Ki-61 Hien

The first Japanese fighter aircraft WW II earn reputation tough airplane could withstand real punishment stay air semiscale Control Line model though made cardboard inherits origi nals ruggedness EChuck Felton 70 Model Aviation THE PROTOTYPE AIRCRAFT its possessed substantially heavier lire power name meaning flying swallow Japanese markedly sturdier airframe completed December 1941 traditional Japanese Imperial Army Air Hien dubbed Tony powered Ha-40 liquid-cooled engine Service fighter designs earlier air- Allies went action around New revised lightened version craft lightly armed lightly loaded Guinea April 1943 Despite service German DB6O1 engine Hien highly maneuverable contrast problems including often unreliable reached speed 368 mph performed Hien stressed speed climb-and-dive engine lien forced Allied pilots very well against captured P-40 Bf characteristics marked introduction modify tactics evolved 109 sent Japan submarine pilot armor protection self-sealing combat lighter nimble Japa Hien radical departure fuel tanks Japanese fighter also nese fighters Hien thoroughly fcot gives wingspan 60 length 45 bottom airfoil flat curved upper surface due scoring folding technique Working cardboard Before becompetent design virtually as-employed Engines of30 40 Cu fl can pect other type wasbe used responsible disproving widely held belief Japanese aircraft light weights incapable taking punishment surviving model constructed primarily m corrugated cardboard greatly re duces both cost building time design makes use cardboards unique properties wing built two large pieces cardboard cardboard ribs single spar tail surfaces fuselage primarily cardboard little internal bracing result low cost lightweight fast building model has gcod scalelike appearance can take plenty punishment flying field Cardboard varies weight cardboard will Sources material include box manufacturers local shopping centers anywhere else can find stacks discarded boxes Look cardboard brown paper side white-finished paper other white paper outside model results smcother finish neater appearance method folding cardboard use gummed paper tape seal joints exposed corru gations explained construction hints model built scale 1 inches September1986 71 Top careful finish authoss tips working cardboard wiii find hard tell anything other baisa model Above Shown author can get idea actuai size fine-flying quick-to-build model Full-Size Plans Available. See Page 170 II OREQOHE 1014 BALSACLOTl RINGES EIA PCRCES-I 4 DOWEL 00 ElRU4 READ H B AB ii B PROP 4AR I/NHIROCOOPFOLD NEPLOinHB HR WIRE 3IOORHLSA Jf~HEAR THREAD COLOR SCHEME BASAORHO AND GARB GREEN H/HSNDERSLHFHCCS WIIIK-IIW TB LOOT GOHO 3DM WADEli~4iJ~SHEET OF 1i ABMUERRIA RON NRENEPAED W ULIjIjEIi7 B BHRHKFBTRN OF CAROBOARO TOGETHER CROGOGRAIN IHBPLYUii NI IUlID 2IDI III IIBELTRANKIIIIRA 114II IR OS IlBALSAOPR4E IIU II ROAN ~ZHHHHZUCF41-AT 014W WHEEL 3/IA L4DR DOWEL I~UTLINE gin take look special tips Water-based glue such white glue Titebond recommended Contact ce ment recommended since parts can shifted gluing surfaces scoring fold lines done screening tool available hardware store consists handle 1-inradius wheel end run along straightedge fold line Waterproofing cardboard quite simple can done raw material before cut out parts model Simply mix 25% clear polyurethane 75% paint thinner latter can cheapest hardware store variety thoroughly mixed clear polyure thane Brush mixture liberally onto cardboard sheet allow dry 48 hours adds no appreciable weight material renders cardboard completely waterproof addition start cut treated cardboard will find crisp wood cuts sharply cleanly Cardboard solid surface no open areas cover non-porous easiest finishing method give three coats color dope two coats clear dope However wide variety finishing materials may used cardboard Coverings such Solarfilm MonoKote vinyl paper OK recommended surface doped will result better bond seams joints exposed edges model covered strips gummed paper tape Obtain 1-in-wide roll stationery store Simply cut thin strip length dip water smooth over seam Construction Cut out cardboard wood parts using template outlines sure note direction corruga tions Score fold cardboard parts indicated plans Left leading edges tail surfaces capped balsa Elevator joiner hardwood dowel author used cloth hinges prototype Right Wing has single balsa hardwood spar cardboard ribs leading edge foldsto obtainthe curved uppersurface 72 Model Aviation NRN Full-Size Plans Available. See Page 170 PD VA FSA SPUR JOINER 2 READ CARDBOARD DOUBLER B PLY AILERON OUTLINE C OUP U SIT E WINO OPAR LA WA LINE 0010 F WA W7 READ OD II 04////IlIlll\\\ I//I/IIJII\\\\ - Kim LINE 00102 I/A PLO/II/IIiIl\\\ I//Il 77fl /8 PS UFUR MOUNT 0 REOD K __ jJIB7 Ml WINO RIBA 2 EACA BEAU I11 IIII 01 11111111 EET 0 OF 0 K161 HIEN BeBANBA BREAR ARUAXPEL U04OW Tail surfaces stabilizer Cm rudder elevators made two pieces -in cardboard laminated gether cross-grained give -in surfaces Add n balsa strip Cm leading edge Add n balsa strips stabilizer leading trailing edges Glue elevators -in dowel Add n balsa strips remainder elevator leading edge Round off balsa edges Seal raw edges gummed paper tape Hinge elevators stabilizer cloth hinges four places Wing Make wing spar capping -in balsa spar half n spruce strip top bottom Join spar halves together -in ply joiners front rear ply joiners give correct wing dihedral Glue -in ply gear mount wing panel Glue right side wing spar onto right-hand wing panel Glue cardboard ribs right wing Add cardboard doubler over ply gear mount between Ribs W3 W4 Glue 1-oz weight right wing tip Glue left wing panel left spar right wing along bottom centerline Add ribs gear doubler left wing Apply glue top th spar top ribs trailing edge right wing Fold top wing surface down pin securely place until dry Repeat process left wing Add balsa tips wing Make line guide -in ply Cut slot left wing balsa tip glue line guide place Cover trailing edge seams wing gummed paper tape September 1986 73 C WA PLT JOINERS Left plywood line guide glued slot has cut balsa wingtip Usethe whitesurfaced type cardboard shown possible smoother finish Right plywood firewall uses traditional triangular balsa bracing blind nut installations Left Fuselage sides lined balsa strips double-layer cardboard supports shown mounting beilorank fuel tank supports Right Fuselage sides joined atthe firewall fuel tank can rubberbanded place Epoxyshould used area Lull Belicrank setup uses hardwood pushrod elevator Right Fuseige top uses cardboard formers single balsa stringer Left Formers covered thetop deck piece has scored folded according tothe piansto provide curved shape full-size original Right interior cardboard pieces help give some detail cockpit area providing additional strength Fuselage sides outlined triangular