acse spo estimatt perfori rining thai nvciled on0-de kit concept era joined at&ircr nd buyeras work rce tri rnng p 31 nice shape 5043-26 collection 01 inc r Pa oulder ho ors wife -26 Just offer mentioned ss rugg 1 RC pen allows rat spa malistic canca three neces model saus F ering eagles pea atten L-R ASK 7 IS 1515 pI1 lanes demi aistIc cr0 demand SingSt 1V57 401-26B Ti used Cobalt dished three-views v start documenting s did owners o d pencil add ur three-view judges understand ncies between di present b variations con Vintage Sailplan eem5 lad Bob # w dollars repairing tl fabric noses us almost e converted ig nose area think o r aspect ratIo design coupled dent ailerons makes tighter radius enhances model ws ability stay weak thermals build 1-26 wide variety markings available mod &Imost gliderport US has Ive found owners fiatthat someone might build miniature ir personal sailplane Finally few Sailplanes offer portability like lave make models fit Plymouth TC-3 custom convertwait Load camera doc tuat full-size 1-26 ruction Start wings tiue described will create correctly set wings later allows fu erly fitted wings original USAF 1-26 posed Al also delivered finished same drami 26 Model Aviation o delivery location ONE QUARTER SCALE ________ 126 B STEVE MOSKAL N 3/32 PLY1/16 BALSA 1/8 BALSA PLANKING RIBS 1/32 PLY TRIPLER3/32 BALSA 1/8 LITE PLY KEEL 1/16 BALSA SHEET 1/8 x 3/8 SPRUCE \1/8 LITE PLY N BLOCK BALSA 1/8 SQ SPRUCE LAM 1/3 BALSA 1/16 BALSA SAILPLANE1/16 BALSA 3/32 BALSA 1/8 50 SPRUCE N 7 N 1/16 BALSA SHEEt N N 1/8 x 1/4 SPRUCE N1/16 CAP STRIP N NNW xx N N N 1/16 WEB 00 Co_________ 0 Co 0 00 ____ 000 ____000r%3 000 _-F2 F-- so07G 00w4 0 -0ro - F yif F2GST4 F3 0i I/B LITE PLY Co _______________________CI 0 0 ro ___________________ ___0 0jCo NI/BLITEPLYKEEL w--BALSA BLOCKSHAPES KREMO VED FOR CLARITY 4-40 SOCKET4-4OBLINONUT HEAD BOLT C0 -BATTERY3/I650BALS /BOD BRASSI/8 BALSA PLANKING I/B PLY INSERT SPRUCE SKI I/BL AM r-LER- BOTH SIDES 82r IA B2CI 0- Dt DOUBLER FROM 3/32PLY C2 B3 B B B3 C 1 0 CI- 0 AILERON SERVO 3/16 50 BALSA 3/32 BALSA GUSSETS W II 3/32 WELL LINER LA JoZ WHEEL has said before countless articles Make up kit prior construction Get labeled model will fall together Ill repeat cost boring parts possible precut Notice 36-in top rear spar allows Left wing halves joined scrap tube note masking tape leading edge inside main tube rear incidence tube cut razor saw Right Epoxy 1As ply doublers Ri R2 Epoxy 1A-in-lD brass tube construction pics author 28 Model Aviation Co Ia C Full-Size Plans Available. Page 170 3/32 PLY1/8 BALSA BOTh SIDES E oII/lB BALSA_____ En T2T3 I/B BALSA ~2 NOTE PERK0___ SECTION C-CFILL WITH BALSA 7 CANOPY BOW I/8LITE PLYI/B BALSA PLY TRAYS - I/B I/4SPRUCE LONGERONS L/B3/B- I/B LITE PLY FILL K3/16BALS1/16 PLY WEB 82 TO 0I/BBALSA BOTH SIDES B I/4SPRUCE 1/BSPRUCEI/B BALSA 3/32 BALSA BOTH SIDES F I/BBALSAI/8oI/4SPRUCE / KANTENNA/I/B 00 WEL KEELANTENNA -I/BBALSA- 1/BSO SPRUCE I/BKEEL CANOPY BOW FORM TURTLEDECK STRINGERS REMOVED FOR CLARITY TT4I/4BAISA 8F2 C I/8LITE PLY I~f!I ___BALSA FILL rI/4BALSA WITH BALSAI/B DOWELSPRUCE LAMDOUBLWJ PERFECT 1/2 / I/B BALSAI/BSO/ WHEEL SAILPLANE NOTE TARER3732MUSIC WIREQUARTER SCALE DESIGNED AND DRAWN BY UCEL8SECTION 0-0DUBROAILERON[Yuii2ALlSi7 SHEET ONE OF TWO OI 4 Y 1177P sheet 75% chord model Finally select medium balsa ribs best contest-grade balsa can find sheeting other parts cant stress enough need build lightits secret success low Left false leading edge %2 balsa glued rib noses bottom leading edge sheeting ready glued place Right top sheeting ailerons leading edge shimmed back 1Ae balsa scraps allow capping aileron leading edge after its cut free February 1988 29 SPAR DETAIL 31/20WICMAKE TWO I/IGPLY _____3/BPINE FILL ENDS3/B BALSA FILL ENDSflA 31/20CUT LINE W2 MAKE TWO I/ILY I1L7A SECTION A-AH_ I/I6PLYBELLcRANK__ CUTOFF HORN III -BRO BALL LINK NOTE TRIMMED AND I BUILT UP AILERON SI-fARE ROM I/B BALSA GUIDE 11/2 TE PRING1/64______ NYRODRETURNPLY SECTION B-B __ TION C-C V7 I/I6BALSATE SHEETV SHAPE TIPBLOCK I/aID TUBEI/8 1/ SPR I/IGPLY- BLERSI/I6CAP STRIP I/16WE I/4 PLYTO R23 BLOCKKI/B W2-BAL SI/BI/ nut RIP2R3R4RSPRTRBR9RIDP11PIP13 }J1iI4P15 iijR1RP17 W I/lW WEB I/J3/B TO R26 SPRUCE I/I BALSA LE SHEET aspect ratio modelthe full-depth 6-in ply websWi and12-in section Butt two root ends Make two 59%-in spruce spar caps andW2 Mark position caps theand mark position refer plans Left Pin down left wing panel sheeting draw lines rib locations Note scrap pieces piy used guides make both halves Ri lean 350 provide scale dihedral Right spars should completed before cutting through brass tubing 30 Model Aviation Full-Size Plans Available. See Page 170 BOTTOM 202 CLOTHE BALSA TE SHEETTOP7/ -I I// __ /// / / --~18~~------ -I _--I / I/I6PLYFACING RIB MAKE TWOTOP 202 CLOTH ENOS]/ -0LET44RJGHT WEB CVERT GRAIN BALSA BLOCK TI SHIM I/BFOR WASHOUT 198 SHEET BAY I/IGPLYBOTTO _____________________________ OUNTTOP CUTOF ARM 0 R19R20R2IR22R23R24R25R26R27R28R2930 IStIEET TWO OF TW9 SA LE PIECE3/32BALSA FALSE LE 3A-in-OD brass tube cut 6% long ling around tube should extend 4 mark line position / x 3A-in spar capped scrap 1A6-in balsa ends root Dont force filler rear edge leading edge sheet Use cyanoacrylate CyA glue spar should slip fit Fill another 4 out Check leading edge sheet cut caps 12-in webs first checking with 3A-in balsa Now coat assembly oversize width allow attachment straightedges vertical alignment well filler spar caps epoxy 12 false leading edge Now draw lines correct taper tip satisfied root set rear rib locations leading edge trailing dihedral angle roughen brass 8-in-ply web butt-glue 4-in verti- edge Cut glue bottom root sheettube wipe acetone thinner tack cal balsa web After cure carefully ing cap strips aileron sheeting marks slow-setting CyA razor-saw through tube butt joint necessary dry finish drawing rib Cut piece %-in pine filler material Pin down leading edge trailing lines over pieces Glue bottom coat slow-setting epoxy prior fil- edge sheeting using straightedge spar cap leading edge sheet recheckLeft T-pins used maintain alignment spars epoxy cures Both W2 pieces epoxied spar Right Spar filler glued around 6/a-ln brass tube Use hardwood first 4 out root %in balsa remainder way out SCHWEIZER 1-268 SAILPLANE AC fltd BreD era c IOESIGNEO AND DRAWN BY ISTEVE IAnCWAJ bruary 1988 31 Left main brass tube tacked Wi ply webs Right An iiiustration gap ieft razor saw between in spar caps finished spar sections can later separated cleanly Note marked outline inside Wi webs used iocate tube spar caps satisfied fit glue ribs Make whatever corrections necessary fit upper cap glue ribs ensure proper alignment leading edge rib halves Ribs Ri through R6 pin straight piece scrap wood noses ribs R7 through next step glue 1-in balsa strips perimeter stab/elevator sheet RiO line up other Glue Ri 3 0 scale dihedral others 900 matching loft angle rib noses R6 Glue 36-in top rear x A-in spruce spar Make shim scrap balsa elevate trailing edge / R3 1 tapering zero thickness R24 Left Glue pre-tapered h-in balsa ribs biock balsa sievator horn mount stabilizer center ribs will filled scrap baisa later Right rudder fin laid up same way stab elevator Spruce spars glued over hinges aligned long piece music wire ilnes marked ribs before Alcohol softens balsa bend around curve 32 Model Aviation stab elevator construction begins Draw lines sheeting act guides pinning down sections balsa Large following full-scales rib locations Klett hinges set next pre-tapered spruce spars glued place ing straightedge right angle Po sition rear half Ri using 3 jig made scrap ply glue spar bottom sheet Continue rear halves R2 through R6 Slip ribs R7 through R3 1 between Left Balsa cores Ae sheeting prepared Note fin spar 1/a x %-in spruce tapered match rudderand its length will allow glued fuselage former F Right Du-Bro ball link plans show aileron ball link bolted piece brass sheet has silver soldered %2 music wire Trim fin spar bottom allow travel arm slip underneath Cut A-in balsa vertical webs fit snugly between ribs R19 R30 trim flush rib top angles Trim hinging system Before its glued trim bottom web between Ribs R22 R23 allow clevis pass through connect trimmed Du-Bro nylon horn Glue two false aileron ribs shaped R22 capture horn Glue aileron ribs Rl9b R3Ob side respective main ribs standing off A2 Add vertical-grain balsa webs spar called plan Glue spoiler in spruce subspar double outside Ribs R13 R18 scrap A-in balsa shaped top curve R12 Roughen aileron pushrod tubes attach points Ri R2 R20 R2 1 epoxy place same fash ion epoxy spoiler tubes Ri R2 R13 R14 R15 Also add A-in ply block inside Ri screw eye mount Carefully trim false leading edge %2-in balsa slightly oversize sanding slight angle bottom edge match rib curve After trimming necessary glue false leading edge bottom point rib noses leaving excess width extending above nose tops Pro tect tops ribs masking tape sand false leading edge down ly working toward angle curve top sheeting Bring bottom leading edge sheet up contact ribs false leading edge glue fast-setting CyA Install half-ribs Rib through R4b Glue top trailing edge sheeting Ri R19 pin down securely Also glue vari ous pieces aileron sheeting tops aileron spar aileron leading edge trailing edge diagonals /16-in balsa simulate diagonal ribs full-scale aileron Slip pre-drilled /6-in-ply aileron bellcrank mount place cable Du-Bro metal clevis connected bellcrank check action eliminate binding CyA mount two ribs Make up short pushrod threaded both ends Du-Bro ball joint connector bellcrank end metal clevis aile ron horn end rods will installed later prior covering Draw lines match rib tops underside leading edge sheet Use thixotropic heavy viscosity epoxy like Hobbypoxy Formula III apply rib tops false leading edgenot top spar cap Apply thin coat epoxy rib line avoiding rear cap contact point Carefully position top leading edge sheeting top cap approximately forward rear edge cap aligned attach rear edge sheet cap fast-setting CyA Gently smooth bend sheeting ward hand paint roller suring proper adhesion epoxy pin tape masking sheeting false leading edge fussy about fit sheeting lays down smoothly old phone books can ensure proper bend pressure Allow over night cure Trim excess balsa leading edge sheeting meets false leading edge sand flush Rough-cut first leading edge piece A-in balsa slightly oversize Glue false leading edge securing place pins dry add final piece leading edge material cut y16-in balsa sheet Add cap strips rib tops R20 through R29 Unpin wing panels board Plane rough-shape leading edges carefully tapering toward tip Sheet area between R30 R3 1 add balsa tip block Note cut block material proper angle prior gluing need sand top tip block get proper curve February 1988 33 Above The robust fuselage provides enormous amount room radio installation Notice routing spoiler line spoiler servo center location aileron/rudder servo allows coordination V-harness electronic manip ulation Large opening Lite Ply floor allows easy access re ceiver antenna tube Right long wire pin used secure elevator stab allows elevator removed Remove aileron cables join panels small piece 42-OD brass tube root ribs flush other Lay section down flat block up other section about mid-panel Roughen 4-in-ID brass tube cut 414 long seal ends scrap balsa clean solvent Separate panels slip tube through ribs six pre-drilled 46-in ply doublers root ribs aligned other pin leading trailing edges match Take time correct holes ribs doublers nec essary get unforced fit Coat dou blers thin layer slow-cure epoxy clamp ribs building small fillet epoxy inside joints After cure cut through tube carefully razor saw before Reposition wings washout shims place pin se curely complete top sheeting cap strips Cut spoiler blades 1-in trian gular trailing edge stock cut piece 4 ply exact dimensions front bottom piece Thinly coat ply epoxy tape bottom blade prevent shifting lay bay Weight assembly light pressure After curing protect sheeting surrounding box masking tape sand blade level sheeting duplicate airfoil curve MonoKote hinging system glue spruce bass strip fill 4-in gap between top leading edge sheet spoiler leading edge Install blade horn small Du-Bro return spring hook up spoiler string checking action binding eliminated Remove panel board cut aileron free sawing through rib carefully avoiding aileron spar Sand aileron leading edge angle 650 sand flush ribs protruding 4-in spar Face aileron A6-in balsa leaving notch born small Du-Bro aileron temporar ily taped place install short pushrod bellcrank Epoxy horn base removed between false ribs Bring aileron neutral position epoxy still uncured clip clevis Pin clamp aileron neutral allow cure Trim facing rib 46 ply match profile sheeted root rib final step glassing roots 2-oz cloth Cover bottom first section cut angle 4 out trailing edge 8 out leading edge top piece should end 8 out trailing edge 12 out lead ing edge used Hobbypoxy Formula II squeegeed out maximum amount resin After cures tape adjacent balsa areas masking tape prevent oversanding lightly sand cloth No second coat needed Fill Model Magic Filler Fill bench rash dings voids Model Magic Filler give wing finish sanding using Tee-Bar similar true-sanding tool Use heavier grit spar ingly complete final sanding 600 grit will give best finish base film covering like MonoKote used Tail surfaces scale outline 34 Model Aviation stab 12% total wing area ever did care flat plate section full-scale aircraft Therefore show 9%-thick diamond airfoil used prototype Cut shape sections /6-in very light balsa sheeting stab elevator outlines pin down Pencil scale rib positions Cut out lightening holes now desired Plane sand 4 x %-in spruce strips correct taper Glue two trailing edge stab leading edge elevator Correct mismatch sanding block Glue 4-in sq balsa strip stock leading trailing edge perimeters halves Use 4x h-in balsa stabilizer tips Glue pre-shaped triangular 4-instock ribs Remove halves relieve 46-in sheet spruce spars large Klett hinges loose pins Finish opposite side previous steps sand fin ished stabilizer shaping rounded lead ing edge sharper trailing edge elevator Install large Klett hinges slow-setting CyA using piece 032 music wire least 25 long keep hinges aligned other Add balsa block filler between lower upper center ribs stabilizer decide stab will removable see fuselage construction text Add A-in balsa pieces top bot tom elevator hinge line Tap elevator horn screws harden holes CyA Join two sections 032 wire round spruce leading edge elevator 1 travel direction Build fin rudder same man ner stabilizer elevator Note fins spruce spars extend down approxi mately 2 below F2 mate former F Add 3/ music wire arm rudder allow actuated inside fuse lage arm bent cut accept Du-Bro aileron ball link rudder must swing 300 deflection either direction former F has notched allow full left throw full throw elevator wire can withdrawn screwdriver blade inserted tail cone open metal clevis stabilizer unbolted Left An overhead shot rudder deflected left stab has removed reveal Du-Bro metal clevis used connect el evator horn within hollowed-out tail cone Right left spoiler fully raised show spring retainer small control horn Its good idea place name ad dress model case should ever fly away Also AMA Safety Code re quires model identified either name address AMA number S Fuselage Begin box sides trimming joining 1/16 balsa sheet /16 ply over outline wax-paper-covered plan Use ply B2 D proceed aft /16 balsa lightest weight making sure grain running vertically Glue /8 x A-in spruce strips perime ter section Remove wax paper complete right side Fill space between spruce longe rons B2 D %-in Lite Ply shape F2 Using Formula II epoxy Y32 ply pieces PL PR spruce strips parts touch Lite Ply spruce except lower longeron area aft former D cured carefully align tape two sections together drill %-in hole main tube 3146-in holes rear incidence spoiler tubes Separate two sections drill re spective Y6-in aileron cable holes Route out openings screw eyes Drill through Cl D elevator cable tube separate drill rudder cable tube hole D spoiler tube holes Cl Mark inside surface two fuse lage box sides x A-in spruce dou blers leaving gaps B2 Cl stopping D Cut strips glue inside noting bottom strips raised 42 allow later addition box floor Glue B2 Cl D using right trian gles check squareness formers side sides building board satisfied clamp sides gether Epoxy doubler tripler cut x %-in spruce flush top Cl glue x A-in spruce joints aft B2 either side Cl forward D tripling area top Cl will allow surface secure %-in brass tube epoxy brass tubes until satisfied wing aligmuent Wings should easily slip both main rod A2in drill rod tempered Rockwell C-Scale 42-45 incidence setting rod use incidence tube hole neces sary Brush Formula II add medium-weight glass cloth over both tubes contacting respective formers box sides Cut rectangle %2-in ply servo tray aft B2 cutouts servos switch harness rest box floor will formed 3A2-in balsa grain running side side used small piece 3A2-in ply cut out aileron servo aft Cl continued %2-in balsa E Flip box over mark centerline bottom B2 D Glue square strips /6 balsa either side line corresponding A-in thickness keel Trial fit Lite Ply keel servos place eye toward routing wires airborne system Make cutouts now left 3-in gap floor aft ply tray no apparent loss strength battery goes behind former 12 Ab pack recommended Trim keel pack leaving some space foam also After B 1 cut trace duplicate balsa ply use forward canopy tray Also trace one-piece copy former %2-in aircraft ply Make up A-in balsa ply pieces epoxied together right gles secret gentle heating epoxy heat gun flows will spread thinly over sheet Cut out turtledeck formers Tl through T3 A-in balsa T4 cut Lite Ply Notching should done after theyre glued place should already have decided point subject stringernosed sheeted area tar fledeck sheeted Trim formers areas allow sheet planking material Steady box bench slip wings rods checking fit PL PR Use straightedges keep sides square use pins board keep PL PR flush root ribs Bend sides together aft E Cut former E A-in balsa glue after drilling cable tubes Glue T4 F aligning center F points equidistant wing trail ing edges Mount fin platform F2 true fin right triangle Set fin aside epoxy F2 T4 F Stab mount S should epoxied now Line stab up hinge line right angle fuselage centerline tack glue S Drill two holes A-in nylon mounting bolts through balsa block stab S Counter sink balsa allow bolt heads sit flush top stab Lubricating bolts Vaseline put through stab snug up nuts satisfied stabs alignment run bead slow-cure CyA around nut February 1988 35 U author assembles Schweizer beginning two blistering 100 contest days first certainly last SOAR Scale Uprising Photo Dave Haertel Jack Hiner launches model author can concentratIon grabbing lots altitude Using helper launch lathe best way handle Sailpianes size Mike Macintyre plc Designed Ken Willard eamater 4 ON-Board Battery Tester Saves Time. Saves Models Install RC Models Check receiver battery status press button Small Light /2 oz Precise Rugged RX-1ORDER TODAY $1495at dealer Protune Corp 914 462-6452 USAP 0 Box 1808 Poughkeepsie NY 12601 U rims touch underside mount Glue scrap standing tail ends PL PR away gentle bend fit selage sides flush root ribs Glue A-in spruce dowel PL PR ap proximately F Install tubes elevator aile ron servo cables securing form ers epoxy small patch medium-weight glass cloth critical keeping tubes bending pop ping away formers under fight loads What can get away small Gliders woefully inadequate quarterscale models Notch turtledeck formers receive % x A-in spruce longerons Round top edges longerons prior gluing Make up keel epoxy %-in ply inserts receive brass wood screws used mounting skid Glue keel key piece A6-in balsa strips touches B 1 B2 B3 Glue former halves B3 C2 Laminate keel 2 ply either side skid mounting area save weight used 3-in ultralight wheel JoZ Products well liner %2-in balsa wetted slightly allow bend Glue glue %-in triangular balsa gussets brace keel After rounding outer edges glue first two horizontal ply nose formers will simu late tubing B2 after rounding outer edges should able use two pieces -in balsa sheet per side plank between B3 C2 Glue doubler strips balsa keel flush b6ttom B3 C2 planking support same planking will touch PL PR After planldng add rest Lite Ply shapes 3 Glue Bi finish formers Bi Cut canopy trays carefully A-in balsa ply begin work front can opy fitting up balsa ply former prepared match Bi Shape rear bow tray laminating two pieces 46 bass about /16 wide over former Trial fit bow tray after notching two rear corners glue sat isfied rear tray reverse aft shape matching Ti ward shape laminated bass matching front bow Finish trays two coats Formula H epoxy paint flat gray epoxy enamel provides best surface gluing canopy Wil holds RC-56 Plan instrument panel pilota DGA quarter-scale bust what chose because its light weight 1-26 steel tube turnover structure under rear canopy used Sullivans outer sleeves simulate thisdrinking straws would work just well Cover glue joints canopies touch trays bows strips painted plastic simu late aluminum framework rear can opy clear acetate sheet Continued page 129 36 Model Aviation Flies off both land water Crisply die-cut balsa ito ply parts complete hardware eas sembly sensible engineeng Qlear plans p oto illustrated assembly manual 50K229 Complete Catalog $200 ordered direct add Han 16 W 19th St PO Box 511 E7 Higginsville MO N64037 call 816 584-7121 Safety/Preston Continued page 22 ter received Stasi Poulos Dallas TX recently helping newcomer RC fly ing soloed become quite confident ability lost almost fear about flying wind day watched him take off 15 mph steady headwind ascent beautiful could until turned downwind made decision throttle back since plane seemed pick up much speed downwind leg plane banked slightly tried correct bank ailerons horror hollered ailerons werent work ing Yet still throttle elevator control Convinced victim chanical radio failure handed threw transmitter regained control landed tried explain him what happened plane turned downwind its air speed did change its speed over ground did student felt plane passing him too fast solution throt tIe back failed realize did re duce speed plane passed him no real indication planes airspeed reduced airspeed until plane stalled Ailerons change lift aircrafts wings no lift can swing want youll never know difference student said No way plane wasnt moving slow What really saw however stalled plane moving air mass Stasis description incident makes wonder radios have sent off correction failures really didnt occur opinion appreciation visual effect wind models flight characteristics has direct bearing safely fly Have safe month watch out downwind turns Schweizer/Moskal Continued page 36 forward canopy molded piece plastic clamped frame heated oven drawn over wooden plug method has described times other articlesone best being Steve Gray March 1987 issue Model Builder would rather make canopy available ready-made Shabo Scale 2416 North 66th Wauwatosa WI 52213 Plan canopy hold-downsrubberbands mini ature hooks simplest lightest Route pair inner Nyrods PL PR spoiler servo glue Install airborne gear check ac tions correcting binding rubbjng Complete turtledeck structure add crossgrain floor Xe-in balsa E U Glue both halves F3 four A-in balsa lower main stringer standoffs Laminate lower main stringer two pieces A-in-sq spruce Glue stand off formers /6-in floor fuse lage glue stringer running keel G Glue 1/16 angular balsa gussets brace standoffs floor Add piece Y32-sq spruce doubling top longeron Tl tapering aft F Complete two lower stringers running C2 F3 aft F3 keel Form skid two pieces 1A x /2-in spruce laminating form made common nails board Drill skid screw attach points re move cover glass cloth paint match scheme Some 1-26 aircraft fabric fairing cover gap between skid fuselage quite often no fair ing used tail nose cone built up balsa Shape tail cone A-in core Lite Ply hold shape ply core doubled A-in balsa carved correct taper Tack-glue fuselage check maximum travel elevator horn will later glued after painting covering carefully drilled center nose cone after shaping soft balsa %2-in ply disc matches former 4-40 hex head bolt eased piece -in brass tube used bushing created N shape 3A2-in ply would slip behind drilled 4-40 blind mounting nut holds nose cone place bolt tight ened access hole 4-40 bolt serves scale air vent common 1-26 nose cones battery pack way also has advantage being acces sible acts balancing weight STICKY BUSINESS NOW AVAILABLE ON VHS VIDEO ADHESIVEUU Frank Tiano Producer Bob Violett nician ira KEEP YOU OWED TO YOUR SEAT Contains everything want know about Zap Loctite adhesive product informative Humorous 2 hours two intermissions ideal club meetings Produced Frank Tiano Techniques Frank Tiano Bob Viotett NOW AVAILABLE FOR SHOWING $3495 Plus $2 Shipping & Handling Name CityState __________ Zip Send $3695 $3495 plus $2 shipping & handling check money order Frank Tiano Enterprises 2460 SW 85 Terrace Davie FL 33324 Allow 4-6 weeks delivery Sorry cannot deliver post office boxes MA February 1988 129 WORLD CLASS tA Retr *6 Tony Frackowiaks Challenge IV Kit Atlanta KitDash Kit Hattori Headers Pipes AMA&FAIRC Aerobatic Specialties PO Box 388914-248-8603 Lincoindale NY 10540 Send $100 catalog FIBERGLASS PARTS Over 237 cowls kit scratch built models Also over 34 round cowls ranging 4 14-718 diameter 55 duff size & shape wheel pants custom Make Parts Vacuum Form Canopies Pining send $1 unqist kt TAD FIBERILASS SPECIALTIES 30925 nlock Dept 4 Garden city Ml 48135 PHONE 313421-6358 BRAZED & HEAI-TREAIED WIRE GEARS & CABANES PHONE 313 261-9064 experience Great Performance Quartet DALOTEL 850 SPAN 69 ins WING AREA 830 sq ins CHIPMUNK 850 SPAN 70 ins WING AREA 850 sq ins SPAN 76 SPAN 72 ins EXTRA 230 WING AREA 900 sq ins ZLIN 526 WING AREA 900 sq ins 4 ALL BALSA ARFS AT ONE GREAT PRICE HOLIDAY SPECIAL $185 ea available direct select hobby shops c ZIMPRO MARKETING nose cone assembly glassed 2-oz cloth covered coat Formula II epoxy filled Model Magic Filler Now time plan unique details particular subject prior covering youve ever covered rubber-powered model silkspan-and-dope ap proach fuselage same except youll no doubt want use heat-shrink covering did easiest way cover stringered nose cut triangular section oversize starting top keel work downwards section sectionone large piece wont work rest fuselage can done three segments stringered turtledeck first left right sides down centerline Before covering glue inspection fair ing balsa rudder horn provide ac cess linkage needed scale inspection cover balsa circle covered MonoKote tack-glued fair ing after final covering Mount gear including main tail wheel Perfect -in balance model indi cated safe point Install radio fly ing surfaces check action controls rudder should have maxi mum 300 deflection either way ele vator should need /2-in maximum throw up down ailerons should have minimum differential 31that three up down spoilers need maximum throw 450 extremely effective fully open Epoxy fin F F2 after fuselage covered connect linkage glue inspec tion hatch Balancing mean aerodynamic chord MAC calculation see Brad Powers arti cle Model Aviation May 1980 has al ways resulted proper balance Sailplanes Ive calculated 1-26 MAC 12y6 translates 30% MAC measured root rib safe balance point model experience previ ous mid-winged Glider bridle launch very safe rings falls off mid-launch allows maxi mum rotation launch Balance plane prior covering adding weight far READY TO FLY Call 1-800-45-TO FLY *LOW PRICES *EASY TO ASSEMBLE *NO BUILDING *NO PAINTING Piper Cherokee-40$13099 Piper Cherokee-259599 Fokker E111-4010799 Fancy Stick-256599 Cessna 172-208999 engine included Eh SUNSHINE HOBBY 17721 South Western Avenue Gardens California 90247 forward possible minimize all-up weight care selection materi als use glues should result un covered airframe balancing 30% mean aerodynamic chord case prototype Covering marking used Super MonoKote because desire keep things light MonoKote trim sheets large letters Duplicating national signia made easy using Sigs stickon decalsluckily smaller size sheet perfect scale smaller mili tary nomenclature letters no push lift etc vinyl rub-ons After some experimentation found work best rubbed onto small section Mono Kote placed position cov ered wax paper sealed iron low temperature slightly below EconoKote range Youll note red flash running nose tail stock red K&B Superpoxy paint sprayed MonoKote after wiping clean ac etone masking pattern Install steel shoulder hook hardware store root about lage sides Remove hooks harden tapped hole CyA hooks will removable display judging Install main wheel cutting small hole Mono Kote side opposite axle hole Slip brass tube axle securing dab epoxy Now patch MonoKote Make up bridle least l00-lb-test braided nylon choose partner ex perience launching large Sailplanes Have him hold model left hand cupped front left leading edge right hand about T3 fuse first flights launch straight forward after gaining flying speed rotate gently up Radio Technique/Myers Continued page 39 Electronics Inc PO Box 996 Hauppauge NY 11788 telephone 516 265-1325 came neatest things Ive seen years wit Multicore Tip Tinner/Cleaner TTC 1 See photoContinued page 132 -Also Am0NCL Li6B/cHAI 84 fl SPAN VULT BT-13 VALIANT 84 IN SPAN ROLLED PlAN SE-- $20 ELCH FThERGIASS CC7JIS--------- *20 EkCH ADD 12oSHPflfGNYS ADD 8TAZ 130 Model Aviation PO BOX 3076 OAK RIDGE TN 37830 PHONE 61 5482-61 88 AERaTCLL3~/l\ FLYING iA SCAlE SPORT SCAlE AERONCA L3/EFNDEE105 IN 2 CYClE 90-13 II 4 CYClE 12-18 AERO PlANS N PARTS PO BOX 939 OIEAR NY 14760 1 372
Edition: Model Aviation - 1988/02
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 129, 130
Edition: Model Aviation - 1988/02
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 129, 130
acse spo estimatt perfori rining thai nvciled on0-de kit concept era joined at&ircr nd buyeras work rce tri rnng p 31 nice shape 5043-26 collection 01 inc r Pa oulder ho ors wife -26 Just offer mentioned ss rugg 1 RC pen allows rat spa malistic canca three neces model saus F ering eagles pea atten L-R ASK 7 IS 1515 pI1 lanes demi aistIc cr0 demand SingSt 1V57 401-26B Ti used Cobalt dished three-views v start documenting s did owners o d pencil add ur three-view judges understand ncies between di present b variations con Vintage Sailplan eem5 lad Bob # w dollars repairing tl fabric noses us almost e converted ig nose area think o r aspect ratIo design coupled dent ailerons makes tighter radius enhances model ws ability stay weak thermals build 1-26 wide variety markings available mod &Imost gliderport US has Ive found owners fiatthat someone might build miniature ir personal sailplane Finally few Sailplanes offer portability like lave make models fit Plymouth TC-3 custom convertwait Load camera doc tuat full-size 1-26 ruction Start wings tiue described will create correctly set wings later allows fu erly fitted wings original USAF 1-26 posed Al also delivered finished same drami 26 Model Aviation o delivery location ONE QUARTER SCALE ________ 126 B STEVE MOSKAL N 3/32 PLY1/16 BALSA 1/8 BALSA PLANKING RIBS 1/32 PLY TRIPLER3/32 BALSA 1/8 LITE PLY KEEL 1/16 BALSA SHEET 1/8 x 3/8 SPRUCE \1/8 LITE PLY N BLOCK BALSA 1/8 SQ SPRUCE LAM 1/3 BALSA 1/16 BALSA SAILPLANE1/16 BALSA 3/32 BALSA 1/8 50 SPRUCE N 7 N 1/16 BALSA SHEEt N N 1/8 x 1/4 SPRUCE N1/16 CAP STRIP N NNW xx N N N 1/16 WEB 00 Co_________ 0 Co 0 00 ____ 000 ____000r%3 000 _-F2 F-- so07G 00w4 0 -0ro - F yif F2GST4 F3 0i I/B LITE PLY Co _______________________CI 0 0 ro ___________________ ___0 0jCo NI/BLITEPLYKEEL w--BALSA BLOCKSHAPES KREMO VED FOR CLARITY 4-40 SOCKET4-4OBLINONUT HEAD BOLT C0 -BATTERY3/I650BALS /BOD BRASSI/8 BALSA PLANKING I/B PLY INSERT SPRUCE SKI I/BL AM r-LER- BOTH SIDES 82r IA B2CI 0- Dt DOUBLER FROM 3/32PLY C2 B3 B B B3 C 1 0 CI- 0 AILERON SERVO 3/16 50 BALSA 3/32 BALSA GUSSETS W II 3/32 WELL LINER LA JoZ WHEEL has said before countless articles Make up kit prior construction Get labeled model will fall together Ill repeat cost boring parts possible precut Notice 36-in top rear spar allows Left wing halves joined scrap tube note masking tape leading edge inside main tube rear incidence tube cut razor saw Right Epoxy 1As ply doublers Ri R2 Epoxy 1A-in-lD brass tube construction pics author 28 Model Aviation Co Ia C Full-Size Plans Available. Page 170 3/32 PLY1/8 BALSA BOTh SIDES E oII/lB BALSA_____ En T2T3 I/B BALSA ~2 NOTE PERK0___ SECTION C-CFILL WITH BALSA 7 CANOPY BOW I/8LITE PLYI/B BALSA PLY TRAYS - I/B I/4SPRUCE LONGERONS L/B3/B- I/B LITE PLY FILL K3/16BALS1/16 PLY WEB 82 TO 0I/BBALSA BOTH SIDES B I/4SPRUCE 1/BSPRUCEI/B BALSA 3/32 BALSA BOTH SIDES F I/BBALSAI/8oI/4SPRUCE / KANTENNA/I/B 00 WEL KEELANTENNA -I/BBALSA- 1/BSO SPRUCE I/BKEEL CANOPY BOW FORM TURTLEDECK STRINGERS REMOVED FOR CLARITY TT4I/4BAISA 8F2 C I/8LITE PLY I~f!I ___BALSA FILL rI/4BALSA WITH BALSAI/B DOWELSPRUCE LAMDOUBLWJ PERFECT 1/2 / I/B BALSAI/BSO/ WHEEL SAILPLANE NOTE TARER3732MUSIC WIREQUARTER SCALE DESIGNED AND DRAWN BY UCEL8SECTION 0-0DUBROAILERON[Yuii2ALlSi7 SHEET ONE OF TWO OI 4 Y 1177P sheet 75% chord model Finally select medium balsa ribs best contest-grade balsa can find sheeting other parts cant stress enough need build lightits secret success low Left false leading edge %2 balsa glued rib noses bottom leading edge sheeting ready glued place Right top sheeting ailerons leading edge shimmed back 1Ae balsa scraps allow capping aileron leading edge after its cut free February 1988 29 SPAR DETAIL 31/20WICMAKE TWO I/IGPLY _____3/BPINE FILL ENDS3/B BALSA FILL ENDSflA 31/20CUT LINE W2 MAKE TWO I/ILY I1L7A SECTION A-AH_ I/I6PLYBELLcRANK__ CUTOFF HORN III -BRO BALL LINK NOTE TRIMMED AND I BUILT UP AILERON SI-fARE ROM I/B BALSA GUIDE 11/2 TE PRING1/64______ NYRODRETURNPLY SECTION B-B __ TION C-C V7 I/I6BALSATE SHEETV SHAPE TIPBLOCK I/aID TUBEI/8 1/ SPR I/IGPLY- BLERSI/I6CAP STRIP I/16WE I/4 PLYTO R23 BLOCKKI/B W2-BAL SI/BI/ nut RIP2R3R4RSPRTRBR9RIDP11PIP13 }J1iI4P15 iijR1RP17 W I/lW WEB I/J3/B TO R26 SPRUCE I/I BALSA LE SHEET aspect ratio modelthe full-depth 6-in ply websWi and12-in section Butt two root ends Make two 59%-in spruce spar caps andW2 Mark position caps theand mark position refer plans Left Pin down left wing panel sheeting draw lines rib locations Note scrap pieces piy used guides make both halves Ri lean 350 provide scale dihedral Right spars should completed before cutting through brass tubing 30 Model Aviation Full-Size Plans Available. See Page 170 BOTTOM 202 CLOTHE BALSA TE SHEETTOP7/ -I I// __ /// / / --~18~~------ -I _--I / I/I6PLYFACING RIB MAKE TWOTOP 202 CLOTH ENOS]/ -0LET44RJGHT WEB CVERT GRAIN BALSA BLOCK TI SHIM I/BFOR WASHOUT 198 SHEET BAY I/IGPLYBOTTO _____________________________ OUNTTOP CUTOF ARM 0 R19R20R2IR22R23R24R25R26R27R28R2930 IStIEET TWO OF TW9 SA LE PIECE3/32BALSA FALSE LE 3A-in-OD brass tube cut 6% long ling around tube should extend 4 mark line position / x 3A-in spar capped scrap 1A6-in balsa ends root Dont force filler rear edge leading edge sheet Use cyanoacrylate CyA glue spar should slip fit Fill another 4 out Check leading edge sheet cut caps 12-in webs first checking with 3A-in balsa Now coat assembly oversize width allow attachment straightedges vertical alignment well filler spar caps epoxy 12 false leading edge Now draw lines correct taper tip satisfied root set rear rib locations leading edge trailing dihedral angle roughen brass 8-in-ply web butt-glue 4-in verti- edge Cut glue bottom root sheettube wipe acetone thinner tack cal balsa web After cure carefully ing cap strips aileron sheeting marks slow-setting CyA razor-saw through tube butt joint necessary dry finish drawing rib Cut piece %-in pine filler material Pin down leading edge trailing lines over pieces Glue bottom coat slow-setting epoxy prior fil- edge sheeting using straightedge spar cap leading edge sheet recheckLeft T-pins used maintain alignment spars epoxy cures Both W2 pieces epoxied spar Right Spar filler glued around 6/a-ln brass tube Use hardwood first 4 out root %in balsa remainder way out SCHWEIZER 1-268 SAILPLANE AC fltd BreD era c IOESIGNEO AND DRAWN BY ISTEVE IAnCWAJ bruary 1988 31 Left main brass tube tacked Wi ply webs Right An iiiustration gap ieft razor saw between in spar caps finished spar sections can later separated cleanly Note marked outline inside Wi webs used iocate tube spar caps satisfied fit glue ribs Make whatever corrections necessary fit upper cap glue ribs ensure proper alignment leading edge rib halves Ribs Ri through R6 pin straight piece scrap wood noses ribs R7 through next step glue 1-in balsa strips perimeter stab/elevator sheet RiO line up other Glue Ri 3 0 scale dihedral others 900 matching loft angle rib noses R6 Glue 36-in top rear x A-in spruce spar Make shim scrap balsa elevate trailing edge / R3 1 tapering zero thickness R24 Left Glue pre-tapered h-in balsa ribs biock balsa sievator horn mount stabilizer center ribs will filled scrap baisa later Right rudder fin laid up same way stab elevator Spruce spars glued over hinges aligned long piece music wire ilnes marked ribs before Alcohol softens balsa bend around curve 32 Model Aviation stab elevator construction begins Draw lines sheeting