Sweepee

NO OCR TEXT NO OCR TEXT better reviewing old model air plane magazines An article Don Sobbe describing behavior forward-sweptwing model airplanes immediately piqued interest concept sounded new original wanted see myself prototype used simple box struc ture fuselage flying buddy Steve quite adventurer comes model airplaneshell build anything thats either big differentsaw its maiden flight decided wanted build too intrigued models individuality too bland satisfy him So sat down sketched out fanLeft Sweepee shown structurally complete photo shows overall construction assembly airplane optional turtledeck canopy stabilizer permanently joined fuselage wing held place plastic bolt Right computergenerated image Sweepee done Aries Concept Station during design phase model system makes visualization modifications seem easy pressing few buttons keyboard model can viewed position considerable realism 26 Model Aviation view tail section showing rudder pushrod exit tail skid tail skid part original design stalled afterthought order protect rudder scuff damage attempt ing execute high-angle-of-attack landings / K top wing center section showing ai leron servo control assembly installed lineup Sweepees representing three variations tarthest trom camera employs Talon wing third line example simple no frill box-type version two front jazzed-up versions optional canopies turtledecks installed servo battery pack shown position center-of-gravity may adjusted sim ply repositioning battery pack slightly fore aft order achieve optimum balance NO OCR TEXT cier version Sweepee few lines Steve always puts plans present both options major difference being turtledeck adorns deluxe edition less fas tidious Steve just want have fun flying forward-swept wings can build basic fuselage turtledeck Theres no noticeable difference perform ance between two versions varia VIA IfR BAL LEADING EC NBJSIC WIRE JOINE STEERING ARM I_ I/B BALSA SHEET DOG AL ER SHA BALSA SHEET FUSELAGE TOP IS BALSA DOUBER/5 1A PLYHOOU 3/IA BALSAI SHEET SIDESjjJ/ I/B BALSAI SHEET BOTSECT A-AV-U ENDS ___________HOSE U-I/4 DIG CBROYAL 40LWBALSA SPINNERENGINE SI*IWNVH BALSASHEET TRI-SIOCKDELLER F-I II I I IA - MOTOR MOUNTA RIO STEERINGSTAB CUTOUT AT ARMI/1A POSITIVE lUCID 0 DIG NOSE WHEEL tion turtledeck seems fly just bit gracefully suspect thats effect physical appe&ance its lateral area Take pick plane flies just like other sport model normal flying attitudes has high level control has good roll pitch up-down control little sen sitive usual conventional model will sport maneuvers loops rolls combinations real differences between Swee pee conventional models dont show up until slow airplane down increase angle attack wings point model can easily fall almost zero forward speed often ex periment cutting throttle down lit tle above idle observe effects forward sweep Sometimes model will just hang zombielike though knowing go favorite maneuver what call instant turnaround zero radius turn bring plane screaming cut throttle bleed off speed using 28 Model Aviation Stabilizer construction using two sheets 0 a NOiC marungs sheet Partially finished sandwich construction 5tb showing internal stitteners sia. completely formed elevator control rod brass control horn soldered place Full-Size Plans AvailableSee Page 170 1/8 1 BALSA RIB STRUCTURE VRxl BALSA TE STABILIZER CROSS SECTION W BALSA SHEET SELAGE SISES V4 BALSA SHEET__________ ELEVATOR i7i7 LER___ -/ 1V6 BALSA SHEETINST7 \ FOR WHO BOTTOM-\-4--/----I FLATTENE WINS------ BRASS TUE -HORN FUSELAGE TOP VIEW IVIA SW MUSIC I/H BALSA LINER TRI-OTOCKTURTLESECH ]OJTLINEKI Ib-i ELEVATOR ____ I/HBALSA SHEET _________/B BALSA SHEET SOUBLER 1rIII__IAF7tV~/ rI-ui=--i11111Iii —RASSER HORN P3 I II/iji /ij WINS HOLD OVEET SIDESAREA nOPY /16 BALSASERVOIIIOOWNBLOCB I/4 BALSAI/B PLYWOODIIl/ I/H BALSATRI-STOCEVR PLYWOODI/ SHEETI/H BALSA SHEET TOP ri $l~711iI/easisAS/SD BALSA ISHEET 1A BALSA SHEET ISHEET SIDES 1-IlII E2IIFUSELADE TSP iiiiflhi i ______ ___OPTIONALSECTS-VSECTRR _________TURTLEDECK FORUERS F-SI/H BALSAF-4Li SECT C-CDOUBLERLB PLOSECT E-EF-SD 1/4 BALSAPUOBROOS F-HA Ii K I/H BALSA SHEET MAPLE H BALSA SHEET iP~ SERVO MOUNTSDOUBLER F5A CONTROL HORN / --ERUODEE P/H EU ABAIIS/H/EDIT-LEFT TRI STOCK I/H BALSA SHEETPLYDOWELSSH SERVOBLOCKWINO HSLD I/H5/16MAPLESIDE SHEET CROSS DRAINVABALSALOMINUMSOWN BOLT DOUBLERMAIN DEARFUSELESt IS SHEETED WITH S/A BALSA SHEETyR BALSA SHEET FULML SIDE VI 0NOT S/OWN FOR CLARITYCROSS DRAIN 5IOSH5B S I/H SIA MAIN WHEELS______________________________ I/HWIDE-SPRIND STEEL DA PLY SHEET OF 2 AVIATION SWEEP EE ING BY E OUARCO IALL RIONTS RESERVED gradually increasing amount up control Applying slightest amount left rudder causes plane turn yaw about itself vertical axis Gradually correcting turn applying increased throttle lit tle down elevator complete turn head away again Landings can lot fun too can vary little time person ally prefer what Steve calls hover land ings bring plane down about 100 ft altitude cut throttle apply ever-increasing amount up control maintain about 150 nose-up attitude speed drops off plane begins sink quite rapidly about same speed its forward velocity Just before contact ing ground apply little throttle slow descent gain little forward speed light touchdown Left 3AB sheet fuselage sides 1/8-in sheet doublers shown cut out trimmed final shape Right view forward end fuselage sides shows details Slot stabilizer Note Small groove cut rear slot elevator control rod August 1989 29 __________ s / W7 ____-7 4_A-- 7Z31/RI BALSA TFRAME B BIB STRUCTURE TYPICAL HINGE LOC AT ION /HHSPY-HOLLDWEE ALSA BLOCK ALSA -ELEV SUPPORT 3/IA 3/B SPANS TO 3/B 7/8 BALSA LEAfING EDGEBOTTOM SEE RIB VIEWS FOR SHAPE LEFT WING PLAN TOP VIEW ___ _________SW BALSA CENTER SECTION SHEETING 1/4V16 BALSA CAP STRIPS TOP SREET1NG TOP AND BOTTOM ____1/2 BALSA SHEET AILERONS I/IA PLYWOOD I/IA B 3/H 7/B LE TAPEF SAND AS BALSA BLSCR-SHAP TO MATCH PUSELAGE--S/IA 3/B BALSA SPANS TOP AND BOTTOM 3/32BALSA SHEET NIBSIN VERTICAL GRAIN BALSA WEBBING BET NIBS IR-2NTH-AH-SN AH-SH-BH-VH-IS RAI 74__—1/_ 3/B 1/2 BALSA T ENOTE DIHEDRAL IS I/1A PLTWODISAND TO SHAPE UNDER EACH TIP COT REND AT__________________________________________________________ CENTERLINE _____/ RIGHT WING PLAN TOP VIEW TYPICAL HINGE INOTE WING SHEETING B CAP STRIPS OMITTED FOR CLARITY LOCGTION 3-Il/IA AILEHON LINKRIGHT SlOE IS 0123HSA I I truction Though building Swee pee relatively straightforward overall few things must done lit tle differently Some steps stabilizer con struction intertwined construction fuselage vice versa exam ple elevator control must mounted before fuselage fully sheeted Use whatever type glue prefer use Jet brand medium-viscosity cya noacrylate glue CyA nearly building relying epoxy occasionally think necessary Stabilizer Cut two sheets /16 balsa outline stabilizer plans sheets trace positions A-in sheet internal stiffeners Pin marked balsa sheet onto building board build directly upon using 1-in-wide strips A-in sheet Add tips A-in sheet center section Add top sheeting sure glue top sheeting edges stiffeners center section important since canards Sweepees stab accounts greater percentage total weight airplane conven tional designs Cut two elevator halves A-in balsa sheet Sand taper shown typical stab cross section plans Drill /6-dia hole elevator half connecting wire attaches Bend /16 stainless steel wire Ushape shown plans Flatten out Left slotted fuselage doublers installed match side slots Right Fuselage sides formers doubled ready assembly 30 Model Aviation Full-Size Plans AvailableSee Page 170 VIA BALSA LEADING EDGE SHEETING TOP AND BOTTOM I/O BALSA SHEET SEE H-I FOB SHAPE 3/3D MUSIC WIRE AILERON LINK NOTE ALL WING RIBS ARE 3/32 BALSA SHEET I/O BALSA SHEET SHAPE AS SHOWN 3/H V2 BALSA SHAPE AS SHOWN LOB 1/4 BALSA CAP STRIPS TOP B BOTTOM ALSA TE TOP iIZiD SHEET 2 