symbol drawing Line upper lower edges fuselage side n balsa strips shown fuselage side view strips recessed fuselage edges Bevel strips aft end fuselage cardboard sides will come together Add cardboard supports fuselage side above fuel tank below bellcrank Make firewall Cl -in ply Locate mounting holes KM-40 engine mount face Cl Drill mounting holes install blind mounting nuts back side Cl Drill hole Cl fuel tubing exit two holes Y16-in dowels Glue dowels Cl Line four back edges Cl -in Continued page 164 tail wheel wire attached 1/s-in plywood platform wrapping both pieces nylon thread applying glue 74 Model Aviation CLEVELANDS GI NTSII MANY NEW FOR R/C BUFFS Denignod Bode Meeter Flying Model Following Beilt-Up Prototype Practice Wood end Pebne II Repliee Reeihiere thee Th,o hi New Historical P eg ted 87 Coct JN4 Jeney537 81 D$4 84 Fokkoe 07 Ftc$39 108 70 Beylec Gee-Bee$32 98 S 60 Hoceed Pete Rece535 99 N 60 Seperreorine 068$24 71 0 89 Scpecroeine 068$35T 95 0 63Cert Heeck P60$42 868 94Cet Beech P-6E$54764 S 74 Deelittlee GB 11$48r72 C 95 Mcnecccpe Sport$36 108 80 Bell Spc Belideg $43 60 Oceglec M-2 Ideri $24 -107 Anecece C-3 Spt 03568 8rceel Beildeg Fee $30 62 Hececed tee Ike $45 59 ficecetece MeLA $54 78 Tocree WW Roe $35- 107 Gre, fleecer PBF $54 63 Cer Geelek Pt tC $42 69 Lndbeegc NO-St 1 $58 94Cc Cockle P1CC $54 91 Lcedkegc NX-21 1 $39 66 Del-Icc Cereet Roe $24 96 WeNWiNce tee $48 62 HoecMMelIgen $35 74 C teIIdc 0B2C-4 855 94 HcecMcMelIigon S45 108 FoiekPT-19 0 $59 63 fleeing P-26A Pt $36 60 Wece Topec-Wieg $36 84 ROein8 P-26A Pee 84890 Weec Tepec-Wieg $48~i O4WeeO C6 CoMe $05 75 Weceld Lyceede $32. 64 Beech C17-8 Stog $30 100 WectIdLyender $49 e 96 Beeeh C17-B Steg $49 57 Feed TeicrI 4-AT $36 * eek 11 Eleetre 830 76 Peed Trierlr 4-AT $48 02 Leek Eleeero $40 114 Pc4 Tejece 4-AT $65 Seiecoe 1/W $87 $18 96 Bellonee Aeee $40 81 Stinsee T/W 087 826 93 teeecg C-2Aeeph $69 122 Selecen 01W 097 $38 50 Gee,- is-P Deck $39 59 Brierel Pt P2-B $20 78 Gre, J2P Deck $56 118 teistol Pt PSOB 54$4 124 Leek Ale Eepeece $48 74 Tecceec Pecce $4$4 62 tech Al Peprece $24 56Cc Weclek P40 $24 83 Leek Ale Eepcetc $26 60 Vegc Ceccoic P40 $35 77 WWcc 121 9edL $48 $0 Vege Coceci P4$ $69 63 C Seekeeck FTC-i 545 78 Lock Lighteg P38 $38 04 C Seekoeck PlC-i epSeoBee Ac $24 108 Sikee 0-08 Acph $49 - 74 RepSec-Bee Ac $39 6$ Beeleeg 10$ Spece $361 70 Flee J-3 Ceb$29 90 Beecc 100 Spere $49 106 Flee i-S Cek53975 Necehcep Geccce $40 98 Leek Hedeec Beck $38 96 Necelccee Geccece $75 63Gecn P6F Helleee$St 90S ece LecS M856 77 Beelee Bt7G Feet 835 405 c Ic S M$45 Bee B-17G Peer 855 150 Se ccA [eec S MOOS eclI Whieleeled $32 78 Ceecel Ce POYSA $42 69 N Acee Neciec 859 104Cc Cc PRYSA $56 68 B8e-ccee V-Tell $29 65 M Ch cc C ppe 060 77 Leceerche Sedee $25 O7MChce C FFe $7 72 NA B-SO Becekee $49 CT Ce Ccc NC 4 $09 65 Motereedee 8-26 $49 94 Ce cc NC 4 $69 tetcceccee-ectcececreeeAcre Ocee 200 OrIeec 6 3 Fe c cc SOc Up Add 10% CecIl edec fee chipp cc & cc etc Co USACoc&Meetlceccheeitc S 25 fleyc Ficteriol eceoleg 0200 liccledec F ce L c P cc cc ceetien dec $100 fleer ole feegee cdd $100 LEVELAND MODEL&SUPPLY Co EeWcetrccectecerctce-c C 18300K 0808010 AVE CLEY LA 44 Phecreeree ceecc cr050 APPLIED DESIGN CORPORATION 738 Penn St El Segundo CA 90245 MINI ER ADJUSTABLE TENSION HAND BELT SANDER FIRMLY HOLDS PAPER FOR EASIER SANDING Padded 11018 COd CUFYSS Handy Ia Hold o Easy lB Use $2f5 MINI-STRIPS PRECISION DIE-CUT Medium Garnel SAVES TIMEREPLACEMENTFine Dorsal AND EFFORT $165SANDING BELTSAssId Waler Preal TEE ALUMINUM EXTRUSION SANDING BLOCK hr use wAll RUFF-STUFF SeA-adhesIve sond paper uirge True Surloce Weal Wear 001 11 Inch $21 Handy Ia Un22 inch $375 RUFF F SELF ADHESIVE SHEET SANDPAPER MAKE YOUR OWN SPECIAL SANDING SHAPES Easy IC Use No meaiy glue drying lime Flea PUS MINL SAW $791 COMPACT 10 inch HACK SAW SAWS ANYTHING ANYWHERE Saw 11a8 rugged di caBI Iranie wIlh camlorlolde chip-pinel plaslic le nefl hoadle Receding ieee ofid ad 1031*10 B blade gIveS Bead wan access Cub weed plolk welal end HARDENED MUSIC WIRE e00r6 hlades-3I5199 change proposal Please send PhOtOSc building tIPSc con test reports items CL Scale Bill Boss 77096 269th Stc New Hyde Park NY 11040 CL Carrier/Perry Continued page 69 hardwood block length dowel fuselage sheeting pivot bearing hook inserted through reinforcement retained wheel collar Although tall hook need retracted high-speed portion flight reduces drag avoids possibility tail hook will catch uneven joint deck takeoff common release uses Down elevator movement pushrod release tail hook latch pin usually As-in music wire often attached pushrod passes through loop attached tail hook Down elevator movement pulls pin retaining loop allows hook fall An alternative favored some use low throttle movement release tall hook Such arrangement requires additional wire tail does allow engine idled before takeoff should desire tail hook release mechanism SH Ringots Wildcat puts no tension pushrod hook retracted adjustable point release also can built force required release tail hook stronger force exerted latch weight elevator way hook less likely released accidentally after engine started Another feature hook released accidentally can latched up again simply raising retracted position also can latch itself up landing under right condi dons two methods holding tail hook down rubberband tension spring Kingfisher photos torsion spring Wildcat tension system can built hooks rubberbands nearly line up pivot point hook retracted reduces force latch mechanism increases springs lever arm tail hook extends method prefer Whatever method used force tail hook should strong enough prevent hook bouncing excessively landing yet strong prevent tail settling deck model placed gently its landing gear hook extended tail hook should extend no 60e horixontal 45c 3O probably better 60e extension can allow tail hook hold tail air unless spring tension reduced point hook will bounce excessively hook portion should shaped tail hook will catch hold arresting line both extended position model resting its landing gear positive down-stop should provided control extended position tail hook screw dowel block wood will serve ade quately Kingfisher uses piece steel cable control line between tail skid small loop end hook limit travel Wildcat relies torsion spring control extended position hook Richard L Perry Model Aviation 1810 Samuel Morse Dr Reston VA 22090 I When responding advertisers mention read about ModelAviation CL Ki-61/Felton Continued page 74 triangular balsa bracing Glue Cl right side fuselage dry glue left side fuselage Cl Attach fuel tank -in ply support fuel tank may attached support rubberbands Make pushrod /$2 wire -in sq spruce attach bellcrank along lead-out wires Install tank bellcrank assemblies gluing ply supports cardboard supports sides fuselage Glue