/ U 0 Li reling press pipe oniy way compete 1 Stunt aerodynamics event fully developed last Team Trials demonstrated difference between performance conventional 60-powered airplane 58 Model Aviation 4 the tuned- pipe 40 less scatter between judges several very fine large engines coming scene Superligre 51 Discovery Retro 55 Ukraine Double Star 60 Moldova felt time once again explore aerodynamic avenues improved performance Using conventional engines allows time devoted airplane since engines relatively trouble-free easy adjust through air intake compression changes compared piped engines discussions Bill Netzeband seemed combination Humbug concept characterized midwing configuration coupled very large high-aspect-ratio stabilizer/elevator optimum use flaps could lead interesting result Since effect flaps Humbug could predetermined confidence decided make flapto-elevator ratio adjustable over large range Since associated drag flaps also unpredictable decided build airplane numerous engines could installed minimum cutting airframe dural landing gear used allow easy replacement prop clearance required two-position mounting pattern ensured safe takeoffs grass asphalt surfaces tank compartment made large enough ailow whatever capacities anticipated various candidate engines enough vertical room shimming ensure run characteristics compromised old trick incorporating finite amount play flapHumbug 666 Weight Data Total moments 21293 Component Moment WtArm Total Total weight5825 ounces Wing covered w/pushrod Stab/elevator/horn covered Booms covered Glue assemble above Tail wheel/stooge mount Rudder mechanism Tip wt Paint/fillets fuselage Pushrod/bracesflap elevator Total moments 21302 Landing gear/wheels Eng/prop/spinner/muffler Tank Fuselage w/gear mount Filter/eng bolts/tank shims 1975 350 150 50 25 25 75 350 100 250 1400 200 850 25 366 2030 1250 1400 2275 2300 0 550est 1325 250 1175 700 300 1075 7228 7105 1875 700 569 575 0 1925 1325 625 16450 1400 2550 268 Structural weights Booms Wing Stab/elevator Fuselage Struct wt 100 1600 2 oz extra flaps 250 850 2800 48% total Finish Covering Paint fuselage/fillets Finish wt Projected minimum weight 5625 525 350 875 May 1995 59 Very large control surfaces essential Humbugs author Humbug 666 Model has near-conventional exceptional performance High-aspect-ratio stab appearance unconventional aerodynamics Type CL Stunt Wingspan 53 3/4 inches Engine SuperTigre 51/Discovery Retro 55 Flying Weight 58 ounces Construction Built-up sheet-covered wing Covering/finish Dope 0 OMISS COSSTHUCTION NOTUE WINO MUD BE BJILTIN105000 SlEETMOTTO MOUNTS0118 PLY HELLCOANS MOUNTt-~TWO HALO ES INSTEAD OF ONE PIECE 00 SELECTLEASHES EOOE THAT OPTION 000A SECOND CENTER HEB DHWIOSU PLY SPAHFIBEHALASS ENTESIOU BALSA SHEET-TOPOH PLO FIREWALLOH- OULHIS HELLCHOSE WING CS BALSA SHEET MOTII SIHES IEl/____________ FISELDUE NOTESEE TEOT U PHOTOS EDT DETAILS ___________Ii ELEAD DOT AIIS --L IH BALSA STEET SPAR IS SHEPENOENTLY DOJUSTUW.E-IT2PLT-WINA TIP WEIAIIT MOO ______________________OS BOTTOB OP USA TIP ____________________I 4---UIIii __ T ____OPTIONAL 108 ELY HEAD NGPLANHUN TOPVIEW7 00RHO AINOESNOTE USD0BALSA SOLESFLAP HASTHAILINA tII- rniLITHEICALI SLOCOSOILIOAN LEAD WINS TIPS OUT CARLES IOU BALSA SHEET --END100 BALSA_SHEET IOU SPRUCE CS2PLT CONE RITOPIODY POINT WS BALM SIDES -FOR RARE RARHER CO BALSA USEET ISIHrBALSOCIURAISA WINO -O----~- -. 0HZ ELTOUTSIDE HISCOCESH AMOM CONBIARARLE OPTIONOISCOOEHTSIHESARFACE WOULD BE ST SIMUFFLER LOCATIONIONA PLHTAIIRHEELIN BETWEEN ISEE TEOT EDO DETAIL500 010WA DES IPOWER INFORMATIONOATCD TCH R NHEHNTSNOTE BAILS HATCH ON IAHUEUJRHOz- WING PATTERNS MODEL AVIATION SPECIFICATIONSLOCRALSA SHEET _________ HUMBUG 666 FUSELAGE LENATH FU POP FUSE____________________ WIND SPAS S5000DESISNED BY ROBERT BARON INKED PLAN BY OE DEMARCO RIM ORUA UNO SA IN STABILIZER SPAS OS-TOR REIAST.NO 02 UNOISE NI TO 55 to-elevator connection explored making feature adjustable along flap-to-elevator ratio Humbugs wing area 660 square inches midrange contemporary Stunt airplanes weight 58 ounces also very typical present-day airplanes Consequently performance increases perceived improvements handling ease adjustment can attributed aerodynamics rather unusually low wing loading flaps first placed between booms because structurally natural thing Using portion between booms flaps minimized prospect tip stalling before center wing booms could conceivably add efficiency flaps acting tip plates original engine Fox 40 flap-to-elevator ratio set 66 After few short flights evident power would needed make airplane perform competitively 60%-span flaps moving much less elevator clear drag too much engine wing could induced stall hard cornersAn OS FSR 45 slightly detuned Tom Dixon installed significant increase power over Fox 40 model immediately showed promise performing par fullspan flapped models After trying assortment props l15x5SmadefromaZinger 12x6 appeared provide good balance vertical thrust comfortable lap speeds 50-52-second range time serious testing various flap-to-elevator ratios began 45 easily pulling model around 70-foot lines first increased flap travel provide one-toone flap/elevator ratio corners sharper plane easier fly through maneuvers although level flight still required more-than-average attention Tom Dixon have joked little good too much just about right have since revised too much still insufficient Following premise increased flap travel 135 flap/100 elevator Again corners sharper airplane became still easier fly ratio plane could hammered hard maneuver no sign dropping inducing stall time increased drag showed up potential problem flying outside loop entered 300 elevation using full control maneuver resulted bottom loop still having approximately 10 feet clearance ground Try maneuver piped airplane see safe feels full control flight measured wrapping wire leadouts measuring travel used after wrap pushed leadout guide full control measured approximately 290 flap 220 elevator using full control complete outside loop model would slow visibly just start wobble indicating approaching tip stall point Humbugs handling characteristics very pleasant begged question what would result power installed went SuperTigre 51 coupled plastic spinner lightweight expansion muffler weighed no FSR 45 original metal spinner Adamisin muffler no CC weight change significant increase torque now tap result using same prop no change level-flight speed fullcontrol outside loop resulted clean tight loop no wobble exit now airplane could caused stall wobble regardless control input yet still extremely competitive performance increased torque hence braking action 51 Humbug easier fly since acceleration vertical dive reduced 45 Time duration wingover beginning pullup end pullout mere 302 seconds theoretical time 50-second lap assuming corner radius 15 feet would 269 seconds no loss airspeed 3 second lost due plane slowing through corner climbing vertically demonstrates significant vertical capability provided 51 also apparent efficiency model creating excessive drag developing lift through corner increased torque 51 decided once again try 11 flap-to-elevator ratio since chance would produce tighter corner 1351 ratio Sure enough corner tighter came price noticeably slowing previous ratio increase torque 51 sharp increase drag too much engine wobble likely due tip stall could induced high control inputs now appeared have stumbled onto new way trim maximum performance CL Stunter optimize flap-toelevator ratio past flying just below stall achieved reducing total control travel moving CG forward Both techniques lead reduced performance over provided optimizing flap-to-elevator ratio Much test flying done very light 0-2 mph wind has advantage allowing imbalance trim easily spotted since wind factor flights under conditions clearly demonstrated importance having engine power come off classic Stunt fashion May1995 61 IKON NWST Since 1977 IKON offers largest selection giant scale kits world order kits call 1-800-327-7198 catalog fine kits send $4 00 adjusting compression increase power during two-cycle portion can altered too little compression airplane slows too much begins lose tension too much compression airplane lurches surge power becomes unbalanced leading wobble Flying under marginal conditions emphasized delicate balance between two- four-cycle power having twofour break important smooth execution pattern control system installed minimal play using Delrin bellerank Du-Bro ball-end sockets flap elevator horns Note angle horns flap elevator angle bellcrank pushrod flap horn created bellerank location behind main spar angle elevator pushrod flap elevator horns due midwing configuration leads unequal travel unless controls installed per plans CC 20% mean aerodynamic chord combined large stabilizer indicated Humbug would stableit However level flight still required concentration maintain smoothness began experiment varying amounts controlled play introduced elevator horn removed ball socket sleeved retaining screw socket different sized tubing safetyed arrangement washer screw Varying amounts free play can incorporated control system changing other variable found sufficient play allow trailing edge elevator move 1/ inch total flaps restrained airplane could immediately flown easily level flight wingover apparent model maintaining accurate track testing particularly good day smooth air cloudless blue sky Under conditions could see smoke trail muffler confirmed track wingover extremely straight anticipating dead spot intersection horizontal vertical eights due play controls could detect Putting play elevator-to-flap linkage appears rare instances clear benefit no apparent downside CONSTRUCTION Fabrication Humbug 666 conventional CL Stunt models few building techniques worthy note original model built using conventional open-bay wing construction covered 21st Century cloth Although somewhat easier apply MonoKote 21st Century material contributed little stiffness wing torsion noticeably weaker MonoKote regard addition weight penalty compared MonoKote approximately two ounces Since has established stiffer airframes perform much better windy weather construction changed sheet-covered wing dope finish weight penalty secondgeneration airplane weight additional planking solid-sheet flaps shown drawing save about two ounces over complex built-up sheet flaps followed airfoil original hinging prototype done ends flap stiffness required precluded lightening original flaps cutting out sectionsAvailable data seems indicate no aerodynamic benefit having flaps continuation airfoil compared simpler flat flap used majority Stunt models faired-in flap looked good plans lost its appeal once actual building took place recommend wing tail built finished exclusive color separately fuselage Knowing weights wing tail well fixed hardware possible determine nose length summing moments individual components such center gravity located per theplans no ballast required nose length shown plans reflects best estimates based original model should very close optimum nose length will depend component weights engine selection finish weight spinner etc plan shows Discovery Retro 55 engine soon imported Ukraine distributed Tom Dixon engine has front intake rear exhaust sold very lightweight muffler powerbased direct comparison tests run 12 x 6 Zingeris SuperTigre 51 weight same An engine similar motor Discovery Retrothe Vorohive stunt engine Moscowis also expected imported later year SuperTigre 51 however has demonstrated work very well design readily available muffler being midfuselage instead outside eliminates eccentric weight drag side-exhaust engine would suggest increasing engine size 60 because weight penalty engine fuel tank structure fuel building fuselage make crutch consisting two engine bearers glued cross-grained 1/2-inch spacer glue joint should made very flat surface such piece glass hard table Mount two aluminum rails engine bearers small screws have countersunk blow surface aluminum rails prevent local crushing 62 Model Aviation R ACE 1/4 SCALE 80 WACO UPF-7 1/5 SCALE 73 MONOCOUPE D-145 1/4 SCALE 96 F R N ED EI MLITY iNTEGRITY SERVICE QtLALrTY UTEGUTV SERVICE QJJAL TTY INTEGRITY SERVICE 5O S 0AFTEDT 395O-AVaUetBlvd WALNUCA91789N ci U ci WA T PE RR 0 0 F CALL OR WRITE FOR FREE U HOT BOX FLIGHT SUPPORT FAX 315 5484099 Send Dollar Cede loq dealer first en Residents add 7% BROCHURE Li no 0 no J0 5 Li no 70 no engine bearer engine tightened down Make aluminum rails flat parallel sanding crutch assembly sandpaper laying hard flat surface crutch assembly incorporated fuselage assured engine casing will distorted slight misalignments rest fuselage Assembly fuselage sides together crutch plywood bulkhead just forward wing best done fuselage upside down flat surface using slow-curing epoxy entire fuselage built top block bottom sheet tack-glued place shaping sanding completed prior installation wing top block removed hollowed wall thickness cowl details should also completed time Installation booms stabilizer pushrod assembly wing done prior fuselage installation nature booms pretty much assures accurate alignment stabilizer incidence provided booms cut accurately However always good idea check stabilizer Robart incidence meter misalignment will result poor handling characteristics fuselage now glued wing/tail assembly taking care make cutout fuselage stabilizer good fit Again use slow-curing epoxy provide time accurately align fuselage Once confirmed controls operate smoothly gear mount bottom block top block can installed Note pushrod flap elevator made composite stiffness adjustable feature control system does allow pushrod braces used fuselage install top block slow-curing epoxy using masking tape position block until glue dries slow-curing epoxy provides superior bond allows ample time accurately position components reason use critical operations alignment takes precedence over speed assembly Trimming flying similar other Stunter Determine engine running reliably provides lap times 50-52 seconds 70 feet line best prop pitch between 5/4 51/3 inches using Prather pitch gauge very important sand blades pitch props off pitch least /2 inch Rev-Up blades tend /2-1 inch low Zingers tend fairly close constant blade stations No commercial props provide exact pitches required best performance given design flier should become comfortable altering pitch commercial props suit particular airplane initial center gravity should very close shown plans 64 Model Aviation e Off Knees I4th 3001b Seat Capacity nded Scale VOlbnetera Monitor RX& 7X Charge 4-Automatic Glow Plug Driver Top Quality Power Panel ted Fuseci Master Panel Control Switches NIcad Glow Battery Charger 12v Starter Outlet t 12V Glow Fuel Pump Fuel/Drain Switch 5- COMPARIMENT LIFT PliopA SroIlAOEThAY #Hoids 2 12V4amp Gell Cell Batteries Sure Starts #Automatioally Monitors Charge Status 12v Battery #Enough Storage Carry/Store 4 Transmitters #NEW- FUEL PLATFO0V 32oz FUEL BOTTLE FUEL LINE Wq NdIIWraVRCCUtEd TOLL FREE 1-500-468-2692 Mar West Mfg & Diet Co Inc 3339 Fitzgerald Rd Suite Rancho Cordova CA 95742 TEL 916 961-4 703 FAX 916983-1923 DARNED GOOD AIRMEN Lightest pitets eOa ass Seeds Bust Pilot KitMode USA #1081/8scale.