OF 2 MODEL AVIATION SWEEPEE DESIGNED BY SAN JAY DHALL TRACING BY JOE DEMARCO IALL AUNTS RESFAVIB in brass tube cut file shape shown fuselage side view Drill two 1A6-dia holes tube per plans Slide U-shaped control wire through holes control horn making sure horn exact center wire Rest wire flat board holding control horn vertical sol der joint between two Sand wire joint before soldering ensure solid connection Make small notch centerline trailing edge stab brass control horn can move freely assem bled Sand stab edges around nice rounded section shown plan stab cross section Bevel round trail ing edge Fuselage Cut out fuselage sides Y6-in sheet balsa Cut out two side dou blers nose area wing saddle A-in sheet Note /6-sq notch aft end slot seating elevator control wire Add -in triangular strips edges fuselage up trailing edge wing saddle Cut out former Fl -in ply Laminating two A-in ply sheets will work just well Drill three holesone throttle pushrod two fuel hoses Cut slot nose gear pushrod shown plan Cut out former F2 A-in ply Note glued position former doesnt extend way bottom fuselage terminates near trailing edge stab Cut former F3 A-in balsa Cut formers F4 F4A A-in ply Glue together drill 34-in-dia hole wing dowel Cut out F5 F5A A-in sheet ply Glue together bevel side edges angle match fuselage contour assembled Bevel inner sides fuselage extreme rear edge two sides will join sand area down Glue August 1989 31 Partially assembled fuselage shown formers place pushrod tubes installed 1 ne partiaiiy completed front end fuselage showing elevator control rod installed Left The elevator control complete pushrod clevis locked place Right stabilizer being slipped position its Slot Left The underside partially completed fuselage showing plywood main gear mounting base stabilizer nose gear mount place Right first two formers turtledeck Installed planked fuselage fin main gear stab place Left The turtledeck well under way spine place top formers Right Wing ribs cut out arranged ready assembly Left Wings under construction plans webbing lower spar place Right Wing construction showing webbing grain direction two fuselage sides formers F3 F4 Glue formers F2 Fl place Joining two sides tail bent quite sharply will require some patience little time wet rag First chisel out 1A-in wing doubler aft former F5 almost /32 Wet outer surfaces fuselage sides letting sit about minute Begin gradually bending fuse lage sides bringing together little time Press sides together little time gradually release Re peat procedure until two ends fuselage join up nicely Glue joint liber ally wood reasonably dry worst now behind us Add 1A-in triangular balsa stock edges havent yet done joint tween fuselage firewall former Fl Plank top fuselage Y16-in sheet balsa between F2 tail end being sure grain runs length wise Use rough sanding block remove excess balsa top planking Cut out hatch fuel tank chamber 3A6-in balsa Sand shape dont glue Glue Y8-in hardwood servo tray blocks Slide U-shaped elevator control wire through cutout stab place 1/16 groove rear end cutout Insert stabilizer through slot control wire already its groove difficulty encountered pushing stab through slots enlarge slightly Push stab clear through align symmetrically about centerline Glue joints between stab leading edge former Fl trailing edge former F2 slots careful glue control wire stabmove few times make sure its completely free Insert outer tubes flex pushrods Measure distance front servo tray trailing edge stab Cut outer flex tube about inch short Rough sand tubes will attach fuselage formers Cut another tube extend front servo tray 1 /2 past firewall third tube goes servo tray nose gear slot firewall Slide tubes through holes formers glue place Cut pushrod tube elevator con trol few inches longer outer tubes Slide through tube screw 2-56 threaded wire mount clevis front end Attach clevis brass control horn double-checking joint secure Slip piece 14-in sil icone tubing over clevis keep opening use Glue %-in balsa block fuselage sides directly over contact el evator pushrod shown plans prevent flexing undesirable downward position servos may mounted point procedure ing described later Sheet bottom fuselage Start cutting out two pieces -in ply main gear will eventually mounted Position aluminum undercar riage over two sheets drill 32 Model Aviation Left Close-up view leading edge center section reinforcing block Right structurally complete wing halves shown joined together Left The bottom wing center section shown partially planked Note cutout center ribs upper planking aileron servo Right formed aileron links rolled paper tubes Brass tubes can also used must installed before wire bent screw holes Mount 6-32 blind nuts above smaller piece glue place glue second piece shown plans Plank bottom using -in balsa sheet Note grain planking runs across width fuselage Cut piece A-in ply install rearmost tip fuselage will used mount tail skid Sheet rest fuselage between former F5 ply sheet entire bottom fuselage sheeted construction technique diverges somewhat depending whether youre building version tur tledeck youre building basic ver sion square-box fuselage ready addition fin rudder Cut out parts A-in sheet balsa Sand fin cross section similar stab taper rudder Glue fin place add A-in triangular stock sides along entire length joint Glue thoroughly fancier model turtledeck glue fin fuselage above dont add A-in triangular stock Cut out formers FT 1 FT2 FT3 A-in balsa Mount FT3 directly front fin Glue FT1 FT2 place top sheeting fuselage Cut 22Y4-in-long strip A-in sheet balsa tapering 34 /l6 Po sition glue strip over formers FT1 FT2 FT3 sanding blend August 1989 33 structurally complete wings ready final covering aileron installation contour three formers wrap around formers Cut two sheets %2-in balsa A-in strip spine glue place sides turtledeck Dampen outer Add balsa blocks side fin sides two sheets using wet rag match turtledeck Sand blocks Stores Four Aircraft Setups Includes Seven Different Servo Configurations Individual Surface Travel Limits Centering Single Switch Presets Launch Speed Modes Full Trailing Edge Control Enhanced Mixing Functions Crow Landing Capability * User Selectable Cross Trim Capability * Flap Stick Reversing ator Camber VTR * Automatic Selection High Au Rudder Mixing Launch Landing Modes * New Feature Fully installed kit Control Systems Laboratories 238 5 Hillview Dr Milpitas CA 95035 408 946-4142 Aiaronk~ Modute 75P registered trademarks Airtmnim Inc NEW FEATURES ADDED! STMElevator Advanced TeehnoIoy Radio control SystemCamber % Works standard FM/PPM Receivers Airtronics PCM Receivers Converts Module 75P advanced computerized control system IVTRl05/v77 I/72// o 070 100 Elevator Stick Position % %2-in planking cross sections shown plans Carve out balsa block canopyor might want use plastic canopy can find match cross section Glue canopy front turtledeck sanding fitting till its flush Drill four holes firewall attach engine mount Sand round off fuselage corners cross sections shown plans Epoxy fuel tank chamber fuel-proof Epoxy firewall inner sides fuselage front Drill top bottom engine mount serve mounting block nose gear Glue hardwood block receives wing-mounting bolt dont drill bolt point Cut slots install hinges stab elevator halves sert hinges attach elevator stab Wing Cut two sets wing ribs Ri RiO 4 %2-in sheet balsa Pin down /6 x %-in balsa main spar directly over plans right wing Mount lightly glue ribs R2 through RiO bottom main spar leading edge grooves spars trailing edge must bev eled about 200 edges line up correctly leading edge spars trailing edge achieve correct angle forward sweep Cut out balsa webbings -in sheet two webbings size correspond ing positions right left wing webbing goes between spars grain must vertical vertical dimen sion webbing rib can mea