act guides pinning down sections balsa Large following full-scales rib locations Klett hinges set next pre-tapered spruce spars glued place ing straightedge right angle Po sition rear half Ri using 3 jig made scrap ply glue spar bottom sheet Continue rear halves R2 through R6 Slip ribs R7 through R3 1 between Left Balsa cores Ae sheeting prepared Note fin spar 1/a x %-in spruce tapered match rudderand its length will allow glued fuselage former F Right Du-Bro ball link plans show aileron ball link bolted piece brass sheet has silver soldered %2 music wire Trim fin spar bottom allow travel arm slip underneath Cut A-in balsa vertical webs fit snugly between ribs R19 R30 trim flush rib top angles Trim hinging system Before its glued trim bottom web between Ribs R22 R23 allow clevis pass through connect trimmed Du-Bro nylon horn Glue two false aileron ribs shaped R22 capture horn Glue aileron ribs Rl9b R3Ob side respective main ribs standing off A2 Add vertical-grain balsa webs spar called plan Glue spoiler in spruce subspar double outside Ribs R13 R18 scrap A-in balsa shaped top curve R12 Roughen aileron pushrod tubes attach points Ri R2 R20 R2 1 epoxy place same fash ion epoxy spoiler tubes Ri R2 R13 R14 R15 Also add A-in ply block inside Ri screw eye mount Carefully trim false leading edge %2-in balsa slightly oversize sanding slight angle bottom edge match rib curve After trimming necessary glue false leading edge bottom point rib noses leaving excess width extending above nose tops Pro tect tops ribs masking tape sand false leading edge down ly working toward angle curve top sheeting Bring bottom leading edge sheet up contact ribs false leading edge glue fast-setting CyA Install half-ribs Rib through R4b Glue top trailing edge sheeting Ri R19 pin down securely Also glue vari ous pieces aileron sheeting tops aileron spar aileron leading edge trailing edge diagonals /16-in balsa simulate diagonal ribs full-scale aileron Slip pre-drilled /6-in-ply aileron bellcrank mount place cable Du-Bro metal clevis connected bellcrank check action eliminate binding CyA mount two ribs Make up short pushrod threaded both ends Du-Bro ball joint connector bellcrank end metal clevis aile ron horn end rods will installed later prior covering Draw lines match rib tops underside leading edge sheet Use thixotropic heavy viscosity epoxy like Hobbypoxy Formula III apply rib tops false leading edgenot top spar cap Apply thin coat epoxy rib line avoiding rear cap contact point Carefully position top leading edge sheeting top cap approximately forward rear edge cap aligned attach rear edge sheet cap fast-setting CyA Gently smooth bend sheeting ward hand paint roller suring proper adhesion epoxy pin tape masking sheeting false leading edge fussy about fit sheeting lays down smoothly old phone books can ensure proper bend pressure Allow over night cure Trim excess balsa leading edge sheeting meets false leading edge sand flush Rough-cut first leading edge piece A-in balsa slightly oversize Glue false leading edge securing place pins dry add final piece leading edge material cut y16-in balsa sheet Add cap strips rib tops R20 through R29 Unpin wing panels board Plane rough-shape leading edges carefully tapering toward tip Sheet area between R30 R3 1 add balsa tip block Note cut block material proper angle prior gluing need sand top tip block get proper curve February 1988 33 Above The robust fuselage provides enormous amount room radio installation Notice routing spoiler line spoiler servo center location aileron/rudder servo allows coordination V-harness electronic manip ulation Large opening Lite Ply floor allows easy access re ceiver antenna tube Right long wire pin used secure elevator stab allows elevator removed Remove aileron cables join panels small piece 42-OD brass tube root ribs flush other Lay section down flat block up other section about mid-panel Roughen 4-in-ID brass tube cut 414 long seal ends scrap balsa clean solvent Separate panels slip tube through ribs six pre-drilled 46-in ply doublers root ribs aligned other pin leading trailing edges match Take time correct holes ribs doublers nec essary get unforced fit Coat dou blers thin layer slow-cure epoxy clamp ribs building small fillet epoxy inside joints After cure cut through tube carefully razor saw before Reposition wings washout shims place pin se curely complete top sheeting cap strips Cut spoiler blades 1-in trian gular trailing edge stock cut piece 4 ply exact dimensions front bottom piece Thinly coat ply epoxy tape bottom blade prevent shifting lay bay Weight assembly light pressure After curing protect sheeting surrounding box masking tape sand blade level sheeting duplicate airfoil curve MonoKote hinging system glue spruce bass strip fill 4-in gap between top leading edge sheet spoiler leading edge Install blade horn small Du-Bro return spring hook up spoiler string checking action binding eliminated Remove panel board cut aileron free sawing through rib carefully avoiding aileron spar Sand aileron leading edge angle 650 sand flush ribs protruding 4-in spar Face aileron A6-in balsa leaving notch born small Du-Bro aileron temporar ily taped place install short pushrod bellcrank Epoxy horn base removed between false ribs Bring aileron neutral position epoxy still uncured clip clevis Pin clamp aileron neutral allow cure Trim facing rib 46 ply match profile sheeted root rib final step glassing roots 2-oz cloth Cover bottom first section cut angle 4 out trailing edge 8 out leading edge top piece should end 8 out trailing edge 12 out lead ing edge used Hobbypoxy Formula II squeegeed out maximum amount resin After cures tape adjacent balsa areas masking tape prevent oversanding lightly sand cloth No second coat needed Fill Model Magic Filler Fill bench rash dings voids Model Magic Filler give wing finish sanding using Tee-Bar similar true-sanding tool Use heavier grit spar ingly complete final sanding 600 grit will give best finish base film covering like MonoKote used Tail surfaces scale outline 34 Model Aviation stab 12% total wing area ever did care flat plate section full-scale aircraft Therefore show 9%-thick diamond airfoil used prototype Cut shape sections /6-in very light balsa sheeting stab elevator outlines pin down Pencil scale rib positions Cut out lightening holes now desired Plane sand 4 x %-in spruce strips correct taper Glue two trailing edge stab leading edge elevator Correct mismatch sanding block Glue 4-in sq balsa strip stock leading trailing edge perimeters halves Use 4x h-in balsa stabilizer tips Glue pre-shaped triangular 4-instock ribs Remove halves relieve 46-in sheet spruce spars large Klett hinges loose pins Finish opposite side previous steps sand fin ished stabilizer shaping rounded lead ing edge sharper trailing edge elevator Install large Klett hinges slow-setting CyA using piece 032 music wire least 25 long keep hinges aligned other Add balsa block filler between lower upper center ribs stabilizer decide stab will removable see fuselage construction text Add A-in balsa pieces top bot tom elevator hinge line Tap elevator horn screws harden holes CyA Join two sections 032 wire round spruce leading edge elevator 1 travel direction Build fin rudder same man ner stabilizer elevator Note fins spruce spars extend down approxi mately 2 below F2 mate former F Add 3/ music wire arm rudder allow actuated inside fuse lage arm bent cut accept Du-Bro aileron ball link rudder must swing 300 deflection either direction former F has notched allow full left throw full throw elevator wire can withdrawn screwdriver blade inserted tail cone open metal clevis stabilizer unbolted Left An overhead shot rudder deflected left stab has removed reveal Du-Bro metal clevis used connect el evator horn within hollowed-out tail cone Right left spoiler fully raised show spring retainer small control horn Its good idea place name ad dress model case should ever fly away Also AMA Safety Code re quires model identified either name address AMA number S Fuselage Begin box sides trimming joining 1/16 balsa sheet /16 ply over outline wax-paper-covered plan Use ply B2 D proceed aft /16 balsa lightest weight making sure grain running vertically Glue /8 x A-in spruce strips perime ter section Remove wax paper complete right side Fill space between spruce longe rons B2 D %-in Lite Ply shape F2 Using Formula II epoxy Y32 ply pieces PL PR spruce strips parts touch Lite Ply spruce except lower longeron area aft former D cured carefully align tape two sections together drill %-in hole main tube 3146-in holes rear incidence spoiler tubes Separate two sections drill re spective Y6-in aileron cable holes Route out openings screw eyes Drill through Cl D elevator cable tube separate drill rudder cable tube hole D spoiler tube holes Cl Mark inside surface two fuse lage box sides x A-in spruce dou blers leaving gaps B2 Cl stopping D Cut strips glue inside noting bottom strips raised 42 allow later addition box floor Glue B2 Cl D using right trian gles check squareness formers side sides building board satisfied clamp sides gether Epoxy doubler tripler cut x %-in spruce flush top Cl glue x A-in spruce joints aft B2 either side Cl forward D tripling area top Cl will allow surface secure %-in brass tube epoxy brass tubes until satisfied wing aligmuent Wings should easily slip both main rod A2in drill rod tempered Rockwell C-Scale 42-45 incidence setting rod use incidence tube hole neces sary Brush Formula II add medium-weight glass cloth over both tubes contacting respective formers box sides Cut rectangle %2-in ply servo tray aft B2 cutouts servos switch harness rest box floor will formed 3A2-in balsa grain running side side used small piece 3A2-in ply cut out aileron servo aft Cl continued %2-in balsa E Flip box over mark centerline bottom B2 D Glue square strips /6 balsa either side line corresponding A-in thickness keel Trial fit Lite Ply keel servos place eye toward routing wires airborne system Make cutouts now left 3-in gap floor aft ply tray no apparent loss strength battery goes behind former 12 Ab pack recommended Trim keel pack leaving some space foam also After B 1 cut trace duplicate balsa ply use forward canopy tray Also trace one-piece copy former %2-in aircraft ply Make up A-in balsa ply pieces epoxied together right gles secret gentle heating epoxy heat gun flows will spread thinly over sheet Cut out turtledeck formers Tl through T3 A-in balsa T4 cut Lite Ply Notching should done after theyre glued place should already have decided point subject stringernosed sheeted area tar fledeck sheeted Trim formers areas allow sheet planking material Steady box bench slip wings rods checking fit PL PR Use straightedges keep sides square use pins board keep PL PR flush root ribs Bend sides together aft E Cut former E A-in balsa glue after drilling cable tubes Glue T4 F aligning center F points equidistant wing trail ing edges Mount fin platform F2 true fin right triangle Set fin aside epoxy F2 T4 F Stab mount S should epoxied now Line stab up hinge line right angle fuselage centerline tack glue S Drill two holes A-in nylon mounting bolts through balsa block stab S Counter sink balsa allow bolt heads sit flush top stab Lubricating bolts Vaseline put through stab snug up nuts satisfied stabs alignment run bead slow-cure CyA around nut February 1988 35 U author assembles Schweizer beginning two blistering 100 contest days first certainly last SOAR Scale Uprising Photo Dave Haertel Jack Hiner launches model author can concentratIon grabbing lots altitude Using helper launch lathe best way handle Sailpianes size Mike Macintyre plc Designed Ken Willard eamater 4 ON-Board Battery Tester Saves Time. Saves Models Install RC Models Check receiver battery status press button Small Light /2 oz Precise Rugged RX-1ORDER TODAY $1495at dealer Protune Corp 914 462-6452 USAP 0 Box 1808 Poughkeepsie NY 12601 U rims touch underside mount Glue scrap standing tail ends PL PR away gentle bend fit selage sides flush root ribs Glue A-in spruce dowel PL PR ap proximately F Install tubes elevator aile ron servo cables securing form ers epoxy small patch medium-weight glass cloth critical keeping tubes bending pop ping away formers under fight loads What can get away small Gliders woefully inadequate quarterscale models Notch turtledeck formers receive % x A-in spruce longerons Round top edges longerons prior gluing Make up keel epoxy %-in ply inserts receive brass wood screws used mounting skid Glue keel key piece A6-in balsa strips touches B 1 B2 B3 Glue former halves B3 C2 Laminate keel 2 ply either side skid mounting area save weight used 3-in ultralight wheel JoZ Products well liner %2-in balsa wetted slightly allow bend Glue glue %-in triangular balsa gussets brace keel After rounding outer edges glue first two horizontal ply nose formers will simu late tubing B2 after rounding outer edges should able use two pieces -in balsa sheet per side plank between B3 C2 Glue doubler strips balsa keel flush b6ttom B3 C2 planking support same planking will touch PL PR After planldng add rest Lite Ply shapes 3 Glue Bi finish formers Bi Cut canopy trays carefully A-in balsa ply begin work front can opy fitting up balsa ply former prepared match Bi Shape rear bow tray laminating two pieces 46 bass about /16 wide over former Trial fit bow tray after notching two rear corners glue sat isfied rear tray reverse aft shape matching Ti ward shape laminated bass matching front bow Finish trays two coats Formula H epoxy paint flat gray epoxy enamel provides best surface gluing canopy Wil holds RC-56 Plan instrument panel pilota DGA quarter-scale bust what chose because its light weight 1-26 steel tube turnover structure under rear canopy used Sullivans outer sleeves simulate thisdrinking straws would work just well Cover glue joints canopies touch trays bows strips painted plastic simu late aluminum framework rear can opy clear acetate sheet Continued page 129 36 Model Aviation Flies off both land water Crisply die-cut balsa ito ply parts complete hardware eas sembly sensible engineeng Qlear plans p oto illustrated assembly manual 50K229 Complete Catalog $200 ordered direct add Han 16 W 19th St PO Box 511 E7 Higginsville MO N64037 call 816 584-7121 Safety/Preston Continued page 22 ter received Stasi Poulos Dallas TX recently helping newcomer RC fly ing soloed become quite confident ability lost almost fear about flying wind day watched him take off 15 mph steady headwind ascent beautiful could until turned downwind made decision throttle back since plane seemed pick up much speed downwind leg plane banked slightly tried correct bank ailerons horror hollered ailerons werent work ing Yet still throttle elevator control Convinced victim chanical radio failure handed threw transmitter regained control landed tried explain him what happened plane turned downwind its air speed did change its speed over ground did student felt plane passing him too fast solution throt tIe back failed realize did re duce speed plane passed him no real indication planes airspeed reduced airspeed until plane stalled Ailerons change lift aircrafts wings no lift can swing want youll never know difference student said No way plane wasnt moving slow What really saw however stalled plane moving air mass Stasis description incident makes wonder radios have sent off correction failures really didnt occur opinion appreciation visual effect wind models flight characteristics has direct bearing safely fly Have safe month watch out downwind turns Schweizer/Moskal Continued page 36 forward canopy molded piece plastic clamped frame heated oven drawn over wooden plug method has described times other articlesone best being Steve Gray March 1987 issue Model Builder would rather make canopy available ready-made Shabo Scale 2416 North 66th Wauwatosa WI 52213 Plan canopy hold-downsrubberbands mini ature hooks simplest lightest Route pair inner Nyrods PL PR spoiler servo glue Install airborne gear check ac tions correcting binding rubbjng Complete turtledeck structure add crossgrain floor Xe-in balsa E U Glue both halves F3 four A-in balsa lower main stringer standoffs Laminate lower main stringer two pieces A-in-sq spruce Glue stand off formers /6-in floor fuse lage glue stringer running keel G Glue 1/16 angular balsa gussets brace standoffs floor Add piece Y32-sq spruce doubling top longeron Tl tapering aft F Complete two lower stringers running C2 F3 aft F3 keel Form skid two pieces 1A x /2-in spruce laminating form made common nails board Drill skid screw attach points re move cover glass cloth paint match scheme Some 1-26 aircraft fabric fairing cover gap between skid fuselage quite often no fair ing used tail nose cone built up balsa Shape tail cone A-in core Lite Ply hold shape ply core doubled A-in balsa carved correct taper Tack-glue fuselage check maximum travel elevator horn will later glued after painting covering carefully drilled center nose cone after shaping soft balsa %2-in ply disc matches former 4-40 hex head bolt eased piece -in brass tube used bushing created N shape 3A2-in ply would slip behind drilled 4-40 blind mounting nut holds nose cone place bolt tight ened access hole 4-40 bolt serves scale air vent common 1-26 nose cones battery pack way also has advantage being acces sible acts balancing weight STICKY BUSINESS NOW AVAILABLE ON VHS VIDEO ADHESIVEUU Frank Tiano Producer Bob Violett nician ira KEEP YOU OWED TO YOUR SEAT Contains everything want know about Zap Loctite adhesive product informative Humorous 2 hours two intermissions ideal club meetings Produced Frank Tiano Techniques Frank Tiano Bob Viotett NOW AVAILABLE FOR SHOWING $3495 Plus $2 Shipping & Handling Name CityState __________ Zip Send $3695 $3495 plus $2 shipping & handling check money order Frank Tiano Enterprises 2460 SW 85 Terrace Davie FL 33324 Allow 4-6 weeks delivery Sorry cannot deliver post office boxes MA February 1988 129 WORLD CLASS tA Retr *6 Tony Frackowiaks Challenge IV Kit Atlanta KitDash Kit Hattori Headers Pipes AMA&FAIRC Aerobatic Specialties PO Box 388914-248-8603 Lincoindale NY 10540 Send $100 catalog FIBERGLASS PARTS Over 237 cowls kit scratch built models Also over 34 round cowls ranging 4 14-718 diameter 55 duff size & shape wheel pants custom Make Parts Vacuum Form Canopies Pining send $1 unqist kt TAD FIBERILASS SPECIALTIES 30925 nlock Dept 4 Garden city Ml 48135 PHONE 313421-6358 BRAZED & HEAI-TREAIED WIRE GEARS & CABANES PHONE 313 261-9064 experience Great Performance Quartet DALOTEL 850 SPAN 69 ins WING AREA 830 sq ins CHIPMUNK 850 SPAN 70 ins WING AREA 850 sq ins SPAN 76 SPAN 72 ins EXTRA 230 WING AREA 900 sq ins ZLIN 526 WING AREA 900 sq ins 4 ALL BALSA ARFS AT ONE GREAT PRICE HOLIDAY SPECIAL $185 ea available direct select hobby shops c ZIMPRO MARKETING nose cone assembly glassed 2-oz cloth covered coat Formula II epoxy filled Model Magic Filler Now time plan unique details particular subject prior covering youve ever covered rubber-powered model silkspan-and-dope ap proach fuselage same except youll no doubt want use heat-shrink covering did easiest way cover stringered nose cut triangular section oversize starting top keel work downwards section sectionone large piece wont work rest fuselage can done three segments stringered turtledeck first left right sides down centerline Before covering glue inspection fair ing balsa rudder horn provide ac cess linkage needed scale inspection cover balsa circle covered MonoKote tack-glued fair ing after final covering Mount gear including main tail wheel Perfect -in balance model indi cated safe point Install radio fly ing surfaces check action controls rudder should have maxi mum 300 deflection either way ele vator should need /2-in maximum throw up down ailerons should have minimum differential 31that three up down spoilers need maximum throw 450 extremely effective fully open Epoxy fin F F2 after fuselage covered connect linkage glue inspec tion hatch Balancing mean aerodynamic chord MAC calculation see Brad Powers arti cle Model Aviation May 1980 has al ways resulted proper balance Sailplanes Ive calculated 1-26 MAC 12y6 translates 30% MAC measured root rib safe balance point model experience previ ous mid-winged Glider bridle launch very safe rings falls off mid-launch allows maxi mum rotation launch Balance plane prior covering adding weight far READY TO FLY Call 1-800-45-TO FLY *LOW PRICES *EASY TO ASSEMBLE *NO BUILDING *NO PAINTING Piper Cherokee-40$13099 Piper Cherokee-259599 Fokker E111-4010799 Fancy Stick-256599 Cessna 172-208999 engine included Eh SUNSHINE HOBBY 17721 South Western Avenue Gardens California 90247 forward possible minimize all-up weight care selection materi als use glues should result un covered airframe balancing 30% mean aerodynamic chord case prototype Covering marking used Super MonoKote because desire keep things light MonoKote trim sheets large letters Duplicating national signia made easy using Sigs stickon decalsluckily smaller size sheet perfect scale smaller mili tary nomenclature letters no push lift etc vinyl rub-ons After some experimentation found work best rubbed onto small section Mono Kote placed position cov ered wax paper sealed iron low temperature slightly below EconoKote range Youll note red flash running nose tail stock red K&B Superpoxy paint sprayed MonoKote after wiping clean ac etone masking pattern Install steel shoulder hook hardware store root about lage sides Remove hooks harden tapped hole CyA hooks will removable display judging Install main wheel cutting small hole Mono Kote side opposite axle hole Slip brass tube axle securing dab epoxy Now patch MonoKote Make up bridle least l00-lb-test braided nylon choose partner ex perience launching large Sailplanes Have him hold model left hand cupped front left leading edge right hand about T3 fuse first flights launch straight forward after gaining flying speed rotate gently up Radio Technique/Myers Continued page 39 Electronics Inc PO Box 996 Hauppauge NY 11788 telephone 516 265-1325 came neatest things Ive seen years wit Multicore Tip Tinner/Cleaner TTC 1 See photoContinued page 132 -Also Am0NCL Li6B/cHAI 84 fl SPAN VULT BT-13 VALIANT 84 IN SPAN ROLLED PlAN SE-- $20 ELCH FThERGIASS CC7JIS--------- *20 EkCH ADD 12oSHPflfGNYS ADD 8TAZ 130 Model Aviation PO BOX 3076 OAK RIDGE TN 37830 PHONE 61 5482-61 88 AERaTCLL3~/l\ FLYING iA SCAlE SPORT SCAlE AERONCA L3/EFNDEE105 IN 2 CYClE 90-13 II 4 CYClE 12-18 AERO PlANS N PARTS PO BOX 939 OIEAR NY 14760 1 372
Edition: Model Aviation - 1988/02
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 129, 130
acse spo estimatt perfori rining thai nvciled on0-de kit concept era joined at&ircr nd buyeras work rce tri rnng p 31 nice shape 5043-26 collection 01 inc r Pa oulder ho ors wife -26 Just offer mentioned ss rugg 1 RC pen allows rat spa malistic canca three neces model saus F ering eagles pea atten L-R ASK 7 IS 1515 pI1 lanes demi aistIc cr0 demand SingSt 1V57 401-26B Ti used Cobalt dished three-views v start documenting s did owners o d pencil add ur three-view judges understand ncies between di present b variations con Vintage Sailplan eem5 lad Bob # w dollars repairing tl fabric noses us almost e converted ig nose area think o r aspect ratIo design coupled dent ailerons makes tighter radius enhances model ws ability stay weak thermals build 1-26 wide variety markings available mod &Imost gliderport US has Ive found owners fiatthat someone might build miniature ir personal sailplane Finally few Sailplanes offer portability like lave make models fit Plymouth TC-3 custom convertwait Load camera doc tuat full-size 1-26 ruction Start wings tiue described will create correctly set wings later allows fu erly fitted wings original USAF 1-26 posed Al also delivered finished same drami 26 Model Aviation o delivery location ONE QUARTER SCALE ________ 126 B STEVE MOSKAL N 3/32 PLY1/16 BALSA 1/8 BALSA PLANKING RIBS 1/32 PLY TRIPLER3/32 BALSA 1/8 LITE PLY KEEL 1/16 BALSA SHEET 1/8 x 3/8 SPRUCE \1/8 LITE PLY N BLOCK BALSA 1/8 SQ SPRUCE LAM 1/3 BALSA 1/16 BALSA SAILPLANE1/16 BALSA 3/32 BALSA 1/8 50 SPRUCE N 7 N 1/16 BALSA SHEEt N N 1/8 x 1/4 SPRUCE N1/16 CAP STRIP N NNW xx N N N 1/16 WEB 00 Co_________ 0 Co 0 00 ____ 000 ____000r%3 000 _-F2 F-- so07G 00w4 0 -0ro - F yif F2GST4 F3 0i I/B LITE PLY Co _______________________CI 0 0 ro ___________________ ___0 0jCo NI/BLITEPLYKEEL w--BALSA BLOCKSHAPES KREMO VED FOR CLARITY 4-40 SOCKET4-4OBLINONUT HEAD BOLT C0 -BATTERY3/I650BALS /BOD BRASSI/8 BALSA PLANKING I/B PLY INSERT SPRUCE SKI I/BL AM r-LER- BOTH SIDES 82r IA B2CI 0- Dt DOUBLER FROM 3/32PLY C2 B3 B B B3 C 1 0 CI- 0 AILERON SERVO 3/16 50 BALSA 3/32 BALSA GUSSETS W II 3/32 WELL LINER LA JoZ WHEEL has said before countless articles Make up kit prior construction Get labeled model will fall together Ill repeat cost boring parts possible precut Notice 36-in top rear spar allows Left wing halves joined scrap tube note masking tape leading edge inside main tube rear incidence tube cut razor saw Right Epoxy 1As ply doublers Ri R2 Epoxy 1A-in-lD brass tube construction pics author 28 Model Aviation Co Ia C Full-Size Plans Available. Page 170 3/32 PLY1/8 BALSA BOTh SIDES E oII/lB BALSA_____ En T2T3 I/B BALSA ~2 NOTE PERK0___ SECTION C-CFILL WITH BALSA 7 CANOPY BOW I/8LITE PLYI/B BALSA PLY TRAYS - I/B I/4SPRUCE LONGERONS L/B3/B- I/B LITE PLY FILL K3/16BALS1/16 PLY WEB 82 TO 0I/BBALSA BOTH SIDES B I/4SPRUCE 1/BSPRUCEI/B BALSA 3/32 BALSA BOTH SIDES F I/BBALSAI/8oI/4SPRUCE / KANTENNA/I/B 00 WEL KEELANTENNA -I/BBALSA- 1/BSO SPRUCE I/BKEEL CANOPY BOW FORM TURTLEDECK STRINGERS REMOVED FOR CLARITY TT4I/4BAISA 8F2 C I/8LITE PLY I~f!I ___BALSA FILL rI/4BALSA WITH BALSAI/B DOWELSPRUCE LAMDOUBLWJ PERFECT 1/2 / I/B BALSAI/BSO/ WHEEL SAILPLANE NOTE TARER3732MUSIC WIREQUARTER SCALE DESIGNED AND DRAWN BY UCEL8SECTION 0-0DUBROAILERON[Yuii2ALlSi7 SHEET ONE OF TWO OI 4 Y 1177P sheet 75% chord model Finally select medium balsa ribs best contest-grade balsa can find sheeting other parts cant stress enough need build lightits secret success low Left false leading edge %2 balsa glued rib noses bottom leading edge sheeting ready glued place Right top sheeting ailerons leading edge shimmed back 1Ae balsa scraps allow capping aileron leading edge after its cut free February 1988 29 SPAR DETAIL 31/20WICMAKE TWO I/IGPLY _____3/BPINE FILL ENDS3/B BALSA FILL ENDSflA 31/20CUT LINE W2 MAKE TWO I/ILY I1L7A SECTION A-AH_ I/I6PLYBELLcRANK__ CUTOFF HORN III -BRO BALL LINK NOTE TRIMMED AND I BUILT UP AILERON SI-fARE ROM I/B BALSA GUIDE 11/2 TE PRING1/64______ NYRODRETURNPLY SECTION B-B __ TION C-C V7 I/I6BALSATE SHEETV SHAPE TIPBLOCK I/aID TUBEI/8 1/ SPR I/IGPLY- BLERSI/I6CAP STRIP I/16WE I/4 PLYTO R23 BLOCKKI/B W2-BAL SI/BI/ nut RIP2R3R4RSPRTRBR9RIDP11PIP13 }J1iI4P15 iijR1RP17 W I/lW WEB I/J3/B TO R26 SPRUCE I/I BALSA LE SHEET aspect ratio modelthe full-depth 6-in ply websWi and12-in section Butt two root ends Make two 59%-in spruce spar caps andW2 Mark position caps theand mark position refer plans Left Pin down left wing panel sheeting draw lines rib locations Note scrap pieces piy used guides make both halves Ri lean 350 provide scale dihedral Right spars should completed before cutting through brass tubing 30 Model Aviation Full-Size Plans Available. See Page 170 BOTTOM 202 CLOTHE BALSA TE SHEETTOP7/ -I I// __ /// / / --~18~~------ -I _--I / I/I6PLYFACING RIB MAKE TWOTOP 202 CLOTH ENOS]/ -0LET44RJGHT WEB CVERT GRAIN BALSA BLOCK TI SHIM I/BFOR WASHOUT 198 SHEET BAY I/IGPLYBOTTO _____________________________ OUNTTOP CUTOF ARM 0 R19R20R2IR22R23R24R25R26R27R28R2930 IStIEET TWO OF TW9 SA LE PIECE3/32BALSA FALSE LE 3A-in-OD brass tube cut 6% long ling around tube should extend 4 mark line position / x 3A-in spar capped scrap 1A6-in balsa ends root Dont force filler rear edge leading edge sheet Use cyanoacrylate CyA glue spar should slip fit Fill another 4 out Check leading edge sheet cut caps 12-in webs first checking with 3A-in balsa Now coat assembly oversize width allow attachment straightedges vertical alignment well filler spar caps epoxy 12 false leading edge Now draw lines correct taper tip satisfied root set rear rib locations leading edge trailing dihedral angle roughen brass 8-in-ply web butt-glue 4-in verti- edge Cut glue bottom root sheettube wipe acetone thinner tack cal balsa web After cure carefully ing cap strips aileron sheeting marks slow-setting CyA razor-saw through tube butt joint necessary dry finish drawing rib Cut piece %-in pine filler material Pin down leading edge trailing lines over pieces Glue bottom coat slow-setting epoxy prior fil- edge sheeting using straightedge spar cap leading edge sheet recheckLeft T-pins used maintain alignment spars epoxy cures Both W2 pieces epoxied spar Right Spar filler glued around 6/a-ln brass tube Use hardwood first 4 out root %in balsa remainder way out SCHWEIZER 1-268 SAILPLANE AC fltd BreD era c IOESIGNEO AND DRAWN BY ISTEVE IAnCWAJ bruary 1988 31 Left main brass tube tacked Wi ply webs Right An iiiustration gap ieft razor saw between in spar caps finished spar sections can later separated cleanly Note marked outline inside Wi webs used iocate tube spar caps satisfied fit glue ribs Make whatever corrections necessary fit upper cap glue ribs ensure proper alignment leading edge rib halves Ribs Ri through R6 pin straight piece scrap wood noses ribs R7 through next step glue 1-in balsa strips perimeter stab/elevator sheet RiO line up other Glue Ri 3 0 scale dihedral others 900 matching loft angle rib noses R6 Glue 36-in top rear x A-in spruce spar Make shim scrap balsa elevate trailing edge / R3 1 tapering zero thickness R24 Left Glue pre-tapered h-in balsa ribs biock balsa sievator horn mount stabilizer center ribs will filled scrap baisa later Right rudder fin laid up same way stab elevator Spruce spars glued over hinges aligned long piece music wire ilnes marked ribs before Alcohol softens balsa bend around curve 32 Model Aviation stab elevator construction begins Draw lines sheeting act guides pinning down sections balsa Large following full-scales rib locations Klett hinges set next pre-tapered spruce spars glued place ing straightedge right angle Po sition rear half Ri using 3 jig made scrap ply glue spar bottom sheet Continue rear halves R2 through R6 Slip ribs R7 through R3 1 between Left Balsa cores Ae sheeting prepared Note fin spar 1/a x %-in spruce tapered match rudderand its length will allow glued fuselage former F Right Du-Bro ball link plans show aileron ball link bolted piece brass sheet has silver soldered %2 music wire Trim fin spar bottom allow travel arm slip underneath Cut A-in balsa vertical webs fit snugly between ribs R19 R30 trim flush rib top angles Trim hinging system Before its glued trim bottom web between Ribs R22 R23 allow clevis pass through connect trimmed Du-Bro nylon horn Glue two false aileron ribs shaped R22 capture horn Glue aileron ribs Rl9b R3Ob side respective main ribs standing off A2 Add vertical-grain balsa webs spar called plan Glue spoiler in spruce subspar double outside Ribs R13 R18 scrap A-in balsa shaped top curve R12 Roughen aileron pushrod tubes attach points Ri R2 R20 R2 1 epoxy place same fash ion epoxy spoiler tubes Ri R2 R13 R14 R15 Also add A-in ply block inside Ri screw eye mount Carefully trim false leading edge %2-in balsa slightly oversize sanding slight angle bottom edge match rib curve After trimming necessary glue false leading edge bottom point rib noses leaving excess width extending above nose tops Pro tect tops ribs masking tape sand false leading edge down ly working toward angle curve top sheeting Bring bottom leading edge sheet up contact ribs false leading edge glue fast-setting CyA Install half-ribs Rib through R4b Glue top trailing edge sheeting Ri R19 pin down securely Also glue vari ous pieces aileron sheeting tops aileron spar aileron leading edge trailing edge diagonals /16-in balsa simulate diagonal ribs full-scale aileron Slip pre-drilled /6-in-ply aileron bellcrank mount place cable Du-Bro metal clevis connected bellcrank check action eliminate binding CyA mount two ribs Make up short pushrod threaded both ends Du-Bro ball joint connector bellcrank end metal clevis aile ron horn end rods will installed later prior covering Draw lines match rib tops underside leading edge sheet Use thixotropic heavy viscosity epoxy like Hobbypoxy Formula III apply rib tops false leading edgenot top spar cap Apply thin coat epoxy rib line avoiding rear cap contact point Carefully position top leading edge sheeting top cap approximately forward rear edge cap aligned attach rear edge sheet cap fast-setting CyA Gently smooth bend sheeting ward hand paint roller suring proper adhesion epoxy pin tape masking sheeting false leading edge fussy about fit sheeting lays down smoothly old phone books can ensure proper bend pressure Allow over night cure Trim excess balsa leading edge sheeting meets false leading edge sand flush Rough-cut first leading edge piece A-in balsa slightly oversize Glue false leading edge securing place pins dry add final piece leading edge material cut y16-in balsa sheet Add cap strips rib tops R20 through R29 Unpin wing panels board Plane rough-shape leading edges carefully tapering toward tip Sheet area between R30 R3 1 add balsa tip block Note cut block material proper angle prior gluing need sand top tip block get proper curve February 1988 33 Above The robust fuselage provides enormous amount room radio installation Notice routing spoiler line spoiler servo center location aileron/rudder servo allows coordination V-harness electronic manip ulation Large opening Lite Ply floor allows easy access re ceiver antenna tube Right long wire pin used secure elevator stab allows elevator removed Remove aileron cables join panels small piece 42-OD brass tube root ribs flush other Lay section down flat block up other section about mid-panel Roughen 4-in-ID brass tube cut 414 long seal ends scrap balsa clean solvent Separate panels slip tube through ribs six pre-drilled 46-in ply doublers root ribs aligned other pin leading trailing edges match Take time correct holes ribs doublers nec essary get unforced fit Coat dou blers thin layer slow-cure epoxy clamp ribs building small fillet epoxy inside joints After cure cut through tube carefully razor saw before Reposition wings washout shims place pin se curely complete top sheeting cap strips Cut spoiler blades 1-in trian gular trailing edge stock cut piece 4 ply exact dimensions front bottom piece Thinly coat ply epoxy tape bottom blade prevent shifting lay bay Weight assembly light pressure After curing protect sheeting surrounding box masking tape sand blade level sheeting duplicate airfoil curve MonoKote hinging system glue spruce bass strip fill 4-in gap between top leading edge sheet spoiler leading edge Install blade horn small Du-Bro return spring hook up spoiler string checking action binding eliminated Remove panel board cut aileron free sawing through rib carefully avoiding aileron spar Sand aileron leading edge angle 650 sand flush ribs protruding 4-in spar Face aileron A6-in balsa leaving notch born small Du-Bro aileron temporar ily taped place install short pushrod bellcrank Epoxy horn base removed between false ribs Bring aileron neutral position epoxy still uncured clip clevis Pin clamp aileron neutral allow cure Trim facing rib 46 ply match profile sheeted root rib final step glassing roots 2-oz cloth Cover bottom first section cut angle 4 out trailing edge 8 out leading edge top piece should end 8 out trailing edge 12 out lead ing edge used Hobbypoxy Formula II squeegeed out maximum amount resin After cures tape adjacent balsa areas masking tape prevent oversanding lightly sand cloth No second coat needed Fill Model Magic Filler Fill bench rash dings voids Model Magic Filler give wing finish sanding using Tee-Bar similar true-sanding tool Use heavier grit spar ingly complete final sanding 600 grit will give best finish base film covering like MonoKote used Tail surfaces scale outline 34 Model Aviation stab 12% total wing area ever did care flat plate section full-scale aircraft Therefore show 9%-thick diamond airfoil used prototype Cut shape sections /6-in very light balsa sheeting stab elevator outlines pin down Pencil scale rib positions Cut out lightening holes now desired Plane sand 4 x %-in spruce strips correct taper Glue two trailing edge stab leading edge elevator Correct mismatch sanding block Glue 4-in sq balsa strip stock leading trailing edge perimeters halves Use 4x h-in balsa stabilizer tips Glue pre-shaped triangular 4-instock ribs Remove halves relieve 46-in sheet spruce spars large Klett hinges loose pins Finish opposite side previous steps sand fin ished stabilizer shaping rounded lead ing edge sharper trailing edge elevator Install large Klett hinges slow-setting CyA using piece 032 music wire least 25 long keep hinges aligned other Add balsa block filler between lower upper center ribs stabilizer decide stab will removable see fuselage construction text Add A-in balsa pieces top bot tom elevator hinge line Tap elevator horn screws harden holes CyA Join two sections 032 wire round spruce leading edge elevator 1 travel direction Build fin rudder same man ner stabilizer elevator Note fins spruce spars extend down approxi mately 2 below F2 mate former F Add 3/ music wire arm rudder allow actuated inside fuse lage arm bent cut accept Du-Bro aileron ball link rudder must swing 300 deflection either direction former F