$695 #1061/6scale795 #1051/5scale895 #1041/4scale995 #1031/3 scale.1595 #308-1/8 jet695 #307-1/7 jet795 Full Body Pilot Kit #20o6s ae$995 #2055s ae095 #2044sae95 #2033sae95 V wing high level flight low inverted flight likely wing warped rigid construction allsheet wing requires time-honored tradition tweaking flaps level wings sure however elevators parallel another since large empennage design sufficiently powerful roll airplane Set original control elevator horn such flaps move 135 elevator moving 100 wings level engine rnnning well begin flying various hard-corner maneuvers such inside square level flight speed close 50 seconds per lap engine lacks power maneuvers reduce head clearance 005 inch increments engine tends come too hard maneuvers runs too slowly level flight may overcompressed requiring additional head shims flights conducted 10% nitro 24% lubricant Taffinder PA fuel Provided airspeed gives lap times low-five-second range wings level leadout position can adjusted use leadout position counteract precession well trim model maneuvering independent leadout adjustment line permits Generally leadouts too far forward will loss tension above 450 leadouts too far back line tension will excessive level flight will drop off significantly maneuvers due excessive yawTip weight can also adjusted time first indication tip weight insufficient outside wing will up both upright inverted Also insufficient tip weight will lead loss tension above 450 Too much tip weight will cause violent wobble first last corner triangle Experience always best asset trimming out Stunter above sequence adjusting will help get sense what adjustment does Once have adjusted engine leadouts tip weight center gravity can move changing flap-toelevator ratio 135 100 determine like performance airplane Remember time change horn location elevator has corresponding change handle width compensate change control rate evaluation have validity Humbug 666 has demonstrated still room improvement design arena need settle enlarged versions Nobler willing explore new territory has also underscored value building much adjustment possible long weight strength alignment compromised once again adage no substitute cubic dollars Stunt models cubic inches rings true 4The Most Excitement Model Aviation Kit feature month Fling Thing SAIJ Hand launch glider 565-in span 340 in2 14 oz super launches balsa const complete info send us long SASE Send us ad orig receipt box end label receive $2 rebate Expires 4-31-95 Future FlightS 1995TM 1256 Prescott Ave Sunnyvale CA 94089 408735-8260 voice/Fax E-mail KWING@AOLCOMI Losing control can nightmare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience modeling radio repair So avoid inflated repair costs undue service time -- call Radio South fast economical in-house radio service can depend Radio SouthFub K ~jAM13tSie 3702 N Pacerepair information 904 4340909 800-962-7802 Pensacola FL 32505 Toll Free Order Line Orders please HAND LAUNOK RC SALPLANES 15 Sagitta ii span bait balsa heetnd foam wing pip ralsa fasa 7032 airfoil rrea 335 sq 7 oz refom micm PC install Kit LAUNCH BY HI START OR HAND THROW Mini Hi Start easy launches 150 length 30 1/8 00 rubber 120 tom line wood-real convenient ground base system does require hammer set up use Perfect launching 15 M HL sailpianes small areas Kit $2995 plan s-s sit-i Ipree s/h erdnred model kitl 15 M Jouster es span bolt balsacrans stereo & voeo equipment ann mucn sheeted foam wing pip balsa fase 7032 airfoil Quality aluminum body area 3en sq 5 no Two high quality bristle brushes before miom PC install Two interchangeable directional wends Operates sIngle 9 Volt Alkaline battery Inol included lit5$4995 Kits easy construct ana fly use spray A/C adapter loptionall Oneyearwarranly contact cement wing sheeting Complete r CALL TOLL FREE instructions flying tips included Wings have 007MINIVAC built tip wash out easy flying Thermal flying 7664O2 fun relaxing now inexpensive Send obeok money order d Check Money Order F T Bench Aerotech ox 509 Dept Ml Glendale CA 91209 58030 Cyrenus Washington MI 48094 Dealer Inquiries 818-244-6888 Fax 818-244-5858 810-781-7018We accept VISA MC AMEX SAME DAY SHIPMENT HEEDV Antiques Military uiviiian Helicopters Sailolanes worlds largest aircraft documentation 5500 different full color photo studies 19051995 30000 3-view line drawings New 1995 Catalog/Guide 168 pages Only $800 Canada $900 Overseas $1400 Bob Bankas Scale Model Research 3114 Yukon Avenue e Costa Mesa CA 92626 979-WJa May 1995 65
Edition: Model Aviation - 1995/05
Page Numbers: 58, 59, 60, 61, 62, 64, 65
/ U 0 Li reling press pipe oniy way compete 1 Stunt aerodynamics event fully developed last Team Trials demonstrated difference between performance conventional 60-powered airplane 58 Model Aviation 4 the tuned- pipe 40 less scatter between judges several very fine large engines coming scene Superligre 51 Discovery Retro 55 Ukraine Double Star 60 Moldova felt time once again explore aerodynamic avenues improved performance Using conventional engines allows time devoted airplane since engines relatively trouble-free easy adjust through air intake compression changes compared piped engines discussions Bill Netzeband seemed combination Humbug concept characterized midwing configuration coupled very large high-aspect-ratio stabilizer/elevator optimum use flaps could lead interesting result Since effect flaps Humbug could predetermined confidence decided make flapto-elevator ratio adjustable over large range Since associated drag flaps also unpredictable decided build airplane numerous engines could installed minimum cutting airframe dural landing gear used allow easy replacement prop clearance required two-position mounting pattern ensured safe takeoffs grass asphalt surfaces tank compartment made large enough ailow whatever capacities anticipated various candidate engines enough vertical room shimming ensure run characteristics compromised old trick incorporating finite amount play flapHumbug 666 Weight Data Total moments 21293 Component Moment WtArm Total Total weight5825 ounces Wing covered w/pushrod Stab/elevator/horn covered Booms covered Glue assemble above Tail wheel/stooge mount Rudder mechanism Tip wt Paint/fillets fuselage Pushrod/bracesflap elevator Total moments 21302 Landing gear/wheels Eng/prop/spinner/muffler Tank Fuselage w/gear mount Filter/eng bolts/tank shims 1975 350 150 50 25 25 75 350 100 250 1400 200 850 25 366 2030 1250 1400 2275 2300 0 550est 1325 250 1175 700 300 1075 7228 7105 1875 700 569 575 0 1925 1325 625 16450 1400 2550 268 Structural weights Booms Wing Stab/elevator Fuselage Struct wt 100 1600 2 oz extra flaps 250 850 2800 48% total Finish Covering Paint fuselage/fillets Finish wt Projected minimum weight 5625 525 350 875 May 1995 59 Very large control surfaces essential Humbugs author Humbug 666 Model has near-conventional exceptional performance High-aspect-ratio stab appearance unconventional aerodynamics Type CL Stunt Wingspan 53 3/4 inches Engine SuperTigre 51/Discovery Retro 55 Flying Weight 58 ounces Construction Built-up sheet-covered wing Covering/finish Dope 0 OMISS COSSTHUCTION NOTUE WINO MUD BE BJILTIN105000 SlEETMOTTO MOUNTS0118 PLY HELLCOANS MOUNTt-~TWO HALO ES INSTEAD OF ONE PIECE 00 SELECTLEASHES EOOE THAT OPTION 000A SECOND CENTER HEB DHWIOSU PLY SPAHFIBEHALASS ENTESIOU BALSA SHEET-TOPOH PLO FIREWALLOH- OULHIS HELLCHOSE WING CS BALSA SHEET MOTII SIHES IEl/____________ FISELDUE NOTESEE TEOT U PHOTOS EDT DETAILS ___________Ii ELEAD DOT AIIS --L IH BALSA STEET SPAR IS SHEPENOENTLY DOJUSTUW.E-IT2PLT-WINA TIP WEIAIIT MOO ______________________OS BOTTOB OP USA TIP ____________________I 4---UIIii __ T ____OPTIONAL 108 ELY HEAD NGPLANHUN TOPVIEW7 00RHO AINOESNOTE USD0BALSA SOLESFLAP HASTHAILINA tII- rniLITHEICALI SLOCOSOILIOAN LEAD WINS TIPS OUT CARLES IOU BALSA SHEET --END100 BALSA_SHEET IOU SPRUCE CS2PLT CONE RITOPIODY POINT WS BALM SIDES -FOR RARE RARHER CO BALSA USEET ISIHrBALSOCIURAISA WINO -O----~- -. 0HZ ELTOUTSIDE HISCOCESH AMOM CONBIARARLE OPTIONOISCOOEHTSIHESARFACE WOULD BE ST SIMUFFLER LOCATIONIONA PLHTAIIRHEELIN BETWEEN ISEE TEOT EDO DETAIL500 010WA DES IPOWER INFORMATIONOATCD TCH R NHEHNTSNOTE BAILS HATCH ON IAHUEUJRHOz- WING PATTERNS MODEL AVIATION SPECIFICATIONSLOCRALSA SHEET _________ HUMBUG 666 FUSELAGE LENATH FU POP FUSE____________________ WIND SPAS S5000DESISNED BY ROBERT BARON INKED PLAN BY OE DEMARCO RIM ORUA UNO SA IN STABILIZER SPAS OS-TOR REIAST.NO 02 UNOISE NI TO 55 to-elevator connection explored making feature adjustable along flap-to-elevator ratio Humbugs wing area 660 square inches midrange contemporary Stunt airplanes weight 58 ounces also very typical present-day airplanes Consequently performance increases perceived improvements handling ease adjustment can attributed aerodynamics rather unusually low wing loading flaps first placed between booms because structurally natural thing Using portion between booms flaps minimized prospect tip stalling before center wing booms could conceivably add efficiency flaps acting tip plates original engine Fox 40 flap-to-elevator ratio set 66 After few short flights evident power would needed make airplane perform competitively 60%-span flaps moving much less elevator clear drag too much engine wing could induced stall hard cornersAn OS FSR 45 slightly detuned Tom Dixon installed significant increase power over Fox 40 model immediately showed promise performing par fullspan flapped models After trying assortment props l15x5SmadefromaZinger 12x6 appeared provide good balance vertical thrust comfortable lap speeds 50-52-second range time serious testing various flap-to-elevator ratios began 45 easily pulling model around 70-foot lines first increased flap travel provide one-toone flap/elevator ratio corners sharper plane easier fly through maneuvers although level flight still required more-than-average attention Tom Dixon have joked little good too much just about right have since revised too much still insufficient Following premise increased flap travel 135 flap/100 elevator Again corners sharper airplane became still easier fly ratio plane could hammered hard maneuver no sign dropping inducing stall time increased drag showed up potential problem flying outside loop entered 300 elevation using full control maneuver resulted bottom loop still having approximately 10 feet clearance ground Try maneuver piped airplane see safe feels full control flight measured wrapping wire leadouts measuring travel used after wrap pushed leadout guide full control measured approximately 290 flap 220 elevator using full control complete outside loop model would slow visibly just start wobble indicating approaching tip stall point Humbugs handling characteristics very pleasant begged question what would result power installed went SuperTigre 51 coupled plastic spinner lightweight expansion muffler weighed no FSR 45 original metal spinner Adamisin muffler no CC weight change significant increase torque now tap result using same prop no change level-flight speed fullcontrol outside loop resulted clean tight loop no wobble exit now airplane could caused stall wobble regardless control input yet still extremely competitive performance increased torque hence braking action 51 Humbug easier fly since acceleration vertical dive reduced 45 Time duration wingover beginning pullup end pullout mere 302 seconds theoretical time 50-second lap assuming corner radius 15 feet would 269 seconds no loss airspeed 3 second lost due plane slowing through corner climbing vertically demonstrates significant vertical capability provided 51 also apparent efficiency model creating excessive drag developing lift through corner increased torque 51 decided once again try 11 flap-to-elevator ratio since chance would produce tighter corner 1351 ratio Sure enough corner tighter came price noticeably slowing previous ratio increase torque 51 sharp increase drag too much engine wobble likely due tip stall could induced high control inputs now appeared have stumbled onto new way trim maximum performance CL Stunter optimize flap-toelevator ratio past flying just below stall achieved reducing total control travel moving CG forward Both techniques lead reduced performance over provided optimizing flap-to-elevator ratio Much test flying done very light 0-2 mph wind has advantage allowing imbalance trim easily spotted since wind factor flights under conditions clearly demonstrated importance having engine power come off classic Stunt fashion May1995 61 IKON NWST Since 1977 IKON offers largest selection giant scale kits world order kits call 1-800-327-7198 catalog fine kits send $4 00 adjusting compression increase power during two-cycle portion can altered too little compression airplane slows too much begins lose tension too much compression airplane lurches surge power becomes unbalanced leading wobble Flying under marginal conditions emphasized delicate balance between two- four-cycle power having twofour break important smooth execution pattern control system installed minimal play using Delrin bellerank Du-Bro ball-end sockets flap elevator horns Note angle horns flap elevator angle bellcrank pushrod flap horn created bellerank location behind main spar angle elevator pushrod flap elevator horns due midwing configuration leads unequal travel unless controls installed per plans CC 20% mean aerodynamic chord combined large stabilizer indicated Humbug would stableit However level flight still required concentration maintain smoothness began experiment varying amounts controlled play introduced elevator horn removed ball socket sleeved retaining screw socket different sized tubing safetyed arrangement washer screw Varying amounts free play can incorporated control system changing other variable found sufficient play allow trailing edge elevator move 1/ inch total flaps restrained airplane could immediately flown easily level flight wingover apparent model maintaining accurate track testing particularly good day smooth air cloudless blue sky Under conditions could see smoke trail muffler confirmed track wingover extremely straight anticipating dead spot intersection horizontal vertical eights due play controls could detect Putting play elevator-to-flap linkage appears rare instances clear benefit no apparent downside CONSTRUCTION Fabrication Humbug 666 conventional CL Stunt models few building techniques worthy note original model built using conventional open-bay wing construction covered 21st Century cloth Although somewhat easier apply MonoKote 21st Century material contributed little stiffness wing torsion noticeably weaker MonoKote regard addition weight penalty compared MonoKote approximately two ounces Since has established stiffer airframes perform much better windy weather construction changed sheet-covered wing dope finish weight penalty secondgeneration airplane weight additional planking solid-sheet flaps shown drawing save about two ounces over complex built-up sheet flaps followed airfoil original hinging prototype done ends flap stiffness required precluded lightening original flaps cutting out sectionsAvailable data seems indicate no aerodynamic benefit having flaps continuation airfoil compared simpler flat flap used majority Stunt models faired-in flap looked good plans lost its appeal once actual building took place recommend wing tail built finished exclusive color separately fuselage Knowing weights wing tail well fixed hardware possible determine nose length summing moments individual components such center gravity located per theplans no ballast required nose length shown plans reflects best estimates based original model should very close optimum nose length will depend component weights engine selection finish weight spinner etc plan shows Discovery Retro 55 engine soon imported Ukraine distributed Tom Dixon engine has front intake rear exhaust sold very lightweight muffler powerbased direct comparison tests run 12 x 6 Zingeris SuperTigre 51 weight same An engine similar motor Discovery Retrothe Vorohive stunt engine Moscowis also expected imported later year SuperTigre 51 however has demonstrated work very well design readily available muffler being midfuselage instead outside eliminates eccentric weight drag side-exhaust engine would suggest increasing engine size 60 because weight penalty engine fuel tank structure fuel building fuselage make crutch consisting two engine bearers glued cross-grained 1/2-inch spacer glue joint should made very flat surface such piece glass hard table Mount two aluminum rails engine bearers small screws have countersunk blow surface aluminum rails prevent local