sured rib patterns plans slight taper though insignificant critical webs extend toward wing tip webbing between ribs Rl R2 must angled rib Ri may tilted slightly achieve 1 /2in dihedral under wing tip Mount rib Rl appropriate angle Glue top spar push place rests rib slots over web bings Glue spar ribs web bings Cut out leading trailing edges %-in sheet balsa Note both slightly tapered leading edge must tapered 7/ root rib 3/4 tip ribs trailing edge tapers /16 tip ribs Rest leading edge sanded shape yet four five pieces scrap balsa building board align ribs should positioned leading trailing edges same height rib will help ensure warpfree wing Glue leading trailing edges place Reinforce joints dry lift wing off board Glue i-in-wide sheets /16 balsa top bottom trailing edge shown plans Glue 3-in-wide /16 planking between 34 Model Aviation IT-i TRANSMITTER TRAY * Recommended especially handicaps beginners.experienced pilots love also * Pays itself times over airplanes saved With set Gimbal Extenders $350 Postage & Handling Make Flying Breeze BJ ENTERPRISES 1100 Center Street e Montana 59501 TO ORDER CALL 1406 265-4828 Cost ecuna Rngtri pviisn rnsrrea Socket cop screws Inciudec DRILLED AND TAPPED FOR #JT20Os MAX FS 6OO #JT-4DUndrltled 2040 0 UPRIGNTOrIN #JT41lIP VT 211000 ENGINE #J1-42ENVA 35-40401000 jvaoi iq-As1950 #JT-43SAITO FA 40-451000 Jr-001 40-002050 #JT44OS MAX FS 401000 jr 75-132260 #JT45SAITO FA 404510 00 #JT-46ENYA464C1000 #JT-49HPVTA91200 #JT60Undrllled 6090 1100 UPRIGNT/NIDI DNa #JT-61OS MAX FA 611300 #JT62OS MAX PS 60-75-901100 51-9087573 2260 #JT-64ENYA 60-80-90-129 401300 #JT-66SAITO FA 651300 #JT120 Undrilled 1201600 #JT-121ENYAR I2OFC2000 #JT122 OS MAX PS 1202000 INVERTED #JT-123 SAITO PA 1202000 #JT-125 Super Tigre 25-3000 sr-ssais-u2260 available hobby shop ORDER DIRECT far return UPS shipment n tolone Co UNIVERSAL IN-COWL AIRCRAFT MUFFLERS 19-4045-6075-1 3 engines Most versatile mufflers ever offered Designed fit inside cowls limited space can also used HELICOPTERS BOATS UPRIGHT INVERTED SIDE mounted engines Exhaust tubes point almost direction Worm drive clamp universal mounting -an bolted directly engine INCLUDES EsSaust pipe eeteraa alIt darapI warn dine pianO mottle erenent pOle gasket ana reaurteig screws GIANT ENGINE MUFFLERS Molcted engine Toil pipe extensIons ond mountIng baits mckjded Also available tar ATlAS 46 BULLY COBRA KAWASAKI KIORIT SACH-DOMLER SUPER TIGRE 2500-3000 JT-Q3A QUADRA 35 Jr Z34 ZENOASI 0382750 Jr 954 ALmC 190 2760 51-035 QUADRA 3551-030 ZENQAII 038 Jr-zSuZENOASI 0382760 51-MONMA3530 2760 SIC f51060 08JaDRA60/~ lapariSTAN sngC V2750 IU050 urmieerENGINE ...0....J TPEA 51-403 19 451960I 51-60248-602960SIDE MOUNT MUFFLERS 51-90375-IS2260 ~ PITIS CAP 21 CESSNA 150 etc -403 45602198 -60345-002060MARPeaseaddsSSfsruPs 90375-2260hacKMOVISAMcsrcoOtess Add B50 025r8 tpt con FREE CA TALOG ENGINE TESTING STANDS cast Aluminum l rassreena Na Jr 0S2 GOnt Aal 2A te 25 2995 U 295 leading edge main spars top bottom Build other half wing following same general procedure Sand off ex cess planking center section Join two wing halves together rib Ri Cut out slots wing servo joined Rl ribs Sheet center section between ribs Ri R2 both sides wing top bottom 1/16 sheet balsa Cut opening top planking aileron servo di rectly over slots ribs R 1 servo rails consist two l-in-long %-in wide strips A-in ply positioned front back ends opening Keeping ribs centered glue /j x A-in cap strips over remaining ribs top bottom spar trailing edge Cut wing tip blocks -in balsa using outer wing cross section rib RiO pattern Two laminations %-in sheeting will work just well Glue tip blocks wing tips Glue triangular wedge block front leading edge joint center section leading edge center wing flush fuselage former F4 Add another block underside wing front center section shape bottom wing will eventu ally blend bottom fuselage Slick isnt Make up two aileron links %2-in spring steel wire Bend wire di mensions shown plans Note wire bent planes congruent right gles two links should mirror images another wish make aileron link tubes out paper take smooth sheet paper cut out two rectangular pieces 3 wide 1 long Carefully roll sheet pa per around middle section wire wide side parallel length aileron wire Let paper unfurl Roll paper turn apply bead glue along entire width paper Roll turn apply thin layer glue over entire sheet roll up completely Use brass tubes prefer remember slip wire before bending Cut grooves seat aileron links trailing edge wing towards center section shown plans Glue pa per brass tubes place taking care keep glue away moving wire Cut two trailing edge blocks -in sheet balsa 1 Cut grooves trailing edge block will seat well against aileron link tubes Make certain aileron wires move about 300 direction sure cut slots top surface wing wire exits allow free movement Follow same procedure trailing edge blocks glue place Sand leading edge wing match contours rib patterns Al Radio South Batteries 500 ma Pack 48V1300 Futaba conn1550 800 ma Pack 48V2200 Futaba conn2475 1200 ma Pack 48V2400 Futaba conn2700 TX batt Futaba G-SerieB PCM2995 Orders COD e VISA MC American Express subject change notice OPEN 8-5 CST904 478-6745 9003 N Davis Hwy Pensacola FL 32514 J August 1989 35 RADIO SOUTH KiCTh AUTHORIZED SERVICE CENTER Cali Tony Stiliman Ken Dudley custom work competition needs stock complete hobby line specializing competition accessorIesall discounted prices 0 _______ FREQUENCY CONVERSiONS gAgP._ MACommittee Approved ____________fR2&i1 ___________ • 0.1L%6•We stock Futaba JR radios Featuring fast service ngines parts qualified people t ri heBders pipes latest equipmeut including Repair Heli Sets Gyros SPECTRUM ANA YZER experience Great Performance Quartet x DALOTEL 850 SPAN 69 Ins WING AREA 830 sq ins dL SPAN 76 EXTRA 230 WING AREA 900 sq ins ZLIN 526 SPAN 72 ins WING AREA 900 sq ins series Sport Scale Balsa ARF Airplanes 120-4 cycle equivalent motors available direct select hobby shops RO MARKETINO bottom center section must kept flat width fuselage top surface may sanded completely Sand trailing edge blocks match con tour ribs Taper nice edge about %2 thick Sand wing tips pleasing round contour trailing edge must beveled shown rib cross section Cut ailerons length 1 / x -in sheet balsa taper trail ing edge about Y32 Cut out piece shape shown plan wing center section serve protective surface wing bolt tightened down later Drill A-in hole retain ing bolt making sure hole perpen dicular surface Holding fuselage inverted place wing fuselage wing saddle Drill hole hardwood block fuse lage using A-in hole wing guide Remove wing thread block using 4-20 tap Drill Y6-in hole leading edge center section block wing match hole former F4 sert Y6-in hardwood dowel glue Round off edges dowel Cut slots wings ailerons hinges Drill hole ailerons attach aileron control wire Use five-minute ep oxy glue hinges place youll need time properly position hinges Wipe away excess glue around hinges before dries wing now ready covering Covering Any iron-on covering suit able personal favorite Black Baron seems take compound curves better other materials Cover fuse lage stab wings separately Cover elevators rudder ailerons before glu ing hinges sure roughen up bonding surfaces hinges before glu ing Install rudder hinges Drill %2-in hole fiberglass engine mount nose gear wire shown plan Trial fit remove nose gear wire attach mount front former Fl using four 34-in-long 6-32 bolts blind nuts Drill hole bot tom sheeting fuselage nose gear wire must pass install nose gear thread gear wire through hole through steering linkage lower hole en gine mount Insert two %2-in wheel collars retain nose gear engine mount Push nose gear way through upper hole engine mount positioning least 46-in clearance between nose gear spring coil fu selage bottom Slide lower wheel collar sits flush mount tighten place Move second collar up flush mount tighten Position tighten nose gear steering arm angle shown plan Mount aluminum main gear four 6-32 bolts Install two 2A-in Du-Bro wheels main gear 2-in wheel nose gear Install clevis PRECISION MODEL PRODUCTS fl/i ifs Made USA BARSTOCK ALUMINUM SPINNERS Part NoSize 11-1508 . 