has notched allow full left throw full throw elevator wire can withdrawn screwdriver blade inserted tail cone open metal clevis stabilizer unbolted Left An overhead shot rudder deflected left stab has removed reveal Du-Bro metal clevis used connect el evator horn within hollowed-out tail cone Right left spoiler fully raised show spring retainer small control horn Its good idea place name ad dress model case should ever fly away Also AMA Safety Code re quires model identified either name address AMA number S Fuselage Begin box sides trimming joining 1/16 balsa sheet /16 ply over outline wax-paper-covered plan Use ply B2 D proceed aft /16 balsa lightest weight making sure grain running vertically Glue /8 x A-in spruce strips perime ter section Remove wax paper complete right side Fill space between spruce longe rons B2 D %-in Lite Ply shape F2 Using Formula II epoxy Y32 ply pieces PL PR spruce strips parts touch Lite Ply spruce except lower longeron area aft former D cured carefully align tape two sections together drill %-in hole main tube 3146-in holes rear incidence spoiler tubes Separate two sections drill re spective Y6-in aileron cable holes Route out openings screw eyes Drill through Cl D elevator cable tube separate drill rudder cable tube hole D spoiler tube holes Cl Mark inside surface two fuse lage box sides x A-in spruce dou blers leaving gaps B2 Cl stopping D Cut strips glue inside noting bottom strips raised 42 allow later addition box floor Glue B2 Cl D using right trian gles check squareness formers side sides building board satisfied clamp sides gether Epoxy doubler tripler cut x %-in spruce flush top Cl glue x A-in spruce joints aft B2 either side Cl forward D tripling area top Cl will allow surface secure %-in brass tube epoxy brass tubes until satisfied wing aligmuent Wings should easily slip both main rod A2in drill rod tempered Rockwell C-Scale 42-45 incidence setting rod use incidence tube hole neces sary Brush Formula II add medium-weight glass cloth over both tubes contacting respective formers box sides Cut rectangle %2-in ply servo tray aft B2 cutouts servos switch harness rest box floor will formed 3A2-in balsa grain running side side used small piece 3A2-in ply cut out aileron servo aft Cl continued %2-in balsa E Flip box over mark centerline bottom B2 D Glue square strips /6 balsa either side line corresponding A-in thickness keel Trial fit Lite Ply keel servos place eye toward routing wires airborne system Make cutouts now left 3-in gap floor aft ply tray no apparent loss strength battery goes behind former 12 Ab pack recommended Trim keel pack leaving some space foam also After B 1 cut trace duplicate balsa ply use forward canopy tray Also trace one-piece copy former %2-in aircraft ply Make up A-in balsa ply pieces epoxied together right gles secret gentle heating epoxy heat gun flows will spread thinly over sheet Cut out turtledeck formers Tl through T3 A-in balsa T4 cut Lite Ply Notching should done after theyre glued place should already have decided point subject stringernosed sheeted area tar fledeck sheeted Trim formers areas allow sheet planking material Steady box bench slip wings rods checking fit PL PR Use straightedges keep sides square use pins board keep PL PR flush root ribs Bend sides together aft E Cut former E A-in balsa glue after drilling cable tubes Glue T4 F aligning center F points equidistant wing trail ing edges Mount fin platform F2 true fin right triangle Set fin aside epoxy F2 T4 F Stab mount S should epoxied now Line stab up hinge line right angle fuselage centerline tack glue S Drill two holes A-in nylon mounting bolts through balsa block stab S Counter sink balsa allow bolt heads sit flush top stab Lubricating bolts Vaseline put through stab snug up nuts satisfied stabs alignment run bead slow-cure CyA around nut February 1988 35 U author assembles Schweizer beginning two blistering 100 contest days first certainly last SOAR Scale Uprising Photo Dave Haertel Jack Hiner launches model author can concentratIon grabbing lots altitude Using helper launch lathe best way handle Sailpianes size Mike Macintyre plc Designed Ken Willard eamater 4 ON-Board Battery Tester Saves Time. Saves Models Install RC Models Check receiver battery status press button Small Light /2 oz Precise Rugged RX-1ORDER TODAY $1495at dealer Protune Corp 914 462-6452 USAP 0 Box 1808 Poughkeepsie NY 12601 U rims touch underside mount Glue scrap standing tail ends PL PR away gentle bend fit selage sides flush root ribs Glue A-in spruce dowel PL PR ap proximately F Install tubes elevator aile ron servo cables securing form ers epoxy small patch medium-weight glass cloth critical keeping tubes bending pop ping away formers under fight loads What can get away small Gliders woefully inadequate quarterscale models Notch turtledeck formers receive % x A-in spruce longerons Round top edges longerons prior gluing Make up keel epoxy %-in ply inserts receive brass wood screws used mounting skid Glue keel key piece A6-in balsa strips touches B 1 B2 B3 Glue former halves B3 C2 Laminate keel 2 ply either side skid mounting area save weight used 3-in ultralight wheel JoZ Products well liner %2-in balsa wetted slightly allow bend Glue glue %-in triangular balsa gussets brace keel After rounding outer edges glue first two horizontal ply nose formers will simu late tubing B2 after rounding outer edges should able use two pieces -in balsa sheet per side plank between B3 C2 Glue doubler strips balsa keel flush b6ttom B3 C2 planking support same planking will touch PL PR After planldng add rest Lite Ply shapes 3 Glue Bi finish formers Bi Cut canopy trays carefully A-in balsa ply begin work front can opy fitting up balsa ply former prepared match Bi Shape rear bow tray laminating two pieces 46 bass about /16 wide over former Trial fit bow tray after notching two rear corners glue sat isfied rear tray reverse aft shape matching Ti ward shape laminated bass matching front bow Finish trays two coats Formula H epoxy paint flat gray epoxy enamel provides best surface gluing canopy Wil holds RC-56 Plan instrument panel pilota DGA quarter-scale bust what chose because its light weight 1-26 steel tube turnover structure under rear canopy used Sullivans outer sleeves simulate thisdrinking straws would work just well Cover glue joints canopies touch trays bows strips painted plastic simu late aluminum framework rear can opy clear acetate sheet Continued page 129 36 Model Aviation Flies off both land water Crisply die-cut balsa ito ply parts complete hardware eas sembly sensible engineeng Qlear plans p oto illustrated assembly manual 50K229 Complete Catalog $200 ordered direct add Han 16 W 19th St PO Box 511 E7 Higginsville MO N64037 call 816 584-7121 Safety/Preston Continued page 22 ter received Stasi Poulos Dallas TX recently helping newcomer RC fly ing soloed become quite confident ability lost almost fear about flying wind day watched him take off 15 mph steady headwind ascent beautiful could until turned downwind made decision throttle back since plane seemed pick up much speed downwind leg plane banked slightly tried correct bank ailerons horror hollered ailerons werent work ing Yet still throttle elevator control Convinced victim chanical radio failure handed threw transmitter regained control landed tried explain him what happened plane turned downwind its air speed did change its speed over ground did student felt plane passing him too fast solution throt tIe back failed realize did re duce speed plane passed him no real indication planes airspeed reduced airspeed until plane stalled Ailerons change lift aircrafts wings no lift can swing want youll never know difference student said No way plane wasnt moving slow What really saw however stalled plane moving air mass Stasis description incident makes wonder radios have sent off correction failures really didnt occur opinion appreciation visual effect wind models flight characteristics has direct bearing safely fly Have safe month watch out downwind turns Schweizer/Moskal Continued page 36 forward canopy molded piece plastic clamped frame heated oven drawn over wooden plug method has described times other articlesone best being Steve Gray March 1987 issue Model Builder would rather make canopy available ready-made Shabo Scale 2416 North 66th Wauwatosa WI 52213 Plan canopy hold-downsrubberbands mini ature hooks simplest lightest Route pair inner Nyrods PL PR spoiler servo glue Install airborne gear check ac tions correcting binding rubbjng Complete turtledeck structure add crossgrain floor Xe-in balsa E U Glue both halves F3 four A-in balsa lower main stringer standoffs Laminate lower main stringer two pieces A-in-sq spruce Glue stand off formers /6-in floor fuse lage glue stringer running keel G Glue 1/16 angular balsa gussets brace standoffs floor Add piece Y32-sq spruce doubling top longeron Tl tapering aft F Complete two lower stringers running C2 F3 aft F3 keel Form skid two pieces 1A x /2-in spruce laminating form made common nails board Drill skid screw attach points re move cover glass cloth paint match scheme Some 1-26 aircraft fabric fairing cover gap between skid fuselage quite often no fair ing used tail nose cone built up balsa Shape tail cone A-in core Lite Ply hold shape ply core doubled A-in balsa carved correct taper Tack-glue fuselage check maximum travel elevator horn will later glued after painting covering carefully drilled center nose cone after shaping soft balsa %2-in ply disc matches former 4-40 hex head bolt eased piece -in brass tube used bushing created N shape 3A2-in ply would slip behind drilled 4-40 blind mounting nut holds nose cone place bolt tight ened access hole 4-40 bolt serves scale air vent common 1-26 nose cones battery pack way also has advantage being acces sible acts balancing weight STICKY BUSINESS NOW AVAILABLE ON VHS VIDEO ADHESIVEUU Frank Tiano Producer Bob Violett nician ira KEEP YOU OWED TO YOUR SEAT Contains everything want know about Zap Loctite adhesive product informative Humorous 2 hours two intermissions ideal club meetings Produced Frank Tiano Techniques Frank Tiano Bob Viotett NOW AVAILABLE FOR SHOWING $3495 Plus $2 Shipping & Handling Name CityState __________ Zip Send $3695 $3495 plus $2 shipping & handling check money order Frank Tiano Enterprises 2460 SW 85 Terrace Davie FL 33324 Allow 4-6 weeks delivery Sorry cannot deliver post office boxes MA February 1988 129 WORLD CLASS tA Retr *6 Tony Frackowiaks Challenge IV Kit Atlanta KitDash Kit Hattori Headers Pipes AMA&FAIRC Aerobatic Specialties PO Box 388914-248-8603 Lincoindale NY 10540 Send $100 catalog FIBERGLASS PARTS Over 237 cowls kit scratch built models Also over 34 round cowls ranging 4 14-718 diameter 55 duff size & shape wheel pants custom Make Parts Vacuum Form Canopies Pining send $1 unqist kt TAD FIBERILASS SPECIALTIES 30925 nlock Dept 4 Garden city Ml 48135 PHONE 313421-6358 BRAZED & HEAI-TREAIED WIRE GEARS & CABANES PHONE 313 261-9064 experience Great Performance Quartet DALOTEL 850 SPAN 69 ins WING AREA 830 sq ins CHIPMUNK 850 SPAN 70 ins WING AREA 850 sq ins SPAN 76 SPAN 72 ins EXTRA 230 WING AREA 900 sq ins ZLIN 526 WING AREA 900 sq ins 4 ALL BALSA ARFS AT ONE GREAT PRICE HOLIDAY SPECIAL $185 ea available direct select hobby shops c ZIMPRO MARKETING nose cone assembly glassed 2-oz cloth covered coat Formula II epoxy filled Model Magic Filler Now time plan unique details particular subject prior covering youve ever covered rubber-powered model silkspan-and-dope ap proach fuselage same except youll no doubt want use heat-shrink covering did easiest way cover stringered nose cut triangular section oversize starting top keel work downwards section sectionone large piece wont work rest fuselage can done three segments stringered turtledeck first left right sides down centerline Before covering glue inspection fair ing balsa rudder horn provide ac cess linkage needed scale inspection cover balsa circle covered MonoKote tack-glued fair ing after final covering Mount gear including main tail wheel Perfect -in balance model indi cated safe point Install radio fly ing surfaces check action controls rudder should have maxi mum 300 deflection either way ele vator should need /2-in maximum throw up down ailerons should have minimum differential 31that three up down spoilers need maximum throw 450 extremely effective fully open Epoxy fin F F2 after fuselage covered connect linkage glue inspec tion hatch Balancing mean aerodynamic chord MAC calculation see Brad Powers arti cle Model Aviation May 1980 has al ways resulted proper balance Sailplanes Ive calculated 1-26 MAC 12y6 translates 30% MAC measured root rib safe balance point model experience previ ous mid-winged Glider bridle launch very safe rings falls off mid-launch allows maxi mum rotation launch Balance plane prior covering adding weight far READY TO FLY Call 1-800-45-TO FLY *LOW PRICES *EASY TO ASSEMBLE *NO BUILDING *NO PAINTING Piper Cherokee-40$13099 Piper Cherokee-259599 Fokker E111-4010799 Fancy Stick-256599 Cessna 172-208999 engine included Eh SUNSHINE HOBBY 17721 South Western Avenue Gardens California 90247 forward possible minimize all-up weight care selection materi als use glues should result un covered airframe balancing 30% mean aerodynamic chord case prototype Covering marking used Super MonoKote because desire keep things light MonoKote trim sheets large letters Duplicating national signia made easy using Sigs stickon decalsluckily smaller size sheet perfect scale smaller mili tary nomenclature letters no push lift etc vinyl rub-ons After some experimentation found work best rubbed onto small section Mono Kote placed position cov ered wax paper sealed iron low temperature slightly below EconoKote range Youll note red flash running nose tail stock red K&B Superpoxy paint sprayed MonoKote after wiping clean ac etone masking pattern Install steel shoulder hook hardware store root about lage sides Remove hooks harden tapped hole CyA hooks will removable display judging Install main wheel cutting small hole Mono Kote side opposite axle hole Slip brass tube axle securing dab epoxy Now patch MonoKote Make up bridle least l00-lb-test braided nylon choose partner ex perience launching large Sailplanes Have him hold model left hand cupped front left leading edge right hand about T3 fuse first flights launch straight forward after gaining flying speed rotate gently up Radio Technique/Myers Continued page 39 Electronics Inc PO Box 996 Hauppauge NY 11788 telephone 516 265-1325 came neatest things Ive seen years wit Multicore Tip Tinner/Cleaner TTC 1 See photoContinued page 132 -Also Am0NCL Li6B/cHAI 84 fl SPAN VULT BT-13 VALIANT 84 IN SPAN ROLLED PlAN SE-- $20 ELCH FThERGIASS CC7JIS--------- *20 EkCH ADD 12oSHPflfGNYS ADD 8TAZ 130 Model Aviation PO BOX 3076 OAK RIDGE TN 37830 PHONE 61 5482-61 88 AERaTCLL3~/l\ FLYING iA SCAlE SPORT SCAlE AERONCA L3/EFNDEE105 IN 2 CYClE 90-13 II 4 CYClE 12-18 AERO PlANS N PARTS PO BOX 939 OIEAR NY 14760 1 372
Edition: Model Aviation - 1988/02
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 129, 130
acse spo estimatt perfori rining thai nvciled on0-de kit concept era joined at&ircr nd buyeras work rce tri rnng p 31 nice shape 5043-26 collection 01 inc r Pa oulder ho ors wife -26 Just offer mentioned ss rugg 1 RC pen allows rat spa malistic canca three neces model saus F ering eagles pea atten L-R ASK 7 IS 1515 pI1 lanes demi aistIc cr0 demand SingSt 1V57 401-26B Ti used Cobalt dished three-views v start documenting s did owners o d pencil add ur three-view judges understand ncies between di present b variations con Vintage Sailplan eem5 lad Bob # w dollars repairing tl fabric noses us almost e converted ig nose area think o r aspect ratIo design coupled dent ailerons makes tighter radius enhances model ws ability stay weak thermals build 1-26 wide variety markings available mod &Imost gliderport US has Ive found owners fiatthat someone might build miniature ir personal sailplane Finally few Sailplanes offer portability like lave make models fit Plymouth TC-3 custom convertwait Load camera doc tuat full-size 1-26 ruction Start wings tiue described will create correctly set wings later allows fu erly fitted wings original USAF 1-26 posed Al also delivered finished same drami 26 Model Aviation o delivery location ONE QUARTER SCALE ________ 126 B STEVE MOSKAL N 3/32 PLY1/16 BALSA 1/8 BALSA PLANKING RIBS 1/32 PLY TRIPLER3/32 BALSA 1/8 LITE PLY KEEL 1/16 BALSA SHEET 1/8 x 3/8 SPRUCE \1/8 LITE PLY N BLOCK BALSA 1/8 SQ SPRUCE LAM 1/3 BALSA 1/16 BALSA SAILPLANE1/16 BALSA 3/32 BALSA 1/8 50 SPRUCE N 7 N 1/16 BALSA SHEEt N N 1/8 x 1/4 SPRUCE N1/16 CAP STRIP N NNW xx N N N 1/16 WEB 00 Co_________ 0 Co 0 00 ____ 000 ____000r%3 000 _-F2 F-- so07G 00w4 0 -0ro - F yif F2GST4 F3 0i I/B LITE PLY Co _______________________CI 0 0 ro ___________________ ___0 0jCo NI/BLITEPLYKEEL w--BALSA BLOCKSHAPES KREMO VED FOR CLARITY 4-40 SOCKET4-4OBLINONUT HEAD BOLT C0 -BATTERY3/I650BALS /BOD BRASSI/8 BALSA PLANKING I/B PLY INSERT SPRUCE SKI I/BL AM r-LER- BOTH SIDES 82r IA B2CI 0- Dt DOUBLER FROM 3/32PLY C2 B3 B B B3 C 1 0 CI- 0 AILERON SERVO 3/16 50 BALSA 3/32 BALSA GUSSETS W II 3/32 WELL LINER LA JoZ WHEEL has said before countless articles Make up kit prior construction Get labeled model will fall together Ill repeat cost boring parts possible precut Notice 36-in top rear spar allows Left wing halves joined scrap tube note masking tape leading edge inside main tube rear incidence tube cut razor saw Right Epoxy 1As ply doublers Ri R2 Epoxy 1A-in-lD brass tube construction pics author 28 Model Aviation Co Ia C Full-Size Plans Available. Page 170 3/32 PLY1/8 BALSA BOTh SIDES E oII/lB BALSA_____ En T2T3 I/B BALSA ~2 NOTE PERK0___ SECTION C-CFILL WITH BALSA 7 CANOPY BOW I/8LITE PLYI/B BALSA PLY TRAYS - I/B I/4SPRUCE LONGERONS L/B3/B- I/B LITE PLY FILL K3/16BALS1/16 PLY WEB 82 TO 0I/BBALSA BOTH SIDES B I/4SPRUCE 1/BSPRUCEI/B BALSA 3/32 BALSA BOTH SIDES F I/BBALSAI/8oI/4SPRUCE / KANTENNA/I/B 00 WEL KEELANTENNA -I/BBALSA- 1/BSO SPRUCE I/BKEEL CANOPY BOW FORM TURTLEDECK STRINGERS REMOVED FOR CLARITY TT4I/4BAISA 8F2 C I/8LITE PLY I~f!I ___BALSA FILL rI/4BALSA WITH BALSAI/B DOWELSPRUCE LAMDOUBLWJ PERFECT 1/2 / I/B BALSAI/BSO/ WHEEL SAILPLANE NOTE TARER3732MUSIC WIREQUARTER SCALE DESIGNED AND DRAWN BY UCEL8SECTION 0-0DUBROAILERON[Yuii2ALlSi7 SHEET ONE OF TWO OI 4 Y 1177P sheet 75% chord model Finally select medium balsa ribs best contest-grade balsa can find sheeting other parts cant stress enough need build lightits secret success low Left false leading edge %2 balsa glued rib noses bottom leading edge sheeting ready glued place Right top sheeting ailerons leading edge shimmed back 1Ae balsa scraps allow capping aileron leading edge after its cut free February 1988 29 SPAR DETAIL 31/20WICMAKE TWO I/IGPLY _____3/BPINE FILL ENDS3/B BALSA FILL ENDSflA 31/20CUT LINE W2 MAKE TWO I/ILY I1L7A SECTION A-AH_ I/I6PLYBELLcRANK__ CUTOFF HORN III -BRO BALL LINK NOTE TRIMMED AND I BUILT UP AILERON SI-fARE ROM I/B BALSA GUIDE 11/2 TE PRING1/64______ NYRODRETURNPLY SECTION B-B __ TION C-C V7 I/I6BALSATE SHEETV SHAPE TIPBLOCK I/aID TUBEI/8 1/ SPR I/IGPLY- BLERSI/I6CAP STRIP I/16WE I/4 PLYTO R23 BLOCKKI/B W2-BAL SI/BI/ nut RIP2R3R4RSPRTRBR9RIDP11PIP13 }J1iI4P15 iijR1RP17 W I/lW WEB I/J3/B TO R26 SPRUCE I/I BALSA LE SHEET aspect ratio modelthe full-depth 6-in ply websWi and12-in section Butt two root ends Make two 59%-in spruce spar caps andW2 Mark position caps theand mark position refer plans Left Pin down left wing panel sheeting draw lines rib locations Note scrap pieces piy used guides make both halves Ri lean 350 provide scale dihedral Right spars should completed before cutting through brass tubing 30 Model Aviation Full-Size Plans Available. See Page 170 BOTTOM 202 CLOTHE BALSA TE SHEETTOP7/ -I I// __ /// / / --~18~~------ -I _--I / I/I6PLYFACING RIB MAKE TWOTOP 202 CLOTH ENOS]/ -0LET44RJGHT WEB CVERT GRAIN BALSA BLOCK TI SHIM I/BFOR WASHOUT 198 SHEET BAY I/IGPLYBOTTO _____________________________ OUNTTOP CUTOF ARM 0 R19R20R2IR22R23R24R25R26R27R28R2930 IStIEET TWO OF TW9 SA LE PIECE3/32BALSA FALSE LE 3A-in-OD brass tube cut 6% long ling around tube should extend 4 mark line position / x 3A-in spar capped scrap 1A6-in balsa ends root Dont force filler rear edge leading edge sheet Use cyanoacrylate CyA glue spar should slip fit Fill another 4 out Check leading edge sheet cut caps 12-in webs first checking with 3A-in balsa Now coat assembly oversize width allow attachment straightedges vertical alignment well filler spar caps epoxy 12 false leading edge Now draw lines correct taper tip satisfied root set rear rib locations leading edge trailing dihedral angle roughen brass 8-in-ply web butt-glue 4-in verti- edge Cut glue bottom root sheettube wipe acetone thinner tack cal balsa web After cure carefully ing cap strips aileron sheeting marks slow-setting CyA razor-saw through tube butt joint necessary dry finish drawing rib Cut piece %-in pine filler material Pin down leading edge trailing lines over pieces Glue bottom coat slow-setting epoxy prior fil- edge sheeting using straightedge spar cap leading edge sheet recheckLeft T-pins used maintain alignment spars epoxy cures Both W2 pieces epoxied spar Right Spar filler glued around 6/a-ln brass tube Use hardwood first 4 out root %in balsa remainder way out SCHWEIZER 1-268 SAILPLANE AC fltd BreD era c IOESIGNEO AND DRAWN BY ISTEVE IAnCWAJ bruary 1988 31 Left main brass tube tacked Wi ply webs Right An iiiustration gap ieft razor saw between in spar caps finished spar sections can later separated cleanly Note marked outline inside Wi webs used iocate tube spar caps satisfied fit glue ribs Make whatever corrections necessary fit upper cap glue ribs ensure proper alignment leading edge rib halves Ribs Ri through R6 pin straight piece scrap wood noses ribs R7 through next step glue 1-in balsa strips perimeter stab/elevator sheet RiO line up other Glue Ri 3 0 scale dihedral others 900 matching loft angle rib noses R6 Glue 36-in top rear x A-in spruce spar Make shim scrap balsa elevate trailing edge / R3 1 tapering zero thickness R24 Left Glue pre-tapered h-in balsa ribs biock balsa sievator horn mount stabilizer center ribs will filled scrap baisa later Right rudder fin laid up same way stab elevator Spruce spars glued over hinges aligned long piece music wire ilnes marked ribs before Alcohol softens balsa bend around curve 32 Model Aviation stab elevator construction begins Draw lines sheeting act guides pinning down sections balsa Large following full-scales rib locations Klett hinges set next pre-tapered spruce spars glued place ing straightedge right angle Po sition rear half Ri using 3 jig made scrap ply glue spar bottom sheet Continue rear halves R2 through R6 Slip ribs R7 through R3 1 between Left Balsa cores Ae sheeting prepared Note fin spar 1/a x %-in spruce tapered match rudderand its length will allow glued fuselage former F Right Du-Bro ball link plans show aileron ball link bolted piece brass sheet has silver soldered %2 music wire Trim fin spar bottom allow travel arm slip underneath Cut A-in balsa vertical webs fit snugly between ribs R19 R30 trim flush rib top angles Trim hinging system Before its glued trim bottom web between Ribs R22 R23 allow clevis pass through connect trimmed Du-Bro nylon horn Glue two false aileron ribs shaped R22 capture horn Glue aileron ribs Rl9b R3Ob side respective main ribs standing off A2 Add vertical-grain balsa webs spar called plan Glue spoiler in spruce subspar double outside Ribs R13 R18 scrap A-in balsa shaped top curve R12 Roughen aileron pushrod tubes attach points Ri R2 R20 R2 1 epoxy place same fash ion epoxy spoiler tubes Ri R2 R13 R14 R15 Also add A-in ply block inside Ri screw eye mount Carefully trim false leading edge %2-in balsa slightly oversize sanding slight angle bottom edge match rib curve After trimming necessary glue false leading edge bottom point rib noses leaving excess width extending above nose tops Pro tect tops ribs masking tape sand false leading edge down ly working toward angle curve top sheeting Bring bottom leading edge sheet up contact ribs false leading edge glue fast-setting CyA Install half-ribs Rib through R4b Glue top trailing edge sheeting Ri R19 pin down securely Also glue vari ous pieces aileron sheeting tops aileron spar aileron leading edge trailing edge diagonals /16-in balsa simulate diagonal ribs full-scale aileron Slip pre-drilled /6-in-ply aileron bellcrank mount place cable Du-Bro metal clevis connected bellcrank check action eliminate binding CyA mount two ribs Make up short pushrod threaded both ends Du-Bro ball joint connector bellcrank end metal clevis aile ron horn end rods will installed later prior covering Draw lines match rib tops underside leading edge sheet Use thixotropic heavy viscosity epoxy like Hobbypoxy Formula III apply rib tops false leading edgenot top spar cap Apply thin coat epoxy rib line avoiding rear cap contact point Carefully position top leading edge sheeting top cap approximately forward rear edge cap aligned attach rear edge sheet cap fast-setting CyA Gently smooth bend sheeting ward hand paint roller suring proper adhesion epoxy pin tape masking sheeting false leading edge fussy about fit sheeting lays down smoothly old phone books can ensure proper bend pressure Allow over night cure Trim excess balsa leading edge sheeting meets false leading edge sand flush Rough-cut first leading edge piece A-in balsa slightly oversize Glue false leading edge securing place pins dry add final piece leading edge material cut y16-in balsa sheet Add cap strips rib tops R20 through R29 Unpin wing panels board Plane rough-shape leading edges carefully tapering toward tip Sheet area between R30 R3 1 add balsa tip block Note cut block material proper angle prior gluing need sand top tip block get proper curve February 1988 33 Above The robust fuselage provides enormous amount room radio installation Notice routing spoiler line spoiler servo center location aileron/rudder servo allows coordination V-harness electronic manip ulation Large opening Lite Ply floor allows easy access re ceiver antenna tube Right long wire pin used secure elevator stab allows elevator removed Remove aileron cables join panels small piece 42-OD brass tube root ribs flush other Lay section down flat block up other section about mid-panel Roughen 4-in-ID brass tube cut 414 long seal ends scrap balsa clean solvent Separate panels slip tube through ribs six pre-drilled 46-in ply doublers root ribs aligned other pin leading trailing edges match Take time correct holes ribs doublers nec essary get unforced fit Coat dou blers thin layer slow-cure epoxy clamp ribs building small fillet epoxy inside joints After cure cut through tube carefully razor saw before Reposition wings washout shims place pin se curely complete top sheeting cap strips Cut spoiler blades 1-in trian gular trailing edge stock cut piece 4 ply exact dimensions front bottom piece Thinly coat ply epoxy tape bottom blade prevent shifting lay bay Weight assembly light pressure After curing protect sheeting surrounding box masking tape sand blade level sheeting duplicate airfoil curve MonoKote hinging system glue spruce bass strip fill 4-in gap between top leading edge sheet spoiler leading edge Install blade horn small Du-Bro return spring hook up spoiler string checking action binding eliminated Remove panel board cut aileron free sawing through rib carefully avoiding aileron spar Sand aileron leading edge angle 650 sand flush ribs protruding 4-in spar Face aileron A6-in balsa leaving notch born small Du-Bro aileron temporar ily taped place install short pushrod bellcrank Epoxy horn base removed between false ribs Bring aileron neutral position epoxy still uncured clip clevis Pin clamp aileron neutral allow cure Trim facing rib 46 ply match profile sheeted root rib final step glassing roots 2-oz cloth Cover bottom first section cut angle 4 out trailing edge 8 out leading edge top piece should end 8 out trailing edge 12 out lead ing edge used Hobbypoxy Formula II squeegeed out maximum amount resin After cures tape adjacent balsa areas masking tape prevent oversanding lightly sand cloth No second coat needed Fill Model Magic Filler Fill bench rash dings voids Model Magic Filler give wing finish sanding using Tee-Bar similar true-sanding tool Use heavier grit spar ingly complete final sanding 600 grit will give best finish base film covering like MonoKote used Tail surfaces scale outline 34 Model Aviation stab 12% total wing area ever did care flat plate section full-scale aircraft Therefore show 9%-thick diamond airfoil used prototype Cut shape sections /6-in very light balsa sheeting stab elevator outlines pin down Pencil scale rib positions Cut out lightening holes now desired Plane sand 4 x %-in spruce strips correct taper Glue two trailing edge stab leading edge elevator Correct mismatch sanding block Glue 4-in sq balsa strip stock leading trailing edge perimeters halves Use 4x h-in balsa stabilizer tips Glue pre-shaped triangular 4-instock ribs Remove halves relieve 46-in sheet spruce spars large Klett hinges loose pins Finish opposite side previous steps sand fin ished stabilizer shaping rounded lead ing edge sharper trailing edge elevator Install large Klett hinges slow-setting CyA using piece 032 music wire least 25 long keep hinges aligned other Add balsa block filler between lower upper center ribs stabilizer decide stab will removable see fuselage construction text Add A-in balsa pieces top bot tom elevator hinge line Tap elevator horn screws harden holes CyA Join two sections 032 wire round spruce leading edge elevator 1 travel direction Build fin rudder same man ner stabilizer elevator Note fins spruce spars extend down approxi mately 2 below F2 mate former F Add 3/ music wire arm rudder allow actuated inside fuse lage arm bent cut accept Du-Bro aileron ball link rudder must swing 300 deflection either direction former F has notched allow full left throw full throw elevator wire can withdrawn screwdriver blade inserted tail cone open metal clevis stabilizer unbolted Left An overhead shot rudder deflected left stab has removed reveal Du-Bro metal clevis used connect el evator horn within hollowed-out tail cone Right left spoiler fully raised show spring retainer small control horn Its good idea place name ad dress model case should ever fly away Also AMA Safety Code re quires model identified either name address AMA number S Fuselage Begin box sides trimming joining 1/16 balsa sheet /16 ply over outline wax-paper-covered plan Use ply B2 D proceed aft /16 balsa lightest weight making sure grain running vertically Glue /8 x A-in spruce strips perime ter section Remove wax paper complete right side Fill space between spruce longe rons B2 D %-in Lite Ply shape F2 Using Formula II epoxy Y32 ply pieces PL PR spruce strips parts touch Lite Ply spruce except lower longeron area aft former D cured carefully align tape two sections together drill %-in hole main tube 3146-in holes rear incidence spoiler tubes Separate two sections drill re spective Y6-in aileron cable holes Route out openings screw eyes Drill through Cl D elevator cable tube separate drill rudder cable tube hole D spoiler tube holes Cl Mark inside surface two fuse lage box sides x A-in spruce dou blers leaving gaps B2 Cl stopping D Cut strips glue inside noting bottom strips raised 42 allow later addition box floor Glue B2 Cl D using right trian gles check squareness formers side sides building board satisfied clamp sides gether Epoxy doubler tripler cut x %-in spruce flush top Cl glue x A-in spruce joints aft B2 either side Cl forward D tripling area top Cl will allow surface secure %-in brass tube epoxy brass tubes until satisfied wing aligmuent Wings should easily slip both main rod A2in drill rod tempered Rockwell C-Scale 42-45 incidence setting rod use incidence tube hole neces sary Brush Formula II add medium-weight glass cloth over both tubes contacting respective formers box sides Cut rectangle %2-in ply servo tray aft B2 cutouts servos switch harness rest box floor will formed 3A2-in balsa grain running side side used small piece 3A2-in ply cut out aileron servo aft Cl continued %2-in balsa E Flip box over mark centerline bottom B2 D Glue square strips /6 balsa either side line corresponding A-in thickness keel Trial fit Lite Ply keel servos place eye toward routing wires airborne system Make cutouts now left 3-in gap floor aft ply tray no apparent loss strength battery goes behind former 12 Ab pack recommended Trim keel pack leaving some space foam also After B 1 cut trace duplicate balsa ply use forward canopy tray Also trace one-piece copy former %2-in aircraft ply Make up A-in balsa ply pieces epoxied together right gles secret gentle heating epoxy heat gun flows will spread thinly over sheet Cut out turtledeck formers Tl through T3 A-in balsa T4 cut Lite Ply Notching should done after theyre glued place should already have decided point subject stringernosed sheeted area tar fledeck sheeted Trim formers areas allow sheet planking material Steady box bench slip wings rods checking fit PL PR Use straightedges keep sides square use pins board keep PL PR flush root ribs Bend sides together aft E Cut former E A-in balsa glue after drilling cable tubes Glue T4 F aligning center F points equidistant wing trail ing edges Mount fin platform F2 true fin right triangle Set fin aside epoxy F2 T4 F Stab mount S should epoxied now Line stab up hinge line right angle fuselage centerline tack glue S Drill two holes A-in nylon mounting bolts through balsa block stab S Counter sink balsa allow bolt heads sit flush top stab Lubricating bolts Vaseline put through stab snug up nuts satisfied stabs alignment run bead slow-cure CyA around nut February 1988 35 U author assembles Schweizer beginning two blistering 100 contest days first certainly last SOAR Scale Uprising Photo Dave Haertel Jack Hiner launches model author can concentratIon grabbing lots altitude Using helper launch lathe best way handle Sailpianes size Mike Macintyre plc Designed Ken Willard eamater 4 ON-Board Battery Tester Saves Time. Saves Models Install RC Models Check receiver battery status press button Small Light /2 oz Precise Rugged RX-1ORDER TODAY $1495at dealer Protune Corp 914 462-6452 USAP 0 Box 1808 Poughkeepsie NY 12601 U rims touch underside mount Glue scrap standing tail ends PL PR away gentle bend fit selage sides flush root ribs Glue A-in spruce dowel PL PR ap proximately F Install tubes elevator aile ron servo cables securing form ers epoxy small patch medium-weight glass cloth critical keeping tubes bending pop ping away formers under fight loads What can get away small Gliders woefully inadequate quarterscale models Notch turtledeck formers receive % x A-in spruce longerons Round top edges longerons prior gluing Make up keel epoxy %-in ply inserts receive brass wood screws used mounting skid Glue keel key piece A6-in balsa strips touches B 1 B2 B3 Glue former halves B3 C2 Laminate keel 2 ply either side skid mounting area save weight used 3-in ultralight wheel JoZ Products well liner %2-in balsa wetted slightly allow bend Glue glue %-in triangular balsa gussets brace keel After rounding outer edges glue first two horizontal ply nose formers will simu late tubing B2 after rounding outer edges should able use two pieces -in balsa sheet per side plank between B3 C2 Glue doubler strips balsa keel flush b6ttom B3 C2 planking support same planking will touch PL PR After planldng add rest Lite Ply shapes 3 Glue Bi finish formers Bi Cut canopy trays carefully A-in balsa ply begin work front can opy fitting up balsa ply former prepared match Bi Shape rear bow tray laminating two pieces 46 bass about /16 wide over former Trial fit bow tray after notching two rear corners glue sat isfied rear tray reverse aft shape matching Ti ward shape laminated bass matching front bow Finish trays two coats Formula H epoxy paint flat gray epoxy enamel provides best surface gluing canopy Wil holds RC-56 Plan instrument panel pilota DGA quarter-scale bust what chose because its light weight 1-26 steel tube turnover structure under rear canopy used Sullivans outer sleeves simulate thisdrinking straws would work just well Cover glue joints canopies touch trays bows strips painted plastic simu late aluminum framework rear can opy clear acetate sheet Continued page 129 36 Model Aviation Flies off both land water Crisply die-cut balsa ito ply parts complete hardware eas sembly sensible engineeng Qlear plans p oto illustrated assembly manual 50K229 Complete Catalog $200 ordered direct add Han 16 W 19th St PO Box 511 E7 Higginsville MO N64037 call 816 584-7121 Safety/Preston Continued page 22 ter received Stasi Poulos Dallas TX recently helping newcomer RC fly ing soloed become quite confident ability lost almost fear about flying wind day watched him take off 15 mph steady headwind ascent beautiful could until turned downwind made decision throttle back since plane seemed pick up much speed downwind leg plane banked slightly tried correct bank ailerons horror hollered ailerons werent work ing Yet still throttle elevator control Convinced victim chanical radio failure handed threw transmitter regained control landed tried explain him what happened plane turned downwind its air speed did change its speed over ground did student felt plane passing him too fast solution throt tIe back failed realize did