crushing 62 Model Aviation R ACE 1/4 SCALE 80 WACO UPF-7 1/5 SCALE 73 MONOCOUPE D-145 1/4 SCALE 96 F R N ED EI MLITY iNTEGRITY SERVICE QtLALrTY UTEGUTV SERVICE QJJAL TTY INTEGRITY SERVICE 5O S 0AFTEDT 395O-AVaUetBlvd WALNUCA91789N ci U ci WA T PE RR 0 0 F CALL OR WRITE FOR FREE U HOT BOX FLIGHT SUPPORT FAX 315 5484099 Send Dollar Cede loq dealer first en Residents add 7% BROCHURE Li no 0 no J0 5 Li no 70 no engine bearer engine tightened down Make aluminum rails flat parallel sanding crutch assembly sandpaper laying hard flat surface crutch assembly incorporated fuselage assured engine casing will distorted slight misalignments rest fuselage Assembly fuselage sides together crutch plywood bulkhead just forward wing best done fuselage upside down flat surface using slow-curing epoxy entire fuselage built top block bottom sheet tack-glued place shaping sanding completed prior installation wing top block removed hollowed wall thickness cowl details should also completed time Installation booms stabilizer pushrod assembly wing done prior fuselage installation nature booms pretty much assures accurate alignment stabilizer incidence provided booms cut accurately However always good idea check stabilizer Robart incidence meter misalignment will result poor handling characteristics fuselage now glued wing/tail assembly taking care make cutout fuselage stabilizer good fit Again use slow-curing epoxy provide time accurately align fuselage Once confirmed controls operate smoothly gear mount bottom block top block can installed Note pushrod flap elevator made composite stiffness adjustable feature control system does allow pushrod braces used fuselage install top block slow-curing epoxy using masking tape position block until glue dries slow-curing epoxy provides superior bond allows ample time accurately position components reason use critical operations alignment takes precedence over speed assembly Trimming flying similar other Stunter Determine engine running reliably provides lap times 50-52 seconds 70 feet line best prop pitch between 5/4 51/3 inches using Prather pitch gauge very important sand blades pitch props off pitch least /2 inch Rev-Up blades tend /2-1 inch low Zingers tend fairly close constant blade stations No commercial props provide exact pitches required best performance given design flier should become comfortable altering pitch commercial props suit particular airplane initial center gravity should very close shown plans 64 Model Aviation e Off Knees I4th 3001b Seat Capacity nded Scale VOlbnetera Monitor RX& 7X Charge 4-Automatic Glow Plug Driver Top Quality Power Panel ted Fuseci Master Panel Control Switches NIcad Glow Battery Charger 12v Starter Outlet t 12V Glow Fuel Pump Fuel/Drain Switch 5- COMPARIMENT LIFT PliopA SroIlAOEThAY #Hoids 2 12V4amp Gell Cell Batteries Sure Starts #Automatioally Monitors Charge Status 12v Battery #Enough Storage Carry/Store 4 Transmitters #NEW- FUEL PLATFO0V 32oz FUEL BOTTLE FUEL LINE Wq NdIIWraVRCCUtEd TOLL FREE 1-500-468-2692 Mar West Mfg & Diet Co Inc 3339 Fitzgerald Rd Suite Rancho Cordova CA 95742 TEL 916 961-4 703 FAX 916983-1923 DARNED GOOD AIRMEN Lightest pitets eOa ass Seeds Bust Pilot KitMode USA #1081/8scale.$695 #1061/6scale795 #1051/5scale895 #1041/4scale995 #1031/3 scale.1595 #308-1/8 jet695 #307-1/7 jet795 Full Body Pilot Kit #20o6s ae$995 #2055s ae095 #2044sae95 #2033sae95 V wing high level flight low inverted flight likely wing warped rigid construction allsheet wing requires time-honored tradition tweaking flaps level wings sure however elevators parallel another since large empennage design sufficiently powerful roll airplane Set original control elevator horn such flaps move 135 elevator moving 100 wings level engine rnnning well begin flying various hard-corner maneuvers such inside square level flight speed close 50 seconds per lap engine lacks power maneuvers reduce head clearance 005 inch increments engine tends come too hard maneuvers runs too slowly level flight may overcompressed requiring additional head shims flights conducted 10% nitro 24% lubricant Taffinder PA fuel Provided airspeed gives lap times low-five-second range wings level leadout position can adjusted use leadout position counteract precession well trim model maneuvering independent leadout adjustment line permits Generally leadouts too far forward will loss tension above 450 leadouts too far back line tension will excessive level flight will drop off significantly maneuvers due excessive yawTip weight can also adjusted time first indication tip weight insufficient outside wing will up both upright inverted Also insufficient tip weight will lead loss tension above 450 Too much tip weight will cause violent wobble first last corner triangle Experience always best asset trimming out Stunter above sequence adjusting will help get sense what adjustment does Once have adjusted engine leadouts tip weight center gravity can move changing flap-toelevator ratio 135 100 determine like performance airplane Remember time change horn location elevator has corresponding change handle width compensate change control rate evaluation have validity Humbug 666 has demonstrated still room improvement design arena need settle enlarged versions Nobler willing explore new territory has also underscored value building much adjustment possible long weight strength alignment compromised once again adage no substitute cubic dollars Stunt models cubic inches rings true 4The Most Excitement Model Aviation Kit feature month Fling Thing SAIJ Hand launch glider 565-in span 340 in2 14 oz super launches balsa const complete info send us long SASE Send us ad orig receipt box end label receive $2 rebate Expires 4-31-95 Future FlightS 1995TM 1256 Prescott Ave Sunnyvale CA 94089 408735-8260 voice/Fax E-mail KWING@AOLCOMI Losing control can nightmare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience modeling radio repair So avoid inflated repair costs undue service time -- call Radio South fast economical in-house radio service can depend Radio SouthFub K ~jAM13tSie 3702 N Pacerepair information 904 4340909 800-962-7802 Pensacola FL 32505 Toll Free Order Line Orders please HAND LAUNOK RC SALPLANES 15 Sagitta ii span bait balsa heetnd foam wing pip ralsa fasa 7032 airfoil rrea 335 sq 7 oz refom micm PC install Kit LAUNCH BY HI START OR HAND THROW Mini Hi Start easy launches 150 length 30 1/8 00 rubber 120 tom line wood-real convenient ground base system does require hammer set up use Perfect launching 15 M HL sailpianes small areas Kit $2995 plan s-s sit-i Ipree s/h erdnred model kitl 15 M Jouster es span bolt balsacrans stereo & voeo equipment ann mucn sheeted foam wing pip balsa fase 7032 airfoil Quality aluminum body area 3en sq 5 no Two high quality bristle brushes before miom PC install Two interchangeable directional wends Operates sIngle 9 Volt Alkaline battery Inol included lit5$4995 Kits easy construct ana fly use spray A/C adapter loptionall Oneyearwarranly contact cement wing sheeting Complete r CALL TOLL FREE instructions flying tips included Wings have 007MINIVAC built tip wash out easy flying Thermal flying 7664O2 fun relaxing now inexpensive Send obeok money order d Check Money Order F T Bench Aerotech ox 509 Dept Ml Glendale CA 91209 58030 Cyrenus Washington MI 48094 Dealer Inquiries 818-244-6888 Fax 818-244-5858 810-781-7018We accept VISA MC AMEX SAME DAY SHIPMENT HEEDV Antiques Military uiviiian Helicopters Sailolanes worlds largest aircraft documentation 5500 different full color photo studies 19051995 30000 3-view line drawings New 1995 Catalog/Guide 168 pages Only $800 Canada $900 Overseas $1400 Bob Bankas Scale Model Research 3114 Yukon Avenue e Costa Mesa CA 92626 979-WJa May 1995 65
Edition: Model Aviation - 1995/05
Page Numbers: 58, 59, 60, 61, 62, 64, 65
/ U 0 Li reling press pipe oniy way compete 1 Stunt aerodynamics event fully developed last Team Trials demonstrated difference between performance conventional 60-powered airplane 58 Model Aviation 4 the tuned- pipe 40 less scatter between judges several very fine large engines coming scene Superligre 51 Discovery Retro 55 Ukraine Double Star 60 Moldova felt time once again explore aerodynamic avenues improved performance Using conventional engines allows time devoted airplane since engines relatively trouble-free easy adjust through air intake compression changes compared piped engines discussions Bill Netzeband seemed combination Humbug concept characterized midwing configuration coupled very large high-aspect-ratio stabilizer/elevator optimum use flaps could lead interesting result Since effect flaps Humbug could predetermined confidence decided make flapto-elevator ratio adjustable over large range Since associated drag flaps also unpredictable decided build airplane numerous engines could installed minimum cutting airframe dural landing gear used allow easy replacement prop clearance required two-position mounting pattern ensured safe takeoffs grass asphalt surfaces tank compartment made large enough ailow whatever capacities anticipated various candidate engines enough vertical room shimming ensure run characteristics compromised old trick incorporating finite amount play flapHumbug 666 Weight Data Total moments 21293 Component Moment WtArm Total Total weight5825 ounces Wing covered w/pushrod Stab/elevator/horn covered Booms covered Glue assemble above Tail wheel/stooge mount Rudder mechanism Tip wt Paint/fillets fuselage Pushrod/bracesflap elevator Total moments 21302 Landing gear/wheels Eng/prop/spinner/muffler Tank Fuselage w/gear mount Filter/eng bolts/tank shims 1975 350 150 50 25 25 75 350 100 250 1400 200 850 25 366 2030 1250 1400 2275 2300 0 550est 1325 250 1175 700 300 1075 7228 7105 1875 700 569 575 0 1925 1325 625 16450 1400 2550 268 Structural weights Booms Wing Stab/elevator Fuselage Struct wt 100 1600 2 oz extra flaps 250 850 2800 48% total Finish Covering Paint fuselage/fillets Finish wt Projected minimum weight 5625 525 350 875 May 1995 59 Very large control surfaces essential Humbugs author Humbug 666 Model has near-conventional exceptional performance High-aspect-ratio stab appearance unconventional aerodynamics Type CL Stunt Wingspan 53 3/4 inches Engine SuperTigre 51/Discovery Retro 55 Flying Weight 58 ounces Construction Built-up sheet-covered wing Covering/finish Dope 0 OMISS COSSTHUCTION NOTUE WINO MUD BE BJILTIN105000 SlEETMOTTO MOUNTS0118 PLY HELLCOANS MOUNTt-~TWO HALO ES INSTEAD OF ONE PIECE 00 SELECTLEASHES EOOE THAT OPTION 000A SECOND CENTER HEB DHWIOSU PLY SPAHFIBEHALASS ENTESIOU BALSA SHEET-TOPOH PLO FIREWALLOH- OULHIS HELLCHOSE WING CS BALSA SHEET MOTII SIHES IEl/____________ FISELDUE NOTESEE TEOT U PHOTOS EDT DETAILS ___________Ii ELEAD DOT AIIS --L IH BALSA STEET SPAR IS SHEPENOENTLY DOJUSTUW.E-IT2PLT-WINA TIP WEIAIIT MOO ______________________OS BOTTOB OP USA TIP ____________________I 4---UIIii __ T ____OPTIONAL 108 ELY HEAD NGPLANHUN TOPVIEW7 00RHO AINOESNOTE USD0BALSA SOLESFLAP HASTHAILINA tII- rniLITHEICALI SLOCOSOILIOAN LEAD WINS TIPS OUT CARLES IOU BALSA SHEET --END100 BALSA_SHEET IOU SPRUCE CS2PLT CONE RITOPIODY POINT WS BALM SIDES -FOR RARE RARHER CO BALSA USEET ISIHrBALSOCIURAISA WINO -O----~- -. 0HZ ELTOUTSIDE HISCOCESH AMOM CONBIARARLE OPTIONOISCOOEHTSIHESARFACE WOULD BE ST SIMUFFLER LOCATIONIONA PLHTAIIRHEELIN BETWEEN ISEE TEOT EDO DETAIL500 010WA DES IPOWER INFORMATIONOATCD TCH R NHEHNTSNOTE BAILS HATCH ON IAHUEUJRHOz- WING PATTERNS MODEL AVIATION SPECIFICATIONSLOCRALSA SHEET _________ HUMBUG 666 FUSELAGE LENATH FU POP FUSE____________________ WIND SPAS S5000DESISNED BY ROBERT BARON INKED PLAN BY OE DEMARCO RIM ORUA UNO SA IN STABILIZER SPAS OS-TOR REIAST.NO 02 UNOISE NI TO 55 to-elevator connection explored making feature adjustable along flap-to-elevator ratio Humbugs wing area 660 square inches midrange contemporary Stunt airplanes weight 58 ounces also very typical present-day airplanes Consequently performance increases perceived improvements handling ease adjustment can attributed aerodynamics rather unusually low wing loading flaps first placed between booms because structurally natural thing Using portion between booms flaps minimized prospect tip stalling before center wing booms could conceivably add efficiency flaps acting tip plates original engine Fox 40 flap-to-elevator ratio set 66 After few short flights evident power would needed make airplane perform competitively 60%-span flaps moving much less elevator clear drag too much engine wing could induced stall hard cornersAn OS FSR 45 slightly detuned Tom Dixon installed significant increase power over Fox 40 model immediately showed promise performing par fullspan flapped models After trying assortment props l15x5SmadefromaZinger 12x6 appeared provide good balance vertical thrust comfortable lap speeds 50-52-second range time serious testing various flap-to-elevator ratios began 45 easily pulling model around 70-foot lines first increased flap travel provide one-toone flap/elevator ratio corners sharper plane easier fly through maneuvers although level flight still required more-than-average attention Tom Dixon have joked little good too much just about right have since revised too much still insufficient Following premise increased flap travel 135 flap/100 elevator Again corners sharper airplane became still easier fly ratio plane could hammered hard maneuver no sign dropping inducing stall time increased drag showed up potential problem flying outside loop entered 300 elevation using full control maneuver resulted bottom loop still having approximately 10 feet clearance ground Try maneuver piped airplane see safe feels full control flight measured wrapping wire leadouts measuring travel used after wrap pushed leadout guide full control measured approximately 290 flap 220 elevator using full control complete outside loop model would slow visibly just start wobble indicating approaching tip stall point Humbugs handling characteristics very pleasant begged question what would result power installed went SuperTigre 51 coupled plastic spinner lightweight expansion muffler weighed no FSR 45 original metal spinner Adamisin muffler no CC weight change significant increase torque now tap result using same prop no change level-flight speed fullcontrol outside loop resulted clean tight loop no wobble exit now airplane could caused stall wobble regardless control input yet still extremely competitive performance increased torque hence braking action 51 Humbug easier fly since acceleration vertical dive reduced 45 Time duration wingover beginning pullup end pullout mere 302 seconds theoretical time 50-second lap assuming corner radius 15 feet would 269 seconds no loss airspeed 3 second lost due plane slowing through corner climbing vertically demonstrates significant vertical capability provided 51 also apparent efficiency model creating excessive drag developing lift through corner increased torque 51 decided once again try 11 flap-to-elevator ratio since chance would produce tighter corner 1351 ratio Sure enough corner tighter came price noticeably slowing previous ratio increase torque 51 sharp increase drag too much engine wobble likely due tip stall could induced high control inputs now appeared have stumbled onto new way trim maximum performance CL Stunter optimize flap-toelevator ratio past flying just below stall achieved reducing total control travel moving CG forward Both techniques lead reduced performance over provided optimizing flap-to-elevator ratio Much test flying done very light 0-2 mph wind has advantage allowing imbalance trim easily spotted since wind factor flights under conditions clearly demonstrated importance having engine power come off classic Stunt fashion May1995 61 IKON NWST Since 1977 IKON offers largest selection giant scale kits world order kits call 1-800-327-7198 catalog fine kits send $4 00 adjusting compression increase power during two-cycle portion can altered too little compression