11/2 11175B 3/4 TI200B TT225B .. 21/4 11-2268 .. 2-114 PAl . 11250-B .. 2-1/2 11251-B 1/2FAI .. TI275-B .. 23/4 TT-276-B . 2314 FAIl 00B 3 11-3018 3 PAl fl325B 3-1/4 11350B 1/2 11375B 4 11-400-B etailApprox PriceWeight $1395058 az 1495095oz 159510002 169516002 1895150oz 1895190oz 2095170oz 2295220oz 2495200oz 2695260oz 289525002 369534002 4995470 02 5995520 oz 6995570 oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $3 00 Per Spinner PROP NUT ADAPTORS V 0 Part NoSize 11-140-A -28 11-147-A1/4-28/7mm 11-610-A6 x 10mm 11-710-A7 x 1 0mm 11-516-A5/16-24 rI-518-A5/16-24/8mm 11-810-A8 x 10mm 11-825-AOx 125mm 11-375-A3/8-24 11-125-AlOx 125mm RetailApprox PriceWeighl $4 95 .061oz 495 061 oz 495063 oz 495 082 02 495 076 02 495.076oz 495 0 7602 49507502 59511702 595ll5oz 3 Pieces Nut Washer Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 36 Model Aviation CHIPMUNK 850 SPAN 70 ins WING AREA 850 sq ins PO BOX 3076 OAK RIDGE TN 37830 PHONE 615-4824188 Learn pros Top Flite Step-by-step MONOKOTKapplication details clear easy-to-follow full-color close up action Wings Fuselage Trims Color-on-color Designs Hinging Basic through advanced heat gun iron usage techniques tape approximately 1 hour MONOKOTI Basics Wings Tail Sections Fuselages Hinging Color Schemes Trimming MONOKOTI Il Advanced Color Schemes Designs Wing Tips Multi-Color Combos MORE MONOKOIK III Airframe Prep Advanced Wing Tips Hinging Color-on-Color Graphics Painting MORE MONOKOTE IV Wing Tips Canopy Covering Advanced Graphics Striping Car Bodies MORE MONOKOTI V Detailing Chrome Scale Tips Concave Surfaces Fragile Wing Tips MOREi COUISI ugA GREAT FOR CLUB MEETINGS RENT OR BUY $3995 $20 Refund per tape Rentals returned undamaged within 30 days Please specify 111111 IV V order SPECIAL PURCHASE ONLY COMBO OFFER Combination 2-hour long tapes Specify & II III & IV Only $65 Save $1490 Sorr no rentals available Combo tapes Send check MO Name Full Address choice VHS BETA format r TOP FLITE MODELS INC Monokote Video Course 2635 S Wabash Ave Chicago IL 60616 nose gear pushrod connect steering arm Any adjustments may made servo end pushrods stall three servos servo tray Drill hole left rear fuselage per plans angle allow rudder pushrod pass through Cut strip thin sheet metal wide bend drill make tail skid Mount /2A control horn side rudder shown plan Connect pushrods servos using standard Futaba servo disks Trim elevator pushrod size before connecting servo Position elevator pushrod bot tom surface elevator flush bottom stab neutral position Set throw elevator about /6 in either direction Mount aileron servo ensure have about % throw direction trailing edge ailerons canard elevator directional response opposite conventional model airplane other words nose plane pitch up elevator must move down nose move down elevator must move up havent already done drill two holes firewall fuel lines Mount Sullivan 8-oz flex tank Install Y6-in sheet hatch over fuel compart ment securing four small wood screws corners Mount engine fiberglass mount using 6-32 bolts Use 10 x 6 prop 40 size engine Follow manufacturers prop size recommenda tion larger engine Use 2 14-in CR spinner Cover receiver battery pack foam store wing saddle area fuselage Appropriately placing battery pack may thats necessary balance model indicated centerof-gravity Mount switch somewhere left side fuselage avoid exhaust spray Mount wing using A-20 plastic bolt Flying have patience wait perfect day set Sweepee sailing youre afire see flies weather isnt terrific let loose anyway Before launch model sure bal ance center-of-gravity indicated plan5 Y4 leading edge wing empty tank built plane according plans adding weight achieve balance point shouldnt neccesary need make adjustment relocating battery pack should sufficient Use center-of-gravity position first few flights Should feel need move center-of-gravity after shift small increments say /8 time respects Sweepee flies just like other model though does have few quirks remind of its maverick origins As youll probably observe no mat ter much up control use model Continued page 131 New Rocket Uses B C andD Engines. Capability No Else Offers MRCs recent introduction 25 Moonblaster inter mediate kit brings yet another technological advance MRCs Computer Aided Designs CAD built carry B4-2 C6-3 engines However Moonbiaster also commercially sold rocket kit includes easy-touse adapter also allows louse powerful Dengines Bulltto take blast Moonbiaster features large die-cut balsa fins blowmolded nose cone superb space capsule detailing Self stick decals 18chute Send free catalog See full line advanced MRC rockets hobby dealer cant help call us directly MRCG Model Rectifier Corporation 2500 woodbridge Ave Edison NJ 08817 1201 985-7800 August 1989 37 Letters Editor Continued page 11 Ni-Cds dont seem affected cold anything like alkaline cells Once problem corrected lit tle Nickle flew flawlessly greatest small three-channel airplanes have ever flown James Harris Marion OH Safety/Preston Continued page 22 fit inside muffler between bolt holes will stop two halves warping have done three G-38s havent problems mufflers coming loose Now respect firewall fire picture column builders Giant aircraft would use engine mounts made engines flat plates come would have air gap behind muffler cool ing gasoline engines run hot dont think put hand hot muffler like did five years ago Thanks have taken time write describe mishaps Without letters would no Safety column wish another safe month Sweepee/DhaII Continued page 37 wont take off until its ready airplanes slow speed flying characteristics indicated also peculiar com ing out near hover increase throttle gradually ease off elevator stick using little down control get some extra speed Try maneuvers safe al titudes beginning youre getting used airplanes foibles might also find need get acquainted its strange appearance air before attempt ing anything too fancy color scheme clearly distinguishes front plane back should come handy low throttle condition flight charac teristics model similar sport airplane until force high angle attack slow speeds gradually increas ing up control seems have little effect airplanes attitudebut does bring model virtual halt point sink rate will high probably will have keep rudder control active keep course However plane shows relatively little tendency stall out condition Im still exploring full range SAFE FLYING IS NO ACCIDENT airplanes flight characteristics Join search Discover Sweepee yourselfand happy backward flying Radio Technique/Myers Continued page 41 must wary transmitters 910 MHz 455 channels away Such transmitters MRS/PRS transmitters find strong signals S SlO5 115 125 135 145 565 575 585 595 605 have consider potential interferences xx5 shorthand code PRS channel 10 kHz above RC channel number given Channel 105 0 MHz Image example strong signal S und 72040 PRS 125 may interfere 5C455 receiver channel 125 RC58 summary find something scan ner note its frequency some mathemat ics see what found might problem Lesson #6 much stuff really inter ference looking signal 72xxx MHz has strength 55 nd can expect signal adjacent channel problem wideband receivers air Expert opinion says 55 al should investigated Try find Out what causing Wet insulators high-tension line might cause condition often clears up after sun burns off morning dew An S ignal should always answered ground range check before flight EVEN Continued page 134 August 1989 131 responding advertisers mention read about ModelAviation I