re duce speed plane passed him no real indication planes airspeed reduced airspeed until plane stalled Ailerons change lift aircrafts wings no lift can swing want youll never know difference student said No way plane wasnt moving slow What really saw however stalled plane moving air mass Stasis description incident makes wonder radios have sent off correction failures really didnt occur opinion appreciation visual effect wind models flight characteristics has direct bearing safely fly Have safe month watch out downwind turns Schweizer/Moskal Continued page 36 forward canopy molded piece plastic clamped frame heated oven drawn over wooden plug method has described times other articlesone best being Steve Gray March 1987 issue Model Builder would rather make canopy available ready-made Shabo Scale 2416 North 66th Wauwatosa WI 52213 Plan canopy hold-downsrubberbands mini ature hooks simplest lightest Route pair inner Nyrods PL PR spoiler servo glue Install airborne gear check ac tions correcting binding rubbjng Complete turtledeck structure add crossgrain floor Xe-in balsa E U Glue both halves F3 four A-in balsa lower main stringer standoffs Laminate lower main stringer two pieces A-in-sq spruce Glue stand off formers /6-in floor fuse lage glue stringer running keel G Glue 1/16 angular balsa gussets brace standoffs floor Add piece Y32-sq spruce doubling top longeron Tl tapering aft F Complete two lower stringers running C2 F3 aft F3 keel Form skid two pieces 1A x /2-in spruce laminating form made common nails board Drill skid screw attach points re move cover glass cloth paint match scheme Some 1-26 aircraft fabric fairing cover gap between skid fuselage quite often no fair ing used tail nose cone built up balsa Shape tail cone A-in core Lite Ply hold shape ply core doubled A-in balsa carved correct taper Tack-glue fuselage check maximum travel elevator horn will later glued after painting covering carefully drilled center nose cone after shaping soft balsa %2-in ply disc matches former 4-40 hex head bolt eased piece -in brass tube used bushing created N shape 3A2-in ply would slip behind drilled 4-40 blind mounting nut holds nose cone place bolt tight ened access hole 4-40 bolt serves scale air vent common 1-26 nose cones battery pack way also has advantage being acces sible acts balancing weight STICKY BUSINESS NOW AVAILABLE ON VHS VIDEO ADHESIVEUU Frank Tiano Producer Bob Violett nician ira KEEP YOU OWED TO YOUR SEAT Contains everything want know about Zap Loctite adhesive product informative Humorous 2 hours two intermissions ideal club meetings Produced Frank Tiano Techniques Frank Tiano Bob Viotett NOW AVAILABLE FOR SHOWING $3495 Plus $2 Shipping & Handling Name CityState __________ Zip Send $3695 $3495 plus $2 shipping & handling check money order Frank Tiano Enterprises 2460 SW 85 Terrace Davie FL 33324 Allow 4-6 weeks delivery Sorry cannot deliver post office boxes MA February 1988 129 WORLD CLASS tA Retr *6 Tony Frackowiaks Challenge IV Kit Atlanta KitDash Kit Hattori Headers Pipes AMA&FAIRC Aerobatic Specialties PO Box 388914-248-8603 Lincoindale NY 10540 Send $100 catalog FIBERGLASS PARTS Over 237 cowls kit scratch built models Also over 34 round cowls ranging 4 14-718 diameter 55 duff size & shape wheel pants custom Make Parts Vacuum Form Canopies Pining send $1 unqist kt TAD FIBERILASS SPECIALTIES 30925 nlock Dept 4 Garden city Ml 48135 PHONE 313421-6358 BRAZED & HEAI-TREAIED WIRE GEARS & CABANES PHONE 313 261-9064 experience Great Performance Quartet DALOTEL 850 SPAN 69 ins WING AREA 830 sq ins CHIPMUNK 850 SPAN 70 ins WING AREA 850 sq ins SPAN 76 SPAN 72 ins EXTRA 230 WING AREA 900 sq ins ZLIN 526 WING AREA 900 sq ins 4 ALL BALSA ARFS AT ONE GREAT PRICE HOLIDAY SPECIAL $185 ea available direct select hobby shops c ZIMPRO MARKETING nose cone assembly glassed 2-oz cloth covered coat Formula II epoxy filled Model Magic Filler Now time plan unique details particular subject prior covering youve ever covered rubber-powered model silkspan-and-dope ap proach fuselage same except youll no doubt want use heat-shrink covering did easiest way cover stringered nose cut triangular section oversize starting top keel work downwards section sectionone large piece wont work rest fuselage can done three segments stringered turtledeck first left right sides down centerline Before covering glue inspection fair ing balsa rudder horn provide ac cess linkage needed scale inspection cover balsa circle covered MonoKote tack-glued fair ing after final covering Mount gear including main tail wheel Perfect -in balance model indi cated safe point Install radio fly ing surfaces check action controls rudder should have maxi mum 300 deflection either way ele vator should need /2-in maximum throw up down ailerons should have minimum differential 31that three up down spoilers need maximum throw 450 extremely effective fully open Epoxy fin F F2 after fuselage covered connect linkage glue inspec tion hatch Balancing mean aerodynamic chord MAC calculation see Brad Powers arti cle Model Aviation May 1980 has al ways resulted proper balance Sailplanes Ive calculated 1-26 MAC 12y6 translates 30% MAC measured root rib safe balance point model experience previ ous mid-winged Glider bridle launch very safe rings falls off mid-launch allows maxi mum rotation launch Balance plane prior covering adding weight far READY TO FLY Call 1-800-45-TO FLY *LOW PRICES *EASY TO ASSEMBLE *NO BUILDING *NO PAINTING Piper Cherokee-40$13099 Piper Cherokee-259599 Fokker E111-4010799 Fancy Stick-256599 Cessna 172-208999 engine included Eh SUNSHINE HOBBY 17721 South Western Avenue Gardens California 90247 forward possible minimize all-up weight care selection materi als use glues should result un covered airframe balancing 30% mean aerodynamic chord case prototype Covering marking used Super MonoKote because desire keep things light MonoKote trim sheets large letters Duplicating national signia made easy using Sigs stickon decalsluckily smaller size sheet perfect scale smaller mili tary nomenclature letters no push lift etc vinyl rub-ons After some experimentation found work best rubbed onto small section Mono Kote placed position cov ered wax paper sealed iron low temperature slightly below EconoKote range Youll note red flash running nose tail stock red K&B Superpoxy paint sprayed MonoKote after wiping clean ac etone masking pattern Install steel shoulder hook hardware store root about lage sides Remove hooks harden tapped hole CyA hooks will removable display judging Install main wheel cutting small hole Mono Kote side opposite axle hole Slip brass tube axle securing dab epoxy Now patch MonoKote Make up bridle least l00-lb-test braided nylon choose partner ex perience launching large Sailplanes Have him hold model left hand cupped front left leading edge right hand about T3 fuse first flights launch straight forward after gaining flying speed rotate gently up Radio Technique/Myers Continued page 39 Electronics Inc PO Box 996 Hauppauge NY 11788 telephone 516 265-1325 came neatest things Ive seen years wit Multicore Tip Tinner/Cleaner TTC 1 See photoContinued page 132 -Also Am0NCL Li6B/cHAI 84 fl SPAN VULT BT-13 VALIANT 84 IN SPAN ROLLED PlAN SE-- $20 ELCH FThERGIASS CC7JIS--------- *20 EkCH ADD 12oSHPflfGNYS ADD 8TAZ 130 Model Aviation PO BOX 3076 OAK RIDGE TN 37830 PHONE 61 5482-61 88 AERaTCLL3~/l\ FLYING iA SCAlE SPORT SCAlE AERONCA L3/EFNDEE105 IN 2 CYClE 90-13 II 4 CYClE 12-18 AERO PlANS N PARTS PO BOX 939 OIEAR NY 14760 1 372
Edition: Model Aviation - 1988/02
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 129, 130
acse spo estimatt perfori rining thai nvciled on0-de kit concept era joined at&ircr nd buyeras work rce tri rnng p 31 nice shape 5043-26 collection 01 inc r Pa oulder ho ors wife -26 Just offer mentioned ss rugg 1 RC pen allows rat spa malistic canca three neces model saus F ering eagles pea atten L-R ASK 7 IS 1515 pI1 lanes demi aistIc cr0 demand SingSt 1V57 401-26B Ti used Cobalt dished three-views v start documenting s did owners o d pencil add ur three-view judges understand ncies between di present b variations con Vintage Sailplan eem5 lad Bob # w dollars repairing tl fabric noses us almost e converted ig nose area think o r aspect ratIo design coupled dent ailerons makes tighter radius enhances model ws ability stay weak thermals build 1-26 wide variety markings available mod &Imost gliderport US has Ive found owners fiatthat someone might build miniature ir personal sailplane Finally few Sailplanes offer portability like lave make models fit Plymouth TC-3 custom convertwait Load camera doc tuat full-size 1-26 ruction Start wings tiue described will create correctly set wings later allows fu erly fitted wings original USAF 1-26 posed Al also delivered finished same drami 26 Model Aviation o delivery location ONE QUARTER SCALE ________ 126 B STEVE MOSKAL N 3/32 PLY1/16 BALSA 1/8 BALSA PLANKING RIBS 1/32 PLY TRIPLER3/32 BALSA 1/8 LITE PLY KEEL 1/16 BALSA SHEET 1/8 x 3/8 SPRUCE \1/8 LITE PLY N BLOCK BALSA 1/8 SQ SPRUCE LAM 1/3 BALSA 1/16 BALSA SAILPLANE1/16 BALSA 3/32 BALSA 1/8 50 SPRUCE N 7 N 1/16 BALSA SHEEt N N 1/8 x 1/4 SPRUCE N1/16 CAP STRIP N NNW xx N N N 1/16 WEB 00 Co_________ 0 Co 0 00 ____ 000 ____000r%3 000 _-F2 F-- so07G 00w4 0 -0ro - F yif F2GST4 F3 0i I/B LITE PLY Co _______________________CI 0 0 ro ___________________ ___0 0jCo NI/BLITEPLYKEEL w--BALSA BLOCKSHAPES KREMO VED FOR CLARITY 4-40 SOCKET4-4OBLINONUT HEAD BOLT C0 -BATTERY3/I650BALS /BOD BRASSI/8 BALSA PLANKING I/B PLY INSERT SPRUCE SKI I/BL AM r-LER- BOTH SIDES 82r IA B2CI 0- Dt DOUBLER FROM 3/32PLY C2 B3 B B B3 C 1 0 CI- 0 AILERON SERVO 3/16 50 BALSA 3/32 BALSA GUSSETS W II 3/32 WELL LINER LA JoZ WHEEL has said before countless articles Make up kit prior construction Get labeled model will fall together Ill repeat cost boring parts possible precut Notice 36-in top rear spar allows Left wing halves joined scrap tube note masking tape leading edge inside main tube rear incidence tube cut razor saw Right Epoxy 1As ply doublers Ri R2 Epoxy 1A-in-lD brass tube construction pics author 28 Model Aviation Co Ia C Full-Size Plans Available. Page 170 3/32 PLY1/8 BALSA BOTh SIDES E oII/lB BALSA_____ En T2T3 I/B BALSA ~2 NOTE PERK0___ SECTION C-CFILL WITH BALSA 7 CANOPY BOW I/8LITE PLYI/B BALSA PLY TRAYS - I/B I/4SPRUCE LONGERONS L/B3/B- I/B LITE PLY FILL K3/16BALS1/16 PLY WEB 82 TO 0I/BBALSA BOTH SIDES B I/4SPRUCE 1/BSPRUCEI/B BALSA 3/32 BALSA BOTH SIDES F I/BBALSAI/8oI/4SPRUCE / KANTENNA/I/B 00 WEL KEELANTENNA -I/BBALSA- 1/BSO SPRUCE I/BKEEL CANOPY BOW FORM TURTLEDECK STRINGERS REMOVED FOR CLARITY TT4I/4BAISA 8F2 C I/8LITE PLY I~f!I ___BALSA FILL rI/4BALSA WITH BALSAI/B DOWELSPRUCE LAMDOUBLWJ PERFECT 1/2 / I/B BALSAI/BSO/ WHEEL SAILPLANE NOTE TARER3732MUSIC WIREQUARTER SCALE DESIGNED AND DRAWN BY UCEL8SECTION 0-0DUBROAILERON[Yuii2ALlSi7 SHEET ONE OF TWO OI 4 Y 1177P sheet 75% chord model Finally select medium balsa ribs best contest-grade balsa can find sheeting other parts cant stress enough need build lightits secret success low Left false leading edge %2 balsa glued rib noses bottom leading edge sheeting ready glued place Right top sheeting ailerons leading edge shimmed back 1Ae balsa scraps allow capping aileron leading edge after its cut free February 1988 29 SPAR DETAIL 31/20WICMAKE TWO I/IGPLY _____3/BPINE FILL ENDS3/B BALSA FILL ENDSflA 31/20CUT LINE W2 MAKE TWO I/ILY I1L7A SECTION A-AH_ I/I6PLYBELLcRANK__ CUTOFF HORN III -BRO BALL LINK NOTE TRIMMED AND I BUILT UP AILERON SI-fARE ROM I/B BALSA GUIDE 11/2 TE PRING1/64______ NYRODRETURNPLY SECTION B-B __ TION C-C V7 I/I6BALSATE SHEETV SHAPE TIPBLOCK I/aID TUBEI/8 1/ SPR I/IGPLY- BLERSI/I6CAP STRIP I/16WE I/4 PLYTO R23 BLOCKKI/B W2-BAL SI/BI/ nut RIP2R3R4RSPRTRBR9RIDP11PIP13 }J1iI4P15 iijR1RP17 W I/lW WEB I/J3/B TO R26 SPRUCE I/I BALSA LE SHEET aspect ratio modelthe full-depth 6-in ply websWi and12-in section Butt two root ends Make two 59%-in spruce spar caps andW2 Mark position caps theand mark position refer plans Left Pin down left wing panel sheeting draw lines rib locations Note scrap pieces piy used guides make both halves Ri lean 350 provide scale dihedral Right spars should completed before cutting through brass tubing 30 Model Aviation Full-Size Plans Available. See Page 170 BOTTOM 202 CLOTHE BALSA TE SHEETTOP7/ -I I// __ /// / / --~18~~------ -I _--I / I/I6PLYFACING RIB MAKE TWOTOP 202 CLOTH ENOS]/ -0LET44RJGHT WEB CVERT GRAIN BALSA BLOCK TI SHIM I/BFOR WASHOUT 198 SHEET BAY I/IGPLYBOTTO _____________________________ OUNTTOP CUTOF ARM 0 R19R20R2IR22R23R24R25R26R27R28R2930 IStIEET TWO OF TW9 SA LE PIECE3/32BALSA FALSE LE 3A-in-OD brass tube cut 6% long ling around tube should extend 4 mark line position / x 3A-in spar capped scrap 1A6-in balsa ends root Dont force filler rear edge leading edge sheet Use cyanoacrylate CyA glue spar should slip fit Fill another 4 out Check leading edge sheet cut caps 12-in webs first checking with 3A-in balsa Now coat assembly oversize width allow attachment straightedges vertical alignment well filler spar caps epoxy 12 false leading edge Now draw lines correct taper tip satisfied root set rear rib locations leading edge trailing dihedral angle roughen brass 8-in-ply web butt-glue 4-in verti- edge Cut glue bottom root sheettube wipe acetone thinner tack cal balsa web After cure carefully ing cap strips aileron sheeting marks slow-setting CyA razor-saw through tube butt joint necessary dry finish drawing rib Cut piece %-in pine filler material Pin down leading edge trailing lines over pieces Glue bottom coat slow-setting epoxy prior fil- edge sheeting using straightedge spar cap leading edge sheet recheckLeft T-pins used maintain alignment spars epoxy cures Both W2 pieces epoxied spar Right Spar filler glued around 6/a-ln brass tube Use hardwood first 4 out root %in balsa remainder way out SCHWEIZER 1-268 SAILPLANE AC fltd BreD era c IOESIGNEO AND DRAWN BY ISTEVE IAnCWAJ bruary 1988 31 Left main brass tube tacked Wi ply webs Right An iiiustration gap ieft razor saw between in spar caps finished spar sections can later separated cleanly Note marked outline inside Wi webs used iocate tube spar caps satisfied fit glue ribs Make whatever corrections necessary fit upper cap glue ribs ensure proper alignment leading edge rib halves Ribs Ri through R6 pin straight piece scrap wood noses ribs R7 through next step glue 1-in balsa strips perimeter stab/elevator sheet RiO line up other Glue Ri 3 0 scale dihedral others 900 matching loft angle rib noses R6 Glue 36-in top rear x A-in spruce spar Make shim scrap balsa elevate trailing edge / R3 1 tapering zero thickness R24 Left Glue pre-tapered h-in balsa ribs biock balsa sievator horn mount stabilizer center ribs will filled scrap baisa later Right rudder fin laid up same way stab elevator Spruce spars glued over hinges aligned long piece music wire ilnes marked ribs before Alcohol softens balsa bend around curve 32 Model Aviation stab elevator construction begins Draw lines sheeting act guides pinning down sections balsa Large following full-scales rib locations Klett hinges set next pre-tapered spruce spars glued place ing straightedge right angle Po sition rear half Ri using 3 jig made scrap ply glue spar bottom sheet Continue rear halves R2 through R6 Slip ribs R7 through R3 1 between Left Balsa cores Ae sheeting prepared Note fin spar 1/a x %-in spruce tapered match rudderand its length will allow glued fuselage former F Right Du-Bro ball link plans show aileron ball link bolted piece brass sheet has silver soldered %2 music wire Trim fin spar bottom allow travel arm slip underneath Cut A-in balsa vertical webs fit snugly between ribs R19 R30 trim flush rib top angles Trim hinging system Before its glued trim bottom web between Ribs R22 R23 allow clevis pass through connect trimmed Du-Bro nylon horn Glue two false aileron ribs shaped R22 capture horn Glue aileron ribs Rl9b R3Ob side respective main ribs standing off A2 Add vertical-grain balsa webs spar called plan Glue spoiler in spruce subspar double outside Ribs R13 R18 scrap A-in balsa shaped top curve R12 Roughen aileron pushrod tubes attach points Ri R2 R20 R2 1 epoxy place same fash ion epoxy spoiler tubes Ri R2 R13 R14 R15 Also add A-in ply block inside Ri screw eye mount Carefully trim false leading edge %2-in balsa slightly oversize sanding slight angle bottom edge match rib curve After trimming necessary glue false leading edge bottom point rib noses leaving excess width extending above nose tops Pro tect tops ribs masking tape sand false leading edge down ly working toward angle curve top sheeting Bring bottom leading edge sheet up contact ribs false leading edge glue fast-setting CyA Install half-ribs Rib through R4b Glue top trailing edge sheeting Ri R19 pin down securely Also glue vari ous pieces aileron sheeting tops aileron spar aileron leading edge trailing edge diagonals /16-in balsa simulate diagonal ribs full-scale aileron Slip pre-drilled /6-in-ply aileron bellcrank mount place cable Du-Bro metal clevis connected bellcrank check action eliminate binding CyA mount two ribs Make up short pushrod threaded both ends Du-Bro ball joint connector bellcrank end metal clevis aile ron horn end rods will installed later prior covering Draw lines match rib tops underside leading edge sheet Use thixotropic heavy viscosity epoxy like Hobbypoxy Formula III apply rib tops false leading edgenot top spar cap Apply thin coat epoxy rib line avoiding rear cap contact point Carefully position top leading edge sheeting top cap approximately forward rear edge cap aligned attach rear edge sheet cap fast-setting CyA Gently smooth bend sheeting ward hand paint roller suring proper adhesion epoxy pin tape masking sheeting false leading edge fussy about fit sheeting lays down smoothly old phone books can ensure proper bend pressure Allow over night cure Trim excess balsa leading edge sheeting meets false leading edge sand flush Rough-cut first leading edge piece A-in balsa slightly oversize Glue false leading edge securing place pins dry add final piece leading edge material cut y16-in balsa sheet Add cap strips rib tops R20 through R29 Unpin wing panels board Plane rough-shape leading edges carefully tapering toward tip Sheet area between R30 R3 1 add balsa tip block Note cut block material proper angle prior gluing need sand top tip block get proper curve February 1988 33 Above The robust fuselage provides enormous amount room radio installation Notice routing spoiler line spoiler servo center location aileron/rudder servo allows coordination V-harness electronic manip ulation Large opening Lite Ply floor allows easy access re ceiver antenna tube Right long wire pin used secure elevator stab allows elevator removed Remove aileron cables join panels small piece 42-OD brass tube root ribs flush other Lay section down flat block up other section about mid-panel Roughen 4-in-ID brass tube cut 414 long seal ends scrap balsa clean solvent Separate panels slip tube through ribs six pre-drilled 46-in ply doublers root ribs aligned other pin leading trailing edges match Take time correct holes ribs doublers nec essary get unforced fit Coat dou blers thin layer slow-cure epoxy clamp ribs building small fillet epoxy inside joints After cure cut through tube carefully razor saw before Reposition wings washout shims place pin se curely complete top sheeting cap strips Cut spoiler blades 1-in trian gular trailing edge stock cut piece 4 ply exact dimensions front bottom piece Thinly coat ply epoxy tape bottom blade prevent shifting lay bay Weight assembly light pressure After curing protect sheeting surrounding box masking tape sand blade level sheeting duplicate airfoil curve MonoKote hinging system glue spruce bass strip fill 4-in gap between top leading edge sheet spoiler leading edge Install blade horn small Du-Bro return spring hook up spoiler string checking action binding eliminated Remove panel board cut aileron free sawing through rib carefully avoiding aileron spar Sand aileron leading edge angle 650 sand flush ribs protruding 4-in spar Face aileron A6-in balsa leaving notch born small Du-Bro aileron temporar ily taped place install short pushrod bellcrank Epoxy horn base removed between false ribs Bring aileron neutral position epoxy still uncured clip clevis Pin clamp aileron neutral allow cure Trim facing rib 46 ply match profile sheeted root rib final step glassing roots 2-oz cloth Cover bottom first section cut angle 4 out trailing edge 8 out leading edge top piece should end 8 out trailing edge 12 out lead ing edge used Hobbypoxy Formula II squeegeed out maximum amount resin After cures tape adjacent balsa areas masking tape prevent oversanding lightly sand cloth No second coat needed Fill Model Magic Filler Fill bench rash dings voids Model Magic Filler give wing finish sanding using Tee-Bar similar true-sanding tool Use heavier grit spar ingly complete final sanding 600 grit will give best finish base film covering like MonoKote used Tail surfaces scale outline 34 Model Aviation stab 12% total wing area ever did care flat plate section full-scale aircraft Therefore show 9%-thick diamond airfoil used prototype Cut shape sections /6-in very light balsa sheeting stab elevator outlines pin down Pencil scale rib positions Cut out lightening holes now desired Plane sand 4 x %-in spruce strips correct taper Glue two trailing edge stab leading edge elevator Correct mismatch sanding block Glue 4-in sq balsa strip stock leading trailing edge perimeters halves Use 4x h-in balsa stabilizer tips Glue pre-shaped triangular 4-instock ribs Remove halves relieve 46-in sheet spruce spars large Klett hinges loose pins Finish opposite side previous steps sand fin ished stabilizer shaping rounded lead ing edge sharper trailing edge elevator Install large Klett hinges slow-setting CyA using piece 032 music wire least 25 long keep hinges aligned other Add balsa block filler between lower upper center ribs stabilizer decide stab will removable see fuselage construction text Add A-in balsa pieces top bot tom elevator hinge line Tap elevator horn screws harden holes CyA Join two sections 032 wire round spruce leading edge elevator 1 travel direction Build fin rudder same man ner stabilizer elevator Note fins spruce spars extend down approxi mately 2 below F2 mate former F Add 3/ music wire arm rudder allow actuated inside fuse lage arm bent cut accept Du-Bro aileron ball link rudder must swing 300 deflection either direction former F has notched allow full left throw full throw elevator wire can withdrawn screwdriver blade inserted tail cone open metal clevis stabilizer unbolted Left An overhead shot rudder deflected left stab has removed reveal Du-Bro metal clevis used connect el evator horn within hollowed-out tail cone Right left spoiler fully raised show spring retainer small control horn Its good idea place name ad dress model case should ever fly away Also AMA Safety Code re quires model identified either name address AMA number S Fuselage Begin box sides trimming joining 1/16 balsa sheet /16 ply over outline wax-paper-covered plan Use ply B2 D proceed aft /16 balsa lightest weight making sure grain running vertically Glue /8 x A-in spruce strips perime ter section Remove wax paper complete right side Fill space between spruce longe rons B2 D %-in Lite Ply shape F2 Using Formula II epoxy Y32 ply pieces PL PR spruce strips parts touch Lite Ply spruce except lower longeron area aft former D cured carefully align tape two sections together drill %-in hole main tube 3146-in holes rear incidence spoiler tubes Separate two sections drill re spective Y6-in aileron cable holes Route out openings screw eyes Drill through Cl D elevator cable tube separate drill rudder cable tube hole D spoiler tube holes Cl Mark inside surface two fuse lage box sides x A-in spruce dou blers leaving gaps B2 Cl stopping D Cut strips glue inside noting bottom strips raised 42 allow later addition box floor Glue B2 Cl D using right trian gles check squareness formers side sides building board satisfied clamp sides gether Epoxy doubler tripler cut x %-in spruce flush top Cl glue x A-in spruce joints aft B2 either side Cl forward D tripling area top Cl will allow surface secure %-in brass tube epoxy brass tubes until satisfied wing aligmuent Wings should easily slip both main rod A2in drill rod tempered Rockwell C-Scale 42-45 incidence setting rod use incidence tube hole neces sary Brush Formula II add medium-weight glass cloth over both tubes contacting respective formers box sides Cut rectangle %2-in ply servo tray aft B2 cutouts servos switch harness rest box floor will formed 3A2-in balsa grain running side side used small piece 3A2-in ply cut out aileron servo aft Cl continued %2-in balsa E Flip box over mark centerline bottom B2 D Glue square strips /6 balsa either side line corresponding A-in thickness keel Trial fit Lite Ply keel servos place eye toward routing wires airborne system Make cutouts now left 3-in gap floor aft ply tray no apparent loss strength battery goes behind former 12 Ab pack recommended Trim keel pack leaving some space foam also After B 1 cut trace duplicate balsa ply use forward canopy tray Also trace one-piece copy former %2-in aircraft ply Make up A-in balsa ply pieces epoxied together right gles secret gentle heating epoxy heat gun flows will spread thinly over sheet Cut out turtledeck formers Tl through T3 A-in balsa T4 cut Lite Ply Notching should done after theyre glued place should already have decided point subject stringernosed sheeted area tar fledeck sheeted Trim formers areas allow sheet planking material Steady box bench slip wings rods checking fit PL PR Use straightedges keep sides square use pins board keep PL PR flush root ribs Bend sides together aft E Cut former E A-in balsa glue after drilling cable tubes Glue T4 F aligning center F points equidistant wing trail ing edges Mount fin platform F2 true fin right triangle Set fin aside epoxy F2 T4 F Stab mount S should epoxied now Line stab up hinge line right angle fuselage centerline tack glue S Drill two holes A-in nylon mounting bolts through balsa block stab S Counter sink balsa allow bolt heads sit flush top stab Lubricating bolts Vaseline put through stab snug up nuts satisfied stabs alignment run bead slow-cure CyA around nut February 1988 35 U author assembles Schweizer beginning two blistering 100 contest days first certainly last SOAR Scale Uprising Photo Dave Haertel Jack Hiner launches model author can concentratIon grabbing lots altitude Using helper launch lathe best way handle Sailpianes size Mike Macintyre plc Designed Ken Willard eamater 4 ON-Board Battery Tester Saves Time. Saves Models Install RC Models Check receiver battery status press button Small Light /2 oz Precise Rugged RX-1ORDER TODAY $1495at dealer Protune Corp 914 462-6452 USAP 0 Box 1808 Poughkeepsie NY 12601 U rims touch underside mount Glue scrap standing tail ends PL PR away gentle bend fit selage sides flush root ribs Glue A-in spruce dowel PL PR ap proximately F Install tubes elevator aile ron servo cables securing form ers epoxy small patch medium-weight glass cloth critical keeping tubes bending pop ping away formers under fight loads What can get away small Gliders woefully inadequate quarterscale models Notch turtledeck formers receive % x A-in spruce longerons Round top edges longerons prior gluing Make up keel epoxy %-in ply inserts receive brass wood screws used mounting skid Glue keel key piece A6-in balsa strips touches B 1 B2 B3 Glue former halves B3 C2 Laminate keel 2 ply either side skid mounting area save weight used 3-in ultralight wheel JoZ Products well liner %2-in balsa wetted slightly allow bend Glue glue %-in triangular balsa gussets brace keel After rounding outer edges glue first two horizontal ply nose formers will simu late tubing B2 after rounding outer edges should able use two pieces -in balsa sheet per side plank between B3 C2 Glue doubler strips balsa keel flush b6ttom B3 C2 planking support same planking will touch PL PR After planldng add rest Lite Ply shapes 3 Glue Bi finish formers Bi Cut canopy trays carefully A-in balsa ply begin work front can opy fitting up balsa ply former prepared match Bi Shape rear bow tray laminating two pieces 46 bass about /16 wide over former Trial fit bow tray after notching two rear corners glue sat isfied rear tray reverse aft shape matching Ti ward shape laminated bass matching front bow Finish trays two coats Formula H epoxy paint flat gray epoxy enamel provides best surface gluing canopy Wil holds RC-56 Plan instrument panel pilota DGA quarter-scale bust what chose because its light weight 1-26 steel tube turnover structure under rear canopy used Sullivans outer sleeves simulate thisdrinking straws would work just well Cover glue joints canopies touch trays bows strips painted plastic simu late aluminum framework rear can opy clear acetate sheet Continued page 129 36 Model Aviation Flies off both land water Crisply die-cut balsa ito ply parts complete hardware eas sembly sensible engineeng Qlear plans p oto illustrated assembly manual 50K229 Complete Catalog $200 ordered direct add Han 16 W 19th St PO Box 511 E7 Higginsville MO N64037 call 816 584-7121 Safety/Preston Continued page 22 ter received Stasi Poulos Dallas TX recently helping newcomer RC fly ing soloed become quite confident ability lost almost fear about flying wind day watched him take off 15 mph steady headwind ascent beautiful could until turned downwind made decision throttle back since plane seemed pick up much speed downwind leg plane banked slightly tried correct bank ailerons horror hollered ailerons werent work ing Yet still throttle elevator control Convinced victim chanical radio failure handed threw transmitter regained control landed tried explain him what happened plane turned downwind its air speed did change its speed over ground did student felt plane passing him too fast solution throt tIe back failed realize did re duce speed plane passed him no real indication planes airspeed reduced airspeed until plane stalled Ailerons change lift aircrafts wings no lift can swing want youll never know difference student said No way plane wasnt moving slow What really saw however stalled plane moving air mass Stasis description incident makes wonder radios have sent off correction failures really didnt occur opinion appreciation visual effect wind models flight characteristics has direct bearing safely fly Have safe month watch out downwind turns Schweizer/Moskal Continued page 36 forward canopy molded piece plastic clamped frame heated oven drawn over wooden plug method has described times other articlesone best being Steve Gray March 1987 issue Model Builder would rather make canopy available ready-made Shabo Scale 2416 North 66th Wauwatosa WI 52213 Plan canopy hold-downsrubberbands mini ature hooks simplest lightest Route pair inner Nyrods PL PR spoiler servo glue Install airborne gear check ac tions correcting binding rubbjng Complete turtledeck structure add crossgrain floor Xe-in balsa E U Glue both halves F3 four A-in balsa lower main stringer standoffs Laminate lower main stringer two pieces A-in-sq spruce Glue stand off formers /6-in floor fuse lage glue stringer running keel G Glue 1/16 angular balsa gussets brace standoffs floor Add piece Y32-sq spruce doubling top longeron Tl tapering aft F Complete two lower stringers running C2 F3 aft F3 keel Form skid two pieces 1A x /2-in spruce laminating form made common nails board Drill skid screw attach points re move cover glass cloth paint match scheme Some 1-26 aircraft fabric fairing cover gap between skid fuselage quite often no fair ing used tail nose cone built up balsa Shape tail cone A-in core Lite Ply hold shape ply core doubled A-in balsa carved correct taper Tack-glue fuselage check maximum travel elevator horn will later glued after painting covering carefully drilled center nose cone after shaping soft balsa %2-in ply disc matches former 4-40 hex head bolt eased piece -in brass tube used bushing created N shape 3A2-in ply would slip behind drilled 4-40 blind mounting nut holds nose cone place bolt tight ened access hole 4-40 bolt serves scale air vent common 1-26 nose cones battery pack way also has advantage being acces sible acts balancing weight STICKY BUSINESS NOW AVAILABLE ON VHS VIDEO ADHESIVEUU Frank Tiano Producer Bob Violett nician ira KEEP YOU OWED TO YOUR SEAT Contains everything want know about Zap Loctite adhesive product informative Humorous 2 hours two intermissions ideal club meetings Produced Frank Tiano Techniques Frank Tiano Bob Viotett NOW AVAILABLE FOR SHOWING $3495 Plus $2 Shipping & Handling Name CityState __________ Zip Send $3695 $3495 plus $2 shipping & handling check money order Frank Tiano Enterprises 2460 SW 85 Terrace Davie FL 33324 Allow 4-6 weeks delivery Sorry cannot deliver post office boxes MA February 1988 129 WORLD CLASS tA Retr *6 Tony Frackowiaks Challenge IV Kit Atlanta KitDash Kit Hattori Headers Pipes AMA&FAIRC Aerobatic Specialties PO Box 388914-248-8603 Lincoindale NY 10540 Send $100 catalog FIBERGLASS PARTS Over 237 cowls kit scratch built models Also over 34 round cowls ranging 4 14-718 diameter 55 duff size & shape wheel pants custom Make Parts Vacuum Form Canopies Pining send $1 unqist kt TAD FIBERILASS SPECIALTIES 30925 nlock Dept 4 Garden city Ml 48135 PHONE 313421-6358 BRAZED & HEAI-TREAIED WIRE GEARS & CABANES PHONE 313 261-9064 experience Great Performance Quartet DALOTEL 850 SPAN 69 ins WING AREA 830 sq ins CHIPMUNK 850 SPAN 70 ins WING AREA 850 sq ins SPAN 76 SPAN 72 ins EXTRA 230 WING AREA 900 sq ins ZLIN 526 WING AREA 900 sq ins 4 ALL BALSA ARFS AT ONE GREAT PRICE HOLIDAY SPECIAL $185 ea available direct select hobby shops c ZIMPRO MARKETING nose cone assembly glassed 2-oz cloth covered coat Formula II epoxy filled Model Magic Filler Now time plan unique details particular subject prior covering youve ever covered rubber-powered model silkspan-and-dope ap proach fuselage same except youll no doubt want use heat-shrink covering did easiest way cover stringered nose cut triangular section oversize starting top keel work downwards section sectionone large piece wont work rest fuselage can done three segments stringered turtledeck first left right sides down centerline Before covering glue inspection fair ing balsa rudder horn provide ac cess linkage needed scale inspection cover balsa circle covered MonoKote tack-glued fair ing after final covering Mount gear including main tail wheel Perfect -in balance model indi cated safe point Install radio fly ing surfaces check action controls rudder should have maxi mum 300 deflection either way ele vator should need /2-in maximum throw up down ailerons should have minimum differential 31that three up down spoilers need maximum throw 450 extremely effective fully open Epoxy fin F F2 after fuselage covered connect linkage glue inspec tion hatch Balancing mean aerodynamic chord MAC calculation see Brad Powers arti cle Model Aviation May 1980 has al ways resulted proper balance Sailplanes Ive calculated 1-26 MAC 12y6 translates 30% MAC measured root rib safe balance point model experience previ ous mid-winged Glider bridle launch very safe rings falls off mid-launch allows maxi mum rotation launch Balance plane prior covering adding weight far READY TO FLY Call 1-800-45-TO FLY *LOW PRICES *EASY TO ASSEMBLE *NO BUILDING *NO PAINTING Piper Cherokee-40$13099 Piper Cherokee-259599 Fokker E111-4010799 Fancy Stick-256599 Cessna 172-208999 engine included Eh SUNSHINE HOBBY 17721 South Western Avenue Gardens California 90247 forward possible minimize all-up weight care selection materi als use glues should result un covered airframe balancing 30% mean aerodynamic chord case prototype Covering marking used Super MonoKote because desire keep things light MonoKote trim sheets large letters Duplicating national signia made easy using Sigs stickon decalsluckily smaller size sheet perfect scale smaller mili tary nomenclature letters no push lift etc vinyl rub-ons After some experimentation found work best rubbed onto small section Mono Kote placed position cov ered wax paper sealed iron low temperature slightly below EconoKote range Youll note red flash running nose tail stock red K&B Superpoxy paint sprayed MonoKote after wiping clean ac etone masking pattern Install steel shoulder hook hardware store root about lage sides Remove hooks harden tapped hole CyA hooks will removable display judging Install main wheel cutting small hole Mono Kote side opposite axle hole Slip brass tube axle securing dab epoxy Now patch MonoKote Make up bridle least l00-lb-test braided nylon choose partner ex perience launching large Sailplanes Have him hold model left hand cupped front left leading edge right hand about T3 fuse first flights launch straight forward after gaining flying speed rotate gently up Radio Technique/Myers Continued page 39 Electronics Inc PO Box 996 Hauppauge NY 11788 telephone 516 265-1325 came neatest things Ive seen years wit Multicore Tip Tinner/Cleaner TTC 1 See photoContinued page 132 -Also Am0NCL Li6B/cHAI 84 fl SPAN VULT BT-13 VALIANT 84 IN SPAN ROLLED PlAN SE-- $20 ELCH FThERGIASS CC7JIS--------- *20 EkCH ADD 12oSHPflfGNYS ADD 8TAZ 130 Model Aviation PO BOX 3076 OAK RIDGE TN 37830 PHONE 61 5482-61 88 AERaTCLL3~/l\ FLYING iA SCAlE SPORT SCAlE AERONCA L3/EFNDEE105 IN 2 CYClE 90-13 II 4 CYClE 12-18 AERO PlANS N PARTS PO BOX 939 OIEAR NY 14760 1 372
