actly matches color full-scale plane stripes joy apply eliminate masking spraying would otherwise required Theyre no thicker coat paint have beau tiful gloss Prime Time lettering Polings name hand painted 0-size long haired sable brush using Sig Skybright Yel low bottom half mixing red create orange top half reg istration numbers letters -in Hel vetica No 411 Presto Stik Vinyl letters found office supply stores Use 030-in music wire wire brac ing tail feathers %-in length %2in brass tubing flattened end drilled hole soldered wire No 2 screws used hold brac ing through holes drilled hardwood mounts ply reinforcements stab fin No 32 straight pins Sig se cured aliphatic resin used sheeted parts simulate Dzuz fasteners PK screws driven metal Continued page 141 New Rocket Uses B C andD Engines. Capability No Else Offers MRC s recent introduction 25 Moonbiaster inter mediate kit brings yet another technological advance MRCs Computer Aided Designs CAD built carry B4-2 C6-3 engines However Moonbiaster also commercially sold rocket kit includes easy-touse adapter also allows louse powerful Dengines Builtto take blast Moon blaster features large die-cut balsa fins blowmolded nose cone superb space capsule detailing Self stick decals 18chute Send free catalog See full line advanced MRC rockets hobby dealer cant help callus directly MRCe Model Rectifier Corporation 2500 Woodbridge Ave Edison NJ 08817 201 985-7800 July 1989 37 Safety/Preston Continued page 20 types animals including birds Nobody can predict time hot spots 1989 season will since known hot spots close us would wise outdoor modelers know something about disease what to avoid what symptoms aware First avoidance cant avoid encounter ing ticks small over place pet owners know However ob serving few precautions can keep ing bitten and/or infected Actions will keep ticks off skin effective preventa tive measures Ticks dwell low shrubbery grass blades get onto shoes kles lower legs crawl upward Wear long pants cinched ankle tucked socks boots less access skin bet ter Check clothing frequently especially youve through field brush retriev ing downed airplane Wearing light-colored clothing makes easier spot little devils Repellents containing Deet can used effec tively clothing shoes pants socks di rect application high concentrations skin advised new product Permanone available may effective Applied clothing both repels kills ticks After day field check feet kles legs attached ticks tick nymphs about size pinhead feeding Any find should removed imme diately fine curved-tip tweezer Grasp tick close possible its mouth part sticking skin pull outward firmly jerking Alternate methods tick re moval alcohol heat vaseline etc popular past have shown less effective good removal fast removal less chance infection Immediately after removing tick disinfect bite rubbing alcohol betadine Unfortunately victims never see tick infects symptoms Lyme dis ease include various types rash may de velop weeks after infection fatigue stiff neck flu-like symptoms headache chills fever muscle aches arthritislike symptoms difficult disease victims recognize doctor diagnose pattern symp toms varies widely case case symptoms mimic other illnesses See doctor symptoms lead suspect have disease Early treatment effec tive Untreated disease progressive can become serious its advanced stages Jesse also sent copy article Lyme disease appeared Consumer Reports June 1988 pages 382-385 Another article disease can found March 1 1989 sue American Nurseryman feature article article states New York Medical College investigating connec tion between Lyme disease multiple sclerosis MS both have similar symptoms alert ticks have safe month Lark/Shepherd Continued page 37 Brads plane scimitar show prop carved piece 2 x 12-in white pine shelving material covered multi ple coats nitrate high-gloss finish painted same white used model Designing building beguiling air plane very satisfying enjoyable Though problems cropped up solving could frustrating times playing Daedelus definitely worth too can have quarter-scale model beauti ful home-builtand fly off work bench instead drawing board Whats wont need cargo van carry flying fieldor contest site En joy building flying unique little Lark Radio Technique/Myers Continued page 41 5 A-in disk Microsoft 9 Sector format usable IBM PCs compatibles Other formats may available need Ask WIMP will ASCII accompanied handbook will have some hints conver sions other computers files disk RC Slope Soaring/Triebes Continued page 47 instant perfection successful flight landing hinting promise things come knew what next couple hand tosses Continued page 144 July 1989 141
Edition: Model Aviation - 1989/07
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 141
NO OCR TEXT NO OCR TEXT aileron servo seen has delib erately installed off-center help counter act weight side-mounted engine Top view stab/elevator showing brace wires terminals registration numbers /4-in Presto vinyl stick-ons desire build own airplane undi minished 1975 Brad began researching home-builder designs As research contacts home builders broadened found himself repeatedly turning good look landing gear mounting ar rangement along spreader bar Note wing strut -in brass mounts behind rear leg screwed l/ x -in spruce strip three-ply fairing holddown block exhaust pipes can seen close-up rudder/elevator assem bly shows -in brass mounts termi nals 030 music wire bottom brace pushrod exit slot rudder horn tail wheel assembly tail wheel homebrew assembly commercial unit appropriate size would serve just well Lark ideal projecta conservative de sign strongly built good performance low power easy fly Brad pur chased set plans went work contacted Ron Darcy help him through much construction process knowing weld en rolled night course community college started practicing scraps 26 Model Aviation Radio equipment stored away aTt ena bay Plans show exact location Author/designer Brad Shepherd Victoria TX Prime Time Only four months after its initial flight tests airplane took top honors October 1988 Scale Rally Austin TX real testament authors design skills craftsmanship piloting ability / Wheel pant installation showing radius pant inside face along two screws going through Sig wheel mount Exhaust stack fittings made -in brass strip high-temp soldered %-in brass tubing pipe engine ex haust other crankcase breather Aluminum-painted fairing witn *s pin heads screwheads closely simulates Polings full-scale Lark wing walk black Coverite Graphic roughed 180 grit no step dry-transfer lettering red striping Coverite Graphic stripes &RITO 65 4- TROK 3/&/4lflPk FIERGLA&Q \ \ - UTPLY Y4&Q&PAR N RPER TORRR N 94x3/8 QPRUCE S fl 8IIEET K \ Xz &HEET K \\\ \$7.iT2 6 7II 7/ ERGLR& CORE Left The right wing panel parts assembled glued up center section excess hasnt cut off yet Right left right panels being attached Note plywood plate over 1/8-in trailing edge rear spar spruce doubler -in sheet between spars Left The left wing tip showing -in WT-2 angle rib -in edge pieces glued 346-in WT-1 Follow plans discrepancy between drawing what see pictures Right fuselage sides being built over plans top other wax paper between best way assure two sides will identical resulting true fuselage assembled 4130 tubing time course completed ready start welding fuselage As quickly realized Brad thrown himself squarely uncompromising world big airplane construction No room Kelehers excellent plans gimmicky Mickey Mouse-type setups tubing sizes large home-built wing spar plenty beefy Brad put lust hellishly stout airplane Two other people deserve credit efforts assisting Brad progressed project A&P mechanic Jim Waiter kept him course lot little things dur ing Brads three-year stint companys headquarters Chicago good friend Larry Pennock made instruments work helped details did finish painting novel departure standard construc tion practice elimination rib stitching wing gluing 1 -in cap strips ribs gluing fabric caps After doping preliminary work including cowling metal parts finished Larry sprayed air craft Du Pont Centauri acrylic enamel turned out glossy Brad has never felt need rub out Since Larry Pinnock flying ex perience elected first flight honors Neither Larry nor Brad flown tail-dragger before both checked out first Super Cub Larry no problems Larks first flight pronounced aircraft real dandy Heres Brads panegyric after first flight Before off end runway Napa knew easy airplane fly Its very stable just outrageously easy handle Landing have such great visibility its hard get really out shape once youre ground rolls out beautifully Its twitchy Since sit centerline fuse lage can instantly detect drift crosswind correct before get trouble Its very very docile air plane During designing drawing build ing phases kept hoping upbeat words about full-scale Larks flight would carry through models charac teristics After six months drawing cut ting gluing fitting refitting redrawing etc finally have answer 28 Model Aviation sides pinned down over plans top view formers F4 F4B glued place along -in balsa gussets turtledeck formers temporarily pinned place will eventually moved shown plans during later phase construction good view showing downward angle sides fuselage being assembled COA3 LINE NOTE F-3A F39 8jITE FTO F 1/LITE PLY SHAPE AT COWL LINE r1IIIIII~ ~T/TGA TA NO NONE F1TFTF-OS3OS3~F NO'j11111111112111111111j12FRRALSA 33 SAD 10 RPL SOTJNEER 5301305ROT 50033025ROTI I25I J 3803/ ON 3/30 ALUMMOPE WM PlATES O EDT3532134A P NE NOflOM H M PLERTAOS ETRP 1/GRALSA S EPOXY WELL PA T8BALOA FOR BA TAT7i74I FE ADOB 32/ELITE PLY FOEBALSA/32NE________ -ROOT -TX P ALL DIAGONALS ARE 11051/0 FAR3/32 TSP ST IPWHEN BITLOING COBIN ON WINO i 05p{3TF-3RTWIU0321145 3 /T6ALUM TOEING POR RADIOS /CFT/BALSAFROM /TAO FINEROLASS 30905 BLOCK SEPT 0 3034313201343132GARDENCITY MI ART3SOIT/ATHEET II3AOFAF-SLIGHT I/O OGlEALLTOPFWTMER STRINGERS----3- ~ .--- -PH ATE STRAIGHTEDGE ALONOOMITTED FOR CLARITYpo--OUTMO 313FT1/A SLOT FOR FIN LA TSP OF FUSE WHEN FITONOFTIAI /I J\----\ ____-AL\ COWL--- IAA32SPRJCEIIAtLIAAT ADA 1341133 CF TM1I"IRLITEFLT- i 33AFLEMLOACTR I TFAR01430 T3F3I1 MTDEET3 3-332353 SUMORAODLU& OF OARLAR -I32433 I332ON-ZYEDMFATMLEI33/tj5 -- - - 33F 3D RRADRTSTOA3-OIMEN32ORIIRLITEPLT 0132FR----- SOARIR IS TSR SAnTA-IRISIM332DTBLFTSTRTT450800KAFMSRRAI MAKE CORRECTION IFIAO1INOAT1IOXT/0 ASEICIIRA/i32ONRLED3T- 3-T13 0t13231R13R001301 ATTACI ~ IRCOCSOSTORI -OCASISESOSFER iCOOCCO I135iCEAT 00033 \-13321 I UtOMOSS STRIP FIREGGLASS COWL &WHEELRRO3TS TAD FIREOGLASS[1fl 30925 RLSCK SEPTAEMARSIDN N TARSEN CITY ML0GT3OIAMNLSOSOENTI33030505BLAB KELEHER LARK K 2 SECTION OF LE PLACE NOEREBOIL MMAIODRS&EFOOT DEL SCALE -3T F a758 SOINPROLAREA-R FOR 00 OTSO POOR SIB ORE 3235 MMI343RDESIG13ED&DRAWNRY BRAS SHEPHERD DARED 0100Mi______________________________________ 323241013 ED43Dis32/33LFM Left Formers Fl 2 3 have inserted side panels glued place along maple engine mount stock slots top stringers former F-2 cut after formers place adjusted straightedge across top three tubing jutting out under engine mount stock attached tank will used smoke system installed later date Right side formers have installed along %2-in balsa sheeting 1/64-in plywood has wrapped around formers F-i F-2 glued place engine mount holes have drilled engine has temporarily installed order fit fiberglass cowl %2-in saddle strip wing opening glued place Note pine landing gear mounts showing through notches cut sides Left The wing has positioned bolted Polyethylene sheet has taped over wing %2-in top strip has pinned place Formers F3A F3B have positioned lined up straightedge before gluing stringers place gluing strip Balsa former F4T has clothespinned place Right Balsa sheet has glued over F3A F3B Former CF has beehi glued along strips F4T lAin sides doublers triangles have glued place %2-in cockpit floor installed Left The %-in balsa sheet has attached CF F4T Note curve transition turtledeck sides under canopy Right layer 1/4in balsa sheet has glued top CF F4T in balsa cap has glued over side assembly June 1988 15 years after Kelehers design truck necessary flight gear turned plane wind let idle first captivated prototype model wing struts bolted along moment always have butterflies Lark ready its maiden flight show prop some picture taking new creation first salutes skies After changing prop fired up 65 excitement wanting see fly June 23 1988 Steen Airstrip south Saito checked rpm began taxiing pretty much kept bay time Texas unloaded Lark pickup Going far end grass strip 430 pm throttled model up 30 Model Aviation EZE2 E3 SORTS/3/TRX 119 TEASELEVATOR1IBO1AlIAWITE -~iLiI- ----ITIRH ELEVATOR TIE BAR 3/3233/8 WEBI/S1/4 IU2SS~ [v32][b-1-10-1-10]]-AU- -------- 3/32/ R6 3/ 32 X 3/6 REAR LARLOOI sItTYR ARTHURACTUAL LAYOUTIUPR STRUT SJLEFT WING T/16 WEB r1-3/TR - r I-I-S4H~ HI 585II ---I- T. 3/16 T/2GU 10- APF--1— ___I------- ___-ijI SOSUT ATTACI4 1/40112 SPRUCE P51 1116 PUTREOHESARE RARLEARLLSHWTH 7RAIRRO 1/AO1/2 SPRUCE A0- ----A-II [v32][b-1-10-1-10]]A REAR SPAR 3/1653/B SPRUCE II 1553/6A 10I ACRE RAREI I1/5015/16 1 SET/RATIFY13/T/IRII/2FIIHR STRAIGHT GRAIN BALSAISLITS PLY 13/THYRIRS 3-ASRIBS 7-6-SI6*LA1~ET54 12EAU129 _CD 7-H CD ALL RIBS 1/B MES C GRAIN BBS 1-2RIBS 6-TO SHY HUT BIRCH PLo 2IEAUZIEG CDCD 1/2 RRTTERN FOB 5440W PROP 1/453/4 1/B SHIMS 2 p1501/2 SPRUCE WIT LIGHT 3/16-801/2 RIBST 7 EIN /jI 16-P W2HRHSRS RR W2T 364 1I AT ATS 250 NOTE rn SALESSE0 KELEHER LARK JK1B SB4GLE PLACE HOSREWIILT MODEL SCALE 3 T BIT/B IAHI IRHRSRHA BA I/B T/BXT/ 3/T601/8 RUDDER 21 401/21/ R-31/R p 3/16EASIDEHAR-S 1/B SHAH FLRTNS WITRRRELHSR TSHSAUIN PROLAREABLBGOZ FOR 60 TONG F STRORE DESIGNED DRAWN BE BRAD SHEPHERD 1/16 VEST WE 1/16 PIT 3/A 3/3203/B ALS Tsp 3/ 32 SHE E 1/801/2/ IHASTRRRHH SORWE 3/16X 3/805-T/2 SPRUCE 3i K 3/IMS TIP 1/16MW I/A S0SRRRU P65441 EDGE OF - 1/SOIIG RIGHT WING RITA GUSSET 3/3203/B WEBBING I7 1/4 / Left Starting rough shape cabin Section under canopy front soft block has fitted curved top sheet top layer -in sheet over CF F4T has roughed out Right Fitting marking canopy final shaping cabin section Left Trimming inside cabin section final shape Note outside has sanded smooth clean joint between cabin turtledeck Also note line fitting canopy Right good view transition turtledeck cabin accom plished careful sanding front F4T photo also shows horizontal stabilizer under left wing construction quite clearly Left Detailing cockpit area 3A6-in dowel tube roll bar has installed start procedure takeoff placard has glued after coating wood roll bar zinc chromate green floor flat black Brad Polings likeness waiting behind right wing Right instrument panel has finished front decking has painted blue 1Ao x -in balsa band simulating fiberglass bow over top instrument panel has installed chromated turtledeck has finished side sheeting com pleted stringers place 3A6-in landing gear fairing core attached landing gear pilot has detailed installed headed down strip playing rud der slightly keep true about 100 ft before touching up eleva tor Lark flying let climb out farther feeding little right aileron trim made 180 turn came back over field moving sticks check re sponse 1800 turn other end brought back Response good entered loop steady-running Saito allowed nice round figure 01 Dad getting elated pulled up 450 climb snapped Doing perfect imitation full-scale Lark would snap stopped wing horizontal still going up 450 After four-point roll vertical climb pushed out slowed stall nosed down about fl0 recovered throttled back got pattern Things going well tell myself get carried away have brain drain very first flight first landing too eager sticks slipped model little out form rocking back forth bounc ing around model flipped last bounce due overcontrolling elevator fortunately no damage except little scuffing canopy worked out better way second flight setting airplane up fairly long ap proach after base keeping low reduced power until crossed edge strip cutting throttle letting settle Dont try three-point landing like did first flight Bring model down its main gear let tail settle slows second flight executed number 32 Model Aviation Left Close-up showing 3A6-in brass tubing rear landing gear strut radius filed ready wrapping soldering Right Building fairing cover landing gear bottom formers F2B F2C have installed sheeted Polyethylene sheet has laid over landing gear attach area former F3C has attached 3/8-in sidepieces pinned ready 1/4-in sheet Left The %-in sheet fill-in between landing gear mounts has installed three-layer Lite Ply fairing mount has attached along bottom stringers Right bottom fairing has sanded round front angular back transitions along bottom Careful sanding shaping will result smooth scalelike appearance photos finished airplane clearly show touch-and-goes taught set model up landing properly second flight demonstrated right power weight Lark will whatever maneuvers pilot capable put through works three-turn spin immediate recovery release nose down about 600 coming out outside snap rolls loops inside snaps top rolls knife-edge flight outside loops slow flybyswith modeling buddy Leon Folse taking pictures heard voice behind propose inverted flyby immediate reaction guy nuts Ive got six months love labor flying around out wants take picture inverted pass second flight same guy egged flying Chips Model Aviation June 1981 inverted test flightand Chips Lark Pleading temporary insanity again gave Leons reckless request got picture want fine-looking quarter-scale model has lot character wont bust budget wont require van trans port good flier look over plans consider Lark Its difficult model build final results wont disappoint Itll major contender Sport Scale Giant Scale contest may want enter youll still have July 1989 33 plywood formers foam block carved shape coat epoxy before applying fiberglass over off cowl lot effort expense recommended because quality cowl along strong 040 butyrate can opy wheel pants now available Tom Keeling T&D Fiberglass Specialties completed model its bare bones stage just prior covering As can seen f ished structure appears very strong airplane capable withstanding heavy use Leader Small Airfoil Technology MAStER AIRSCREW four series choose Master Airscrew offers full line propellers flying application made tough glass-filled nylon superior strength durability G/F SERIES Designed sport flyer G/F Series available 28 popular sizes 5-11 diameters K SERIES K Series designed 4 2 stroke applications Wide undercambered blades provide greater thrust slower turning 4 strokes 8 sizes including new 12 x 8 15 x 10 tips painted safety ANTIQUE SERIES performance series features scimitar shape swept back tips plenty undercamber s suitable application Sizes 12 x 6 13 x 6 14 x 7 16 x 7 new 10 x 5 11 x 6 gold glass-filled nylon 12 x 8 15 x 12 foldIng propellers geared systems 8 selffeathering adjustable pitch prop 05 direct drive give improved thrust glide less drag fixed blade props See Hobby Dealer MASTER AIRSCREW propellers accessories Windsor Propeller Company 384 Tesconi Court Santa Rosa CA 95401 great-looking model super weekend fly ing Construction Wing assure accuracy assem bling wing panels cut out set mas ter ribs /32 ply Mark rib its position panel after its cut out pre clude chance error building Pin piece A-in-sq balsa jig line shown Place 3/6-in shims under front bottom spar pin A-in-sq spar shims Cut small 900 triangle /32 ply use keep ribs vertical install ing spar Install top A-in sq spar pinning place after ribs have pinned A-in-sq jig bottom spar Install /8 x 1 /2-in trailing edge slots ribs satis fied assembly square straight use cyanoacrylate CyA glue joints Gap-filling CyA such Super Jet glue choice takes care irregularities introduced cutting out ribs Install glue %2 x 3A-in aileron spar cap place Pin /8 x %-in leading edge glue place Slide rear 46 x %-in spruce spar place glue Refer picture panel being assembled Cut out %2 x %-in diagonals glue place between ribs Glue /6 vertical-sheet webbing both sides spars Install -in gussets cor ners Sand bevel A-in leading edge conform ribs glue %2in leading edge sheeting place Turn panel over remove shims pin down jig ribs meet board stall leading edge sheeting aileron spar cap both panels have completed lay flat surface have drawn straight line over 70 long use piece Celotex job Pin panels down bottom spar along drawn line Use aliphatic resin epoxy glue rear spar spruce joiner spar stubs Clamp clothespins until dry Glue /8 x 1 in Lite Ply trailing edge joiner top trailing edges Glue x 7A x 6/2-in spar joiner tween main spars Epoxy x 1% x 6in ply joiner rear spars center section Glue x %-in leading edge halves together Glue %2 sheeting top center section aft spars Remove wing bench Glue aileron cranks place crank mounted Install V16 music wire pushrods Sheet bottom center section Note offset position aileron servo help ful counteracting weight sidemounted engine unnecessary twin cylinder Sand front leading edge sheeting flush /8 x 3A-in lead ing edge glue /8 x -in cap place Razor plane course-sand lead ing edge rounded shape Cut tips 3/6-in lightweight sheet balsa using WT- 1 rib outline Cut 34 Model Aviation ELECTRIC SERIES HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP WT-2 rib %-in sheet two WT-3 WT-4 lightweight -in sheet Glue WT-2 place shown glue tip WT- 1 position bot tom edge lining up bottom A-in leading edge bottom trailing edge rib No 10 Note photo tip parts assembled wing Disregard WT-5 piece photo using two pieces WT-4 instead per plan Sand WT-3 pieces conform No 10 rib glue Y32in tip sheeting place Sand tip rounded shape per cross section dia gram WT-2 Build ailerons directly over plans after installing ribs onto /8 x 1-in trailing edge lining up Tail surfaces Cut outlines shape glu ing x -in spars together make /2-in sandwich method construc tion reduces chance warped spars caused using solid -in piece Notch spars assemble surfaces over plans sandwich-type construction elevator rudder results very strong lightweight structure appears realistic covered Install hinges finished fuselage built using one-side-ontop-of-the-other routine After Lite Ply doubler A-in balsa sides have cut out glued together insert waxed paper between sides build directly over plan Dont forget gluing up ply balsa forward side pieces have both right side left Con tact cement used pieces prototype CyA applied around edges Separate sides finished pin down over top view former F-4 tail post Trial fit F-4 trim needed Check fit F4-B sand angle bottom snug fit F-4 Cut temporary angles scrap balsa pin place behind F-4 loca tion Epoxy F-4 place epoxy F4-B top F-4 positioned against gles Use 900 angle get tail post square glue sides together Cut aft fuselage crosspieces place over plan noting difference width top bottom shown photos plans Again discrepan cies show up between photos plans always follow plans reflect changes made after photos taken Glue /8 x -in diagonals place shown top view Pin F-5 F-6 position trial fit stringers straightness Pin F-7 place trial fit /6 x 3A-in top longerons Trim form ers necessary good fit Glue stringers formers longerons place Place F-i slots sides pull sides together using rubberband lock F-t Slide former F-3 place pinning bottom sides securely will pull meet F-3 firmly youre satisfied fit DWBRO TRIPSPIN KEEPS YOU IN Quick easy assemble Universal Designed balance items listed above special accessories Strong stable durable balancing wheels recessed prevent damage accidently dropped Du-Bros Tm- Spin prop balancer adjustable vertically horizontally conform balancing need Truly precision instrument built modelers expect very best Available now local hobby shop BALANCES AIRPLANE PROPSALL SIZES JET FANS BOAT PROPS HELICOPTER ROTOR HEADS SPINNERS CAR WHEELS AND MOTOR GEARS DU-BRO PRODUCTS INC 480 Bonner Road onda IL 60084 July 1989 35 BALANCE Specially designed locking cone securely centers locks props onto balancing shaft utmost accuracy PRECISION MODEL PRODUCTS pa USA BARSTOCK ALUMINUM SPINNERS Pan NoSize TI-iSO-B 112 TT-175-8 /4 TT-200-B 11-225-B .. 2-1/4 11-226-B 1/4 FAt 11-250-B .. 2-1/2 11-251-B .. 2-1/2FAI 75-B 3/4 11-276-B 3/4 FAI .. 11-300-B 11-301-B FAll 11-325-B -1/4 11-350-B -1/2 11-375-B /4 00-B 4 RetailApprox PriceWeight $1395058 oz 1495095oz 1595100oz 1695160oz 1895150ez 1895190oz 2095170oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz S99S520 oz 6995S70 oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner Part NoSize 11-140-A .1/4-28 11-147-A 1/4-28/7mm 11-610-A6 x 1 0mm 11-710-A-7 x 1 0mm 11-516-A5/16-24 11-516-A5/16-24/8mm 11-810-A8x 10mm 11-825-A8x 125mm 11-375-A3/8-24 11-125-AlOx 125mm RetailApprox PriceWeight S495 . 061 oz 495 . z 495 . 063 oz 495 . oz 4950 76 oz 495076oz 495076oz 495075oz 595117oz 595115ox 3 Pieces Nut Washer aird Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 squareness epoxy F-3 position Glue A-in Lite Ply fuel tank base former F-2 keeping 900 former Check fit maple engine mounts through F-i F-2 F-3 choose use firewall commercial mount omit cut outs formers keep same center lines installing mount F- 1 Remove F-l F-2 structure Install fuel tank base former F2 Position F-2 slots pull sides gether rubberband install F-i slots Install engine mount pieces through holes epoxy formers maple stock Use CyA hold tank place silicone can used later final tank installation Stuff piece foam around fuel tank tubing outlet hole F1 epoxy seal off fuel-proof firewall smoker tank installed proto type future use Disregard photos showing tank tubing outlets unless also want include model Re move fuselage structure plans Glue A-in-sq spruce slots top formers F- 1 F-2 F-3 Lay / x A-in stringers place over F-i F-3 cut slots F-2 receive glue place Note photo stringers installed Glue F2-S F35 F3B-S sides Glue -in pine landing gear mounts place us ing liberal amounts epoxy Cut 4, ply sheeting over F-i F-2 using pattern plans Note grain make easier wrap around formers photos shows sheet ing place %2 balsa sheeting being installed behind ply Glue spruce cowl hold-down blocks place flush ply against F-2 Glue %2-in wing saddle strips place Glue FB Lite Ply pieces doublers F-3 Glue % x 3A-in maple blocks wing hold-downs FB F3 using epoxy Epoxy WM Lite Ply pieces fuselage % x 3A-in ma ple block underneath Place wing saddle pin place temporarily lining up trailing edge center centerline former F4B Square wing fuselage mea suring tail post No 10 rib trailing edge Pin firmly drill rear hold-down bolt hole using Y6-in bit Re move wing drill enlarge Y16-in hole wing trailing edge in Tap maple block 4-20 threads Reinstall wing bolt down trail ing edge Square wing again pin firmly Drill front hole fit piece Y16-in dowel Drill matching hole remove wing enlarge both wing holes 14 tap maple blocks /4 -20 Bolt wing place lay sheet polyethylene over wing center section shown photo Again referring photos pin top %2-in balsa strips place wing between F-3 F4-B Pin F3-A place checking fit against F3 Pin F3-B place checking fit straightedge F3-B forward F-2 ensure continuity top sheeting Sand trim necessary Install A-in-sq top balsa stringer two side / x A-in stringers shown photos Cut off rear portion top cabin strip F3-B F-4 Cut cabin cockpit sides lightweight -in sheet balsa using outline side view plan former F3-B CF Cut front rear h-in sheet doublers lightweight stock using cabin side pattern Glue place making right left side Glue lightweight 34-in trian gle stock top edge sides re ferring photos Draw lines polyethylene sheet former F3-B F4-B felt-tip pen Pin sides lines pin former CF back sides Place F4T against F4-B holding clothespin temporarily shown photo Glue two pieces / x 3A-in stock between CF F4-T two A-in pieces substi tuted single A-in piece glue line can used reference point shaping cabin area Glue sides CF F3-B Glue %-in side sheet between CF F4-T wetting wood fit curve neces sary Glue A-in sheet doubler side sheet Glue x 1-in cap top side Glue two-piece A-in sheet top CF aft F4-T per photo Glue %2-in sheet cabin floor place checking fits well sides Glue 34 x 1 /2-in soft block piece sides front F3-B sanding insides fit curve sheeting Rough cut exterior sides using pattern shown plans Refer photo showing desired shape soft block front Rough sand bumps out cabin area sides taking care dig wing sheeting Sheet sides F4-B aft tail post Remove cabin area polyethy lene sheet plan Make cutouts F3-A hold-down blocks lo cated Epoxy maple blocks F-3 epoxy piece /e-in Lite Ply inside %2in side sheeting blocks meet Drill through sheet blocks tap latter 4-40 bolts Enlarge hole side sheet 4-40 bolt well Glue -in top sheet turtleback place glue ply hold-down plate A-in dowel top cabin sheet Drill through dowel ply enlarge ply hole insert blind nut Screw cabin structure onto fuselage assembly Fair cabin areas side sheeting using 180-grit paper little patience careful sanding will make nice smooth transition turtle hump cabin area Place canopy over cabin structure trimming good fit along glue line Mark canopy outline pen carve inside area about A-in thickness sharp knife finish sandpaper hardest part building 36 Model Aviation PROP NUT ADAPTORS V model finished can now take fun break doll up cockpit floor painted flat black sides green zinc chromate color headache rack built using piece 3A6-in alumi num tubing top radius 346-in doweling painted zinc chromate re mainder instrument panel painted almond color shown detail color photos Mask off paint sheeting over front cockpit same blue will used final exterior finish prototype used Red Devil polyurethane Empire Blue Sigs Blue Sky Bright also close color Polings full-scale Lark simulate fiberglass band fullsize plane piece 46-thick %-in wide balsa laid across top curved glued ends painted chromate Williams 3-in-scale sport pilot used dressed up piece balsa block glued bottom shaped raise pilot proper height parachute painted red match red shoelaces used straps shoulder straps black shoelaces Starting Before Takeoff placard shown photo finished cockpit glued wall before gluing canopy canopy tinted hot water black Rit dye careful make too dark Swish canopy around large roasting pan little remove rinse cold water isnt dark enough repeat process until youre satis fied full-scale Lark has just sugges tion tint canopy prototype glued Testors cement green tube variety Any similar model ce ment should work just well Mask off canopy above paint line protect Finishing fuselage Install string ers glue F3-C F2-B F2-C place sheet section i/ x -in spruce strips may glued pine landing gear blocks Install /8-in sheet between blocks fill-in File 346-in brasstubing enclose main landing gear wire wrap soft wire shown plan photo Place gear slots pine blocks holding place screwing three -in brass strips leg using commercial straps Build cover over gear per photos plans Glue three-ply hold block 1A-in sheet balsa fill-in Drill down through fairing block tap block 4-40 bolt Screw fairing place sand ing fit F2-C F3-C formers photos shows foam form shaping cowling using one-off meth od Believe folks aint worth considering cost foam boat glass epoxy hours sanding filling cutting holes etc T&D Fiberglass Specialties fers ready-to-finish cowl sample Tom Keeling sent fit fuselage per fectly would highly recommend purchas ing cowl wheel pants canopy Tom T&D canopy formed 040 material beaut requiring slight trimming perfect fit tried mold canopy 15 times before finally giv ing up easier cover tail surfaces before installing fuselage Sig Koverall nitrate dope used model excellent results After bolting wing slip stabi lizer place ensuring its square trailing edge wing level wing Make certain stabilizer true before gluing place Slip el evator used Klett pinpoint hinges secur ing aliphatic resin Install fin its slot squaring tail post us ing 900 angles side assure square ness stab Make up tail wheel assembly glue place use commercial assemblies securing ply plate epoxied fuselage bottom Install rudder glue hinges prototype given two coats ni trate dope wherever Koverall met structurethat ribs leading edge sheet tips trailing edge fuselage stringers front sheeting turtledeck sheeting Af ter sanding 220-grit paper Koverall installed brushing nitrate through material contact points iron set medium heat beauty taut covering immediately apparent magic Thats uppers building stick-and-rag models Five coats thinned nitrate brushed entire model coat thinned nitrate mixed talcum powder pure kind starch applied sanded smooth 220 Tri-M-ite followed three coats ni trate sanded 360-grit paper Finally sprayed polyurethane mist coat fol lowed fairly wet doubt could have applied red stripes Coverites Graphic Stripes 6-in sizes right mark scale appearance red ex actly matches color full-scale plane stripes joy apply eliminate masking spraying would otherwise required Theyre no thicker coat paint have beau tiful gloss Prime Time lettering Polings name hand painted 0-size long haired sable brush using Sig Skybright Yel low bottom half mixing red create orange top half reg istration numbers letters -in Hel vetica No 411 Presto Stik Vinyl letters found office supply stores Use 030-in music wire wire brac ing tail feathers %-in length %2in brass tubing flattened end drilled hole soldered wire No 2 screws used hold brac ing through holes drilled hardwood mounts ply reinforcements stab fin No 32 straight pins Sig se cured aliphatic resin used sheeted parts simulate Dzuz fasteners PK screws driven metal Continued page 141 New Rocket Uses B C andD Engines. Capability No Else Offers MRC s recent introduction 25 Moonbiaster inter mediate kit brings yet another technological advance MRCs Computer Aided Designs CAD built carry B4-2 C6-3 engines However Moonbiaster also commercially sold rocket kit includes easy-touse adapter also allows louse powerful Dengines Builtto take blast Moon blaster features large die-cut balsa fins blowmolded nose cone superb space capsule detailing Self stick decals 18chute Send free catalog See full line advanced MRC rockets hobby dealer cant help callus directly MRCe Model Rectifier Corporation 2500 Woodbridge Ave Edison NJ 08817 201 985-7800 July 1989 37 Safety/Preston Continued page 20 types animals including birds Nobody can predict time hot spots 1989 season will since known hot spots close us would wise outdoor modelers know something about disease what to avoid what symptoms aware First avoidance cant avoid encounter ing ticks small over place pet owners know However ob serving few precautions can keep ing bitten and/or infected Actions will keep ticks off skin effective preventa tive measures Ticks dwell low shrubbery grass blades get onto shoes kles lower legs crawl upward Wear long pants cinched ankle tucked socks boots less access skin bet ter Check clothing frequently especially youve through field brush retriev ing downed airplane Wearing light-colored clothing makes easier spot little devils Repellents containing Deet can used effec tively clothing shoes pants socks di rect application high concentrations skin advised new product Permanone available may effective Applied clothing both repels kills ticks After day field check feet kles legs attached ticks tick nymphs about size pinhead feeding Any find should removed imme diately fine curved-tip tweezer Grasp tick close possible its mouth part sticking skin pull outward firmly jerking Alternate methods tick re moval alcohol heat vaseline etc popular past have shown less effective good removal fast removal less chance infection Immediately after removing tick disinfect bite rubbing alcohol betadine Unfortunately victims never see tick infects symptoms Lyme dis ease include various types rash may de velop weeks after infection fatigue stiff neck flu-like symptoms headache chills fever muscle aches arthritislike symptoms difficult disease victims recognize doctor diagnose pattern symp toms varies widely case case symptoms mimic other illnesses See doctor symptoms lead suspect have disease Early treatment effec tive Untreated disease progressive can become serious its advanced stages Jesse also sent copy article Lyme disease appeared Consumer Reports June 1988 pages 382-385 Another article disease can found March 1 1989 sue American Nurseryman feature article article states New York Medical College investigating connec tion between Lyme disease multiple sclerosis MS both have similar symptoms alert ticks have safe month Lark/Shepherd Continued page 37 Brads plane scimitar show prop carved piece 2 x 12-in white pine shelving material covered multi ple coats nitrate high-gloss finish painted same white used model Designing building beguiling air plane very satisfying enjoyable Though problems cropped up solving could frustrating times playing Daedelus definitely worth too can have quarter-scale model beauti ful home-builtand fly off work bench instead drawing board Whats wont need cargo van carry flying fieldor contest site En joy building flying unique little Lark Radio Technique/Myers Continued page 41 5 A-in disk Microsoft 9 Sector format usable IBM PCs compatibles Other formats may available need Ask WIMP will ASCII accompanied handbook will have some hints conver sions other computers files disk RC Slope Soaring/Triebes Continued page 47 instant perfection successful flight landing hinting promise things come knew what next couple hand tosses Continued page 144 July 1989 141