airplane slows too much begins lose tension too much compression airplane lurches surge power becomes unbalanced leading wobble Flying under marginal conditions emphasized delicate balance between two- four-cycle power having twofour break important smooth execution pattern control system installed minimal play using Delrin bellerank Du-Bro ball-end sockets flap elevator horns Note angle horns flap elevator angle bellcrank pushrod flap horn created bellerank location behind main spar angle elevator pushrod flap elevator horns due midwing configuration leads unequal travel unless controls installed per plans CC 20% mean aerodynamic chord combined large stabilizer indicated Humbug would stableit However level flight still required concentration maintain smoothness began experiment varying amounts controlled play introduced elevator horn removed ball socket sleeved retaining screw socket different sized tubing safetyed arrangement washer screw Varying amounts free play can incorporated control system changing other variable found sufficient play allow trailing edge elevator move 1/ inch total flaps restrained airplane could immediately flown easily level flight wingover apparent model maintaining accurate track testing particularly good day smooth air cloudless blue sky Under conditions could see smoke trail muffler confirmed track wingover extremely straight anticipating dead spot intersection horizontal vertical eights due play controls could detect Putting play elevator-to-flap linkage appears rare instances clear benefit no apparent downside CONSTRUCTION Fabrication Humbug 666 conventional CL Stunt models few building techniques worthy note original model built using conventional open-bay wing construction covered 21st Century cloth Although somewhat easier apply MonoKote 21st Century material contributed little stiffness wing torsion noticeably weaker MonoKote regard addition weight penalty compared MonoKote approximately two ounces Since has established stiffer airframes perform much better windy weather construction changed sheet-covered wing dope finish weight penalty secondgeneration airplane weight additional planking solid-sheet flaps shown drawing save about two ounces over complex built-up sheet flaps followed airfoil original hinging prototype done ends flap stiffness required precluded lightening original flaps cutting out sectionsAvailable data seems indicate no aerodynamic benefit having flaps continuation airfoil compared simpler flat flap used majority Stunt models faired-in flap looked good plans lost its appeal once actual building took place recommend wing tail built finished exclusive color separately fuselage Knowing weights wing tail well fixed hardware possible determine nose length summing moments individual components such center gravity located per theplans no ballast required nose length shown plans reflects best estimates based original model should very close optimum nose length will depend component weights engine selection finish weight spinner etc plan shows Discovery Retro 55 engine soon imported Ukraine distributed Tom Dixon engine has front intake rear exhaust sold very lightweight muffler powerbased direct comparison tests run 12 x 6 Zingeris SuperTigre 51 weight same An engine similar motor Discovery Retrothe Vorohive stunt engine Moscowis also expected imported later year SuperTigre 51 however has demonstrated work very well design readily available muffler being midfuselage instead outside eliminates eccentric weight drag side-exhaust engine would suggest increasing engine size 60 because weight penalty engine fuel tank structure fuel building fuselage make crutch consisting two engine bearers glued cross-grained 1/2-inch spacer glue joint should made very flat surface such piece glass hard table Mount two aluminum rails engine bearers small screws have countersunk blow surface aluminum rails prevent local crushing 62 Model Aviation R ACE 1/4 SCALE 80 WACO UPF-7 1/5 SCALE 73 MONOCOUPE D-145 1/4 SCALE 96 F R N ED EI MLITY iNTEGRITY SERVICE QtLALrTY UTEGUTV SERVICE QJJAL TTY INTEGRITY SERVICE 5O S 0AFTEDT 395O-AVaUetBlvd WALNUCA91789N ci U ci WA T PE RR 0 0 F CALL OR WRITE FOR FREE U HOT BOX FLIGHT SUPPORT FAX 315 5484099 Send Dollar Cede loq dealer first en Residents add 7% BROCHURE Li no 0 no J0 5 Li no 70 no engine bearer engine tightened down Make aluminum rails flat parallel sanding crutch assembly sandpaper laying hard flat surface crutch assembly incorporated fuselage assured engine casing will distorted slight misalignments rest fuselage Assembly fuselage sides together crutch plywood bulkhead just forward wing best done fuselage upside down flat surface using slow-curing epoxy entire fuselage built top block bottom sheet tack-glued place shaping sanding completed prior installation wing top block removed hollowed wall thickness cowl details should also completed time Installation booms stabilizer pushrod assembly wing done prior fuselage installation nature booms pretty much assures accurate alignment stabilizer incidence provided booms cut accurately However always good idea check stabilizer Robart incidence meter misalignment will result poor handling characteristics fuselage now glued wing/tail assembly taking care make cutout fuselage stabilizer good fit Again use slow-curing epoxy provide time accurately align fuselage Once confirmed controls operate smoothly gear mount bottom block top block can installed Note pushrod flap elevator made composite stiffness adjustable feature control system does allow pushrod braces used fuselage install top block slow-curing epoxy using masking tape position block until glue dries slow-curing epoxy provides superior bond allows ample time accurately position components reason use critical operations alignment takes precedence over speed assembly Trimming flying similar other Stunter Determine engine running reliably provides lap times 50-52 seconds 70 feet line best prop pitch between 5/4 51/3 inches using Prather pitch gauge very important sand blades pitch props off pitch least /2 inch Rev-Up blades tend /2-1 inch low Zingers tend fairly close constant blade stations No commercial props provide exact pitches required best performance given design flier should become comfortable altering pitch commercial props suit particular airplane initial center gravity should very close shown plans 64 Model Aviation e Off Knees I4th 3001b Seat Capacity nded Scale VOlbnetera Monitor RX& 7X Charge 4-Automatic Glow Plug Driver Top Quality Power Panel ted Fuseci Master Panel Control Switches NIcad Glow Battery Charger 12v Starter Outlet t 12V Glow Fuel Pump Fuel/Drain Switch 5- COMPARIMENT LIFT PliopA SroIlAOEThAY #Hoids 2 12V4amp Gell Cell Batteries Sure Starts #Automatioally Monitors Charge Status 12v Battery #Enough Storage Carry/Store 4 Transmitters #NEW- FUEL PLATFO0V 32oz FUEL BOTTLE FUEL LINE Wq NdIIWraVRCCUtEd TOLL FREE 1-500-468-2692 Mar West Mfg & Diet Co Inc 3339 Fitzgerald Rd Suite Rancho Cordova CA 95742 TEL 916 961-4 703 FAX 916983-1923 DARNED GOOD AIRMEN Lightest pitets eOa ass Seeds Bust Pilot KitMode USA #1081/8scale.$695 #1061/6scale795 #1051/5scale895 #1041/4scale995 #1031/3 scale.1595 #308-1/8 jet695 #307-1/7 jet795 Full Body Pilot Kit #20o6s ae$995 #2055s ae095 #2044sae95 #2033sae95 V wing high level flight low inverted flight likely wing warped rigid construction allsheet wing requires time-honored tradition tweaking flaps level wings sure however elevators parallel another since large empennage design sufficiently powerful roll airplane Set original control elevator horn such flaps move 135 elevator moving 100 wings level engine rnnning well begin flying various hard-corner maneuvers such inside square level flight speed close 50 seconds per lap engine lacks power maneuvers reduce head clearance 005 inch increments engine tends come too hard maneuvers runs too slowly level flight may overcompressed requiring additional head shims flights conducted 10% nitro 24% lubricant Taffinder PA fuel Provided airspeed gives lap times low-five-second range wings level leadout position can adjusted use leadout position counteract precession well trim model maneuvering independent leadout adjustment line permits Generally leadouts too far forward will loss tension above 450 leadouts too far back line tension will excessive level flight will drop off significantly maneuvers due excessive yawTip weight can also adjusted time first indication tip weight insufficient outside wing will up both upright inverted Also insufficient tip weight will lead loss tension above 450 Too much tip weight will cause violent wobble first last corner triangle Experience always best asset trimming out Stunter above sequence adjusting will help get sense what adjustment does Once have adjusted engine leadouts tip weight center gravity can move changing flap-toelevator ratio 135 100 determine like performance airplane Remember time change horn location elevator has corresponding change handle width compensate change control rate evaluation have validity Humbug 666 has demonstrated still room improvement design arena need settle enlarged versions Nobler willing explore new territory has also underscored value building much adjustment possible long weight strength alignment compromised once again adage no substitute cubic dollars Stunt models cubic inches rings true 4The Most Excitement Model Aviation Kit feature month Fling Thing SAIJ Hand launch glider 565-in span 340 in2 14 oz super launches balsa const complete info send us long SASE Send us ad orig receipt box end label receive $2 rebate Expires 4-31-95 Future FlightS 1995TM 1256 Prescott Ave Sunnyvale CA 94089 408735-8260 voice/Fax E-mail KWING@AOLCOMI Losing control can nightmare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience modeling radio repair So avoid inflated repair costs undue service time -- call Radio South fast economical in-house radio service can depend Radio SouthFub K ~jAM13tSie 3702 N Pacerepair information 904 4340909 800-962-7802 Pensacola FL 32505 Toll Free Order Line Orders please HAND LAUNOK RC SALPLANES 15 Sagitta ii span bait balsa heetnd foam wing pip ralsa fasa 7032 airfoil rrea 335 sq 7 oz refom micm PC install Kit LAUNCH BY HI START OR HAND THROW Mini Hi Start easy launches 150 length 30 1/8 00 rubber 120 tom line wood-real convenient ground base system does require hammer set up use Perfect launching 15 M HL sailpianes small areas Kit $2995 plan s-s sit-i Ipree s/h erdnred model kitl 15 M Jouster es span bolt balsacrans stereo & voeo equipment ann mucn sheeted foam wing pip balsa fase 7032 airfoil Quality aluminum body area 3en sq 5 no Two high quality bristle brushes before miom PC install Two interchangeable directional wends Operates sIngle 9 Volt Alkaline battery Inol included lit5$4995 Kits easy construct ana fly use spray A/C adapter loptionall Oneyearwarranly contact cement wing sheeting Complete r CALL TOLL FREE instructions flying tips included Wings have 007MINIVAC built tip wash out easy flying Thermal flying 7664O2 fun relaxing now inexpensive Send obeok money order d Check Money Order F T Bench Aerotech ox 509 Dept Ml Glendale CA 91209 58030 Cyrenus Washington MI 48094 Dealer Inquiries 818-244-6888 Fax 818-244-5858 810-781-7018We accept VISA MC AMEX SAME DAY SHIPMENT HEEDV Antiques Military uiviiian Helicopters Sailolanes worlds largest aircraft documentation 5500 different full color photo studies 19051995 30000 3-view line drawings New 1995 Catalog/Guide 168 pages Only $800 Canada $900 Overseas $1400 Bob Bankas Scale Model Research 3114 Yukon Avenue e Costa Mesa CA 92626 979-WJa May 1995 65
Edition: Model Aviation - 1995/05
Page Numbers: 58, 59, 60, 61, 62, 64, 65
/ U 0 Li reling press pipe oniy way compete 1 Stunt aerodynamics event fully developed last Team Trials demonstrated difference between performance conventional 60-powered airplane 58 Model Aviation 4 the tuned- pipe 40 less scatter between judges several very fine large engines coming scene Superligre 51 Discovery Retro 55 Ukraine Double Star 60 Moldova felt time once again explore aerodynamic avenues improved performance Using conventional engines allows time devoted airplane since engines relatively trouble-free easy adjust through air intake compression changes compared piped engines discussions Bill Netzeband seemed combination Humbug concept characterized midwing configuration coupled very large high-aspect-ratio stabilizer/elevator optimum use flaps could lead interesting result Since effect flaps Humbug could predetermined confidence decided make flapto-elevator ratio adjustable over large range Since associated drag flaps also unpredictable decided build airplane numerous engines could installed minimum cutting airframe dural landing gear used allow easy replacement prop clearance required two-position mounting pattern ensured safe takeoffs grass asphalt surfaces tank compartment made large enough ailow whatever capacities anticipated various candidate engines enough vertical room shimming ensure run characteristics compromised old trick incorporating finite amount play flapHumbug 666 Weight Data Total moments 21293 Component Moment WtArm Total Total weight5825 ounces Wing covered w/pushrod Stab/elevator/horn covered Booms covered Glue assemble above Tail wheel/stooge mount Rudder mechanism Tip wt Paint/fillets fuselage Pushrod/bracesflap elevator Total moments 21302 Landing gear/wheels Eng/prop/spinner/muffler Tank Fuselage w/gear mount Filter/eng bolts/tank shims 1975 350 150 50 25 25 75 350 100 250 1400 200 850 25 366 2030 1250 1400 2275 2300 0 550est 1325 250 1175 700 300 1075 7228 7105 1875 700 569 575 0 1925 1325 625 16450 1400 2550 268 Structural weights Booms Wing Stab/elevator Fuselage Struct wt 100 1600 2 oz extra flaps 250 850 2800 48% total Finish Covering Paint fuselage/fillets Finish wt Projected minimum weight 5625 525 350 875 May 1995 59 Very large control surfaces essential Humbugs author Humbug 666 Model has near-conventional exceptional performance High-aspect-ratio stab appearance unconventional aerodynamics Type CL Stunt Wingspan 53 3/4 inches Engine SuperTigre 51/Discovery Retro 55 Flying Weight 58 ounces Construction Built-up sheet-covered wing Covering/finish Dope 0 OMISS COSSTHUCTION NOTUE WINO MUD BE BJILTIN105000 SlEETMOTTO MOUNTS0118 PLY HELLCOANS MOUNTt-~TWO HALO ES INSTEAD OF ONE PIECE 00 SELECTLEASHES EOOE THAT OPTION 000A SECOND CENTER HEB DHWIOSU PLY SPAHFIBEHALASS ENTESIOU BALSA SHEET-TOPOH PLO FIREWALLOH- OULHIS HELLCHOSE WING CS BALSA SHEET MOTII SIHES IEl/____________ FISELDUE NOTESEE TEOT U PHOTOS EDT DETAILS ___________Ii ELEAD DOT AIIS --L IH BALSA STEET SPAR IS SHEPENOENTLY DOJUSTUW.E-IT2PLT-WINA TIP WEIAIIT MOO ______________________OS BOTTOB OP USA TIP ____________________I 4---UIIii __ T ____OPTIONAL 108 ELY HEAD NGPLANHUN TOPVIEW7 00RHO AINOESNOTE USD0BALSA SOLESFLAP HASTHAILINA tII- rniLITHEICALI SLOCOSOILIOAN LEAD WINS TIPS OUT CARLES IOU BALSA SHEET --END100 BALSA_SHEET IOU SPRUCE CS2PLT CONE RITOPIODY POINT WS BALM SIDES -FOR RARE RARHER CO BALSA USEET ISIHrBALSOCIURAISA WINO -O----~- -. 