Edition: Model Aviation - 1988/02
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 129, 130
acse spo estimatt perfori rining thai nvciled on0-de kit concept era joined at&ircr nd buyeras work rce tri rnng p 31 nice shape 5043-26 collection 01 inc r Pa oulder ho ors wife -26 Just offer mentioned ss rugg 1 RC pen allows rat spa malistic canca three neces model saus F ering eagles pea atten L-R ASK 7 IS 1515 pI1 lanes demi aistIc cr0 demand SingSt 1V57 401-26B Ti used Cobalt dished three-views v start documenting s did owners o d pencil add ur three-view judges understand ncies between di present b variations con Vintage Sailplan eem5 lad Bob # w dollars repairing tl fabric noses us almost e converted ig nose area think o r aspect ratIo design coupled dent ailerons makes tighter radius enhances model ws ability stay weak thermals build 1-26 wide variety markings available mod &Imost gliderport US has Ive found owners fiatthat someone might build miniature ir personal sailplane Finally few Sailplanes offer portability like lave make models fit Plymouth TC-3 custom convertwait Load camera doc tuat full-size 1-26 ruction Start wings tiue described will create correctly set wings later allows fu erly fitted wings original USAF 1-26 posed Al also delivered finished same drami 26 Model Aviation o delivery location ONE QUARTER SCALE ________ 126 B STEVE MOSKAL N 3/32 PLY1/16 BALSA 1/8 BALSA PLANKING RIBS 1/32 PLY TRIPLER3/32 BALSA 1/8 LITE PLY KEEL 1/16 BALSA SHEET 1/8 x 3/8 SPRUCE \1/8 LITE PLY N BLOCK BALSA 1/8 SQ SPRUCE LAM 1/3 BALSA 1/16 BALSA SAILPLANE1/16 BALSA 3/32 BALSA 1/8 50 SPRUCE N 7 N 1/16 BALSA SHEEt N N 1/8 x 1/4 SPRUCE N1/16 CAP STRIP N NNW xx N N N 1/16 WEB 00 Co_________ 0 Co 0 00 ____ 000 ____000r%3 000 _-F2 F-- so07G 00w4 0 -0ro - F yif F2GST4 F3 0i I/B LITE PLY Co _______________________CI 0 0 ro ___________________ ___0 0jCo NI/BLITEPLYKEEL w--BALSA BLOCKSHAPES KREMO VED FOR CLARITY 4-40 SOCKET4-4OBLINONUT HEAD BOLT C0 -BATTERY3/I650BALS /BOD BRASSI/8 BALSA PLANKING I/B PLY INSERT SPRUCE SKI I/BL AM r-LER- BOTH SIDES 82r IA B2CI 0- Dt DOUBLER FROM 3/32PLY C2 B3 B B B3 C 1 0 CI- 0 AILERON SERVO 3/16 50 BALSA 3/32 BALSA GUSSETS W II 3/32 WELL LINER LA JoZ WHEEL has said before countless articles Make up kit prior construction Get labeled model will fall together Ill repeat cost boring parts possible precut Notice 36-in top rear spar allows Left wing halves joined scrap tube note masking tape leading edge inside main tube rear incidence tube cut razor saw Right Epoxy 1As ply doublers Ri R2 Epoxy 1A-in-lD brass tube construction pics author 28 Model Aviation Co Ia C Full-Size Plans Available. Page 170 3/32 PLY1/8 BALSA BOTh SIDES E oII/lB BALSA_____ En T2T3 I/B BALSA ~2 NOTE PERK0___ SECTION C-CFILL WITH BALSA 7 CANOPY BOW I/8LITE PLYI/B BALSA PLY TRAYS - I/B I/4SPRUCE LONGERONS L/B3/B- I/B LITE PLY FILL K3/16BALS1/16 PLY WEB 82 TO 0I/BBALSA BOTH SIDES B I/4SPRUCE 1/BSPRUCEI/B BALSA 3/32 BALSA BOTH SIDES F I/BBALSAI/8oI/4SPRUCE / KANTENNA/I/B 00 WEL KEELANTENNA -I/BBALSA- 1/BSO SPRUCE I/BKEEL CANOPY BOW FORM TURTLEDECK STRINGERS REMOVED FOR CLARITY TT4I/4BAISA 8F2 C I/8LITE PLY I~f!I ___BALSA FILL rI/4BALSA WITH BALSAI/B DOWELSPRUCE LAMDOUBLWJ PERFECT 1/2 / I/B BALSAI/BSO/ WHEEL SAILPLANE NOTE TARER3732MUSIC WIREQUARTER SCALE DESIGNED AND DRAWN BY UCEL8SECTION 0-0DUBROAILERON[Yuii2ALlSi7 SHEET ONE OF TWO OI 4 Y 1177P sheet 75% chord model Finally select medium balsa ribs best contest-grade balsa can find sheeting other parts cant stress enough need build lightits secret success low Left false leading edge %2 balsa glued rib noses bottom leading edge sheeting ready glued place Right top sheeting ailerons leading edge shimmed back 1Ae balsa scraps allow capping aileron leading edge after its cut free February 1988 29 SPAR DETAIL 31/20WICMAKE TWO I/IGPLY _____3/BPINE FILL ENDS3/B BALSA FILL ENDSflA 31/20CUT LINE W2 MAKE TWO I/ILY I1L7A SECTION A-AH_ I/I6PLYBELLcRANK__ CUTOFF HORN III -BRO BALL LINK NOTE TRIMMED AND I BUILT UP AILERON SI-fARE ROM I/B BALSA GUIDE 11/2 TE PRING1/64______ NYRODRETURNPLY SECTION B-B __ TION C-C V7 I/I6BALSATE SHEETV SHAPE TIPBLOCK I/aID TUBEI/8 1/ SPR I/IGPLY- BLERSI/I6CAP STRIP I/16WE I/4 PLYTO R23 BLOCKKI/B W2-BAL SI/BI/ nut RIP2R3R4RSPRTRBR9RIDP11PIP13 }J1iI4P15 iijR1RP17 W I/lW WEB I/J3/B TO R26 SPRUCE I/I BALSA LE SHEET aspect ratio modelthe full-depth 6-in ply websWi and12-in section Butt two root ends Make two 59%-in spruce spar caps andW2 Mark position caps theand mark position refer plans Left Pin down left wing panel sheeting draw lines rib locations Note scrap pieces piy used guides make both halves Ri lean 350 provide scale dihedral Right spars should completed before cutting through brass tubing 30 Model Aviation Full-Size Plans Available. See Page 170 BOTTOM 202 CLOTHE BALSA TE SHEETTOP7/ -I I// __ /// / / --~18~~------ -I _--I / I/I6PLYFACING RIB MAKE TWOTOP 202 CLOTH ENOS]/ -0LET44RJGHT WEB CVERT GRAIN BALSA BLOCK TI SHIM I/BFOR WASHOUT 198 SHEET BAY I/IGPLYBOTTO _____________________________ OUNTTOP CUTOF ARM 0 R19R20R2IR22R23R24R25R26R27R28R2930 IStIEET TWO OF TW9 SA LE PIECE3/32BALSA FALSE LE 3A-in-OD brass tube cut 6% long ling around tube should extend 4 mark line position / x 3A-in spar capped scrap 1A6-in balsa ends root Dont force filler rear edge leading edge sheet Use cyanoacrylate CyA glue spar should slip fit Fill another 4 out Check leading edge sheet cut caps 12-in webs first checking with 3A-in balsa Now coat assembly oversize width allow attachment straightedges vertical alignment well filler spar caps epoxy 12 false leading edge Now draw lines correct taper tip satisfied root set rear rib locations leading edge trailing dihedral angle roughen brass 8-in-ply web butt-glue 4-in verti- edge Cut glue bottom root sheettube wipe acetone thinner tack cal balsa web After cure carefully ing cap strips aileron sheeting marks slow-setting CyA razor-saw through tube butt joint necessary dry finish drawing rib Cut piece %-in pine filler material Pin down leading edge trailing lines over pieces Glue bottom coat slow-setting epoxy prior fil- edge sheeting using straightedge spar cap leading edge sheet recheckLeft T-pins used maintain alignment spars epoxy cures Both W2 pieces epoxied spar Right Spar filler glued around 6/a-ln brass tube Use hardwood first 4 out root %in balsa remainder way out SCHWEIZER 1-268 SAILPLANE AC fltd BreD era c IOESIGNEO AND DRAWN BY ISTEVE IAnCWAJ bruary 1988 31 Left main brass tube tacked Wi ply webs Right An iiiustration gap ieft razor saw between in spar caps finished spar sections can later separated cleanly Note marked outline inside Wi webs used iocate tube spar caps satisfied fit glue ribs Make whatever corrections necessary fit upper cap glue ribs ensure proper alignment leading edge rib halves Ribs Ri through R6 pin straight piece scrap wood noses ribs R7 through next step glue 1-in balsa strips perimeter stab/elevator sheet RiO line up other Glue Ri 3 0 scale dihedral others 900 matching loft angle rib noses R6 Glue 36-in top rear x A-in spruce spar Make shim scrap balsa elevate trailing edge / R3 1 tapering zero thickness R24 Left Glue pre-tapered h-in balsa ribs biock balsa sievator horn mount stabilizer center ribs will filled scrap baisa later Right rudder fin laid up same way stab elevator Spruce spars glued over hinges aligned long piece music wire ilnes marked ribs before Alcohol softens balsa bend around curve 32 Model Aviation stab elevator construction begins Draw lines sheeting act guides pinning down sections balsa Large following full-scales rib locations Klett hinges set next pre-tapered spruce spars glued place ing straightedge right angle Po sition rear half Ri using 3 jig made scrap ply glue spar bottom sheet Continue rear halves R2 through R6 Slip ribs R7 through R3 1 between Left Balsa cores Ae sheeting prepared Note fin spar 1/a x %-in spruce tapered match rudderand its length will allow glued fuselage former F Right Du-Bro ball link plans show aileron ball link bolted piece brass sheet has silver soldered %2 music wire Trim fin spar bottom allow travel arm slip underneath Cut A-in balsa vertical webs fit snugly between ribs R19 R30 trim flush rib top angles Trim hinging system Before its glued trim bottom web between Ribs R22 R23 allow clevis pass through connect trimmed Du-Bro nylon horn Glue two false aileron ribs shaped R22 capture horn Glue aileron ribs Rl9b R3Ob side respective main ribs standing off A2 Add vertical-grain balsa webs spar called plan Glue spoiler in spruce subspar double outside Ribs R13 R18 scrap A-in balsa shaped top curve R12 Roughen aileron pushrod tubes attach points Ri R2 R20 R2 1 epoxy place same fash ion epoxy spoiler tubes Ri R2 R13 R14 R15 Also add A-in ply block inside Ri screw eye mount Carefully trim false leading edge %2-in balsa slightly oversize sanding slight angle bottom edge match rib curve After trimming necessary glue false leading edge bottom point rib noses leaving excess width extending above nose tops Pro tect tops ribs masking tape sand false leading edge down ly working toward angle curve top sheeting Bring bottom leading edge sheet up contact ribs false leading edge glue fast-setting CyA Install half-ribs Rib through R4b Glue top trailing edge sheeting Ri R19 pin down securely Also glue vari ous pieces aileron sheeting tops aileron spar aileron leading edge trailing edge diagonals /16-in balsa simulate diagonal ribs full-scale aileron Slip pre-drilled /6-in-ply aileron bellcrank mount place cable Du-Bro metal clevis connected bellcrank check action eliminate binding CyA mount two ribs Make up short pushrod threaded both ends Du-Bro ball joint connector bellcrank end metal clevis aile ron horn end rods will installed later prior covering Draw lines match rib tops underside leading edge sheet Use thixotropic heavy viscosity epoxy like Hobbypoxy Formula III apply rib tops false leading edgenot top spar cap Apply thin coat epoxy rib line avoiding rear cap contact point Carefully position top leading edge sheeting top cap approximately forward rear edge cap aligned attach rear edge sheet cap fast-setting CyA Gently smooth bend sheeting ward hand paint roller suring proper adhesion epoxy pin tape masking sheeting false leading edge fussy about fit sheeting lays down smoothly old phone books can ensure proper bend pressure Allow over night cure Trim excess balsa leading edge sheeting meets false leading edge sand flush Rough-cut first leading edge piece A-in balsa slightly oversize Glue false leading edge securing place pins dry add final piece leading edge material cut y16-in balsa sheet Add cap strips rib tops R20 through R29 Unpin wing panels board Plane rough-shape leading edges carefully tapering toward tip Sheet area between R30 R3 1 add balsa tip block Note cut block material proper angle prior gluing need sand top tip block get proper curve February 1988 33 Above The robust fuselage provides enormous amount room radio installation Notice routing spoiler line spoiler servo center location aileron/rudder servo allows coordination V-harness electronic manip ulation Large opening Lite Ply floor allows easy access re ceiver antenna tube Right long wire pin used secure elevator stab allows elevator removed Remove aileron cables join panels small piece 42-OD brass tube root ribs flush other Lay section down flat block up other section about mid-panel Roughen 4-in-ID brass tube cut 414 long seal ends scrap balsa clean solvent Separate panels slip tube through ribs six pre-drilled 46-in ply doublers root ribs aligned other pin leading trailing edges match Take time correct holes ribs doublers nec essary get unforced fit Coat dou blers thin layer slow-cure epoxy clamp ribs building small fillet epoxy inside joints After cure cut through tube carefully razor saw before Reposition wings washout shims place pin se curely complete top sheeting cap strips Cut spoiler blades 1-in trian gular trailing edge stock cut piece 4 ply exact dimensions front bottom piece Thinly coat ply epoxy tape bottom blade prevent shifting lay bay Weight assembly light pressure After curing protect sheeting surrounding box masking tape sand blade level sheeting duplicate airfoil curve MonoKote hinging system glue spruce bass strip fill 4-in gap between top leading edge sheet spoiler leading edge Install blade horn small Du-Bro return spring hook up spoiler string checking action binding eliminated Remove panel board cut aileron free sawing through rib carefully avoiding aileron spar Sand aileron leading edge angle 650 sand flush ribs protruding 4-in spar Face aileron A6-in balsa leaving notch born small Du-Bro aileron temporar ily taped place install short pushrod bellcrank Epoxy horn base removed between false ribs Bring aileron neutral position epoxy still uncured clip clevis Pin clamp aileron neutral allow cure Trim facing rib 46 ply match profile sheeted root rib final step glassing roots 2-oz cloth Cover bottom first section cut angle 4 out trailing edge 8 out leading edge top piece should end 8 out trailing edge 12 out lead ing edge used Hobbypoxy Formula II squeegeed out maximum amount resin After cures tape adjacent balsa areas masking tape prevent oversanding lightly sand cloth No second coat needed Fill Model Magic Filler Fill bench rash dings voids Model Magic Filler give wing finish sanding using Tee-Bar similar true-sanding tool Use heavier grit spar ingly complete final sanding 600 grit will give best finish base film covering like MonoKote used Tail surfaces scale outline 34 Model Aviation stab 12% total wing area ever did care flat plate section full-scale aircraft Therefore show 9%-thick diamond airfoil used prototype Cut shape sections /6-in very light balsa sheeting stab elevator outlines pin down Pencil scale rib positions Cut out lightening holes now desired Plane sand 4 x %-in spruce strips correct taper Glue two trailing edge stab leading edge elevator Correct mismatch sanding block Glue 4-in sq balsa strip stock leading trailing edge perimeters halves Use 4x h-in balsa stabilizer tips Glue pre-shaped triangular 4-instock ribs Remove halves relieve 46-in sheet spruce spars large Klett hinges loose pins Finish opposite side previous steps sand fin ished stabilizer shaping rounded lead ing edge sharper trailing edge elevator Install large Klett hinges slow-setting CyA using piece 032 music wire least 25 long keep hinges aligned other Add balsa block filler between lower upper center ribs stabilizer decide stab will removable see fuselage construction text Add A-in balsa pieces top bot tom elevator hinge line Tap elevator horn screws harden holes CyA Join two sections 032 wire round spruce leading edge elevator 1 travel direction Build fin rudder same man ner stabilizer elevator Note fins spruce spars extend down approxi mately 2 below F2 mate former F Add 3/ music wire arm rudder allow actuated inside fuse lage arm bent cut accept Du-Bro aileron ball link rudder must swing 300 deflection either direction former F has notched allow full left throw full throw elevator wire can withdrawn screwdriver blade inserted tail cone open metal clevis stabilizer unbolted Left An overhead shot rudder deflected left stab has removed reveal Du-Bro metal clevis used connect el evator horn within hollowed-out tail cone Right left spoiler fully raised show spring retainer small control horn Its good idea place name ad dress model case should ever fly away Also AMA Safety Code re quires model identified either name address AMA number S Fuselage Begin box sides trimming joining 1/16 balsa sheet /16 ply over outline wax-paper-covered plan Use ply B2 D proceed aft /16 balsa lightest weight making sure grain running vertically Glue /8 x A-in spruce strips perime ter section Remove wax paper complete right side Fill space between spruce longe rons B2 D %-in Lite Ply shape F2 Using Formula II epoxy Y32 ply pieces PL PR spruce strips parts touch Lite Ply spruce except lower longeron area aft former D cured carefully align tape two sections together drill %-in hole main tube 3146-in holes rear incidence spoiler tubes Separate two sections drill re spective Y6-in aileron cable holes Route out openings screw eyes Drill through Cl D elevator cable tube separate drill rudder cable tube hole D spoiler tube holes Cl Mark inside surface two fuse lage box sides x A-in spruce dou blers leaving gaps B2 Cl stopping D Cut strips glue inside noting bottom strips raised 42 allow later addition box floor Glue B2 Cl D using right trian gles check squareness formers side sides building board satisfied clamp sides gether Epoxy doubler tripler cut x %-in spruce flush top Cl glue x A-in spruce joints aft B2 either side Cl forward D tripling area top Cl will allow surface secure %-in brass tube epoxy brass tubes until satisfied wing aligmuent Wings should easily slip both main rod A2in drill rod tempered Rockwell C-Scale 42-45 incidence setting rod use incidence tube hole neces sary Brush Formula II add medium-weight glass cloth over both tubes contacting respective formers box sides Cut rectangle %2-in ply servo tray aft B2 cutouts servos switch harness rest box floor will formed 3A2-in balsa grain running side side used small piece 3A2-in ply cut out aileron servo aft Cl continued %2-in balsa E Flip box over mark centerline bottom B2 D Glue square strips /6 balsa either side line corresponding A-in thickness keel Trial fit Lite Ply keel servos place eye toward routing wires airborne system Make cutouts now left 3-in gap floor aft ply tray no apparent loss strength battery goes behind former 12 Ab pack recommended Trim keel pack leaving some space foam also After B 1 cut trace duplicate balsa ply use forward canopy tray Also trace one-piece copy former %2-in aircraft ply Make up A-in balsa ply pieces epoxied together right gles secret gentle heating epoxy heat gun flows will spread thinly over sheet Cut out turtledeck formers Tl through T3 A-in balsa T4 cut Lite Ply Notching should done after theyre glued place should already have decided point subject stringernosed sheeted area tar fledeck sheeted Trim formers areas allow sheet planking material Steady box bench slip wings rods checking fit PL PR Use straightedges keep sides square use pins board keep PL PR flush root ribs Bend sides together aft E Cut former E A-in balsa glue after drilling cable tubes Glue T4 F aligning center F points equidistant wing trail ing edges Mount fin platform F2 true fin right triangle Set fin aside epoxy F2 T4 F Stab mount S should epoxied now Line stab up hinge line right angle fuselage centerline tack glue S Drill two holes A-in nylon mounting bolts through balsa block stab S Counter sink balsa allow bolt heads sit flush top stab Lubricating bolts Vaseline put through stab snug up nuts satisfied stabs alignment run bead slow-cure CyA around nut February 1988 35 U author assembles Schweizer beginning two blistering 100 contest days first certainly last SOAR Scale Uprising Photo Dave Haertel Jack Hiner launches model author can concentratIon grabbing lots altitude Using helper launch lathe best way handle Sailpianes size Mike Macintyre plc Designed Ken Willard eamater 4 ON-Board Battery Tester Saves Time. Saves Models Install RC Models Check receiver battery status press button Small Light /2 oz Precise Rugged RX-1ORDER TODAY $1495at dealer Protune Corp 914 462-6452 USAP 0 Box 1808 Poughkeepsie NY 12601 U rims touch underside mount Glue scrap standing tail ends PL PR away gentle bend fit selage sides flush root ribs Glue A-in spruce dowel PL PR ap proximately F Install tubes elevator aile ron servo cables securing form ers epoxy small patch medium-weight glass cloth critical keeping tubes bending pop ping away formers under fight loads What can get away small Gliders woefully inadequate quarterscale models Notch turtledeck formers receive % x A-in spruce longerons Round top edges longerons prior gluing Make up keel epoxy %-in ply inserts receive brass wood screws used mounting skid Glue keel key piece A6-in balsa strips touches B 1 B2 B3 Glue former halves B3 C2 Laminate keel 2 ply either side skid mounting area save weight used 3-in ultralight wheel JoZ Products well liner %2-in balsa wetted slightly allow bend Glue glue %-in triangular balsa gussets brace keel After rounding outer edges glue first two horizontal ply nose formers will simu late tubing B2 after rounding outer edges should able use two pieces -in balsa sheet per side plank between B3 C2 Glue doubler strips balsa keel flush b6ttom B3 C2 planking support same planking will touch PL PR After planldng add rest Lite Ply shapes 3 Glue Bi finish formers Bi Cut canopy trays carefully A-in balsa ply begin work front can opy fitting up balsa ply former prepared match Bi Shape rear bow tray laminating two pieces 46 bass about /16 wide over former Trial fit bow tray after notching two rear corners glue sat isfied rear tray reverse aft shape matching Ti ward shape laminated bass matching front bow Finish trays two coats Formula H epoxy paint flat gray epoxy enamel provides best surface gluing canopy Wil holds RC-56 Plan instrument panel pilota DGA quarter-scale bust what chose because its light weight 1-26 steel tube turnover structure under rear canopy used Sullivans outer sleeves simulate thisdrinking straws would work just well Cover glue joints canopies touch trays bows strips painted plastic simu late aluminum framework rear can opy clear acetate sheet Continued page 129 36 Model Aviation Flies off both land water Crisply die-cut balsa ito ply parts complete hardware eas sembly sensible engineeng Qlear plans p oto illustrated assembly manual 50K229 Complete Catalog $200 ordered direct add Han 16 W 19th St PO Box 511 E7 Higginsville MO N64037 call 816 584-7121 Safety/Preston Continued page 22 ter received Stasi Poulos Dallas TX recently helping newcomer RC fly ing soloed become quite confident ability lost almost fear about flying wind day watched him take off 15 mph steady headwind ascent beautiful could until turned downwind made decision throttle back since plane seemed pick up much speed downwind leg plane banked slightly tried correct bank ailerons horror hollered ailerons werent work ing Yet still throttle elevator control Convinced victim chanical radio failure handed threw transmitter regained control landed tried explain him what happened plane turned downwind its air speed did change its speed over ground did student felt plane passing him too fast solution throt tIe back failed realize did re duce speed plane passed him no real indication planes airspeed reduced airspeed until plane stalled Ailerons change lift aircrafts wings no lift can swing want youll never know difference student said No way plane wasnt moving slow What really saw however stalled plane moving air mass Stasis description incident makes wonder radios have sent off correction failures really didnt occur opinion appreciation visual effect wind models flight characteristics has direct bearing safely fly Have safe month watch out downwind turns Schweizer/Moskal Continued page 36 forward canopy molded piece plastic clamped frame heated oven drawn over wooden plug method has described times other articlesone best being Steve Gray March 1987 issue Model Builder would rather make canopy available ready-made Shabo Scale 2416 North 66th Wauwatosa WI 52213 Plan canopy hold-downsrubberbands mini ature hooks simplest lightest Route pair inner Nyrods PL PR spoiler servo glue Install airborne gear check ac tions correcting binding rubbjng Complete turtledeck structure add crossgrain floor Xe-in balsa E U Glue both halves F3 four A-in balsa lower main stringer standoffs Laminate lower main stringer two pieces A-in-sq spruce Glue stand off formers /6-in floor fuse lage glue stringer running keel G Glue 1/16 angular balsa gussets brace standoffs floor Add piece Y32-sq spruce doubling top longeron Tl tapering aft F Complete two lower stringers running C2 F3 aft F3 keel Form skid two pieces 1A x /2-in spruce laminating form made common nails board Drill skid screw attach points re move cover glass cloth paint match scheme Some 1-26 aircraft fabric fairing cover gap between skid fuselage quite often no fair ing used tail nose cone built up balsa Shape tail cone A-in core Lite Ply hold shape ply core doubled A-in balsa carved correct taper Tack-glue fuselage check maximum travel elevator horn will later glued after painting covering carefully drilled center nose cone after shaping soft balsa %2-in ply disc matches former 4-40 hex head bolt eased piece -in brass tube used bushing created N shape 3A2-in ply would slip behind drilled 4-40 blind mounting nut holds nose cone place bolt tight ened access hole 4-40 bolt serves scale air vent common 1-26 nose cones battery pack way also has advantage being acces sible acts balancing weight STICKY BUSINESS NOW AVAILABLE ON VHS VIDEO ADHESIVEUU Frank Tiano Producer Bob Violett nician ira KEEP YOU OWED TO YOUR SEAT Contains everything want know about Zap Loctite adhesive product informative Humorous 2 hours two intermissions ideal club meetings Produced Frank Tiano Techniques Frank Tiano Bob Viotett NOW AVAILABLE FOR SHOWING $3495 Plus $2 Shipping & Handling Name CityState __________ Zip Send $3695 $3495 plus $2 shipping & handling check money order Frank Tiano Enterprises 2460 SW 85 Terrace Davie FL 33324 Allow 4-6 weeks delivery Sorry cannot deliver post office boxes MA February 1988 129 WORLD CLASS tA Retr *6 Tony Frackowiaks Challenge IV Kit Atlanta KitDash Kit Hattori Headers Pipes AMA&FAIRC Aerobatic Specialties PO Box 388914-248-8603 Lincoindale NY 10540 Send $100 catalog FIBERGLASS PARTS Over 237 cowls kit scratch built models Also over 34 round cowls ranging 4 14-718 diameter 55 duff size & shape wheel pants custom Make Parts Vacuum Form Canopies Pining send $1 unqist kt TAD FIBERILASS SPECIALTIES 30925 nlock Dept 4 Garden city Ml 48135 PHONE 313421-6358 BRAZED & HEAI-TREAIED WIRE GEARS & CABANES PHONE 313 261-9064 experience Great Performance Quartet DALOTEL 850 SPAN 69 ins WING AREA 830 sq ins CHIPMUNK 850 SPAN 70 ins WING AREA 850 sq ins SPAN 76 SPAN 72 ins EXTRA 230 WING AREA 900 sq ins ZLIN 526 WING AREA 900 sq ins 4 ALL BALSA ARFS AT ONE GREAT PRICE HOLIDAY SPECIAL $185 ea available direct select hobby shops c ZIMPRO MARKETING nose cone assembly glassed 2-oz cloth covered coat Formula II epoxy filled Model Magic Filler Now time plan unique details particular subject prior covering youve ever covered rubber-powered model silkspan-and-dope ap proach fuselage same except youll no doubt want use heat-shrink covering did easiest way cover stringered nose cut triangular section oversize starting top keel work downwards section sectionone large piece wont work rest fuselage can done three segments stringered turtledeck first left right sides down centerline Before covering glue inspection fair ing balsa rudder horn provide ac cess linkage needed scale inspection cover balsa circle covered MonoKote tack-glued fair ing after final covering Mount gear including main tail wheel Perfect -in balance model indi cated safe point Install radio fly ing surfaces check action controls rudder should have maxi mum 300 deflection either way ele vator should need /2-in maximum throw up down ailerons should have minimum differential 31that three up down spoilers need maximum throw 450 extremely effective fully open Epoxy fin F F2 after fuselage covered connect linkage glue inspec tion hatch Balancing mean aerodynamic chord MAC calculation see Brad Powers arti cle Model Aviation May 1980 has al ways resulted proper balance Sailplanes Ive calculated 1-26 MAC 12y6 translates 30% MAC measured root rib safe balance point model experience previ ous mid-winged Glider bridle launch very safe rings falls off mid-launch allows maxi mum rotation launch Balance plane prior covering adding weight far READY TO FLY Call 1-800-45-TO FLY *LOW PRICES *EASY TO ASSEMBLE *NO BUILDING *NO PAINTING Piper Cherokee-40$13099 Piper Cherokee-259599 Fokker E111-4010799 Fancy Stick-256599 Cessna 172-208999 engine included Eh SUNSHINE HOBBY 17721 South Western Avenue Gardens California 90247 forward possible minimize all-up weight care selection materi als use glues should result un covered airframe balancing 30% mean aerodynamic chord case prototype Covering marking used Super MonoKote because desire keep things light MonoKote trim sheets large letters Duplicating national signia made easy using Sigs stickon decalsluckily smaller size sheet perfect scale smaller mili tary nomenclature letters no push lift etc vinyl rub-ons After some experimentation found work best rubbed onto small section Mono Kote placed position cov ered wax paper sealed iron low temperature slightly below EconoKote range Youll note red flash running nose tail stock red K&B Superpoxy paint sprayed MonoKote after wiping clean ac etone masking pattern Install steel shoulder hook hardware store root about lage sides Remove hooks harden tapped hole CyA hooks will removable display judging Install main wheel cutting small hole Mono Kote side opposite axle hole Slip brass tube axle securing dab epoxy Now patch MonoKote Make up bridle least l00-lb-test braided nylon choose partner ex perience launching large Sailplanes Have him hold model left hand cupped front left leading edge right hand about T3 fuse first flights launch straight forward after gaining flying speed rotate gently up Radio Technique/Myers Continued page 39 Electronics Inc PO Box 996 Hauppauge NY 11788 telephone 516 265-1325 came neatest things Ive seen years wit Multicore Tip Tinner/Cleaner TTC 1 See photoContinued page 132 -Also Am0NCL Li6B/cHAI 84 fl SPAN VULT BT-13 VALIANT 84 IN SPAN ROLLED PlAN SE-- $20 ELCH FThERGIASS CC7JIS--------- *20 EkCH ADD 12oSHPflfGNYS ADD 8TAZ 130 Model Aviation PO BOX 3076 OAK RIDGE TN 37830 PHONE 61 5482-61 88 AERaTCLL3~/l\ FLYING iA SCAlE SPORT SCAlE AERONCA L3/EFNDEE105 IN 2 CYClE 90-13 II 4 CYClE 12-18 AERO PlANS N PARTS PO BOX 939 OIEAR NY 14760 1 372
Edition: Model Aviation - 1988/02
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 129, 130
acse spo estimatt perfori rining thai nvciled on0-de kit concept era joined at&ircr nd buyeras work rce tri rnng p 31 nice shape 5043-26 collection 01 inc r Pa oulder ho ors wife -26 Just offer mentioned ss rugg 1 RC pen allows rat spa malistic canca three neces model saus F ering eagles pea atten L-R ASK 7 IS 1515 pI1 lanes demi aistIc cr0 demand SingSt 1V57 401-26B Ti used Cobalt dished three-views v start documenting s did owners o d pencil add ur three-view judges understand ncies between di present b variations con Vintage Sailplan eem5 lad Bob # w dollars repairing tl fabric noses us almost e converted ig nose area think o r aspect ratIo design coupled dent ailerons makes tighter radius enhances model ws ability stay weak thermals build 1-26 wide variety markings available mod &Imost gliderport US has Ive found owners fiatthat someone might build miniature ir personal sailplane Finally few Sailplanes offer portability like lave make models fit Plymouth TC-3 custom convertwait Load camera doc tuat full-size 1-26 ruction Start wings tiue described will create correctly set wings later allows fu erly fitted wings original USAF 1-26 posed Al also delivered finished same drami 26 Model Aviation o delivery location ONE QUARTER SCALE ________ 126 B STEVE MOSKAL N 3/32 PLY1/16 BALSA 1/8 BALSA PLANKING RIBS 1/32 PLY TRIPLER3/32 BALSA 1/8 LITE PLY KEEL 1/16 BALSA SHEET 1/8 x 3/8 SPRUCE \1/8 LITE PLY N BLOCK BALSA 1/8 SQ SPRUCE LAM 1/3 BALSA 1/16 BALSA SAILPLANE1/16 BALSA 3/32 BALSA 1/8 50 SPRUCE N 7 N 1/16 BALSA SHEEt N N 1/8 x 1/4 SPRUCE N1/16 CAP STRIP N NNW xx N N N 1/16 WEB 00 Co_________ 0 Co 0 00 ____ 000 ____000r%3 000 _-F2 F-- so07G 00w4 0 -0ro - F yif F2GST4 F3 0i I/B LITE PLY Co _______________________CI 0 0 ro ___________________ ___0 0jCo NI/BLITEPLYKEEL w--BALSA BLOCKSHAPES KREMO VED FOR CLARITY 4-40 SOCKET4-4OBLINONUT HEAD BOLT C0 -BATTERY3/I650BALS /BOD BRASSI/8 BALSA PLANKING I/B PLY INSERT SPRUCE SKI I/BL AM r-LER- BOTH SIDES 82r IA B2CI 0- Dt DOUBLER FROM 3/32PLY C2 B3 B B B3 C 1 0 CI- 0 AILERON SERVO 3/16 50 BALSA 3/32 BALSA GUSSETS W II 3/32 WELL LINER LA JoZ WHEEL has said before countless articles Make up kit prior construction Get labeled model will fall together Ill repeat cost boring parts possible precut Notice 36-in top rear spar allows Left wing halves joined scrap tube note masking tape leading edge inside main tube rear incidence tube cut razor saw Right Epoxy 1As ply doublers Ri R2 Epoxy 1A-in-lD brass tube construction pics author 28 Model Aviation Co Ia C Full-Size Plans Available. Page 170 3/32 PLY1/8 BALSA BOTh SIDES E oII/lB BALSA_____ En T2T3 I/B BALSA ~2 NOTE PERK0___ SECTION C-CFILL WITH BALSA 7 CANOPY BOW I/8LITE PLYI/B BALSA PLY TRAYS - I/B I/4SPRUCE LONGERONS L/B3/B- I/B LITE PLY FILL K3/16BALS1/16 PLY WEB 82 TO 0I/BBALSA BOTH SIDES B I/4SPRUCE 1/BSPRUCEI/B BALSA 3/32 BALSA BOTH SIDES F I/BBALSAI/8oI/4SPRUCE / KANTENNA/I/B 00 WEL KEELANTENNA -I/BBALSA- 1/BSO SPRUCE I/BKEEL CANOPY BOW FORM TURTLEDECK STRINGERS REMOVED FOR CLARITY TT4I/4BAISA 8F2 C I/8LITE PLY I~f!I ___BALSA FILL rI/4BALSA WITH BALSAI/B DOWELSPRUCE LAMDOUBLWJ PERFECT 1/2 / I/B BALSAI/BSO/ WHEEL SAILPLANE NOTE TARER3732MUSIC WIREQUARTER SCALE DESIGNED AND DRAWN BY UCEL8SECTION 0-0DUBROAILERON[Yuii2ALlSi7 SHEET ONE OF TWO OI 4 Y 1177P sheet 75% chord model Finally select medium balsa ribs best contest-grade balsa can find sheeting other parts cant stress enough need build lightits secret success low Left false leading edge %2 balsa glued rib noses bottom leading edge sheeting ready glued place Right top sheeting ailerons leading edge shimmed back 1Ae balsa scraps allow capping aileron leading edge after its cut free February 1988 29 SPAR DETAIL 31/20WICMAKE TWO I/IGPLY _____3/BPINE FILL ENDS3/B BALSA FILL ENDSflA 31/20CUT LINE W2 MAKE TWO I/ILY I1L7A SECTION A-AH_ I/I6PLYBELLcRANK__ CUTOFF HORN III -BRO BALL LINK NOTE TRIMMED AND I BUILT UP AILERON SI-fARE ROM I/B BALSA GUIDE 11/2 TE PRING1/64______ NYRODRETURNPLY SECTION B-B __ TION C-C V7 I/I6BALSATE SHEETV SHAPE TIPBLOCK I/aID TUBEI/8 1/ SPR I/IGPLY- BLERSI/I6CAP STRIP I/16WE I/4 PLYTO R23 BLOCKKI/B W2-BAL SI/BI/ nut RIP2R3R4RSPRTRBR9RIDP11PIP13 }J1iI4P15 iijR1RP17 W I/lW WEB I/J3/B TO R26 SPRUCE I/I BALSA LE SHEET aspect ratio modelthe full-depth 6-in ply websWi and12-in section Butt two root ends Make two 59%-in spruce spar caps andW2 Mark position caps theand mark position refer plans Left Pin down left wing panel sheeting draw lines rib locations Note scrap pieces piy used guides make both halves Ri lean 350 provide scale dihedral Right spars should completed before cutting through brass tubing 30 Model Aviation Full-Size Plans Available. See Page 170 BOTTOM 202 CLOTHE BALSA TE SHEETTOP7/ -I I// __ /// / / --~18~~------ -I _--I / I/I6PLYFACING RIB MAKE TWOTOP 202 CLOTH ENOS]/ -0LET44RJGHT WEB CVERT GRAIN BALSA BLOCK TI SHIM I/BFOR WASHOUT 198 SHEET BAY I/IGPLYBOTTO _____________________________ OUNTTOP CUTOF ARM 0 R19R20R2IR22R23R24R25R26R27R28R2930 IStIEET TWO OF TW9 SA LE PIECE3/32BALSA FALSE LE 3A-in-OD brass tube cut 6% long ling around tube should extend 4 mark line position / x 3A-in spar capped scrap 1A6-in balsa ends root Dont force filler rear edge leading edge sheet Use cyanoacrylate CyA glue spar should slip fit Fill another 4 out Check leading edge sheet cut caps 12-in webs first checking with 3A-in balsa Now coat assembly oversize width allow attachment straightedges vertical alignment well filler spar caps epoxy 12 false leading edge Now draw lines correct taper tip satisfied root set rear rib locations leading edge trailing dihedral angle roughen brass 8-in-ply web butt-glue 4-in verti- edge Cut glue bottom root sheettube wipe acetone thinner tack cal balsa web After cure carefully ing cap strips aileron sheeting marks slow-setting CyA razor-saw through tube butt joint necessary dry finish drawing rib Cut piece %-in pine filler material Pin down leading edge trailing lines over pieces Glue bottom coat slow-setting epoxy prior fil- edge sheeting using straightedge spar cap leading edge sheet recheckLeft T-pins used maintain alignment spars epoxy cures Both W2 pieces epoxied spar Right Spar filler glued around 6/a-ln brass tube Use hardwood first 4 out root %in balsa remainder way out SCHWEIZER 1-268 SAILPLANE AC fltd BreD era c IOESIGNEO AND DRAWN BY ISTEVE IAnCWAJ bruary 1988 31 Left main brass tube tacked Wi ply webs Right An iiiustration gap ieft razor saw between in spar caps finished spar sections can later separated cleanly Note marked outline inside Wi webs used iocate tube spar caps satisfied fit glue ribs Make whatever corrections necessary fit upper cap glue ribs ensure proper alignment leading edge rib halves Ribs Ri through R6 pin straight piece scrap wood noses ribs R7 through next step glue 1-in balsa strips perimeter stab/elevator sheet RiO line up other Glue Ri 3 0 scale dihedral others 900 matching loft angle rib noses R6 Glue 36-in top rear x A-in spruce spar Make shim scrap balsa elevate trailing edge / R3 1 tapering zero thickness R24 Left Glue pre-tapered h-in balsa ribs biock balsa sievator horn mount stabilizer center ribs will filled scrap baisa later Right rudder fin laid up same way stab elevator Spruce spars glued over hinges aligned long piece music wire ilnes marked ribs before Alcohol softens balsa bend around curve 32 Model Aviation stab elevator construction begins Draw lines sheeting