Edition: Model Aviation - 1989/07
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 141
NO OCR TEXT NO OCR TEXT aileron servo seen has delib erately installed off-center help counter act weight side-mounted engine Top view stab/elevator showing brace wires terminals registration numbers /4-in Presto vinyl stick-ons desire build own airplane undi minished 1975 Brad began researching home-builder designs As research contacts home builders broadened found himself repeatedly turning good look landing gear mounting ar rangement along spreader bar Note wing strut -in brass mounts behind rear leg screwed l/ x -in spruce strip three-ply fairing holddown block exhaust pipes can seen close-up rudder/elevator assem bly shows -in brass mounts termi nals 030 music wire bottom brace pushrod exit slot rudder horn tail wheel assembly tail wheel homebrew assembly commercial unit appropriate size would serve just well Lark ideal projecta conservative de sign strongly built good performance low power easy fly Brad pur chased set plans went work contacted Ron Darcy help him through much construction process knowing weld en rolled night course community college started practicing scraps 26 Model Aviation Radio equipment stored away aTt ena bay Plans show exact location Author/designer Brad Shepherd Victoria TX Prime Time Only four months after its initial flight tests airplane took top honors October 1988 Scale Rally Austin TX real testament authors design skills craftsmanship piloting ability / Wheel pant installation showing radius pant inside face along two screws going through Sig wheel mount Exhaust stack fittings made -in brass strip high-temp soldered %-in brass tubing pipe engine ex haust other crankcase breather Aluminum-painted fairing witn *s pin heads screwheads closely simulates Polings full-scale Lark wing walk black Coverite Graphic roughed 180 grit no step dry-transfer lettering red striping Coverite Graphic stripes &RITO 65 4- TROK 3/&/4lflPk FIERGLA&Q \ \ - UTPLY Y4&Q&PAR N RPER TORRR N 94x3/8 QPRUCE S fl 8IIEET K \ Xz &HEET K \\\ \$7.iT2 6 7II 7/ ERGLR& CORE Left The right wing panel parts assembled glued up center section excess hasnt cut off yet Right left right panels being attached Note plywood plate over 1/8-in trailing edge rear spar spruce doubler -in sheet between spars Left The left wing tip showing -in WT-2 angle rib -in edge pieces glued 346-in WT-1 Follow plans discrepancy between drawing what see pictures Right fuselage sides being built over plans top other wax paper between best way assure two sides will identical resulting true fuselage assembled 4130 tubing time course completed ready start welding fuselage As quickly realized Brad thrown himself squarely uncompromising world big airplane construction No room Kelehers excellent plans gimmicky Mickey Mouse-type setups tubing sizes large home-built wing spar plenty beefy Brad put lust hellishly stout airplane Two other people deserve credit efforts assisting Brad progressed project A&P mechanic Jim Waiter kept him course lot little things dur ing Brads three-year stint companys headquarters Chicago good friend Larry Pennock made instruments work helped details did finish painting novel departure standard construc tion practice elimination rib stitching wing gluing 1 -in cap strips ribs gluing fabric caps After doping preliminary work including cowling metal parts finished Larry sprayed air craft Du Pont Centauri acrylic enamel turned out glossy Brad has never felt need rub out Since Larry Pinnock flying ex perience elected first flight honors Neither Larry nor Brad flown tail-dragger before both checked out first Super Cub Larry no problems Larks first flight pronounced aircraft real dandy Heres Brads panegyric after first flight Before off end runway Napa knew easy airplane fly Its very stable just outrageously easy handle Landing have such great visibility its hard get really out shape once youre ground rolls out beautifully Its twitchy Since sit centerline fuse lage can instantly detect drift crosswind correct before get trouble Its very very docile air plane During designing drawing build ing phases kept hoping upbeat words about full-scale Larks flight would carry through models charac teristics After six months drawing cut ting gluing fitting refitting redrawing etc finally have answer 28 Model Aviation sides pinned down over plans top view formers F4 F4B glued place along -in balsa gussets turtledeck formers temporarily pinned place will eventually moved shown plans during later phase construction good view showing downward angle sides fuselage being assembled COA3 LINE NOTE F-3A F39 8jITE FTO F 1/LITE PLY SHAPE AT COWL LINE r1IIIIII~ ~T/TGA TA NO NONE F1TFTF-OS3OS3~F NO'j11111111112111111111j12FRRALSA 33 SAD 10 RPL SOTJNEER 5301305ROT 50033025ROTI I25I J 3803/ ON 3/30 ALUMMOPE WM PlATES O EDT3532134A P NE NOflOM H M PLERTAOS ETRP 1/GRALSA S EPOXY WELL PA T8BALOA FOR BA TAT7i74I FE ADOB 32/ELITE PLY FOEBALSA/32NE________ -ROOT -TX P ALL DIAGONALS ARE 11051/0 FAR3/32 TSP ST IPWHEN BITLOING COBIN ON WINO i 05p{3TF-3RTWIU0321145 3 /T6ALUM TOEING POR RADIOS /CFT/BALSAFROM /TAO FINEROLASS 30905 BLOCK SEPT 0 3034313201343132GARDENCITY MI ART3SOIT/ATHEET II3AOFAF-SLIGHT I/O OGlEALLTOPFWTMER STRINGERS----3- ~ .--- -PH ATE STRAIGHTEDGE ALONOOMITTED FOR CLARITYpo--OUTMO 313FT1/A SLOT FOR FIN LA TSP OF FUSE WHEN FITONOFTIAI /I J\----\ ____-AL\ COWL--- IAA32SPRJCEIIAtLIAAT ADA 1341133 CF TM1I"IRLITEFLT- i 33AFLEMLOACTR I TFAR01430 T3F3I1 MTDEET3 3-332353 SUMORAODLU& OF OARLAR -I32433 I332ON-ZYEDMFATMLEI33/tj5 -- - - 33F 3D RRADRTSTOA3-OIMEN32ORIIRLITEPLT 0132FR----- SOARIR IS TSR SAnTA-IRISIM332DTBLFTSTRTT450800KAFMSRRAI MAKE CORRECTION IFIAO1INOAT1IOXT/0 ASEICIIRA/i32ONRLED3T- 3-T13 0t13231R13R001301 ATTACI ~ IRCOCSOSTORI -OCASISESOSFER iCOOCCO I135iCEAT 00033 \-13321 I UtOMOSS STRIP FIREGGLASS COWL &WHEELRRO3TS TAD FIREOGLASS[1fl 30925 RLSCK SEPTAEMARSIDN N TARSEN CITY ML0GT3OIAMNLSOSOENTI33030505BLAB KELEHER LARK K 2 SECTION OF LE PLACE NOEREBOIL MMAIODRS&EFOOT DEL SCALE -3T F a758 SOINPROLAREA-R FOR 00 OTSO POOR SIB ORE 3235 MMI343RDESIG13ED&DRAWNRY BRAS SHEPHERD DARED 0100Mi______________________________________ 323241013 ED43Dis32/33LFM Left Formers Fl 2 3 have inserted side panels glued place along maple engine mount stock slots top stringers former F-2 cut after formers place adjusted straightedge across top three tubing jutting out under engine mount stock attached tank will used smoke system installed later date Right side formers have installed along %2-in balsa sheeting 1/64-in plywood has wrapped around formers F-i F-2 glued place engine mount holes have drilled engine has temporarily installed order fit fiberglass cowl %2-in saddle strip wing opening glued place Note pine landing gear mounts showing through notches cut sides Left The wing has positioned bolted Polyethylene sheet has taped over wing %2-in top strip has pinned place Formers F3A F3B have positioned lined up straightedge before gluing stringers place gluing strip Balsa former F4T has clothespinned place Right Balsa sheet has glued over F3A F3B Former CF has beehi glued along strips F4T lAin sides doublers triangles have glued place %2-in cockpit floor installed Left The %-in balsa sheet has attached CF F4T Note curve transition turtledeck sides under canopy Right layer 1/4in balsa sheet has glued top CF F4T in balsa cap has glued over side assembly June 1988 15 years after Kelehers design truck necessary flight gear turned plane wind let idle first captivated prototype model wing struts bolted along moment always have butterflies Lark ready its maiden flight show prop some picture taking new creation first salutes skies After changing prop fired up 65 excitement wanting see fly June 23 1988 Steen Airstrip south Saito checked rpm began taxiing pretty much kept bay time Texas unloaded Lark pickup Going far end grass strip 430 pm throttled model up 30 Model Aviation EZE2 E3 SORTS/3/TRX 119 TEASELEVATOR1IBO1AlIAWITE -~iLiI- ----ITIRH ELEVATOR TIE BAR 3/3233/8 WEBI/S1/4 IU2SS~ [v32][b-1-10-1-10]]-AU- -------- 3/32/ R6 3/ 32 X 3/6 REAR LARLOOI sItTYR ARTHURACTUAL LAYOUTIUPR STRUT SJLEFT WING T/16 WEB r1-3/TR - r I-I-S4H~ HI 585II ---I- T. 3/16 T/2GU 10- APF--1— ___I------- ___-ijI SOSUT ATTACI4 1/40112 SPRUCE P51 1116 PUTREOHESARE RARLEARLLSHWTH 7RAIRRO 1/AO1/2 SPRUCE A0- ----A-II [v32][b-1-10-1-10]]A REAR SPAR 3/1653/B SPRUCE II 1553/6A 10I ACRE RAREI I1/5015/16 1 SET/RATIFY13/T/IRII/2FIIHR STRAIGHT GRAIN BALSAISLITS PLY 13/THYRIRS 3-ASRIBS 7-6-SI6*LA1~ET54 12EAU129 _CD 7-H CD ALL RIBS 1/B MES C GRAIN BBS 1-2RIBS 6-TO SHY HUT BIRCH PLo 2IEAUZIEG CDCD 1/2 RRTTERN FOB 5440W PROP 1/453/4 1/B SHIMS 2 p1501/2 SPRUCE WIT LIGHT 3/16-801/2 RIBST 7 EIN /jI 16-P W2HRHSRS RR W2T 364 1I AT ATS 250 NOTE rn SALESSE0 KELEHER LARK JK1B SB4GLE PLACE HOSREWIILT MODEL SCALE 3 T BIT/B IAHI IRHRSRHA BA I/B T/BXT/ 3/T601/8 RUDDER 21 401/21/ R-31/R p 3/16EASIDEHAR-S 1/B SHAH FLRTNS WITRRRELHSR TSHSAUIN PROLAREABLBGOZ FOR 60 TONG F STRORE DESIGNED DRAWN BE BRAD SHEPHERD 1/16 VEST WE 1/16 PIT 3/A 3/3203/B ALS Tsp 3/ 32 SHE E 1/801/2/ IHASTRRRHH SORWE 3/16X 3/805-T/2 SPRUCE 3i K 3/IMS TIP 1/16MW I/A S0SRRRU P65441 EDGE OF - 1/SOIIG RIGHT WING RITA GUSSET 3/3203/B WEBBING I7 1/4 / Left Starting rough shape cabin Section under canopy front soft block has fitted curved top sheet top layer -in sheet over CF F4T has roughed out Right Fitting marking canopy final shaping cabin section Left Trimming inside cabin section final shape Note outside has sanded smooth clean joint between cabin turtledeck Also note line fitting canopy Right good view transition turtledeck cabin accom plished careful sanding front F4T photo also shows horizontal stabilizer under left wing construction quite clearly Left Detailing cockpit area 3A6-in dowel tube roll bar has installed start procedure takeoff placard has glued after coating wood roll bar zinc chromate green floor flat black Brad Polings likeness waiting behind right wing Right instrument panel has finished front decking has painted blue 1Ao x -in balsa band simulating fiberglass bow over top instrument panel has installed chromated turtledeck has finished side sheeting com pleted stringers place 3A6-in landing gear fairing core attached landing gear pilot has detailed installed headed down strip playing rud der slightly keep true about 100 ft before touching up eleva tor Lark flying let climb out farther feeding little right aileron trim made 180 turn came back over field moving sticks check re sponse 1800 turn other end brought back Response good entered loop steady-running Saito allowed nice round figure 01 Dad getting elated pulled up 450 climb snapped Doing perfect imitation full-scale Lark would snap stopped wing horizontal still going up 450 After four-point roll vertical climb pushed out slowed stall nosed down about fl0 recovered throttled back got pattern Things going well tell myself get carried away have brain drain very first flight first landing too eager sticks slipped model little out form rocking back forth bounc ing around model flipped last bounce due overcontrolling elevator fortunately no damage except little scuffing canopy worked out better way second flight setting airplane up fairly long ap proach after base keeping low reduced power until crossed edge strip cutting throttle letting settle Dont try three-point landing like did first flight Bring model down its main gear let tail settle slows second flight executed number 32 Model Aviation Left Close-up showing 3A6-in brass tubing rear landing gear strut radius filed ready wrapping soldering Right Building fairing cover landing gear bottom formers F2B F2C have installed sheeted Polyethylene sheet has laid over landing gear attach area former F3C has attached 3/8-in sidepieces pinned ready 1/4-in sheet Left The %-in sheet fill-in between landing gear mounts has installed three-layer Lite Ply fairing mount has attached along bottom stringers Right bottom fairing has sanded round front angular back transitions along bottom Careful sanding shaping will result smooth scalelike appearance photos finished airplane clearly show touch-and-goes taught set model up landing properly second flight demonstrated right power weight Lark will whatever maneuvers pilot capable put through works three-turn spin immediate recovery release nose down about 600 coming out outside snap rolls loops inside snaps top rolls knife-edge flight outside loops slow flybyswith modeling buddy Leon Folse taking pictures heard voice behind propose inverted flyby immediate reaction guy nuts Ive got six months love labor flying around out wants take picture inverted pass second flight same guy egged flying Chips Model Aviation June 1981 inverted test flightand Chips Lark Pleading temporary insanity again gave Leons reckless request got picture want fine-looking quarter-scale model has lot character wont bust budget wont require van trans port good flier look over plans consider Lark Its difficult model build final results wont disappoint Itll major contender Sport Scale Giant Scale contest may want enter youll still have July 1989 33 plywood formers foam block carved shape coat epoxy before applying fiberglass over off cowl lot effort expense recommended because quality cowl along strong 040 butyrate can opy wheel pants now available Tom Keeling T&D Fiberglass Specialties completed model its bare bones stage just prior covering As can seen f ished structure appears very strong airplane capable withstanding heavy use Leader Small Airfoil Technology MAStER AIRSCREW four series choose Master Airscrew offers full line propellers flying application made tough glass-filled nylon superior strength durability G/F SERIES Designed sport flyer G/F Series available 28 popular sizes 5-11 diameters K SERIES K Series designed 4 2 stroke applications Wide undercambered blades provide greater thrust slower turning 4 strokes 8 sizes including new 12 x 8 15 x 10 tips painted safety ANTIQUE SERIES performance series features scimitar shape swept back tips plenty undercamber s suitable application Sizes 12 x 6 13 x 6 14 x 7 16 x 7 new 10 x 5 11 x 6 gold glass-filled nylon 12 x 8 15 x 12 foldIng propellers geared systems 8 selffeathering adjustable pitch prop 05 direct drive give improved thrust glide less drag fixed blade props See Hobby Dealer MASTER AIRSCREW propellers accessories Windsor Propeller Company 384 Tesconi Court Santa Rosa CA 95401 great-looking model super weekend fly ing Construction Wing assure accuracy assem bling wing panels cut out set mas ter ribs /32 ply Mark rib its position panel after its cut out pre clude chance error building Pin piece A-in-sq balsa jig line shown Place 3/6-in shims under front bottom spar pin A-in-sq spar shims Cut small 900 triangle /32 ply use keep ribs vertical install ing spar Install top A-in sq spar pinning place after ribs have pinned A-in-sq jig bottom spar Install /8 x 1 /2-in trailing edge slots ribs satis fied assembly square straight use cyanoacrylate CyA glue joints Gap-filling CyA such Super Jet glue choice takes care irregularities introduced cutting out ribs Install glue %2 x 3A-in aileron spar cap place Pin /8 x %-in leading edge glue place Slide rear 46 x %-in spruce spar place glue Refer picture panel being assembled Cut out %2 x %-in diagonals glue place between ribs Glue /6 vertical-sheet webbing both sides spars Install -in gussets cor ners Sand bevel A-in leading edge conform ribs glue %2in leading edge sheeting place Turn panel over remove shims pin down jig ribs meet board stall leading edge sheeting aileron spar cap both panels have completed lay flat surface have drawn straight line over 70 long use piece Celotex job Pin panels down bottom spar along drawn line Use aliphatic resin epoxy glue rear spar spruce joiner spar stubs Clamp clothespins until dry Glue /8 x 1 in Lite Ply trailing edge joiner top trailing edges Glue x 7A x 6/2-in spar joiner tween main spars Epoxy x 1% x 6in ply joiner rear spars center section Glue x %-in leading edge halves together Glue %2 sheeting top center section aft spars Remove wing bench Glue aileron cranks place crank mounted Install V16 music wire pushrods Sheet bottom center section Note offset position aileron servo help ful counteracting weight sidemounted engine unnecessary twin cylinder Sand front leading edge sheeting flush /8 x 3A-in lead ing edge glue /8 x -in cap place Razor plane course-sand lead ing edge rounded shape Cut tips 3/6-in lightweight sheet balsa using WT- 1 rib outline Cut 34 Model Aviation ELECTRIC SERIES HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP WT-2 rib %-in sheet two WT-3 WT-4 lightweight -in sheet Glue WT-2 place shown glue tip WT- 1 position bot tom edge lining up bottom A-in leading edge bottom trailing edge rib No 10 Note photo tip parts assembled wing Disregard WT-5 piece photo using two pieces WT-4 instead per plan Sand WT-3 pieces conform No 10 rib glue Y32in tip sheeting place Sand tip rounded shape per cross section dia gram WT-2 Build ailerons directly over plans after installing ribs onto /8 x 1-in trailing edge lining up Tail surfaces Cut outlines shape glu ing x -in spars together make /2-in sandwich method construc tion reduces chance warped spars caused using solid -in piece Notch spars assemble surfaces over plans sandwich-type construction elevator rudder results very strong lightweight structure appears realistic covered Install hinges finished fuselage built using one-side-ontop-of-the-other routine After Lite Ply doubler A-in balsa sides have cut out glued together insert waxed paper between sides build directly over plan Dont forget gluing up ply balsa forward side pieces have both right side left Con tact cement used pieces prototype CyA applied around edges Separate sides finished pin down over top view former F-4 tail post Trial fit F-4 trim needed Check fit F4-B sand angle bottom snug fit F-4 Cut temporary angles scrap balsa pin place behind F-4 loca tion Epoxy F-4 place epoxy F4-B top F-4 positioned against gles Use 900 angle get tail post square glue sides together Cut aft fuselage crosspieces place over plan noting difference width top bottom shown photos plans Again discrepan cies show up between photos plans always follow plans reflect changes made after photos taken Glue /8 x -in diagonals place shown top view Pin F-5 F-6 position trial fit stringers straightness Pin F-7 place trial fit /6 x 3A-in top longerons Trim form ers necessary good fit Glue stringers formers longerons place Place F-i slots sides pull sides together using rubberband lock F-t Slide former F-3 place pinning bottom sides securely will pull meet F-3 firmly youre satisfied fit DWBRO TRIPSPIN KEEPS YOU IN Quick easy assemble Universal Designed balance items listed above special accessories Strong stable durable balancing wheels recessed prevent damage accidently dropped Du-Bros Tm- Spin prop balancer adjustable vertically horizontally conform balancing need Truly precision instrument built modelers expect very best Available now local hobby shop BALANCES AIRPLANE PROPSALL SIZES JET FANS BOAT PROPS HELICOPTER ROTOR HEADS SPINNERS CAR WHEELS AND MOTOR GEARS DU-BRO PRODUCTS INC 480 Bonner Road onda IL 60084 July 1989 35 BALANCE Specially designed locking cone securely centers locks props onto balancing shaft utmost accuracy PRECISION MODEL PRODUCTS pa USA BARSTOCK ALUMINUM SPINNERS Pan NoSize TI-iSO-B 112 TT-175-8 /4 TT-200-B 11-225-B .. 2-1/4 11-226-B 1/4 FAt 11-250-B .. 2-1/2 11-251-B .. 2-1/2FAI 75-B 3/4 11-276-B 3/4 FAI .. 11-300-B 11-301-B FAll 11-325-B -1/4 11-350-B -1/2 11-375-B /4 00-B 4 RetailApprox PriceWeight $1395058 oz 1495095oz 1595100oz 1695160oz 1895150ez 1895190oz 2095170oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz S99S520 oz 6995S70 oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner Part NoSize 11-140-A .1/4-28 11-147-A 1/4-28/7mm 11-610-A6 x 1 0mm 11-710-A-7 x 1 0mm 11-516-A5/16-24 11-516-A5/16-24/8mm 11-810-A8x 10mm 11-825-A8x 125mm 11-375-A3/8-24 11-125-AlOx 125mm RetailApprox PriceWeight S495 . 061 oz 495 . z 495 . 063 oz 495 . oz 4950 76 oz 495076oz 495076oz 495075oz 595117oz 595115ox 3 Pieces Nut Washer aird Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 squareness epoxy F-3 position Glue A-in Lite Ply fuel tank base former F-2 keeping 900 former Check fit maple engine mounts through F-i F-2 F-3 choose use firewall commercial mount omit cut outs formers keep same center lines installing mount F- 1 Remove F-l F-2 structure Install fuel tank base former F2 Position F-2 slots pull sides gether rubberband install F-i slots Install engine mount pieces through holes epoxy formers maple stock Use CyA hold tank place silicone can used later final tank installation Stuff piece foam around fuel tank tubing outlet hole F1 epoxy seal off fuel-proof firewall smoker tank installed proto type future use Disregard photos showing tank tubing outlets unless also want include model Re move fuselage structure plans Glue A-in-sq spruce slots top formers F- 1 F-2 F-3 Lay / x A-in stringers place over F-i F-3 cut slots F-2 receive glue place Note photo stringers installed Glue F2-S F35 F3B-S sides Glue -in pine landing gear mounts place us ing liberal amounts epoxy Cut 4, ply sheeting over F-i F-2 using pattern plans Note grain make easier wrap around formers photos shows sheet ing place %2 balsa sheeting being installed behind ply Glue spruce cowl hold-down blocks place flush ply against F-2 Glue %2-in wing saddle strips place Glue FB Lite Ply pieces doublers F-3 Glue % x 3A-in maple blocks wing hold-downs FB F3 using epoxy Epoxy WM Lite Ply pieces fuselage % x 3A-in ma ple block underneath Place wing saddle pin place temporarily lining up trailing edge center centerline former F4B Square wing fuselage mea suring tail post No 10 rib trailing edge Pin firmly drill rear hold-down bolt hole using Y6-in bit Re move wing drill enlarge Y16-in hole wing trailing edge in Tap maple block 4-20 threads Reinstall wing bolt down trail ing edge Square wing again pin firmly Drill front hole fit piece Y16-in dowel Drill matching hole remove wing enlarge both wing holes 14 tap maple blocks /4 -20 Bolt wing place lay sheet polyethylene over wing center section shown photo Again referring photos pin top %2-in balsa strips place wing between F-3 F4-B Pin F3-A place checking fit against F3 Pin F3-B place checking fit straightedge F3-B forward F-2 ensure continuity top sheeting Sand trim necessary Install A-in-sq top balsa stringer two side / x A-in stringers shown photos Cut off rear portion top cabin strip F3-B F-4 Cut cabin cockpit sides lightweight -in sheet balsa using outline side view plan former F3-B CF Cut front rear h-in sheet doublers lightweight stock using cabin side pattern Glue place making right left side Glue lightweight 34-in trian gle stock top edge sides re ferring photos Draw lines polyethylene sheet former F3-B F4-B felt-tip pen Pin sides lines pin former CF back sides Place F4T against F4-B holding clothespin temporarily shown photo Glue two pieces / x 3A-in stock between CF F4-T two A-in pieces substi tuted single A-in piece glue line can used reference point shaping cabin area Glue sides CF F3-B Glue %-in side sheet between CF F4-T wetting wood fit curve neces sary Glue A-in sheet doubler side sheet Glue x 1-in cap top side Glue two-piece A-in sheet top CF aft F4-T per photo Glue %2-in sheet cabin floor place checking fits well sides Glue 34 x 1 /2-in soft block piece sides front F3-B sanding insides fit curve sheeting Rough cut exterior sides using pattern shown plans Refer photo showing desired shape soft block front Rough sand bumps out cabin area sides taking care dig wing sheeting Sheet sides F4-B aft tail post Remove cabin area polyethy lene sheet plan Make cutouts F3-A hold-down blocks lo cated Epoxy maple blocks F-3 epoxy piece /e-in Lite Ply inside %2in side sheeting blocks meet Drill through sheet blocks tap latter 4-40 bolts Enlarge hole side sheet 4-40 bolt well Glue -in top sheet turtleback place glue ply hold-down plate A-in dowel top cabin sheet Drill through dowel ply enlarge ply hole insert blind nut Screw cabin structure onto fuselage assembly Fair cabin areas side sheeting using 180-grit paper little patience careful sanding will make nice smooth transition turtle hump cabin area Place canopy over cabin structure trimming good fit along glue line Mark canopy outline pen carve inside area about A-in thickness sharp knife finish sandpaper hardest part building 36 Model Aviation PROP NUT ADAPTORS V model finished can now take fun break doll up cockpit floor painted flat black sides green zinc chromate color headache rack built using piece 3A6-in alumi num tubing top radius 346-in doweling painted zinc chromate re mainder instrument panel painted almond color shown detail color photos Mask off paint sheeting over front cockpit same blue will used final exterior finish prototype used Red Devil polyurethane Empire Blue Sigs Blue Sky Bright also close color Polings full-scale Lark simulate fiberglass band fullsize plane piece 46-thick %-in wide balsa laid across top curved glued ends painted chromate Williams 3-in-scale sport pilot used dressed up piece balsa block glued bottom shaped raise pilot proper height parachute painted red match red shoelaces used straps shoulder straps black shoelaces Starting Before Takeoff placard shown photo finished cockpit glued wall before gluing canopy canopy tinted hot water black Rit dye careful make too dark Swish canopy around large roasting pan little remove rinse cold water isnt dark enough repeat process until youre satis fied full-scale Lark has just sugges tion tint canopy prototype glued Testors cement green tube variety Any similar model ce ment should work just well Mask off canopy above paint line protect Finishing fuselage Install string ers glue F3-C F2-B F2-C place sheet section i/ x -in spruce strips may glued pine landing gear blocks Install /8-in sheet between blocks fill-in File 346-in brasstubing enclose main landing gear wire wrap soft wire shown plan photo Place gear slots pine blocks holding place screwing three -in brass strips leg using commercial straps Build cover over gear per photos plans Glue three-ply hold block 1A-in sheet balsa fill-in Drill down through fairing block tap block 4-40 bolt Screw fairing place sand ing fit F2-C F3-C formers photos shows foam form shaping cowling using one-off meth od Believe folks aint worth considering cost foam boat glass epoxy hours sanding filling cutting holes etc T&D Fiberglass Specialties fers ready-to-finish cowl sample Tom Keeling sent fit fuselage per fectly would highly recommend purchas ing cowl wheel pants canopy Tom T&D canopy formed 040 material beaut requiring slight trimming perfect fit tried mold canopy 15 times before finally giv ing up easier cover tail surfaces before installing fuselage Sig Koverall nitrate dope used model excellent results After bolting wing slip stabi lizer place ensuring its square trailing edge wing level wing Make certain stabilizer true before gluing place Slip el evator used Klett pinpoint hinges secur ing aliphatic resin Install fin its slot squaring tail post us ing 900 angles side assure square ness stab Make up tail wheel assembly glue place use commercial assemblies securing ply plate epoxied fuselage bottom Install rudder glue hinges prototype given two coats ni trate dope wherever Koverall met structurethat ribs leading edge sheet tips trailing edge fuselage stringers front sheeting turtledeck sheeting Af ter sanding 220-grit paper Koverall installed brushing nitrate through material contact points iron set medium heat beauty taut covering immediately apparent magic Thats uppers building stick-and-rag models Five coats thinned nitrate brushed entire model coat thinned nitrate mixed talcum powder pure kind starch applied sanded smooth 220 Tri-M-ite followed three coats ni trate sanded 360-grit paper Finally sprayed polyurethane mist coat fol lowed fairly wet doubt could have applied red stripes Coverites Graphic Stripes 6-in sizes right mark scale appearance red ex actly matches color full-scale plane stripes joy apply eliminate masking spraying would otherwise required Theyre no thicker coat paint have beau tiful gloss Prime Time lettering Polings name hand painted 0-size long haired sable brush using Sig Skybright Yel low bottom half mixing red create orange top half reg istration numbers letters -in Hel vetica No 411 Presto Stik Vinyl letters found office supply stores Use 030-in music wire wire brac ing tail feathers %-in length %2in brass tubing flattened end drilled hole soldered wire No 2 screws used hold brac ing through holes drilled hardwood mounts ply reinforcements stab fin No 32 straight pins Sig se cured aliphatic resin used sheeted parts simulate Dzuz fasteners PK screws driven metal Continued page 141 New Rocket Uses B C andD Engines. Capability No Else Offers MRC s recent introduction 25 Moonbiaster inter mediate kit brings yet another technological advance MRCs Computer Aided Designs CAD built carry B4-2 C6-3 engines However Moonbiaster also commercially sold rocket kit includes easy-touse adapter also allows louse powerful Dengines Builtto take blast Moon blaster features large die-cut balsa fins blowmolded nose cone superb space capsule detailing Self stick decals 18chute Send free catalog See full line advanced MRC rockets hobby dealer cant help callus directly MRCe Model Rectifier Corporation 2500 Woodbridge Ave Edison NJ 08817 201 985-7800 July 1989 37 Safety/Preston Continued page 20 types animals including birds Nobody can predict time hot spots 1989 season will since known hot spots close us would wise outdoor modelers know something about disease what to avoid what symptoms aware First avoidance cant avoid encounter ing ticks small over place pet owners know However ob serving few precautions can keep ing bitten and/or infected Actions will keep ticks off skin effective preventa tive measures Ticks dwell low shrubbery grass blades get onto shoes kles lower legs crawl upward Wear long pants cinched ankle tucked socks boots less access skin bet ter Check clothing frequently especially youve through field brush retriev ing downed airplane Wearing light-colored clothing makes easier spot little devils Repellents containing Deet can used effec tively clothing shoes pants socks di rect application high concentrations skin advised new product Permanone available may effective Applied clothing both repels kills ticks After day field check feet kles legs attached ticks tick nymphs about size pinhead feeding Any find should removed imme diately fine curved-tip tweezer Grasp tick close possible its mouth part sticking skin pull outward firmly jerking Alternate methods tick re moval alcohol heat vaseline etc popular past have shown less effective good removal fast removal less chance infection Immediately after removing tick disinfect bite rubbing alcohol betadine Unfortunately victims never see tick infects symptoms Lyme dis ease include various types rash may de velop weeks after infection fatigue stiff neck flu-like symptoms headache chills fever muscle aches arthritislike symptoms difficult disease victims recognize doctor diagnose pattern symp toms varies widely case case symptoms mimic other illnesses See doctor symptoms lead suspect have disease Early treatment effec tive Untreated disease progressive can become serious its advanced stages Jesse also sent copy article Lyme disease appeared Consumer Reports June 1988 pages 382-385 Another article disease can found March 1 1989 sue American Nurseryman feature article article states New York Medical College investigating connec tion between Lyme disease multiple sclerosis MS both have similar symptoms alert ticks have safe month Lark/Shepherd Continued page 37 Brads plane scimitar show prop carved piece 2 x 12-in white pine shelving material covered multi ple coats nitrate high-gloss finish painted same white used model Designing building beguiling air plane very satisfying enjoyable Though problems cropped up solving could frustrating times playing Daedelus definitely worth too can have quarter-scale model beauti ful home-builtand fly off work bench instead drawing board Whats wont need cargo van carry flying fieldor contest site En joy building flying unique little Lark Radio Technique/Myers Continued page 41 5 A-in disk Microsoft 9 Sector format usable IBM PCs compatibles Other formats may available need Ask WIMP will ASCII accompanied handbook will have some hints conver sions other computers files disk RC Slope Soaring/Triebes Continued page 47 instant perfection successful flight landing hinting promise things come knew what next couple hand tosses Continued page 144 July 1989 141