NO OCR TEXT NO OCR TEXT better reviewing old model air plane magazines An article Don Sobbe describing behavior forward-sweptwing model airplanes immediately piqued interest concept sounded new original wanted see myself prototype used simple box struc ture fuselage flying buddy Steve quite adventurer comes model airplaneshell build anything thats either big differentsaw its maiden flight decided wanted build too intrigued models individuality too bland satisfy him So sat down sketched out fanLeft Sweepee shown structurally complete photo shows overall construction assembly airplane optional turtledeck canopy stabilizer permanently joined fuselage wing held place plastic bolt Right computergenerated image Sweepee done Aries Concept Station during design phase model system makes visualization modifications seem easy pressing few buttons keyboard model can viewed position considerable realism 26 Model Aviation view tail section showing rudder pushrod exit tail skid tail skid part original design stalled afterthought order protect rudder scuff damage attempt ing execute high-angle-of-attack landings / K top wing center section showing ai leron servo control assembly installed lineup Sweepees representing three variations tarthest trom camera employs Talon wing third line example simple no frill box-type version two front jazzed-up versions optional canopies turtledecks installed servo battery pack shown position center-of-gravity may adjusted sim ply repositioning battery pack slightly fore aft order achieve optimum balance NO OCR TEXT cier version Sweepee few lines Steve always puts plans present both options major difference being turtledeck adorns deluxe edition less fas tidious Steve just want have fun flying forward-swept wings can build basic fuselage turtledeck Theres no noticeable difference perform ance between two versions varia VIA IfR BAL LEADING EC NBJSIC WIRE JOINE STEERING ARM I_ I/B BALSA SHEET DOG AL ER SHA BALSA SHEET FUSELAGE TOP IS BALSA DOUBER/5 1A PLYHOOU 3/IA BALSAI SHEET SIDESjjJ/ I/B BALSAI SHEET BOTSECT A-AV-U ENDS ___________HOSE U-I/4 DIG CBROYAL 40LWBALSA SPINNERENGINE SI*IWNVH BALSASHEET TRI-SIOCKDELLER F-I II I I IA - MOTOR MOUNTA RIO STEERINGSTAB CUTOUT AT ARMI/1A POSITIVE lUCID 0 DIG NOSE WHEEL tion turtledeck seems fly just bit gracefully suspect thats effect physical appe&ance its lateral area Take pick plane flies just like other sport model normal flying attitudes has high level control has good roll pitch up-down control little sen sitive usual conventional model will sport maneuvers loops rolls combinations real differences between Swee pee conventional models dont show up until slow airplane down increase angle attack wings point model can easily fall almost zero forward speed often ex periment cutting throttle down lit tle above idle observe effects forward sweep Sometimes model will just hang zombielike though knowing go favorite maneuver what call instant turnaround zero radius turn bring plane screaming cut throttle bleed off speed using 28 Model Aviation Stabilizer construction using two sheets 0 a NOiC marungs sheet Partially finished sandwich construction 5tb showing internal stitteners sia. completely formed elevator control rod brass control horn soldered place Full-Size Plans AvailableSee Page 170 1/8 1 BALSA RIB STRUCTURE VRxl BALSA TE STABILIZER CROSS SECTION W BALSA SHEET SELAGE SISES V4 BALSA SHEET__________ ELEVATOR i7i7 LER___ -/ 1V6 BALSA SHEETINST7 \ FOR WHO BOTTOM-\-4--/----I FLATTENE WINS------ BRASS TUE -HORN FUSELAGE TOP VIEW IVIA SW MUSIC I/H BALSA LINER TRI-OTOCKTURTLESECH ]OJTLINEKI Ib-i ELEVATOR ____ I/HBALSA SHEET _________/B BALSA SHEET SOUBLER 1rIII__IAF7tV~/ rI-ui=--i11111Iii —RASSER HORN P3 I II/iji /ij WINS HOLD OVEET SIDESAREA nOPY /16 BALSASERVOIIIOOWNBLOCB I/4 BALSAI/B PLYWOODIIl/ I/H BALSATRI-STOCEVR PLYWOODI/ SHEETI/H BALSA SHEET TOP ri $l~711iI/easisAS/SD BALSA ISHEET 1A BALSA SHEET ISHEET SIDES 1-IlII E2IIFUSELADE TSP iiiiflhi i ______ ___OPTIONALSECTS-VSECTRR _________TURTLEDECK FORUERS F-SI/H BALSAF-4Li SECT C-CDOUBLERLB PLOSECT E-EF-SD 1/4 BALSAPUOBROOS F-HA Ii K I/H BALSA SHEET MAPLE H BALSA SHEET iP~ SERVO MOUNTSDOUBLER F5A CONTROL HORN / --ERUODEE P/H EU ABAIIS/H/EDIT-LEFT TRI STOCK I/H BALSA SHEETPLYDOWELSSH SERVOBLOCKWINO HSLD I/H5/16MAPLESIDE SHEET CROSS DRAINVABALSALOMINUMSOWN BOLT DOUBLERMAIN DEARFUSELESt IS SHEETED WITH S/A BALSA SHEETyR BALSA SHEET FULML SIDE VI 0NOT S/OWN FOR CLARITYCROSS DRAIN 5IOSH5B S I/H SIA MAIN WHEELS______________________________ I/HWIDE-SPRIND STEEL DA PLY SHEET OF 2 AVIATION SWEEP EE ING BY E OUARCO IALL RIONTS RESERVED gradually increasing amount up control Applying slightest amount left rudder causes plane turn yaw about itself vertical axis Gradually correcting turn applying increased throttle lit tle down elevator complete turn head away again Landings can lot fun too can vary little time person ally prefer what Steve calls hover land ings bring plane down about 100 ft altitude cut throttle apply ever-increasing amount up control maintain about 150 nose-up attitude speed drops off plane begins sink quite rapidly about same speed its forward velocity Just before contact ing ground apply little throttle slow descent gain little forward speed light touchdown Left 3AB sheet fuselage sides 1/8-in sheet doublers shown cut out trimmed final shape Right view forward end fuselage sides shows details Slot stabilizer Note Small groove cut rear slot elevator control rod August 1989 29 __________ s / W7 ____-7 4_A-- 7Z31/RI BALSA TFRAME B BIB STRUCTURE TYPICAL HINGE LOC AT ION /HHSPY-HOLLDWEE ALSA BLOCK ALSA -ELEV SUPPORT 3/IA 3/B SPANS TO 3/B 7/8 BALSA LEAfING EDGEBOTTOM SEE RIB VIEWS FOR SHAPE LEFT WING PLAN TOP VIEW ___ _________SW BALSA CENTER SECTION SHEETING 1/4V16 BALSA CAP STRIPS TOP SREET1NG TOP AND BOTTOM ____1/2 BALSA SHEET AILERONS I/IA PLYWOOD I/IA B 3/H 7/B LE TAPEF SAND AS BALSA BLSCR-SHAP TO MATCH PUSELAGE--S/IA 3/B BALSA SPANS TOP AND BOTTOM 3/32BALSA SHEET NIBSIN VERTICAL GRAIN BALSA WEBBING BET NIBS IR-2NTH-AH-SN AH-SH-BH-VH-IS RAI 74__—1/_ 3/B 1/2 BALSA T ENOTE DIHEDRAL IS I/1A PLTWODISAND TO SHAPE UNDER EACH TIP COT REND AT__________________________________________________________ CENTERLINE _____/ RIGHT WING PLAN TOP VIEW TYPICAL HINGE INOTE WING SHEETING B CAP STRIPS OMITTED FOR CLARITY LOCGTION 3-Il/IA AILEHON LINKRIGHT SlOE IS 0123HSA I I truction Though building Swee pee relatively straightforward overall few things must done lit tle differently Some steps stabilizer con struction intertwined construction fuselage vice versa exam ple elevator control must mounted before fuselage fully sheeted Use whatever type glue prefer use Jet brand medium-viscosity cya noacrylate glue CyA nearly building relying epoxy occasionally think necessary Stabilizer Cut two sheets /16 balsa outline stabilizer plans sheets trace positions A-in sheet internal stiffeners Pin marked balsa sheet onto building board build directly upon using 1-in-wide strips A-in sheet Add tips A-in sheet center section Add top sheeting sure glue top sheeting edges stiffeners center section important since canards Sweepees stab accounts greater percentage total weight airplane conven tional designs Cut two elevator halves A-in balsa sheet Sand taper shown typical stab cross section plans Drill /6-dia hole elevator half connecting wire attaches Bend /16 stainless steel wire Ushape shown plans Flatten out Left slotted fuselage doublers installed match side slots Right Fuselage sides formers doubled ready assembly 30 Model Aviation Full-Size Plans AvailableSee Page 170 VIA BALSA LEADING EDGE SHEETING TOP AND BOTTOM I/O BALSA SHEET SEE H-I FOB SHAPE 3/3D MUSIC WIRE AILERON LINK NOTE ALL WING RIBS ARE 3/32 BALSA SHEET I/O BALSA SHEET SHAPE AS SHOWN 3/H V2 BALSA SHAPE AS SHOWN LOB 1/4 BALSA CAP STRIPS TOP B BOTTOM ALSA TE TOP iIZiD SHEET 2 OF 