fuselage sides together tail Glue Fl F2 place cover top fuselage sure bring fuel tubing fill overflow lines out during covering operations Cover bottom fuselage F3 through F6 Add Bulkheads through D top fuselage Cover bulkheads Dl has scored folded Add Bulkheads Dl E El F G top fuselage cover D2 Add remaining bulkheads H J top fuselage cover D3 Add three K bulkheads forward bottom fuselage cover D4 cowl made hollowed-out balsa block top half consists hollow block /$6 ply C4 glued front Drill hole C4 install blind nut back side before gluing balsa block glue block firewall removable bottom half cowl consists C2 hollow block C3 holes C2 must align Y32 dowels Firewall Cl aligned glue C2 back face hollow block hole C3 must align hole C4 top block aligned glue C3 front face lower block Sand carve hollow cowl block shape Test-fit engine cowl drill mounting holes KM-40 mount Use shaft extension give adequate spinner clearance Cut holes cowl block cylinder head exhaust needle valve Glue stabilizer fuselage Glue fin fuselage add balsa blocks side fin Sand blocks match fuselage contour Glue rud der fm trailing edge offset outside flying circle Make tail wheel 3/$z-in wire Bend shown place -in ply support wrap nylon thread smear glue dry glue place bottom fuselage cutout Make main gear %2-in wire shown Make gear fairings -in ply attach gear nylon gear clips Attach gear assemblies -in ply supports bottom wing nylon gear clips Make air sccop /$2 balsa glue bottom wing Finishing Paint trim model before final assembly overall model medi 164Model Aviation Add 20% postage Send 25 catalog urn gray dark green camouflage top fin spinner Curtiss blue lettering trim made MonoKote roundels red num bers white Make canopy thin plastic epoxy-glue fuselage Outline canopy thin strips MonoKote aileron flap outlines black MonoKote Final assembly Glue wing fuselage Pass lead-out wires through wingtip line guide tie Attach nylon control horn elevator hookup pushrod Attach 3-in wheels main gear 1-in wheel tail gear Attach 11-6 prop 2-in spinner engine airplane now complete sure balance model point shown plans RC Hi-Tech 2002/Hunt Continued page 97 next flight proceeded uneventfully until dived aircraft maximum speed high-speed flyby camera just about point aircraft pitched downward heard loud buzzing sound above engine/pipe noise After landing inspected aircraft found nothing unusualno nicked blades noth ing obviously loose fan unit itself Since noise started aircraft pitched nose down reasoned fan blades might have stalled theory seemed have merit argument being fan inlet below fuselage being shielded canard wing obstructing airflow fan causing blades stall high rpm Another observation strengthened theory soon noise occurred aircraft slowed like hit brick wall nose well down would expect rapid descent blades stalled thrust forward speed would significantly reduced Returning home expecting cut cheater hole Eee Gads top fuselage found real problem specting MonoKote aileron hinge found either torn completely separated wing both left right aileron tips Assuming severe aileron flutter could cause proceeded stiffen entire aileron con trol system included previously mentioned replacement /32 wire torque rod -in wire replacement Nyrods cable Subsequent flights showed modification alleviated flutter problem Now problems have remedied does fly Fast smooth slow power Takeoffs gorounds rival overpowered sport ships Unfortunately wing loading ap proaching 30 oz/sq ft aircraft must handled gingerly during dead-stick landings will stall wing tip spin like heavy Scale model will notice loss pitch authority have found during few dead-stick landings have perform nose hard keep up already slightly up may seem strange against con ventional flying practices must keep nose level slightly high during approach order perform flared deadstick landing aircraft other condition should aware engine cah overheat left throttle position sitting motionless ground Since cylin der head entirely out wake fan forward motion friend have flown pusher-type aircraft have very likely experienced problem yourself Construction/modifications Construction HT-2002 almost identical HT-200 1 SO will describe changes will also spend some time des cribing construction RK-740 fan unit peculiar engine used OS Max 46 YR DF its installation HT 2002 new forebody constructed -in sheet well solid block balsa Cut out two inboard two out board -in sheet balsa fuselage sides laminate gap-filling cyanoacrylate CyA inboard sheet full length F5 outboard sheet foreshortened September1986 165

The first Japanese fighter aircraft WW II earn reputation tough airplane could withstand real punishment stay air semiscale Control Line model though made cardboard inherits origi nals ruggedness EChuck Felton 70 Model Aviation THE PROTOTYPE AIRCRAFT its possessed substantially heavier lire power name meaning flying swallow Japanese markedly sturdier airframe completed December 1941 traditional Japanese Imperial Army Air Hien dubbed Tony powered Ha-40 liquid-cooled engine Service fighter designs earlier air- Allies went action around New revised lightened version craft lightly armed lightly loaded Guinea April 1943 Despite service German DB6O1 engine Hien highly maneuverable contrast problems including often unreliable reached speed 368 mph performed Hien stressed speed climb-and-dive engine lien forced Allied pilots very well against captured P-40 Bf characteristics marked introduction modify tactics evolved 109 sent Japan submarine pilot armor protection self-sealing combat lighter nimble Japa Hien radical departure fuel tanks Japanese fighter also nese fighters Hien thoroughly fcot gives wingspan 60 length 45 bottom airfoil flat curved upper surface due scoring folding technique Working cardboard Before becompetent design virtually as-employed Engines of30 40 Cu fl can pect other type wasbe used responsible disproving widely held belief Japanese aircraft light weights incapable taking punishment surviving model constructed primarily m corrugated cardboard greatly re duces both cost building time design makes use cardboards unique properties wing built two large pieces cardboard cardboard ribs single spar tail surfaces fuselage primarily cardboard little internal bracing result low cost lightweight fast building model has gcod scalelike appearance can take plenty punishment flying field Cardboard varies weight cardboard will Sources material include box manufacturers local shopping centers anywhere else can find stacks discarded boxes Look cardboard brown paper side white-finished paper other white paper outside model results smcother finish neater appearance method folding cardboard use gummed paper tape seal joints exposed corru gations explained construction hints model built scale 1 inches September1986 71 Top careful finish authoss