Edition: Model Aviation - 1989/07
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 141
NO OCR TEXT NO OCR TEXT aileron servo seen has delib erately installed off-center help counter act weight side-mounted engine Top view stab/elevator showing brace wires terminals registration numbers /4-in Presto vinyl stick-ons desire build own airplane undi minished 1975 Brad began researching home-builder designs As research contacts home builders broadened found himself repeatedly turning good look landing gear mounting ar rangement along spreader bar Note wing strut -in brass mounts behind rear leg screwed l/ x -in spruce strip three-ply fairing holddown block exhaust pipes can seen close-up rudder/elevator assem bly shows -in brass mounts termi nals 030 music wire bottom brace pushrod exit slot rudder horn tail wheel assembly tail wheel homebrew assembly commercial unit appropriate size would serve just well Lark ideal projecta conservative de sign strongly built good performance low power easy fly Brad pur chased set plans went work contacted Ron Darcy help him through much construction process knowing weld en rolled night course community college started practicing scraps 26 Model Aviation Radio equipment stored away aTt ena bay Plans show exact location Author/designer Brad Shepherd Victoria TX Prime Time Only four months after its initial flight tests airplane took top honors October 1988 Scale Rally Austin TX real testament authors design skills craftsmanship piloting ability / Wheel pant installation showing radius pant inside face along two screws going through Sig wheel mount Exhaust stack fittings made -in brass strip high-temp soldered %-in brass tubing pipe engine ex haust other crankcase breather Aluminum-painted fairing witn *s pin heads screwheads closely simulates Polings full-scale Lark wing walk black Coverite Graphic roughed 180 grit no step dry-transfer lettering red striping Coverite Graphic stripes &RITO 65 4- TROK 3/&/4lflPk FIERGLA&Q \ \ - UTPLY Y4&Q&PAR N RPER TORRR N 94x3/8 QPRUCE S fl 8IIEET K \ Xz &HEET K \\\ \$7.iT2 6 7II 7/ ERGLR& CORE Left The right wing panel parts assembled glued up center section excess hasnt cut off yet Right left right panels being attached Note plywood plate over 1/8-in trailing edge rear spar spruce doubler -in sheet between spars Left The left wing tip showing -in WT-2 angle rib -in edge pieces glued 346-in WT-1 Follow plans discrepancy between drawing what see pictures Right fuselage sides being built over plans top other wax paper between best way assure two sides will identical resulting true fuselage assembled 4130 tubing time course completed ready start welding fuselage As quickly realized Brad thrown himself squarely uncompromising world big airplane construction No room Kelehers excellent plans gimmicky Mickey Mouse-type setups tubing sizes large home-built wing spar plenty beefy Brad put lust hellishly stout airplane Two other people deserve credit efforts assisting Brad progressed project A&P mechanic Jim Waiter kept him course lot little things dur ing Brads three-year stint companys headquarters Chicago good friend Larry Pennock made instruments work helped details did finish painting novel departure standard construc tion practice elimination rib stitching wing gluing 1 -in cap strips ribs gluing fabric caps After doping preliminary work including cowling metal parts finished Larry sprayed air craft Du Pont Centauri acrylic enamel turned out glossy Brad has never felt need rub out Since Larry Pinnock flying ex perience elected first flight honors Neither Larry nor Brad flown tail-dragger before both checked out first Super Cub Larry no problems Larks first flight pronounced aircraft real dandy Heres Brads panegyric after first flight Before off end runway Napa knew easy airplane fly Its very stable just outrageously easy handle Landing have such great visibility its hard get really out shape once youre ground rolls out beautifully Its twitchy Since sit centerline fuse lage can instantly detect drift crosswind correct before get trouble Its very very docile air plane During designing drawing build ing phases kept hoping upbeat words about full-scale Larks flight would carry through models charac teristics After six months drawing cut ting gluing fitting refitting redrawing etc finally have answer 28 Model Aviation sides pinned down over plans top view formers F4 F4B glued place along -in balsa gussets turtledeck formers temporarily pinned place will eventually moved shown plans during later phase construction good view showing downward angle sides fuselage being assembled COA3 LINE NOTE F-3A F39 8jITE FTO F 1/LITE PLY SHAPE AT COWL LINE r1IIIIII~ ~T/TGA TA NO NONE F1TFTF-OS3OS3~F NO'j11111111112111111111j12FRRALSA 33 SAD 10 RPL SOTJNEER 5301305ROT 50033025ROTI I25I J 3803/ ON 3/30 ALUMMOPE WM PlATES O EDT3532134A P NE NOflOM H M PLERTAOS ETRP 1/GRALSA S EPOXY WELL PA T8BALOA FOR BA TAT7i74I FE ADOB 32/ELITE PLY FOEBALSA/32NE________ -ROOT -TX P ALL DIAGONALS ARE 11051/0 FAR3/32 TSP ST IPWHEN BITLOING COBIN ON WINO i 05p{3TF-3RTWIU0321145 3 /T6ALUM TOEING POR RADIOS /CFT/BALSAFROM /TAO FINEROLASS 30905 BLOCK SEPT 0 3034313201343132GARDENCITY MI ART3SOIT/ATHEET II3AOFAF-SLIGHT I/O OGlEALLTOPFWTMER STRINGERS----3- ~ .--- -PH ATE STRAIGHTEDGE ALONOOMITTED FOR CLARITYpo--OUTMO 313FT1/A SLOT FOR FIN LA TSP OF FUSE WHEN FITONOFTIAI /I J\----\ ____-AL\ COWL--- IAA32SPRJCEIIAtLIAAT ADA 1341133 CF TM1I"IRLITEFLT- i 33AFLEMLOACTR I TFAR01430 T3F3I1 MTDEET3 3-332353 SUMORAODLU& OF OARLAR -I32433 I332ON-ZYEDMFATMLEI33/tj5 -- - - 33F 3D RRADRTSTOA3-OIMEN32ORIIRLITEPLT 0132FR----- SOARIR IS TSR SAnTA-IRISIM332DTBLFTSTRTT450800KAFMSRRAI MAKE CORRECTION IFIAO1INOAT1IOXT/0 ASEICIIRA/i32ONRLED3T- 3-T13 0t13231R13R001301 ATTACI ~ IRCOCSOSTORI -OCASISESOSFER iCOOCCO I135iCEAT 00033 \-13321 I UtOMOSS STRIP FIREGGLASS COWL &WHEELRRO3TS TAD FIREOGLASS[1fl 30925 RLSCK SEPTAEMARSIDN N TARSEN CITY ML0GT3OIAMNLSOSOENTI33030505BLAB KELEHER LARK K 2 SECTION OF LE PLACE NOEREBOIL MMAIODRS&EFOOT DEL SCALE -3T F a758 SOINPROLAREA-R FOR 00 OTSO POOR SIB ORE 3235 MMI343RDESIG13ED&DRAWNRY BRAS SHEPHERD DARED 0100Mi______________________________________ 323241013 ED43Dis32/33LFM Left Formers Fl 2 3 have inserted side panels glued place along maple engine mount stock slots top stringers former F-2 cut after formers place adjusted straightedge across top three tubing jutting out under engine mount stock attached tank will used smoke system installed later date Right side formers have installed along %2-in balsa sheeting 1/64-in plywood has wrapped around formers F-i F-2 glued place engine mount holes have drilled engine has temporarily installed order fit fiberglass cowl %2-in saddle strip wing opening glued place Note pine landing gear mounts showing through notches cut sides Left The wing has positioned bolted Polyethylene sheet has taped over wing %2-in top strip has pinned place Formers F3A F3B have positioned lined up straightedge before gluing stringers place gluing strip Balsa former F4T has clothespinned place Right Balsa sheet has glued over F3A F3B Former CF has beehi glued along strips F4T lAin sides doublers triangles have glued place %2-in cockpit floor installed Left The %-in balsa sheet has attached CF F4T Note curve transition turtledeck sides under canopy Right layer 1/4in balsa sheet has glued top CF F4T in balsa cap has glued over side assembly June 1988 15 years after Kelehers design truck necessary flight gear turned plane wind let idle first captivated prototype model wing struts bolted along moment always have butterflies Lark ready its maiden flight show prop some picture taking new creation first salutes skies After changing prop fired up 65 excitement wanting see fly June 23 1988 Steen Airstrip south Saito checked rpm began taxiing pretty much kept bay time Texas unloaded Lark pickup Going far end grass strip 430 pm throttled model up 30 Model Aviation EZE2 E3 SORTS/3/TRX 119 TEASELEVATOR1IBO1AlIAWITE -~iLiI- ----ITIRH ELEVATOR TIE BAR 3/3233/8 WEBI/S1/4 IU2SS~ [v32][b-1-10-1-10]]-AU- -------- 3/32/ R6 3/ 32 X 3/6 REAR LARLOOI sItTYR ARTHURACTUAL LAYOUTIUPR STRUT SJLEFT WING T/16 WEB r1-3/TR - r I-I-S4H~ HI 585II ---I- T. 3/16 T/2GU 10- APF--1— ___I------- ___-ijI SOSUT ATTACI4 1/40112 SPRUCE P51 1116 PUTREOHESARE RARLEARLLSHWTH 7RAIRRO 1/AO1/2 SPRUCE A0- ----A-II [v32][b-1-10-1-10]]A REAR SPAR 3/1653/B SPRUCE II 1553/6A 10I ACRE RAREI I1/5015/16 1 SET/RATIFY13/T/IRII/2FIIHR STRAIGHT GRAIN BALSAISLITS PLY 13/THYRIRS 3-ASRIBS 7-6-SI6*LA1~ET54 12EAU129 _CD 7-H CD ALL RIBS 1/B MES C GRAIN BBS 1-2RIBS 6-TO SHY HUT BIRCH PLo 2IEAUZIEG CDCD 1/2 RRTTERN FOB 5440W PROP 1/453/4 1/B SHIMS 2 p1501/2 SPRUCE WIT LIGHT 3/16-801/2 RIBST 7 EIN /jI 16-P W2HRHSRS RR W2T 364 1I AT ATS 250 NOTE rn SALESSE0 KELEHER LARK JK1B SB4GLE PLACE HOSREWIILT MODEL SCALE 3 T BIT/B IAHI IRHRSRHA BA I/B T/BXT/ 3/T601/8 RUDDER 21 401/21/ R-31/R p 3/16EASIDEHAR-S 1/B SHAH FLRTNS WITRRRELHSR TSHSAUIN PROLAREABLBGOZ FOR 60 TONG F STRORE DESIGNED DRAWN BE BRAD SHEPHERD 1/16 VEST WE 1/16 PIT 3/A 3/3203/B ALS Tsp 3/ 32 SHE E 1/801/2/ IHASTRRRHH SORWE 3/16X 3/805-T/2 SPRUCE 3i K 3/IMS TIP 1/16MW I/A S0SRRRU P65441 EDGE OF - 1/SOIIG RIGHT WING RITA GUSSET 3/3203/B WEBBING I7 1/4 / Left Starting rough shape cabin Section under canopy front soft block has fitted curved top sheet top layer -in sheet over CF F4T has roughed out Right Fitting marking canopy final shaping cabin section Left Trimming inside cabin section final shape Note outside has sanded smooth clean joint between cabin turtledeck Also note line fitting canopy Right good view transition turtledeck cabin accom plished careful sanding front F4T photo also shows horizontal stabilizer under left wing construction quite clearly Left Detailing cockpit area 3A6-in dowel tube roll bar has installed start procedure takeoff placard has glued after coating wood roll bar zinc chromate green floor flat black Brad Polings likeness waiting behind right wing Right instrument panel has finished front decking has painted blue 1Ao x -in balsa band simulating fiberglass bow over top instrument panel has installed chromated turtledeck has finished side sheeting com pleted stringers place 3A6-in landing gear fairing core attached landing gear pilot has detailed installed headed down strip playing rud der slightly keep true about 100 ft before touching up eleva tor Lark flying let climb out farther feeding little right aileron trim made 180 turn came back over field moving sticks check re sponse 1800 turn other end brought back Response good entered loop steady-running Saito allowed nice round figure 01 Dad getting elated pulled up 450 climb snapped Doing perfect imitation full-scale Lark would snap stopped wing horizontal still going up 450 After four-point roll vertical climb pushed out slowed stall nosed down about fl0 recovered throttled back got pattern Things going well tell myself get carried away have brain drain very first flight first landing too eager sticks slipped model little out form rocking back forth bounc ing around model flipped last bounce due overcontrolling elevator fortunately no damage except little scuffing canopy worked out better way second flight setting airplane up fairly long ap proach after base keeping low reduced power until crossed edge strip cutting throttle letting settle Dont try three-point landing like did first flight Bring model down its main gear let tail settle slows second flight executed number 32 Model Aviation Left Close-up showing 3A6-in brass tubing rear landing gear strut radius filed ready wrapping soldering Right Building fairing cover landing gear bottom formers F2B F2C have installed sheeted Polyethylene sheet has laid over landing gear attach area former F3C has attached 3/8-in sidepieces pinned ready 1/4-in sheet Left The %-in sheet fill-in between landing gear mounts has installed three-layer Lite Ply fairing mount has attached along bottom stringers Right bottom fairing has sanded round front angular back transitions along bottom Careful sanding shaping will result smooth scalelike appearance photos finished airplane clearly show touch-and-goes taught set model up landing properly second flight demonstrated right power weight Lark will whatever maneuvers pilot capable put through works three-turn spin immediate recovery release nose down about 600 coming out outside snap rolls loops inside snaps top rolls knife-edge flight outside loops slow flybyswith modeling buddy Leon Folse taking pictures heard voice behind propose inverted flyby immediate reaction guy nuts Ive got six months love labor flying around out wants take picture inverted pass second flight same guy egged flying Chips Model Aviation June 1981 inverted test flightand Chips Lark Pleading temporary insanity again gave Leons reckless request got picture want fine-looking quarter-scale model has lot character wont bust budget wont require van trans port good flier look over plans consider Lark Its difficult model build final results wont disappoint Itll major contender Sport Scale Giant Scale contest may want enter youll still have July 1989 33 plywood formers foam block carved shape coat epoxy before applying fiberglass over off cowl lot effort expense recommended because quality cowl along strong 040 butyrate can opy wheel pants now available Tom Keeling T&D Fiberglass Specialties completed model its bare bones stage just prior covering As can seen f ished structure appears very strong airplane capable withstanding heavy use Leader Small Airfoil Technology MAStER AIRSCREW four series choose Master Airscrew offers full line propellers flying application made tough glass-filled nylon superior strength durability G/F SERIES Designed sport flyer G/F Series available 28 popular sizes 5-11 diameters K SERIES K Series designed 4 2 stroke applications Wide undercambered blades provide greater thrust slower turning 4 strokes 8 sizes including new 12 x 8 15 x 10 tips painted safety ANTIQUE SERIES performance series features scimitar shape swept back tips plenty undercamber s suitable application Sizes 12 x 6 13 x 6 14 x 7 16 x 7 new 10 x 5 11 x 6 gold glass-filled nylon 12 x 8 15 x 12 foldIng propellers geared systems 8 selffeathering adjustable pitch prop 05 direct drive give improved thrust glide less drag fixed blade props See Hobby Dealer MASTER AIRSCREW propellers accessories Windsor Propeller Company 384 Tesconi Court Santa Rosa CA 95401 great-looking model super weekend fly ing Construction Wing assure accuracy assem bling wing panels cut out set mas ter ribs /32 ply Mark rib its position panel after its cut out pre clude chance error building Pin piece A-in-sq balsa jig line shown Place 3/6-in shims under front bottom spar pin A-in-sq spar shims Cut small 900 triangle /32 ply use keep ribs vertical install ing spar Install top A-in sq spar pinning place after ribs have pinned A-in-sq jig bottom spar Install /8 x 1 /2-in trailing edge slots ribs satis fied assembly square straight use cyanoacrylate CyA glue joints Gap-filling CyA such Super Jet glue choice takes care irregularities introduced cutting out ribs Install glue %2 x 3A-in aileron spar cap place Pin /8 x %-in leading edge glue place Slide rear 46 x %-in spruce spar place glue Refer picture panel being assembled Cut out %2 x %-in diagonals glue place between ribs Glue /6 vertical-sheet webbing both sides spars Install -in gussets cor ners Sand bevel A-in leading edge conform ribs glue %2in leading edge sheeting place Turn panel over remove shims pin down jig ribs meet board stall leading edge sheeting aileron spar cap both panels have completed lay flat surface have drawn straight line over 70 long use piece Celotex job Pin panels down bottom spar along drawn line Use aliphatic resin epoxy glue rear spar spruce joiner spar stubs Clamp clothespins until dry Glue /8 x 1 in Lite Ply trailing edge joiner top trailing edges Glue x 7A x 6/2-in spar joiner tween main spars Epoxy x 1% x 6in ply joiner rear spars center section Glue x %-in leading edge halves together Glue %2 sheeting top center section aft spars Remove wing bench Glue aileron cranks place crank mounted Install V16 music wire pushrods Sheet bottom center section Note offset position aileron servo help ful counteracting weight sidemounted engine unnecessary twin cylinder Sand front leading edge sheeting flush /8 x 3A-in lead ing edge glue /8 x -in cap place Razor plane course-sand lead ing edge rounded shape Cut tips 3/6-in lightweight sheet balsa using WT- 1 rib outline Cut 34 Model Aviation ELECTRIC SERIES HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP WT-2 rib %-in sheet two WT-3 WT-4 lightweight -in sheet Glue WT-2 place shown glue tip WT- 1 position bot tom edge lining up bottom A-in leading edge bottom trailing edge rib No 10 Note photo tip parts assembled wing Disregard WT-5 piece photo using two pieces WT-4 instead per plan Sand WT-3 pieces conform No 10 rib glue Y32in tip sheeting place Sand tip rounded shape per cross section dia gram WT-2 Build ailerons directly over plans after installing ribs onto /8 x 1-in trailing edge lining up Tail surfaces Cut outlines shape glu ing x -in spars together make /2-in sandwich method construc tion reduces chance warped spars caused using solid -in piece Notch spars assemble surfaces over plans sandwich-type construction elevator rudder results very strong lightweight structure appears realistic covered Install hinges finished fuselage built using one-side-ontop-of-the-other routine After Lite Ply doubler A-in balsa sides have cut out glued together insert waxed paper between sides build directly over plan Dont forget gluing up ply balsa forward side pieces have both right side left Con tact cement used pieces prototype CyA applied around edges Separate sides finished pin down over top view former F-4 tail post Trial fit F-4 trim needed Check fit F4-B sand angle bottom snug fit F-4 Cut temporary angles scrap balsa pin place behind F-4 loca tion Epoxy F-4 place epoxy F4-B top F-4 positioned against gles Use 900 angle get tail post square glue sides together Cut aft fuselage crosspieces place over plan noting difference width top bottom shown photos plans Again discrepan cies show up between photos plans always follow plans reflect changes made after photos taken Glue /8 x -in diagonals place shown top view Pin F-5 F-6 position trial fit stringers straightness Pin F-7 place trial fit /6 x 3A-in top longerons Trim form ers necessary good fit Glue stringers formers longerons place Place F-i slots sides pull sides together using rubberband lock F-t Slide former F-3 place pinning bottom sides securely will pull meet F-3 firmly youre satisfied fit DWBRO TRIPSPIN KEEPS YOU IN Quick easy assemble Universal Designed balance items listed above special accessories Strong stable durable balancing wheels recessed prevent damage accidently dropped Du-Bros Tm- Spin prop balancer adjustable vertically horizontally conform balancing need Truly precision instrument built modelers expect very best Available now local hobby shop BALANCES AIRPLANE PROPSALL SIZES JET FANS BOAT PROPS HELICOPTER ROTOR HEADS SPINNERS CAR WHEELS AND MOTOR GEARS DU-BRO PRODUCTS INC 480 Bonner Road onda IL 60084 July 1989 35 BALANCE Specially designed locking cone securely centers locks props onto balancing shaft utmost accuracy PRECISION MODEL PRODUCTS pa USA BARSTOCK ALUMINUM SPINNERS Pan NoSize TI-iSO-B 112 TT-175-8 /4 TT-200-B 11-225-B .. 2-1/4 11-226-B 1/4 FAt 11-250-B .. 2-1/2 11-251-B .. 2-1/2FAI 75-B 3/4 11-276-B 3/4 FAI .. 11-300-B 11-301-B FAll 11-325-B -1/4 11-350-B -1/2 11-375-B /4 00-B 4 RetailApprox PriceWeight $1395058 oz 1495095oz 1595100oz 1695160oz 1895150ez 1895190oz 2095170oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz S99S520 oz 6995S70 oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner Part NoSize 11-140-A .1/4-28 11-147-A 1/4-28/7mm 11-610-A6 x 1 0mm 11-710-A-7 x 1 0mm 11-516-A5/16-24 11-516-A5/16-24/8mm 11-810-A8x 10mm 11-825-A8x 125mm 11-375-A3/8-24 11-125-AlOx 125mm RetailApprox PriceWeight S495 . 061 oz 495 . z 495 . 063 oz 495 . oz 4950 76 oz 495076oz 495076oz 495075oz 595117oz 595115ox 3 Pieces Nut Washer aird Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 squareness epoxy F-3 position Glue A-in Lite Ply fuel tank base former F-2 keeping 900 former Check fit maple engine mounts through F-i F-2 F-3 choose use firewall commercial mount omit cut outs formers keep same center lines installing mount F- 1 Remove F-l F-2 structure Install fuel tank base former F2 Position F-2 slots pull sides gether rubberband install F-i slots Install engine mount pieces through holes epoxy formers maple stock Use CyA hold tank place silicone can used later final tank installation Stuff piece foam around fuel tank tubing outlet hole F1 epoxy seal off fuel-proof firewall smoker tank installed proto type future use Disregard photos showing tank tubing outlets unless also want include model Re move fuselage structure plans Glue A-in-sq spruce slots top formers F- 1 F-2 F-3 Lay / x A-in stringers place over F-i F-3 cut slots F-2 receive glue place Note photo stringers installed Glue F2-S F35 F3B-S sides Glue -in pine landing gear mounts place us ing liberal amounts epoxy Cut 4, ply sheeting over F-i F-2 using pattern plans Note grain make easier wrap around formers photos shows sheet ing place %2 balsa sheeting being installed behind ply Glue spruce cowl hold-down blocks place flush ply against F-2 Glue %2-in wing saddle strips place Glue FB Lite Ply pieces doublers F-3 Glue % x 3A-in maple blocks wing hold-downs FB F3 using epoxy Epoxy WM Lite Ply pieces fuselage % x 3A-in ma ple block underneath Place wing saddle pin place temporarily lining up trailing edge center centerline former F4B Square wing fuselage mea suring tail post No 10 rib trailing edge Pin firmly drill rear hold-down bolt hole using Y6-in bit Re move wing drill enlarge Y16-in hole wing trailing edge in Tap maple block 4-20 threads Reinstall wing bolt down trail ing edge Square wing again pin firmly Drill front hole fit piece Y16-in dowel Drill matching hole remove wing enlarge both wing holes 14 tap maple blocks /4 -20 Bolt wing place lay sheet polyethylene over wing center section shown photo Again referring photos pin top %2-in balsa strips place wing between F-3 F4-B Pin F3-A place checking fit against F3 Pin F3-B place checking fit straightedge F3-B forward F-2 ensure continuity top sheeting Sand trim necessary Install A-in-sq top balsa stringer two side / x A-in stringers shown photos Cut off rear portion top cabin strip F3-B F-4 Cut cabin cockpit sides lightweight -in sheet balsa using outline side view plan former F3-B CF Cut front rear h-in sheet doublers lightweight stock using cabin side pattern Glue place making right left side Glue lightweight 34-in trian gle stock top edge sides re ferring photos Draw lines polyethylene sheet former F3-B F4-B felt-tip pen Pin sides lines pin former CF back sides Place F4T against F4-B holding clothespin temporarily shown photo Glue two pieces / x 3A-in stock between CF F4-T two A-in pieces substi tuted single A-in piece glue line can used reference point shaping cabin area Glue sides CF F3-B Glue %-in side sheet between CF F4-T wetting wood fit curve neces sary Glue A-in sheet doubler side sheet Glue x 1-in cap top side Glue two-piece A-in sheet top CF aft F4-T per photo Glue %2-in sheet cabin floor place checking fits well sides Glue 34 x 1 /2-in soft block piece sides front F3-B sanding insides fit curve sheeting Rough cut exterior sides using pattern shown plans Refer photo showing desired shape soft block front Rough sand bumps out cabin area sides taking care dig wing sheeting Sheet sides F4-B aft tail post Remove cabin area polyethy lene sheet plan Make cutouts F3-A hold-down blocks lo cated Epoxy maple blocks F-3 epoxy piece /e-in Lite Ply inside %2in side sheeting blocks meet Drill through sheet blocks tap latter 4-40 bolts Enlarge hole side sheet 4-40 bolt well Glue -in top sheet turtleback place glue ply hold-down plate A-in dowel top cabin sheet Drill through dowel ply enlarge ply hole insert blind nut Screw cabin structure onto fuselage assembly Fair cabin areas side sheeting using 180-grit paper little patience careful sanding will make nice smooth transition turtle hump cabin area Place canopy over cabin structure trimming good fit along glue line Mark canopy outline pen carve inside area about A-in thickness sharp knife finish sandpaper hardest part building 36 Model Aviation PROP NUT ADAPTORS V model finished can now take fun break doll up cockpit floor painted flat black sides green zinc chromate color headache rack built using piece 3A6-in alumi num tubing top radius 346-in doweling painted zinc chromate re mainder instrument panel painted almond color shown detail color photos Mask off paint sheeting over front cockpit same blue will used final exterior finish prototype used Red Devil polyurethane Empire Blue Sigs Blue Sky Bright also close color Polings full-scale Lark simulate fiberglass band fullsize plane piece 46-thick %-in wide balsa laid across top curved glued ends painted chromate Williams 3-in-scale sport pilot used dressed up piece balsa block glued bottom shaped raise pilot proper height parachute painted red match red shoelaces used straps shoulder straps black shoelaces Starting Before Takeoff placard shown photo finished cockpit glued wall before gluing canopy canopy tinted hot water black Rit dye careful make too dark Swish canopy around large roasting pan little remove rinse cold water isnt dark enough repeat process until youre satis fied full-scale Lark has just sugges tion tint canopy prototype glued Testors cement green tube variety Any similar model ce ment should work just well Mask off canopy above paint line protect Finishing fuselage Install string ers glue F3-C F2-B F2-C place sheet section i/ x -in spruce strips may glued pine landing gear blocks Install /8-in sheet between blocks fill-in File 346-in brasstubing enclose main landing gear wire wrap soft wire shown plan photo Place gear slots pine blocks holding place screwing three -in brass strips leg using commercial straps Build cover over gear per photos plans Glue three-ply hold block 1A-in sheet balsa fill-in Drill down through fairing block tap block 4-40 bolt Screw fairing place sand ing fit F2-C F3-C formers photos shows foam form shaping cowling using one-off meth od Believe folks aint worth considering cost foam boat glass epoxy hours sanding filling cutting holes etc T&D Fiberglass Specialties fers ready-to-finish cowl sample Tom Keeling sent fit fuselage per fectly would highly recommend purchas ing cowl wheel pants canopy Tom T&D canopy formed 040 material beaut requiring slight trimming perfect fit tried mold canopy 15 times before finally giv ing up easier cover tail surfaces before installing fuselage Sig Koverall nitrate dope used model excellent results After bolting wing slip stabi lizer place ensuring its square trailing edge wing level wing Make certain stabilizer true before gluing place Slip el evator used Klett pinpoint hinges secur ing aliphatic resin Install fin its slot squaring tail post us ing 900 angles side assure square ness stab Make up tail wheel assembly glue place use commercial assemblies securing ply plate epoxied fuselage bottom Install rudder glue hinges prototype given two coats ni trate dope wherever Koverall met structurethat ribs leading edge sheet tips trailing edge fuselage stringers front sheeting turtledeck sheeting Af ter sanding 220-grit paper Koverall installed brushing nitrate through material contact points iron set medium heat beauty taut covering immediately apparent magic Thats uppers building stick-and-rag models Five coats thinned nitrate brushed entire model coat thinned nitrate mixed talcum powder pure kind starch applied sanded smooth 220 Tri-M-ite followed three coats ni trate sanded 360-grit paper Finally sprayed polyurethane mist coat fol lowed fairly wet doubt could have applied red stripes Coverites Graphic Stripes 6-in sizes right mark scale appearance red ex actly matches color full-scale plane stripes joy apply eliminate masking spraying would otherwise required Theyre no thicker coat paint have beau tiful gloss Prime Time lettering Polings name hand painted 0-size long haired sable brush using Sig Skybright Yel low bottom half mixing red create orange top half reg istration numbers letters -in Hel vetica No 411 Presto Stik Vinyl letters found office supply stores Use 030-in music wire wire brac ing tail feathers %-in length %2in brass tubing flattened end drilled hole soldered wire No 2 screws used hold brac ing through holes drilled hardwood mounts ply reinforcements stab fin No 32 straight pins Sig se cured aliphatic resin used sheeted parts simulate Dzuz fasteners PK screws driven metal Continued page 141 New Rocket Uses B C andD Engines. Capability No Else Offers MRC s recent introduction 25 Moonbiaster inter mediate kit brings yet another technological advance MRCs Computer Aided Designs CAD built carry B4-2 C6-3 engines However Moonbiaster also commercially sold rocket kit includes easy-touse adapter also allows louse powerful Dengines Builtto take blast Moon blaster features large die-cut balsa fins blowmolded nose cone superb space capsule detailing Self stick decals 18chute Send free catalog See full line advanced MRC rockets hobby dealer cant help callus directly MRCe Model Rectifier Corporation 2500 Woodbridge Ave Edison NJ 08817 201 985-7800 July 1989 37 Safety/Preston Continued page 20 types animals including birds Nobody can predict time hot spots 1989 season will since known hot spots close us would wise outdoor modelers know something about disease what to avoid what symptoms aware First avoidance cant avoid encounter ing ticks small over place pet owners know However ob serving few precautions can keep ing bitten and/or infected Actions will keep ticks off skin effective preventa tive measures Ticks dwell low shrubbery grass blades get onto shoes kles lower legs crawl upward Wear long pants cinched ankle tucked socks boots less access skin bet ter Check clothing frequently especially youve through field brush retriev ing downed airplane Wearing light-colored clothing makes easier spot little devils Repellents containing Deet can used effec tively clothing shoes pants socks di rect application high concentrations skin advised new product Permanone available may effective Applied clothing both repels kills ticks After day field check feet kles legs attached ticks tick nymphs about size pinhead feeding Any find should removed imme diately fine curved-tip tweezer Grasp tick close possible its mouth part sticking skin pull outward firmly jerking Alternate methods tick re moval alcohol heat vaseline etc popular past have shown less effective good removal fast removal less chance infection Immediately after removing tick disinfect bite rubbing alcohol betadine Unfortunately victims never see tick infects symptoms Lyme dis ease include various types rash may de velop weeks after infection fatigue stiff neck flu-like symptoms headache chills fever muscle aches arthritislike symptoms difficult disease victims recognize doctor diagnose pattern symp toms varies widely case case symptoms mimic other illnesses See doctor symptoms lead suspect have disease Early treatment effec tive Untreated disease progressive can become serious its advanced stages Jesse also sent copy article Lyme disease appeared Consumer Reports June 1988 pages 382-385 Another article disease can found March 1 1989 sue American Nurseryman feature article article states New York Medical College investigating connec tion between Lyme disease multiple sclerosis MS both have similar symptoms alert ticks have safe month Lark/Shepherd Continued page 37 Brads plane scimitar show prop carved piece 2 x 12-in white pine shelving material covered multi ple coats nitrate high-gloss finish painted same white used model Designing building beguiling air plane very satisfying enjoyable Though problems cropped up solving could frustrating times playing Daedelus definitely worth too can have quarter-scale model beauti ful home-builtand fly off work bench instead drawing board Whats wont need cargo van carry flying fieldor contest site En joy building flying unique little Lark Radio Technique/Myers Continued page 41 5 A-in disk Microsoft 9 Sector format usable IBM PCs compatibles Other formats may available need Ask WIMP will ASCII accompanied handbook will have some hints conver sions other computers files disk RC Slope Soaring/Triebes Continued page 47 instant perfection successful flight landing hinting promise things come knew what next couple hand tosses Continued page 144 July 1989 141