2 MODEL AVIATION SWEEPEE DESIGNED BY SAN JAY DHALL TRACING BY JOE DEMARCO IALL AUNTS RESFAVIB in brass tube cut file shape shown fuselage side view Drill two 1A6-dia holes tube per plans Slide U-shaped control wire through holes control horn making sure horn exact center wire Rest wire flat board holding control horn vertical sol der joint between two Sand wire joint before soldering ensure solid connection Make small notch centerline trailing edge stab brass control horn can move freely assem bled Sand stab edges around nice rounded section shown plan stab cross section Bevel round trail ing edge Fuselage Cut out fuselage sides Y6-in sheet balsa Cut out two side dou blers nose area wing saddle A-in sheet Note /6-sq notch aft end slot seating elevator control wire Add -in triangular strips edges fuselage up trailing edge wing saddle Cut out former Fl -in ply Laminating two A-in ply sheets will work just well Drill three holesone throttle pushrod two fuel hoses Cut slot nose gear pushrod shown plan Cut out former F2 A-in ply Note glued position former doesnt extend way bottom fuselage terminates near trailing edge stab Cut former F3 A-in balsa Cut formers F4 F4A A-in ply Glue together drill 34-in-dia hole wing dowel Cut out F5 F5A A-in sheet ply Glue together bevel side edges angle match fuselage contour assembled Bevel inner sides fuselage extreme rear edge two sides will join sand area down Glue August 1989 31 Partially assembled fuselage shown formers place pushrod tubes installed 1 ne partiaiiy completed front end fuselage showing elevator control rod installed Left The elevator control complete pushrod clevis locked place Right stabilizer being slipped position its Slot Left The underside partially completed fuselage showing plywood main gear mounting base stabilizer nose gear mount place Right first two formers turtledeck Installed planked fuselage fin main gear stab place Left The turtledeck well under way spine place top formers Right Wing ribs cut out arranged ready assembly Left Wings under construction plans webbing lower spar place Right Wing construction showing webbing grain direction two fuselage sides formers F3 F4 Glue formers F2 Fl place Joining two sides tail bent quite sharply will require some patience little time wet rag First chisel out 1A-in wing doubler aft former F5 almost /32 Wet outer surfaces fuselage sides letting sit about minute Begin gradually bending fuse lage sides bringing together little time Press sides together little time gradually release Re peat procedure until two ends fuselage join up nicely Glue joint liber ally wood reasonably dry worst now behind us Add 1A-in triangular balsa stock edges havent yet done joint tween fuselage firewall former Fl Plank top fuselage Y16-in sheet balsa between F2 tail end being sure grain runs length wise Use rough sanding block remove excess balsa top planking Cut out hatch fuel tank chamber 3A6-in balsa Sand shape dont glue Glue Y8-in hardwood servo tray blocks Slide U-shaped elevator control wire through cutout stab place 1/16 groove rear end cutout Insert stabilizer through slot control wire already its groove difficulty encountered pushing stab through slots enlarge slightly Push stab clear through align symmetrically about centerline Glue joints between stab leading edge former Fl trailing edge former F2 slots careful glue control wire stabmove few times make sure its completely free Insert outer tubes flex pushrods Measure distance front servo tray trailing edge stab Cut outer flex tube about inch short Rough sand tubes will attach fuselage formers Cut another tube extend front servo tray 1 /2 past firewall third tube goes servo tray nose gear slot firewall Slide tubes through holes formers glue place Cut pushrod tube elevator con trol few inches longer outer tubes Slide through tube screw 2-56 threaded wire mount clevis front end Attach clevis brass control horn double-checking joint secure Slip piece 14-in sil icone tubing over clevis keep opening use Glue %-in balsa block fuselage sides directly over contact el evator pushrod shown plans prevent flexing undesirable downward position servos may mounted point procedure ing described later Sheet bottom fuselage Start cutting out two pieces -in ply main gear will eventually mounted Position aluminum undercar riage over two sheets drill 32 Model Aviation Left Close-up view leading edge center section reinforcing block Right structurally complete wing halves shown joined together Left The bottom wing center section shown partially planked Note cutout center ribs upper planking aileron servo Right formed aileron links rolled paper tubes Brass tubes can also used must installed before wire bent screw holes Mount 6-32 blind nuts above smaller piece glue place glue second piece shown plans Plank bottom using -in balsa sheet Note grain planking runs across width fuselage Cut piece A-in ply install rearmost tip fuselage will used mount tail skid Sheet rest fuselage between former F5 ply sheet entire bottom fuselage sheeted construction technique diverges somewhat depending whether youre building version tur tledeck youre building basic ver sion square-box fuselage ready addition fin rudder Cut out parts A-in sheet balsa Sand fin cross section similar stab taper rudder Glue fin place add A-in triangular stock sides along entire length joint Glue thoroughly fancier model turtledeck glue fin fuselage above dont add A-in triangular stock Cut out formers FT 1 FT2 FT3 A-in balsa Mount FT3 directly front fin Glue FT1 FT2 place top sheeting fuselage Cut 22Y4-in-long strip A-in sheet balsa tapering 34 /l6 Po sition glue strip over formers FT1 FT2 FT3 sanding blend August 1989 33 structurally complete wings ready final covering aileron installation contour three formers wrap around formers Cut two sheets %2-in balsa A-in strip spine glue place sides turtledeck Dampen outer Add balsa blocks side fin sides two sheets using wet rag match turtledeck Sand blocks Stores Four Aircraft Setups Includes Seven Different Servo Configurations Individual Surface Travel Limits Centering Single Switch Presets Launch Speed Modes Full Trailing Edge Control Enhanced Mixing Functions Crow Landing Capability * User Selectable Cross Trim Capability * Flap Stick Reversing ator Camber VTR * Automatic Selection High Au Rudder Mixing Launch Landing Modes * New Feature Fully installed kit Control Systems Laboratories 238 5 Hillview Dr Milpitas CA 95035 408 946-4142 Aiaronk~ Modute 75P registered trademarks Airtmnim Inc NEW FEATURES ADDED! STMElevator Advanced TeehnoIoy Radio control SystemCamber % Works standard FM/PPM Receivers Airtronics PCM Receivers Converts Module 75P advanced computerized control system IVTRl05/v77 I/72// o 070 100 Elevator Stick Position % %2-in planking cross sections shown plans Carve out balsa block canopyor might want use plastic canopy can find match cross section Glue canopy front turtledeck sanding fitting till its flush Drill four holes firewall attach engine mount Sand round off fuselage corners cross sections shown plans Epoxy fuel tank chamber fuel-proof Epoxy firewall inner sides fuselage front Drill top bottom engine mount serve mounting block nose gear Glue hardwood block receives wing-mounting bolt dont drill bolt point Cut slots install hinges stab elevator halves sert hinges attach elevator stab Wing Cut two sets wing ribs Ri RiO 4 %2-in sheet balsa Pin down /6 x %-in balsa main spar directly over plans right wing Mount lightly glue ribs R2 through RiO bottom main spar leading edge grooves spars trailing edge must bev eled about 200 edges line up correctly leading edge spars trailing edge achieve correct angle forward sweep Cut out balsa webbings -in sheet two webbings size correspond ing positions right left wing webbing goes between spars grain must vertical vertical dimen sion webbing rib can mea sured