0HZ ELTOUTSIDE HISCOCESH AMOM CONBIARARLE OPTIONOISCOOEHTSIHESARFACE WOULD BE ST SIMUFFLER LOCATIONIONA PLHTAIIRHEELIN BETWEEN ISEE TEOT EDO DETAIL500 010WA DES IPOWER INFORMATIONOATCD TCH R NHEHNTSNOTE BAILS HATCH ON IAHUEUJRHOz- WING PATTERNS MODEL AVIATION SPECIFICATIONSLOCRALSA SHEET _________ HUMBUG 666 FUSELAGE LENATH FU POP FUSE____________________ WIND SPAS S5000DESISNED BY ROBERT BARON INKED PLAN BY OE DEMARCO RIM ORUA UNO SA IN STABILIZER SPAS OS-TOR REIAST.NO 02 UNOISE NI TO 55 to-elevator connection explored making feature adjustable along flap-to-elevator ratio Humbugs wing area 660 square inches midrange contemporary Stunt airplanes weight 58 ounces also very typical present-day airplanes Consequently performance increases perceived improvements handling ease adjustment can attributed aerodynamics rather unusually low wing loading flaps first placed between booms because structurally natural thing Using portion between booms flaps minimized prospect tip stalling before center wing booms could conceivably add efficiency flaps acting tip plates original engine Fox 40 flap-to-elevator ratio set 66 After few short flights evident power would needed make airplane perform competitively 60%-span flaps moving much less elevator clear drag too much engine wing could induced stall hard cornersAn OS FSR 45 slightly detuned Tom Dixon installed significant increase power over Fox 40 model immediately showed promise performing par fullspan flapped models After trying assortment props l15x5SmadefromaZinger 12x6 appeared provide good balance vertical thrust comfortable lap speeds 50-52-second range time serious testing various flap-to-elevator ratios began 45 easily pulling model around 70-foot lines first increased flap travel provide one-toone flap/elevator ratio corners sharper plane easier fly through maneuvers although level flight still required more-than-average attention Tom Dixon have joked little good too much just about right have since revised too much still insufficient Following premise increased flap travel 135 flap/100 elevator Again corners sharper airplane became still easier fly ratio plane could hammered hard maneuver no sign dropping inducing stall time increased drag showed up potential problem flying outside loop entered 300 elevation using full control maneuver resulted bottom loop still having approximately 10 feet clearance ground Try maneuver piped airplane see safe feels full control flight measured wrapping wire leadouts measuring travel used after wrap pushed leadout guide full control measured approximately 290 flap 220 elevator using full control complete outside loop model would slow visibly just start wobble indicating approaching tip stall point Humbugs handling characteristics very pleasant begged question what would result power installed went SuperTigre 51 coupled plastic spinner lightweight expansion muffler weighed no FSR 45 original metal spinner Adamisin muffler no CC weight change significant increase torque now tap result using same prop no change level-flight speed fullcontrol outside loop resulted clean tight loop no wobble exit now airplane could caused stall wobble regardless control input yet still extremely competitive performance increased torque hence braking action 51 Humbug easier fly since acceleration vertical dive reduced 45 Time duration wingover beginning pullup end pullout mere 302 seconds theoretical time 50-second lap assuming corner radius 15 feet would 269 seconds no loss airspeed 3 second lost due plane slowing through corner climbing vertically demonstrates significant vertical capability provided 51 also apparent efficiency model creating excessive drag developing lift through corner increased torque 51 decided once again try 11 flap-to-elevator ratio since chance would produce tighter corner 1351 ratio Sure enough corner tighter came price noticeably slowing previous ratio increase torque 51 sharp increase drag too much engine wobble likely due tip stall could induced high control inputs now appeared have stumbled onto new way trim maximum performance CL Stunter optimize flap-toelevator ratio past flying just below stall achieved reducing total control travel moving CG forward Both techniques lead reduced performance over provided optimizing flap-to-elevator ratio Much test flying done very light 0-2 mph wind has advantage allowing imbalance trim easily spotted since wind factor flights under conditions clearly demonstrated importance having engine power come off classic Stunt fashion May1995 61 IKON NWST Since 1977 IKON offers largest selection giant scale kits world order kits call 1-800-327-7198 catalog fine kits send $4 00 adjusting compression increase power during two-cycle portion can altered too little compression airplane slows too much begins lose tension too much compression airplane lurches surge power becomes unbalanced leading wobble Flying under marginal conditions emphasized delicate balance between two- four-cycle power having twofour break important smooth execution pattern control system installed minimal play using Delrin bellerank Du-Bro ball-end sockets flap elevator horns Note angle horns flap elevator angle bellcrank pushrod flap horn created bellerank location behind main spar angle elevator pushrod flap elevator horns due midwing configuration leads unequal travel unless controls installed per plans CC 20% mean aerodynamic chord combined large stabilizer indicated Humbug would stableit However level flight still required concentration maintain smoothness began experiment varying amounts controlled play introduced elevator horn removed ball socket sleeved retaining screw socket different sized tubing safetyed arrangement washer screw Varying amounts free play can incorporated control system changing other variable found sufficient play allow trailing edge elevator move 1/ inch total flaps restrained airplane could immediately flown easily level flight wingover apparent model maintaining accurate track testing particularly good day smooth air cloudless blue sky Under conditions could see smoke trail muffler confirmed track wingover extremely straight anticipating dead spot intersection horizontal vertical eights due play controls could detect Putting play elevator-to-flap linkage appears rare instances clear benefit no apparent downside CONSTRUCTION Fabrication Humbug 666 conventional CL Stunt models few building techniques worthy note original model built using conventional open-bay wing construction covered 21st Century cloth Although somewhat easier apply MonoKote 21st Century material contributed little stiffness wing torsion noticeably weaker MonoKote regard addition weight penalty compared MonoKote approximately two ounces Since has established stiffer airframes perform much better windy weather construction changed sheet-covered wing dope finish weight penalty secondgeneration airplane weight additional planking solid-sheet flaps shown drawing save about two ounces over complex built-up sheet flaps followed airfoil original hinging prototype done ends flap stiffness required precluded lightening original flaps cutting out sectionsAvailable data seems indicate no aerodynamic benefit having flaps continuation airfoil compared simpler flat flap used majority Stunt models faired-in flap looked good plans lost its appeal once actual building took place recommend wing tail built finished exclusive color separately fuselage Knowing weights wing tail well fixed hardware possible determine nose length summing moments individual components such center gravity located per theplans no ballast required nose length shown plans reflects best estimates based original model should very close optimum nose length will depend component weights engine selection finish weight spinner etc plan shows Discovery Retro 55 engine soon imported Ukraine distributed Tom Dixon engine has front intake rear exhaust sold very lightweight muffler powerbased direct comparison tests run 12 x 6 Zingeris SuperTigre 51 weight same An engine similar motor Discovery Retrothe Vorohive stunt engine Moscowis also expected imported later year SuperTigre 51 however has demonstrated work very well design readily available muffler being midfuselage instead outside eliminates eccentric weight drag side-exhaust engine would suggest increasing engine size 60 because weight penalty engine fuel tank structure fuel building fuselage make crutch consisting two engine bearers glued cross-grained 1/2-inch spacer glue joint should made very flat surface such piece glass hard table Mount two aluminum rails engine bearers small screws have countersunk blow surface aluminum rails prevent local crushing 62 Model Aviation R ACE 1/4 SCALE 80 WACO UPF-7 1/5 SCALE 73 MONOCOUPE D-145 1/4 SCALE 96 F R N ED EI MLITY iNTEGRITY SERVICE QtLALrTY UTEGUTV SERVICE QJJAL TTY INTEGRITY SERVICE 5O S 0AFTEDT 395O-AVaUetBlvd WALNUCA91789N ci U ci WA T PE RR 0 0 F CALL OR WRITE FOR FREE U HOT BOX FLIGHT SUPPORT FAX 315 5484099 Send Dollar Cede loq dealer first en Residents add 7% BROCHURE Li no 0 no J0 5 Li no 70 no engine bearer engine tightened down Make aluminum rails flat parallel sanding crutch assembly sandpaper laying hard flat surface crutch assembly incorporated fuselage assured engine casing will distorted slight misalignments rest fuselage Assembly fuselage sides together crutch plywood bulkhead just forward wing best done fuselage upside down flat surface using slow-curing epoxy entire fuselage built top block bottom sheet tack-glued place shaping sanding completed prior installation wing top block removed hollowed wall thickness cowl details should also completed time Installation booms stabilizer pushrod assembly wing done prior fuselage installation nature booms pretty much assures accurate alignment stabilizer incidence provided booms cut accurately However always good idea check stabilizer Robart incidence meter misalignment will result poor handling characteristics fuselage now glued wing/tail assembly taking care make cutout fuselage stabilizer good fit Again use slow-curing epoxy provide time accurately align fuselage Once confirmed controls operate smoothly gear mount bottom block top block can installed Note pushrod flap elevator made composite stiffness adjustable feature control system does allow pushrod braces used fuselage install top block slow-curing epoxy using masking tape position block until glue dries slow-curing epoxy provides superior bond allows ample time accurately position components reason use critical operations alignment takes precedence over speed assembly Trimming flying similar other Stunter Determine engine running reliably provides lap times 50-52 seconds 70 feet line best prop pitch between 5/4 51/3 inches using Prather pitch gauge very important sand blades pitch props off pitch least /2 inch Rev-Up blades tend /2-1 inch low Zingers tend fairly close constant blade stations No commercial props provide exact pitches required best performance given design flier should become comfortable altering pitch commercial props suit particular airplane initial center gravity should very close shown plans 64 Model Aviation e Off Knees I4th 3001b Seat Capacity nded Scale VOlbnetera Monitor RX& 7X Charge 4-Automatic Glow Plug Driver Top Quality Power Panel ted Fuseci Master Panel Control Switches NIcad Glow Battery Charger 12v Starter Outlet t 12V Glow Fuel Pump Fuel/Drain Switch 5- COMPARIMENT LIFT PliopA SroIlAOEThAY #Hoids 2 12V4amp Gell Cell Batteries Sure Starts #Automatioally Monitors Charge Status 12v Battery #Enough Storage Carry/Store 4 Transmitters #NEW- FUEL PLATFO0V 32oz FUEL BOTTLE FUEL LINE Wq NdIIWraVRCCUtEd TOLL FREE 1-500-468-2692 Mar West Mfg & Diet Co Inc 3339 Fitzgerald Rd Suite Rancho Cordova CA 95742 TEL 916 961-4 703 FAX 916983-1923 DARNED GOOD AIRMEN Lightest pitets eOa ass Seeds Bust Pilot KitMode USA #1081/8scale.$695 #1061/6scale795 #1051/5scale895 #1041/4scale995 #1031/3 scale.1595 #308-1/8 jet695 #307-1/7 jet795 Full Body Pilot Kit #20o6s ae$995 #2055s ae095 #2044sae95 #2033sae95 V wing high level flight low inverted flight likely wing warped rigid construction allsheet wing requires time-honored tradition tweaking flaps level wings sure however elevators parallel another since large empennage design sufficiently powerful roll airplane Set original control elevator horn such flaps move 135 elevator moving 100 wings level engine rnnning well begin flying various hard-corner maneuvers such inside square level flight speed close 50 seconds per lap engine lacks power maneuvers reduce head clearance 005 inch increments engine tends come too hard maneuvers runs too slowly level flight may overcompressed requiring additional head shims flights conducted 10% nitro 24% lubricant Taffinder PA fuel Provided airspeed gives lap times low-five-second range wings level leadout position can adjusted use leadout position counteract precession well trim model maneuvering independent leadout adjustment line permits Generally leadouts too far forward will loss tension above 450 leadouts too far back line tension will excessive level flight will drop off significantly maneuvers due excessive yawTip weight can also adjusted time first indication tip weight insufficient outside wing will up both upright inverted Also insufficient tip weight will lead loss tension above 450 Too much tip weight will cause violent wobble first last corner triangle Experience always best asset trimming out Stunter above sequence adjusting will help get sense what adjustment does Once have adjusted engine leadouts tip weight center gravity can move changing flap-toelevator ratio 135 100 determine like performance airplane Remember time change horn location elevator has corresponding change handle width compensate change control rate evaluation have validity Humbug 666 has demonstrated still room improvement design arena need settle enlarged versions Nobler willing explore new territory has also underscored value building much adjustment possible long weight strength alignment compromised once again adage no substitute cubic dollars Stunt models cubic inches rings true 4The Most Excitement Model Aviation Kit feature month Fling Thing SAIJ Hand launch glider 565-in span 340 in2 14 oz super launches balsa const complete info send us long SASE Send us ad orig receipt box end label receive $2 rebate Expires 4-31-95 Future FlightS 1995TM 1256 Prescott Ave Sunnyvale CA 94089 408735-8260 voice/Fax E-mail KWING@AOLCOMI Losing control can nightmare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience modeling radio repair So avoid inflated repair costs undue service time -- call Radio South fast economical in-house radio service can depend Radio SouthFub K ~jAM13tSie 3702 N Pacerepair information 904 4340909 800-962-7802 Pensacola FL 32505 Toll Free Order Line Orders please HAND LAUNOK RC SALPLANES 15 Sagitta ii span bait balsa heetnd foam wing pip ralsa fasa 7032 airfoil rrea 335 sq 7 oz refom micm PC install Kit LAUNCH BY HI START OR HAND THROW Mini Hi Start easy launches 150 length 30 1/8 00 rubber 120 tom line wood-real convenient ground base system does require hammer set up use Perfect launching 15 M HL sailpianes small areas Kit $2995 plan s-s sit-i Ipree s/h erdnred model kitl 15 M Jouster es span bolt balsacrans stereo & voeo equipment ann mucn sheeted foam wing pip balsa fase 7032 airfoil Quality aluminum body area 3en sq 5 no Two high quality bristle brushes before miom PC install Two interchangeable directional wends Operates sIngle 9 Volt Alkaline battery Inol included lit5$4995 Kits easy construct ana fly use spray A/C adapter loptionall Oneyearwarranly contact cement wing sheeting Complete r CALL TOLL FREE instructions flying tips included Wings have 007MINIVAC built tip wash out easy flying Thermal flying 7664O2 fun relaxing now inexpensive Send obeok money order d Check Money Order F T Bench Aerotech ox 509 Dept Ml Glendale CA 91209 58030 Cyrenus Washington MI 48094 Dealer Inquiries 818-244-6888 Fax 818-244-5858 810-781-7018We accept VISA MC AMEX SAME DAY SHIPMENT HEEDV Antiques Military uiviiian Helicopters Sailolanes worlds largest aircraft documentation 5500 different full color photo studies 19051995 30000 3-view line drawings New 1995 Catalog/Guide 168 pages Only $800 Canada $900 Overseas $1400 Bob Bankas Scale Model Research 3114 Yukon Avenue e Costa Mesa CA 92626 979-WJa May 1995 65
Edition: Model Aviation - 1995/05
Page Numbers: 58, 59, 60, 61, 62, 64, 65