Edition: Model Aviation - 1989/07
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 141
NO OCR TEXT NO OCR TEXT aileron servo seen has delib erately installed off-center help counter act weight side-mounted engine Top view stab/elevator showing brace wires terminals registration numbers /4-in Presto vinyl stick-ons desire build own airplane undi minished 1975 Brad began researching home-builder designs As research contacts home builders broadened found himself repeatedly turning good look landing gear mounting ar rangement along spreader bar Note wing strut -in brass mounts behind rear leg screwed l/ x -in spruce strip three-ply fairing holddown block exhaust pipes can seen close-up rudder/elevator assem bly shows -in brass mounts termi nals 030 music wire bottom brace pushrod exit slot rudder horn tail wheel assembly tail wheel homebrew assembly commercial unit appropriate size would serve just well Lark ideal projecta conservative de sign strongly built good performance low power easy fly Brad pur chased set plans went work contacted Ron Darcy help him through much construction process knowing weld en rolled night course community college started practicing scraps 26 Model Aviation Radio equipment stored away aTt ena bay Plans show exact location Author/designer Brad Shepherd Victoria TX Prime Time Only four months after its initial flight tests airplane took top honors October 1988 Scale Rally Austin TX real testament authors design skills craftsmanship piloting ability / Wheel pant installation showing radius pant inside face along two screws going through Sig wheel mount Exhaust stack fittings made -in brass strip high-temp soldered %-in brass tubing pipe engine ex haust other crankcase breather Aluminum-painted fairing witn *s pin heads screwheads closely simulates Polings full-scale Lark wing walk black Coverite Graphic roughed 180 grit no step dry-transfer lettering red striping Coverite Graphic stripes &RITO 65 4- TROK 3/&/4lflPk FIERGLA&Q \ \ - UTPLY Y4&Q&PAR N RPER TORRR N 94x3/8 QPRUCE S fl 8IIEET K \ Xz &HEET K \\\ \$7.iT2 6 7II 7/ ERGLR& CORE Left The right wing panel parts assembled glued up center section excess hasnt cut off yet Right left right panels being attached Note plywood plate over 1/8-in trailing edge rear spar spruce doubler -in sheet between spars Left The left wing tip showing -in WT-2 angle rib -in edge pieces glued 346-in WT-1 Follow plans discrepancy between drawing what see pictures Right fuselage sides being built over plans top other wax paper between best way assure two sides will identical resulting true fuselage assembled 4130 tubing time course completed ready start welding fuselage As quickly realized Brad thrown himself squarely uncompromising world big airplane construction No room Kelehers excellent plans gimmicky Mickey Mouse-type setups tubing sizes large home-built wing spar plenty beefy Brad put lust hellishly stout airplane Two other people deserve credit efforts assisting Brad progressed project A&P mechanic Jim Waiter kept him course lot little things dur ing Brads three-year stint companys headquarters Chicago good friend Larry Pennock made instruments work helped details did finish painting novel departure standard construc tion practice elimination rib stitching wing gluing 1 -in cap strips ribs gluing fabric caps After doping preliminary work including cowling metal parts finished Larry sprayed air craft Du Pont Centauri acrylic enamel turned out glossy Brad has never felt need rub out Since Larry Pinnock flying ex perience elected first flight honors Neither Larry nor Brad flown tail-dragger before both checked out first Super Cub Larry no problems Larks first flight pronounced aircraft real dandy Heres Brads panegyric after first flight Before off end runway Napa knew easy airplane fly Its very stable just outrageously easy handle Landing have such great visibility its hard get really out shape once youre ground rolls out beautifully Its twitchy Since sit centerline fuse lage can instantly detect drift crosswind correct before get trouble Its very very docile air plane During designing drawing build ing phases kept hoping upbeat words about full-scale Larks flight would carry through models charac teristics After six months drawing cut ting gluing fitting refitting redrawing etc finally have answer 28 Model Aviation sides pinned down over plans top view formers F4 F4B glued place along -in balsa gussets turtledeck formers temporarily pinned place will eventually moved shown plans during later phase construction good view showing downward angle sides fuselage being assembled COA3 LINE NOTE F-3A F39 8jITE FTO F 1/LITE PLY SHAPE AT COWL LINE r1IIIIII~ ~T/TGA TA NO NONE F1TFTF-OS3OS3~F NO'j11111111112111111111j12FRRALSA 33 SAD 10 RPL SOTJNEER 5301305ROT 50033025ROTI I25I J 3803/ ON 3/30 ALUMMOPE WM PlATES O EDT3532134A P NE NOflOM H M PLERTAOS ETRP 1/GRALSA S EPOXY WELL PA T8BALOA FOR BA TAT7i74I FE ADOB 32/ELITE PLY FOEBALSA/32NE________ -ROOT -TX P ALL DIAGONALS ARE 11051/0 FAR3/32 TSP ST IPWHEN BITLOING COBIN ON WINO i 05p{3TF-3RTWIU0321145 3 /T6ALUM TOEING POR RADIOS /CFT/BALSAFROM /TAO FINEROLASS 30905 BLOCK SEPT 0 3034313201343132GARDENCITY MI ART3SOIT/ATHEET II3AOFAF-SLIGHT I/O OGlEALLTOPFWTMER STRINGERS----3- ~ .--- -PH ATE STRAIGHTEDGE ALONOOMITTED FOR CLARITYpo--OUTMO 313FT1/A SLOT FOR FIN LA TSP OF FUSE WHEN FITONOFTIAI /I J\----\ ____-AL\ COWL--- IAA32SPRJCEIIAtLIAAT ADA 1341133 CF TM1I"IRLITEFLT- i 33AFLEMLOACTR I TFAR01430 T3F3I1 MTDEET3 3-332353 SUMORAODLU& OF OARLAR -I32433 I332ON-ZYEDMFATMLEI33/tj5 -- - - 33F 3D RRADRTSTOA3-OIMEN32ORIIRLITEPLT 0132FR----- SOARIR IS TSR SAnTA-IRISIM332DTBLFTSTRTT450800KAFMSRRAI MAKE CORRECTION IFIAO1INOAT1IOXT/0 ASEICIIRA/i32ONRLED3T- 3-T13 0t13231R13R001301 ATTACI ~ IRCOCSOSTORI -OCASISESOSFER iCOOCCO I135iCEAT 00033 \-13321 I UtOMOSS STRIP FIREGGLASS COWL &WHEELRRO3TS TAD FIREOGLASS[1fl 30925 RLSCK SEPTAEMARSIDN N TARSEN CITY ML0GT3OIAMNLSOSOENTI33030505BLAB KELEHER LARK K 2 SECTION OF LE PLACE NOEREBOIL MMAIODRS&EFOOT DEL SCALE -3T F a758 SOINPROLAREA-R FOR 00 OTSO POOR SIB ORE 3235 MMI343RDESIG13ED&DRAWNRY BRAS SHEPHERD DARED 0100Mi______________________________________ 323241013 ED43Dis32/33LFM Left Formers Fl 2 3 have inserted side panels glued place along maple engine mount stock slots top stringers former F-2 cut after formers place adjusted straightedge across top three tubing jutting out under engine mount stock attached tank will used smoke system installed later date Right side formers have installed along %2-in balsa sheeting 1/64-in plywood has wrapped around formers F-i F-2 glued place engine mount holes have drilled engine has temporarily installed order fit fiberglass cowl %2-in saddle strip wing opening glued place Note pine landing gear mounts showing through notches cut sides Left The wing has positioned bolted Polyethylene sheet has taped over wing %2-in top strip has pinned place Formers F3A F3B have positioned lined up straightedge before gluing stringers place gluing strip Balsa former F4T has clothespinned place Right Balsa sheet has glued over F3A F3B Former CF has beehi glued along strips F4T lAin sides doublers triangles have glued place %2-in cockpit floor installed Left The %-in balsa sheet has attached CF F4T Note curve transition turtledeck sides under canopy Right layer 1/4in balsa sheet has glued top CF F4T in balsa cap has glued over side assembly June 1988 15 years after Kelehers design truck necessary flight gear turned plane wind let idle first captivated prototype model wing struts bolted along moment always have butterflies Lark ready its maiden flight show prop some picture taking new creation first salutes skies After changing prop fired up 65 excitement wanting see fly June 23 1988 Steen Airstrip south Saito checked rpm began taxiing pretty much kept bay time Texas unloaded Lark pickup Going far end grass strip 430 pm throttled model up 30 Model Aviation EZE2 E3 SORTS/3/TRX 119 TEASELEVATOR1IBO1AlIAWITE -~iLiI- ----ITIRH ELEVATOR TIE BAR 3/3233/8 WEBI/S1/4 IU2SS~ [v32][b-1-10-1-10]]-AU- -------- 3/32/ R6 3/ 32 X 3/6 REAR LARLOOI sItTYR ARTHURACTUAL LAYOUTIUPR STRUT SJLEFT WING T/16 WEB r1-3/TR - r I-I-S4H~ HI 585II ---I- T. 3/16 T/2GU 10- APF--1— ___I------- ___-ijI SOSUT ATTACI4 1/40112 SPRUCE P51 1116 PUTREOHESARE RARLEARLLSHWTH 7RAIRRO 1/AO1/2 SPRUCE A0- ----A-II [v32][b-1-10-1-10]]A REAR SPAR 3/1653/B SPRUCE II 1553/6A 10I ACRE RAREI I1/5015/16 1 SET/RATIFY13/T/IRII/2FIIHR STRAIGHT GRAIN BALSAISLITS PLY 13/THYRIRS 3-ASRIBS 7-6-SI6*LA1~ET54 12EAU129 _CD 7-H CD ALL RIBS 1/B MES C GRAIN BBS 1-2RIBS 6-TO SHY HUT BIRCH PLo 2IEAUZIEG CDCD 1/2 RRTTERN FOB 5440W PROP 1/453/4 1/B SHIMS 2 p1501/2 SPRUCE WIT LIGHT 3/16-801/2 RIBST 7 EIN /jI 16-P W2HRHSRS RR W2T 364 1I AT ATS 250 NOTE rn SALESSE0 KELEHER LARK JK1B SB4GLE PLACE HOSREWIILT MODEL SCALE 3 T BIT/B IAHI IRHRSRHA BA I/B T/BXT/ 3/T601/8 RUDDER 21 401/21/ R-31/R p 3/16EASIDEHAR-S 1/B SHAH FLRTNS WITRRRELHSR TSHSAUIN PROLAREABLBGOZ FOR 60 TONG F STRORE DESIGNED DRAWN BE BRAD SHEPHERD 1/16 VEST WE 1/16 PIT 3/A 3/3203/B ALS Tsp 3/ 32 SHE E 1/801/2/ IHASTRRRHH SORWE 3/16X 3/805-T/2 SPRUCE 3i K 3/IMS TIP 1/16MW I/A S0SRRRU P65441 EDGE OF - 1/SOIIG RIGHT WING RITA GUSSET 3/3203/B WEBBING I7 1/4 / Left Starting rough shape cabin Section under canopy front soft block has fitted curved top sheet top layer -in sheet over CF F4T has roughed out Right Fitting marking canopy final shaping cabin section Left Trimming inside cabin section final shape Note outside has sanded smooth clean joint between cabin turtledeck Also note line fitting canopy Right good view transition turtledeck cabin accom plished careful sanding front F4T photo also shows horizontal stabilizer under left wing construction quite clearly Left Detailing cockpit area 3A6-in dowel tube roll bar has installed start procedure takeoff placard has glued after coating wood roll bar zinc chromate green floor flat black Brad Polings likeness waiting behind right wing Right instrument panel has finished front decking has painted blue 1Ao x -in balsa band simulating fiberglass bow over top instrument panel has installed chromated turtledeck has finished side sheeting com pleted stringers place 3A6-in landing gear fairing core attached landing gear pilot has detailed installed headed down strip playing rud der slightly keep true about 100 ft before touching up eleva tor Lark flying let climb out farther feeding little right aileron trim made 180 turn came back over field moving sticks check re sponse 1800 turn other end brought back Response good entered loop steady-running Saito allowed nice round figure 01 Dad getting elated pulled up 450 climb snapped Doing perfect imitation full-scale Lark would snap stopped wing horizontal still going up 450 After four-point roll vertical climb pushed out slowed stall nosed down about fl0 recovered throttled back got pattern Things going well tell myself get carried away have brain drain very first flight first landing too eager sticks slipped model little out form rocking back forth bounc ing around model flipped last bounce due overcontrolling elevator fortunately no damage except little scuffing canopy worked out better way second flight setting airplane up fairly long ap proach after base keeping low reduced power until crossed edge strip cutting throttle letting settle Dont try three-point landing like did first flight Bring model down its main gear let tail settle slows second flight executed number 32 Model Aviation Left Close-up showing 3A6-in brass tubing rear landing gear strut radius filed ready wrapping soldering Right Building fairing cover landing gear bottom formers F2B F2C have installed sheeted Polyethylene sheet has laid over landing gear attach area former F3C has attached 3/8-in sidepieces pinned ready 1/4-in sheet Left The %-in sheet fill-in between landing gear mounts has installed three-layer Lite Ply fairing mount has attached along bottom stringers Right bottom fairing has sanded round front angular back transitions along bottom Careful sanding shaping will result smooth scalelike appearance photos finished airplane clearly show touch-and-goes taught set model up landing properly second flight demonstrated right power weight Lark will whatever maneuvers pilot capable put through works three-turn spin immediate recovery release nose down about 600 coming out outside snap rolls loops inside snaps top rolls knife-edge flight outside loops slow flybyswith modeling buddy Leon Folse taking pictures heard voice behind propose inverted flyby immediate reaction guy nuts Ive got six months love labor flying around out wants take picture inverted pass second flight same guy egged flying Chips Model Aviation June 1981 inverted test flightand Chips Lark Pleading temporary insanity again gave Leons reckless request got picture want fine-looking quarter-scale model has lot character wont bust budget wont require van trans port good flier look over plans consider Lark Its difficult model build final results wont disappoint Itll major contender Sport Scale Giant Scale contest may want enter youll still have July 1989 33 plywood formers foam block carved shape coat epoxy before applying fiberglass over off cowl lot effort expense recommended because quality cowl along strong 040 butyrate can opy wheel pants now available Tom Keeling T&D Fiberglass Specialties completed model its bare bones stage just prior covering As can seen f ished structure appears very strong airplane capable withstanding heavy use Leader Small Airfoil Technology MAStER AIRSCREW four series choose Master Airscrew offers full line propellers flying application made tough glass-filled nylon superior strength durability G/F SERIES Designed sport flyer G/F Series available 28 popular sizes 5-11 diameters K SERIES K Series designed 4 2 stroke applications Wide undercambered blades provide greater thrust slower turning 4 strokes 8 sizes including new 12 x 8 15 x 10 tips painted safety ANTIQUE SERIES performance series features scimitar shape swept back tips plenty undercamber s suitable application Sizes 12 x 6 13 x 6 14 x 7 16 x 7 new 10 x 5 11 x 6 gold glass-filled nylon 12 x 8 15 x 12 foldIng propellers geared systems 8 selffeathering adjustable pitch prop 05 direct drive give improved thrust glide less drag fixed blade props See Hobby Dealer MASTER AIRSCREW propellers accessories Windsor Propeller Company 384 Tesconi Court Santa Rosa CA 95401 great-looking model super weekend fly ing Construction Wing assure accuracy assem bling wing panels cut out set mas ter ribs /32 ply Mark rib its position panel after its cut out pre clude chance error building Pin piece A-in-sq balsa jig line shown Place 3/6-in shims under front bottom spar pin A-in-sq spar shims Cut small 900 triangle /32 ply use keep ribs vertical install ing spar Install top A-in sq spar pinning place after ribs have pinned A-in-sq jig bottom spar Install /8 x 1 /2-in trailing edge slots ribs satis fied assembly square straight use cyanoacrylate CyA glue joints Gap-filling CyA such Super Jet glue choice takes care irregularities introduced cutting out ribs Install glue %2 x 3A-in aileron spar cap place Pin /8 x %-in leading edge glue place Slide rear 46 x %-in spruce spar place glue Refer picture panel being assembled Cut out %2 x %-in diagonals glue place between ribs Glue /6 vertical-sheet webbing both sides spars Install -in gussets cor ners Sand bevel A-in leading edge conform ribs glue %2in leading edge sheeting place Turn panel over remove shims pin down jig ribs meet board stall leading edge sheeting aileron spar cap both panels have completed lay flat surface have drawn straight line over 70 long use piece Celotex job Pin panels down bottom spar along drawn line Use aliphatic resin epoxy glue rear spar spruce joiner spar stubs Clamp clothespins until dry Glue /8 x 1 in Lite Ply trailing edge joiner top trailing edges Glue x 7A x 6/2-in spar joiner tween main spars Epoxy x 1% x 6in ply joiner rear spars center section Glue x %-in leading edge halves together Glue %2 sheeting top center section aft spars Remove wing bench Glue aileron cranks place crank mounted Install V16 music wire pushrods Sheet bottom center section Note offset position aileron servo help ful counteracting weight sidemounted engine unnecessary twin cylinder Sand front leading edge sheeting flush /8 x 3A-in lead ing edge glue /8 x -in cap place Razor plane course-sand lead ing edge rounded shape Cut tips 3/6-in lightweight sheet balsa using WT- 1 rib outline Cut 34 Model Aviation ELECTRIC SERIES HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP WT-2 rib %-in sheet two WT-3 WT-4 lightweight -in sheet Glue WT-2 place shown glue tip WT- 1 position bot tom edge lining up bottom A-in leading edge bottom trailing edge rib No 10 Note photo tip parts assembled wing Disregard WT-5 piece photo using two pieces WT-4 instead per plan Sand WT-3 pieces conform No 10 rib glue Y32in tip sheeting place Sand tip rounded shape per cross section dia gram WT-2 Build ailerons directly over plans after installing ribs onto /8 x 1-in trailing edge lining up Tail surfaces Cut outlines shape glu ing x -in spars together make /2-in sandwich method construc tion reduces chance warped spars caused using solid -in piece Notch spars assemble surfaces over plans sandwich-type construction elevator rudder results very strong lightweight structure appears realistic covered Install hinges finished fuselage built using one-side-ontop-of-the-other routine After Lite Ply doubler A-in balsa sides have cut out glued together insert waxed paper between sides build directly over plan Dont forget gluing up ply balsa forward side pieces have both right side left Con tact cement used pieces prototype CyA applied around edges Separate sides finished pin down over top view former F-4 tail post Trial fit F-4 trim needed Check fit F4-B sand angle bottom snug fit F-4 Cut temporary angles scrap balsa pin place behind F-4 loca tion Epoxy F-4 place epoxy F4-B top F-4 positioned against gles Use 900 angle get tail post square glue sides together Cut aft fuselage crosspieces place over plan noting difference width top bottom shown photos plans Again discrepan cies show up between photos plans always follow plans reflect changes made after photos taken Glue /8 x -in diagonals place shown top view Pin F-5 F-6 position trial fit stringers straightness Pin F-7 place trial fit /6 x 3A-in top longerons Trim form ers necessary good fit Glue stringers formers longerons place Place F-i slots sides pull sides together using rubberband lock F-t Slide former F-3 place pinning bottom sides securely will pull meet F-3 firmly youre satisfied fit DWBRO TRIPSPIN KEEPS YOU IN Quick easy assemble Universal Designed balance items listed above special accessories Strong stable durable balancing wheels recessed prevent damage accidently dropped Du-Bros Tm- Spin prop balancer adjustable vertically horizontally conform balancing need Truly precision instrument built modelers expect very best Available now local hobby shop BALANCES AIRPLANE PROPSALL SIZES JET FANS BOAT PROPS HELICOPTER ROTOR HEADS SPINNERS CAR WHEELS AND MOTOR GEARS DU-BRO PRODUCTS INC 480 Bonner Road onda IL 60084 July 1989 35 BALANCE Specially designed locking cone securely centers locks props onto balancing shaft utmost accuracy PRECISION MODEL PRODUCTS pa USA BARSTOCK ALUMINUM SPINNERS Pan NoSize TI-iSO-B 112 TT-175-8 /4 TT-200-B 11-225-B .. 2-1/4 11-226-B 1/4 FAt 11-250-B .. 2-1/2 11-251-B .. 2-1/2FAI 75-B 3/4 11-276-B 3/4 FAI .. 11-300-B 11-301-B FAll 11-325-B -1/4 11-350-B -1/2 11-375-B /4 00-B 4 RetailApprox PriceWeight $1395058 oz 1495095oz 1595100oz 1695160oz 1895150ez 1895190oz 2095170oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz S99S520 oz 6995S70 oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner Part NoSize 11-140-A .1/4-28 11-147-A 1/4-28/7mm 11-610-A6 x 1 0mm 11-710-A-7 x 1 0mm 11-516-A5/16-24 11-516-A5/16-24/8mm 11-810-A8x 10mm 11-825-A8x 125mm 11-375-A3/8-24 11-125-AlOx 125mm RetailApprox PriceWeight S495 . 061 oz 495 . z 495 . 063 oz 495 . oz 4950 76 oz 495076oz 495076oz 495075oz 595117oz 595115ox 3 Pieces Nut Washer aird Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 squareness epoxy F-3 position Glue A-in Lite Ply fuel tank base former F-2 keeping 900 former Check fit maple engine mounts through F-i F-2 F-3 choose use firewall commercial mount omit cut outs formers keep same center lines installing mount F- 1 Remove F-l F-2 structure Install fuel tank base former F2 Position F-2 slots pull sides gether rubberband install F-i slots Install engine mount pieces through holes epoxy formers maple stock Use CyA hold tank place silicone can used later final tank installation Stuff piece foam around fuel tank tubing outlet hole F1 epoxy seal off fuel-proof firewall smoker tank installed proto type future use Disregard photos showing tank tubing outlets unless also want include model Re move fuselage structure plans Glue A-in-sq spruce slots top formers F- 1 F-2 F-3 Lay / x A-in stringers place over F-i F-3 cut slots F-2 receive glue place Note photo stringers installed Glue F2-S F35 F3B-S sides Glue -in pine landing gear mounts place us ing liberal amounts epoxy Cut 4, ply sheeting over F-i F-2 using pattern plans Note grain make easier wrap around formers photos shows sheet ing place %2 balsa sheeting being installed behind ply Glue spruce cowl hold-down blocks place flush ply against F-2 Glue %2-in wing saddle strips place Glue FB Lite Ply pieces doublers F-3 Glue % x 3A-in maple blocks wing hold-downs FB F3 using epoxy Epoxy WM Lite Ply pieces fuselage % x 3A-in ma ple block underneath Place wing saddle pin place temporarily lining up trailing edge center centerline former F4B Square wing fuselage mea suring tail post No 10 rib trailing edge Pin firmly drill rear hold-down bolt hole using Y6-in bit Re move wing drill enlarge Y16-in hole wing trailing edge in Tap maple block 4-20 threads Reinstall wing bolt down trail ing edge Square wing again pin firmly Drill front hole fit piece Y16-in dowel Drill matching hole remove wing enlarge both wing holes 14 tap maple blocks /4 -20 Bolt wing place lay sheet polyethylene over wing center section shown photo Again referring photos pin top %2-in balsa strips place wing between F-3 F4-B Pin F3-A place checking fit against F3 Pin F3-B place checking fit straightedge F3-B forward F-2 ensure continuity top sheeting Sand trim necessary Install A-in-sq top balsa stringer two side / x A-in stringers shown photos Cut off rear portion top cabin strip F3-B F-4 Cut cabin cockpit sides lightweight -in sheet balsa using outline side view plan former F3-B CF Cut front rear h-in sheet doublers lightweight stock using cabin side pattern Glue place making right left side Glue lightweight 34-in trian gle stock top edge sides re ferring photos Draw lines polyethylene sheet former F3-B F4-B felt-tip pen Pin sides lines pin former CF back sides Place F4T against F4-B holding clothespin temporarily shown photo Glue two pieces / x 3A-in stock between CF F4-T two A-in pieces substi tuted single A-in piece glue line can used reference point shaping cabin area Glue sides CF F3-B Glue %-in side sheet between CF F4-T wetting wood fit curve neces sary Glue A-in sheet doubler side sheet Glue x 1-in cap top side Glue two-piece A-in sheet top CF aft F4-T per photo Glue %2-in sheet cabin floor place checking fits well sides Glue 34 x 1 /2-in soft block piece sides front F3-B sanding insides fit curve sheeting Rough cut exterior sides using pattern shown plans Refer photo showing desired shape soft block front Rough sand bumps out cabin area sides taking care dig wing sheeting Sheet sides F4-B aft tail post Remove cabin area polyethy lene sheet plan Make cutouts F3-A hold-down blocks lo cated Epoxy maple blocks F-3 epoxy piece /e-in Lite Ply inside %2in side sheeting blocks meet Drill through sheet blocks tap latter 4-40 bolts Enlarge hole side sheet 4-40 bolt well Glue -in top sheet turtleback place glue ply hold-down plate A-in dowel top cabin sheet Drill through dowel ply enlarge ply hole insert blind nut Screw cabin structure onto fuselage assembly Fair cabin areas side sheeting using 180-grit paper little patience careful sanding will make nice smooth transition turtle hump cabin area Place canopy over cabin structure trimming good fit along glue line Mark canopy outline pen carve inside area about A-in thickness sharp knife finish sandpaper hardest part building 36 Model Aviation PROP NUT ADAPTORS V model finished can now take fun break doll up cockpit floor painted flat black sides green zinc chromate color headache rack built using piece 3A6-in alumi num tubing top radius 346-in doweling painted zinc chromate re mainder instrument panel painted almond color shown detail color photos Mask off paint sheeting over front cockpit same blue will used final exterior finish prototype used Red Devil polyurethane Empire Blue Sigs Blue Sky Bright also close color Polings full-scale Lark simulate fiberglass band fullsize plane piece 46-thick %-in wide balsa laid across top curved glued ends painted chromate Williams 3-in-scale sport pilot used dressed up piece balsa block glued bottom shaped raise pilot proper height parachute painted red match red shoelaces used straps shoulder straps black shoelaces Starting Before Takeoff placard shown photo finished cockpit glued wall before gluing canopy canopy tinted hot water black Rit dye careful make too dark Swish canopy around large roasting pan little remove rinse cold water isnt dark enough repeat process until youre satis fied full-scale Lark has just sugges tion tint canopy prototype glued Testors cement green tube variety Any similar model ce ment should work just well Mask off canopy above paint line protect Finishing fuselage Install string ers glue F3-C F2-B F2-C place sheet section i/ x -in spruce strips may glued pine landing gear blocks Install /8-in sheet between blocks fill-in File 346-in brasstubing enclose main landing gear wire wrap soft wire shown plan photo Place gear slots pine blocks holding place screwing three -in brass strips leg using commercial straps Build cover over gear per photos plans Glue three-ply hold block 1A-in sheet balsa fill-in Drill down through fairing block tap block 4-40 bolt Screw fairing place sand ing fit F2-C F3-C formers photos shows foam form shaping cowling using one-off meth od Believe folks aint worth considering cost foam boat glass epoxy hours sanding filling cutting holes etc T&D Fiberglass Specialties fers ready-to-finish cowl sample Tom Keeling sent fit fuselage per fectly would highly recommend purchas ing cowl wheel pants canopy Tom T&D canopy formed 040 material beaut requiring slight trimming perfect fit tried mold canopy 15 times before finally giv ing up easier cover tail surfaces before installing fuselage Sig Koverall nitrate dope used model excellent results After bolting wing slip stabi lizer place ensuring its square trailing edge wing level wing Make certain stabilizer true before gluing place Slip el evator used Klett pinpoint hinges secur ing aliphatic resin Install fin its slot squaring tail post us ing 900 angles side assure square ness stab Make up tail wheel assembly glue place use commercial assemblies securing ply plate epoxied fuselage bottom Install rudder glue hinges prototype given two coats ni trate dope wherever Koverall met structurethat ribs leading edge sheet tips trailing edge fuselage stringers front sheeting turtledeck sheeting Af ter sanding 220-grit paper Koverall installed brushing nitrate through material contact points iron set medium heat beauty taut covering immediately apparent magic Thats uppers building stick-and-rag models Five coats thinned nitrate brushed entire model coat thinned nitrate mixed talcum powder pure kind starch applied sanded smooth 220 Tri-M-ite followed three coats ni trate sanded 360-grit paper Finally sprayed polyurethane mist coat fol lowed fairly wet doubt could have applied red stripes Coverites Graphic Stripes 6-in sizes right mark scale appearance red ex actly matches color full-scale plane stripes joy apply eliminate masking spraying would otherwise required Theyre no thicker coat paint have beau tiful gloss Prime Time lettering Polings name hand painted 0-size long haired sable brush using Sig Skybright Yel low bottom half mixing red create orange top half reg istration numbers letters -in Hel vetica No 411 Presto Stik Vinyl letters found office supply stores Use 030-in music wire wire brac ing tail feathers %-in length %2in brass tubing flattened end drilled hole soldered wire No 2 screws used hold brac ing through holes drilled hardwood mounts ply reinforcements stab fin No 32 straight pins Sig se cured aliphatic resin used sheeted parts simulate Dzuz fasteners PK screws driven metal Continued page 141 New Rocket Uses B C andD Engines. Capability No Else Offers MRC s recent introduction 25 Moonbiaster inter mediate kit brings yet another technological advance MRCs Computer Aided Designs CAD built carry B4-2 C6-3 engines However Moonbiaster also commercially sold rocket kit includes easy-touse adapter also allows louse powerful Dengines Builtto take blast Moon blaster features large die-cut balsa fins blowmolded nose cone superb space capsule detailing Self stick decals 18chute Send free catalog See full line advanced MRC rockets hobby dealer cant help callus directly MRCe Model Rectifier Corporation 2500 Woodbridge Ave Edison NJ 08817 201 985-7800 July 1989 37 Safety/Preston Continued page 20 types animals including birds Nobody can predict time hot spots 1989 season will since known hot spots close us would wise outdoor modelers know something about disease what to avoid what symptoms aware First avoidance cant avoid encounter ing ticks small over place pet owners know However ob serving few precautions can keep ing bitten and/or infected Actions will keep ticks off skin effective preventa tive measures Ticks dwell low shrubbery grass blades get onto shoes kles lower legs crawl upward Wear long pants cinched ankle tucked socks boots less access skin bet ter Check clothing frequently especially youve through field brush retriev ing downed airplane Wearing light-colored clothing makes easier spot little devils Repellents containing Deet can used effec tively clothing shoes pants socks di rect application high concentrations skin advised new product Permanone available may effective Applied clothing both repels kills ticks After day field check feet kles legs attached ticks tick nymphs about size pinhead feeding Any find should removed imme diately fine curved-tip tweezer Grasp tick close possible its mouth part sticking skin pull outward firmly jerking Alternate methods tick re moval alcohol heat vaseline etc popular past have shown less effective good removal fast removal less chance infection Immediately after removing tick disinfect bite rubbing alcohol betadine Unfortunately victims never see tick infects symptoms Lyme dis ease include various types rash may de velop weeks after infection fatigue stiff neck flu-like symptoms headache chills fever muscle aches arthritislike symptoms difficult disease victims recognize doctor diagnose pattern symp toms varies widely case case symptoms mimic other illnesses See doctor symptoms lead suspect have disease Early treatment effec tive Untreated disease progressive can become serious its advanced stages Jesse also sent copy article Lyme disease appeared Consumer Reports June 1988 pages 382-385 Another article disease can found March 1 1989 sue American Nurseryman feature article article states New York Medical College investigating connec tion between Lyme disease multiple sclerosis MS both have similar symptoms alert ticks have safe month Lark/Shepherd Continued page 37 Brads plane scimitar show prop carved piece 2 x 12-in white pine shelving material covered multi ple coats nitrate high-gloss finish painted same white used model Designing building beguiling air plane very satisfying enjoyable Though problems cropped up solving could frustrating times playing Daedelus definitely worth too can have quarter-scale model beauti ful home-builtand fly off work bench instead drawing board Whats wont need cargo van carry flying fieldor contest site En joy building flying unique little Lark Radio Technique/Myers Continued page 41 5 A-in disk Microsoft 9 Sector format usable IBM PCs compatibles Other formats may available need Ask WIMP will ASCII accompanied handbook will have some hints conver sions other computers files disk RC Slope Soaring/Triebes Continued page 47 instant perfection successful flight landing hinting promise things come knew what next couple hand tosses Continued page 144 July 1989 141