tips working cardboard wiii find hard tell anything other baisa model Above Shown author can get idea actuai size fine-flying quick-to-build model Full-Size Plans Available. See Page 170 II OREQOHE 1014 BALSACLOTl RINGES EIA PCRCES-I 4 DOWEL 00 ElRU4 READ H B AB ii B PROP 4AR I/NHIROCOOPFOLD NEPLOinHB HR WIRE 3IOORHLSA Jf~HEAR THREAD COLOR SCHEME BASAORHO AND GARB GREEN H/HSNDERSLHFHCCS WIIIK-IIW TB LOOT GOHO 3DM WADEli~4iJ~SHEET OF 1i ABMUERRIA RON NRENEPAED W ULIjIjEIi7 B BHRHKFBTRN OF CAROBOARO TOGETHER CROGOGRAIN IHBPLYUii NI IUlID 2IDI III IIBELTRANKIIIIRA 114II IR OS IlBALSAOPR4E IIU II ROAN ~ZHHHHZUCF41-AT 014W WHEEL 3/IA L4DR DOWEL I~UTLINE gin take look special tips Water-based glue such white glue Titebond recommended Contact ce ment recommended since parts can shifted gluing surfaces scoring fold lines done screening tool available hardware store consists handle 1-inradius wheel end run along straightedge fold line Waterproofing cardboard quite simple can done raw material before cut out parts model Simply mix 25% clear polyurethane 75% paint thinner latter can cheapest hardware store variety thoroughly mixed clear polyure thane Brush mixture liberally onto cardboard sheet allow dry 48 hours adds no appreciable weight material renders cardboard completely waterproof addition start cut treated cardboard will find crisp wood cuts sharply cleanly Cardboard solid surface no open areas cover non-porous easiest finishing method give three coats color dope two coats clear dope However wide variety finishing materials may used cardboard Coverings such Solarfilm MonoKote vinyl paper OK recommended surface doped will result better bond seams joints exposed edges model covered strips gummed paper tape Obtain 1-in-wide roll stationery store Simply cut thin strip length dip water smooth over seam Construction Cut out cardboard wood parts using template outlines sure note direction corruga tions Score fold cardboard parts indicated plans Left leading edges tail surfaces capped balsa Elevator joiner hardwood dowel author used cloth hinges prototype Right Wing has single balsa hardwood spar cardboard ribs leading edge foldsto obtainthe curved uppersurface 72 Model Aviation NRN Full-Size Plans Available. See Page 170 PD VA FSA SPUR JOINER 2 READ CARDBOARD DOUBLER B PLY AILERON OUTLINE C OUP U SIT E WINO OPAR LA WA LINE 0010 F WA W7 READ OD II 04////IlIlll\\\ I//I/IIJII\\\\ - Kim LINE 00102 I/A PLO/II/IIiIl\\\ I//Il 77fl /8 PS UFUR MOUNT 0 REOD K __ jJIB7 Ml WINO RIBA 2 EACA BEAU I11 IIII 01 11111111 EET 0 OF 0 K161 HIEN BeBANBA BREAR ARUAXPEL U04OW Tail surfaces stabilizer Cm rudder elevators made two pieces -in cardboard laminated gether cross-grained give -in surfaces Add n balsa strip Cm leading edge Add n balsa strips stabilizer leading trailing edges Glue elevators -in dowel Add n balsa strips remainder elevator leading edge Round off balsa edges Seal raw edges gummed paper tape Hinge elevators stabilizer cloth hinges four places Wing Make wing spar capping -in balsa spar half n spruce strip top bottom Join spar halves together -in ply joiners front rear ply joiners give correct wing dihedral Glue -in ply gear mount wing panel Glue right side wing spar onto right-hand wing panel Glue cardboard ribs right wing Add cardboard doubler over ply gear mount between Ribs W3 W4 Glue 1-oz weight right wing tip Glue left wing panel left spar right wing along bottom centerline Add ribs gear doubler left wing Apply glue top th spar top ribs trailing edge right wing Fold top wing surface down pin securely place until dry Repeat process left wing Add balsa tips wing Make line guide -in ply Cut slot left wing balsa tip glue line guide place Cover trailing edge seams wing gummed paper tape September 1986 73 C WA PLT JOINERS Left plywood line guide glued slot has cut balsa wingtip Usethe whitesurfaced type cardboard shown possible smoother finish Right plywood firewall uses traditional triangular balsa bracing blind nut installations Left Fuselage sides lined balsa strips double-layer cardboard supports shown mounting beilorank fuel tank supports Right Fuselage sides joined atthe firewall fuel tank can rubberbanded place Epoxyshould used area Lull Belicrank setup uses hardwood pushrod elevator Right Fuseige top uses cardboard formers single balsa stringer Left Formers covered thetop deck piece has scored folded according tothe piansto provide curved shape full-size original Right interior cardboard pieces help give some detail cockpit area providing additional strength Fuselage sides outlined triangular symbol drawing Line upper lower edges fuselage side n balsa strips shown fuselage side view strips recessed fuselage edges Bevel strips aft end fuselage cardboard sides will come together Add cardboard supports fuselage side above fuel tank below bellcrank Make firewall Cl -in ply Locate mounting holes KM-40 engine mount face Cl Drill mounting holes install blind mounting nuts back side Cl Drill hole Cl fuel tubing exit two holes Y16-in dowels Glue dowels Cl Line four back edges Cl -in Continued page 164 tail wheel wire attached 1/s-in plywood platform wrapping both pieces nylon thread applying glue 74 Model Aviation CLEVELANDS GI NTSII MANY NEW FOR R/C BUFFS Denignod Bode Meeter Flying Model Following Beilt-Up Prototype Practice Wood end Pebne II Repliee Reeihiere thee Th,o hi New Historical P eg ted 87 Coct JN4 Jeney537 81 D$4 84 Fokkoe 07 Ftc$39 108 70 Beylec Gee-Bee$32 98 S 60 Hoceed Pete Rece535 99 N 60 Seperreorine 068$24 71 0 89 Scpecroeine 068$35T 95 0 63Cert Heeck P60$42 868 94Cet Beech P-6E$54764 S 74 Deelittlee GB 11$48r72 C 95 Mcnecccpe Sport$36 108 80 Bell Spc Belideg $43 60 Oceglec M-2 Ideri $24 -107 Anecece C-3 Spt 03568 8rceel Beildeg Fee $30 62 Hececed tee Ike $45 59 ficecetece MeLA $54 78 Tocree WW Roe $35- 107 Gre, fleecer PBF $54 63 Cer Geelek Pt tC $42 69 Lndbeegc NO-St 1 $58 94Cc Cockle P1CC $54 91 Lcedkegc NX-21 1 $39 66 Del-Icc Cereet Roe $24 96 WeNWiNce tee $48 62 HoecMMelIgen $35 74 C teIIdc 0B2C-4 855 94 HcecMcMelIigon S45 108 FoiekPT-19 0 $59 63 fleeing P-26A Pt $36 60 Wece Topec-Wieg $36 84 ROein8 P-26A Pee 84890 Weec Tepec-Wieg $48~i O4WeeO C6 CoMe $05 75 Weceld Lyceede $32. 