/ U 0 Li reling press pipe oniy way compete 1 Stunt aerodynamics event fully developed last Team Trials demonstrated difference between performance conventional 60-powered airplane 58 Model Aviation 4 the tuned- pipe 40 less scatter between judges several very fine large engines coming scene Superligre 51 Discovery Retro 55 Ukraine Double Star 60 Moldova felt time once again explore aerodynamic avenues improved performance Using conventional engines allows time devoted airplane since engines relatively trouble-free easy adjust through air intake compression changes compared piped engines discussions Bill Netzeband seemed combination Humbug concept characterized midwing configuration coupled very large high-aspect-ratio stabilizer/elevator optimum use flaps could lead interesting result Since effect flaps Humbug could predetermined confidence decided make flapto-elevator ratio adjustable over large range Since associated drag flaps also unpredictable decided build airplane numerous engines could installed minimum cutting airframe dural landing gear used allow easy replacement prop clearance required two-position mounting pattern ensured safe takeoffs grass asphalt surfaces tank compartment made large enough ailow whatever capacities anticipated various candidate engines enough vertical room shimming ensure run characteristics compromised old trick incorporating finite amount play flapHumbug 666 Weight Data Total moments 21293 Component Moment WtArm Total Total weight5825 ounces Wing covered w/pushrod Stab/elevator/horn covered Booms covered Glue assemble above Tail wheel/stooge mount Rudder mechanism Tip wt Paint/fillets fuselage Pushrod/bracesflap elevator Total moments 21302 Landing gear/wheels Eng/prop/spinner/muffler Tank Fuselage w/gear mount Filter/eng bolts/tank shims 1975 350 150 50 25 25 75 350 100 250 1400 200 850 25 366 2030 1250 1400 2275 2300 0 550est 1325 250 1175 700 300 1075 7228 7105 1875 700 569 575 0 1925 1325 625 16450 1400 2550 268 Structural weights Booms Wing Stab/elevator Fuselage Struct wt 100 1600 2 oz extra flaps 250 850 2800 48% total Finish Covering Paint fuselage/fillets Finish wt Projected minimum weight 5625 525 350 875 May 1995 59 Very large control surfaces essential Humbugs author Humbug 666 Model has near-conventional exceptional performance High-aspect-ratio stab appearance unconventional aerodynamics Type CL Stunt Wingspan 53 3/4 inches Engine SuperTigre 51/Discovery Retro 55 Flying Weight 58 ounces Construction Built-up sheet-covered wing Covering/finish Dope 0 OMISS COSSTHUCTION NOTUE WINO MUD BE BJILTIN105000 SlEETMOTTO MOUNTS0118 PLY HELLCOANS MOUNTt-~TWO HALO ES INSTEAD OF ONE PIECE 00 SELECTLEASHES EOOE THAT OPTION 000A SECOND CENTER HEB DHWIOSU PLY SPAHFIBEHALASS ENTESIOU BALSA SHEET-TOPOH PLO FIREWALLOH- OULHIS HELLCHOSE WING CS BALSA SHEET MOTII SIHES IEl/____________ FISELDUE NOTESEE TEOT U PHOTOS EDT DETAILS ___________Ii ELEAD DOT AIIS --L IH BALSA STEET SPAR IS SHEPENOENTLY DOJUSTUW.E-IT2PLT-WINA TIP WEIAIIT MOO ______________________OS BOTTOB OP USA TIP ____________________I 4---UIIii __ T ____OPTIONAL 108 ELY HEAD NGPLANHUN TOPVIEW7 00RHO AINOESNOTE USD0BALSA SOLESFLAP HASTHAILINA tII- rniLITHEICALI SLOCOSOILIOAN LEAD WINS TIPS OUT CARLES IOU BALSA SHEET --END100 BALSA_SHEET IOU SPRUCE CS2PLT CONE RITOPIODY POINT WS BALM SIDES -FOR RARE RARHER CO BALSA USEET ISIHrBALSOCIURAISA WINO -O----~- -. 0HZ ELTOUTSIDE HISCOCESH AMOM CONBIARARLE OPTIONOISCOOEHTSIHESARFACE WOULD BE ST SIMUFFLER LOCATIONIONA PLHTAIIRHEELIN BETWEEN ISEE TEOT EDO DETAIL500 010WA DES IPOWER INFORMATIONOATCD TCH R NHEHNTSNOTE BAILS HATCH ON IAHUEUJRHOz- WING PATTERNS MODEL AVIATION SPECIFICATIONSLOCRALSA SHEET _________ HUMBUG 666 FUSELAGE LENATH FU POP FUSE____________________ WIND SPAS S5000DESISNED BY ROBERT BARON INKED PLAN BY OE DEMARCO RIM ORUA UNO SA IN STABILIZER SPAS OS-TOR REIAST.NO 02 UNOISE NI TO 55 to-elevator connection explored making feature adjustable along flap-to-elevator ratio Humbugs wing area 660 square inches midrange contemporary Stunt airplanes weight 58 ounces also very typical present-day airplanes Consequently performance increases perceived improvements handling ease adjustment can attributed aerodynamics rather unusually low wing loading flaps first placed between booms because structurally natural thing Using portion between booms flaps minimized prospect tip stalling before center wing booms could conceivably add efficiency flaps acting tip plates original engine Fox 40 flap-to-elevator ratio set 66 After few short flights evident power would needed make airplane perform competitively 60%-span flaps moving much less elevator clear drag too much engine wing could induced stall hard cornersAn OS FSR 45 slightly detuned Tom Dixon installed significant increase power over Fox 40 model immediately showed promise performing par fullspan flapped models After trying assortment props l15x5SmadefromaZinger 12x6 appeared provide good balance vertical thrust comfortable lap speeds 50-52-second range time serious testing various flap-to-elevator ratios began 45 easily pulling model around 70-foot lines first increased flap travel provide one-toone flap/elevator ratio corners sharper plane easier fly through maneuvers although level flight still required more-than-average attention Tom Dixon have joked little good too much just about right have since revised too much still insufficient Following premise increased flap travel 135 flap/100 elevator Again corners sharper airplane became still easier fly ratio plane could hammered hard maneuver no sign dropping inducing stall time increased drag showed up potential problem flying outside loop entered 300 elevation using full control maneuver resulted bottom loop still having approximately 10 feet clearance ground Try maneuver piped airplane see safe feels full control flight measured wrapping wire leadouts measuring travel used after wrap pushed leadout guide full control measured approximately 290 flap 220 elevator using full control complete outside loop model would slow visibly just start wobble indicating approaching tip stall point Humbugs handling characteristics very pleasant begged question what would result power installed went SuperTigre 51 coupled plastic spinner lightweight expansion muffler weighed no FSR 45 original metal spinner Adamisin muffler no CC weight change significant increase torque now tap result using same prop no change level-flight speed fullcontrol outside loop resulted clean tight loop no wobble exit now airplane could caused stall wobble regardless control input yet still extremely competitive performance increased torque hence braking action 51 Humbug easier fly since acceleration vertical dive reduced 45 Time duration wingover beginning pullup end pullout mere 302 seconds theoretical time 50-second lap assuming corner radius 15 feet would 269 seconds no loss airspeed 3 second lost due plane slowing through corner climbing vertically demonstrates significant vertical capability provided 51 also apparent efficiency model creating excessive drag developing lift through corner increased torque 51 decided once again try 11 flap-to-elevator ratio since chance would produce tighter corner 1351 ratio Sure enough corner tighter came price noticeably slowing previous ratio increase torque 51 sharp increase drag too much engine wobble likely due tip stall could induced high control inputs now appeared have stumbled onto new way trim maximum performance CL Stunter optimize flap-toelevator ratio past flying just below stall achieved reducing total control travel moving CG forward Both techniques lead reduced performance over provided optimizing flap-to-elevator ratio Much test flying done very light 0-2 mph wind has advantage allowing imbalance trim easily spotted since wind factor flights under conditions clearly demonstrated importance having engine power come off classic Stunt fashion May1995 61 IKON NWST Since 1977 IKON offers largest selection giant scale kits world order kits call 1-800-327-7198 catalog fine kits send $4 00 adjusting compression increase power during two-cycle portion can altered too little compression airplane slows too much begins lose tension too much compression airplane lurches surge power becomes unbalanced leading wobble Flying under marginal conditions emphasized delicate balance between two- four-cycle power having twofour break important smooth execution pattern control system installed minimal play using Delrin bellerank Du-Bro ball-end sockets flap elevator horns Note angle horns flap elevator angle bellcrank pushrod flap horn created bellerank location behind main spar angle elevator pushrod flap elevator horns due midwing configuration leads unequal travel unless controls installed per plans CC 20% mean aerodynamic chord combined large stabilizer indicated Humbug would stableit However level flight still required concentration maintain smoothness began experiment varying amounts controlled play introduced elevator horn removed ball socket sleeved retaining screw socket different sized tubing safetyed arrangement washer screw Varying amounts free play can incorporated control system changing other variable found sufficient play allow trailing edge elevator move 1/ inch total flaps restrained airplane could immediately flown easily level flight wingover apparent model maintaining accurate track testing particularly good day smooth air cloudless blue sky Under conditions could see smoke trail muffler confirmed track wingover extremely straight anticipating dead spot intersection horizontal vertical eights due play controls could detect Putting play elevator-to-flap linkage appears rare instances clear benefit no apparent downside CONSTRUCTION Fabrication Humbug 666 conventional CL Stunt models few building techniques worthy note original model built using conventional open-bay wing construction covered 21st Century cloth Although somewhat easier apply MonoKote 21st Century material contributed little stiffness wing torsion noticeably weaker MonoKote regard addition weight penalty compared MonoKote approximately two ounces Since has established stiffer airframes perform much better windy weather construction changed sheet-covered wing dope finish weight penalty secondgeneration airplane weight additional planking solid-sheet flaps shown drawing save about two ounces over complex built-up sheet flaps followed airfoil original hinging prototype done ends flap stiffness required precluded lightening original flaps cutting out sectionsAvailable data seems indicate no aerodynamic benefit having flaps continuation airfoil compared simpler flat flap used majority Stunt models faired-in flap looked good plans lost its appeal once actual building took place recommend wing tail built finished exclusive color separately fuselage Knowing weights wing tail well fixed hardware possible determine nose length summing moments individual components such center gravity located per theplans no ballast required nose length shown plans reflects best estimates based original model should very close optimum nose length will depend component weights engine selection finish weight spinner etc plan shows Discovery Retro 55 engine soon imported Ukraine distributed Tom Dixon engine has front intake rear exhaust sold very lightweight muffler powerbased direct comparison tests run 12 x 6 Zingeris SuperTigre 51 weight same An engine similar motor Discovery Retrothe Vorohive stunt engine Moscowis also expected imported later year SuperTigre 51 however has demonstrated work very well design readily available muffler being midfuselage instead outside eliminates eccentric weight drag side-exhaust engine would suggest increasing engine size 60 because weight penalty engine fuel tank structure fuel building fuselage make crutch consisting two engine bearers glued cross-grained 1/2-inch spacer glue joint should made very flat surface such piece glass hard table Mount two aluminum rails engine bearers small screws have countersunk blow surface aluminum rails prevent local crushing 62 Model Aviation R ACE 1/4 SCALE 80 WACO UPF-7 1/5 SCALE 73 MONOCOUPE D-145 1/4 SCALE 96 F R N ED EI MLITY iNTEGRITY SERVICE QtLALrTY UTEGUTV SERVICE QJJAL TTY INTEGRITY SERVICE 5O S 0AFTEDT 395O-AVaUetBlvd WALNUCA91789N ci U ci WA T PE RR 0 0 F CALL OR WRITE FOR FREE U HOT BOX FLIGHT SUPPORT FAX 315 5484099 Send Dollar Cede loq dealer first en Residents add 7% BROCHURE Li no 0 no J0 5 Li no 70 no engine bearer engine tightened down Make aluminum rails flat parallel sanding crutch assembly sandpaper laying hard flat surface crutch assembly incorporated fuselage assured engine casing will distorted slight misalignments rest fuselage Assembly fuselage sides together crutch plywood bulkhead just forward wing best done fuselage upside down flat surface using slow-curing epoxy entire fuselage built top block bottom sheet tack-glued place shaping sanding completed prior installation wing top block removed hollowed wall thickness cowl details should also completed time Installation booms stabilizer pushrod assembly wing done prior fuselage installation nature booms pretty much assures accurate alignment stabilizer incidence provided booms cut accurately However always good idea check stabilizer Robart incidence meter misalignment will result poor handling characteristics fuselage now glued wing/tail assembly taking care make cutout fuselage stabilizer good fit Again use slow-curing epoxy provide time accurately align fuselage Once confirmed controls operate smoothly gear mount bottom block top block can installed Note pushrod flap elevator made composite stiffness adjustable feature control system does allow pushrod braces used fuselage install top block slow-curing epoxy using masking tape position block until glue dries slow-curing epoxy provides superior bond allows ample time accurately position components reason use critical operations alignment takes precedence over speed assembly Trimming flying similar other Stunter Determine engine running reliably provides lap times 50-52 seconds 70 feet line best prop pitch between 5/4 51/3 inches using Prather pitch gauge very important sand blades pitch props off pitch least /2 inch Rev-Up blades tend /2-1 inch low Zingers tend fairly close constant blade stations No commercial props provide exact pitches required best performance given design flier should become comfortable altering pitch commercial props suit particular airplane initial center gravity should very close shown plans 64 Model Aviation e Off Knees I4th 3001b Seat Capacity nded Scale VOlbnetera Monitor RX& 7X Charge 4-Automatic Glow Plug Driver Top Quality Power Panel ted Fuseci Master Panel Control Switches NIcad Glow Battery Charger 12v Starter Outlet t 12V Glow Fuel Pump Fuel/Drain Switch 5- COMPARIMENT LIFT PliopA SroIlAOEThAY #Hoids 2 12V4amp Gell Cell Batteries Sure Starts #Automatioally Monitors Charge Status 12v Battery #Enough Storage Carry/Store 4 Transmitters #NEW- FUEL PLATFO0V 32oz FUEL BOTTLE FUEL LINE Wq NdIIWraVRCCUtEd TOLL FREE 1-500-468-2692 Mar West Mfg & Diet Co Inc 3339 Fitzgerald Rd Suite Rancho Cordova CA 95742 TEL 916 961-4 703 FAX 916983-1923 DARNED GOOD AIRMEN Lightest pitets eOa ass Seeds Bust Pilot KitMode USA #1081/8scale.