Edition: Model Aviation - 1989/07
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 141
NO OCR TEXT NO OCR TEXT aileron servo seen has delib erately installed off-center help counter act weight side-mounted engine Top view stab/elevator showing brace wires terminals registration numbers /4-in Presto vinyl stick-ons desire build own airplane undi minished 1975 Brad began researching home-builder designs As research contacts home builders broadened found himself repeatedly turning good look landing gear mounting ar rangement along spreader bar Note wing strut -in brass mounts behind rear leg screwed l/ x -in spruce strip three-ply fairing holddown block exhaust pipes can seen close-up rudder/elevator assem bly shows -in brass mounts termi nals 030 music wire bottom brace pushrod exit slot rudder horn tail wheel assembly tail wheel homebrew assembly commercial unit appropriate size would serve just well Lark ideal projecta conservative de sign strongly built good performance low power easy fly Brad pur chased set plans went work contacted Ron Darcy help him through much construction process knowing weld en rolled night course community college started practicing scraps 26 Model Aviation Radio equipment stored away aTt ena bay Plans show exact location Author/designer Brad Shepherd Victoria TX Prime Time Only four months after its initial flight tests airplane took top honors October 1988 Scale Rally Austin TX real testament authors design skills craftsmanship piloting ability / Wheel pant installation showing radius pant inside face along two screws going through Sig wheel mount Exhaust stack fittings made -in brass strip high-temp soldered %-in brass tubing pipe engine ex haust other crankcase breather Aluminum-painted fairing witn *s pin heads screwheads closely simulates Polings full-scale Lark wing walk black Coverite Graphic roughed 180 grit no step dry-transfer lettering red striping Coverite Graphic stripes &RITO 65 4- TROK 3/&/4lflPk FIERGLA&Q \ \ - UTPLY Y4&Q&PAR N RPER TORRR N 94x3/8 QPRUCE S fl 8IIEET K \ Xz &HEET K \\\ \$7.iT2 6 7II 7/ ERGLR& CORE Left The right wing panel parts assembled glued up center section excess hasnt cut off yet Right left right panels being attached Note plywood plate over 1/8-in trailing edge rear spar spruce doubler -in sheet between spars Left The left wing tip showing -in WT-2 angle rib -in edge pieces glued 346-in WT-1 Follow plans discrepancy between drawing what see pictures Right fuselage sides being built over plans top other wax paper between best way assure two sides will identical resulting true fuselage assembled 4130 tubing time course completed ready start welding fuselage As quickly realized Brad thrown himself squarely uncompromising world big airplane construction No room Kelehers excellent plans gimmicky Mickey Mouse-type setups tubing sizes large home-built wing spar plenty beefy Brad put lust hellishly stout airplane Two other people deserve credit efforts assisting Brad progressed project A&P mechanic Jim Waiter kept him course lot little things dur ing Brads three-year stint companys headquarters Chicago good friend Larry Pennock made instruments work helped details did finish painting novel departure standard construc tion practice elimination rib stitching wing gluing 1 -in cap strips ribs gluing fabric caps After doping preliminary work including cowling metal parts finished Larry sprayed air craft Du Pont Centauri acrylic enamel turned out glossy Brad has never felt need rub out Since Larry Pinnock flying ex perience elected first flight honors Neither Larry nor Brad flown tail-dragger before both checked out first Super Cub Larry no problems Larks first flight pronounced aircraft real dandy Heres Brads panegyric after first flight Before off end runway Napa knew easy airplane fly Its very stable just outrageously easy handle Landing have such great visibility its hard get really out shape once youre ground rolls out beautifully Its twitchy Since sit centerline fuse lage can instantly detect drift crosswind correct before get trouble Its very very docile air plane During designing drawing build ing phases kept hoping upbeat words about full-scale Larks flight would carry through models charac teristics After six months drawing cut ting gluing fitting refitting redrawing etc finally have answer 28 Model Aviation sides pinned down over plans top view formers F4 F4B glued place along -in balsa gussets turtledeck formers temporarily pinned place will eventually moved shown plans during later phase construction good view showing downward angle sides fuselage being assembled COA3 LINE NOTE F-3A F39 8jITE FTO F 1/LITE PLY SHAPE AT COWL LINE r1IIIIII~ ~T/TGA TA NO NONE F1TFTF-OS3OS3~F NO'j11111111112111111111j12FRRALSA 33 SAD 10 RPL SOTJNEER 5301305ROT 50033025ROTI I25I J 3803/ ON 3/30 ALUMMOPE WM PlATES O EDT3532134A P NE NOflOM H M PLERTAOS ETRP 1/GRALSA S EPOXY WELL PA T8BALOA FOR BA TAT7i74I FE ADOB 32/ELITE PLY FOEBALSA/32NE________ -ROOT -TX P ALL DIAGONALS ARE 11051/0 FAR3/32 TSP ST IPWHEN BITLOING COBIN ON WINO i 05p{3TF-3RTWIU0321145 3 /T6ALUM TOEING POR RADIOS /CFT/BALSAFROM /TAO FINEROLASS 30905 BLOCK SEPT 0 3034313201343132GARDENCITY MI ART3SOIT/ATHEET II3AOFAF-SLIGHT I/O OGlEALLTOPFWTMER STRINGERS----3- ~ .--- -PH ATE STRAIGHTEDGE ALONOOMITTED FOR CLARITYpo--OUTMO 313FT1/A SLOT FOR FIN LA TSP OF FUSE WHEN FITONOFTIAI /I J\----\ ____-AL\ COWL--- IAA32SPRJCEIIAtLIAAT ADA 1341133 CF TM1I"IRLITEFLT- i 33AFLEMLOACTR I TFAR01430 T3F3I1 MTDEET3 3-332353 SUMORAODLU& OF OARLAR -I32433 I332ON-ZYEDMFATMLEI33/tj5 -- - - 33F 3D RRADRTSTOA3-OIMEN32ORIIRLITEPLT 0132FR----- SOARIR IS TSR SAnTA-IRISIM332DTBLFTSTRTT450800KAFMSRRAI MAKE CORRECTION IFIAO1INOAT1IOXT/0 ASEICIIRA/i32ONRLED3T- 3-T13 0t13231R13R001301 ATTACI ~ IRCOCSOSTORI -OCASISESOSFER iCOOCCO I135iCEAT 00033 \-13321 I UtOMOSS STRIP FIREGGLASS COWL &WHEELRRO3TS TAD FIREOGLASS[1fl 30925 RLSCK SEPTAEMARSIDN N TARSEN CITY ML0GT3OIAMNLSOSOENTI33030505BLAB KELEHER LARK K 2 SECTION OF LE PLACE NOEREBOIL MMAIODRS&EFOOT DEL SCALE -3T F a758 SOINPROLAREA-R FOR 00 OTSO POOR SIB ORE 3235 MMI343RDESIG13ED&DRAWNRY BRAS SHEPHERD DARED 0100Mi______________________________________ 323241013 ED43Dis32/33LFM Left Formers Fl 2 3 have inserted side panels glued place along maple engine mount stock slots top stringers former F-2 cut after formers place adjusted straightedge across top three tubing jutting out under engine mount stock attached tank will used smoke system installed later date Right side formers have installed along %2-in balsa sheeting 1/64-in plywood has wrapped around formers F-i F-2 glued place engine mount holes have drilled engine has temporarily installed order fit fiberglass cowl %2-in saddle strip wing opening glued place Note pine landing gear mounts showing through notches cut sides Left The wing has positioned bolted Polyethylene sheet has taped over wing %2-in top strip has pinned place Formers F3A F3B have positioned lined up straightedge before gluing stringers place gluing strip Balsa former F4T has clothespinned place Right Balsa sheet has glued over F3A F3B Former CF has beehi glued along strips F4T lAin sides doublers triangles have glued place %2-in cockpit floor installed Left The %-in balsa sheet has attached CF F4T Note curve transition turtledeck sides under canopy Right layer 1/4in balsa sheet has glued top CF F4T in balsa cap has glued over side assembly June 1988 15 years after Kelehers design truck necessary flight gear turned plane wind let idle first captivated prototype model wing struts bolted along moment always have butterflies Lark ready its maiden flight show prop some picture taking new creation first salutes skies After changing prop fired up 65 excitement wanting see fly June 23 1988 Steen Airstrip south Saito checked rpm began taxiing pretty much kept bay time Texas unloaded Lark pickup Going far end grass strip 430 pm throttled model up 30 Model Aviation EZE2 E3 SORTS/3/TRX 119 TEASELEVATOR1IBO1AlIAWITE -~iLiI- ----ITIRH ELEVATOR TIE BAR 3/3233/8 WEBI/S1/4 IU2SS~ [v32][b-1-10-1-10]]-AU- -------- 3/32/ R6 3/ 32 X 3/6 REAR LARLOOI sItTYR ARTHURACTUAL LAYOUTIUPR STRUT SJLEFT WING T/16 WEB r1-3/TR - r I-I-S4H~ HI 585II ---I- T. 3/16 T/2GU 10- APF--1— ___I------- ___-ijI SOSUT ATTACI4 1/40112 SPRUCE P51 1116 PUTREOHESARE RARLEARLLSHWTH 7RAIRRO 1/AO1/2 SPRUCE A0- ----A-II [v32][b-1-10-1-10]]A REAR SPAR 3/1653/B SPRUCE II 1553/6A 10I ACRE RAREI I1/5015/16 1 SET/RATIFY13/T/IRII/2FIIHR STRAIGHT GRAIN BALSAISLITS PLY 13/THYRIRS 3-ASRIBS 7-6-SI6*LA1~ET54 12EAU129 _CD 7-H CD ALL RIBS 1/B MES C GRAIN BBS 1-2RIBS 6-TO SHY HUT BIRCH PLo 2IEAUZIEG CDCD 1/2 RRTTERN FOB 5440W PROP 1/453/4 1/B SHIMS 2 p1501/2 SPRUCE WIT LIGHT 3/16-801/2 RIBST 7 EIN /jI 16-P W2HRHSRS RR W2T 364 1I AT ATS 250 NOTE rn SALESSE0 KELEHER LARK JK1B SB4GLE PLACE HOSREWIILT MODEL SCALE 3 T BIT/B IAHI IRHRSRHA BA I/B T/BXT/ 3/T601/8 RUDDER 21 401/21/ R-31/R p 3/16EASIDEHAR-S 1/B SHAH FLRTNS WITRRRELHSR TSHSAUIN PROLAREABLBGOZ FOR 60 TONG F STRORE DESIGNED DRAWN BE BRAD SHEPHERD 1/16 VEST WE 1/16 PIT 3/A 3/3203/B ALS Tsp 3/ 32 SHE E 1/801/2/ IHASTRRRHH SORWE 3/16X 3/805-T/2 SPRUCE 3i K 3/IMS TIP 1/16MW I/A S0SRRRU P65441 EDGE OF - 1/SOIIG RIGHT WING RITA GUSSET 3/3203/B WEBBING I7 1/4 / Left Starting rough shape cabin Section under canopy front soft block has fitted curved top sheet top layer -in sheet over CF F4T has roughed out Right Fitting marking canopy final shaping cabin section Left Trimming inside cabin section final shape Note outside has sanded smooth clean joint between cabin turtledeck Also note line fitting canopy Right good view transition turtledeck cabin accom plished careful sanding front F4T photo also shows horizontal stabilizer under left wing construction quite clearly Left Detailing cockpit area 3A6-in dowel tube roll bar has installed start procedure takeoff placard has glued after coating wood roll bar zinc chromate green floor flat black Brad Polings likeness waiting behind right wing Right instrument panel has finished front decking has painted blue 1Ao x -in balsa band simulating fiberglass bow over top instrument panel has installed chromated turtledeck has finished side sheeting com pleted stringers place 3A6-in landing gear fairing core attached landing gear pilot has detailed installed headed down strip playing rud der slightly keep true about 100 ft before touching up eleva tor Lark flying let climb out farther feeding little right aileron trim made 180 turn came back over field moving sticks check re sponse 1800 turn other end brought back Response good entered loop steady-running Saito allowed nice round figure 01 Dad getting elated pulled up 450 climb snapped Doing perfect imitation full-scale Lark would snap stopped wing horizontal still going up 450 After four-point roll vertical climb pushed out slowed stall nosed down about fl0 recovered throttled back got pattern Things going well tell myself get carried away have brain drain very first flight first landing too eager sticks slipped model little out form rocking back forth bounc ing around model flipped last bounce due overcontrolling elevator fortunately no damage except little scuffing canopy worked out better way second flight setting airplane up fairly long ap proach after base keeping low reduced power until crossed edge strip cutting throttle letting settle Dont try three-point landing like did first flight Bring model down its main gear let tail settle slows second flight executed number 32 Model Aviation Left Close-up showing 3A6-in brass tubing rear landing gear strut radius filed ready wrapping soldering Right Building fairing cover landing gear bottom formers F2B F2C have installed sheeted Polyethylene sheet has laid over landing gear attach area former F3C has attached 3/8-in sidepieces pinned ready 1/4-in sheet Left The %-in sheet fill-in between landing gear mounts has installed three-layer Lite Ply fairing mount has attached along bottom stringers Right bottom fairing has sanded round front angular back transitions along bottom Careful sanding shaping will result smooth scalelike appearance photos finished airplane clearly show touch-and-goes taught set model up landing properly second flight demonstrated right power weight Lark will whatever maneuvers pilot capable put through works three-turn spin immediate recovery release nose down about 600 coming out outside snap rolls loops inside snaps top rolls knife-edge flight outside loops slow flybyswith modeling buddy Leon Folse taking pictures heard voice behind propose inverted flyby immediate reaction guy nuts Ive got six months love labor flying around out wants take picture inverted pass second flight same guy egged flying Chips Model Aviation June 1981 inverted test flightand Chips Lark Pleading temporary insanity again gave Leons reckless request got picture want fine-looking quarter-scale model has lot character wont bust budget wont require van trans port good flier look over plans consider Lark Its difficult model build final results wont disappoint Itll major contender Sport Scale Giant Scale contest may want enter youll still have July 1989 33 plywood formers foam block carved shape coat epoxy before applying fiberglass over off cowl lot effort expense recommended because quality cowl along strong 040 butyrate can opy wheel pants now available Tom Keeling T&D Fiberglass Specialties completed model its bare bones stage just prior covering As can seen f ished structure appears very strong airplane capable withstanding heavy use Leader Small Airfoil Technology MAStER AIRSCREW four series choose Master Airscrew offers full line propellers flying application made tough glass-filled nylon superior strength durability G/F SERIES Designed sport flyer G/F Series available 28 popular sizes 5-11 diameters K SERIES K Series designed 4 2 stroke applications Wide undercambered blades provide greater thrust slower turning 4 strokes 8 sizes including new 12 x 8 15 x 10 tips painted safety ANTIQUE SERIES performance series features scimitar shape swept back tips plenty undercamber s suitable application Sizes 12 x 6 13 x 6 14 x 7 16 x 7 new 10 x 5 11 x 6 gold glass-filled nylon 12 x 8 15 x 12 foldIng propellers geared systems 8 selffeathering adjustable pitch prop 05 direct drive give improved thrust glide less drag fixed blade props See Hobby Dealer MASTER AIRSCREW propellers accessories Windsor Propeller Company 384 Tesconi Court Santa Rosa CA 95401 great-looking model super weekend fly ing Construction Wing assure accuracy assem bling wing panels cut out set mas ter ribs /32 ply Mark rib its position panel after its cut out pre clude chance error building Pin piece A-in-sq balsa jig line shown Place 3/6-in shims under front bottom spar pin A-in-sq spar shims Cut small 900 triangle /32 ply use keep ribs vertical install ing spar Install top A-in sq spar pinning place after ribs have pinned A-in-sq jig bottom spar Install /8 x 1 /2-in trailing edge slots ribs satis fied assembly square straight use cyanoacrylate CyA glue joints Gap-filling CyA such Super Jet glue choice takes care irregularities introduced cutting out ribs Install glue %2 x 3A-in aileron spar cap place Pin /8 x %-in leading edge glue place Slide rear 46 x %-in spruce spar place glue Refer picture panel being assembled Cut out %2 x %-in diagonals glue place between ribs Glue /6 vertical-sheet webbing both sides spars Install -in gussets cor ners Sand bevel A-in leading edge conform ribs glue %2in leading edge sheeting place Turn panel over remove shims pin down jig ribs meet board stall leading edge sheeting aileron spar cap both panels have completed lay flat surface have drawn straight line over 70 long use piece Celotex job Pin panels down bottom spar along drawn line Use aliphatic resin epoxy glue rear spar spruce joiner spar stubs Clamp clothespins until dry Glue /8 x 1 in Lite Ply trailing edge joiner top trailing edges Glue x 7A x 6/2-in spar joiner tween main spars Epoxy x 1% x 6in ply joiner rear spars center section Glue x %-in leading edge halves together Glue %2 sheeting top center section aft spars Remove wing bench Glue aileron cranks place crank mounted Install V16 music wire pushrods Sheet bottom center section Note offset position aileron servo help ful counteracting weight sidemounted engine unnecessary twin cylinder Sand front leading edge sheeting flush /8 x 3A-in lead ing edge glue /8 x -in cap place Razor plane course-sand lead ing edge rounded shape Cut tips 3/6-in lightweight sheet balsa using WT- 1 rib outline Cut 34 Model Aviation ELECTRIC SERIES HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP WT-2 rib %-in sheet two WT-3 WT-4 lightweight -in sheet Glue WT-2 place shown glue tip WT- 1 position bot tom edge lining up bottom A-in leading edge bottom trailing edge rib No 10 Note photo tip parts assembled wing Disregard WT-5 piece photo using two pieces WT-4 instead per plan Sand WT-3 pieces conform No 10 rib glue Y32in tip sheeting place Sand tip rounded shape per cross section dia gram WT-2 Build ailerons directly over plans after installing ribs onto /8 x 1-in trailing edge lining up Tail surfaces Cut outlines shape glu ing x -in spars together make /2-in sandwich method construc tion reduces chance warped spars caused using solid -in piece Notch spars assemble surfaces over plans sandwich-type construction elevator rudder results very strong lightweight structure appears realistic covered Install hinges finished fuselage built using one-side-ontop-of-the-other routine After Lite Ply doubler A-in balsa sides have cut out glued together insert waxed paper between sides build directly over plan Dont forget gluing up ply balsa forward side pieces have both right side left Con tact cement used pieces prototype CyA applied around edges Separate sides finished pin down over top view former F-4 tail post Trial fit F-4 trim needed Check fit F4-B sand angle bottom snug fit F-4 Cut temporary angles scrap balsa pin place behind F-4 loca tion Epoxy F-4 place epoxy F4-B top F-4 positioned against gles Use 900 angle get tail post square glue sides together Cut aft fuselage crosspieces place over plan noting difference width top bottom shown photos plans Again discrepan cies show up between photos plans always follow plans reflect changes made after photos taken Glue /8 x -in diagonals place shown top view Pin F-5 F-6 position trial fit stringers straightness Pin F-7 place trial fit /6 x 3A-in top longerons Trim form ers necessary good fit Glue stringers formers longerons place Place F-i slots sides pull sides together using rubberband lock F-t Slide former F-3 place pinning bottom sides securely will pull meet F-3 firmly youre satisfied fit DWBRO TRIPSPIN KEEPS YOU IN Quick easy assemble Universal Designed balance items listed above special accessories Strong stable durable balancing wheels recessed prevent damage accidently dropped Du-Bros Tm- Spin prop balancer adjustable vertically horizontally conform balancing need Truly precision instrument built modelers expect very best Available now local hobby shop BALANCES AIRPLANE PROPSALL SIZES JET FANS BOAT PROPS HELICOPTER ROTOR HEADS SPINNERS CAR WHEELS AND MOTOR GEARS DU-BRO PRODUCTS INC 480 Bonner Road onda IL 60084 July 1989 35 BALANCE Specially designed locking cone securely centers locks props onto balancing shaft utmost accuracy PRECISION MODEL PRODUCTS pa USA BARSTOCK ALUMINUM SPINNERS Pan NoSize TI-iSO-B 112 TT-175-8 /4 TT-200-B 11-225-B .. 2-1/4 11-226-B 1/4 FAt 11-250-B .. 2-1/2 11-251-B .. 2-1/2FAI 75-B 3/4 11-276-B 3/4 FAI .. 11-300-B 11-301-B FAll 11-325-B -1/4 11-350-B -1/2 11-375-B /4 00-B 4 RetailApprox PriceWeight $1395058 oz 1495095oz 1595100oz 1695160oz 1895150ez 1895190oz 2095170oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz S99S520 oz 6995S70 oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner Part NoSize 11-140-A .1/4-28 11-147-A 1/4-28/7mm 11-610-A6 x 1 0mm 11-710-A-7 x 1 0mm 11-516-A5/16-24 11-516-A5/16-24/8mm 11-810-A8x 10mm 11-825-A8x 125mm 11-375-A3/8-24 11-125-AlOx 125mm RetailApprox PriceWeight S495 . 061 oz 495 . z 495 . 063 oz 495 . oz 4950 76 oz 495076oz 495076oz 495075oz 595117oz 595115ox 3 Pieces Nut Washer aird Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 squareness epoxy F-3 position Glue A-in Lite Ply fuel tank base former F-2 keeping 900 former Check fit maple engine mounts through F-i F-2 F-3 choose use firewall commercial mount omit cut outs formers keep same center lines installing mount F- 1 Remove F-l F-2 structure Install fuel tank base former F2 Position F-2 slots pull sides gether rubberband install F-i slots Install engine mount pieces through holes epoxy formers maple stock Use CyA hold tank place silicone can used later final tank installation Stuff piece foam around fuel tank tubing outlet hole F1 epoxy seal off fuel-proof firewall smoker tank installed proto type future use Disregard photos showing tank tubing outlets unless also want include model Re move fuselage structure plans Glue A-in-sq spruce slots top formers F- 1 F-2 F-3 Lay / x A-in stringers place over F-i F-3 cut slots F-2 receive glue place Note photo stringers installed Glue F2-S F35 F3B-S sides Glue -in pine landing gear mounts place us ing liberal amounts epoxy Cut 4, ply sheeting over F-i F-2 using pattern plans Note grain make easier wrap around formers photos shows sheet ing place %2 balsa sheeting being installed behind ply Glue spruce cowl hold-down blocks place flush ply against F-2 Glue %2-in wing saddle strips place Glue FB Lite Ply pieces doublers F-3 Glue % x 3A-in maple blocks wing hold-downs FB F3 using epoxy Epoxy WM Lite Ply pieces fuselage % x 3A-in ma ple block underneath Place wing saddle pin place temporarily lining up trailing edge center centerline former F4B Square wing fuselage mea suring tail post No 10 rib trailing edge Pin firmly drill rear hold-down bolt hole using Y6-in bit Re move wing drill enlarge Y16-in hole wing trailing edge in Tap maple block 4-20 threads Reinstall wing bolt down trail ing edge Square wing again pin firmly Drill front hole fit piece Y16-in dowel Drill matching hole remove wing enlarge both wing holes 14 tap maple blocks /4 -20 Bolt wing place lay sheet polyethylene over wing center section shown photo Again referring photos pin top %2-in balsa strips place wing between F-3 F4-B Pin F3-A place checking fit against F3 Pin F3-B place checking fit straightedge F3-B forward F-2 ensure continuity top sheeting Sand trim necessary Install A-in-sq top balsa stringer two side / x A-in stringers shown photos Cut off rear portion top cabin strip F3-B F-4 Cut cabin cockpit sides lightweight -in sheet balsa using outline side view plan former F3-B CF Cut front rear h-in sheet doublers lightweight stock using cabin side pattern Glue place making right left side Glue lightweight 34-in trian gle stock top edge sides re ferring photos Draw lines polyethylene sheet former F3-B F4-B felt-tip pen Pin sides lines pin former CF back sides Place F4T against F4-B holding clothespin temporarily shown photo Glue two pieces / x 3A-in stock between CF F4-T two A-in pieces substi tuted single A-in piece glue line can used reference point shaping cabin area Glue sides CF F3-B Glue %-in side sheet between CF F4-T wetting wood fit curve neces sary Glue A-in sheet doubler side sheet Glue x 1-in cap top side Glue two-piece A-in sheet top CF aft F4-T per photo Glue %2-in sheet cabin floor place checking fits well sides Glue 34 x 1 /2-in soft block piece sides front F3-B sanding insides fit curve sheeting Rough cut exterior sides using pattern shown plans Refer photo showing desired shape soft block front Rough sand bumps out cabin area sides taking care dig wing sheeting Sheet sides F4-B aft tail post Remove cabin area polyethy lene sheet plan Make cutouts F3-A hold-down blocks lo cated Epoxy maple blocks F-3 epoxy piece /e-in Lite Ply inside %2in side sheeting blocks meet Drill through sheet blocks tap latter 4-40 bolts Enlarge hole side sheet 4-40 bolt well Glue -in top sheet turtleback place glue ply hold-down plate A-in dowel top cabin sheet Drill through dowel ply enlarge ply hole insert blind nut Screw cabin structure onto fuselage assembly Fair cabin areas side sheeting using 180-grit paper little patience careful sanding will make nice smooth transition turtle hump cabin area Place canopy over cabin structure trimming good fit along glue line Mark canopy outline pen carve inside area about A-in thickness sharp knife finish sandpaper hardest part building 36 Model Aviation PROP NUT ADAPTORS V model finished can now take fun break doll up cockpit floor painted flat black sides green zinc chromate color headache rack built using piece 3A6-in alumi num tubing top radius 346-in doweling painted zinc chromate re mainder instrument panel painted almond color shown detail color photos Mask off paint sheeting over front cockpit same blue will used final exterior finish prototype used Red Devil polyurethane Empire Blue Sigs Blue Sky Bright also close color Polings full-scale Lark simulate fiberglass band fullsize plane piece 46-thick %-in wide balsa laid across top curved glued ends painted chromate Williams 3-in-scale sport pilot used dressed up piece balsa block glued bottom shaped raise pilot proper height parachute painted red match red shoelaces used straps shoulder straps black shoelaces Starting Before Takeoff placard shown photo finished cockpit glued wall before gluing canopy canopy tinted hot water black Rit dye careful make too dark Swish canopy around large roasting pan little remove rinse cold water isnt dark enough repeat process until youre satis fied full-scale Lark has just sugges tion tint canopy prototype glued Testors cement green tube variety Any similar model ce ment should work just well Mask off canopy above paint line protect Finishing fuselage Install string ers glue F3-C F2-B F2-C place sheet section i/ x -in spruce strips may glued pine landing gear blocks Install /8-in sheet between blocks fill-in File 346-in brasstubing enclose main landing gear wire wrap soft wire shown plan photo Place gear slots pine blocks holding place screwing three -in brass strips leg using commercial straps Build cover over gear per photos plans Glue three-ply hold block 1A-in sheet balsa fill-in Drill down through fairing block tap block 4-40 bolt Screw fairing place sand ing fit F2-C F3-C formers photos shows foam form shaping cowling using one-off meth od Believe folks aint worth considering cost foam boat glass epoxy hours sanding filling cutting holes etc T&D Fiberglass Specialties fers ready-to-finish cowl sample Tom Keeling sent fit fuselage per fectly would highly recommend purchas ing cowl wheel pants canopy Tom T&D canopy formed 040 material beaut requiring slight trimming perfect fit tried mold canopy 15 times before finally giv ing up easier cover tail surfaces before installing fuselage Sig Koverall nitrate dope used model excellent results After bolting wing slip stabi lizer place ensuring its square trailing edge wing level wing Make certain stabilizer true before gluing place Slip el evator used Klett pinpoint hinges secur ing aliphatic resin Install fin its slot squaring tail post us ing 900 angles side assure square ness stab Make up tail wheel assembly glue place use commercial assemblies securing ply plate epoxied fuselage bottom Install rudder glue hinges prototype given two coats ni trate dope wherever Koverall met structurethat ribs leading edge sheet tips trailing edge fuselage stringers front sheeting turtledeck sheeting Af ter sanding 220-grit paper Koverall installed brushing nitrate through material contact points iron set medium heat beauty taut covering immediately apparent magic Thats uppers building stick-and-rag models Five coats thinned nitrate brushed entire model coat thinned nitrate mixed talcum powder pure kind starch applied sanded smooth 220 Tri-M-ite followed three coats ni trate sanded 360-grit paper Finally sprayed polyurethane mist coat fol lowed fairly wet doubt could have applied red stripes Coverites Graphic Stripes 6-in sizes right mark scale appearance red ex actly matches color full-scale plane stripes joy apply eliminate masking spraying would otherwise required Theyre no thicker coat paint have beau tiful gloss Prime Time lettering Polings name hand painted 0-size long haired sable brush using Sig Skybright Yel low bottom half mixing red create orange top half reg istration numbers letters -in Hel vetica No 411 Presto Stik Vinyl letters found office supply stores Use 030-in music wire wire brac ing tail feathers %-in length %2in brass tubing flattened end drilled hole soldered wire No 2 screws used hold brac ing through holes drilled hardwood mounts ply reinforcements stab fin No 32 straight pins Sig se cured aliphatic resin used sheeted parts simulate Dzuz fasteners PK screws driven metal Continued page 141 New Rocket Uses B C andD Engines. Capability No Else Offers MRC s recent introduction 25 Moonbiaster inter mediate kit brings yet another technological advance MRCs Computer Aided Designs CAD built carry B4-2 C6-3 engines However Moonbiaster also commercially sold rocket kit includes easy-touse adapter also allows louse powerful Dengines Builtto take blast Moon blaster features large die-cut balsa fins blowmolded nose cone superb space capsule detailing Self stick decals 18chute Send free catalog See full line advanced MRC rockets hobby dealer cant help callus directly MRCe Model Rectifier Corporation 2500 Woodbridge Ave Edison NJ 08817 201 985-7800 July 1989 37 Safety/Preston Continued page 20 types animals including birds Nobody can predict time hot spots 1989 season will since known hot spots close us would wise outdoor modelers know something about disease what to avoid what symptoms aware First avoidance cant avoid encounter ing ticks small over place pet owners know However ob serving few precautions can keep ing bitten and/or infected Actions will keep ticks off skin effective preventa tive measures Ticks dwell low shrubbery grass blades get onto shoes kles lower legs crawl upward Wear long pants cinched ankle tucked socks boots less access skin bet ter Check clothing frequently especially youve through field brush retriev ing downed airplane Wearing light-colored clothing makes easier spot little devils Repellents containing Deet can used effec tively clothing shoes pants socks di rect application high concentrations skin advised new product Permanone available may effective Applied clothing both repels kills ticks After day field check feet kles legs attached ticks tick nymphs about size pinhead feeding Any find should removed imme diately fine curved-tip tweezer Grasp tick close possible its mouth part sticking skin pull outward firmly jerking Alternate methods tick re moval alcohol heat vaseline etc popular past have shown less effective good removal fast removal less chance infection Immediately after removing tick disinfect bite rubbing alcohol betadine Unfortunately victims never see tick infects symptoms Lyme dis ease include various types rash may de velop weeks after infection fatigue stiff neck flu-like symptoms headache chills fever muscle aches arthritislike symptoms difficult disease victims recognize doctor diagnose pattern symp toms varies widely case case symptoms mimic other illnesses See doctor symptoms lead suspect have disease Early treatment effec tive Untreated disease progressive can become serious its advanced stages Jesse also sent copy article Lyme disease appeared Consumer Reports June 1988 pages 382-385 Another article disease can found March 1 1989 sue American Nurseryman feature article article states New York Medical College investigating connec tion between Lyme disease multiple sclerosis MS both have similar symptoms alert ticks have safe month Lark/Shepherd Continued page 37 Brads plane scimitar show prop carved piece 2 x 12-in white pine shelving material covered multi ple coats nitrate high-gloss finish painted same white used model Designing building beguiling air plane very satisfying enjoyable Though problems cropped up solving could frustrating times playing Daedelus definitely worth too can have quarter-scale model beauti ful home-builtand fly off work bench instead drawing board Whats wont need cargo van carry flying fieldor contest site En joy building flying unique little Lark Radio Technique/Myers Continued page 41 5 A-in disk Microsoft 9 Sector format usable IBM PCs compatibles Other formats may available need Ask WIMP will ASCII accompanied handbook will have some hints conver sions other computers files disk RC Slope Soaring/Triebes Continued page 47 instant perfection successful flight landing hinting promise things come knew what next couple hand tosses Continued page 144 July 1989 141