rib patterns plans slight taper though insignificant critical webs extend toward wing tip webbing between ribs Rl R2 must angled rib Ri may tilted slightly achieve 1 /2in dihedral under wing tip Mount rib Rl appropriate angle Glue top spar push place rests rib slots over web bings Glue spar ribs web bings Cut out leading trailing edges %-in sheet balsa Note both slightly tapered leading edge must tapered 7/ root rib 3/4 tip ribs trailing edge tapers /16 tip ribs Rest leading edge sanded shape yet four five pieces scrap balsa building board align ribs should positioned leading trailing edges same height rib will help ensure warpfree wing Glue leading trailing edges place Reinforce joints dry lift wing off board Glue i-in-wide sheets /16 balsa top bottom trailing edge shown plans Glue 3-in-wide /16 planking between 34 Model Aviation IT-i TRANSMITTER TRAY * Recommended especially handicaps beginners.experienced pilots love also * Pays itself times over airplanes saved With set Gimbal Extenders $350 Postage & Handling Make Flying Breeze BJ ENTERPRISES 1100 Center Street e Montana 59501 TO ORDER CALL 1406 265-4828 Cost ecuna Rngtri pviisn rnsrrea Socket cop screws Inciudec DRILLED AND TAPPED FOR #JT20Os MAX FS 6OO #JT-4DUndrltled 2040 0 UPRIGNTOrIN #JT41lIP VT 211000 ENGINE #J1-42ENVA 35-40401000 jvaoi iq-As1950 #JT-43SAITO FA 40-451000 Jr-001 40-002050 #JT44OS MAX FS 401000 jr 75-132260 #JT45SAITO FA 404510 00 #JT-46ENYA464C1000 #JT-49HPVTA91200 #JT60Undrllled 6090 1100 UPRIGNT/NIDI DNa #JT-61OS MAX FA 611300 #JT62OS MAX PS 60-75-901100 51-9087573 2260 #JT-64ENYA 60-80-90-129 401300 #JT-66SAITO FA 651300 #JT120 Undrilled 1201600 #JT-121ENYAR I2OFC2000 #JT122 OS MAX PS 1202000 INVERTED #JT-123 SAITO PA 1202000 #JT-125 Super Tigre 25-3000 sr-ssais-u2260 available hobby shop ORDER DIRECT far return UPS shipment n tolone Co UNIVERSAL IN-COWL AIRCRAFT MUFFLERS 19-4045-6075-1 3 engines Most versatile mufflers ever offered Designed fit inside cowls limited space can also used HELICOPTERS BOATS UPRIGHT INVERTED SIDE mounted engines Exhaust tubes point almost direction Worm drive clamp universal mounting -an bolted directly engine INCLUDES EsSaust pipe eeteraa alIt darapI warn dine pianO mottle erenent pOle gasket ana reaurteig screws GIANT ENGINE MUFFLERS Molcted engine Toil pipe extensIons ond mountIng baits mckjded Also available tar ATlAS 46 BULLY COBRA KAWASAKI KIORIT SACH-DOMLER SUPER TIGRE 2500-3000 JT-Q3A QUADRA 35 Jr Z34 ZENOASI 0382750 Jr 954 ALmC 190 2760 51-035 QUADRA 3551-030 ZENQAII 038 Jr-zSuZENOASI 0382760 51-MONMA3530 2760 SIC f51060 08JaDRA60/~ lapariSTAN sngC V2750 IU050 urmieerENGINE ...0....J TPEA 51-403 19 451960I 51-60248-602960SIDE MOUNT MUFFLERS 51-90375-IS2260 ~ PITIS CAP 21 CESSNA 150 etc -403 45602198 -60345-002060MARPeaseaddsSSfsruPs 90375-2260hacKMOVISAMcsrcoOtess Add B50 025r8 tpt con FREE CA TALOG ENGINE TESTING STANDS cast Aluminum l rassreena Na Jr 0S2 GOnt Aal 2A te 25 2995 U 295 leading edge main spars top bottom Build other half wing following same general procedure Sand off ex cess planking center section Join two wing halves together rib Ri Cut out slots wing servo joined Rl ribs Sheet center section between ribs Ri R2 both sides wing top bottom 1/16 sheet balsa Cut opening top planking aileron servo di rectly over slots ribs R 1 servo rails consist two l-in-long %-in wide strips A-in ply positioned front back ends opening Keeping ribs centered glue /j x A-in cap strips over remaining ribs top bottom spar trailing edge Cut wing tip blocks -in balsa using outer wing cross section rib RiO pattern Two laminations %-in sheeting will work just well Glue tip blocks wing tips Glue triangular wedge block front leading edge joint center section leading edge center wing flush fuselage former F4 Add another block underside wing front center section shape bottom wing will eventu ally blend bottom fuselage Slick isnt Make up two aileron links %2-in spring steel wire Bend wire di mensions shown plans Note wire bent planes congruent right gles two links should mirror images another wish make aileron link tubes out paper take smooth sheet paper cut out two rectangular pieces 3 wide 1 long Carefully roll sheet pa per around middle section wire wide side parallel length aileron wire Let paper unfurl Roll paper turn apply bead glue along entire width paper Roll turn apply thin layer glue over entire sheet roll up completely Use brass tubes prefer remember slip wire before bending Cut grooves seat aileron links trailing edge wing towards center section shown plans Glue pa per brass tubes place taking care keep glue away moving wire Cut two trailing edge blocks -in sheet balsa 1 Cut grooves trailing edge block will seat well against aileron link tubes Make certain aileron wires move about 300 direction sure cut slots top surface wing wire exits allow free movement Follow same procedure trailing edge blocks glue place Sand leading edge wing match contours rib patterns Al Radio South Batteries 500 ma Pack 48V1300 Futaba conn1550 800 ma Pack 48V2200 Futaba conn2475 1200 ma Pack 48V2400 Futaba conn2700 TX batt Futaba G-SerieB PCM2995 Orders COD e VISA MC American Express subject change notice OPEN 8-5 CST904 478-6745 9003 N Davis Hwy Pensacola FL 32514 J August 1989 35 RADIO SOUTH KiCTh AUTHORIZED SERVICE CENTER Cali Tony Stiliman Ken Dudley custom work competition needs stock complete hobby line specializing competition accessorIesall discounted prices 0 _______ FREQUENCY CONVERSiONS gAgP._ MACommittee Approved ____________fR2&i1 ___________ • 0.1L%6•We stock Futaba JR radios Featuring fast service ngines parts qualified people t ri heBders pipes latest equipmeut including Repair Heli Sets Gyros SPECTRUM ANA YZER experience Great Performance Quartet x DALOTEL 850 SPAN 69 Ins WING AREA 830 sq ins dL SPAN 76 EXTRA 230 WING AREA 900 sq ins ZLIN 526 SPAN 72 ins WING AREA 900 sq ins series Sport Scale Balsa ARF Airplanes 120-4 cycle equivalent motors available direct select hobby shops RO MARKETINO bottom center section must kept flat width fuselage top surface may sanded completely Sand trailing edge blocks match con tour ribs Taper nice edge about %2 thick Sand wing tips pleasing round contour trailing edge must beveled shown rib cross section Cut ailerons length 1 / x -in sheet balsa taper trail ing edge about Y32 Cut out piece shape shown plan wing center section serve protective surface wing bolt tightened down later Drill A-in hole retain ing bolt making sure hole perpen dicular surface Holding fuselage inverted place wing fuselage wing saddle Drill hole hardwood block fuse lage using A-in hole wing guide Remove wing thread block using 4-20 tap Drill Y6-in hole leading edge center section block wing match hole former F4 sert Y6-in hardwood dowel glue Round off edges dowel Cut slots wings ailerons hinges Drill hole ailerons attach aileron control wire Use five-minute ep oxy glue hinges place youll need time properly position hinges Wipe away excess glue around hinges before dries wing now ready covering Covering Any iron-on covering suit able personal favorite Black Baron seems take compound curves better other materials Cover fuse lage stab wings separately Cover elevators rudder ailerons before glu ing hinges sure roughen up bonding surfaces hinges before glu ing Install rudder hinges Drill %2-in hole fiberglass engine mount nose gear wire shown plan Trial fit remove nose gear wire attach mount front former Fl using four 34-in-long 6-32 bolts blind nuts Drill hole bot tom sheeting fuselage nose gear wire must pass install nose gear thread gear wire through hole through steering linkage lower hole en gine mount Insert two %2-in wheel collars retain nose gear engine mount Push nose gear way through upper hole engine mount positioning least 46-in clearance between nose gear spring coil fu selage bottom Slide lower wheel collar sits flush mount tighten place Move second collar up flush mount tighten Position tighten nose gear steering arm angle shown plan Mount aluminum main gear four 6-32 bolts Install two 2A-in Du-Bro wheels main gear 2-in wheel nose gear Install clevis PRECISION MODEL PRODUCTS fl/i ifs Made USA BARSTOCK ALUMINUM SPINNERS Part NoSize 11-1508 . 