$695 #1061/6scale795 #1051/5scale895 #1041/4scale995 #1031/3 scale.1595 #308-1/8 jet695 #307-1/7 jet795 Full Body Pilot Kit #20o6s ae$995 #2055s ae095 #2044sae95 #2033sae95 V wing high level flight low inverted flight likely wing warped rigid construction allsheet wing requires time-honored tradition tweaking flaps level wings sure however elevators parallel another since large empennage design sufficiently powerful roll airplane Set original control elevator horn such flaps move 135 elevator moving 100 wings level engine rnnning well begin flying various hard-corner maneuvers such inside square level flight speed close 50 seconds per lap engine lacks power maneuvers reduce head clearance 005 inch increments engine tends come too hard maneuvers runs too slowly level flight may overcompressed requiring additional head shims flights conducted 10% nitro 24% lubricant Taffinder PA fuel Provided airspeed gives lap times low-five-second range wings level leadout position can adjusted use leadout position counteract precession well trim model maneuvering independent leadout adjustment line permits Generally leadouts too far forward will loss tension above 450 leadouts too far back line tension will excessive level flight will drop off significantly maneuvers due excessive yawTip weight can also adjusted time first indication tip weight insufficient outside wing will up both upright inverted Also insufficient tip weight will lead loss tension above 450 Too much tip weight will cause violent wobble first last corner triangle Experience always best asset trimming out Stunter above sequence adjusting will help get sense what adjustment does Once have adjusted engine leadouts tip weight center gravity can move changing flap-toelevator ratio 135 100 determine like performance airplane Remember time change horn location elevator has corresponding change handle width compensate change control rate evaluation have validity Humbug 666 has demonstrated still room improvement design arena need settle enlarged versions Nobler willing explore new territory has also underscored value building much adjustment possible long weight strength alignment compromised once again adage no substitute cubic dollars Stunt models cubic inches rings true 4The Most Excitement Model Aviation Kit feature month Fling Thing SAIJ Hand launch glider 565-in span 340 in2 14 oz super launches balsa const complete info send us long SASE Send us ad orig receipt box end label receive $2 rebate Expires 4-31-95 Future FlightS 1995TM 1256 Prescott Ave Sunnyvale CA 94089 408735-8260 voice/Fax E-mail KWING@AOLCOMI Losing control can nightmare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience modeling radio repair So avoid inflated repair costs undue service time -- call Radio South fast economical in-house radio service can depend Radio SouthFub K ~jAM13tSie 3702 N Pacerepair information 904 4340909 800-962-7802 Pensacola FL 32505 Toll Free Order Line Orders please HAND LAUNOK RC SALPLANES 15 Sagitta ii span bait balsa heetnd foam wing pip ralsa fasa 7032 airfoil rrea 335 sq 7 oz refom micm PC install Kit LAUNCH BY HI START OR HAND THROW Mini Hi Start easy launches 150 length 30 1/8 00 rubber 120 tom line wood-real convenient ground base system does require hammer set up use Perfect launching 15 M HL sailpianes small areas Kit $2995 plan s-s sit-i Ipree s/h erdnred model kitl 15 M Jouster es span bolt balsacrans stereo & voeo equipment ann mucn sheeted foam wing pip balsa fase 7032 airfoil Quality aluminum body area 3en sq 5 no Two high quality bristle brushes before miom PC install Two interchangeable directional wends Operates sIngle 9 Volt Alkaline battery Inol included lit5$4995 Kits easy construct ana fly use spray A/C adapter loptionall Oneyearwarranly contact cement wing sheeting Complete r CALL TOLL FREE instructions flying tips included Wings have 007MINIVAC built tip wash out easy flying Thermal flying 7664O2 fun relaxing now inexpensive Send obeok money order d Check Money Order F T Bench Aerotech ox 509 Dept Ml Glendale CA 91209 58030 Cyrenus Washington MI 48094 Dealer Inquiries 818-244-6888 Fax 818-244-5858 810-781-7018We accept VISA MC AMEX SAME DAY SHIPMENT HEEDV Antiques Military uiviiian Helicopters Sailolanes worlds largest aircraft documentation 5500 different full color photo studies 19051995 30000 3-view line drawings New 1995 Catalog/Guide 168 pages Only $800 Canada $900 Overseas $1400 Bob Bankas Scale Model Research 3114 Yukon Avenue e Costa Mesa CA 92626 979-WJa May 1995 65
Edition: Model Aviation - 1995/05
Page Numbers: 58, 59, 60, 61, 62, 64, 65
/ U 0 Li reling press pipe oniy way compete 1 Stunt aerodynamics event fully developed last Team Trials demonstrated difference between performance conventional 60-powered airplane 58 Model Aviation 4 the tuned- pipe 40 less scatter between judges several very fine large engines coming scene Superligre 51 Discovery Retro 55 Ukraine Double Star 60 Moldova felt time once again explore aerodynamic avenues improved performance Using conventional engines allows time devoted airplane since engines relatively trouble-free easy adjust through air intake compression changes compared piped engines discussions Bill Netzeband seemed combination Humbug concept characterized midwing configuration coupled very large high-aspect-ratio stabilizer/elevator optimum use flaps could lead interesting result Since effect flaps Humbug could predetermined confidence decided make flapto-elevator ratio adjustable over large range Since associated drag flaps also unpredictable decided build airplane numerous engines could installed minimum cutting airframe dural landing gear used allow easy replacement prop clearance required two-position mounting pattern ensured safe takeoffs grass asphalt surfaces tank compartment made large enough ailow whatever capacities anticipated various candidate engines enough vertical room shimming ensure run characteristics compromised old trick incorporating finite amount play flapHumbug 666 Weight Data Total moments 21293 Component Moment WtArm Total Total weight5825 ounces Wing covered w/pushrod Stab/elevator/horn covered Booms covered Glue assemble above Tail wheel/stooge mount Rudder mechanism Tip wt Paint/fillets fuselage Pushrod/bracesflap elevator Total moments 21302 Landing gear/wheels Eng/prop/spinner/muffler Tank Fuselage w/gear mount Filter/eng bolts/tank shims 1975 350 150 50 25 25 75 350 100 250 1400 200 850 25 366 2030 1250 1400 2275 2300 0 550est 1325 250 1175 700 300 1075 7228 7105 1875 700 569 575 0 1925 1325 625 16450 1400 2550 268 Structural weights Booms Wing Stab/elevator Fuselage Struct wt 100 1600 2 oz extra flaps 250 850 2800 48% total Finish Covering Paint fuselage/fillets Finish wt Projected minimum weight 5625 525 350 875 May 1995 59 Very large control surfaces essential Humbugs author Humbug 666 Model has near-conventional exceptional performance High-aspect-ratio stab appearance unconventional aerodynamics Type CL Stunt Wingspan 53 3/4 inches Engine SuperTigre 51/Discovery Retro 55 Flying Weight 58 ounces Construction Built-up sheet-covered wing Covering/finish Dope 0 OMISS COSSTHUCTION NOTUE WINO MUD BE BJILTIN105000 SlEETMOTTO MOUNTS0118 PLY HELLCOANS MOUNTt-~TWO HALO ES INSTEAD OF ONE PIECE 00 SELECTLEASHES EOOE THAT OPTION 000A SECOND CENTER HEB DHWIOSU PLY SPAHFIBEHALASS ENTESIOU BALSA SHEET-TOPOH PLO FIREWALLOH- OULHIS HELLCHOSE WING CS BALSA SHEET MOTII SIHES IEl/____________ FISELDUE NOTESEE TEOT U PHOTOS EDT DETAILS ___________Ii ELEAD DOT AIIS --L IH BALSA STEET SPAR IS SHEPENOENTLY DOJUSTUW.E-IT2PLT-WINA TIP WEIAIIT MOO ______________________OS BOTTOB OP USA TIP ____________________I 4---UIIii __ T ____OPTIONAL 108 ELY HEAD NGPLANHUN TOPVIEW7 00RHO AINOESNOTE USD0BALSA SOLESFLAP HASTHAILINA tII- rniLITHEICALI SLOCOSOILIOAN LEAD WINS TIPS OUT CARLES IOU BALSA SHEET --END100 BALSA_SHEET IOU SPRUCE CS2PLT CONE RITOPIODY POINT WS BALM SIDES -FOR RARE RARHER CO BALSA USEET ISIHrBALSOCIURAISA WINO -O----~- -. 0HZ ELTOUTSIDE HISCOCESH AMOM CONBIARARLE OPTIONOISCOOEHTSIHESARFACE WOULD BE ST SIMUFFLER LOCATIONIONA PLHTAIIRHEELIN BETWEEN ISEE TEOT EDO DETAIL500 010WA DES IPOWER INFORMATIONOATCD TCH R NHEHNTSNOTE BAILS HATCH ON IAHUEUJRHOz- WING PATTERNS MODEL AVIATION SPECIFICATIONSLOCRALSA SHEET _________ HUMBUG 666 FUSELAGE LENATH FU POP FUSE____________________ WIND SPAS S5000DESISNED BY ROBERT BARON INKED PLAN BY OE DEMARCO RIM ORUA UNO SA IN STABILIZER SPAS OS-TOR REIAST.NO 02 UNOISE NI TO 55 to-elevator connection explored making feature adjustable along flap-to-elevator ratio Humbugs wing area 660 square inches midrange contemporary Stunt airplanes weight 58 ounces also very typical present-day airplanes Consequently performance increases perceived improvements handling ease adjustment can attributed aerodynamics rather unusually low wing loading flaps first placed between booms because structurally natural thing Using portion between booms flaps minimized prospect tip stalling before center wing booms could conceivably add efficiency flaps acting tip plates original engine Fox 40 flap-to-elevator ratio set 66 After few short flights evident power would needed make airplane perform competitively 60%-span flaps moving much less elevator clear drag too much engine wing could induced stall hard cornersAn OS FSR 45 slightly detuned Tom Dixon installed significant increase power over Fox 40 model immediately showed promise performing par fullspan flapped models After trying assortment props l15x5SmadefromaZinger 12x6 appeared provide good balance vertical thrust comfortable lap speeds 50-52-second range time serious testing various flap-to-elevator ratios began 45 easily pulling model around 70-foot lines first increased flap travel provide one-toone flap/elevator ratio corners sharper plane easier fly through maneuvers although level flight still required more-than-average attention Tom Dixon have joked little good too much just about right have since revised too much still insufficient Following premise increased flap travel 135 flap/100 elevator Again corners sharper airplane became still easier fly ratio plane could hammered hard maneuver no sign dropping inducing stall time increased drag showed up potential problem flying outside loop entered 300 elevation using full control maneuver resulted bottom loop still having approximately 10 feet clearance ground Try maneuver piped airplane see safe feels full control flight measured wrapping wire leadouts measuring travel used after wrap pushed leadout guide full control measured approximately 290 flap 220 elevator using full control complete outside loop model would slow visibly just start wobble indicating approaching tip stall point Humbugs handling characteristics very pleasant begged question what would result power installed went SuperTigre 51 coupled plastic spinner lightweight expansion muffler weighed no FSR 45 original metal spinner Adamisin muffler no CC weight change significant increase torque now tap result using same prop no change level-flight speed fullcontrol outside loop resulted clean tight loop no wobble exit now airplane could caused stall wobble regardless control input yet still extremely competitive performance increased torque hence braking action 51 Humbug easier fly since acceleration vertical dive reduced 45 Time duration wingover beginning pullup end pullout mere 302 seconds theoretical time 50-second lap assuming corner radius 15 feet would 269 seconds no loss airspeed 3 second lost due plane slowing through corner climbing vertically demonstrates significant vertical capability provided 51 also apparent efficiency model creating excessive drag developing lift through corner increased torque 51 decided once again try 11 flap-to-elevator ratio since chance would produce tighter corner 1351 ratio Sure enough corner tighter came price noticeably slowing previous ratio increase torque 51 sharp increase drag too much engine wobble likely due tip stall could induced high control inputs now appeared have stumbled onto new way trim maximum performance CL Stunter optimize flap-toelevator ratio past flying just below stall achieved reducing total control travel moving CG forward Both techniques lead reduced performance over provided optimizing flap-to-elevator ratio Much test flying done very light 0-2 mph wind has advantage allowing imbalance trim easily spotted since wind factor flights under conditions clearly demonstrated importance having engine power come off classic Stunt fashion May1995 61 IKON NWST Since 1977 IKON offers largest selection giant scale kits world order kits call 1-800-327-7198 catalog fine kits send $4 00 adjusting compression increase power during two-cycle portion can altered too little compression airplane slows too much begins lose tension too much compression airplane lurches surge power becomes unbalanced leading wobble Flying under marginal conditions emphasized delicate balance between two- four-cycle power having twofour break important smooth execution pattern control system installed minimal play using Delrin bellerank Du-Bro ball-end sockets flap elevator horns Note angle horns flap elevator angle bellcrank pushrod flap horn created bellerank location behind main spar angle elevator pushrod flap elevator horns due midwing configuration leads unequal travel unless controls installed per plans CC 20% mean aerodynamic chord combined large stabilizer indicated Humbug would stableit However level flight still required concentration maintain smoothness began experiment varying amounts controlled play introduced elevator horn removed ball socket sleeved retaining screw socket different sized tubing safetyed arrangement washer screw Varying amounts free play can incorporated control system changing other variable found sufficient play allow trailing edge elevator move 1/ inch total flaps restrained airplane could immediately flown easily level flight wingover apparent model maintaining accurate track testing particularly good day smooth air cloudless blue sky Under conditions could see smoke trail muffler confirmed track wingover extremely straight anticipating dead spot intersection horizontal vertical eights due play controls could detect Putting play elevator-to-flap linkage appears rare instances clear benefit no apparent downside CONSTRUCTION Fabrication Humbug 666 conventional CL Stunt models few building techniques worthy note original model built using conventional open-bay wing construction covered 21st Century cloth Although somewhat easier apply MonoKote 21st Century material contributed little stiffness wing torsion noticeably weaker MonoKote regard addition weight penalty compared MonoKote approximately two ounces Since has established stiffer airframes perform much better windy weather construction changed sheet-covered wing dope finish weight penalty secondgeneration airplane weight additional planking solid-sheet flaps shown drawing save about two ounces over complex built-up sheet flaps followed airfoil original hinging prototype done ends flap stiffness required precluded lightening original flaps cutting out sectionsAvailable data seems indicate no aerodynamic benefit having flaps continuation airfoil compared simpler flat flap used majority Stunt models faired-in flap looked good plans lost its appeal once actual building took place recommend wing tail built finished exclusive color separately fuselage Knowing weights wing tail well fixed hardware possible determine nose length summing moments individual components such center gravity located per theplans no ballast required nose length shown plans reflects best estimates based original model should very close optimum nose length will depend component weights engine selection finish weight spinner etc plan shows Discovery Retro 55 engine soon imported Ukraine distributed Tom Dixon engine has front intake rear exhaust sold very lightweight muffler powerbased direct comparison tests run 12 x 6 Zingeris SuperTigre 51 weight same An engine similar motor Discovery Retrothe Vorohive stunt engine Moscowis also expected imported later year SuperTigre 51 however has demonstrated work very well design readily available muffler being midfuselage instead outside eliminates eccentric weight drag side-exhaust engine would suggest increasing engine size 60 because weight penalty engine fuel tank structure fuel building fuselage make crutch consisting two engine bearers glued cross-grained 1/2-inch spacer glue joint should made very flat surface such piece glass hard table Mount two aluminum rails engine bearers small screws have countersunk blow surface aluminum rails prevent local crushing 62 Model Aviation R ACE 1/4 SCALE 80 WACO UPF-7 1/5 SCALE 73 MONOCOUPE D-145 1/4 SCALE 96 F R N ED EI MLITY iNTEGRITY SERVICE QtLALrTY UTEGUTV SERVICE QJJAL TTY INTEGRITY SERVICE 5O S 0AFTEDT 395O-AVaUetBlvd WALNUCA91789N ci U ci WA T PE RR 0 0 F CALL OR WRITE FOR FREE U HOT BOX FLIGHT SUPPORT FAX 315 5484099 Send Dollar Cede loq