Edition: Model Aviation - 1989/07
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 141
NO OCR TEXT NO OCR TEXT aileron servo seen has delib erately installed off-center help counter act weight side-mounted engine Top view stab/elevator showing brace wires terminals registration numbers /4-in Presto vinyl stick-ons desire build own airplane undi minished 1975 Brad began researching home-builder designs As research contacts home builders broadened found himself repeatedly turning good look landing gear mounting ar rangement along spreader bar Note wing strut -in brass mounts behind rear leg screwed l/ x -in spruce strip three-ply fairing holddown block exhaust pipes can seen close-up rudder/elevator assem bly shows -in brass mounts termi nals 030 music wire bottom brace pushrod exit slot rudder horn tail wheel assembly tail wheel homebrew assembly commercial unit appropriate size would serve just well Lark ideal projecta conservative de sign strongly built good performance low power easy fly Brad pur chased set plans went work contacted Ron Darcy help him through much construction process knowing weld en rolled night course community college started practicing scraps 26 Model Aviation Radio equipment stored away aTt ena bay Plans show exact location Author/designer Brad Shepherd Victoria TX Prime Time Only four months after its initial flight tests airplane took top honors October 1988 Scale Rally Austin TX real testament authors design skills craftsmanship piloting ability / Wheel pant installation showing radius pant inside face along two screws going through Sig wheel mount Exhaust stack fittings made -in brass strip high-temp soldered %-in brass tubing pipe engine ex haust other crankcase breather Aluminum-painted fairing witn *s pin heads screwheads closely simulates Polings full-scale Lark wing walk black Coverite Graphic roughed 180 grit no step dry-transfer lettering red striping Coverite Graphic stripes &RITO 65 4- TROK 3/&/4lflPk FIERGLA&Q \ \ - UTPLY Y4&Q&PAR N RPER TORRR N 94x3/8 QPRUCE S fl 8IIEET K \ Xz &HEET K \\\ \$7.iT2 6 7II 7/ ERGLR& CORE Left The right wing panel parts assembled glued up center section excess hasnt cut off yet Right left right panels being attached Note plywood plate over 1/8-in trailing edge rear spar spruce doubler -in sheet between spars Left The left wing tip showing -in WT-2 angle rib -in edge pieces glued 346-in WT-1 Follow plans discrepancy between drawing what see pictures Right fuselage sides being built over plans top other wax paper between best way assure two sides will identical resulting true fuselage assembled 4130 tubing time course completed ready start welding fuselage As quickly realized Brad thrown himself squarely uncompromising world big airplane construction No room Kelehers excellent plans gimmicky Mickey Mouse-type setups tubing sizes large home-built wing spar plenty beefy Brad put lust hellishly stout airplane Two other people deserve credit efforts assisting Brad progressed project A&P mechanic Jim Waiter kept him course lot little things dur ing Brads three-year stint companys headquarters Chicago good friend Larry Pennock made instruments work helped details did finish painting novel departure standard construc tion practice elimination rib stitching wing gluing 1 -in cap strips ribs gluing fabric caps After doping preliminary work including cowling metal parts finished Larry sprayed air craft Du Pont Centauri acrylic enamel turned out glossy Brad has never felt need rub out Since Larry Pinnock flying ex perience elected first flight honors Neither Larry nor Brad flown tail-dragger before both checked out first Super Cub Larry no problems Larks first flight pronounced aircraft real dandy Heres Brads panegyric after first flight Before off end runway Napa knew easy airplane fly Its very stable just outrageously easy handle Landing have such great visibility its hard get really out shape once youre ground rolls out beautifully Its twitchy Since sit centerline fuse lage can instantly detect drift crosswind correct before get trouble Its very very docile air plane During designing drawing build ing phases kept hoping upbeat words about full-scale Larks flight would carry through models charac teristics After six months drawing cut ting gluing fitting refitting redrawing etc finally have answer 28 Model Aviation sides pinned down over plans top view formers F4 F4B glued place along -in balsa gussets turtledeck formers temporarily pinned place will eventually moved shown plans during later phase construction good view showing downward angle sides fuselage being assembled COA3 LINE NOTE F-3A F39 8jITE FTO F 1/LITE PLY SHAPE AT COWL LINE r1IIIIII~ ~T/TGA TA NO NONE F1TFTF-OS3OS3~F NO'j11111111112111111111j12FRRALSA 33 SAD 10 RPL SOTJNEER 5301305ROT 50033025ROTI I25I J 3803/ ON 3/30 ALUMMOPE WM PlATES O EDT3532134A P NE NOflOM H M PLERTAOS ETRP 1/GRALSA S EPOXY WELL PA T8BALOA FOR BA TAT7i74I FE ADOB 32/ELITE PLY FOEBALSA/32NE________ -ROOT -TX P ALL DIAGONALS ARE 11051/0 FAR3/32 TSP ST IPWHEN BITLOING COBIN ON WINO i 05p{3TF-3RTWIU0321145 3 /T6ALUM TOEING POR RADIOS /CFT/BALSAFROM /TAO FINEROLASS 30905 BLOCK SEPT 0 3034313201343132GARDENCITY MI ART3SOIT/ATHEET II3AOFAF-SLIGHT I/O OGlEALLTOPFWTMER STRINGERS----3- ~ .--- -PH ATE STRAIGHTEDGE ALONOOMITTED FOR CLARITYpo--OUTMO 313FT1/A SLOT FOR FIN LA TSP OF FUSE WHEN FITONOFTIAI /I J\----\ ____-AL\ COWL--- IAA32SPRJCEIIAtLIAAT ADA 1341133 CF TM1I"IRLITEFLT- i 33AFLEMLOACTR I TFAR01430 T3F3I1 MTDEET3 3-332353 SUMORAODLU& OF OARLAR -I32433 I332ON-ZYEDMFATMLEI33/tj5 -- - - 33F 3D RRADRTSTOA3-OIMEN32ORIIRLITEPLT 0132FR----- SOARIR IS TSR SAnTA-IRISIM332DTBLFTSTRTT450800KAFMSRRAI MAKE CORRECTION IFIAO1INOAT1IOXT/0 ASEICIIRA/i32ONRLED3T- 3-T13 0t13231R13R001301 ATTACI ~ IRCOCSOSTORI -OCASISESOSFER iCOOCCO I135iCEAT 00033 \-13321 I UtOMOSS STRIP FIREGGLASS COWL &WHEELRRO3TS TAD FIREOGLASS[1fl 30925 RLSCK SEPTAEMARSIDN N TARSEN CITY ML0GT3OIAMNLSOSOENTI33030505BLAB KELEHER LARK K 2 SECTION OF LE PLACE NOEREBOIL MMAIODRS&EFOOT DEL SCALE -3T F a758 SOINPROLAREA-R FOR 00 OTSO POOR SIB ORE 3235 MMI343RDESIG13ED&DRAWNRY BRAS SHEPHERD DARED 0100Mi______________________________________ 323241013 ED43Dis32/33LFM Left Formers Fl 2 3 have inserted side panels glued place along maple engine mount stock slots top stringers former F-2 cut after formers place adjusted straightedge across top three tubing jutting out under engine mount stock attached tank will used smoke system installed later date Right side formers have installed along %2-in balsa sheeting 1/64-in plywood has wrapped around formers F-i F-2 glued place engine mount holes have drilled engine has temporarily installed order fit fiberglass cowl %2-in saddle strip wing opening glued place Note pine landing gear mounts showing through notches cut sides Left The wing has positioned bolted Polyethylene sheet has taped over wing %2-in top strip has pinned place Formers F3A F3B have positioned lined up straightedge before gluing stringers place gluing strip Balsa former F4T has clothespinned place Right Balsa sheet has glued over F3A F3B Former CF has beehi glued along strips F4T lAin sides doublers triangles have glued place %2-in cockpit floor installed Left The %-in balsa sheet has attached CF F4T Note curve transition turtledeck sides under canopy Right layer 1/4in balsa sheet has glued top CF F4T in balsa cap has glued over side assembly June 1988 15 years after Kelehers design truck necessary flight gear turned plane wind let idle first captivated prototype model wing struts bolted along moment always have butterflies Lark ready its maiden flight show prop some picture taking new creation first salutes skies After changing prop fired up 65 excitement wanting see fly June 23 1988 Steen Airstrip south Saito checked rpm began taxiing pretty much kept bay time Texas unloaded Lark pickup Going far end grass strip 430 pm throttled model up 30 Model Aviation EZE2 E3 SORTS/3/TRX 119 TEASELEVATOR1IBO1AlIAWITE -~iLiI- ----ITIRH ELEVATOR TIE BAR 3/3233/8 WEBI/S1/4 IU2SS~ [v32][b-1-10-1-10]]-AU- -------- 3/32/ R6 3/ 32 X 3/6 REAR LARLOOI sItTYR ARTHURACTUAL LAYOUTIUPR STRUT SJLEFT WING T/16 WEB r1-3/TR - r I-I-S4H~ HI 585II ---I- T. 3/16 T/2GU 10- APF--1— ___I------- ___-ijI SOSUT ATTACI4 1/40112 SPRUCE P51 1116 PUTREOHESARE RARLEARLLSHWTH 7RAIRRO 1/AO1/2 SPRUCE A0- ----A-II [v32][b-1-10-1-10]]A REAR SPAR 3/1653/B SPRUCE II 1553/6A 10I ACRE RAREI I1/5015/16 1 SET/RATIFY13/T/IRII/2FIIHR STRAIGHT GRAIN BALSAISLITS PLY 13/THYRIRS 3-ASRIBS 7-6-SI6*LA1~ET54 12EAU129 _CD 7-H CD ALL RIBS 1/B MES C GRAIN BBS 1-2RIBS 6-TO SHY HUT BIRCH PLo 2IEAUZIEG CDCD 1/2 RRTTERN FOB 5440W PROP 1/453/4 1/B SHIMS 2 p1501/2 SPRUCE WIT LIGHT 3/16-801/2 RIBST 7 EIN /jI 16-P W2HRHSRS RR W2T 364 1I AT ATS 250 NOTE rn SALESSE0 KELEHER LARK JK1B SB4GLE PLACE HOSREWIILT MODEL SCALE 3 T BIT/B IAHI IRHRSRHA BA I/B T/BXT/ 3/T601/8 RUDDER 21 401/21/ R-31/R p 3/16EASIDEHAR-S 1/B SHAH FLRTNS WITRRRELHSR TSHSAUIN PROLAREABLBGOZ FOR 60 TONG F STRORE DESIGNED DRAWN BE BRAD SHEPHERD 1/16 VEST WE 1/16 PIT 3/A 3/3203/B ALS Tsp 3/ 32 SHE E 1/801/2/ IHASTRRRHH SORWE 3/16X 3/805-T/2 SPRUCE 3i K 3/IMS TIP 1/16MW I/A S0SRRRU P65441 EDGE OF - 1/SOIIG RIGHT WING RITA GUSSET 3/3203/B WEBBING I7 1/4 / Left Starting rough shape cabin Section under canopy front soft block has fitted curved top sheet top layer -in sheet over CF F4T has roughed out Right Fitting marking canopy final shaping cabin section Left Trimming inside cabin section final shape Note outside has sanded smooth clean joint between cabin turtledeck Also note line fitting canopy Right good view transition turtledeck cabin accom plished careful sanding front F4T photo also shows horizontal stabilizer under left wing construction quite clearly Left Detailing cockpit area 3A6-in dowel tube roll bar has installed start procedure takeoff placard has glued after coating wood roll bar zinc chromate green floor flat black Brad Polings likeness waiting behind right wing Right instrument panel has finished front decking has painted blue 1Ao x -in balsa band simulating fiberglass bow over top instrument panel has installed chromated turtledeck has finished side sheeting com pleted stringers place 3A6-in landing gear fairing core attached landing gear pilot has detailed installed headed down strip playing rud der slightly keep true about 100 ft before touching up eleva tor Lark flying let climb out farther feeding little right aileron trim made 180 turn came back over field moving sticks check re sponse 1800 turn other end brought back Response good entered loop steady-running Saito allowed nice round figure 01 Dad getting elated pulled up 450 climb snapped Doing perfect imitation full-scale Lark would snap stopped wing horizontal still going up 450 After four-point roll vertical climb pushed out slowed stall nosed down about fl0 recovered throttled back got pattern Things going well tell myself get carried away have brain drain very first flight first landing too eager sticks slipped model little out form rocking back forth bounc ing around model flipped last bounce due overcontrolling elevator fortunately no damage except little scuffing canopy worked out better way second flight setting airplane up fairly long ap proach after base keeping low reduced power until crossed edge strip cutting throttle letting settle Dont try three-point landing like did first flight Bring model down its main gear let tail settle slows second flight executed number 32 Model Aviation Left Close-up showing 3A6-in brass tubing rear landing gear strut radius filed ready wrapping soldering Right Building fairing cover landing gear bottom formers F2B F2C have installed sheeted Polyethylene sheet has laid over landing gear attach area former F3C has attached 3/8-in sidepieces pinned ready 1/4-in sheet Left The %-in sheet fill-in between landing gear mounts has installed three-layer Lite Ply fairing mount has attached along bottom stringers Right bottom fairing has sanded round front angular back transitions along bottom Careful sanding shaping will result smooth scalelike appearance photos finished airplane clearly show touch-and-goes taught set model up landing properly second flight demonstrated right power weight Lark will whatever maneuvers pilot capable put through works three-turn spin immediate recovery release nose down about 600 coming out outside snap rolls loops inside snaps top rolls knife-edge flight outside loops slow flybyswith modeling buddy Leon Folse taking pictures heard voice behind propose inverted flyby immediate reaction guy nuts Ive got six months love labor flying around out wants take picture inverted pass second flight same guy egged flying Chips Model Aviation June 1981 inverted test flightand Chips Lark Pleading temporary insanity again gave Leons reckless request got picture want fine-looking quarter-scale model has lot character wont bust budget wont require van trans port good flier look over plans consider Lark Its difficult model build final results wont disappoint Itll major contender Sport Scale Giant Scale contest may want enter youll still have July 1989 33 plywood formers foam block carved shape coat epoxy before applying fiberglass over off cowl lot effort expense recommended because quality cowl along strong 040 butyrate can opy wheel pants now available Tom Keeling T&D Fiberglass Specialties completed model its bare bones stage just prior covering As can seen f ished structure appears very strong airplane capable withstanding heavy use Leader Small Airfoil Technology MAStER AIRSCREW four series choose Master Airscrew offers full line propellers flying application made tough glass-filled nylon superior strength durability G/F SERIES Designed sport flyer G/F Series available 28 popular sizes 5-11 diameters K SERIES K Series designed 4 2 stroke applications Wide undercambered blades provide greater thrust slower turning 4 strokes 8 sizes including new 12 x 8 15 x 10 tips painted safety ANTIQUE SERIES performance series features scimitar shape swept back tips plenty undercamber s suitable application Sizes 12 x 6 13 x 6 14 x 7 16 x 7 new 10 x 5 11 x 6 gold glass-filled nylon 12 x 8 15 x 12 foldIng propellers geared systems 8 selffeathering adjustable pitch prop 05 direct drive give improved thrust glide less drag fixed blade props See Hobby Dealer MASTER AIRSCREW propellers accessories Windsor Propeller Company 384 Tesconi Court Santa Rosa CA 95401 great-looking model super weekend fly ing Construction Wing assure accuracy assem bling wing panels cut out set mas ter ribs /32 ply Mark rib its position panel after its cut out pre clude chance error building Pin piece A-in-sq balsa jig line shown Place 3/6-in shims under front bottom spar pin A-in-sq spar shims Cut small 900 triangle /32 ply use keep ribs vertical install ing spar Install top A-in sq spar pinning place after ribs have pinned A-in-sq jig bottom spar Install /8 x 1 /2-in trailing edge slots ribs satis fied assembly square straight use cyanoacrylate CyA glue joints Gap-filling CyA such Super Jet glue choice takes care irregularities introduced cutting out ribs Install glue %2 x 3A-in aileron spar cap place Pin /8 x %-in leading edge glue place Slide rear 46 x %-in spruce spar place glue Refer picture panel being assembled Cut out %2 x %-in diagonals glue place between ribs Glue /6 vertical-sheet webbing both sides spars Install -in gussets cor ners Sand bevel A-in leading edge conform ribs glue %2in leading edge sheeting place Turn panel over remove shims pin down jig ribs meet board stall leading edge sheeting aileron spar cap both panels have completed lay flat surface have drawn straight line over 70 long use piece Celotex job Pin panels down bottom spar along drawn line Use aliphatic resin epoxy glue rear spar spruce joiner spar stubs Clamp clothespins until dry Glue /8 x 1 in Lite Ply trailing edge joiner top trailing edges Glue x 7A x 6/2-in spar joiner tween main spars Epoxy x 1% x 6in ply joiner rear spars center section Glue x %-in leading edge halves together Glue %2 sheeting top center section aft spars Remove wing bench Glue aileron cranks place crank mounted Install V16 music wire pushrods Sheet bottom center section Note offset position aileron servo help ful counteracting weight sidemounted engine unnecessary twin cylinder Sand front leading edge sheeting flush /8 x 3A-in lead ing edge glue /8 x -in cap place Razor plane course-sand lead ing edge rounded shape Cut tips 3/6-in lightweight sheet balsa using WT- 1 rib outline Cut 34 Model Aviation ELECTRIC SERIES HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP WT-2 rib %-in sheet two WT-3 WT-4 lightweight -in sheet Glue WT-2 place shown glue tip WT- 1 position bot tom edge lining up bottom A-in leading edge bottom trailing edge rib No 10 Note photo tip parts assembled wing Disregard WT-5 piece photo using two pieces WT-4 instead per plan Sand WT-3 pieces conform No 10 rib glue Y32in tip sheeting place Sand tip rounded shape per cross section dia gram WT-2 Build ailerons directly over plans after installing ribs onto /8 x 1-in trailing edge lining up Tail surfaces Cut outlines shape glu ing x -in spars together make /2-in sandwich method construc tion reduces chance warped spars caused using solid -in piece Notch spars assemble surfaces over plans sandwich-type construction elevator rudder results very strong lightweight structure appears realistic covered Install hinges finished fuselage built using one-side-ontop-of-the-other routine After Lite Ply doubler A-in balsa sides have cut out glued together insert waxed paper between sides build directly over plan Dont forget gluing up ply balsa forward side pieces have both right side left Con tact cement used pieces prototype CyA applied around edges Separate sides finished pin down over top view former F-4 tail post Trial fit F-4 trim needed Check fit F4-B sand angle bottom snug fit F-4 Cut temporary angles scrap balsa pin place behind F-4 loca tion Epoxy F-4 place epoxy F4-B top F-4 positioned against gles Use 900 angle get tail post square glue sides together Cut aft fuselage crosspieces place over plan noting difference width top bottom shown photos plans Again discrepan cies show up between photos plans always follow plans reflect changes made after photos taken Glue /8 x -in diagonals place shown top view Pin F-5 F-6 position trial fit stringers straightness Pin F-7 place trial fit /6 x 3A-in top longerons Trim form ers necessary good fit Glue stringers formers longerons place Place F-i slots sides pull sides together using rubberband lock F-t Slide former F-3 place pinning bottom sides securely will pull meet F-3 firmly youre satisfied fit DWBRO TRIPSPIN KEEPS YOU IN Quick easy assemble Universal Designed balance items listed above special accessories Strong stable durable balancing wheels recessed prevent damage accidently dropped Du-Bros Tm- Spin prop balancer adjustable vertically horizontally conform balancing need Truly precision instrument built modelers expect very best Available now local hobby shop BALANCES AIRPLANE PROPSALL SIZES JET FANS BOAT PROPS HELICOPTER ROTOR HEADS SPINNERS CAR WHEELS AND MOTOR GEARS DU-BRO PRODUCTS INC 480 Bonner Road onda IL 60084 July 1989 35 BALANCE Specially designed locking cone securely centers locks props onto balancing shaft utmost accuracy PRECISION MODEL PRODUCTS pa USA BARSTOCK ALUMINUM SPINNERS Pan NoSize TI-iSO-B 112 TT-175-8 /4 TT-200-B 11-225-B .. 2-1/4 11-226-B 1/4 FAt 11-250-B .. 2-1/2 11-251-B .. 2-1/2FAI 75-B 3/4 11-276-B 3/4 FAI .. 11-300-B 11-301-B FAll 11-325-B -1/4 11-350-B -1/2 11-375-B /4 00-B 4 RetailApprox PriceWeight $1395058 oz 1495095oz 1595100oz 1695160oz 1895150ez 1895190oz 2095170oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz S99S520 oz 6995S70 oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner Part NoSize 11-140-A .1/4-28 11-147-A 1/4-28/7mm 11-610-A6 x 1 0mm 11-710-A-7 x 1 0mm 11-516-A5/16-24 11-516-A5/16-24/8mm 11-810-A8x 10mm 11-825-A8x 125mm 11-375-A3/8-24 11-125-AlOx 125mm RetailApprox PriceWeight S495 . 061 oz 495 . z 495 . 063 oz 495 . oz 4950 76 oz 495076oz 495076oz 495075oz 595117oz 595115ox 3 Pieces Nut Washer aird Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 squareness epoxy F-3 position Glue A-in Lite Ply fuel tank base former F-2 keeping 900 former Check fit maple engine mounts through F-i F-2 F-3 choose use firewall commercial mount omit cut outs formers keep same center lines installing mount F- 1 Remove F-l F-2 structure Install fuel tank base former F2 Position F-2 slots pull sides gether rubberband install F-i slots Install engine mount pieces through holes epoxy formers maple stock Use CyA hold tank place silicone can used later final tank installation Stuff piece foam around fuel tank tubing outlet hole F1 epoxy seal off fuel-proof firewall smoker tank installed proto type future use Disregard photos showing tank tubing outlets unless also want include model Re move fuselage structure plans Glue A-in-sq spruce slots top formers F- 1 F-2 F-3 Lay / x A-in stringers place over F-i F-3 cut slots F-2 receive glue place Note photo stringers installed Glue F2-S F35 F3B-S sides Glue -in pine landing gear mounts place us ing liberal amounts epoxy Cut 4, ply sheeting over F-i F-2 using pattern plans Note grain make easier wrap around formers photos shows sheet ing place %2 balsa sheeting being installed behind ply Glue spruce cowl hold-down blocks place flush ply against F-2 Glue %2-in wing saddle strips place Glue FB Lite Ply pieces doublers F-3 Glue % x 3A-in maple blocks wing hold-downs FB F3 using epoxy Epoxy WM Lite Ply pieces fuselage % x 3A-in ma ple block underneath Place wing saddle pin place temporarily lining up trailing edge center centerline former F4B Square wing fuselage mea suring tail post No 10 rib trailing edge Pin firmly drill rear hold-down bolt hole using Y6-in bit Re move wing drill enlarge Y16-in hole wing trailing edge in Tap maple block 4-20 threads Reinstall wing bolt down trail ing edge Square wing again pin firmly Drill front hole fit piece Y16-in dowel Drill matching hole remove wing enlarge both wing holes 14 tap maple blocks /4 -20 Bolt wing place lay sheet polyethylene over wing center section shown photo Again referring photos pin top %2-in balsa strips place wing between F-3 F4-B Pin F3-A place checking fit against F3 Pin F3-B place checking fit straightedge F3-B forward F-2 ensure continuity top sheeting Sand trim necessary Install A-in-sq top balsa stringer two side / x A-in stringers shown photos Cut off rear portion top cabin strip F3-B F-4 Cut cabin cockpit sides lightweight -in sheet balsa using outline side view plan former F3-B CF Cut front rear h-in sheet doublers lightweight stock using cabin side pattern Glue place making right left side Glue lightweight 34-in trian gle stock top edge sides re ferring photos Draw lines polyethylene sheet former F3-B F4-B felt-tip pen Pin sides lines pin former CF back sides Place F4T against F4-B holding clothespin temporarily shown photo Glue two pieces / x 3A-in stock between CF F4-T two A-in pieces substi tuted single A-in piece glue line can used reference point shaping cabin area Glue sides CF F3-B Glue %-in side sheet between CF F4-T wetting wood fit curve neces sary Glue A-in sheet doubler side sheet Glue x 1-in cap top side Glue two-piece A-in sheet top CF aft F4-T per photo Glue %2-in sheet cabin floor place checking fits well sides Glue 34 x 1 /2-in soft block piece sides front F3-B sanding insides fit curve sheeting Rough cut exterior sides using pattern shown plans Refer photo showing desired shape soft block front Rough sand bumps out cabin area sides taking care dig wing sheeting Sheet sides F4-B aft tail post Remove cabin area polyethy lene sheet plan Make cutouts F3-A hold-down blocks lo cated Epoxy maple blocks F-3 epoxy piece /e-in Lite Ply inside %2in side sheeting blocks meet Drill through sheet blocks tap latter 4-40 bolts Enlarge hole side sheet 4-40 bolt well Glue -in top sheet turtleback place glue ply hold-down plate A-in dowel top cabin sheet Drill through dowel ply enlarge ply hole insert blind nut Screw cabin structure onto fuselage assembly Fair cabin areas side sheeting using 180-grit paper little patience careful sanding will make nice smooth transition turtle hump cabin area Place canopy over cabin structure trimming good fit along glue line Mark canopy outline pen carve inside area about A-in thickness sharp knife finish sandpaper hardest part building 36 Model Aviation PROP NUT ADAPTORS V model finished can now take fun break doll up cockpit floor painted flat black sides green zinc chromate color headache rack built using piece 3A6-in alumi num tubing top radius 346-in doweling painted zinc chromate re mainder instrument panel painted almond color shown detail color photos Mask off paint sheeting over front cockpit same blue will used final exterior finish prototype used Red Devil polyurethane Empire Blue Sigs Blue Sky Bright also close color Polings full-scale Lark simulate fiberglass band fullsize plane piece 46-thick %-in wide balsa laid across top curved glued ends painted chromate Williams 3-in-scale sport pilot used dressed up piece balsa block glued bottom shaped raise pilot proper height parachute painted red match red shoelaces used straps shoulder straps black shoelaces Starting Before Takeoff placard shown photo finished cockpit glued wall before gluing canopy canopy tinted hot water black Rit dye careful make too dark Swish canopy around large roasting pan little remove rinse cold water isnt dark enough repeat process until youre satis fied full-scale Lark has just sugges tion tint canopy prototype glued Testors cement green tube variety Any similar model ce ment should work just well Mask off canopy above paint line protect Finishing fuselage Install string ers glue F3-C F2-B F2-C place sheet section i/ x -in spruce strips may glued pine landing gear blocks Install /8-in sheet between blocks fill-in File 346-in brasstubing enclose main landing gear wire wrap soft wire shown plan photo Place gear slots pine blocks holding place screwing three -in brass strips leg using commercial straps Build cover over gear per photos plans Glue three-ply hold block 1A-in sheet balsa fill-in Drill down through fairing block tap block 4-40 bolt Screw fairing place sand ing fit F2-C F3-C formers photos shows foam form shaping cowling using one-off meth od Believe folks aint worth considering cost foam boat glass epoxy hours sanding filling cutting holes etc T&D Fiberglass Specialties fers ready-to-finish cowl sample Tom Keeling sent fit fuselage per fectly would highly recommend purchas ing cowl wheel pants canopy Tom T&D canopy formed 040 material beaut requiring slight trimming perfect fit tried mold canopy 15 times before finally giv ing up easier cover tail surfaces before installing fuselage Sig Koverall nitrate dope used model excellent results After bolting wing slip stabi lizer place ensuring its square trailing edge wing level wing Make certain stabilizer true before gluing place Slip el evator used Klett pinpoint hinges secur ing aliphatic resin Install fin its slot squaring tail post us ing 900 angles side assure square ness stab Make up tail wheel assembly glue place use commercial assemblies securing ply plate epoxied fuselage bottom Install rudder glue hinges prototype given two coats ni trate dope wherever Koverall met structurethat ribs leading edge sheet tips trailing edge fuselage stringers front sheeting turtledeck sheeting Af ter sanding 220-grit paper Koverall installed brushing nitrate through material contact points iron set medium heat beauty taut covering immediately apparent magic Thats uppers building stick-and-rag models Five coats thinned nitrate brushed entire model coat thinned nitrate mixed talcum powder pure kind starch applied sanded smooth 220 Tri-M-ite followed three coats ni trate sanded 360-grit paper Finally sprayed polyurethane mist coat fol lowed fairly wet doubt could have applied red stripes Coverites Graphic Stripes 6-in sizes right mark scale appearance red ex actly matches color full-scale plane stripes joy apply eliminate masking spraying would otherwise required Theyre no thicker coat paint have beau tiful gloss Prime Time lettering Polings name hand painted 0-size long haired sable brush using Sig Skybright Yel low bottom half mixing red create orange top half reg istration numbers letters -in Hel vetica No 411 Presto Stik Vinyl letters found office supply stores Use 030-in music wire wire brac ing tail feathers %-in length %2in brass tubing flattened end drilled hole soldered wire No 2 screws used hold brac ing through holes drilled hardwood mounts ply reinforcements stab fin No 32 straight pins Sig se cured aliphatic resin used sheeted parts simulate Dzuz fasteners PK screws driven metal Continued page 141 New Rocket Uses B C andD Engines. Capability No Else Offers MRC s recent introduction 25 Moonbiaster inter mediate kit brings yet another technological advance MRCs Computer Aided Designs CAD built carry B4-2 C6-3 engines However Moonbiaster also commercially sold rocket kit includes easy-touse adapter also allows louse powerful Dengines Builtto take blast Moon blaster features large die-cut balsa fins blowmolded nose cone superb space capsule detailing Self stick decals 18chute Send free catalog See full line advanced MRC rockets hobby dealer cant help callus directly MRCe Model Rectifier Corporation 2500 Woodbridge Ave Edison NJ 08817 201 985-7800 July 1989 37 Safety/Preston Continued page 20 types animals including birds Nobody can predict time hot spots 1989 season will since known hot spots close us would wise outdoor modelers know something about disease what to avoid what symptoms aware First avoidance cant avoid encounter ing ticks small over place pet owners know However ob serving few precautions can keep ing bitten and/or infected Actions will keep ticks off skin effective preventa tive measures Ticks dwell low shrubbery grass blades get onto shoes kles lower legs crawl upward Wear long pants cinched ankle tucked socks boots less access skin bet ter Check clothing frequently especially youve through field brush retriev ing downed airplane Wearing light-colored clothing makes easier spot little devils Repellents containing Deet can used effec tively clothing shoes pants socks di rect application high concentrations skin advised new product Permanone available may effective Applied clothing both repels kills ticks After day field check feet kles legs attached ticks tick nymphs about size pinhead feeding Any find should removed imme diately fine curved-tip tweezer Grasp tick close possible its mouth part sticking skin pull outward firmly jerking Alternate methods tick re moval alcohol heat vaseline etc popular past have shown less effective good removal fast removal less chance infection Immediately after removing tick disinfect bite rubbing alcohol betadine Unfortunately victims never see tick infects symptoms Lyme dis ease include various types rash may de velop weeks after infection fatigue stiff neck flu-like symptoms headache chills fever muscle aches arthritislike symptoms difficult disease victims recognize doctor diagnose pattern symp toms varies widely case case symptoms mimic other illnesses See doctor symptoms lead suspect have disease Early treatment effec tive Untreated disease progressive can become serious its advanced stages Jesse also sent copy article Lyme disease appeared Consumer Reports June 1988 pages 382-385 Another article disease can found March 1 1989 sue American Nurseryman feature article article states New York Medical College investigating connec tion between Lyme disease multiple sclerosis MS both have similar symptoms alert ticks have safe month Lark/Shepherd Continued page 37 Brads plane scimitar show prop carved piece 2 x 12-in white pine shelving material covered multi ple coats nitrate high-gloss finish painted same white used model Designing building beguiling air plane very satisfying enjoyable Though problems cropped up solving could frustrating times playing Daedelus definitely worth too can have quarter-scale model beauti ful home-builtand fly off work bench instead drawing board Whats wont need cargo van carry flying fieldor contest site En joy building flying unique little Lark Radio Technique/Myers Continued page 41 5 A-in disk Microsoft 9 Sector format usable IBM PCs compatibles Other formats may available need Ask WIMP will ASCII accompanied handbook will have some hints conver sions other computers files disk RC Slope Soaring/Triebes Continued page 47 instant perfection successful flight landing hinting promise things come knew what next couple hand tosses Continued page 144 July 1989 141