64 Beech C17-8 Stog $30 100 WectIdLyender $49 e 96 Beeeh C17-B Steg $49 57 Feed TeicrI 4-AT $36 * eek 11 Eleetre 830 76 Peed Trierlr 4-AT $48 02 Leek Eleeero $40 114 Pc4 Tejece 4-AT $65 Seiecoe 1/W $87 $18 96 Bellonee Aeee $40 81 Stinsee T/W 087 826 93 teeecg C-2Aeeph $69 122 Selecen 01W 097 $38 50 Gee,- is-P Deck $39 59 Brierel Pt P2-B $20 78 Gre, J2P Deck $56 118 teistol Pt PSOB 54$4 124 Leek Ale Eepeece $48 74 Tecceec Pecce $4$4 62 tech Al Peprece $24 56Cc Weclek P40 $24 83 Leek Ale Eepcetc $26 60 Vegc Ceccoic P40 $35 77 WWcc 121 9edL $48 $0 Vege Coceci P4$ $69 63 C Seekeeck FTC-i 545 78 Lock Lighteg P38 $38 04 C Seekoeck PlC-i epSeoBee Ac $24 108 Sikee 0-08 Acph $49 - 74 RepSec-Bee Ac $39 6$ Beeleeg 10$ Spece $361 70 Flee J-3 Ceb$29 90 Beecc 100 Spere $49 106 Flee i-S Cek53975 Necehcep Geccce $40 98 Leek Hedeec Beck $38 96 Necelccee Geccece $75 63Gecn P6F Helleee$St 90S ece LecS M856 77 Beelee Bt7G Feet 835 405 c Ic S M$45 Bee B-17G Peer 855 150 Se ccA [eec S MOOS eclI Whieleeled $32 78 Ceecel Ce POYSA $42 69 N Acee Neciec 859 104Cc Cc PRYSA $56 68 B8e-ccee V-Tell $29 65 M Ch cc C ppe 060 77 Leceerche Sedee $25 O7MChce C FFe $7 72 NA B-SO Becekee $49 CT Ce Ccc NC 4 $09 65 Motereedee 8-26 $49 94 Ce cc NC 4 $69 tetcceccee-ectcececreeeAcre Ocee 200 OrIeec 6 3 Fe c cc SOc Up Add 10% CecIl edec fee chipp cc & cc etc Co USACoc&Meetlceccheeitc S 25 fleyc Ficteriol eceoleg 0200 liccledec F ce L c P cc cc ceetien dec $100 fleer ole feegee cdd $100 LEVELAND MODEL&SUPPLY Co EeWcetrccectecerctce-c C 18300K 0808010 AVE CLEY LA 44 Phecreeree ceecc cr050 APPLIED DESIGN CORPORATION 738 Penn St El Segundo CA 90245 MINI ER ADJUSTABLE TENSION HAND BELT SANDER FIRMLY HOLDS PAPER FOR EASIER SANDING Padded 11018 COd CUFYSS Handy Ia Hold o Easy lB Use $2f5 MINI-STRIPS PRECISION DIE-CUT Medium Garnel SAVES TIMEREPLACEMENTFine Dorsal AND EFFORT $165SANDING BELTSAssId Waler Preal TEE ALUMINUM EXTRUSION SANDING BLOCK hr use wAll RUFF-STUFF SeA-adhesIve sond paper uirge True Surloce Weal Wear 001 11 Inch $21 Handy Ia Un22 inch $375 RUFF F SELF ADHESIVE SHEET SANDPAPER MAKE YOUR OWN SPECIAL SANDING SHAPES Easy IC Use No meaiy glue drying lime Flea PUS MINL SAW $791 COMPACT 10 inch HACK SAW SAWS ANYTHING ANYWHERE Saw 11a8 rugged di caBI Iranie wIlh camlorlolde chip-pinel plaslic le nefl hoadle Receding ieee ofid ad 1031*10 B blade gIveS Bead wan access Cub weed plolk welal end HARDENED MUSIC WIRE e00r6 hlades-3I5199 change proposal Please send PhOtOSc building tIPSc con test reports items CL Scale Bill Boss 77096 269th Stc New Hyde Park NY 11040 CL Carrier/Perry Continued page 69 hardwood block length dowel fuselage sheeting pivot bearing hook inserted through reinforcement retained wheel collar Although tall hook need retracted high-speed portion flight reduces drag avoids possibility tail hook will catch uneven joint deck takeoff common release uses Down elevator movement pushrod release tail hook latch pin usually As-in music wire often attached pushrod passes through loop attached tail hook Down elevator movement pulls pin retaining loop allows hook fall An alternative favored some use low throttle movement release tall hook Such arrangement requires additional wire tail does allow engine idled before takeoff should desire tail hook release mechanism SH Ringots Wildcat puts no tension pushrod hook retracted adjustable point release also can built force required release tail hook stronger force exerted latch weight elevator way hook less likely released accidentally after engine started Another feature hook released accidentally can latched up again simply raising retracted position also can latch itself up landing under right condi dons two methods holding tail hook down rubberband tension spring Kingfisher photos torsion spring Wildcat tension system can built hooks rubberbands nearly line up pivot point hook retracted reduces force latch mechanism increases springs lever arm tail hook extends method prefer Whatever method used force tail hook should strong enough prevent hook bouncing excessively landing yet strong prevent tail settling deck model placed gently its landing gear hook extended tail hook should extend no 60e horixontal 45c 3O probably better 60e extension can allow tail hook hold tail air unless spring tension reduced point hook will bounce excessively hook portion should shaped tail hook will catch hold arresting line both extended position model resting its landing gear positive down-stop should provided control extended position tail hook screw dowel block wood will serve ade quately Kingfisher uses piece steel cable control line between tail skid small loop end hook limit travel Wildcat relies torsion spring control extended position hook Richard L Perry Model Aviation 1810 Samuel Morse Dr Reston VA 22090 I When responding advertisers mention read about ModelAviation CL Ki-61/Felton Continued page 74 triangular balsa bracing Glue Cl right side fuselage dry glue left side fuselage Cl Attach fuel tank -in ply support fuel tank may attached support rubberbands Make pushrod /$2 wire -in sq spruce attach bellcrank along lead-out wires Install tank bellcrank assemblies gluing ply supports cardboard supports sides fuselage Glue fuselage sides together tail Glue Fl F2 place cover top fuselage sure bring fuel tubing fill overflow lines out during covering operations Cover bottom fuselage F3 through F6 Add Bulkheads through D top fuselage Cover bulkheads Dl has scored folded Add Bulkheads Dl E El F G top fuselage cover D2 Add remaining bulkheads H J top fuselage cover D3 Add three K bulkheads forward bottom fuselage cover D4 cowl made hollowed-out balsa block top half consists hollow block /$6 ply C4 glued front Drill hole C4 install blind nut back side before gluing balsa block glue block firewall removable bottom half cowl consists C2 hollow block C3 holes C2 must align Y32 dowels Firewall Cl aligned glue C2 back face hollow block hole C3 must align hole C4 top block aligned glue C3 front face lower block Sand carve hollow cowl block shape Test-fit engine cowl drill mounting holes KM-40 mount Use shaft extension give adequate spinner clearance Cut holes cowl block cylinder head exhaust needle valve Glue stabilizer fuselage Glue fin fuselage add balsa blocks side fin Sand blocks match fuselage contour Glue rud der fm trailing edge offset outside flying circle Make tail wheel 3/$z-in wire Bend shown place -in ply support wrap nylon thread smear glue dry glue place bottom fuselage cutout Make main gear %2-in wire shown Make gear fairings -in ply attach gear nylon gear clips Attach gear assemblies -in ply supports bottom wing nylon gear clips Make air sccop /$2 balsa glue bottom wing Finishing Paint trim model before final assembly overall model medi 164Model Aviation Add 20% postage Send 25 catalog urn gray dark green camouflage top fin spinner Curtiss blue lettering trim made MonoKote roundels red num bers white Make canopy thin plastic epoxy-glue fuselage Outline canopy thin strips MonoKote aileron flap outlines black MonoKote Final assembly Glue wing fuselage Pass lead-out wires through wingtip line guide tie Attach nylon control horn elevator hookup pushrod Attach 3-in wheels main gear 1-in wheel tail gear Attach 11-6 prop 2-in spinner engine airplane now complete sure balance model point shown plans RC Hi-Tech 2002/Hunt Continued page 97 next flight proceeded uneventfully until dived aircraft maximum speed high-speed flyby camera just about point aircraft pitched downward