act guides pinning down sections balsa Large following full-scales rib locations Klett hinges set next pre-tapered spruce spars glued place ing straightedge right angle Po sition rear half Ri using 3 jig made scrap ply glue spar bottom sheet Continue rear halves R2 through R6 Slip ribs R7 through R3 1 between Left Balsa cores Ae sheeting prepared Note fin spar 1/a x %-in spruce tapered match rudderand its length will allow glued fuselage former F Right Du-Bro ball link plans show aileron ball link bolted piece brass sheet has silver soldered %2 music wire Trim fin spar bottom allow travel arm slip underneath Cut A-in balsa vertical webs fit snugly between ribs R19 R30 trim flush rib top angles Trim hinging system Before its glued trim bottom web between Ribs R22 R23 allow clevis pass through connect trimmed Du-Bro nylon horn Glue two false aileron ribs shaped R22 capture horn Glue aileron ribs Rl9b R3Ob side respective main ribs standing off A2 Add vertical-grain balsa webs spar called plan Glue spoiler in spruce subspar double outside Ribs R13 R18 scrap A-in balsa shaped top curve R12 Roughen aileron pushrod tubes attach points Ri R2 R20 R2 1 epoxy place same fash ion epoxy spoiler tubes Ri R2 R13 R14 R15 Also add A-in ply block inside Ri screw eye mount Carefully trim false leading edge %2-in balsa slightly oversize sanding slight angle bottom edge match rib curve After trimming necessary glue false leading edge bottom point rib noses leaving excess width extending above nose tops Pro tect tops ribs masking tape sand false leading edge down ly working toward angle curve top sheeting Bring bottom leading edge sheet up contact ribs false leading edge glue fast-setting CyA Install half-ribs Rib through R4b Glue top trailing edge sheeting Ri R19 pin down securely Also glue vari ous pieces aileron sheeting tops aileron spar aileron leading edge trailing edge diagonals /16-in balsa simulate diagonal ribs full-scale aileron Slip pre-drilled /6-in-ply aileron bellcrank mount place cable Du-Bro metal clevis connected bellcrank check action eliminate binding CyA mount two ribs Make up short pushrod threaded both ends Du-Bro ball joint connector bellcrank end metal clevis aile ron horn end rods will installed later prior covering Draw lines match rib tops underside leading edge sheet Use thixotropic heavy viscosity epoxy like Hobbypoxy Formula III apply rib tops false leading edgenot top spar cap Apply thin coat epoxy rib line avoiding rear cap contact point Carefully position top leading edge sheeting top cap approximately forward rear edge cap aligned attach rear edge sheet cap fast-setting CyA Gently smooth bend sheeting ward hand paint roller suring proper adhesion epoxy pin tape masking sheeting false leading edge fussy about fit sheeting lays down smoothly old phone books can ensure proper bend pressure Allow over night cure Trim excess balsa leading edge sheeting meets false leading edge sand flush Rough-cut first leading edge piece A-in balsa slightly oversize Glue false leading edge securing place pins dry add final piece leading edge material cut y16-in balsa sheet Add cap strips rib tops R20 through R29 Unpin wing panels board Plane rough-shape leading edges carefully tapering toward tip Sheet area between R30 R3 1 add balsa tip block Note cut block material proper angle prior gluing need sand top tip block get proper curve February 1988 33 Above The robust fuselage provides enormous amount room radio installation Notice routing spoiler line spoiler servo center location aileron/rudder servo allows coordination V-harness electronic manip ulation Large opening Lite Ply floor allows easy access re ceiver antenna tube Right long wire pin used secure elevator stab allows elevator removed Remove aileron cables join panels small piece 42-OD brass tube root ribs flush other Lay section down flat block up other section about mid-panel Roughen 4-in-ID brass tube cut 414 long seal ends scrap balsa clean solvent Separate panels slip tube through ribs six pre-drilled 46-in ply doublers root ribs aligned other pin leading trailing edges match Take time correct holes ribs doublers nec essary get unforced fit Coat dou blers thin layer slow-cure epoxy clamp ribs building small fillet epoxy inside joints After cure cut through tube carefully razor saw before Reposition wings washout shims place pin se curely complete top sheeting cap strips Cut spoiler blades 1-in trian gular trailing edge stock cut piece 4 ply exact dimensions front bottom piece Thinly coat ply epoxy tape bottom blade prevent shifting lay bay Weight assembly light pressure After curing protect sheeting surrounding box masking tape sand blade level sheeting duplicate airfoil curve MonoKote hinging system glue spruce bass strip fill 4-in gap between top leading edge sheet spoiler leading edge Install blade horn small Du-Bro return spring hook up spoiler string checking action binding eliminated Remove panel board cut aileron free sawing through rib carefully avoiding aileron spar Sand aileron leading edge angle 650 sand flush ribs protruding 4-in spar Face aileron A6-in balsa leaving notch born small Du-Bro aileron temporar ily taped place install short pushrod bellcrank Epoxy horn base removed between false ribs Bring aileron neutral position epoxy still uncured clip clevis Pin clamp aileron neutral allow cure Trim facing rib 46 ply match profile sheeted root rib final step glassing roots 2-oz cloth Cover bottom first section cut angle 4 out trailing edge 8 out leading edge top piece should end 8 out trailing edge 12 out lead ing edge used Hobbypoxy Formula II squeegeed out maximum amount resin After cures tape adjacent balsa areas masking tape prevent oversanding lightly sand cloth No second coat needed Fill Model Magic Filler Fill bench rash dings voids Model Magic Filler give wing finish sanding using Tee-Bar similar true-sanding tool Use heavier grit spar ingly complete final sanding 600 grit will give best finish base film covering like MonoKote used Tail surfaces scale outline 34 Model Aviation stab 12% total wing area ever did care flat plate section full-scale aircraft Therefore show 9%-thick diamond airfoil used prototype Cut shape sections /6-in very light balsa sheeting stab elevator outlines pin down Pencil scale rib positions Cut out lightening holes now desired Plane sand 4 x %-in spruce strips correct taper Glue two trailing edge stab leading edge elevator Correct mismatch sanding block Glue 4-in sq balsa strip stock leading trailing edge perimeters halves Use 4x h-in balsa stabilizer tips Glue pre-shaped triangular 4-instock ribs Remove halves relieve 46-in sheet spruce spars large Klett hinges loose pins Finish opposite side previous steps sand fin ished stabilizer shaping rounded lead ing edge sharper trailing edge elevator Install large Klett hinges slow-setting CyA using piece 032 music wire least 25 long keep hinges aligned other Add balsa block filler between lower upper center ribs stabilizer decide stab will removable see fuselage construction text Add A-in balsa pieces top bot tom elevator hinge line Tap elevator horn screws harden holes CyA Join two sections 032 wire round spruce leading edge elevator 1 travel direction Build fin rudder same man ner stabilizer elevator Note fins spruce spars extend down approxi mately 2 below F2 mate former F Add 3/ music wire arm rudder allow actuated inside fuse lage arm bent cut accept Du-Bro aileron ball link rudder must swing 300 deflection either direction former F has notched allow full left throw full throw elevator wire can withdrawn screwdriver blade inserted tail cone open metal clevis stabilizer unbolted Left An overhead shot rudder deflected left stab has removed reveal Du-Bro metal clevis used connect el evator horn within hollowed-out tail cone Right left spoiler fully raised show spring retainer small control horn Its good idea place name ad dress model case should ever fly away Also AMA Safety Code re quires model identified either name address AMA number S Fuselage Begin box sides trimming joining 1/16 balsa sheet /16 ply over outline wax-paper-covered plan Use ply B2 D proceed aft /16 balsa lightest weight making sure grain running vertically Glue /8 x A-in spruce strips perime ter section Remove wax paper complete right side Fill space between spruce longe rons B2 D %-in Lite Ply shape F2 Using Formula II epoxy Y32 ply pieces PL PR spruce strips parts touch Lite Ply spruce except lower longeron area aft former D cured carefully align tape two sections together drill %-in hole main tube 3146-in holes rear incidence spoiler tubes Separate two sections drill re spective Y6-in aileron cable holes Route out openings screw eyes Drill through Cl D elevator cable tube separate drill rudder cable tube hole D spoiler tube holes Cl Mark inside surface two fuse lage box sides x A-in spruce dou blers leaving gaps B2 Cl stopping D Cut strips glue inside noting bottom strips raised 42 allow later addition box floor Glue B2 Cl D using right trian gles check squareness formers side sides building board satisfied clamp sides gether Epoxy doubler tripler cut x %-in spruce flush top Cl glue x A-in spruce joints aft B2 either side Cl forward D tripling area top Cl will allow surface secure %-in brass tube epoxy brass tubes until satisfied wing aligmuent Wings should easily slip both main rod A2in drill rod tempered Rockwell C-Scale 42-45 incidence setting rod use incidence tube hole neces sary Brush Formula II add medium-weight glass cloth over both tubes contacting respective formers box sides Cut rectangle %2-in ply servo tray aft B2 cutouts servos switch harness rest box floor will formed 3A2-in balsa grain running side side used small piece 3A2-in ply cut out aileron servo aft Cl continued %2-in balsa E Flip box over mark centerline bottom B2 D Glue square strips /6 balsa either side line corresponding A-in thickness keel Trial fit Lite Ply keel servos place eye toward routing wires airborne system Make cutouts now left 3-in gap floor aft ply tray no apparent loss strength battery goes behind former 12 Ab pack recommended Trim keel pack leaving some space foam also After B 1 cut trace duplicate balsa ply use forward canopy tray Also trace one-piece copy former %2-in aircraft ply Make up A-in balsa ply pieces epoxied together right gles secret gentle heating epoxy heat gun flows will spread thinly over sheet Cut out turtledeck formers Tl through T3 A-in balsa T4 cut Lite Ply Notching should done after theyre glued place should already have decided point subject stringernosed sheeted area tar fledeck sheeted Trim formers areas allow sheet planking material Steady box bench slip wings rods checking fit PL PR Use straightedges keep sides square use pins board keep PL PR flush root ribs Bend sides together aft E Cut former E A-in balsa glue after drilling cable tubes Glue T4 F aligning center F points equidistant wing trail ing edges Mount fin platform F2 true fin right triangle Set fin aside epoxy F2 T4 F Stab mount S should epoxied now Line stab up hinge line right angle fuselage centerline tack glue S Drill two holes A-in nylon mounting bolts through balsa block stab S Counter sink balsa allow bolt heads sit flush top stab Lubricating bolts Vaseline put through stab snug up nuts satisfied stabs alignment run bead slow-cure CyA around nut February 1988 35 U author assembles Schweizer beginning two blistering 100 contest days first certainly last SOAR Scale Uprising Photo Dave Haertel Jack Hiner launches model author can concentratIon grabbing lots altitude Using helper launch lathe best way handle Sailpianes size Mike Macintyre plc Designed Ken Willard eamater 4 ON-Board Battery Tester Saves Time. Saves Models Install RC Models Check receiver battery status press button Small Light /2 oz Precise Rugged RX-1ORDER TODAY $1495at dealer Protune Corp 914 462-6452 USAP 0 Box 1808 Poughkeepsie NY 12601 U rims touch underside mount Glue scrap standing tail ends PL PR away gentle bend fit selage sides flush root ribs Glue A-in spruce dowel PL PR ap proximately F Install tubes elevator aile ron servo cables securing form ers epoxy small patch medium-weight glass cloth critical keeping tubes bending pop ping away formers under fight loads What can get away small Gliders woefully inadequate quarterscale models Notch turtledeck formers receive % x A-in spruce longerons Round top edges longerons prior gluing Make up keel epoxy %-in ply inserts receive brass wood screws used mounting skid Glue keel key piece A6-in balsa strips touches B 1 B2 B3 Glue former halves B3 C2 Laminate keel 2 ply either side skid mounting area save weight used 3-in ultralight wheel JoZ Products well liner %2-in balsa wetted slightly allow bend Glue glue %-in triangular balsa gussets brace keel After rounding outer edges glue first two horizontal ply nose formers will simu late tubing B2 after rounding outer edges should able use two pieces -in balsa sheet per side plank between B3 C2 Glue doubler strips balsa keel flush b6ttom B3 C2 planking support same planking will touch PL PR After planldng add rest Lite Ply shapes 3 Glue Bi finish formers Bi Cut canopy trays carefully A-in balsa ply begin work front can opy fitting up balsa ply former prepared match Bi Shape rear bow tray laminating two pieces 46 bass about /16 wide over former Trial fit bow tray after notching two rear corners glue sat isfied rear tray reverse aft shape matching Ti ward shape laminated bass matching front bow Finish trays two coats Formula H epoxy paint flat gray epoxy enamel provides best surface gluing canopy Wil holds RC-56 Plan instrument panel pilota DGA quarter-scale bust what chose because its light weight 1-26 steel tube turnover structure under rear canopy used Sullivans outer sleeves simulate thisdrinking straws would work just well Cover glue joints canopies touch trays bows strips painted plastic simu late aluminum framework rear can opy clear acetate sheet Continued page 129 36 Model Aviation Flies off both land water Crisply die-cut balsa ito ply parts complete hardware eas sembly sensible engineeng Qlear plans p oto illustrated assembly manual 50K229 Complete Catalog $200 ordered direct add Han 16 W 19th St PO Box 511 E7 Higginsville MO N64037 call 816 584-7121 Safety/Preston Continued page 22 ter received Stasi Poulos Dallas TX recently helping newcomer RC fly ing soloed become quite confident ability lost almost fear about flying wind day watched him take off 15 mph steady headwind ascent beautiful could until turned downwind made decision throttle back since plane seemed pick up much speed downwind leg plane banked slightly tried correct bank ailerons horror hollered ailerons werent work ing Yet still throttle elevator control Convinced victim chanical radio failure handed threw transmitter regained control landed tried explain him what happened plane turned downwind its air speed did change its speed over ground did student felt plane passing him too fast solution throt tIe back failed realize did re duce speed plane passed him no real indication planes airspeed reduced airspeed until plane stalled Ailerons change lift aircrafts wings no lift can swing want youll never know difference student said No way plane wasnt moving slow What really saw however stalled plane moving air mass Stasis description incident makes wonder radios have sent off correction failures really didnt occur opinion appreciation visual effect wind models flight characteristics has direct bearing safely fly Have safe month watch out downwind turns Schweizer/Moskal Continued page 36 forward canopy molded piece plastic clamped frame heated oven drawn over wooden plug method has described times other articlesone best being Steve Gray March 1987 issue Model Builder would rather make canopy available ready-made Shabo Scale 2416 North 66th Wauwatosa WI 52213 Plan canopy hold-downsrubberbands mini ature hooks simplest lightest Route pair inner Nyrods PL PR spoiler servo glue Install airborne gear check ac tions correcting binding rubbjng Complete turtledeck structure add crossgrain floor Xe-in balsa E U Glue both halves F3 four A-in balsa lower main stringer standoffs Laminate lower main stringer two pieces A-in-sq spruce Glue stand off formers /6-in floor fuse lage glue stringer running keel G Glue 1/16 angular balsa gussets brace standoffs floor Add piece Y32-sq spruce doubling top longeron Tl tapering aft F Complete two lower stringers running C2 F3 aft F3 keel Form skid two pieces 1A x /2-in spruce laminating form made common nails board Drill skid screw attach points re move cover glass cloth paint match scheme Some 1-26 aircraft fabric fairing cover gap between skid fuselage quite often no fair ing used tail nose cone built up balsa Shape tail cone A-in core Lite Ply hold shape ply core doubled A-in balsa carved correct taper Tack-glue fuselage check maximum travel elevator horn will later glued after painting covering carefully drilled center nose cone after shaping soft balsa %2-in ply disc matches former 4-40 hex head bolt eased piece -in brass tube used bushing created N shape 3A2-in ply would slip behind drilled 4-40 blind mounting nut holds nose cone place bolt tight ened access hole 4-40 bolt serves scale air vent common 1-26 nose cones battery pack way also has advantage being acces sible acts balancing weight STICKY BUSINESS NOW AVAILABLE ON VHS VIDEO ADHESIVEUU Frank Tiano Producer Bob Violett nician ira KEEP YOU OWED TO YOUR SEAT Contains everything want know about Zap Loctite adhesive product informative Humorous 2 hours two intermissions ideal club meetings Produced Frank Tiano Techniques Frank Tiano Bob Viotett NOW AVAILABLE FOR SHOWING $3495 Plus $2 Shipping & Handling Name CityState __________ Zip Send $3695 $3495 plus $2 shipping & handling check money order Frank Tiano Enterprises 2460 SW 85 Terrace Davie FL 33324 Allow 4-6 weeks delivery Sorry cannot deliver post office boxes MA February 1988 129 WORLD CLASS tA Retr *6 Tony Frackowiaks Challenge IV Kit Atlanta KitDash Kit Hattori Headers Pipes AMA&FAIRC Aerobatic Specialties PO Box 388914-248-8603 Lincoindale NY 10540 Send $100 catalog FIBERGLASS PARTS Over 237 cowls kit scratch built models Also over 34 round cowls ranging 4 14-718 diameter 55 duff size & shape wheel pants custom Make Parts Vacuum Form Canopies Pining send $1 unqist kt TAD FIBERILASS SPECIALTIES 30925 nlock Dept 4 Garden city Ml 48135 PHONE 313421-6358 BRAZED & HEAI-TREAIED WIRE GEARS & CABANES PHONE 313 261-9064 experience Great Performance Quartet DALOTEL 850 SPAN 69 ins WING AREA 830 sq ins CHIPMUNK 850 SPAN 70 ins WING AREA 850 sq ins SPAN 76 SPAN 72 ins EXTRA 230 WING AREA 900 sq ins ZLIN 526 WING AREA 900 sq ins 4 ALL BALSA ARFS AT ONE GREAT PRICE HOLIDAY SPECIAL $185 ea available direct select hobby shops c ZIMPRO MARKETING nose cone assembly glassed 2-oz cloth covered coat Formula II epoxy filled Model Magic Filler Now time plan unique details particular subject prior covering youve ever covered rubber-powered model silkspan-and-dope ap proach fuselage same except youll no doubt want use heat-shrink covering did easiest way cover stringered nose cut triangular section oversize starting top keel work downwards section sectionone large piece wont work rest fuselage can done three segments stringered turtledeck first left right sides down centerline Before covering glue inspection fair ing balsa rudder horn provide ac cess linkage needed scale inspection cover balsa circle covered MonoKote tack-glued fair ing after final covering Mount gear including main tail wheel Perfect -in balance model indi cated safe point Install radio fly ing surfaces check action controls rudder should have maxi mum 300 deflection either way ele vator should need /2-in maximum throw up down ailerons should have minimum differential 31that three up down spoilers need maximum throw 450 extremely effective fully open Epoxy fin F F2 after fuselage covered connect linkage glue inspec tion hatch Balancing mean aerodynamic chord MAC calculation see Brad Powers arti cle Model Aviation May 1980 has al ways resulted proper balance Sailplanes Ive calculated 1-26 MAC 12y6 translates 30% MAC measured root rib safe balance point model experience previ ous mid-winged Glider bridle launch very safe rings falls off mid-launch allows maxi mum rotation launch Balance plane prior covering adding weight far READY TO FLY Call 1-800-45-TO FLY *LOW PRICES *EASY TO ASSEMBLE *NO BUILDING *NO PAINTING Piper Cherokee-40$13099 Piper Cherokee-259599 Fokker E111-4010799 Fancy Stick-256599 Cessna 172-208999 engine included Eh SUNSHINE HOBBY 17721 South Western Avenue Gardens California 90247 forward possible minimize all-up weight care selection materi als use glues should result un covered airframe balancing 30% mean aerodynamic chord case prototype Covering marking used Super MonoKote because desire keep things light MonoKote trim sheets large letters Duplicating national signia made easy using Sigs stickon decalsluckily smaller size sheet perfect scale smaller mili tary nomenclature letters no push lift etc vinyl rub-ons After some experimentation found work best rubbed onto small section Mono Kote placed position cov ered wax paper sealed iron low temperature slightly below EconoKote range Youll note red flash running nose tail stock red K&B Superpoxy paint sprayed MonoKote after wiping clean ac etone masking pattern Install steel shoulder hook hardware store root about lage sides Remove hooks harden tapped hole CyA hooks will removable display judging Install main wheel cutting small hole Mono Kote side opposite axle hole Slip brass tube axle securing dab epoxy Now patch MonoKote Make up bridle least l00-lb-test braided nylon choose partner ex perience launching large Sailplanes Have him hold model left hand cupped front left leading edge right hand about T3 fuse first flights launch straight forward after gaining flying speed rotate gently up Radio Technique/Myers Continued page 39 Electronics Inc PO Box 996 Hauppauge NY 11788 telephone 516 265-1325 came neatest things Ive seen years wit Multicore Tip Tinner/Cleaner TTC 1 See photoContinued page 132 -Also Am0NCL Li6B/cHAI 84 fl SPAN VULT BT-13 VALIANT 84 IN SPAN ROLLED PlAN SE-- $20 ELCH FThERGIASS CC7JIS--------- *20 EkCH ADD 12oSHPflfGNYS ADD 8TAZ 130 Model Aviation PO BOX 3076 OAK RIDGE TN 37830 PHONE 61 5482-61 88 AERaTCLL3~/l\ FLYING iA SCAlE SPORT SCAlE AERONCA L3/EFNDEE105 IN 2 CYClE 90-13 II 4 CYClE 12-18 AERO PlANS N PARTS PO BOX 939 OIEAR NY 14760 1 372
Edition: Model Aviation - 1988/02
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 129, 130
acse spo estimatt perfori rining thai nvciled on0-de kit concept era joined at&ircr nd buyeras work rce tri rnng p 31 nice shape 5043-26 collection 01 inc r Pa oulder ho ors wife -26 Just offer mentioned ss rugg 1 RC pen allows rat spa malistic canca three neces model saus F ering eagles pea atten L-R ASK 7 IS 1515 pI1 lanes demi aistIc cr0 demand SingSt 1V57 401-26B Ti used Cobalt dished three-views v start documenting s did owners o d pencil add ur three-view judges understand ncies between di present b variations con Vintage Sailplan eem5 lad Bob # w dollars repairing tl fabric noses us almost e converted ig nose area think o r aspect ratIo design coupled dent ailerons makes tighter radius enhances model ws ability stay weak thermals build 1-26 wide variety markings available mod &Imost gliderport US has Ive found owners fiatthat someone might build miniature ir personal sailplane Finally few Sailplanes offer portability like lave make models fit Plymouth TC-3 custom convertwait Load camera doc tuat full-size 1-26 ruction Start wings tiue described will create correctly set wings later allows fu erly fitted wings original USAF 1-26 posed Al also delivered finished same drami 26 Model Aviation o delivery location ONE QUARTER SCALE ________ 126 B STEVE MOSKAL N 3/32 PLY1/16 BALSA 1/8 BALSA PLANKING RIBS 1/32 PLY TRIPLER3/32 BALSA 1/8 LITE PLY KEEL 1/16 BALSA SHEET 1/8 x 3/8 SPRUCE \1/8 LITE PLY N BLOCK BALSA 1/8 SQ SPRUCE LAM 1/3 BALSA 1/16 BALSA SAILPLANE1/16 BALSA 3/32 BALSA 1/8 50 SPRUCE N 7 N 1/16 BALSA SHEEt N N 1/8 x 1/4 SPRUCE N1/16 CAP STRIP N NNW xx N N N 1/16 WEB 00 Co_________ 0 Co 0 00 ____ 000 ____000r%3 000 _-F2 F-- so07G 00w4 0 -0ro - F yif F2GST4 F3 0i I/B LITE PLY Co _______________________CI 0 0 ro ___________________ ___0 0jCo NI/BLITEPLYKEEL w--BALSA BLOCKSHAPES KREMO VED FOR CLARITY 4-40 SOCKET4-4OBLINONUT HEAD BOLT C0 -BATTERY3/I650BALS /BOD BRASSI/8 BALSA PLANKING I/B PLY INSERT SPRUCE SKI I/BL AM r-LER- BOTH SIDES 82r IA B2CI 0- Dt DOUBLER FROM 3/32PLY C2 B3 B B B3 C 1 0 CI- 0 AILERON SERVO 3/16 50 BALSA 3/32 BALSA GUSSETS W II 3/32 WELL LINER LA JoZ WHEEL has said before countless articles Make up kit prior construction Get labeled model will fall together Ill repeat cost boring parts possible precut Notice 36-in top rear spar allows Left wing halves joined scrap tube note masking tape leading edge inside main tube rear incidence tube cut razor saw Right Epoxy 1As ply doublers Ri R2 Epoxy 1A-in-lD brass tube construction pics author 28 Model Aviation Co Ia C Full-Size Plans Available. Page 170 3/32 PLY1/8 BALSA BOTh SIDES E oII/lB BALSA_____ En T2T3 I/B BALSA ~2 NOTE PERK0___ SECTION C-CFILL WITH BALSA 7 CANOPY BOW I/8LITE PLYI/B BALSA PLY TRAYS - I/B I/4SPRUCE LONGERONS L/B3/B- I/B LITE PLY FILL K3/16BALS1/16 PLY WEB 82 TO 0I/BBALSA BOTH SIDES B I/4SPRUCE 1/BSPRUCEI/B BALSA 3/32 BALSA BOTH SIDES F I/BBALSAI/8oI/4SPRUCE / KANTENNA/I/B 00 WEL KEELANTENNA -I/BBALSA- 1/BSO SPRUCE I/BKEEL CANOPY BOW FORM TURTLEDECK STRINGERS REMOVED FOR CLARITY TT4I/4BAISA 8F2 C I/8LITE PLY I~f!I ___BALSA FILL rI/4BALSA WITH BALSAI/B DOWELSPRUCE LAMDOUBLWJ PERFECT 1/2 / I/B BALSAI/BSO/ WHEEL SAILPLANE NOTE TARER3732MUSIC WIREQUARTER SCALE DESIGNED AND DRAWN BY UCEL8SECTION 0-0DUBROAILERON[Yuii2ALlSi7 SHEET ONE OF TWO OI 4 Y 1177P sheet 75% chord model Finally select medium balsa ribs best contest-grade balsa can find sheeting other parts cant stress enough need build lightits secret success low Left false leading edge %2 balsa glued rib noses bottom leading edge sheeting ready glued place Right top sheeting ailerons leading edge shimmed back 1Ae balsa scraps allow capping aileron leading edge after its cut free February 1988 29 SPAR DETAIL 31/20WICMAKE TWO I/IGPLY _____3/BPINE FILL ENDS3/B BALSA FILL ENDSflA 31/20CUT LINE W2 MAKE TWO I/ILY I1L7A SECTION A-AH_ I/I6PLYBELLcRANK__ CUTOFF HORN III -BRO BALL LINK NOTE TRIMMED AND I BUILT UP AILERON SI-fARE ROM I/B BALSA GUIDE 11/2 TE PRING1/64______ NYRODRETURNPLY SECTION B-B __ TION C-C V7 I/I6BALSATE SHEETV SHAPE TIPBLOCK I/aID TUBEI/8 1/ SPR I/IGPLY- BLERSI/I6CAP STRIP I/16WE I/4 PLYTO R23 BLOCKKI/B W2-BAL SI/BI/ nut RIP2R3R4RSPRTRBR9RIDP11PIP13 }J1iI4P15 iijR1RP17 W I/lW WEB I/J3/B TO R26 SPRUCE I/I BALSA LE SHEET aspect ratio modelthe full-depth 6-in ply websWi and12-in section Butt two root ends Make two 59%-in spruce spar caps andW2 Mark position caps theand mark position refer plans Left Pin down left wing panel sheeting draw lines rib locations Note scrap pieces piy used guides make both halves Ri lean 350 provide scale dihedral Right spars should completed before cutting through brass tubing 30 Model Aviation Full-Size Plans Available. See Page 170 BOTTOM 202 CLOTHE BALSA TE SHEETTOP7/ -I I// __ /// / / --~18~~------ -I _--I / I/I6PLYFACING RIB MAKE TWOTOP 202 CLOTH ENOS]/ -0LET44RJGHT WEB CVERT GRAIN BALSA BLOCK TI SHIM I/BFOR WASHOUT 198 SHEET BAY I/IGPLYBOTTO _____________________________ OUNTTOP CUTOF ARM 0 R19R20R2IR22R23R24R25R26R27R28R2930 IStIEET TWO OF TW9 SA LE PIECE3/32BALSA FALSE LE 3A-in-OD brass tube cut 6% long ling around tube should extend 4 mark line position / x 3A-in spar capped scrap 1A6-in balsa ends root Dont force filler rear edge leading edge sheet Use cyanoacrylate CyA glue spar should slip fit Fill another 4 out Check leading edge sheet cut caps 12-in webs first checking with 3A-in balsa Now coat assembly oversize width allow attachment straightedges vertical alignment well filler spar caps epoxy 12 false leading edge Now draw lines correct taper tip satisfied root set rear rib locations leading edge trailing dihedral angle roughen brass 8-in-ply web butt-glue 4-in verti- edge Cut glue bottom root sheettube wipe acetone thinner tack cal balsa web After cure carefully ing cap strips aileron sheeting marks slow-setting CyA razor-saw through tube butt joint necessary dry finish drawing rib Cut piece %-in pine filler material Pin down leading edge trailing lines over pieces Glue bottom coat slow-setting epoxy prior fil- edge sheeting using straightedge spar cap leading edge sheet recheckLeft T-pins used maintain alignment spars epoxy cures Both W2 pieces epoxied spar Right Spar filler glued around 6/a-ln brass tube Use hardwood first 4 out root %in balsa remainder way out SCHWEIZER 1-268 SAILPLANE AC fltd BreD era c IOESIGNEO AND DRAWN BY ISTEVE IAnCWAJ bruary 1988 31 Left main brass tube tacked Wi ply webs Right An iiiustration gap ieft razor saw between in spar caps finished spar sections can later separated cleanly Note marked outline inside Wi webs used iocate tube spar caps satisfied fit glue ribs Make whatever corrections necessary fit upper cap glue ribs ensure proper alignment leading edge rib halves Ribs Ri through R6 pin straight piece scrap wood noses ribs R7 through next step glue 1-in balsa strips perimeter stab/elevator sheet RiO line up other Glue Ri 3 0 scale dihedral others 900 matching loft angle rib noses R6 Glue 36-in top rear x A-in spruce spar Make shim scrap balsa elevate trailing edge / R3 1 tapering zero thickness R24 Left Glue pre-tapered h-in balsa ribs biock balsa sievator horn mount stabilizer center ribs will filled scrap baisa later Right rudder fin laid up same way stab elevator Spruce spars glued over hinges aligned long piece music wire ilnes marked ribs before Alcohol softens balsa bend around curve 32 Model Aviation stab elevator construction begins Draw lines sheeting act guides pinning down sections balsa Large following full-scales rib locations Klett hinges set next pre-tapered spruce spars glued place ing straightedge right angle Po sition rear half Ri using 3 jig made scrap ply glue spar bottom sheet Continue rear halves R2 through R6 Slip ribs R7 through R3 1 between Left Balsa cores Ae sheeting prepared Note fin spar 1/a x %-in spruce tapered match rudderand its length will allow glued fuselage former F Right Du-Bro ball link plans show aileron ball link bolted piece brass sheet has silver soldered %2 music wire Trim fin spar bottom allow travel arm slip underneath Cut A-in balsa vertical webs fit snugly between ribs R19 R30 trim flush rib top angles Trim hinging system Before its glued trim bottom web between Ribs R22 R23 allow clevis pass through connect trimmed Du-Bro nylon horn Glue two false aileron ribs shaped R22 capture horn Glue aileron ribs Rl9b R3Ob side respective main ribs standing off A2 Add vertical-grain balsa webs spar called plan Glue spoiler in spruce subspar double outside Ribs R13 R18 scrap A-in balsa shaped top curve R12 Roughen aileron pushrod tubes attach points Ri R2 R20 R2 1 epoxy place same fash ion epoxy spoiler tubes Ri R2 R13 R14 R15 Also add A-in ply block inside Ri screw eye mount Carefully trim false leading edge %2-in balsa slightly oversize sanding slight angle bottom edge match rib curve After trimming necessary glue false leading edge bottom point rib noses leaving excess width extending above nose tops Pro tect tops ribs masking tape sand false leading edge down ly working toward angle curve top sheeting Bring bottom leading edge sheet up contact ribs false leading edge glue fast-setting CyA Install half-ribs Rib through R4b Glue top trailing edge sheeting Ri R19 pin down securely Also glue vari ous pieces aileron sheeting tops aileron spar aileron leading edge trailing edge diagonals /16-in balsa simulate diagonal ribs full-scale aileron Slip pre-drilled /6-in-ply aileron bellcrank mount place cable Du-Bro metal clevis connected bellcrank check action eliminate binding CyA mount two ribs Make up short pushrod threaded both ends Du-Bro ball joint connector bellcrank end metal clevis aile ron horn end rods will installed later prior covering Draw lines match rib tops underside leading edge sheet Use thixotropic heavy viscosity epoxy like Hobbypoxy Formula III apply rib tops false leading edgenot top spar cap Apply thin coat epoxy rib line avoiding rear cap contact point Carefully position top leading edge sheeting top cap approximately forward rear edge cap aligned attach rear edge sheet cap fast-setting CyA Gently smooth bend sheeting ward hand paint roller suring proper adhesion epoxy pin tape masking sheeting false leading edge fussy about fit sheeting lays down smoothly old phone books can ensure proper bend pressure Allow over night cure Trim excess balsa leading edge sheeting meets false leading edge sand flush Rough-cut first leading edge piece A-in balsa slightly oversize Glue false leading edge securing place pins dry add final piece leading edge material cut y16-in balsa sheet Add cap strips rib tops R20 through R29 Unpin wing panels board Plane rough-shape leading edges carefully tapering toward tip Sheet area between R30 R3 1 add balsa tip block Note cut block material proper angle prior gluing need sand top tip block get proper curve February 1988 33 Above The robust fuselage provides enormous amount room radio installation Notice routing spoiler line spoiler servo center location aileron/rudder servo allows coordination V-harness electronic manip ulation Large opening Lite Ply floor allows easy access re ceiver antenna tube Right long wire pin used secure elevator stab allows elevator removed Remove aileron cables join panels small piece 42-OD brass tube root ribs flush other Lay section down flat block up other section about mid-panel Roughen 4-in-ID brass tube cut 414 long seal ends scrap balsa clean solvent Separate panels slip tube through ribs six pre-drilled 46-in ply doublers root ribs aligned other pin leading trailing edges match Take time correct holes ribs doublers nec essary get unforced fit Coat dou blers thin layer slow-cure epoxy clamp ribs building small fillet epoxy inside joints After cure cut through tube carefully razor saw before Reposition wings washout shims place pin se curely complete top sheeting cap strips Cut spoiler blades 1-in trian gular trailing edge stock cut piece 4 ply exact dimensions front bottom piece Thinly coat ply epoxy tape bottom blade prevent shifting lay bay Weight assembly light pressure After curing protect sheeting surrounding box masking tape sand blade level sheeting duplicate airfoil curve MonoKote hinging system glue spruce bass strip fill 4-in gap between top leading edge sheet spoiler leading edge Install blade horn small Du-Bro return spring hook up spoiler string checking action binding eliminated Remove panel board cut aileron free sawing through rib carefully avoiding aileron spar Sand aileron leading edge angle 650 sand flush ribs protruding 4-in spar Face aileron A6-in balsa leaving notch born small Du-Bro aileron temporar ily taped place install short pushrod bellcrank Epoxy horn base removed between false ribs Bring aileron neutral position epoxy still uncured clip clevis Pin clamp aileron neutral allow cure Trim facing rib 46 ply match profile sheeted root rib final step glassing roots 2-oz cloth Cover bottom first section cut angle 4 out trailing edge 8 out leading edge top piece should end 8 out trailing edge 12 out lead ing edge used Hobbypoxy Formula II squeegeed out maximum amount resin After cures tape adjacent balsa areas masking tape prevent oversanding lightly sand cloth No second coat needed Fill Model Magic Filler Fill bench rash dings voids Model Magic Filler give wing finish sanding using Tee-Bar similar true-sanding tool Use heavier grit spar ingly complete final sanding 600 grit will give best finish base film covering like MonoKote used Tail surfaces scale outline 34 Model Aviation stab 12% total wing area ever did care flat plate section full-scale aircraft Therefore show 9%-thick diamond airfoil used prototype Cut shape sections /6-in very light balsa sheeting stab elevator outlines pin down Pencil scale rib positions Cut out lightening holes now desired Plane sand 4 x %-in spruce strips correct taper Glue two trailing edge stab leading edge elevator Correct mismatch sanding block Glue 4-in sq balsa strip stock leading trailing edge perimeters halves Use 4x h-in balsa stabilizer tips Glue pre-shaped triangular 4-instock ribs Remove halves relieve 46-in sheet spruce spars large Klett hinges loose pins Finish opposite side previous steps sand fin ished stabilizer shaping rounded lead ing edge sharper trailing edge elevator Install large Klett hinges slow-setting CyA using piece 032 music wire least 25 long keep hinges aligned other Add balsa block filler between lower upper center ribs stabilizer decide stab will removable see fuselage construction text Add A-in balsa pieces top bot tom elevator hinge line Tap elevator horn screws harden holes CyA Join two sections 032 wire round spruce leading edge elevator 1 travel direction Build fin rudder same man ner stabilizer elevator Note fins spruce spars extend down approxi mately 2 below F2 mate former F Add 3/ music wire arm rudder allow actuated inside fuse lage arm bent cut accept Du-Bro aileron ball link rudder must swing 300 deflection either direction former F