Edition: Model Aviation - 1989/07
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 141
NO OCR TEXT NO OCR TEXT aileron servo seen has delib erately installed off-center help counter act weight side-mounted engine Top view stab/elevator showing brace wires terminals registration numbers /4-in Presto vinyl stick-ons desire build own airplane undi minished 1975 Brad began researching home-builder designs As research contacts home builders broadened found himself repeatedly turning good look landing gear mounting ar rangement along spreader bar Note wing strut -in brass mounts behind rear leg screwed l/ x -in spruce strip three-ply fairing holddown block exhaust pipes can seen close-up rudder/elevator assem bly shows -in brass mounts termi nals 030 music wire bottom brace pushrod exit slot rudder horn tail wheel assembly tail wheel homebrew assembly commercial unit appropriate size would serve just well Lark ideal projecta conservative de sign strongly built good performance low power easy fly Brad pur chased set plans went work contacted Ron Darcy help him through much construction process knowing weld en rolled night course community college started practicing scraps 26 Model Aviation Radio equipment stored away aTt ena bay Plans show exact location Author/designer Brad Shepherd Victoria TX Prime Time Only four months after its initial flight tests airplane took top honors October 1988 Scale Rally Austin TX real testament authors design skills craftsmanship piloting ability / Wheel pant installation showing radius pant inside face along two screws going through Sig wheel mount Exhaust stack fittings made -in brass strip high-temp soldered %-in brass tubing pipe engine ex haust other crankcase breather Aluminum-painted fairing witn *s pin heads screwheads closely simulates Polings full-scale Lark wing walk black Coverite Graphic roughed 180 grit no step dry-transfer lettering red striping Coverite Graphic stripes &RITO 65 4- TROK 3/&/4lflPk FIERGLA&Q \ \ - UTPLY Y4&Q&PAR N RPER TORRR N 94x3/8 QPRUCE S fl 8IIEET K \ Xz &HEET K \\\ \$7.iT2 6 7II 7/ ERGLR& CORE Left The right wing panel parts assembled glued up center section excess hasnt cut off yet Right left right panels being attached Note plywood plate over 1/8-in trailing edge rear spar spruce doubler -in sheet between spars Left The left wing tip showing -in WT-2 angle rib -in edge pieces glued 346-in WT-1 Follow plans discrepancy between drawing what see pictures Right fuselage sides being built over plans top other wax paper between best way assure two sides will identical resulting true fuselage assembled 4130 tubing time course completed ready start welding fuselage As quickly realized Brad thrown himself squarely uncompromising world big airplane construction No room Kelehers excellent plans gimmicky Mickey Mouse-type setups tubing sizes large home-built wing spar plenty beefy Brad put lust hellishly stout airplane Two other people deserve credit efforts assisting Brad progressed project A&P mechanic Jim Waiter kept him course lot little things dur ing Brads three-year stint companys headquarters Chicago good friend Larry Pennock made instruments work helped details did finish painting novel departure standard construc tion practice elimination rib stitching wing gluing 1 -in cap strips ribs gluing fabric caps After doping preliminary work including cowling metal parts finished Larry sprayed air craft Du Pont Centauri acrylic enamel turned out glossy Brad has never felt need rub out Since Larry Pinnock flying ex perience elected first flight honors Neither Larry nor Brad flown tail-dragger before both checked out first Super Cub Larry no problems Larks first flight pronounced aircraft real dandy Heres Brads panegyric after first flight Before off end runway Napa knew easy airplane fly Its very stable just outrageously easy handle Landing have such great visibility its hard get really out shape once youre ground rolls out beautifully Its twitchy Since sit centerline fuse lage can instantly detect drift crosswind correct before get trouble Its very very docile air plane During designing drawing build ing phases kept hoping upbeat words about full-scale Larks flight would carry through models charac teristics After six months drawing cut ting gluing fitting refitting redrawing etc finally have answer 28 Model Aviation sides pinned down over plans top view formers F4 F4B glued place along -in balsa gussets turtledeck formers temporarily pinned place will eventually moved shown plans during later phase construction good view showing downward angle sides fuselage being assembled COA3 LINE NOTE F-3A F39 8jITE FTO F 1/LITE PLY SHAPE AT COWL LINE r1IIIIII~ ~T/TGA TA NO NONE F1TFTF-OS3OS3~F NO'j11111111112111111111j12FRRALSA 33 SAD 10 RPL SOTJNEER 5301305ROT 50033025ROTI I25I J 3803/ ON 3/30 ALUMMOPE WM PlATES O EDT3532134A P NE NOflOM H M PLERTAOS ETRP 1/GRALSA S EPOXY WELL PA T8BALOA FOR BA TAT7i74I FE ADOB 32/ELITE PLY FOEBALSA/32NE________ -ROOT -TX P ALL DIAGONALS ARE 11051/0 FAR3/32 TSP ST IPWHEN BITLOING COBIN ON WINO i 05p{3TF-3RTWIU0321145 3 /T6ALUM TOEING POR RADIOS /CFT/BALSAFROM /TAO FINEROLASS 30905 BLOCK SEPT 0 3034313201343132GARDENCITY MI ART3SOIT/ATHEET II3AOFAF-SLIGHT I/O OGlEALLTOPFWTMER STRINGERS----3- ~ .--- -PH ATE STRAIGHTEDGE ALONOOMITTED FOR CLARITYpo--OUTMO 313FT1/A SLOT FOR FIN LA TSP OF FUSE WHEN FITONOFTIAI /I J\----\ ____-AL\ COWL--- IAA32SPRJCEIIAtLIAAT ADA 1341133 CF TM1I"IRLITEFLT- i 33AFLEMLOACTR I TFAR01430 T3F3I1 MTDEET3 3-332353 SUMORAODLU& OF OARLAR -I32433 I332ON-ZYEDMFATMLEI33/tj5 -- - - 33F 3D RRADRTSTOA3-OIMEN32ORIIRLITEPLT 0132FR----- SOARIR IS TSR SAnTA-IRISIM332DTBLFTSTRTT450800KAFMSRRAI MAKE CORRECTION IFIAO1INOAT1IOXT/0 ASEICIIRA/i32ONRLED3T- 3-T13 0t13231R13R001301 ATTACI ~ IRCOCSOSTORI -OCASISESOSFER iCOOCCO I135iCEAT 00033 \-13321 I UtOMOSS STRIP FIREGGLASS COWL &WHEELRRO3TS TAD FIREOGLASS[1fl 30925 RLSCK SEPTAEMARSIDN N TARSEN CITY ML0GT3OIAMNLSOSOENTI33030505BLAB KELEHER LARK K 2 SECTION OF LE PLACE NOEREBOIL MMAIODRS&EFOOT DEL SCALE -3T F a758 SOINPROLAREA-R FOR 00 OTSO POOR SIB ORE 3235 MMI343RDESIG13ED&DRAWNRY BRAS SHEPHERD DARED 0100Mi______________________________________ 323241013 ED43Dis32/33LFM Left Formers Fl 2 3 have inserted side panels glued place along maple engine mount stock slots top stringers former F-2 cut after formers place adjusted straightedge across top three tubing jutting out under engine mount stock attached tank will used smoke system installed later date Right side formers have installed along %2-in balsa sheeting 1/64-in plywood has wrapped around formers F-i F-2 glued place engine mount holes have drilled engine has temporarily installed order fit fiberglass cowl %2-in saddle strip wing opening glued place Note pine landing gear mounts showing through notches cut sides Left The wing has positioned bolted Polyethylene sheet has taped over wing %2-in top strip has pinned place Formers F3A F3B have positioned lined up straightedge before gluing stringers place gluing strip Balsa former F4T has clothespinned place Right Balsa sheet has glued over F3A F3B Former CF has beehi glued along strips F4T lAin sides doublers triangles have glued place %2-in cockpit floor installed Left The %-in balsa sheet has attached CF F4T Note curve transition turtledeck sides under canopy Right layer 1/4in balsa sheet has glued top CF F4T in balsa cap has glued over side assembly June 1988 15 years after Kelehers design truck necessary flight gear turned plane wind let idle first captivated prototype model wing struts bolted along moment always have butterflies Lark ready its maiden flight show prop some picture taking new creation first salutes skies After changing prop fired up 65 excitement wanting see fly June 23 1988 Steen Airstrip south Saito checked rpm began taxiing pretty much kept bay time Texas unloaded Lark pickup Going far end grass strip 430 pm throttled model up 30 Model Aviation EZE2 E3 SORTS/3/TRX 119 TEASELEVATOR1IBO1AlIAWITE -~iLiI- ----ITIRH ELEVATOR TIE BAR 3/3233/8 WEBI/S1/4 IU2SS~ [v32][b-1-10-1-10]]-AU- -------- 3/32/ R6 3/ 32 X 3/6 REAR LARLOOI sItTYR ARTHURACTUAL LAYOUTIUPR STRUT SJLEFT WING T/16 WEB r1-3/TR - r I-I-S4H~ HI 585II ---I- T. 3/16 T/2GU 10- APF--1— ___I------- ___-ijI SOSUT ATTACI4 1/40112 SPRUCE P51 1116 PUTREOHESARE RARLEARLLSHWTH 7RAIRRO 1/AO1/2 SPRUCE A0- ----A-II [v32][b-1-10-1-10]]A REAR SPAR 3/1653/B SPRUCE II 1553/6A 10I ACRE RAREI I1/5015/16 1 SET/RATIFY13/T/IRII/2FIIHR STRAIGHT GRAIN BALSAISLITS PLY 13/THYRIRS 3-ASRIBS 7-6-SI6*LA1~ET54 12EAU129 _CD 7-H CD ALL RIBS 1/B MES C GRAIN BBS 1-2RIBS 6-TO SHY HUT BIRCH PLo 2IEAUZIEG CDCD 1/2 RRTTERN FOB 5440W PROP 1/453/4 1/B SHIMS 2 p1501/2 SPRUCE WIT LIGHT 3/16-801/2 RIBST 7 EIN /jI 16-P W2HRHSRS RR W2T 364 1I AT ATS 250 NOTE rn SALESSE0 KELEHER LARK JK1B SB4GLE PLACE HOSREWIILT MODEL SCALE 3 T BIT/B IAHI IRHRSRHA BA I/B T/BXT/ 3/T601/8 RUDDER 21 401/21/ R-31/R p 3/16EASIDEHAR-S 1/B SHAH FLRTNS WITRRRELHSR TSHSAUIN PROLAREABLBGOZ FOR 60 TONG F STRORE DESIGNED DRAWN BE BRAD SHEPHERD 1/16 VEST WE 1/16 PIT 3/A 3/3203/B ALS Tsp 3/ 32 SHE E 1/801/2/ IHASTRRRHH SORWE 3/16X 3/805-T/2 SPRUCE 3i K 3/IMS TIP 1/16MW I/A S0SRRRU P65441 EDGE OF - 1/SOIIG RIGHT WING RITA GUSSET 3/3203/B WEBBING I7 1/4 / Left Starting rough shape cabin Section under canopy front soft block has fitted curved top sheet top layer -in sheet over CF F4T has roughed out Right Fitting marking canopy final shaping cabin section Left Trimming inside cabin section final shape Note outside has sanded smooth clean joint between cabin turtledeck Also note line fitting canopy Right good view transition turtledeck cabin accom plished careful sanding front F4T photo also shows horizontal stabilizer under left wing construction quite clearly Left Detailing cockpit area 3A6-in dowel tube roll bar has installed start procedure takeoff placard has glued after coating wood roll bar zinc chromate green floor flat black Brad Polings likeness waiting behind right wing Right instrument panel has finished front decking has painted blue 1Ao x -in balsa band simulating fiberglass bow over top instrument panel has installed chromated turtledeck has finished side sheeting com pleted stringers place 3A6-in landing gear fairing core attached landing gear pilot has detailed installed headed down strip playing rud der slightly keep true about 100 ft before touching up eleva tor Lark flying let climb out farther feeding little right aileron trim made 180 turn came back over field moving sticks check re sponse 1800 turn other end brought back Response good entered loop steady-running Saito allowed nice round figure 01 Dad getting elated pulled up 450 climb snapped Doing perfect imitation full-scale Lark would snap stopped wing horizontal still going up 450 After four-point roll vertical climb pushed out slowed stall nosed down about fl0 recovered throttled back got pattern Things going well tell myself get carried away have brain drain very first flight first landing too eager sticks slipped model little out form rocking back forth bounc ing around model flipped last bounce due overcontrolling elevator fortunately no damage except little scuffing canopy worked out better way second flight setting airplane up fairly long ap proach after base keeping low reduced power until crossed edge strip cutting throttle letting settle Dont try three-point landing like did first flight Bring model down its main gear let tail settle slows second flight executed number 32 Model Aviation Left Close-up showing 3A6-in brass tubing rear landing gear strut radius filed ready wrapping soldering Right Building fairing cover landing gear bottom formers F2B F2C have installed sheeted Polyethylene sheet has laid over landing gear attach area former F3C has attached 3/8-in sidepieces pinned ready 1/4-in sheet Left The %-in sheet fill-in between landing gear mounts has installed three-layer Lite Ply fairing mount has attached along bottom stringers Right bottom fairing has sanded round front angular back transitions along bottom Careful sanding shaping will result smooth scalelike appearance photos finished airplane clearly show touch-and-goes taught set model up landing properly second flight demonstrated right power weight Lark will whatever maneuvers pilot capable put through works three-turn spin immediate recovery release nose down about 600 coming out outside snap rolls loops inside snaps top rolls knife-edge flight outside loops slow flybyswith modeling buddy Leon Folse taking pictures heard voice behind propose inverted flyby immediate reaction guy nuts Ive got six months love labor flying around out wants take picture inverted pass second flight same guy egged flying Chips Model Aviation June 1981 inverted test flightand Chips Lark Pleading temporary insanity again gave Leons reckless request got picture want fine-looking quarter-scale model has lot character wont bust budget wont require van trans port good flier look over plans consider Lark Its difficult model build final results wont disappoint Itll major contender Sport Scale Giant Scale contest may want enter youll still have July 1989 33 plywood formers foam block carved shape coat epoxy before applying fiberglass over off cowl lot effort expense recommended because quality cowl along strong 040 butyrate can opy wheel pants now available Tom Keeling T&D Fiberglass Specialties completed model its bare bones stage just prior covering As can seen f ished structure appears very strong airplane capable withstanding heavy use Leader Small Airfoil Technology MAStER AIRSCREW four series choose Master Airscrew offers full line propellers flying application made tough glass-filled nylon superior strength durability G/F SERIES Designed sport flyer G/F Series available 28 popular sizes 5-11 diameters K SERIES K Series designed 4 2 stroke applications Wide undercambered blades provide greater thrust slower turning 4 strokes 8 sizes including new 12 x 8 15 x 10 tips painted safety ANTIQUE SERIES performance series features scimitar shape swept back tips plenty undercamber s suitable application Sizes 12 x 6 13 x 6 14 x 7 16 x 7 new 10 x 5 11 x 6 gold glass-filled nylon 12 x 8 15 x 12 foldIng propellers geared systems 8 selffeathering adjustable pitch prop 05 direct drive give improved thrust glide less drag fixed blade props See Hobby Dealer MASTER AIRSCREW propellers accessories Windsor Propeller Company 384 Tesconi Court Santa Rosa CA 95401 great-looking model super weekend fly ing Construction Wing assure accuracy assem bling wing panels cut out set mas ter ribs /32 ply Mark rib its position panel after its cut out pre clude chance error building Pin piece A-in-sq balsa jig line shown Place 3/6-in shims under front bottom spar pin A-in-sq spar shims Cut small 900 triangle /32 ply use keep ribs vertical install ing spar Install top A-in sq spar pinning place after ribs have pinned A-in-sq jig bottom spar Install /8 x 1 /2-in trailing edge slots ribs satis fied assembly square straight use cyanoacrylate CyA glue joints Gap-filling CyA such Super Jet glue choice takes care irregularities introduced cutting out ribs Install glue %2 x 3A-in aileron spar cap place Pin /8 x %-in leading edge glue place Slide rear 46 x %-in spruce spar place glue Refer picture panel being assembled Cut out %2 x %-in diagonals glue place between ribs Glue /6 vertical-sheet webbing both sides spars Install -in gussets cor ners Sand bevel A-in leading edge conform ribs glue %2in leading edge sheeting place Turn panel over remove shims pin down jig ribs meet board stall leading edge sheeting aileron spar cap both panels have completed lay flat surface have drawn straight line over 70 long use piece Celotex job Pin panels down bottom spar along drawn line Use aliphatic resin epoxy glue rear spar spruce joiner spar stubs Clamp clothespins until dry Glue /8 x 1 in Lite Ply trailing edge joiner top trailing edges Glue x 7A x 6/2-in spar joiner tween main spars Epoxy x 1% x 6in ply joiner rear spars center section Glue x %-in leading edge halves together Glue %2 sheeting top center section aft spars Remove wing bench Glue aileron cranks place crank mounted Install V16 music wire pushrods Sheet bottom center section Note offset position aileron servo help ful counteracting weight sidemounted engine unnecessary twin cylinder Sand front leading edge sheeting flush /8 x 3A-in lead ing edge glue /8 x -in cap place Razor plane course-sand lead ing edge rounded shape Cut tips 3/6-in lightweight sheet balsa using WT- 1 rib outline Cut 34 Model Aviation ELECTRIC SERIES HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP WT-2 rib %-in sheet two WT-3 WT-4 lightweight -in sheet Glue WT-2 place shown glue tip WT- 1 position bot tom edge lining up bottom A-in leading edge bottom trailing edge rib No 10 Note photo tip parts assembled wing Disregard WT-5 piece photo using two pieces WT-4 instead per plan Sand WT-3 pieces conform No 10 rib glue Y32in tip sheeting place Sand tip rounded shape per cross section dia gram WT-2 Build ailerons directly over plans after installing ribs onto /8 x 1-in trailing edge lining up Tail surfaces Cut outlines shape glu ing x -in spars together make /2-in sandwich method construc tion reduces chance warped spars caused using solid -in piece Notch spars assemble surfaces over plans sandwich-type construction elevator rudder results very strong lightweight structure appears realistic covered Install hinges finished fuselage built using one-side-ontop-of-the-other routine After Lite Ply doubler A-in balsa sides have cut out glued together insert waxed paper between sides build directly over plan Dont forget gluing up ply balsa forward side pieces have both right side left Con tact cement used pieces prototype CyA applied around edges Separate sides finished pin down over top view former F-4 tail post Trial fit F-4 trim needed Check fit F4-B sand angle bottom snug fit F-4 Cut temporary angles scrap balsa pin place behind F-4 loca tion Epoxy F-4 place epoxy F4-B top F-4 positioned against gles Use 900 angle get tail post square glue sides together Cut aft fuselage crosspieces place over plan noting difference width top bottom shown photos plans Again discrepan cies show up between photos plans always follow plans reflect changes made after photos taken Glue /8 x -in diagonals place shown top view Pin F-5 F-6 position trial fit stringers straightness Pin F-7 place trial fit /6 x 3A-in top longerons Trim form ers necessary good fit Glue stringers formers longerons place Place F-i slots sides pull sides together using rubberband lock F-t Slide former F-3 place pinning bottom sides securely will pull meet F-3 firmly youre satisfied fit DWBRO TRIPSPIN KEEPS YOU IN Quick easy assemble Universal Designed balance items listed above special accessories Strong stable durable balancing wheels recessed prevent damage accidently dropped Du-Bros Tm- Spin prop balancer adjustable vertically horizontally conform balancing need Truly precision instrument built modelers expect very best Available now local hobby shop BALANCES AIRPLANE PROPSALL SIZES JET FANS BOAT PROPS HELICOPTER ROTOR HEADS SPINNERS CAR WHEELS AND MOTOR GEARS DU-BRO PRODUCTS INC 480 Bonner Road onda IL 60084 July 1989 35 BALANCE Specially designed locking cone securely centers locks props onto balancing shaft utmost accuracy PRECISION MODEL PRODUCTS pa USA BARSTOCK ALUMINUM SPINNERS Pan NoSize TI-iSO-B 112 TT-175-8 /4 TT-200-B 11-225-B .. 2-1/4 11-226-B 1/4 FAt 11-250-B .. 2-1/2 11-251-B .. 2-1/2FAI 75-B 3/4 11-276-B 3/4 FAI .. 11-300-B 11-301-B FAll 11-325-B -1/4 11-350-B -1/2 11-375-B /4 00-B 4 RetailApprox PriceWeight $1395058 oz 1495095oz 1595100oz 1695160oz 1895150ez 1895190oz 2095170oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz S99S520 oz 6995S70 oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner Part NoSize 11-140-A .1/4-28 11-147-A 1/4-28/7mm 11-610-A6 x 1 0mm 11-710-A-7 x 1 0mm 11-516-A5/16-24 11-516-A5/16-24/8mm 11-810-A8x 10mm 11-825-A8x 125mm 11-375-A3/8-24 11-125-AlOx 125mm RetailApprox PriceWeight S495 . 061 oz 495 . z 495 . 063 oz 495 . oz 4950 76 oz 495076oz 495076oz 495075oz 595117oz 595115ox 3 Pieces Nut Washer aird Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 squareness epoxy F-3 position Glue A-in Lite Ply fuel tank base former F-2 keeping 900 former Check fit maple engine mounts through F-i F-2 F-3 choose use firewall commercial mount omit cut outs formers keep same center lines installing mount F- 1 Remove F-l F-2 structure Install fuel tank base former F2 Position F-2 slots pull sides gether rubberband install F-i slots Install engine mount pieces through holes epoxy formers maple stock Use CyA hold tank place silicone can used later final tank installation Stuff piece foam around fuel tank tubing outlet hole F1 epoxy seal off fuel-proof firewall smoker tank installed proto type future use Disregard photos showing tank tubing outlets unless also want include model Re move fuselage structure plans Glue A-in-sq spruce slots top formers F- 1 F-2 F-3 Lay / x A-in stringers place over F-i F-3 cut slots F-2 receive glue place Note photo stringers installed Glue F2-S F35 F3B-S sides Glue -in pine landing gear mounts place us ing liberal amounts epoxy Cut 4, ply sheeting over F-i F-2 using pattern plans Note grain make easier wrap around formers photos shows sheet ing place %2 balsa sheeting being installed behind ply Glue spruce cowl hold-down blocks place flush ply against F-2 Glue %2-in wing saddle strips place Glue FB Lite Ply pieces doublers F-3 Glue % x 3A-in maple blocks wing hold-downs FB F3 using epoxy Epoxy WM Lite Ply pieces fuselage % x 3A-in ma ple block underneath Place wing saddle pin place temporarily lining up trailing edge center centerline former F4B Square wing fuselage mea suring tail post No 10 rib trailing edge Pin firmly drill rear hold-down bolt hole using Y6-in bit Re move wing drill enlarge Y16-in hole wing trailing edge in Tap maple block 4-20 threads Reinstall wing bolt down trail ing edge Square wing again pin firmly Drill front hole fit piece Y16-in dowel Drill matching hole remove wing enlarge both wing holes 14 tap maple blocks /4 -20 Bolt wing place lay sheet polyethylene over wing center section shown photo Again referring photos pin top %2-in balsa strips place wing between F-3 F4-B Pin F3-A place checking fit against F3 Pin F3-B place checking fit straightedge F3-B forward F-2 ensure continuity top sheeting Sand trim necessary Install A-in-sq top balsa stringer two side / x A-in stringers shown photos Cut off rear portion top cabin strip F3-B F-4 Cut cabin cockpit sides lightweight -in sheet balsa using outline side view plan former F3-B CF Cut front rear h-in sheet doublers lightweight stock using cabin side pattern Glue place making right left side Glue lightweight 34-in trian gle stock top edge sides re ferring photos Draw lines polyethylene sheet former F3-B F4-B felt-tip pen Pin sides lines pin former CF back sides Place F4T against F4-B holding clothespin temporarily shown photo Glue two pieces / x 3A-in stock between CF F4-T two A-in pieces substi tuted single A-in piece glue line can used reference point shaping cabin area Glue sides CF F3-B Glue %-in side sheet between CF F4-T wetting wood fit curve neces sary Glue A-in sheet doubler side sheet Glue x 1-in cap top side Glue two-piece A-in sheet top CF aft F4-T per photo Glue %2-in sheet cabin floor place checking fits well sides Glue 34 x 1 /2-in soft block piece sides front F3-B sanding insides fit curve sheeting Rough cut exterior sides using pattern shown plans Refer photo showing desired shape soft block front Rough sand bumps out cabin area sides taking care dig wing sheeting Sheet sides F4-B aft tail post Remove cabin area polyethy lene sheet plan Make cutouts F3-A hold-down blocks lo cated Epoxy maple blocks F-3 epoxy piece /e-in Lite Ply inside %2in side sheeting blocks meet Drill through sheet blocks tap latter 4-40 bolts Enlarge hole side sheet 4-40 bolt well Glue -in top sheet turtleback place glue ply hold-down plate A-in dowel top cabin sheet Drill through dowel ply enlarge ply hole insert blind nut Screw cabin structure onto fuselage assembly Fair cabin areas side sheeting using 180-grit paper little patience careful sanding will make nice smooth transition turtle hump cabin area Place canopy over cabin structure trimming good fit along glue line Mark canopy outline pen carve inside area about A-in thickness sharp knife finish sandpaper hardest part building 36 Model Aviation PROP NUT ADAPTORS V model finished can now take fun break doll up cockpit floor painted flat black sides green zinc chromate color headache rack built using piece 3A6-in alumi num tubing top radius 346-in doweling painted zinc chromate re mainder instrument panel painted almond color shown detail color photos Mask off paint sheeting over front cockpit same blue will used final exterior finish prototype used Red Devil polyurethane Empire Blue Sigs Blue Sky Bright also close color Polings full-scale Lark simulate fiberglass band fullsize plane piece 46-thick %-in wide balsa laid across top curved glued ends painted chromate Williams 3-in-scale sport pilot used dressed up piece balsa block glued bottom shaped raise pilot proper height parachute painted red match red shoelaces used straps shoulder straps black shoelaces Starting Before Takeoff placard shown photo finished cockpit glued wall before gluing canopy canopy tinted hot water black Rit dye careful make too dark Swish canopy around large roasting pan little remove rinse cold water isnt dark enough repeat process until youre satis fied full-scale Lark has just sugges tion tint canopy prototype glued Testors cement green tube variety Any similar model ce ment should work just well Mask off canopy above paint line protect Finishing fuselage Install string ers glue F3-C F2-B F2-C place sheet section i/ x -in spruce strips may glued pine landing gear blocks Install /8-in sheet between blocks fill-in File 346-in brasstubing enclose main landing gear wire wrap soft wire shown plan photo Place gear slots pine blocks holding place screwing three -in brass strips leg using commercial straps Build cover over gear per photos plans Glue three-ply hold block 1A-in sheet balsa fill-in Drill down through fairing block tap block 4-40 bolt Screw fairing place sand ing fit F2-C F3-C formers photos shows foam form shaping cowling using one-off meth od Believe folks aint worth considering cost foam boat glass epoxy hours sanding filling cutting holes etc T&D Fiberglass Specialties fers ready-to-finish cowl sample Tom Keeling sent fit fuselage per fectly would highly recommend purchas ing cowl wheel pants canopy Tom T&D canopy formed 040 material beaut requiring slight trimming perfect fit tried mold canopy 15 times before finally giv ing up easier cover tail surfaces before installing fuselage Sig Koverall nitrate dope used model excellent results After bolting wing slip stabi lizer place ensuring its square trailing edge wing level wing Make certain stabilizer true before gluing place Slip el evator used Klett pinpoint hinges secur ing aliphatic resin Install fin its slot squaring tail post us ing 900 angles side assure square ness stab Make up tail wheel assembly glue place use commercial assemblies securing ply plate epoxied fuselage bottom Install rudder glue hinges prototype given two coats ni trate dope wherever Koverall met structurethat ribs leading edge sheet tips trailing edge fuselage stringers front sheeting turtledeck sheeting Af ter sanding 220-grit paper Koverall installed brushing nitrate through material contact points iron set medium heat beauty taut covering immediately apparent magic Thats uppers building stick-and-rag models Five coats thinned nitrate brushed entire model coat thinned nitrate mixed talcum powder pure kind starch applied sanded smooth 220 Tri-M-ite followed three coats ni trate sanded 360-grit paper Finally sprayed polyurethane mist coat fol lowed fairly wet doubt could have applied red stripes Coverites Graphic Stripes 6-in sizes right mark scale appearance red ex actly matches color full-scale plane stripes joy apply eliminate masking spraying would otherwise required Theyre no thicker coat paint have beau tiful gloss Prime Time lettering Polings name hand painted 0-size long haired sable brush using Sig Skybright Yel low bottom half mixing red create orange top half reg istration numbers letters -in Hel vetica No 411 Presto Stik Vinyl letters found office supply stores Use 030-in music wire wire brac ing tail feathers %-in length %2in brass tubing flattened end drilled hole soldered wire No 2 screws used hold brac ing through holes drilled hardwood mounts ply reinforcements stab fin No 32 straight pins Sig se cured aliphatic resin used sheeted parts simulate Dzuz fasteners PK screws driven metal Continued page 141 New Rocket Uses B C andD Engines. Capability No Else Offers MRC s recent introduction 25 Moonbiaster inter mediate kit brings yet another technological advance MRCs Computer Aided Designs CAD built carry B4-2 C6-3 engines However Moonbiaster also commercially sold rocket kit includes easy-touse adapter also allows louse powerful Dengines Builtto take blast Moon blaster features large die-cut balsa fins blowmolded nose cone superb space capsule detailing Self stick decals 18chute Send free catalog See full line advanced MRC rockets hobby dealer cant help callus directly MRCe Model Rectifier Corporation 2500 Woodbridge Ave Edison NJ 08817 201 985-7800 July 1989 37 Safety/Preston Continued page 20 types animals including birds Nobody can predict time hot spots 1989 season will since known hot spots close us would wise outdoor modelers know something about disease what to avoid what symptoms aware First avoidance cant avoid encounter ing ticks small over place pet owners know However ob serving few precautions can keep ing bitten and/or infected Actions will keep ticks off skin effective preventa tive measures Ticks dwell low shrubbery grass blades get onto shoes kles lower legs crawl upward Wear long pants cinched ankle tucked socks boots less access skin bet ter Check clothing frequently especially youve through field brush retriev ing downed airplane Wearing light-colored clothing makes easier spot little devils Repellents containing Deet can used effec tively clothing shoes pants socks di rect application high concentrations skin advised new product Permanone available may effective Applied clothing both repels kills ticks After day field check feet kles legs attached ticks tick nymphs about size pinhead feeding Any find should removed imme diately fine curved-tip tweezer Grasp tick close possible its mouth part sticking skin pull outward firmly jerking Alternate methods tick re moval alcohol heat vaseline etc popular past have shown less effective good removal fast removal less chance infection Immediately after removing tick disinfect bite rubbing alcohol betadine Unfortunately victims never see tick infects symptoms Lyme dis ease include various types rash may de velop weeks after infection fatigue stiff neck flu-like symptoms headache chills fever muscle aches arthritislike symptoms difficult disease victims recognize doctor diagnose pattern symp toms varies widely case case symptoms mimic other illnesses See doctor symptoms lead suspect have disease Early treatment effec tive Untreated disease progressive can become serious its advanced stages Jesse also sent copy article Lyme disease appeared Consumer Reports June 1988 pages 382-385 Another article disease can found March 1 1989 sue American Nurseryman feature article article states New York Medical College investigating connec tion between Lyme disease multiple sclerosis MS both have similar symptoms alert ticks have safe month Lark/Shepherd Continued page 37 Brads plane scimitar show prop carved piece 2 x 12-in white pine shelving material covered multi ple coats nitrate high-gloss finish painted same white used model Designing building beguiling air plane very satisfying enjoyable Though problems cropped up solving could frustrating times playing Daedelus definitely worth too can have quarter-scale model beauti ful home-builtand fly off work bench instead drawing board Whats wont need cargo van carry flying fieldor contest site En joy building flying unique little Lark Radio Technique/Myers Continued page 41 5 A-in disk Microsoft 9 Sector format usable IBM PCs compatibles Other formats may available need Ask WIMP will ASCII accompanied handbook will have some hints conver sions other computers files disk RC Slope Soaring/Triebes Continued page 47 instant perfection successful flight landing hinting promise things come knew what next couple hand tosses Continued page 144 July 1989 141