heard loud buzzing sound above engine/pipe noise After landing inspected aircraft found nothing unusualno nicked blades noth ing obviously loose fan unit itself Since noise started aircraft pitched nose down reasoned fan blades might have stalled theory seemed have merit argument being fan inlet below fuselage being shielded canard wing obstructing airflow fan causing blades stall high rpm Another observation strengthened theory soon noise occurred aircraft slowed like hit brick wall nose well down would expect rapid descent blades stalled thrust forward speed would significantly reduced Returning home expecting cut cheater hole Eee Gads top fuselage found real problem specting MonoKote aileron hinge found either torn completely separated wing both left right aileron tips Assuming severe aileron flutter could cause proceeded stiffen entire aileron con trol system included previously mentioned replacement /32 wire torque rod -in wire replacement Nyrods cable Subsequent flights showed modification alleviated flutter problem Now problems have remedied does fly Fast smooth slow power Takeoffs gorounds rival overpowered sport ships Unfortunately wing loading ap proaching 30 oz/sq ft aircraft must handled gingerly during dead-stick landings will stall wing tip spin like heavy Scale model will notice loss pitch authority have found during few dead-stick landings have perform nose hard keep up already slightly up may seem strange against con ventional flying practices must keep nose level slightly high during approach order perform flared deadstick landing aircraft other condition should aware engine cah overheat left throttle position sitting motionless ground Since cylin der head entirely out wake fan forward motion friend have flown pusher-type aircraft have very likely experienced problem yourself Construction/modifications Construction HT-2002 almost identical HT-200 1 SO will describe changes will also spend some time des cribing construction RK-740 fan unit peculiar engine used OS Max 46 YR DF its installation HT 2002 new forebody constructed -in sheet well solid block balsa Cut out two inboard two out board -in sheet balsa fuselage sides laminate gap-filling cyanoacrylate CyA inboard sheet full length F5 outboard sheet foreshortened September1986 165

The first Japanese fighter aircraft WW II earn reputation tough airplane could withstand real punishment stay air semiscale Control Line model though made cardboard inherits origi nals ruggedness EChuck Felton 70 Model Aviation THE PROTOTYPE AIRCRAFT its possessed substantially heavier lire power name meaning flying swallow Japanese markedly sturdier airframe completed December 1941 traditional Japanese Imperial Army Air Hien dubbed Tony powered Ha-40 liquid-cooled engine Service fighter designs earlier air- Allies went action around New revised lightened version craft lightly armed lightly loaded Guinea April 1943 Despite service German DB6O1 engine Hien highly maneuverable contrast problems including often unreliable reached speed 368 mph performed Hien stressed speed climb-and-dive engine lien forced Allied pilots very well against captured P-40 Bf characteristics marked introduction modify tactics evolved 109 sent Japan submarine pilot armor protection self-sealing combat lighter nimble Japa Hien radical departure fuel tanks Japanese fighter also nese fighters Hien thoroughly fcot gives wingspan 60 length 45 bottom airfoil flat curved upper surface due scoring folding technique Working cardboard Before becompetent design virtually as-employed Engines of30 40 Cu fl can pect other type wasbe used responsible disproving widely held belief Japanese aircraft light weights incapable taking punishment surviving model constructed primarily m corrugated cardboard greatly re duces both cost building time design makes use cardboards unique properties wing built two large pieces cardboard cardboard ribs single spar tail surfaces fuselage primarily cardboard little internal bracing result low cost lightweight fast building model has gcod scalelike appearance can take plenty punishment flying field Cardboard varies weight cardboard will Sources material include box manufacturers local shopping centers anywhere else can find stacks discarded boxes Look cardboard brown paper side white-finished paper other white paper outside model results smcother finish neater appearance method folding cardboard use gummed paper tape seal joints exposed corru gations explained construction hints model built scale 1 inches September1986 71 Top careful finish authoss tips working cardboard wiii find hard tell anything other baisa model Above Shown author can get idea actuai size fine-flying quick-to-build model Full-Size Plans Available. See Page 170 II OREQOHE 1014 BALSACLOTl RINGES EIA PCRCES-I 4 DOWEL 00 ElRU4 READ H B AB ii B PROP 4AR I/NHIROCOOPFOLD NEPLOinHB HR WIRE 3IOORHLSA Jf~HEAR THREAD COLOR SCHEME BASAORHO AND GARB GREEN H/HSNDERSLHFHCCS WIIIK-IIW TB LOOT GOHO 3DM WADEli~4iJ~SHEET OF 1i ABMUERRIA RON NRENEPAED W ULIjIjEIi7 B BHRHKFBTRN OF CAROBOARO TOGETHER CROGOGRAIN IHBPLYUii NI IUlID 2IDI III IIBELTRANKIIIIRA 114II IR OS IlBALSAOPR4E IIU II ROAN ~ZHHHHZUCF41-AT 014W WHEEL 3/IA L4DR DOWEL I~UTLINE gin take look special tips Water-based glue such white glue Titebond recommended Contact ce ment recommended since parts can shifted gluing surfaces scoring fold lines done screening tool available hardware store consists handle 1-inradius wheel end run along straightedge fold line Waterproofing cardboard quite simple can done raw material before cut out parts model Simply mix 25% clear polyurethane 75% paint thinner latter can cheapest hardware store variety thoroughly mixed clear polyure thane Brush mixture liberally onto cardboard sheet allow dry 48 hours adds no appreciable weight material renders cardboard completely waterproof addition start cut treated cardboard will find crisp wood cuts sharply cleanly Cardboard solid surface no open areas cover non-porous easiest finishing method give three coats color dope two coats clear dope However wide variety finishing materials may used cardboard Coverings such Solarfilm MonoKote vinyl paper OK recommended surface doped will result better bond seams joints exposed edges model covered strips gummed paper tape Obtain 1-in-wide roll stationery store Simply cut thin strip length dip water smooth over seam Construction Cut out cardboard wood parts using template outlines sure note direction corruga tions Score fold cardboard parts indicated plans Left leading edges tail surfaces capped balsa Elevator joiner hardwood dowel author used cloth hinges prototype Right Wing has single balsa hardwood spar cardboard ribs leading edge foldsto obtainthe curved uppersurface 72 Model Aviation NRN Full-Size Plans Available. See Page 170 PD VA FSA SPUR JOINER 2 READ CARDBOARD