has notched allow full left throw full throw elevator wire can withdrawn screwdriver blade inserted tail cone open metal clevis stabilizer unbolted Left An overhead shot rudder deflected left stab has removed reveal Du-Bro metal clevis used connect el evator horn within hollowed-out tail cone Right left spoiler fully raised show spring retainer small control horn Its good idea place name ad dress model case should ever fly away Also AMA Safety Code re quires model identified either name address AMA number S Fuselage Begin box sides trimming joining 1/16 balsa sheet /16 ply over outline wax-paper-covered plan Use ply B2 D proceed aft /16 balsa lightest weight making sure grain running vertically Glue /8 x A-in spruce strips perime ter section Remove wax paper complete right side Fill space between spruce longe rons B2 D %-in Lite Ply shape F2 Using Formula II epoxy Y32 ply pieces PL PR spruce strips parts touch Lite Ply spruce except lower longeron area aft former D cured carefully align tape two sections together drill %-in hole main tube 3146-in holes rear incidence spoiler tubes Separate two sections drill re spective Y6-in aileron cable holes Route out openings screw eyes Drill through Cl D elevator cable tube separate drill rudder cable tube hole D spoiler tube holes Cl Mark inside surface two fuse lage box sides x A-in spruce dou blers leaving gaps B2 Cl stopping D Cut strips glue inside noting bottom strips raised 42 allow later addition box floor Glue B2 Cl D using right trian gles check squareness formers side sides building board satisfied clamp sides gether Epoxy doubler tripler cut x %-in spruce flush top Cl glue x A-in spruce joints aft B2 either side Cl forward D tripling area top Cl will allow surface secure %-in brass tube epoxy brass tubes until satisfied wing aligmuent Wings should easily slip both main rod A2in drill rod tempered Rockwell C-Scale 42-45 incidence setting rod use incidence tube hole neces sary Brush Formula II add medium-weight glass cloth over both tubes contacting respective formers box sides Cut rectangle %2-in ply servo tray aft B2 cutouts servos switch harness rest box floor will formed 3A2-in balsa grain running side side used small piece 3A2-in ply cut out aileron servo aft Cl continued %2-in balsa E Flip box over mark centerline bottom B2 D Glue square strips /6 balsa either side line corresponding A-in thickness keel Trial fit Lite Ply keel servos place eye toward routing wires airborne system Make cutouts now left 3-in gap floor aft ply tray no apparent loss strength battery goes behind former 12 Ab pack recommended Trim keel pack leaving some space foam also After B 1 cut trace duplicate balsa ply use forward canopy tray Also trace one-piece copy former %2-in aircraft ply Make up A-in balsa ply pieces epoxied together right gles secret gentle heating epoxy heat gun flows will spread thinly over sheet Cut out turtledeck formers Tl through T3 A-in balsa T4 cut Lite Ply Notching should done after theyre glued place should already have decided point subject stringernosed sheeted area tar fledeck sheeted Trim formers areas allow sheet planking material Steady box bench slip wings rods checking fit PL PR Use straightedges keep sides square use pins board keep PL PR flush root ribs Bend sides together aft E Cut former E A-in balsa glue after drilling cable tubes Glue T4 F aligning center F points equidistant wing trail ing edges Mount fin platform F2 true fin right triangle Set fin aside epoxy F2 T4 F Stab mount S should epoxied now Line stab up hinge line right angle fuselage centerline tack glue S Drill two holes A-in nylon mounting bolts through balsa block stab S Counter sink balsa allow bolt heads sit flush top stab Lubricating bolts Vaseline put through stab snug up nuts satisfied stabs alignment run bead slow-cure CyA around nut February 1988 35 U author assembles Schweizer beginning two blistering 100 contest days first certainly last SOAR Scale Uprising Photo Dave Haertel Jack Hiner launches model author can concentratIon grabbing lots altitude Using helper launch lathe best way handle Sailpianes size Mike Macintyre plc Designed Ken Willard eamater 4 ON-Board Battery Tester Saves Time. Saves Models Install RC Models Check receiver battery status press button Small Light /2 oz Precise Rugged RX-1ORDER TODAY $1495at dealer Protune Corp 914 462-6452 USAP 0 Box 1808 Poughkeepsie NY 12601 U rims touch underside mount Glue scrap standing tail ends PL PR away gentle bend fit selage sides flush root ribs Glue A-in spruce dowel PL PR ap proximately F Install tubes elevator aile ron servo cables securing form ers epoxy small patch medium-weight glass cloth critical keeping tubes bending pop ping away formers under fight loads What can get away small Gliders woefully inadequate quarterscale models Notch turtledeck formers receive % x A-in spruce longerons Round top edges longerons prior gluing Make up keel epoxy %-in ply inserts receive brass wood screws used mounting skid Glue keel key piece A6-in balsa strips touches B 1 B2 B3 Glue former halves B3 C2 Laminate keel 2 ply either side skid mounting area save weight used 3-in ultralight wheel JoZ Products well liner %2-in balsa wetted slightly allow bend Glue glue %-in triangular balsa gussets brace keel After rounding outer edges glue first two horizontal ply nose formers will simu late tubing B2 after rounding outer edges should able use two pieces -in balsa sheet per side plank between B3 C2 Glue doubler strips balsa keel flush b6ttom B3 C2 planking support same planking will touch PL PR After planldng add rest Lite Ply shapes 3 Glue Bi finish formers Bi Cut canopy trays carefully A-in balsa ply begin work front can opy fitting up balsa ply former prepared match Bi Shape rear bow tray laminating two pieces 46 bass about /16 wide over former Trial fit bow tray after notching two rear corners glue sat isfied rear tray reverse aft shape matching Ti ward shape laminated bass matching front bow Finish trays two coats Formula H epoxy paint flat gray epoxy enamel provides best surface gluing canopy Wil holds RC-56 Plan instrument panel pilota DGA quarter-scale bust what chose because its light weight 1-26 steel tube turnover structure under rear canopy used Sullivans outer sleeves simulate thisdrinking straws would work just well Cover glue joints canopies touch trays bows strips painted plastic simu late aluminum framework rear can opy clear acetate sheet Continued page 129 36 Model Aviation Flies off both land water Crisply die-cut balsa ito ply parts complete hardware eas sembly sensible engineeng Qlear plans p oto illustrated assembly manual 50K229 Complete Catalog $200 ordered direct add Han 16 W 19th St PO Box 511 E7 Higginsville MO N64037 call 816 584-7121 Safety/Preston Continued page 22 ter received Stasi Poulos Dallas TX recently helping newcomer RC fly ing soloed become quite confident ability lost almost fear about flying wind day watched him take off 15 mph steady headwind ascent beautiful could until turned downwind made decision throttle back since plane seemed pick up much speed downwind leg plane banked slightly tried correct bank ailerons horror hollered ailerons werent work ing Yet still throttle elevator control Convinced victim chanical radio failure handed threw transmitter regained control landed tried explain him what happened plane turned downwind its air speed did change its speed over ground did student felt plane passing him too fast solution throt tIe back failed realize did re duce speed plane passed him no real indication planes airspeed reduced airspeed until plane stalled Ailerons change lift aircrafts wings no lift can swing want youll never know difference student said No way plane wasnt moving slow What really saw however stalled plane moving air mass Stasis description incident makes wonder radios have sent off correction failures really didnt occur opinion appreciation visual effect wind models flight characteristics has direct bearing safely fly Have safe month watch out downwind turns Schweizer/Moskal Continued page 36 forward canopy molded piece plastic clamped frame heated oven drawn over wooden plug method has described times other articlesone best being Steve Gray March 1987 issue Model Builder would rather make canopy available ready-made Shabo Scale 2416 North 66th Wauwatosa WI 52213 Plan canopy hold-downsrubberbands mini ature hooks simplest lightest Route pair inner Nyrods PL PR spoiler servo glue Install airborne gear check ac tions correcting binding rubbjng Complete turtledeck structure add crossgrain floor Xe-in balsa E U Glue both halves F3 four A-in balsa lower main stringer standoffs Laminate lower main stringer two pieces A-in-sq spruce Glue stand off formers /6-in floor fuse lage glue stringer running keel G Glue 1/16 angular balsa gussets brace standoffs floor Add piece Y32-sq spruce doubling top longeron Tl tapering aft F Complete two lower stringers running C2 F3 aft F3 keel Form skid two pieces 1A x /2-in spruce laminating form made common nails board Drill skid screw attach points re move cover glass cloth paint match scheme Some 1-26 aircraft fabric fairing cover gap between skid fuselage quite often no fair ing used tail nose cone built up balsa Shape tail cone A-in core Lite Ply hold shape ply core doubled A-in balsa carved correct taper Tack-glue fuselage check maximum travel elevator horn will later glued after painting covering carefully drilled center nose cone after shaping soft balsa %2-in ply disc matches former 4-40 hex head bolt eased piece -in brass tube used bushing created N shape 3A2-in ply would slip behind drilled 4-40 blind mounting nut holds nose cone place bolt tight ened access hole 4-40 bolt serves scale air vent common 1-26 nose cones battery pack way also has advantage being acces sible acts balancing weight STICKY BUSINESS NOW AVAILABLE ON VHS VIDEO ADHESIVEUU Frank Tiano Producer Bob Violett nician ira KEEP YOU OWED TO YOUR SEAT Contains everything want know about Zap Loctite adhesive product informative Humorous 2 hours two intermissions ideal club meetings Produced Frank Tiano Techniques Frank Tiano Bob Viotett NOW AVAILABLE FOR SHOWING $3495 Plus $2 Shipping & Handling Name CityState __________ Zip Send $3695 $3495 plus $2 shipping & handling check money order Frank Tiano Enterprises 2460 SW 85 Terrace Davie FL 33324 Allow 4-6 weeks delivery Sorry cannot deliver post office boxes MA February 1988 129 WORLD CLASS tA Retr *6 Tony Frackowiaks Challenge IV Kit Atlanta KitDash Kit Hattori Headers Pipes AMA&FAIRC Aerobatic Specialties PO Box 388914-248-8603 Lincoindale NY 10540 Send $100 catalog FIBERGLASS PARTS Over 237 cowls kit scratch built models Also over 34 round cowls ranging 4 14-718 diameter 55 duff size & shape wheel pants custom Make Parts Vacuum Form Canopies Pining send $1 unqist kt TAD FIBERILASS SPECIALTIES 30925 nlock Dept 4 Garden city Ml 48135 PHONE 313421-6358 BRAZED & HEAI-TREAIED WIRE GEARS & CABANES PHONE 313 261-9064 experience Great Performance Quartet DALOTEL 850 SPAN 69 ins WING AREA 830 sq ins CHIPMUNK 850 SPAN 70 ins WING AREA 850 sq ins SPAN 76 SPAN 72 ins EXTRA 230 WING AREA 900 sq ins ZLIN 526 WING AREA 900 sq ins 4 ALL BALSA ARFS AT ONE GREAT PRICE HOLIDAY SPECIAL $185 ea available direct select hobby shops c ZIMPRO MARKETING nose cone assembly glassed 2-oz cloth covered coat Formula II epoxy filled Model Magic Filler Now time plan unique details particular subject prior covering youve ever covered rubber-powered model silkspan-and-dope ap proach fuselage same except youll no doubt want use heat-shrink covering did easiest way cover stringered nose cut triangular section oversize starting top keel work downwards section sectionone large piece wont work rest fuselage can done three segments stringered turtledeck first left right sides down centerline Before covering glue inspection fair ing balsa rudder horn provide ac cess linkage needed scale inspection cover balsa circle covered MonoKote tack-glued fair ing after final covering Mount gear including main tail wheel Perfect -in balance model indi cated safe point Install radio fly ing surfaces check action controls rudder should have maxi mum 300 deflection either way ele vator should need /2-in maximum throw up down ailerons should have minimum differential 31that three up down spoilers need maximum throw 450 extremely effective fully open Epoxy fin F F2 after fuselage covered connect linkage glue inspec tion hatch Balancing mean aerodynamic chord MAC calculation see Brad Powers arti cle Model Aviation May 1980 has al ways resulted proper balance Sailplanes Ive calculated 1-26 MAC 12y6 translates 30% MAC measured root rib safe balance point model experience previ ous mid-winged Glider bridle launch very safe rings falls off mid-launch allows maxi mum rotation launch Balance plane prior covering adding weight far READY TO FLY Call 1-800-45-TO FLY *LOW PRICES *EASY TO ASSEMBLE *NO BUILDING *NO PAINTING Piper Cherokee-40$13099 Piper Cherokee-259599 Fokker E111-4010799 Fancy Stick-256599 Cessna 172-208999 engine included Eh SUNSHINE HOBBY 17721 South Western Avenue Gardens California 90247 forward possible minimize all-up weight care selection materi als use glues should result un covered airframe balancing 30% mean aerodynamic chord case prototype Covering marking used Super MonoKote because desire keep things light MonoKote trim sheets large letters Duplicating national signia made easy using Sigs stickon decalsluckily smaller size sheet perfect scale smaller mili tary nomenclature letters no push lift etc vinyl rub-ons After some experimentation found work best rubbed onto small section Mono Kote placed position cov ered wax paper sealed iron low temperature slightly below EconoKote range Youll note red flash running nose tail stock red K&B Superpoxy paint sprayed MonoKote after wiping clean ac etone masking pattern Install steel shoulder hook hardware store root about lage sides Remove hooks harden tapped hole CyA hooks will removable display judging Install main wheel cutting small hole Mono Kote side opposite axle hole Slip brass tube axle securing dab epoxy Now patch MonoKote Make up bridle least l00-lb-test braided nylon choose partner ex perience launching large Sailplanes Have him hold model left hand cupped front left leading edge right hand about T3 fuse first flights launch straight forward after gaining flying speed rotate gently up Radio Technique/Myers Continued page 39 Electronics Inc PO Box 996 Hauppauge NY 11788 telephone 516 265-1325 came neatest things Ive seen years wit Multicore Tip Tinner/Cleaner TTC 1 See photoContinued page 132 -Also Am0NCL Li6B/cHAI 84 fl SPAN VULT BT-13 VALIANT 84 IN SPAN ROLLED PlAN SE-- $20 ELCH FThERGIASS CC7JIS--------- *20 EkCH ADD 12oSHPflfGNYS ADD 8TAZ 130 Model Aviation PO BOX 3076 OAK RIDGE TN 37830 PHONE 61 5482-61 88 AERaTCLL3~/l\ FLYING iA SCAlE SPORT SCAlE AERONCA L3/EFNDEE105 IN 2 CYClE 90-13 II 4 CYClE 12-18 AERO PlANS N PARTS PO BOX 939 OIEAR NY 14760 1 372
Edition: Model Aviation - 1988/02
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 129, 130
acse spo estimatt perfori rining thai nvciled on0-de kit concept era joined at&ircr nd buyeras work rce tri rnng p 31 nice shape 5043-26 collection 01 inc r Pa oulder ho ors wife -26 Just offer mentioned ss rugg 1 RC pen allows rat spa malistic canca three neces model saus F ering eagles pea atten L-R ASK 7 IS 1515 pI1 lanes demi aistIc cr0 demand SingSt 1V57 401-26B Ti used Cobalt dished three-views v start documenting s did owners o d pencil add ur three-view judges understand ncies between di present b variations con Vintage Sailplan eem5 lad Bob # w dollars repairing tl fabric noses us almost e converted ig nose area think o r aspect ratIo design coupled dent ailerons makes tighter radius enhances model ws ability stay weak thermals build 1-26 wide variety markings available mod &Imost gliderport US has Ive found owners fiatthat someone might build miniature ir personal sailplane Finally few Sailplanes offer portability like lave make models fit Plymouth TC-3 custom convertwait Load camera doc tuat full-size 1-26 ruction Start wings tiue described will create correctly set wings later allows fu erly fitted wings original USAF 1-26 posed Al also delivered finished same drami 26 Model Aviation o delivery location ONE QUARTER SCALE ________ 126 B STEVE MOSKAL N 3/32 PLY1/16 BALSA 1/8 BALSA PLANKING RIBS 1/32 PLY TRIPLER3/32 BALSA 1/8 LITE PLY KEEL 1/16 BALSA SHEET 1/8 x 3/8 SPRUCE \1/8 LITE PLY N BLOCK BALSA 1/8 SQ SPRUCE LAM 1/3 BALSA 1/16 BALSA SAILPLANE1/16 BALSA 3/32 BALSA 1/8 50 SPRUCE N 7 N 1/16 BALSA SHEEt N N 1/8 x 1/4 SPRUCE N1/16 CAP STRIP N NNW xx N N N 1/16 WEB 00 Co_________ 0 Co 0 00 ____ 000 ____000r%3 000 _-F2 F-- so07G 00w4 0 -0ro - F yif F2GST4 F3 0i I/B LITE PLY Co _______________________CI 0 0 ro ___________________ ___0 0jCo NI/BLITEPLYKEEL w--BALSA BLOCKSHAPES KREMO VED FOR CLARITY 4-40 SOCKET4-4OBLINONUT HEAD BOLT C0 -BATTERY3/I650BALS /BOD BRASSI/8 BALSA PLANKING I/B PLY INSERT SPRUCE SKI I/BL AM r-LER- BOTH SIDES 82r IA B2CI 0- Dt DOUBLER FROM 3/32PLY C2 B3 B B B3 C 1 0 CI- 0 AILERON SERVO 3/16 50 BALSA 3/32 BALSA GUSSETS W II 3/32 WELL LINER LA JoZ WHEEL has said before countless articles Make up kit prior construction Get labeled model will fall together Ill repeat cost boring parts possible precut Notice 36-in top rear spar allows Left wing halves joined scrap tube note masking tape leading edge inside main tube rear incidence tube cut razor saw Right Epoxy 1As ply doublers Ri R2 Epoxy 1A-in-lD brass tube construction pics author 28 Model Aviation Co Ia C Full-Size Plans Available. Page 170 3/32 PLY1/8 BALSA BOTh SIDES E oII/lB BALSA_____ En T2T3 I/B BALSA ~2 NOTE PERK0___ SECTION C-CFILL WITH BALSA 7 CANOPY BOW I/8LITE PLYI/B BALSA PLY TRAYS - I/B I/4SPRUCE LONGERONS L/B3/B- I/B LITE PLY FILL K3/16BALS1/16 PLY WEB 82 TO 0I/BBALSA BOTH SIDES B I/4SPRUCE 1/BSPRUCEI/B BALSA 3/32 BALSA BOTH SIDES F I/BBALSAI/8oI/4SPRUCE / KANTENNA/I/B 00 WEL KEELANTENNA -I/BBALSA- 1/BSO SPRUCE I/BKEEL CANOPY BOW FORM TURTLEDECK STRINGERS REMOVED FOR CLARITY TT4I/4BAISA 8F2 C I/8LITE PLY I~f!I ___BALSA FILL rI/4BALSA WITH BALSAI/B DOWELSPRUCE LAMDOUBLWJ PERFECT 1/2 / I/B BALSAI/BSO/ WHEEL SAILPLANE NOTE TARER3732MUSIC WIREQUARTER SCALE DESIGNED AND DRAWN BY UCEL8SECTION 0-0DUBROAILERON[Yuii2ALlSi7 SHEET ONE OF TWO OI 4 Y 1177P sheet 75% chord model Finally select medium balsa ribs best contest-grade balsa can find sheeting other parts cant stress enough need build lightits secret success low Left false leading edge %2 balsa glued rib noses bottom leading edge sheeting ready glued place Right top sheeting ailerons leading edge shimmed back 1Ae balsa scraps allow capping aileron leading edge after its cut free February 1988 29 SPAR DETAIL 31/20WICMAKE TWO I/IGPLY _____3/BPINE FILL ENDS3/B BALSA FILL ENDSflA 31/20CUT LINE W2 MAKE TWO I/ILY I1L7A SECTION A-AH_ I/I6PLYBELLcRANK__ CUTOFF HORN III -BRO BALL LINK NOTE TRIMMED AND I BUILT UP AILERON SI-fARE ROM I/B BALSA GUIDE 11/2 TE PRING1/64______ NYRODRETURNPLY SECTION B-B __ TION C-C V7 I/I6BALSATE SHEETV SHAPE TIPBLOCK I/aID TUBEI/8 1/ SPR I/IGPLY- BLERSI/I6CAP STRIP I/16WE I/4 PLYTO R23 BLOCKKI/B W2-BAL SI/BI/ nut RIP2R3R4RSPRTRBR9RIDP11PIP13 }J1iI4P15 iijR1RP17 W I/lW WEB I/J3/B TO R26 SPRUCE I/I BALSA LE SHEET aspect ratio modelthe full-depth 6-in ply websWi and12-in section Butt two root ends Make two 59%-in spruce spar caps andW2 Mark position caps theand mark position refer plans Left Pin down left wing panel sheeting draw lines rib locations Note scrap pieces piy used guides make both halves Ri lean 350 provide scale dihedral Right spars should completed before cutting through brass tubing 30 Model Aviation Full-Size Plans Available. See Page 170 BOTTOM 202 CLOTHE BALSA TE SHEETTOP7/ -I I// __ /// / / --~18~~------ -I _--I / I/I6PLYFACING RIB MAKE TWOTOP 202 CLOTH ENOS]/ -0LET44RJGHT WEB CVERT GRAIN BALSA BLOCK TI SHIM I/BFOR WASHOUT 198 SHEET BAY I/IGPLYBOTTO _____________________________ OUNTTOP CUTOF ARM 0 R19R20R2IR22R23R24R25R26R27R28R2930 IStIEET TWO OF TW9 SA LE PIECE3/32BALSA FALSE LE 3A-in-OD brass tube cut 6% long ling around tube should extend 4 mark line position / x 3A-in spar capped scrap 1A6-in balsa ends root Dont force filler rear edge leading edge sheet Use cyanoacrylate CyA glue spar should slip fit Fill another 4 out Check leading edge sheet cut caps 12-in webs first checking with 3A-in balsa Now coat assembly oversize width allow attachment straightedges vertical alignment well filler spar caps epoxy 12 false leading edge Now draw lines correct taper tip satisfied root set rear rib locations leading edge trailing dihedral angle roughen brass 8-in-ply web butt-glue 4-in verti- edge Cut glue bottom root sheettube wipe acetone thinner tack cal balsa web After cure carefully ing cap strips aileron sheeting marks slow-setting CyA razor-saw through tube butt joint necessary dry finish drawing rib Cut piece %-in pine filler material Pin down leading edge trailing lines over pieces Glue bottom coat slow-setting epoxy prior fil- edge sheeting using straightedge spar cap leading edge sheet recheckLeft T-pins used maintain alignment spars epoxy cures Both W2 pieces epoxied spar Right Spar filler glued around 6/a-ln brass tube Use hardwood first 4 out root %in balsa remainder way out SCHWEIZER 1-268 SAILPLANE AC fltd BreD era c IOESIGNEO AND DRAWN BY ISTEVE IAnCWAJ bruary 1988 31 Left main brass tube tacked Wi ply webs Right An iiiustration gap ieft razor saw between in spar caps finished spar sections can later separated cleanly Note marked outline inside Wi webs used iocate tube spar caps satisfied fit glue ribs Make whatever corrections necessary fit upper cap glue ribs ensure proper alignment leading edge rib halves Ribs Ri through R6 pin straight piece scrap wood noses ribs R7 through next step glue 1-in balsa strips perimeter stab/elevator sheet RiO line up other Glue Ri 3 0 scale dihedral others 900 matching loft angle rib noses R6 Glue 36-in top rear x A-in spruce spar Make shim scrap balsa elevate trailing edge / R3 1 tapering zero thickness R24 Left Glue pre-tapered h-in balsa ribs biock balsa sievator horn mount stabilizer center ribs will filled scrap baisa later Right rudder fin laid up same way stab elevator Spruce spars glued over hinges aligned long piece music wire ilnes marked ribs before Alcohol softens balsa bend around curve 32 Model Aviation stab elevator construction begins Draw lines sheeting act guides pinning down sections balsa Large following full-scales rib locations Klett hinges set next pre-tapered spruce spars glued place ing straightedge right angle Po sition rear half Ri using 3 jig made scrap ply glue spar bottom sheet Continue rear halves R2 through R6 Slip ribs R7 through R3 1 between Left Balsa cores Ae sheeting prepared Note fin spar 1/a x %-in spruce tapered match rudderand its length will allow glued fuselage former F Right Du-Bro ball link plans show aileron ball link bolted piece brass sheet has silver soldered %2 music wire Trim fin spar bottom allow travel arm slip underneath Cut A-in balsa vertical webs fit snugly between ribs R19 R30 trim flush rib top angles Trim hinging system Before its glued trim bottom web between Ribs R22 R23 allow clevis pass through connect trimmed Du-Bro nylon horn Glue two false aileron ribs shaped R22 capture horn Glue aileron ribs Rl9b R3Ob side respective main ribs standing off A2 Add vertical-grain balsa webs spar called plan Glue spoiler in spruce subspar double outside Ribs R13 R18 scrap A-in balsa shaped top curve R12 Roughen aileron pushrod tubes attach points Ri R2 R20 R2 1 epoxy place same fash ion epoxy spoiler tubes Ri R2 R13 R14 R15 Also add A-in ply block inside Ri screw eye mount Carefully trim false leading edge %2-in balsa slightly oversize sanding slight angle bottom edge match rib curve After trimming necessary glue false leading edge bottom point rib noses leaving excess width extending above nose tops Pro tect tops ribs masking tape sand false leading edge down ly working toward angle curve top sheeting Bring bottom leading edge sheet up contact ribs false leading edge glue fast-setting CyA Install half-ribs Rib through R4b Glue top trailing edge sheeting Ri R19 pin down securely Also glue vari ous pieces aileron sheeting tops aileron spar aileron leading edge trailing edge diagonals /16-in balsa simulate diagonal ribs full-scale aileron Slip pre-drilled /6-in-ply aileron bellcrank mount place cable Du-Bro metal clevis connected bellcrank check action eliminate binding CyA mount two ribs Make up short pushrod threaded both ends Du-Bro ball joint connector bellcrank end metal clevis aile ron horn end rods will installed later prior covering Draw lines match rib tops underside leading edge sheet Use thixotropic heavy viscosity epoxy like Hobbypoxy Formula III apply rib tops false leading edgenot top spar cap Apply thin coat epoxy rib line avoiding rear cap contact point Carefully position top leading edge sheeting top cap approximately forward rear edge cap aligned attach rear edge sheet cap fast-setting CyA Gently smooth bend sheeting ward hand paint roller suring proper adhesion epoxy pin tape masking sheeting false leading edge fussy about fit sheeting lays down smoothly old phone books can ensure proper bend pressure Allow over night cure Trim excess balsa leading edge sheeting meets false leading edge sand flush Rough-cut first leading edge piece A-in balsa slightly oversize Glue false leading edge securing place pins dry add final piece leading edge material cut y16-in balsa sheet Add cap strips rib tops R20 through R29 Unpin wing panels board Plane rough-shape leading edges carefully tapering toward tip Sheet area between R30 R3 1 add balsa tip block Note cut block material proper angle prior gluing need sand top tip block get proper curve February 1988 33 Above The robust fuselage provides enormous amount room radio installation Notice routing spoiler line spoiler servo center location aileron/rudder servo allows coordination V-harness electronic manip ulation Large opening Lite Ply floor allows easy access re ceiver antenna tube Right long wire pin used secure elevator stab allows elevator removed Remove aileron cables join panels small piece 42-OD brass tube root ribs flush other Lay section down flat block up other section about mid-panel Roughen 4-in-ID brass tube cut 414 long seal ends scrap balsa clean solvent Separate panels slip tube through ribs six pre-drilled 46-in ply doublers root ribs aligned other pin leading trailing edges match Take time correct holes ribs doublers nec essary get unforced fit Coat dou blers thin layer slow-cure epoxy clamp ribs building small fillet epoxy inside joints After cure cut through tube carefully razor saw before Reposition wings washout shims place pin se curely complete top sheeting cap strips Cut spoiler blades 1-in trian gular trailing edge stock cut piece 4 ply exact dimensions front bottom piece Thinly coat ply epoxy tape bottom blade prevent shifting lay bay Weight assembly light pressure After curing protect sheeting surrounding box masking tape sand blade level sheeting duplicate airfoil curve MonoKote hinging system glue spruce bass strip fill 4-in gap between top leading edge sheet spoiler leading edge Install blade horn small Du-Bro return spring hook up spoiler string checking action binding eliminated Remove panel board cut aileron free sawing through rib carefully avoiding aileron spar Sand aileron leading edge angle 650 sand flush ribs protruding 4-in spar Face aileron A6-in balsa leaving notch born small Du-Bro aileron temporar ily taped place install short pushrod bellcrank Epoxy horn base removed between false ribs Bring aileron neutral position epoxy still uncured clip clevis Pin clamp aileron neutral allow cure Trim facing rib 46 ply match profile sheeted root rib final step glassing roots 2-oz cloth Cover bottom first section cut angle 4 out trailing edge 8 out leading edge top piece should end 8 out trailing edge 12 out lead ing edge used Hobbypoxy Formula II squeegeed out maximum amount resin After cures tape adjacent balsa areas masking tape prevent oversanding lightly sand cloth No second coat needed Fill Model Magic Filler Fill bench rash dings voids Model Magic Filler give wing finish sanding using Tee-Bar similar true-sanding tool Use heavier grit spar ingly complete final sanding 600 grit will give best finish base film covering like MonoKote used Tail surfaces scale outline 34 Model Aviation stab 12% total wing area ever did care flat plate section full-scale aircraft Therefore show 9%-thick diamond airfoil used prototype Cut shape sections /6-in very light balsa sheeting stab elevator outlines pin down Pencil scale rib positions Cut out lightening holes now desired Plane sand 4 x %-in spruce strips correct taper Glue two trailing edge stab leading edge elevator Correct mismatch sanding block Glue 4-in sq balsa strip stock leading trailing edge perimeters halves Use 4x h-in balsa stabilizer tips Glue pre-shaped triangular 4-instock ribs Remove halves relieve 46-in sheet spruce spars large Klett hinges loose pins Finish opposite side previous steps sand fin ished stabilizer shaping rounded lead ing edge sharper trailing edge elevator Install large Klett hinges slow-setting CyA using piece 032 music wire least 25 long keep hinges aligned other Add balsa block filler between lower upper center ribs stabilizer decide stab will removable see fuselage construction text Add A-in balsa pieces top bot tom elevator hinge line Tap elevator horn screws harden holes CyA Join two sections 032 wire round spruce leading edge elevator 1 travel direction Build fin rudder same man ner stabilizer elevator Note fins spruce spars extend down approxi mately 2 below F2 mate former F Add 3/ music wire arm rudder allow actuated inside fuse lage arm bent cut accept Du-Bro aileron ball link rudder must swing 300 deflection either direction former F has notched allow full left throw full throw elevator wire can withdrawn screwdriver blade inserted tail cone open metal clevis stabilizer unbolted Left An overhead shot rudder deflected left stab has removed reveal Du-Bro metal clevis used connect el evator horn within hollowed-out tail cone Right left spoiler fully raised show spring retainer small control horn Its good idea place name ad dress model case should ever fly away Also AMA Safety Code re quires model identified either name address AMA number S Fuselage Begin box sides trimming joining 1/16 balsa sheet /16 ply over outline wax-paper-covered plan Use ply B2 D proceed aft /16 balsa lightest weight making sure grain running vertically Glue /8 x A-in spruce strips perime ter section Remove wax paper complete right side Fill space between spruce longe rons B2 D %-in Lite Ply shape F2 Using Formula II epoxy Y32 ply pieces PL PR spruce strips parts touch Lite Ply spruce except lower longeron area aft former D cured carefully align tape two sections together drill %-in hole main tube 3146-in holes rear incidence spoiler tubes Separate two sections drill re spective Y6-in aileron cable holes Route out openings screw eyes Drill through Cl D elevator cable tube separate drill rudder cable tube hole D spoiler tube holes Cl Mark inside surface two fuse lage box sides x A-in spruce dou blers leaving gaps B2 Cl stopping D Cut strips glue inside noting bottom strips raised 42 allow later addition box floor Glue B2 Cl D using right trian gles check squareness formers side sides building board satisfied clamp sides gether Epoxy doubler tripler cut x %-in spruce flush top Cl glue x A-in spruce joints aft B2 either side Cl forward D tripling area top Cl will allow surface secure %-in brass tube epoxy brass tubes until satisfied wing aligmuent Wings should easily slip both main rod A2in drill rod tempered Rockwell C-Scale 42-45 incidence setting rod use incidence tube hole neces sary Brush Formula II add medium-weight glass cloth over both tubes contacting respective formers box sides Cut rectangle %2-in ply servo tray aft B2 cutouts servos switch harness rest box floor will formed 3A2-in balsa grain running side side used small piece 3A2-in ply cut out aileron servo aft Cl continued %2-in balsa E Flip box over mark centerline bottom B2 D Glue square strips /6 balsa either side line corresponding A-in thickness keel Trial fit Lite Ply keel servos place eye toward routing wires airborne system Make cutouts now left 3-in gap floor aft ply tray no apparent loss strength battery goes behind former 12 Ab pack recommended Trim keel pack leaving some space foam also After B 1 cut trace duplicate balsa ply use forward canopy tray Also trace one-piece copy former %2-in aircraft ply Make up A-in balsa ply pieces epoxied together right gles secret gentle heating epoxy heat gun flows will spread thinly over sheet Cut out turtledeck formers Tl through T3 A-in balsa T4 cut Lite Ply Notching should done after theyre glued place should already have decided point subject stringernosed sheeted area tar fledeck sheeted Trim formers areas allow sheet planking material Steady box bench slip wings rods checking fit PL PR Use straightedges keep sides square use pins board keep PL PR flush root ribs Bend sides together aft E Cut former E A-in balsa glue after drilling cable tubes Glue T4 F aligning center F points equidistant wing trail ing edges Mount fin platform F2 true fin right triangle Set fin aside epoxy F2 T4 F Stab mount S should epoxied now Line stab up hinge line right angle fuselage centerline tack glue S Drill two holes A-in nylon mounting bolts through balsa block stab S Counter sink balsa allow bolt heads sit flush top stab Lubricating bolts Vaseline put through stab snug up nuts satisfied stabs alignment run bead slow-cure CyA around nut February 1988 35 U author assembles Schweizer beginning two blistering 100 contest days first certainly last SOAR Scale Uprising Photo Dave Haertel Jack Hiner launches model author can concentratIon grabbing lots altitude Using helper launch lathe best way handle Sailpianes size Mike Macintyre plc Designed Ken Willard eamater 4 ON-Board Battery Tester Saves Time. Saves Models Install RC Models Check receiver battery status press button Small Light /2 oz Precise Rugged RX-1ORDER TODAY $1495at dealer Protune Corp 914 462-6452 USAP 0 Box 1808 Poughkeepsie NY 12601 U rims touch underside mount Glue scrap standing tail ends PL PR away gentle bend fit selage sides flush root ribs Glue A-in spruce dowel PL PR ap proximately F Install tubes elevator aile ron servo cables securing form ers epoxy small patch medium-weight glass cloth critical keeping tubes bending pop ping away formers under fight loads What can get away small Gliders woefully inadequate quarterscale models Notch turtledeck formers receive % x A-in spruce longerons Round top edges longerons prior gluing Make up keel epoxy %-in ply inserts receive brass wood screws used mounting skid Glue keel key piece A6-in balsa strips touches B 1 B2 B3 Glue former halves B3 C2 Laminate keel 2 ply either side skid mounting area save weight used 3-in ultralight wheel JoZ Products well liner %2-in balsa wetted slightly allow bend Glue glue %-in triangular balsa gussets brace keel After rounding outer edges glue first two horizontal ply nose formers will simu late tubing B2 after rounding outer edges should able use two pieces -in balsa sheet per side plank between B3 C2 Glue doubler strips balsa keel flush b6ttom B3 C2 planking support same planking will touch PL PR After planldng add rest Lite Ply shapes 3 Glue Bi finish formers Bi Cut canopy trays carefully A-in balsa ply begin work front can opy fitting up balsa ply former prepared match Bi Shape rear bow tray laminating two pieces 46 bass about /16 wide over former Trial fit bow tray after notching two rear corners glue sat isfied rear tray reverse aft shape matching Ti ward shape laminated bass matching front bow Finish trays two coats Formula H epoxy paint flat gray epoxy enamel provides best surface gluing canopy Wil holds RC-56 Plan instrument panel pilota DGA quarter-scale bust what chose because its light weight 1-26 steel tube turnover structure under rear canopy used Sullivans outer sleeves simulate thisdrinking straws would work just well Cover glue joints canopies touch trays bows strips painted plastic simu late aluminum framework rear can opy clear acetate sheet Continued page 129 36 Model Aviation Flies off both land water Crisply die-cut balsa ito ply parts complete hardware eas sembly sensible engineeng Qlear plans p oto illustrated assembly manual 50K229 Complete Catalog $200 ordered direct add Han 16 W 19th St PO Box 511 E7 Higginsville MO N64037 call 816 584-7121 Safety/Preston Continued page 22 ter received Stasi Poulos Dallas TX recently helping newcomer RC fly ing soloed become quite confident ability lost almost fear about flying wind day watched him take off 15 mph steady headwind ascent beautiful could until turned downwind made decision throttle back since plane seemed pick up much speed downwind leg plane banked slightly tried correct bank ailerons horror hollered ailerons werent work ing Yet still throttle elevator control Convinced victim chanical radio failure handed threw transmitter regained control landed tried explain him what happened plane turned downwind its air speed did change its speed over ground did student felt plane passing him too fast solution throt tIe back failed realize did