Edition: Model Aviation - 1989/07
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 141
NO OCR TEXT NO OCR TEXT aileron servo seen has delib erately installed off-center help counter act weight side-mounted engine Top view stab/elevator showing brace wires terminals registration numbers /4-in Presto vinyl stick-ons desire build own airplane undi minished 1975 Brad began researching home-builder designs As research contacts home builders broadened found himself repeatedly turning good look landing gear mounting ar rangement along spreader bar Note wing strut -in brass mounts behind rear leg screwed l/ x -in spruce strip three-ply fairing holddown block exhaust pipes can seen close-up rudder/elevator assem bly shows -in brass mounts termi nals 030 music wire bottom brace pushrod exit slot rudder horn tail wheel assembly tail wheel homebrew assembly commercial unit appropriate size would serve just well Lark ideal projecta conservative de sign strongly built good performance low power easy fly Brad pur chased set plans went work contacted Ron Darcy help him through much construction process knowing weld en rolled night course community college started practicing scraps 26 Model Aviation Radio equipment stored away aTt ena bay Plans show exact location Author/designer Brad Shepherd Victoria TX Prime Time Only four months after its initial flight tests airplane took top honors October 1988 Scale Rally Austin TX real testament authors design skills craftsmanship piloting ability / Wheel pant installation showing radius pant inside face along two screws going through Sig wheel mount Exhaust stack fittings made -in brass strip high-temp soldered %-in brass tubing pipe engine ex haust other crankcase breather Aluminum-painted fairing witn *s pin heads screwheads closely simulates Polings full-scale Lark wing walk black Coverite Graphic roughed 180 grit no step dry-transfer lettering red striping Coverite Graphic stripes &RITO 65 4- TROK 3/&/4lflPk FIERGLA&Q \ \ - UTPLY Y4&Q&PAR N RPER TORRR N 94x3/8 QPRUCE S fl 8IIEET K \ Xz &HEET K \\\ \$7.iT2 6 7II 7/ ERGLR& CORE Left The right wing panel parts assembled glued up center section excess hasnt cut off yet Right left right panels being attached Note plywood plate over 1/8-in trailing edge rear spar spruce doubler -in sheet between spars Left The left wing tip showing -in WT-2 angle rib -in edge pieces glued 346-in WT-1 Follow plans discrepancy between drawing what see pictures Right fuselage sides being built over plans top other wax paper between best way assure two sides will identical resulting true fuselage assembled 4130 tubing time course completed ready start welding fuselage As quickly realized Brad thrown himself squarely uncompromising world big airplane construction No room Kelehers excellent plans gimmicky Mickey Mouse-type setups tubing sizes large home-built wing spar plenty beefy Brad put lust hellishly stout airplane Two other people deserve credit efforts assisting Brad progressed project A&P mechanic Jim Waiter kept him course lot little things dur ing Brads three-year stint companys headquarters Chicago good friend Larry Pennock made instruments work helped details did finish painting novel departure standard construc tion practice elimination rib stitching wing gluing 1 -in cap strips ribs gluing fabric caps After doping preliminary work including cowling metal parts finished Larry sprayed air craft Du Pont Centauri acrylic enamel turned out glossy Brad has never felt need rub out Since Larry Pinnock flying ex perience elected first flight honors Neither Larry nor Brad flown tail-dragger before both checked out first Super Cub Larry no problems Larks first flight pronounced aircraft real dandy Heres Brads panegyric after first flight Before off end runway Napa knew easy airplane fly Its very stable just outrageously easy handle Landing have such great visibility its hard get really out shape once youre ground rolls out beautifully Its twitchy Since sit centerline fuse lage can instantly detect drift crosswind correct before get trouble Its very very docile air plane During designing drawing build ing phases kept hoping upbeat words about full-scale Larks flight would carry through models charac teristics After six months drawing cut ting gluing fitting refitting redrawing etc finally have answer 28 Model Aviation sides pinned down over plans top view formers F4 F4B glued place along -in balsa gussets turtledeck formers temporarily pinned place will eventually moved shown plans during later phase construction good view showing downward angle sides fuselage being assembled COA3 LINE NOTE F-3A F39 8jITE FTO F 1/LITE PLY SHAPE AT COWL LINE r1IIIIII~ ~T/TGA TA NO NONE F1TFTF-OS3OS3~F NO'j11111111112111111111j12FRRALSA 33 SAD 10 RPL SOTJNEER 5301305ROT 50033025ROTI I25I J 3803/ ON 3/30 ALUMMOPE WM PlATES O EDT3532134A P NE NOflOM H M PLERTAOS ETRP 1/GRALSA S EPOXY WELL PA T8BALOA FOR BA TAT7i74I FE ADOB 32/ELITE PLY FOEBALSA/32NE________ -ROOT -TX P ALL DIAGONALS ARE 11051/0 FAR3/32 TSP ST IPWHEN BITLOING COBIN ON WINO i 05p{3TF-3RTWIU0321145 3 /T6ALUM TOEING POR RADIOS /CFT/BALSAFROM /TAO FINEROLASS 30905 BLOCK SEPT 0 3034313201343132GARDENCITY MI ART3SOIT/ATHEET II3AOFAF-SLIGHT I/O OGlEALLTOPFWTMER STRINGERS----3- ~ .--- -PH ATE STRAIGHTEDGE ALONOOMITTED FOR CLARITYpo--OUTMO 313FT1/A SLOT FOR FIN LA TSP OF FUSE WHEN FITONOFTIAI /I J\----\ ____-AL\ COWL--- IAA32SPRJCEIIAtLIAAT ADA 1341133 CF TM1I"IRLITEFLT- i 33AFLEMLOACTR I TFAR01430 T3F3I1 MTDEET3 3-332353 SUMORAODLU& OF OARLAR -I32433 I332ON-ZYEDMFATMLEI33/tj5 -- - - 33F 3D RRADRTSTOA3-OIMEN32ORIIRLITEPLT 0132FR----- SOARIR IS TSR SAnTA-IRISIM332DTBLFTSTRTT450800KAFMSRRAI MAKE CORRECTION IFIAO1INOAT1IOXT/0 ASEICIIRA/i32ONRLED3T- 3-T13 0t13231R13R001301 ATTACI ~ IRCOCSOSTORI -OCASISESOSFER iCOOCCO I135iCEAT 00033 \-13321 I UtOMOSS STRIP FIREGGLASS COWL &WHEELRRO3TS TAD FIREOGLASS[1fl 30925 RLSCK SEPTAEMARSIDN N TARSEN CITY ML0GT3OIAMNLSOSOENTI33030505BLAB KELEHER LARK K 2 SECTION OF LE PLACE NOEREBOIL MMAIODRS&EFOOT DEL SCALE -3T F a758 SOINPROLAREA-R FOR 00 OTSO POOR SIB ORE 3235 MMI343RDESIG13ED&DRAWNRY BRAS SHEPHERD DARED 0100Mi______________________________________ 323241013 ED43Dis32/33LFM Left Formers Fl 2 3 have inserted side panels glued place along maple engine mount stock slots top stringers former F-2 cut after formers place adjusted straightedge across top three tubing jutting out under engine mount stock attached tank will used smoke system installed later date Right side formers have installed along %2-in balsa sheeting 1/64-in plywood has wrapped around formers F-i F-2 glued place engine mount holes have drilled engine has temporarily installed order fit fiberglass cowl %2-in saddle strip wing opening glued place Note pine landing gear mounts showing through notches cut sides Left The wing has positioned bolted Polyethylene sheet has taped over wing %2-in top strip has pinned place Formers F3A F3B have positioned lined up straightedge before gluing stringers place gluing strip Balsa former F4T has clothespinned place Right Balsa sheet has glued over F3A F3B Former CF has beehi glued along strips F4T lAin sides doublers triangles have glued place %2-in cockpit floor installed Left The %-in balsa sheet has attached CF F4T Note curve transition turtledeck sides under canopy Right layer 1/4in balsa sheet has glued top CF F4T in balsa cap has glued over side assembly June 1988 15 years after Kelehers design truck necessary flight gear turned plane wind let idle first captivated prototype model wing struts bolted along moment always have butterflies Lark ready its maiden flight show prop some picture taking new creation first salutes skies After changing prop fired up 65 excitement wanting see fly June 23 1988 Steen Airstrip south Saito checked rpm began taxiing pretty much kept bay time Texas unloaded Lark pickup Going far end grass strip 430 pm throttled model up 30 Model Aviation EZE2 E3 SORTS/3/TRX 119 TEASELEVATOR1IBO1AlIAWITE -~iLiI- ----ITIRH ELEVATOR TIE BAR 3/3233/8 WEBI/S1/4 IU2SS~ [v32][b-1-10-1-10]]-AU- -------- 3/32/ R6 3/ 32 X 3/6 REAR LARLOOI sItTYR ARTHURACTUAL LAYOUTIUPR STRUT SJLEFT WING T/16 WEB r1-3/TR - r I-I-S4H~ HI 585II ---I- T. 3/16 T/2GU 10- APF--1— ___I------- ___-ijI SOSUT ATTACI4 1/40112 SPRUCE P51 1116 PUTREOHESARE RARLEARLLSHWTH 7RAIRRO 1/AO1/2 SPRUCE A0- ----A-II [v32][b-1-10-1-10]]A REAR SPAR 3/1653/B SPRUCE II 1553/6A 10I ACRE RAREI I1/5015/16 1 SET/RATIFY13/T/IRII/2FIIHR STRAIGHT GRAIN BALSAISLITS PLY 13/THYRIRS 3-ASRIBS 7-6-SI6*LA1~ET54 12EAU129 _CD 7-H CD ALL RIBS 1/B MES C GRAIN BBS 1-2RIBS 6-TO SHY HUT BIRCH PLo 2IEAUZIEG CDCD 1/2 RRTTERN FOB 5440W PROP 1/453/4 1/B SHIMS 2 p1501/2 SPRUCE WIT LIGHT 3/16-801/2 RIBST 7 EIN /jI 16-P W2HRHSRS RR W2T 364 1I AT ATS 250 NOTE rn SALESSE0 KELEHER LARK JK1B SB4GLE PLACE HOSREWIILT MODEL SCALE 3 T BIT/B IAHI IRHRSRHA BA I/B T/BXT/ 3/T601/8 RUDDER 21 401/21/ R-31/R p 3/16EASIDEHAR-S 1/B SHAH FLRTNS WITRRRELHSR TSHSAUIN PROLAREABLBGOZ FOR 60 TONG F STRORE DESIGNED DRAWN BE BRAD SHEPHERD 1/16 VEST WE 1/16 PIT 3/A 3/3203/B ALS Tsp 3/ 32 SHE E 1/801/2/ IHASTRRRHH SORWE 3/16X 3/805-T/2 SPRUCE 3i K 3/IMS TIP 1/16MW I/A S0SRRRU P65441 EDGE OF - 1/SOIIG RIGHT WING RITA GUSSET 3/3203/B WEBBING I7 1/4 / Left Starting rough shape cabin Section under canopy front soft block has fitted curved top sheet top layer -in sheet over CF F4T has roughed out Right Fitting marking canopy final shaping cabin section Left Trimming inside cabin section final shape Note outside has sanded smooth clean joint between cabin turtledeck Also note line fitting canopy Right good view transition turtledeck cabin accom plished careful sanding front F4T photo also shows horizontal stabilizer under left wing construction quite clearly Left Detailing cockpit area 3A6-in dowel tube roll bar has installed start procedure takeoff placard has glued after coating wood roll bar zinc chromate green floor flat black Brad Polings likeness waiting behind right wing Right instrument panel has finished front decking has painted blue 1Ao x -in balsa band simulating fiberglass bow over top instrument panel has installed chromated turtledeck has finished side sheeting com pleted stringers place 3A6-in landing gear fairing core attached landing gear pilot has detailed installed headed down strip playing rud der slightly keep true about 100 ft before touching up eleva tor Lark flying let climb out farther feeding little right aileron trim made 180 turn came back over field moving sticks check re sponse 1800 turn other end brought back Response good entered loop steady-running Saito allowed nice round figure 01 Dad getting elated pulled up 450 climb snapped Doing perfect imitation full-scale Lark would snap stopped wing horizontal still going up 450 After four-point roll vertical climb pushed out slowed stall nosed down about fl0 recovered throttled back got pattern Things going well tell myself get carried away have brain drain very first flight first landing too eager sticks slipped model little out form rocking back forth bounc ing around model flipped last bounce due overcontrolling elevator fortunately no damage except little scuffing canopy worked out better way second flight setting airplane up fairly long ap proach after base keeping low reduced power until crossed edge strip cutting throttle letting settle Dont try three-point landing like did first flight Bring model down its main gear let tail settle slows second flight executed number 32 Model Aviation Left Close-up showing 3A6-in brass tubing rear landing gear strut radius filed ready wrapping soldering Right Building fairing cover landing gear bottom formers F2B F2C have installed sheeted Polyethylene sheet has laid over landing gear attach area former F3C has attached 3/8-in sidepieces pinned ready 1/4-in sheet Left The %-in sheet fill-in between landing gear mounts has installed three-layer Lite Ply fairing mount has attached along bottom stringers Right bottom fairing has sanded round front angular back transitions along bottom Careful sanding shaping will result smooth scalelike appearance photos finished airplane clearly show touch-and-goes taught set model up landing properly second flight demonstrated right power weight Lark will whatever maneuvers pilot capable put through works three-turn spin immediate recovery release nose down about 600 coming out outside snap rolls loops inside snaps top rolls knife-edge flight outside loops slow flybyswith modeling buddy Leon Folse taking pictures heard voice behind propose inverted flyby immediate reaction guy nuts Ive got six months love labor flying around out wants take picture inverted pass second flight same guy egged flying Chips Model Aviation June 1981 inverted test flightand Chips Lark Pleading temporary insanity again gave Leons reckless request got picture want fine-looking quarter-scale model has lot character wont bust budget wont require van trans port good flier look over plans consider Lark Its difficult model build final results wont disappoint Itll major contender Sport Scale Giant Scale contest may want enter youll still have July 1989 33 plywood formers foam block carved shape coat epoxy before applying fiberglass over off cowl lot effort expense recommended because quality cowl along strong 040 butyrate can opy wheel pants now available Tom Keeling T&D Fiberglass Specialties completed model its bare bones stage just prior covering As can seen f ished structure appears very strong airplane capable withstanding heavy use Leader Small Airfoil Technology MAStER AIRSCREW four series choose Master Airscrew offers full line propellers flying application made tough glass-filled nylon superior strength durability G/F SERIES Designed sport flyer G/F Series available 28 popular sizes 5-11 diameters K SERIES K Series designed 4 2 stroke applications Wide undercambered blades provide greater thrust slower turning 4 strokes 8 sizes including new 12 x 8 15 x 10 tips painted safety ANTIQUE SERIES performance series features scimitar shape swept back tips plenty undercamber s suitable application Sizes 12 x 6 13 x 6 14 x 7 16 x 7 new 10 x 5 11 x 6 gold glass-filled nylon 12 x 8 15 x 12 foldIng propellers geared systems 8 selffeathering adjustable pitch prop 05 direct drive give improved thrust glide less drag fixed blade props See Hobby Dealer MASTER AIRSCREW propellers accessories Windsor Propeller Company 384 Tesconi Court Santa Rosa CA 95401 great-looking model super weekend fly ing Construction Wing assure accuracy assem bling wing panels cut out set mas ter ribs /32 ply Mark rib its position panel after its cut out pre clude chance error building Pin piece A-in-sq balsa jig line shown Place 3/6-in shims under front bottom spar pin A-in-sq spar shims Cut small 900 triangle /32 ply use keep ribs vertical install ing spar Install top A-in sq spar pinning place after ribs have pinned A-in-sq jig bottom spar Install /8 x 1 /2-in trailing edge slots ribs satis fied assembly square straight use cyanoacrylate CyA glue joints Gap-filling CyA such Super Jet glue choice takes care irregularities introduced cutting out ribs Install glue %2 x 3A-in aileron spar cap place Pin /8 x %-in leading edge glue place Slide rear 46 x %-in spruce spar place glue Refer picture panel being assembled Cut out %2 x %-in diagonals glue place between ribs Glue /6 vertical-sheet webbing both sides spars Install -in gussets cor ners Sand bevel A-in leading edge conform ribs glue %2in leading edge sheeting place Turn panel over remove shims pin down jig ribs meet board stall leading edge sheeting aileron spar cap both panels have completed lay flat surface have drawn straight line over 70 long use piece Celotex job Pin panels down bottom spar along drawn line Use aliphatic resin epoxy glue rear spar spruce joiner spar stubs Clamp clothespins until dry Glue /8 x 1 in Lite Ply trailing edge joiner top trailing edges Glue x 7A x 6/2-in spar joiner tween main spars Epoxy x 1% x 6in ply joiner rear spars center section Glue x %-in leading edge halves together Glue %2 sheeting top center section aft spars Remove wing bench Glue aileron cranks place crank mounted Install V16 music wire pushrods Sheet bottom center section Note offset position aileron servo help ful counteracting weight sidemounted engine unnecessary twin cylinder Sand front leading edge sheeting flush /8 x 3A-in lead ing edge glue /8 x -in cap place Razor plane course-sand lead ing edge rounded shape Cut tips 3/6-in lightweight sheet balsa using WT- 1 rib outline Cut 34 Model Aviation ELECTRIC SERIES HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP WT-2 rib %-in sheet two WT-3 WT-4 lightweight -in sheet Glue WT-2 place shown glue tip WT- 1 position bot tom edge lining up bottom A-in leading edge bottom trailing edge rib No 10 Note photo tip parts assembled wing Disregard WT-5 piece photo using two pieces WT-4 instead per plan Sand WT-3 pieces conform No 10 rib glue Y32in tip sheeting place Sand tip rounded shape per cross section dia gram WT-2 Build ailerons directly over plans after installing ribs onto /8 x 1-in trailing edge lining up Tail surfaces Cut outlines shape glu ing x -in spars together make /2-in sandwich method construc tion reduces chance warped spars caused using solid -in piece Notch spars assemble surfaces over plans sandwich-type construction elevator rudder results very strong lightweight structure appears realistic covered Install hinges finished fuselage built using one-side-ontop-of-the-other routine After Lite Ply doubler A-in balsa sides have cut out glued together insert waxed paper between sides build directly over plan Dont forget gluing up ply balsa forward side pieces have both right side left Con tact cement used pieces prototype CyA applied around edges Separate sides finished pin down over top view former F-4 tail post Trial fit F-4 trim needed Check fit F4-B sand angle bottom snug fit F-4 Cut temporary angles scrap balsa pin place behind F-4 loca tion Epoxy F-4 place epoxy F4-B top F-4 positioned against gles Use 900 angle get tail post square glue sides together Cut aft fuselage crosspieces place over plan noting difference width top bottom shown photos plans Again discrepan cies show up between photos plans always follow plans reflect changes made after photos taken Glue /8 x -in diagonals place shown top view Pin F-5 F-6 position trial fit stringers straightness Pin F-7 place trial fit /6 x 3A-in top longerons Trim form ers necessary good fit Glue stringers formers longerons place Place F-i slots sides pull sides together using rubberband lock F-t Slide former F-3 place pinning bottom sides securely will pull meet F-3 firmly youre satisfied fit DWBRO TRIPSPIN KEEPS YOU IN Quick easy assemble Universal Designed balance items listed above special accessories Strong stable durable balancing wheels recessed prevent damage accidently dropped Du-Bros Tm- Spin prop balancer adjustable vertically horizontally conform balancing need Truly precision instrument built modelers expect very best Available now local hobby shop BALANCES AIRPLANE PROPSALL SIZES JET FANS BOAT PROPS HELICOPTER ROTOR HEADS SPINNERS CAR WHEELS AND MOTOR GEARS DU-BRO PRODUCTS INC 480 Bonner Road onda IL 60084 July 1989 35 BALANCE Specially designed locking cone securely centers locks props onto balancing shaft utmost accuracy PRECISION MODEL PRODUCTS pa USA BARSTOCK ALUMINUM SPINNERS Pan NoSize TI-iSO-B 112 TT-175-8 /4 TT-200-B 11-225-B .. 2-1/4 11-226-B 1/4 FAt 11-250-B .. 2-1/2 11-251-B .. 2-1/2FAI 75-B 3/4 11-276-B 3/4 FAI .. 11-300-B 11-301-B FAll 11-325-B -1/4 11-350-B -1/2 11-375-B /4 00-B 4 RetailApprox PriceWeight $1395058 oz 1495095oz 1595100oz 1695160oz 1895150ez 1895190oz 2095170oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz S99S520 oz 6995S70 oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner Part NoSize 11-140-A .1/4-28 11-147-A 1/4-28/7mm 11-610-A6 x 1 0mm 11-710-A-7 x 1 0mm 11-516-A5/16-24 11-516-A5/16-24/8mm 11-810-A8x 10mm 11-825-A8x 125mm 11-375-A3/8-24 11-125-AlOx 125mm RetailApprox PriceWeight S495 . 061 oz 495 . z 495 . 063 oz 495 . oz 4950 76 oz 495076oz 495076oz 495075oz 595117oz 595115ox 3 Pieces Nut Washer aird Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 squareness epoxy F-3 position Glue A-in Lite Ply fuel tank base former F-2 keeping 900 former Check fit maple engine mounts through F-i F-2 F-3 choose use firewall commercial mount omit cut outs formers keep same center lines installing mount F- 1 Remove F-l F-2 structure Install fuel tank base former F2 Position F-2 slots pull sides gether rubberband install F-i slots Install engine mount pieces through holes epoxy formers maple stock Use CyA hold tank place silicone can used later final tank installation Stuff piece foam around fuel tank tubing outlet hole F1 epoxy seal off fuel-proof firewall smoker tank installed proto type future use Disregard photos showing tank tubing outlets unless also want include model Re move fuselage structure plans Glue A-in-sq spruce slots top formers F- 1 F-2 F-3 Lay / x A-in stringers place over F-i F-3 cut slots F-2 receive glue place Note photo stringers installed Glue F2-S F35 F3B-S sides Glue -in pine landing gear mounts place us ing liberal amounts epoxy Cut 4, ply sheeting over F-i F-2 using pattern plans Note grain make easier wrap around formers photos shows sheet ing place %2 balsa sheeting being installed behind ply Glue spruce cowl hold-down blocks place flush ply against F-2 Glue %2-in wing saddle strips place Glue FB Lite Ply pieces doublers F-3 Glue % x 3A-in maple blocks wing hold-downs FB F3 using epoxy Epoxy WM Lite Ply pieces fuselage % x 3A-in ma ple block underneath Place wing saddle pin place temporarily lining up trailing edge center centerline former F4B Square wing fuselage mea suring tail post No 10 rib trailing edge Pin firmly drill rear hold-down bolt hole using Y6-in bit Re move wing drill enlarge Y16-in hole wing trailing edge in Tap maple block 4-20 threads Reinstall wing bolt down trail ing edge Square wing again pin firmly Drill front hole fit piece Y16-in dowel Drill matching hole remove wing enlarge both wing holes 14 tap maple blocks /4 -20 Bolt wing place lay sheet polyethylene over wing center section shown photo Again referring photos pin top %2-in balsa strips place wing between F-3 F4-B Pin F3-A place checking fit against F3 Pin F3-B place checking fit straightedge F3-B forward F-2 ensure continuity top sheeting Sand trim necessary Install A-in-sq top balsa stringer two side / x A-in stringers shown photos Cut off rear portion top cabin strip F3-B F-4 Cut cabin cockpit sides lightweight -in sheet balsa using outline side view plan former F3-B CF Cut front rear h-in sheet doublers lightweight stock using cabin side pattern Glue place making right left side Glue lightweight 34-in trian gle stock top edge sides re ferring photos Draw lines polyethylene sheet former F3-B F4-B felt-tip pen Pin sides lines pin former CF back sides Place F4T against F4-B holding clothespin temporarily shown photo Glue two pieces / x 3A-in stock between CF F4-T two A-in pieces substi tuted single A-in piece glue line can used reference point shaping cabin area Glue sides CF F3-B Glue %-in side sheet between CF F4-T wetting wood fit curve neces sary Glue A-in sheet doubler side sheet Glue x 1-in cap top side Glue two-piece A-in sheet top CF aft F4-T per photo Glue %2-in sheet cabin floor place checking fits well sides Glue 34 x 1 /2-in soft block piece sides front F3-B sanding insides fit curve sheeting Rough cut exterior sides using pattern shown plans Refer photo showing desired shape soft block front Rough sand bumps out cabin area sides taking care dig wing sheeting Sheet sides F4-B aft tail post Remove cabin area polyethy lene sheet plan Make cutouts F3-A hold-down blocks lo cated Epoxy maple blocks F-3 epoxy piece /e-in Lite Ply inside %2in side sheeting blocks meet Drill through sheet blocks tap latter 4-40 bolts Enlarge hole side sheet 4-40 bolt well Glue -in top sheet turtleback place glue ply hold-down plate A-in dowel top cabin sheet Drill through dowel ply enlarge ply hole insert blind nut Screw cabin structure onto fuselage assembly Fair cabin areas side sheeting using 180-grit paper little patience careful sanding will make nice smooth transition turtle hump cabin area Place canopy over cabin structure trimming good fit along glue line Mark canopy outline pen carve inside area about A-in thickness sharp knife finish sandpaper hardest part building 36 Model Aviation PROP NUT ADAPTORS V model finished can now take fun break doll up cockpit floor painted flat black sides green zinc chromate color headache rack built using piece 3A6-in alumi num tubing top radius 346-in doweling painted zinc chromate re mainder instrument panel painted almond color shown detail color photos Mask off paint sheeting over front cockpit same blue will used final exterior finish prototype used Red Devil polyurethane Empire Blue Sigs Blue Sky Bright also close color Polings full-scale Lark simulate fiberglass band fullsize plane piece 46-thick %-in wide balsa laid across top curved glued ends painted chromate Williams 3-in-scale sport pilot used dressed up piece balsa block glued bottom shaped raise pilot proper height parachute painted red match red shoelaces used straps shoulder straps black shoelaces Starting Before Takeoff placard shown photo finished cockpit glued wall before gluing canopy canopy tinted hot water black Rit dye careful make too dark Swish canopy around large roasting pan little remove rinse cold water isnt dark enough repeat process until youre satis fied full-scale Lark has just sugges tion tint canopy prototype glued Testors cement green tube variety Any similar model ce ment should work just well Mask off canopy above paint line protect Finishing fuselage Install string ers glue F3-C F2-B F2-C place sheet section i/ x -in spruce strips may glued pine landing gear blocks Install /8-in sheet between blocks fill-in File 346-in brasstubing enclose main landing gear wire wrap soft wire shown plan photo Place gear slots pine blocks holding place screwing three -in brass strips leg using commercial straps Build cover over gear per photos plans Glue three-ply hold block 1A-in sheet balsa fill-in Drill down through fairing block tap block 4-40 bolt Screw fairing place sand ing fit F2-C F3-C formers photos shows foam form shaping cowling using one-off meth od Believe folks aint worth considering cost foam boat glass epoxy hours sanding filling cutting holes etc T&D Fiberglass Specialties fers ready-to-finish cowl sample Tom Keeling sent fit fuselage per fectly would highly recommend purchas ing cowl wheel pants canopy Tom T&D canopy formed 040 material beaut requiring slight trimming perfect fit tried mold canopy 15 times before finally giv ing up easier cover tail surfaces before installing fuselage Sig Koverall nitrate dope used model excellent results After bolting wing slip stabi lizer place ensuring its square trailing edge wing level wing Make certain stabilizer true before gluing place Slip el evator used Klett pinpoint hinges secur ing aliphatic resin Install fin its slot squaring tail post us ing 900 angles side assure square ness stab Make up tail wheel assembly glue place use commercial assemblies securing ply plate epoxied fuselage bottom Install rudder glue hinges prototype given two coats ni trate dope wherever Koverall met structurethat ribs leading edge sheet tips trailing edge fuselage stringers front sheeting turtledeck sheeting Af ter sanding 220-grit paper Koverall installed brushing nitrate through material contact points iron set medium heat beauty taut covering immediately apparent magic Thats uppers building stick-and-rag models Five coats thinned nitrate brushed entire model coat thinned nitrate mixed talcum powder pure kind starch applied sanded smooth 220 Tri-M-ite followed three coats ni trate sanded 360-grit paper Finally sprayed polyurethane mist coat fol lowed fairly wet doubt could have applied red stripes Coverites Graphic Stripes 6-in sizes right mark scale appearance red ex actly matches color full-scale plane stripes joy apply eliminate masking spraying would otherwise required Theyre no thicker coat paint have beau tiful gloss Prime Time lettering Polings name hand painted 0-size long haired sable brush using Sig Skybright Yel low bottom half mixing red create orange top half reg istration numbers letters -in Hel vetica No 411 Presto Stik Vinyl letters found office supply stores Use 030-in music wire wire brac ing tail feathers %-in length %2in brass tubing flattened end drilled hole soldered wire No 2 screws used hold brac ing through holes drilled hardwood mounts ply reinforcements stab fin No 32 straight pins Sig se cured aliphatic resin used sheeted parts simulate Dzuz fasteners PK screws driven metal Continued page 141 New Rocket Uses B C andD Engines. Capability No Else Offers MRC s recent introduction 25 Moonbiaster inter mediate kit brings yet another technological advance MRCs Computer Aided Designs CAD built carry B4-2 C6-3 engines However Moonbiaster also commercially sold rocket kit includes easy-touse adapter also allows louse powerful Dengines Builtto take blast Moon blaster features large die-cut balsa fins blowmolded nose cone superb space capsule detailing Self stick decals 18chute Send free catalog See full line advanced MRC rockets hobby dealer cant help callus directly MRCe Model Rectifier Corporation 2500 Woodbridge Ave Edison NJ 08817 201 985-7800 July 1989 37 Safety/Preston Continued page 20 types animals including birds Nobody can predict time hot spots 1989 season will since known hot spots close us would wise outdoor modelers know something about disease what to avoid what symptoms aware First avoidance cant avoid encounter ing ticks small over place pet owners know However ob serving few precautions can keep ing bitten and/or infected Actions will keep ticks off skin effective preventa tive measures Ticks dwell low shrubbery grass blades get onto shoes kles lower legs crawl upward Wear long pants cinched ankle tucked socks boots less access skin bet ter Check clothing frequently especially youve through field brush retriev ing downed airplane Wearing light-colored clothing makes easier spot little devils Repellents containing Deet can used effec tively clothing shoes pants socks di rect application high concentrations skin advised new product Permanone available may effective Applied clothing both repels kills ticks After day field check feet kles legs attached ticks tick nymphs about size pinhead feeding Any find should removed imme diately fine curved-tip tweezer Grasp tick close possible its mouth part sticking skin pull outward firmly jerking Alternate methods tick re moval alcohol heat vaseline etc popular past have shown less effective good removal fast removal less chance infection Immediately after removing tick disinfect bite rubbing alcohol betadine Unfortunately victims never see tick infects symptoms Lyme dis ease include various types rash may de velop weeks after infection fatigue stiff neck flu-like symptoms headache chills fever muscle aches arthritislike symptoms difficult disease victims recognize doctor diagnose pattern symp toms varies widely case case symptoms mimic other illnesses See doctor symptoms lead suspect have disease Early treatment effec tive Untreated disease progressive can become serious its advanced stages Jesse also sent copy article Lyme disease appeared Consumer Reports June 1988 pages 382-385 Another article disease can found March 1 1989 sue American Nurseryman feature article article states New York Medical College investigating connec tion between Lyme disease multiple sclerosis MS both have similar symptoms alert ticks have safe month Lark/Shepherd Continued page 37 Brads plane scimitar show prop carved piece 2 x 12-in white pine shelving material covered multi ple coats nitrate high-gloss finish painted same white used model Designing building beguiling air plane very satisfying enjoyable Though problems cropped up solving could frustrating times playing Daedelus definitely worth too can have quarter-scale model beauti ful home-builtand fly off work bench instead drawing board Whats wont need cargo van carry flying fieldor contest site En joy building flying unique little Lark Radio Technique/Myers Continued page 41 5 A-in disk Microsoft 9 Sector format usable IBM PCs compatibles Other formats may available need Ask WIMP will ASCII accompanied handbook will have some hints conver sions other computers files disk RC Slope Soaring/Triebes Continued page 47 instant perfection successful flight landing hinting promise things come knew what next couple hand tosses Continued page 144 July 1989 141