11/2 11175B 3/4 TI200B TT225B .. 21/4 11-2268 .. 2-114 PAl . 11250-B .. 2-1/2 11251-B 1/2FAI .. TI275-B .. 23/4 TT-276-B . 2314 FAIl 00B 3 11-3018 3 PAl fl325B 3-1/4 11350B 1/2 11375B 4 11-400-B etailApprox PriceWeight $1395058 az 1495095oz 159510002 169516002 1895150oz 1895190oz 2095170oz 2295220oz 2495200oz 2695260oz 289525002 369534002 4995470 02 5995520 oz 6995570 oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $3 00 Per Spinner PROP NUT ADAPTORS V 0 Part NoSize 11-140-A -28 11-147-A1/4-28/7mm 11-610-A6 x 10mm 11-710-A7 x 1 0mm 11-516-A5/16-24 rI-518-A5/16-24/8mm 11-810-A8 x 10mm 11-825-AOx 125mm 11-375-A3/8-24 11-125-AlOx 125mm RetailApprox PriceWeighl $4 95 .061oz 495 061 oz 495063 oz 495 082 02 495 076 02 495.076oz 495 0 7602 49507502 59511702 595ll5oz 3 Pieces Nut Washer Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 36 Model Aviation CHIPMUNK 850 SPAN 70 ins WING AREA 850 sq ins PO BOX 3076 OAK RIDGE TN 37830 PHONE 615-4824188 Learn pros Top Flite Step-by-step MONOKOTKapplication details clear easy-to-follow full-color close up action Wings Fuselage Trims Color-on-color Designs Hinging Basic through advanced heat gun iron usage techniques tape approximately 1 hour MONOKOTI Basics Wings Tail Sections Fuselages Hinging Color Schemes Trimming MONOKOTI Il Advanced Color Schemes Designs Wing Tips Multi-Color Combos MORE MONOKOIK III Airframe Prep Advanced Wing Tips Hinging Color-on-Color Graphics Painting MORE MONOKOTE IV Wing Tips Canopy Covering Advanced Graphics Striping Car Bodies MORE MONOKOTI V Detailing Chrome Scale Tips Concave Surfaces Fragile Wing Tips MOREi COUISI ugA GREAT FOR CLUB MEETINGS RENT OR BUY $3995 $20 Refund per tape Rentals returned undamaged within 30 days Please specify 111111 IV V order SPECIAL PURCHASE ONLY COMBO OFFER Combination 2-hour long tapes Specify & II III & IV Only $65 Save $1490 Sorr no rentals available Combo tapes Send check MO Name Full Address choice VHS BETA format r TOP FLITE MODELS INC Monokote Video Course 2635 S Wabash Ave Chicago IL 60616 nose gear pushrod connect steering arm Any adjustments may made servo end pushrods stall three servos servo tray Drill hole left rear fuselage per plans angle allow rudder pushrod pass through Cut strip thin sheet metal wide bend drill make tail skid Mount /2A control horn side rudder shown plan Connect pushrods servos using standard Futaba servo disks Trim elevator pushrod size before connecting servo Position elevator pushrod bot tom surface elevator flush bottom stab neutral position Set throw elevator about /6 in either direction Mount aileron servo ensure have about % throw direction trailing edge ailerons canard elevator directional response opposite conventional model airplane other words nose plane pitch up elevator must move down nose move down elevator must move up havent already done drill two holes firewall fuel lines Mount Sullivan 8-oz flex tank Install Y6-in sheet hatch over fuel compart ment securing four small wood screws corners Mount engine fiberglass mount using 6-32 bolts Use 10 x 6 prop 40 size engine Follow manufacturers prop size recommenda tion larger engine Use 2 14-in CR spinner Cover receiver battery pack foam store wing saddle area fuselage Appropriately placing battery pack may thats necessary balance model indicated centerof-gravity Mount switch somewhere left side fuselage avoid exhaust spray Mount wing using A-20 plastic bolt Flying have patience wait perfect day set Sweepee sailing youre afire see flies weather isnt terrific let loose anyway Before launch model sure bal ance center-of-gravity indicated plan5 Y4 leading edge wing empty tank built plane according plans adding weight achieve balance point shouldnt neccesary need make adjustment relocating battery pack should sufficient Use center-of-gravity position first few flights Should feel need move center-of-gravity after shift small increments say /8 time respects Sweepee flies just like other model though does have few quirks remind of its maverick origins As youll probably observe no mat ter much up control use model Continued page 131 New Rocket Uses B C andD Engines. Capability No Else Offers MRCs recent introduction 25 Moonblaster inter mediate kit brings yet another technological advance MRCs Computer Aided Designs CAD built carry B4-2 C6-3 engines However Moonbiaster also commercially sold rocket kit includes easy-touse adapter also allows louse powerful Dengines Bulltto take blast Moonbiaster features large die-cut balsa fins blowmolded nose cone superb space capsule detailing Self stick decals 18chute Send free catalog See full line advanced MRC rockets hobby dealer cant help call us directly MRCG Model Rectifier Corporation 2500 woodbridge Ave Edison NJ 08817 1201 985-7800 August 1989 37 Letters Editor Continued page 11 Ni-Cds dont seem affected cold anything like alkaline cells Once problem corrected lit tle Nickle flew flawlessly greatest small three-channel airplanes have ever flown James Harris Marion OH Safety/Preston Continued page 22 fit inside muffler between bolt holes will stop two halves warping have done three G-38s havent problems mufflers coming loose Now respect firewall fire picture column builders Giant aircraft would use engine mounts made engines flat plates come would have air gap behind muffler cool ing gasoline engines run hot dont think put hand hot muffler like did five years ago Thanks have taken time write describe mishaps Without letters would no Safety column wish another safe month Sweepee/DhaII Continued page 37 wont take off until its ready airplanes slow speed flying characteristics indicated also peculiar com ing out near hover increase throttle gradually ease off elevator stick using little down control get some extra speed Try maneuvers safe al titudes beginning youre getting used airplanes foibles might also find need get acquainted its strange appearance air before attempt ing anything too fancy color scheme clearly distinguishes front plane back should come handy low throttle condition flight charac teristics model similar sport airplane until force high angle attack slow speeds gradually increas ing up control seems have little effect airplanes attitudebut does bring model virtual halt point sink rate will high probably will have keep rudder control active keep course However plane shows relatively little tendency stall out condition Im still exploring full range SAFE FLYING IS NO ACCIDENT airplanes flight characteristics Join search Discover Sweepee yourselfand happy backward flying Radio Technique/Myers Continued page 41 must wary transmitters 910 MHz 455 channels away Such transmitters MRS/PRS transmitters find strong signals S SlO5 115 125 135 145 565 575 585 595 605 have consider potential interferences xx5 shorthand code PRS channel 10 kHz above RC channel number given Channel 105 0 MHz Image example strong signal S und 72040 PRS 125 may interfere 5C455 receiver channel 125 RC58 summary find something scan ner note its frequency some mathemat ics see what found might problem Lesson #6 much stuff really inter ference looking signal 72xxx MHz has strength 55 nd can expect signal adjacent channel problem wideband receivers air Expert opinion says 55 al should investigated Try find Out what causing Wet insulators high-tension line might cause condition often clears up after sun burns off morning dew An S ignal should always answered ground range check before flight EVEN Continued page 134 August 1989 131 responding advertisers mention read about ModelAviation I