re duce speed plane passed him no real indication planes airspeed reduced airspeed until plane stalled Ailerons change lift aircrafts wings no lift can swing want youll never know difference student said No way plane wasnt moving slow What really saw however stalled plane moving air mass Stasis description incident makes wonder radios have sent off correction failures really didnt occur opinion appreciation visual effect wind models flight characteristics has direct bearing safely fly Have safe month watch out downwind turns Schweizer/Moskal Continued page 36 forward canopy molded piece plastic clamped frame heated oven drawn over wooden plug method has described times other articlesone best being Steve Gray March 1987 issue Model Builder would rather make canopy available ready-made Shabo Scale 2416 North 66th Wauwatosa WI 52213 Plan canopy hold-downsrubberbands mini ature hooks simplest lightest Route pair inner Nyrods PL PR spoiler servo glue Install airborne gear check ac tions correcting binding rubbjng Complete turtledeck structure add crossgrain floor Xe-in balsa E U Glue both halves F3 four A-in balsa lower main stringer standoffs Laminate lower main stringer two pieces A-in-sq spruce Glue stand off formers /6-in floor fuse lage glue stringer running keel G Glue 1/16 angular balsa gussets brace standoffs floor Add piece Y32-sq spruce doubling top longeron Tl tapering aft F Complete two lower stringers running C2 F3 aft F3 keel Form skid two pieces 1A x /2-in spruce laminating form made common nails board Drill skid screw attach points re move cover glass cloth paint match scheme Some 1-26 aircraft fabric fairing cover gap between skid fuselage quite often no fair ing used tail nose cone built up balsa Shape tail cone A-in core Lite Ply hold shape ply core doubled A-in balsa carved correct taper Tack-glue fuselage check maximum travel elevator horn will later glued after painting covering carefully drilled center nose cone after shaping soft balsa %2-in ply disc matches former 4-40 hex head bolt eased piece -in brass tube used bushing created N shape 3A2-in ply would slip behind drilled 4-40 blind mounting nut holds nose cone place bolt tight ened access hole 4-40 bolt serves scale air vent common 1-26 nose cones battery pack way also has advantage being acces sible acts balancing weight STICKY BUSINESS NOW AVAILABLE ON VHS VIDEO ADHESIVEUU Frank Tiano Producer Bob Violett nician ira KEEP YOU OWED TO YOUR SEAT Contains everything want know about Zap Loctite adhesive product informative Humorous 2 hours two intermissions ideal club meetings Produced Frank Tiano Techniques Frank Tiano Bob Viotett NOW AVAILABLE FOR SHOWING $3495 Plus $2 Shipping & Handling Name CityState __________ Zip Send $3695 $3495 plus $2 shipping & handling check money order Frank Tiano Enterprises 2460 SW 85 Terrace Davie FL 33324 Allow 4-6 weeks delivery Sorry cannot deliver post office boxes MA February 1988 129 WORLD CLASS tA Retr *6 Tony Frackowiaks Challenge IV Kit Atlanta KitDash Kit Hattori Headers Pipes AMA&FAIRC Aerobatic Specialties PO Box 388914-248-8603 Lincoindale NY 10540 Send $100 catalog FIBERGLASS PARTS Over 237 cowls kit scratch built models Also over 34 round cowls ranging 4 14-718 diameter 55 duff size & shape wheel pants custom Make Parts Vacuum Form Canopies Pining send $1 unqist kt TAD FIBERILASS SPECIALTIES 30925 nlock Dept 4 Garden city Ml 48135 PHONE 313421-6358 BRAZED & HEAI-TREAIED WIRE GEARS & CABANES PHONE 313 261-9064 experience Great Performance Quartet DALOTEL 850 SPAN 69 ins WING AREA 830 sq ins CHIPMUNK 850 SPAN 70 ins WING AREA 850 sq ins SPAN 76 SPAN 72 ins EXTRA 230 WING AREA 900 sq ins ZLIN 526 WING AREA 900 sq ins 4 ALL BALSA ARFS AT ONE GREAT PRICE HOLIDAY SPECIAL $185 ea available direct select hobby shops c ZIMPRO MARKETING nose cone assembly glassed 2-oz cloth covered coat Formula II epoxy filled Model Magic Filler Now time plan unique details particular subject prior covering youve ever covered rubber-powered model silkspan-and-dope ap proach fuselage same except youll no doubt want use heat-shrink covering did easiest way cover stringered nose cut triangular section oversize starting top keel work downwards section sectionone large piece wont work rest fuselage can done three segments stringered turtledeck first left right sides down centerline Before covering glue inspection fair ing balsa rudder horn provide ac cess linkage needed scale inspection cover balsa circle covered MonoKote tack-glued fair ing after final covering Mount gear including main tail wheel Perfect -in balance model indi cated safe point Install radio fly ing surfaces check action controls rudder should have maxi mum 300 deflection either way ele vator should need /2-in maximum throw up down ailerons should have minimum differential 31that three up down spoilers need maximum throw 450 extremely effective fully open Epoxy fin F F2 after fuselage covered connect linkage glue inspec tion hatch Balancing mean aerodynamic chord MAC calculation see Brad Powers arti cle Model Aviation May 1980 has al ways resulted proper balance Sailplanes Ive calculated 1-26 MAC 12y6 translates 30% MAC measured root rib safe balance point model experience previ ous mid-winged Glider bridle launch very safe rings falls off mid-launch allows maxi mum rotation launch Balance plane prior covering adding weight far READY TO FLY Call 1-800-45-TO FLY *LOW PRICES *EASY TO ASSEMBLE *NO BUILDING *NO PAINTING Piper Cherokee-40$13099 Piper Cherokee-259599 Fokker E111-4010799 Fancy Stick-256599 Cessna 172-208999 engine included Eh SUNSHINE HOBBY 17721 South Western Avenue Gardens California 90247 forward possible minimize all-up weight care selection materi als use glues should result un covered airframe balancing 30% mean aerodynamic chord case prototype Covering marking used Super MonoKote because desire keep things light MonoKote trim sheets large letters Duplicating national signia made easy using Sigs stickon decalsluckily smaller size sheet perfect scale smaller mili tary nomenclature letters no push lift etc vinyl rub-ons After some experimentation found work best rubbed onto small section Mono Kote placed position cov ered wax paper sealed iron low temperature slightly below EconoKote range Youll note red flash running nose tail stock red K&B Superpoxy paint sprayed MonoKote after wiping clean ac etone masking pattern Install steel shoulder hook hardware store root about lage sides Remove hooks harden tapped hole CyA hooks will removable display judging Install main wheel cutting small hole Mono Kote side opposite axle hole Slip brass tube axle securing dab epoxy Now patch MonoKote Make up bridle least l00-lb-test braided nylon choose partner ex perience launching large Sailplanes Have him hold model left hand cupped front left leading edge right hand about T3 fuse first flights launch straight forward after gaining flying speed rotate gently up Radio Technique/Myers Continued page 39 Electronics Inc PO Box 996 Hauppauge NY 11788 telephone 516 265-1325 came neatest things Ive seen years wit Multicore Tip Tinner/Cleaner TTC 1 See photoContinued page 132 -Also Am0NCL Li6B/cHAI 84 fl SPAN VULT BT-13 VALIANT 84 IN SPAN ROLLED PlAN SE-- $20 ELCH FThERGIASS CC7JIS--------- *20 EkCH ADD 12oSHPflfGNYS ADD 8TAZ 130 Model Aviation PO BOX 3076 OAK RIDGE TN 37830 PHONE 61 5482-61 88 AERaTCLL3~/l\ FLYING iA SCAlE SPORT SCAlE AERONCA L3/EFNDEE105 IN 2 CYClE 90-13 II 4 CYClE 12-18 AERO PlANS N PARTS PO BOX 939 OIEAR NY 14760 1 372
Edition: Model Aviation - 1988/02
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 129, 130
acse spo estimatt perfori rining thai nvciled on0-de kit concept era joined at&ircr nd buyeras work rce tri rnng p 31 nice shape 5043-26 collection 01 inc r Pa oulder ho ors wife -26 Just offer mentioned ss rugg 1 RC pen allows rat spa malistic canca three neces model saus F ering eagles pea atten L-R ASK 7 IS 1515 pI1 lanes demi aistIc cr0 demand SingSt 1V57 401-26B Ti used Cobalt dished three-views v start documenting s did owners o d pencil add ur three-view judges understand ncies between di present b variations con Vintage Sailplan eem5 lad Bob # w dollars repairing tl fabric noses us almost e converted ig nose area think o r aspect ratIo design coupled dent ailerons makes tighter radius enhances model ws ability stay weak thermals build 1-26 wide variety markings available mod &Imost gliderport US has Ive found owners fiatthat someone might build miniature ir personal sailplane Finally few Sailplanes offer portability like lave make models fit Plymouth TC-3 custom convertwait Load camera doc tuat full-size 1-26 ruction Start wings tiue described will create correctly set wings later allows fu erly fitted wings original USAF 1-26 posed Al also delivered finished same drami 26 Model Aviation o delivery location ONE QUARTER SCALE ________ 126 B STEVE MOSKAL N 3/32 PLY1/16 BALSA 1/8 BALSA PLANKING RIBS 1/32 PLY TRIPLER3/32 BALSA 1/8 LITE PLY KEEL 1/16 BALSA SHEET 1/8 x 3/8 SPRUCE \1/8 LITE PLY N BLOCK BALSA 1/8 SQ SPRUCE LAM 1/3 BALSA 1/16 BALSA SAILPLANE1/16 BALSA 3/32 BALSA 1/8 50 SPRUCE N 7 N 1/16 BALSA SHEEt N N 1/8 x 1/4 SPRUCE N1/16 CAP STRIP N NNW xx N N N 1/16 WEB 00 Co_________ 0 Co 0 00 ____ 000 ____000r%3 000 _-F2 F-- so07G 00w4 0 -0ro - F yif F2GST4 F3 0i I/B LITE PLY Co _______________________CI 0 0 ro ___________________ ___0 0jCo NI/BLITEPLYKEEL w--BALSA BLOCKSHAPES KREMO VED FOR CLARITY 4-40 SOCKET4-4OBLINONUT HEAD BOLT C0 -BATTERY3/I650BALS /BOD BRASSI/8 BALSA PLANKING I/B PLY INSERT SPRUCE SKI I/BL AM r-LER- BOTH SIDES 82r IA B2CI 0- Dt DOUBLER FROM 3/32PLY C2 B3 B B B3 C 1 0 CI- 0 AILERON SERVO 3/16 50 BALSA 3/32 BALSA GUSSETS W II 3/32 WELL LINER LA JoZ WHEEL has said before countless articles Make up kit prior construction Get labeled model will fall together Ill repeat cost boring parts possible precut Notice 36-in top rear spar allows Left wing halves joined scrap tube note masking tape leading edge inside main tube rear incidence tube cut razor saw Right Epoxy 1As ply doublers Ri R2 Epoxy 1A-in-lD brass tube construction pics author 28 Model Aviation Co Ia C Full-Size Plans Available. Page 170 3/32 PLY1/8 BALSA BOTh SIDES E oII/lB BALSA_____ En T2T3 I/B BALSA ~2 NOTE PERK0___ SECTION C-CFILL WITH BALSA 7 CANOPY BOW I/8LITE PLYI/B BALSA PLY TRAYS - I/B I/4SPRUCE LONGERONS L/B3/B- I/B LITE PLY FILL K3/16BALS1/16 PLY WEB 82 TO 0I/BBALSA BOTH SIDES B I/4SPRUCE 1/BSPRUCEI/B BALSA 3/32 BALSA BOTH SIDES F I/BBALSAI/8oI/4SPRUCE / KANTENNA/I/B 00 WEL KEELANTENNA -I/BBALSA- 1/BSO SPRUCE I/BKEEL CANOPY BOW FORM TURTLEDECK STRINGERS REMOVED FOR CLARITY TT4I/4BAISA 8F2 C I/8LITE PLY I~f!I ___BALSA FILL rI/4BALSA WITH BALSAI/B DOWELSPRUCE LAMDOUBLWJ PERFECT 1/2 / I/B BALSAI/BSO/ WHEEL SAILPLANE NOTE TARER3732MUSIC WIREQUARTER SCALE DESIGNED AND DRAWN BY UCEL8SECTION 0-0DUBROAILERON[Yuii2ALlSi7 SHEET ONE OF TWO OI 4 Y 1177P sheet 75% chord model Finally select medium balsa ribs best contest-grade balsa can find sheeting other parts cant stress enough need build lightits secret success low Left false leading edge %2 balsa glued rib noses bottom leading edge sheeting ready glued place Right top sheeting ailerons leading edge shimmed back 1Ae balsa scraps allow capping aileron leading edge after its cut free February 1988 29 SPAR DETAIL 31/20WICMAKE TWO I/IGPLY _____3/BPINE FILL ENDS3/B BALSA FILL ENDSflA 31/20CUT LINE W2 MAKE TWO I/ILY I1L7A SECTION A-AH_ I/I6PLYBELLcRANK__ CUTOFF HORN III -BRO BALL LINK NOTE TRIMMED AND I BUILT UP AILERON SI-fARE ROM I/B BALSA GUIDE 11/2 TE PRING1/64______ NYRODRETURNPLY SECTION B-B __ TION C-C V7 I/I6BALSATE SHEETV SHAPE TIPBLOCK I/aID TUBEI/8 1/ SPR I/IGPLY- BLERSI/I6CAP STRIP I/16WE I/4 PLYTO R23 BLOCKKI/B W2-BAL SI/BI/ nut RIP2R3R4RSPRTRBR9RIDP11PIP13 }J1iI4P15 iijR1RP17 W I/lW WEB I/J3/B TO R26 SPRUCE I/I BALSA LE SHEET aspect ratio modelthe full-depth 6-in ply websWi and12-in section Butt two root ends Make two 59%-in spruce spar caps andW2 Mark position caps theand mark position refer plans Left Pin down left wing panel sheeting draw lines rib locations Note scrap pieces piy used guides make both halves Ri lean 350 provide scale dihedral Right spars should completed before cutting through brass tubing 30 Model Aviation Full-Size Plans Available. See Page 170 BOTTOM 202 CLOTHE BALSA TE SHEETTOP7/ -I I// __ /// / / --~18~~------ -I _--I / I/I6PLYFACING RIB MAKE TWOTOP 202 CLOTH ENOS]/ -0LET44RJGHT WEB CVERT GRAIN BALSA BLOCK TI SHIM I/BFOR WASHOUT 198 SHEET BAY I/IGPLYBOTTO _____________________________ OUNTTOP CUTOF ARM 0 R19R20R2IR22R23R24R25R26R27R28R2930 IStIEET TWO OF TW9 SA LE PIECE3/32BALSA FALSE LE 3A-in-OD brass tube cut 6% long ling around tube should extend 4 mark line position / x 3A-in spar capped scrap 1A6-in balsa ends root Dont force filler rear edge leading edge sheet Use cyanoacrylate CyA glue spar should slip fit Fill another 4 out Check leading edge sheet cut caps 12-in webs first checking with 3A-in balsa Now coat assembly oversize width allow attachment straightedges vertical alignment well filler spar caps epoxy 12 false leading edge Now draw lines correct taper tip satisfied root set rear rib locations leading edge trailing dihedral angle roughen brass 8-in-ply web butt-glue 4-in verti- edge Cut glue bottom root sheettube wipe acetone thinner tack cal balsa web After cure carefully ing cap strips aileron sheeting marks slow-setting CyA razor-saw through tube butt joint necessary dry finish drawing rib Cut piece %-in pine filler material Pin down leading edge trailing lines over pieces Glue bottom coat slow-setting epoxy prior fil- edge sheeting using straightedge spar cap leading edge sheet recheckLeft T-pins used maintain alignment spars epoxy cures Both W2 pieces epoxied spar Right Spar filler glued around 6/a-ln brass tube Use hardwood first 4 out root %in balsa remainder way out SCHWEIZER 1-268 SAILPLANE AC fltd BreD era c IOESIGNEO AND DRAWN BY ISTEVE IAnCWAJ bruary 1988 31 Left main brass tube tacked Wi ply webs Right An iiiustration gap ieft razor saw between in spar caps finished spar sections can later separated cleanly Note marked outline inside Wi webs used iocate tube spar caps satisfied fit glue ribs Make whatever corrections necessary fit upper cap glue ribs ensure proper alignment leading edge rib halves Ribs Ri through R6 pin straight piece scrap wood noses ribs R7 through next step glue 1-in balsa strips perimeter stab/elevator sheet RiO line up other Glue Ri 3 0 scale dihedral others 900 matching loft angle rib noses R6 Glue 36-in top rear x A-in spruce spar Make shim scrap balsa elevate trailing edge / R3 1 tapering zero thickness R24 Left Glue pre-tapered h-in balsa ribs biock balsa sievator horn mount stabilizer center ribs will filled scrap baisa later Right rudder fin laid up same way stab elevator Spruce spars glued over hinges aligned long piece music wire ilnes marked ribs before Alcohol softens balsa bend around curve 32 Model Aviation stab elevator construction begins Draw lines sheeting act guides pinning down sections balsa Large following full-scales rib locations Klett hinges set next pre-tapered spruce spars glued place ing straightedge right angle Po sition rear half Ri using 3 jig made scrap ply glue spar bottom sheet Continue rear halves R2 through R6 Slip ribs R7 through R3 1 between Left Balsa cores Ae sheeting prepared Note fin spar 1/a x %-in spruce tapered match rudderand its length will allow glued fuselage former F Right Du-Bro ball link plans show aileron ball link bolted piece brass sheet has silver soldered %2 music wire Trim fin spar bottom allow travel arm slip underneath Cut A-in balsa vertical webs fit snugly between ribs R19 R30 trim flush rib top angles Trim hinging system Before its glued trim bottom web between Ribs R22 R23 allow clevis pass through connect trimmed Du-Bro nylon horn Glue two false aileron ribs shaped R22 capture horn Glue aileron ribs Rl9b R3Ob side respective main ribs standing off A2 Add vertical-grain balsa webs spar called plan Glue spoiler in spruce subspar double outside Ribs R13 R18 scrap A-in balsa shaped top curve R12 Roughen aileron pushrod tubes attach points Ri R2 R20 R2 1 epoxy place same fash ion epoxy spoiler tubes Ri R2 R13 R14 R15 Also add A-in ply block inside Ri screw eye mount Carefully trim false leading edge %2-in balsa slightly oversize sanding slight angle bottom edge match rib curve After trimming necessary glue false leading edge bottom point rib noses leaving excess width extending above nose tops Pro tect tops ribs masking tape sand false leading edge down ly working toward angle curve top sheeting Bring bottom leading edge sheet up contact ribs false leading edge glue fast-setting CyA Install half-ribs Rib through R4b Glue top trailing edge sheeting Ri R19 pin down securely Also glue vari ous pieces aileron sheeting tops aileron spar aileron leading edge trailing edge diagonals /16-in balsa simulate diagonal ribs full-scale aileron Slip pre-drilled /6-in-ply aileron bellcrank mount place cable Du-Bro metal clevis connected bellcrank check action eliminate binding CyA mount two ribs Make up short pushrod threaded both ends Du-Bro ball joint connector bellcrank end metal clevis aile ron horn end rods will installed later prior covering Draw lines match rib tops underside leading edge sheet Use thixotropic heavy viscosity epoxy like Hobbypoxy Formula III apply rib tops false leading edgenot top spar cap Apply thin coat epoxy rib line avoiding rear cap contact point Carefully position top leading edge sheeting top cap approximately forward rear edge cap aligned attach rear edge sheet cap fast-setting CyA Gently smooth bend sheeting ward hand paint roller suring proper adhesion epoxy pin tape masking sheeting false leading edge fussy about fit sheeting lays down smoothly old phone books can ensure proper bend pressure Allow over night cure Trim excess balsa leading edge sheeting meets false leading edge sand flush Rough-cut first leading edge piece A-in balsa slightly oversize Glue false leading edge securing place pins dry add final piece leading edge material cut y16-in balsa sheet Add cap strips rib tops R20 through R29 Unpin wing panels board Plane rough-shape leading edges carefully tapering toward tip Sheet area between R30 R3 1 add balsa tip block Note cut block material proper angle prior gluing need sand top tip block get proper curve February 1988 33 Above The robust fuselage provides enormous amount room radio installation Notice routing spoiler line spoiler servo center location aileron/rudder servo allows coordination V-harness electronic manip ulation Large opening Lite Ply floor allows easy access re ceiver antenna tube Right long wire pin used secure elevator stab allows elevator removed Remove aileron cables join panels small piece 42-OD brass tube root ribs flush other Lay section down flat block up other section about mid-panel Roughen 4-in-ID brass tube cut 414 long seal ends scrap balsa clean solvent Separate panels slip tube through ribs six pre-drilled 46-in ply doublers root ribs aligned other pin leading trailing edges match Take time correct holes ribs doublers nec essary get unforced fit Coat dou blers thin layer slow-cure epoxy clamp ribs building small fillet epoxy inside joints After cure cut through tube carefully razor saw before Reposition wings washout shims place pin se curely complete top sheeting cap strips Cut spoiler blades 1-in trian gular trailing edge stock cut piece 4 ply exact dimensions front bottom piece Thinly coat ply epoxy tape bottom blade prevent shifting lay bay Weight assembly light pressure After curing protect sheeting surrounding box masking tape sand blade level sheeting duplicate airfoil curve MonoKote hinging system glue spruce bass strip fill 4-in gap between top leading edge sheet spoiler leading edge Install blade horn small Du-Bro return spring hook up spoiler string checking action binding eliminated Remove panel board cut aileron free sawing through rib carefully avoiding aileron spar Sand aileron leading edge angle 650 sand flush ribs protruding 4-in spar Face aileron A6-in balsa leaving notch born small Du-Bro aileron temporar ily taped place install short pushrod bellcrank Epoxy horn base removed between false ribs Bring aileron neutral position epoxy still uncured clip clevis Pin clamp aileron neutral allow cure Trim facing rib 46 ply match profile sheeted root rib final step glassing roots 2-oz cloth Cover bottom first section cut angle 4 out trailing edge 8 out leading edge top piece should end 8 out trailing edge 12 out lead ing edge used Hobbypoxy Formula II squeegeed out maximum amount resin After cures tape adjacent balsa areas masking tape prevent oversanding lightly sand cloth No second coat needed Fill Model Magic Filler Fill bench rash dings voids Model Magic Filler give wing finish sanding using Tee-Bar similar true-sanding tool Use heavier grit spar ingly complete final sanding 600 grit will give best finish base film covering like MonoKote used Tail surfaces scale outline 34 Model Aviation stab 12% total wing area ever did care flat plate section full-scale aircraft Therefore show 9%-thick diamond airfoil used prototype Cut shape sections /6-in very light balsa sheeting stab elevator outlines pin down Pencil scale rib positions Cut out lightening holes now desired Plane sand 4 x %-in spruce strips correct taper Glue two trailing edge stab leading edge elevator Correct mismatch sanding block Glue 4-in sq balsa strip stock leading trailing edge perimeters halves Use 4x h-in balsa stabilizer tips Glue pre-shaped triangular 4-instock ribs Remove halves relieve 46-in sheet spruce spars large Klett hinges loose pins Finish opposite side previous steps sand fin ished stabilizer shaping rounded lead ing edge sharper trailing edge elevator Install large Klett hinges slow-setting CyA using piece 032 music wire least 25 long keep hinges aligned other Add balsa block filler between lower upper center ribs stabilizer decide stab will removable see fuselage construction text Add A-in balsa pieces top bot tom elevator hinge line Tap elevator horn screws harden holes CyA Join two sections 032 wire round spruce leading edge elevator 1 travel direction Build fin rudder same man ner stabilizer elevator Note fins spruce spars extend down approxi mately 2 below F2 mate former F Add 3/ music wire arm rudder allow actuated inside fuse lage arm bent cut accept Du-Bro aileron ball link rudder must swing 300 deflection either direction former F has notched allow full left throw full throw elevator wire can withdrawn screwdriver blade inserted tail cone open metal clevis stabilizer unbolted Left An overhead shot rudder deflected left stab has removed reveal Du-Bro metal clevis used connect el evator horn within hollowed-out tail cone Right left spoiler fully raised show spring retainer small control horn Its good idea place name ad dress model case should ever fly away Also AMA Safety Code re quires model identified either name address AMA number S Fuselage Begin box sides trimming joining 1/16 balsa sheet /16 ply over outline wax-paper-covered plan Use ply B2 D proceed aft /16 balsa lightest weight making sure grain running vertically Glue /8 x A-in spruce strips perime ter section Remove wax paper complete right side Fill space between spruce longe rons B2 D %-in Lite Ply shape F2 Using Formula II epoxy Y32 ply pieces PL PR spruce strips parts touch Lite Ply spruce except lower longeron area aft former D cured carefully align tape two sections together drill %-in hole main tube 3146-in holes rear incidence spoiler tubes Separate two sections drill re spective Y6-in aileron cable holes Route out openings screw eyes Drill through Cl D elevator cable tube separate drill rudder cable tube hole D spoiler tube holes Cl Mark inside surface two fuse lage box sides x A-in spruce dou blers leaving gaps B2 Cl stopping D Cut strips glue inside noting bottom strips raised 42 allow later addition box floor Glue B2 Cl D using right trian gles check squareness formers side sides building board satisfied clamp sides gether Epoxy doubler tripler cut x %-in spruce flush top Cl glue x A-in spruce joints aft B2 either side Cl forward D tripling area top Cl will allow surface secure %-in brass tube epoxy brass tubes until satisfied wing aligmuent Wings should easily slip both main rod A2in drill rod tempered Rockwell C-Scale 42-45 incidence setting rod use incidence tube hole neces sary Brush Formula II add medium-weight glass cloth over both tubes contacting respective formers box sides Cut rectangle %2-in ply servo tray aft B2 cutouts servos switch harness rest box floor will formed 3A2-in balsa grain running side side used small piece 3A2-in ply cut out aileron servo aft Cl continued %2-in balsa E Flip box over mark centerline bottom B2 D Glue square strips /6 balsa either side line corresponding A-in thickness keel Trial fit Lite Ply keel servos place eye toward routing wires airborne system Make cutouts now left 3-in gap floor aft ply tray no apparent loss strength battery goes behind former 12 Ab pack recommended Trim keel pack leaving some space foam also After B 1 cut trace duplicate balsa ply use forward canopy tray Also trace one-piece copy former %2-in aircraft ply Make up A-in balsa ply pieces epoxied together right gles secret gentle heating epoxy heat gun flows will spread thinly over sheet Cut out turtledeck formers Tl through T3 A-in balsa T4 cut Lite Ply Notching should done after theyre glued place should already have decided point subject stringernosed sheeted area tar fledeck sheeted Trim formers areas allow sheet planking material Steady box bench slip wings rods checking fit PL PR Use straightedges keep sides square use pins board keep PL PR flush root ribs Bend sides together aft E Cut former E A-in balsa glue after drilling cable tubes Glue T4 F aligning center F points equidistant wing trail ing edges Mount fin platform F2 true fin right triangle Set fin aside epoxy F2 T4 F Stab mount S should epoxied now Line stab up hinge line right angle fuselage centerline tack glue S Drill two holes A-in nylon mounting bolts through balsa block stab S Counter sink balsa allow bolt heads sit flush top stab Lubricating bolts Vaseline put through stab snug up nuts satisfied stabs alignment run bead slow-cure CyA around nut February 1988 35 U author assembles Schweizer beginning two blistering 100 contest days first certainly last SOAR Scale Uprising Photo Dave Haertel Jack Hiner launches model author can concentratIon grabbing lots altitude Using helper launch lathe best way handle Sailpianes size Mike Macintyre plc Designed Ken Willard eamater 4 ON-Board Battery Tester Saves Time. Saves Models Install RC Models Check receiver battery status press button Small Light /2 oz Precise Rugged RX-1ORDER TODAY $1495at dealer Protune Corp 914 462-6452 USAP 0 Box 1808 Poughkeepsie NY 12601 U rims touch underside mount Glue scrap standing tail ends PL PR away gentle bend fit selage sides flush root ribs Glue A-in spruce dowel PL PR ap proximately F Install tubes elevator aile ron servo cables securing form ers epoxy small patch medium-weight glass cloth critical keeping tubes bending pop ping away formers under fight loads What can get away small Gliders woefully inadequate quarterscale models Notch turtledeck formers receive % x A-in spruce longerons Round top edges longerons prior gluing Make up keel epoxy %-in ply inserts receive brass wood screws used mounting skid Glue keel key piece A6-in balsa strips touches B 1 B2 B3 Glue former halves B3 C2 Laminate keel 2 ply either side skid mounting area save weight used 3-in ultralight wheel JoZ Products well liner %2-in balsa wetted slightly allow bend Glue glue %-in triangular balsa gussets brace keel After rounding outer edges glue first two horizontal ply nose formers will simu late tubing B2 after rounding outer edges should able use two pieces -in balsa sheet per side plank between B3 C2 Glue doubler strips balsa keel flush b6ttom B3 C2 planking support same planking will touch PL PR After planldng add rest Lite Ply shapes 3 Glue Bi finish formers Bi Cut canopy trays carefully A-in balsa ply begin work front can opy fitting up balsa ply former prepared match Bi Shape rear bow tray laminating two pieces 46 bass about /16 wide over former Trial fit bow tray after notching two rear corners glue sat isfied rear tray reverse aft shape matching Ti ward shape laminated bass matching front bow Finish trays two coats Formula H epoxy paint flat gray epoxy enamel provides best surface gluing canopy Wil holds RC-56 Plan instrument panel pilota DGA quarter-scale bust what chose because its light weight 1-26 steel tube turnover structure under rear canopy used Sullivans outer sleeves simulate thisdrinking straws would work just well Cover glue joints canopies touch trays bows strips painted plastic simu late aluminum framework rear can opy clear acetate sheet Continued page 129 36 Model Aviation Flies off both land water Crisply die-cut balsa ito ply parts complete hardware eas sembly sensible engineeng Qlear plans p oto illustrated assembly manual 50K229 Complete Catalog $200 ordered direct add Han 16 W 19th St PO Box 511 E7 Higginsville MO N64037 call 816 584-7121 Safety/Preston Continued page 22 ter received Stasi Poulos Dallas TX recently helping newcomer RC fly ing soloed become quite confident ability lost almost fear about flying wind day watched him take off 15 mph steady headwind ascent beautiful could until turned downwind made decision throttle back since plane seemed pick up much speed downwind leg plane banked slightly tried correct bank ailerons horror hollered ailerons werent work ing Yet still throttle elevator control Convinced victim chanical radio failure handed threw transmitter regained control landed tried explain him what happened plane turned downwind its air speed did change its speed over ground did student felt plane passing him too fast solution throt tIe back failed realize did re duce speed plane passed him no real indication planes airspeed reduced airspeed until plane stalled Ailerons change lift aircrafts wings no lift can swing want youll never know difference student said No way plane wasnt moving slow What really saw however stalled plane moving air mass Stasis description incident makes wonder radios have sent off correction failures really didnt occur opinion appreciation visual effect wind models flight characteristics has direct bearing safely fly Have safe month watch out downwind turns Schweizer/Moskal Continued page 36 forward canopy molded piece plastic clamped frame heated oven drawn over wooden plug method has described times other articlesone best being Steve Gray March 1987 issue Model Builder would rather make canopy available ready-made Shabo Scale 2416 North 66th Wauwatosa WI 52213 Plan canopy hold-downsrubberbands mini ature hooks simplest lightest Route pair inner Nyrods PL PR spoiler servo glue Install airborne gear check ac tions correcting binding rubbjng Complete turtledeck structure add crossgrain floor Xe-in balsa E U Glue both halves F3 four A-in balsa lower main stringer standoffs Laminate lower main stringer two pieces A-in-sq spruce Glue stand off formers /6-in floor fuse lage glue stringer running keel G Glue 1/16 angular balsa gussets brace standoffs floor Add piece Y32-sq spruce doubling top longeron Tl tapering aft F Complete two lower stringers running C2 F3 aft F3 keel Form skid two pieces 1A x /2-in spruce laminating form made common nails board Drill skid screw attach points re move cover glass cloth paint match scheme Some 1-26 aircraft fabric fairing cover gap between skid fuselage quite often no fair ing used tail nose cone built up balsa Shape tail cone A-in core Lite Ply hold shape ply core doubled A-in balsa carved correct taper Tack-glue fuselage check maximum travel elevator horn will later glued after painting covering carefully drilled center nose cone after shaping soft balsa %2-in ply disc matches former 4-40 hex head bolt eased piece -in brass tube used bushing created N shape 3A2-in ply would slip behind drilled 4-40 blind mounting nut holds nose cone place bolt tight ened access hole 4-40 bolt serves scale air vent common 1-26 nose cones battery pack way also has advantage being acces sible acts balancing weight STICKY BUSINESS NOW AVAILABLE ON VHS VIDEO ADHESIVEUU Frank Tiano Producer Bob Violett nician ira KEEP YOU OWED TO YOUR SEAT Contains everything want know about Zap Loctite adhesive product informative Humorous 2 hours two intermissions ideal club meetings Produced Frank Tiano Techniques Frank Tiano Bob Viotett NOW AVAILABLE FOR SHOWING $3495 Plus $2 Shipping & Handling Name CityState __________ Zip Send $3695 $3495 plus $2 shipping & handling check money order Frank Tiano Enterprises 2460 SW 85 Terrace Davie FL 33324 Allow 4-6 weeks delivery Sorry cannot deliver post office boxes MA February 1988 129 WORLD CLASS tA Retr *6 Tony Frackowiaks Challenge IV Kit Atlanta KitDash Kit Hattori Headers Pipes AMA&FAIRC Aerobatic Specialties PO Box 388914-248-8603 Lincoindale NY 10540 Send $100 catalog FIBERGLASS PARTS Over 237 cowls kit scratch built models Also over 34 round cowls ranging 4 14-718 diameter 55 duff size & shape wheel pants custom Make Parts Vacuum Form Canopies Pining send $1 unqist kt TAD FIBERILASS SPECIALTIES 30925 nlock Dept 4 Garden city Ml 48135 PHONE 313421-6358 BRAZED & HEAI-TREAIED WIRE GEARS & CABANES PHONE 313 261-9064 experience Great Performance Quartet DALOTEL 850 SPAN 69 ins WING AREA 830 sq ins CHIPMUNK 850 SPAN 70 ins WING AREA 850 sq ins SPAN 76 SPAN 72 ins EXTRA 230 WING AREA 900 sq ins ZLIN 526 WING AREA 900 sq ins 4 ALL BALSA ARFS AT ONE GREAT PRICE HOLIDAY SPECIAL $185 ea available direct select hobby shops c ZIMPRO MARKETING nose cone assembly glassed 2-oz cloth covered coat Formula II epoxy filled Model Magic Filler Now time plan unique details particular subject prior covering youve ever covered rubber-powered model silkspan-and-dope ap proach fuselage same except youll no doubt want use heat-shrink covering did easiest way cover stringered nose cut triangular section oversize starting top keel work downwards section sectionone large piece wont work rest fuselage can done three segments stringered turtledeck first left right sides down centerline Before covering glue inspection fair ing balsa rudder horn provide ac cess linkage needed scale inspection cover balsa circle covered MonoKote tack-glued fair ing after final covering Mount gear including main tail wheel Perfect -in balance model indi cated safe point Install radio fly ing surfaces check action controls rudder should have maxi mum 300 deflection either way ele vator should need /2-in maximum throw up down ailerons should have minimum differential 31that three up down spoilers need maximum throw 450 extremely effective fully open Epoxy fin F F2 after fuselage covered connect linkage glue inspec tion hatch Balancing mean aerodynamic chord MAC calculation see Brad Powers arti cle Model Aviation May 1980 has al ways resulted proper balance Sailplanes Ive calculated 1-26 MAC 12y6 translates 30% MAC measured root rib safe balance point model experience previ ous mid-winged Glider bridle launch very safe rings falls off mid-launch allows maxi mum rotation launch Balance plane prior covering adding weight far READY TO FLY Call 1-800-45-TO FLY *LOW PRICES *EASY TO ASSEMBLE *NO BUILDING *NO PAINTING Piper Cherokee-40$13099 Piper Cherokee-259599 Fokker E111-4010799 Fancy Stick-256599 Cessna 172-208999 engine included Eh SUNSHINE HOBBY 17721 South Western Avenue Gardens California 90247 forward possible minimize all-up weight care selection materi als use glues should result un covered airframe balancing 30% mean aerodynamic chord case prototype Covering marking used Super MonoKote because desire keep things light MonoKote trim sheets large letters Duplicating national signia made easy using Sigs stickon decalsluckily smaller size sheet perfect scale smaller mili tary nomenclature letters no push lift etc vinyl rub-ons After some experimentation found work best rubbed onto small section Mono Kote placed position cov ered wax paper sealed iron low temperature slightly below EconoKote range Youll note red flash running nose tail stock red K&B Superpoxy paint sprayed MonoKote after wiping clean ac etone masking pattern Install steel shoulder hook hardware store root about lage sides Remove hooks harden tapped hole CyA hooks will removable display judging Install main wheel cutting small hole Mono Kote side opposite axle hole Slip brass tube axle securing dab epoxy Now patch MonoKote Make up bridle least l00-lb-test braided nylon choose partner ex perience launching large Sailplanes Have him hold model left hand cupped front left leading edge right hand about T3 fuse first flights launch straight forward after gaining flying speed rotate gently up Radio Technique/Myers Continued page 39 Electronics Inc PO Box 996 Hauppauge NY 11788 telephone 516 265-1325 came neatest things Ive seen years wit Multicore Tip Tinner/Cleaner TTC 1 See photoContinued page 132 -Also Am0NCL Li6B/cHAI 84 fl SPAN VULT BT-13 VALIANT 84 IN SPAN ROLLED PlAN SE-- $20 ELCH FThERGIASS CC7JIS--------- *20 EkCH ADD 12oSHPflfGNYS ADD 8TAZ 130 Model Aviation PO BOX 3076 OAK RIDGE TN 37830 PHONE 61 5482-61 88 AERaTCLL3~/l\ FLYING iA SCAlE SPORT SCAlE AERONCA L3/EFNDEE105 IN 2 CYClE 90-13 II 4 CYClE 12-18 AERO PlANS N PARTS PO BOX 939 OIEAR NY 14760 1 372