DOUBLER B PLY AILERON OUTLINE C OUP U SIT E WINO OPAR LA WA LINE 0010 F WA W7 READ OD II 04////IlIlll\\\ I//I/IIJII\\\\ - Kim LINE 00102 I/A PLO/II/IIiIl\\\ I//Il 77fl /8 PS UFUR MOUNT 0 REOD K __ jJIB7 Ml WINO RIBA 2 EACA BEAU I11 IIII 01 11111111 EET 0 OF 0 K161 HIEN BeBANBA BREAR ARUAXPEL U04OW Tail surfaces stabilizer Cm rudder elevators made two pieces -in cardboard laminated gether cross-grained give -in surfaces Add n balsa strip Cm leading edge Add n balsa strips stabilizer leading trailing edges Glue elevators -in dowel Add n balsa strips remainder elevator leading edge Round off balsa edges Seal raw edges gummed paper tape Hinge elevators stabilizer cloth hinges four places Wing Make wing spar capping -in balsa spar half n spruce strip top bottom Join spar halves together -in ply joiners front rear ply joiners give correct wing dihedral Glue -in ply gear mount wing panel Glue right side wing spar onto right-hand wing panel Glue cardboard ribs right wing Add cardboard doubler over ply gear mount between Ribs W3 W4 Glue 1-oz weight right wing tip Glue left wing panel left spar right wing along bottom centerline Add ribs gear doubler left wing Apply glue top th spar top ribs trailing edge right wing Fold top wing surface down pin securely place until dry Repeat process left wing Add balsa tips wing Make line guide -in ply Cut slot left wing balsa tip glue line guide place Cover trailing edge seams wing gummed paper tape September 1986 73 C WA PLT JOINERS Left plywood line guide glued slot has cut balsa wingtip Usethe whitesurfaced type cardboard shown possible smoother finish Right plywood firewall uses traditional triangular balsa bracing blind nut installations Left Fuselage sides lined balsa strips double-layer cardboard supports shown mounting beilorank fuel tank supports Right Fuselage sides joined atthe firewall fuel tank can rubberbanded place Epoxyshould used area Lull Belicrank setup uses hardwood pushrod elevator Right Fuseige top uses cardboard formers single balsa stringer Left Formers covered thetop deck piece has scored folded according tothe piansto provide curved shape full-size original Right interior cardboard pieces help give some detail cockpit area providing additional strength Fuselage sides outlined triangular symbol drawing Line upper lower edges fuselage side n balsa strips shown fuselage side view strips recessed fuselage edges Bevel strips aft end fuselage cardboard sides will come together Add cardboard supports fuselage side above fuel tank below bellcrank Make firewall Cl -in ply Locate mounting holes KM-40 engine mount face Cl Drill mounting holes install blind mounting nuts back side Cl Drill hole Cl fuel tubing exit two holes Y16-in dowels Glue dowels Cl Line four back edges Cl -in Continued page 164 tail wheel wire attached 1/s-in plywood platform wrapping both pieces nylon thread applying glue 74 Model Aviation CLEVELANDS GI NTSII MANY NEW FOR R/C BUFFS Denignod Bode Meeter Flying Model Following Beilt-Up Prototype Practice Wood end Pebne II Repliee Reeihiere thee Th,o hi New Historical P eg ted 87 Coct JN4 Jeney537 81 D$4 84 Fokkoe 07 Ftc$39 108 70 Beylec Gee-Bee$32 98 S 60 Hoceed Pete Rece535 99 N 60 Seperreorine 068$24 71 0 89 Scpecroeine 068$35T 95 0 63Cert Heeck P60$42 868 94Cet Beech P-6E$54764 S 74 Deelittlee GB 11$48r72 C 95 Mcnecccpe Sport$36 108 80 Bell Spc Belideg $43 60 Oceglec M-2 Ideri $24 -107 Anecece C-3 Spt 03568 8rceel Beildeg Fee $30 62 Hececed tee Ike $45 59 ficecetece MeLA $54 78 Tocree WW Roe $35- 107 Gre, fleecer PBF $54 63 Cer Geelek Pt tC $42 69 Lndbeegc NO-St 1 $58 94Cc Cockle P1CC $54 91 Lcedkegc NX-21 1 $39 66 Del-Icc Cereet Roe $24 96 WeNWiNce tee $48 62 HoecMMelIgen $35 74 C teIIdc 0B2C-4 855 94 HcecMcMelIigon S45 108 FoiekPT-19 0 $59 63 fleeing P-26A Pt $36 60 Wece Topec-Wieg $36 84 ROein8 P-26A Pee 84890 Weec Tepec-Wieg $48~i O4WeeO C6 CoMe $05 75 Weceld Lyceede $32. 64 Beech C17-8 Stog $30 100 WectIdLyender $49 e 96 Beeeh C17-B Steg $49 57 Feed TeicrI 4-AT $36 * eek 11 Eleetre 830 76 Peed Trierlr 4-AT $48 02 Leek Eleeero $40 114 Pc4 Tejece 4-AT $65 Seiecoe 1/W $87 $18 96 Bellonee Aeee $40 81 Stinsee T/W 087 826 93 teeecg C-2Aeeph $69 122 Selecen 01W 097 $38 50 Gee,- is-P Deck $39 59 Brierel Pt P2-B $20 78 Gre, J2P Deck $56 118 teistol Pt PSOB 54$4 124 Leek Ale Eepeece $48 74 Tecceec Pecce $4$4 62 tech Al Peprece $24 56Cc Weclek P40 $24 83 Leek Ale Eepcetc $26 60 Vegc Ceccoic P40 $35 77 WWcc 121 9edL $48 $0 Vege Coceci P4$ $69 63 C Seekeeck FTC-i 545 78 Lock Lighteg P38 $38 04 C Seekoeck PlC-i epSeoBee Ac $24 108 Sikee 0-08 Acph $49 - 74 RepSec-Bee Ac $39 6$ Beeleeg 10$ Spece $361 70 Flee J-3 Ceb$29 90 Beecc 100 Spere $49 106 Flee i-S Cek53975 Necehcep Geccce $40 98 Leek Hedeec Beck $38 96 Necelccee Geccece $75 63Gecn P6F Helleee$St 90S ece LecS M856 77 Beelee Bt7G Feet 835 405 c Ic S M$45 Bee B-17G Peer 855 150 Se ccA [eec S MOOS eclI Whieleeled $32 78 Ceecel Ce POYSA $42 69 N Acee Neciec 859 104Cc Cc PRYSA $56 68 B8e-ccee V-Tell $29 65 M Ch cc C ppe 060 77 Leceerche Sedee $25 O7MChce C FFe $7 72 NA B-SO Becekee $49 CT Ce Ccc NC 4 $09 65 Motereedee 8-26 $49 94 Ce cc NC 4 $69 tetcceccee-ectcececreeeAcre Ocee 200 OrIeec 6 3 Fe c cc SOc Up Add 10% CecIl edec fee chipp cc & cc etc Co USACoc&Meetlceccheeitc S 25 fleyc Ficteriol eceoleg 0200 liccledec F ce L c P cc cc ceetien dec $100 fleer ole feegee cdd $100 LEVELAND MODEL&SUPPLY Co EeWcetrccectecerctce-c C 18300K 0808010 AVE CLEY LA 44 Phecreeree ceecc cr050 APPLIED DESIGN CORPORATION 738 Penn St El Segundo CA 90245 MINI ER ADJUSTABLE TENSION HAND BELT SANDER FIRMLY HOLDS PAPER FOR EASIER SANDING Padded 11018 COd CUFYSS Handy Ia Hold o Easy lB Use $2f5 MINI-STRIPS PRECISION DIE-CUT Medium Garnel SAVES TIMEREPLACEMENTFine Dorsal AND EFFORT $165SANDING BELTSAssId Waler Preal TEE ALUMINUM EXTRUSION SANDING BLOCK hr use wAll RUFF-STUFF SeA-adhesIve sond paper uirge True Surloce Weal Wear 001 11 Inch $21 Handy Ia Un22 inch $375 RUFF F SELF ADHESIVE SHEET SANDPAPER MAKE YOUR OWN SPECIAL SANDING SHAPES Easy IC Use No meaiy glue drying lime Flea PUS MINL SAW $791 COMPACT 10 inch HACK SAW SAWS ANYTHING ANYWHERE Saw 11a8 rugged di caBI Iranie wIlh camlorlolde chip-pinel plaslic le nefl hoadle Receding ieee ofid ad 1031*10 B blade gIveS Bead wan access Cub weed plolk welal end HARDENED MUSIC WIRE e00r6 hlades-3I5199 change proposal Please send PhOtOSc building tIPSc con test reports items CL Scale Bill Boss 77096 269th Stc New Hyde Park NY 11040 CL Carrier/Perry Continued page 69 hardwood block length dowel fuselage sheeting pivot bearing hook inserted through reinforcement retained wheel collar Although tall hook need retracted high-speed portion flight reduces drag avoids possibility tail hook will catch uneven joint deck takeoff common release uses Down elevator movement pushrod release tail hook latch pin usually As-in music wire often attached pushrod passes through loop attached tail hook Down elevator movement pulls pin retaining loop allows hook fall An alternative favored some use low throttle movement release tall hook Such arrangement requires additional wire tail does allow engine idled before takeoff should desire tail hook release mechanism SH Ringots Wildcat puts no tension pushrod hook retracted adjustable point release also can built force required release tail hook stronger force exerted latch weight elevator way hook less likely released accidentally after engine started Another feature hook released accidentally can latched up again simply raising retracted position also can latch itself up landing under right condi dons two methods holding tail hook down rubberband tension spring Kingfisher photos torsion spring Wildcat tension system can built hooks rubberbands nearly line up pivot point hook retracted reduces force latch mechanism increases springs lever arm tail hook extends method prefer Whatever method used force tail hook should strong enough prevent hook bouncing excessively landing yet strong prevent tail settling deck model placed gently its landing gear hook extended tail hook should extend no 60e horixontal 45c 3O probably better 60e extension can allow tail hook hold tail air unless spring tension reduced point hook will bounce excessively hook portion should shaped tail hook will catch hold arresting line both extended position model resting its landing gear positive down-stop should provided control extended position tail hook screw dowel block wood will serve ade quately Kingfisher uses piece steel cable control line between tail skid small loop end hook limit travel Wildcat relies torsion spring control extended position hook Richard L Perry Model Aviation 1810 Samuel Morse Dr Reston VA 22090 I When responding advertisers mention read about ModelAviation CL Ki-61/Felton Continued page 74 triangular balsa bracing Glue Cl right side fuselage dry glue left side fuselage Cl Attach fuel tank -in ply support fuel tank may attached support rubberbands Make pushrod /$2 wire -in sq spruce attach bellcrank along lead-out wires Install tank bellcrank assemblies gluing ply supports cardboard supports sides fuselage Glue fuselage sides together tail Glue Fl F2 place cover top fuselage sure bring fuel tubing fill overflow lines out during covering operations Cover bottom fuselage F3 through F6 Add Bulkheads through D top fuselage Cover bulkheads Dl has scored folded Add Bulkheads Dl E El F G top fuselage cover D2 Add remaining bulkheads H J top fuselage cover D3 Add three K bulkheads forward bottom fuselage cover D4 cowl made hollowed-out balsa block top half consists hollow block /$6 ply C4 glued front Drill hole C4 install blind nut back side before gluing balsa block glue block firewall removable bottom half cowl consists C2 hollow block C3 holes C2 must align Y32 dowels Firewall Cl aligned glue C2 back face hollow block hole C3 must align hole C4 top block aligned glue C3 front face lower block Sand carve hollow cowl block shape Test-fit engine cowl drill mounting holes KM-40 mount Use shaft extension give adequate spinner clearance Cut holes cowl block cylinder head exhaust needle valve Glue stabilizer fuselage Glue fin fuselage add balsa blocks side fin Sand blocks match fuselage contour Glue rud der fm trailing edge offset outside flying circle Make tail wheel 3/$z-in wire Bend shown place -in ply support wrap nylon thread smear glue dry glue place bottom fuselage cutout Make main gear %2-in wire shown Make gear fairings -in ply attach gear nylon gear clips Attach gear assemblies -in ply supports bottom wing nylon gear clips Make air sccop /$2 balsa glue bottom wing Finishing Paint trim model before final assembly overall model medi 164Model Aviation Add 20% postage Send 25 catalog urn gray dark green camouflage top fin spinner Curtiss blue lettering trim made MonoKote roundels red num bers white Make canopy thin plastic epoxy-glue fuselage Outline canopy thin strips MonoKote aileron flap outlines black MonoKote Final assembly Glue wing fuselage Pass lead-out wires through wingtip line guide tie Attach nylon control horn elevator hookup pushrod Attach 3-in wheels main gear 1-in wheel tail gear Attach 11-6 prop 2-in spinner engine airplane now complete sure balance model point shown plans RC Hi-Tech 2002/Hunt Continued page 97 next flight proceeded uneventfully until dived aircraft maximum speed high-speed flyby camera just about point aircraft pitched downward heard loud buzzing sound above engine/pipe noise After landing inspected aircraft found nothing unusualno nicked blades noth ing obviously loose fan unit itself Since noise started aircraft pitched nose down reasoned fan blades might have stalled theory seemed have merit argument being fan inlet below fuselage being shielded canard wing obstructing airflow fan causing blades stall high rpm Another observation strengthened theory soon noise occurred aircraft slowed like hit brick wall nose well down would expect rapid descent blades stalled thrust forward speed would significantly reduced Returning home expecting cut cheater hole Eee Gads top fuselage found real problem specting MonoKote aileron hinge found either torn completely separated wing both left right aileron tips Assuming severe aileron flutter could cause proceeded stiffen entire aileron con trol system included previously mentioned replacement /32 wire torque rod -in wire replacement Nyrods cable Subsequent flights showed modification alleviated flutter problem Now problems have remedied does fly Fast smooth slow power Takeoffs gorounds rival overpowered sport ships Unfortunately wing loading ap proaching 30 oz/sq ft aircraft must handled gingerly during dead-stick landings will stall wing tip spin like heavy Scale model will notice loss pitch authority have found during few dead-stick landings have perform nose hard keep up already slightly up may seem strange against con ventional flying practices must keep nose level slightly high during approach order perform flared deadstick landing aircraft other condition should aware engine cah overheat left throttle position sitting motionless ground Since cylin der head entirely out wake fan forward motion friend have flown pusher-type aircraft have very likely experienced problem yourself Construction/modifications Construction HT-2002 almost identical HT-200 1 SO will describe changes will also spend some time des cribing construction RK-740 fan unit peculiar engine used OS Max 46 YR DF its installation HT 2002 new forebody constructed -in sheet well solid block balsa Cut out two inboard two out board -in sheet balsa fuselage sides laminate gap-filling cyanoacrylate CyA inboard sheet full length F5 outboard sheet foreshortened September1986 165