dealer first en Residents add 7% BROCHURE Li no 0 no J0 5 Li no 70 no engine bearer engine tightened down Make aluminum rails flat parallel sanding crutch assembly sandpaper laying hard flat surface crutch assembly incorporated fuselage assured engine casing will distorted slight misalignments rest fuselage Assembly fuselage sides together crutch plywood bulkhead just forward wing best done fuselage upside down flat surface using slow-curing epoxy entire fuselage built top block bottom sheet tack-glued place shaping sanding completed prior installation wing top block removed hollowed wall thickness cowl details should also completed time Installation booms stabilizer pushrod assembly wing done prior fuselage installation nature booms pretty much assures accurate alignment stabilizer incidence provided booms cut accurately However always good idea check stabilizer Robart incidence meter misalignment will result poor handling characteristics fuselage now glued wing/tail assembly taking care make cutout fuselage stabilizer good fit Again use slow-curing epoxy provide time accurately align fuselage Once confirmed controls operate smoothly gear mount bottom block top block can installed Note pushrod flap elevator made composite stiffness adjustable feature control system does allow pushrod braces used fuselage install top block slow-curing epoxy using masking tape position block until glue dries slow-curing epoxy provides superior bond allows ample time accurately position components reason use critical operations alignment takes precedence over speed assembly Trimming flying similar other Stunter Determine engine running reliably provides lap times 50-52 seconds 70 feet line best prop pitch between 5/4 51/3 inches using Prather pitch gauge very important sand blades pitch props off pitch least /2 inch Rev-Up blades tend /2-1 inch low Zingers tend fairly close constant blade stations No commercial props provide exact pitches required best performance given design flier should become comfortable altering pitch commercial props suit particular airplane initial center gravity should very close shown plans 64 Model Aviation e Off Knees I4th 3001b Seat Capacity nded Scale VOlbnetera Monitor RX& 7X Charge 4-Automatic Glow Plug Driver Top Quality Power Panel ted Fuseci Master Panel Control Switches NIcad Glow Battery Charger 12v Starter Outlet t 12V Glow Fuel Pump Fuel/Drain Switch 5- COMPARIMENT LIFT PliopA SroIlAOEThAY #Hoids 2 12V4amp Gell Cell Batteries Sure Starts #Automatioally Monitors Charge Status 12v Battery #Enough Storage Carry/Store 4 Transmitters #NEW- FUEL PLATFO0V 32oz FUEL BOTTLE FUEL LINE Wq NdIIWraVRCCUtEd TOLL FREE 1-500-468-2692 Mar West Mfg & Diet Co Inc 3339 Fitzgerald Rd Suite Rancho Cordova CA 95742 TEL 916 961-4 703 FAX 916983-1923 DARNED GOOD AIRMEN Lightest pitets eOa ass Seeds Bust Pilot KitMode USA #1081/8scale.$695 #1061/6scale795 #1051/5scale895 #1041/4scale995 #1031/3 scale.1595 #308-1/8 jet695 #307-1/7 jet795 Full Body Pilot Kit #20o6s ae$995 #2055s ae095 #2044sae95 #2033sae95 V wing high level flight low inverted flight likely wing warped rigid construction allsheet wing requires time-honored tradition tweaking flaps level wings sure however elevators parallel another since large empennage design sufficiently powerful roll airplane Set original control elevator horn such flaps move 135 elevator moving 100 wings level engine rnnning well begin flying various hard-corner maneuvers such inside square level flight speed close 50 seconds per lap engine lacks power maneuvers reduce head clearance 005 inch increments engine tends come too hard maneuvers runs too slowly level flight may overcompressed requiring additional head shims flights conducted 10% nitro 24% lubricant Taffinder PA fuel Provided airspeed gives lap times low-five-second range wings level leadout position can adjusted use leadout position counteract precession well trim model maneuvering independent leadout adjustment line permits Generally leadouts too far forward will loss tension above 450 leadouts too far back line tension will excessive level flight will drop off significantly maneuvers due excessive yawTip weight can also adjusted time first indication tip weight insufficient outside wing will up both upright inverted Also insufficient tip weight will lead loss tension above 450 Too much tip weight will cause violent wobble first last corner triangle Experience always best asset trimming out Stunter above sequence adjusting will help get sense what adjustment does Once have adjusted engine leadouts tip weight center gravity can move changing flap-toelevator ratio 135 100 determine like performance airplane Remember time change horn location elevator has corresponding change handle width compensate change control rate evaluation have validity Humbug 666 has demonstrated still room improvement design arena need settle enlarged versions Nobler willing explore new territory has also underscored value building much adjustment possible long weight strength alignment compromised once again adage no substitute cubic dollars Stunt models cubic inches rings true 4The Most Excitement Model Aviation Kit feature month Fling Thing SAIJ Hand launch glider 565-in span 340 in2 14 oz super launches balsa const complete info send us long SASE Send us ad orig receipt box end label receive $2 rebate Expires 4-31-95 Future FlightS 1995TM 1256 Prescott Ave Sunnyvale CA 94089 408735-8260 voice/Fax E-mail KWING@AOLCOMI Losing control can nightmare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience modeling radio repair So avoid inflated repair costs undue service time -- call Radio South fast economical in-house radio service can depend Radio SouthFub K ~jAM13tSie 3702 N Pacerepair information 904 4340909 800-962-7802 Pensacola FL 32505 Toll Free Order Line Orders please HAND LAUNOK RC SALPLANES 15 Sagitta ii span bait balsa heetnd foam wing pip ralsa fasa 7032 airfoil rrea 335 sq 7 oz refom micm PC install Kit LAUNCH BY HI START OR HAND THROW Mini Hi Start easy launches 150 length 30 1/8 00 rubber 120 tom line wood-real convenient ground base system does require hammer set up use Perfect launching 15 M HL sailpianes small areas Kit $2995 plan s-s sit-i Ipree s/h erdnred model kitl 15 M Jouster es span bolt balsacrans stereo & voeo equipment ann mucn sheeted foam wing pip balsa fase 7032 airfoil Quality aluminum body area 3en sq 5 no Two high quality bristle brushes before miom PC install Two interchangeable directional wends Operates sIngle 9 Volt Alkaline battery Inol included lit5$4995 Kits easy construct ana fly use spray A/C adapter loptionall Oneyearwarranly contact cement wing sheeting Complete r CALL TOLL FREE instructions flying tips included Wings have 007MINIVAC built tip wash out easy flying Thermal flying 7664O2 fun relaxing now inexpensive Send obeok money order d Check Money Order F T Bench Aerotech ox 509 Dept Ml Glendale CA 91209 58030 Cyrenus Washington MI 48094 Dealer Inquiries 818-244-6888 Fax 818-244-5858 810-781-7018We accept VISA MC AMEX SAME DAY SHIPMENT HEEDV Antiques Military uiviiian Helicopters Sailolanes worlds largest aircraft documentation 5500 different full color photo studies 19051995 30000 3-view line drawings New 1995 Catalog/Guide 168 pages Only $800 Canada $900 Overseas $1400 Bob Bankas Scale Model Research 3114 Yukon Avenue e Costa Mesa CA 92626 979-WJa May 1995 65
Edition: Model Aviation - 1995/05
Page Numbers: 58, 59, 60, 61, 62, 64, 65
/ U 0 Li reling press pipe oniy way compete 1 Stunt aerodynamics event fully developed last Team Trials demonstrated difference between performance conventional 60-powered airplane 58 Model Aviation 4 the tuned- pipe 40 less scatter between judges several very fine large engines coming scene Superligre 51 Discovery Retro 55 Ukraine Double Star 60 Moldova felt time once again explore aerodynamic avenues improved performance Using conventional engines allows time devoted airplane since engines relatively trouble-free easy adjust through air intake compression changes compared piped engines discussions Bill Netzeband seemed combination Humbug concept characterized midwing configuration coupled very large high-aspect-ratio stabilizer/elevator optimum use flaps could lead interesting result Since effect flaps Humbug could predetermined confidence decided make flapto-elevator ratio adjustable over large range Since associated drag flaps also unpredictable decided build airplane numerous engines could installed minimum cutting airframe dural landing gear used allow easy replacement prop clearance required two-position mounting pattern ensured safe takeoffs grass asphalt surfaces tank compartment made large enough ailow whatever capacities anticipated various candidate engines enough vertical room shimming ensure run characteristics compromised old trick incorporating finite amount play flapHumbug 666 Weight Data Total moments 21293 Component Moment WtArm Total Total weight5825 ounces Wing covered w/pushrod Stab/elevator/horn covered Booms covered Glue assemble above Tail wheel/stooge mount Rudder mechanism Tip wt Paint/fillets fuselage Pushrod/bracesflap elevator Total moments 21302 Landing gear/wheels Eng/prop/spinner/muffler Tank Fuselage w/gear mount Filter/eng bolts/tank shims 1975 350 150 50 25 25 75 350 100 250 1400 200 850 25 366 2030 1250 1400 2275 2300 0 550est 1325 250 1175 700 300 1075 7228 7105 1875 700 569 575 0 1925 1325 625 16450 1400 2550 268 Structural weights Booms Wing Stab/elevator Fuselage Struct wt 100 1600 2 oz extra flaps 250 850 2800 48% total Finish Covering Paint fuselage/fillets Finish wt Projected minimum weight 5625 525 350 875 May 1995 59 Very large control surfaces essential Humbugs author Humbug 666 Model has near-conventional exceptional performance High-aspect-ratio stab appearance unconventional aerodynamics Type CL Stunt Wingspan 53 3/4 inches Engine SuperTigre 51/Discovery Retro 55 Flying Weight 58 ounces Construction Built-up sheet-covered wing Covering/finish Dope 0 OMISS COSSTHUCTION NOTUE WINO MUD BE BJILTIN105000 SlEETMOTTO MOUNTS0118 PLY HELLCOANS MOUNTt-~TWO HALO ES INSTEAD OF ONE PIECE 00 SELECTLEASHES EOOE THAT OPTION 000A SECOND CENTER HEB DHWIOSU PLY SPAHFIBEHALASS ENTESIOU BALSA SHEET-TOPOH PLO FIREWALLOH- OULHIS HELLCHOSE WING CS BALSA SHEET MOTII SIHES IEl/____________ FISELDUE NOTESEE TEOT U PHOTOS EDT DETAILS ___________Ii ELEAD DOT AIIS --L IH BALSA STEET SPAR IS SHEPENOENTLY DOJUSTUW.E-IT2PLT-WINA TIP WEIAIIT MOO ______________________OS BOTTOB OP USA TIP ____________________I 4---UIIii __ T ____OPTIONAL 108 ELY HEAD NGPLANHUN TOPVIEW7 00RHO AINOESNOTE USD0BALSA SOLESFLAP HASTHAILINA tII- rniLITHEICALI SLOCOSOILIOAN LEAD WINS TIPS OUT CARLES IOU BALSA SHEET --END100 BALSA_SHEET IOU SPRUCE CS2PLT CONE RITOPIODY POINT WS BALM SIDES -FOR RARE RARHER CO BALSA USEET ISIHrBALSOCIURAISA WINO -O----~- -. 0HZ ELTOUTSIDE HISCOCESH AMOM CONBIARARLE OPTIONOISCOOEHTSIHESARFACE WOULD BE ST SIMUFFLER LOCATIONIONA PLHTAIIRHEELIN BETWEEN ISEE TEOT EDO DETAIL500 010WA DES IPOWER INFORMATIONOATCD TCH R NHEHNTSNOTE BAILS HATCH ON IAHUEUJRHOz- WING PATTERNS MODEL AVIATION SPECIFICATIONSLOCRALSA SHEET _________ HUMBUG 666 FUSELAGE LENATH FU POP FUSE____________________ WIND SPAS S5000DESISNED BY ROBERT BARON INKED PLAN BY OE DEMARCO RIM ORUA UNO SA IN STABILIZER SPAS OS-TOR REIAST.NO 02 UNOISE NI TO 55 to-elevator connection explored making feature adjustable along flap-to-elevator ratio Humbugs wing area 660 square inches midrange contemporary Stunt airplanes weight 58 ounces also very typical present-day airplanes Consequently performance increases perceived improvements handling ease adjustment can attributed aerodynamics rather unusually low wing loading flaps first placed between booms because structurally natural thing Using portion between booms flaps minimized prospect tip stalling before center wing booms could conceivably add efficiency flaps acting tip plates original engine Fox 40 flap-to-elevator ratio set 66 After few short flights evident power would needed make airplane perform competitively 60%-span flaps moving much less elevator clear drag too much engine wing could induced stall hard cornersAn OS FSR 45 slightly detuned Tom Dixon installed significant increase power over Fox 40 model immediately showed promise performing par fullspan flapped models After trying assortment props l15x5SmadefromaZinger 12x6 appeared provide good balance vertical thrust comfortable lap speeds 50-52-second range time serious testing various flap-to-elevator ratios began 45 easily pulling model around 70-foot lines first increased flap travel provide one-toone flap/elevator ratio corners sharper plane easier fly through maneuvers although level flight still required more-than-average attention Tom Dixon have joked little good too much just about right have since revised too much still insufficient Following premise increased flap travel 135 flap/100 elevator Again corners sharper airplane became still easier fly ratio plane could hammered hard maneuver no sign dropping inducing stall time increased drag showed up potential problem flying outside loop entered 300 elevation using full control maneuver resulted bottom loop still having approximately 10 feet clearance ground Try maneuver piped airplane see safe feels full control flight measured wrapping wire leadouts measuring travel used after wrap pushed leadout guide full control measured approximately 290 flap 220 elevator using full control complete outside loop model would slow visibly just start wobble indicating approaching tip stall point Humbugs handling characteristics very pleasant begged question what would result power installed went SuperTigre 51 coupled plastic spinner lightweight expansion muffler weighed no FSR 45 original metal spinner Adamisin muffler no CC weight change significant increase torque now tap result using same prop no change level-flight speed fullcontrol outside loop resulted clean tight loop no wobble exit now airplane could caused stall wobble regardless control input yet still extremely competitive performance increased torque hence braking action 51 Humbug easier fly since acceleration vertical dive reduced 45 Time duration wingover beginning pullup end pullout mere 302 seconds theoretical time 50-second lap assuming corner radius 15 feet would 269 seconds no loss airspeed 3 second lost due plane slowing through corner climbing vertically demonstrates significant vertical capability provided 51 also apparent efficiency model creating excessive drag developing lift through corner increased torque 51 decided once again try 11 flap-to-elevator ratio since chance would produce tighter corner 1351 ratio Sure enough corner tighter came price noticeably slowing previous ratio increase torque 51 sharp increase drag too much engine wobble likely due tip stall could induced high control inputs now appeared have stumbled onto new way trim maximum performance CL Stunter optimize flap-toelevator ratio past flying just below stall achieved reducing total control travel moving CG forward Both techniques lead reduced performance over provided optimizing flap-to-elevator ratio Much test flying done very light 0-2 mph wind has advantage allowing imbalance trim easily spotted since wind factor flights under conditions clearly demonstrated importance having engine power come off classic Stunt fashion May1995 61 IKON NWST Since 1977 IKON offers largest selection giant scale kits world order kits call 1-800-327-7198 catalog fine kits send $4 00 adjusting compression increase power during two-cycle portion can altered too little compression airplane slows too much begins lose tension too much compression airplane lurches surge power becomes unbalanced leading wobble Flying under marginal conditions emphasized delicate balance between two- four-cycle power having twofour break important smooth execution pattern control system installed minimal play using Delrin bellerank Du-Bro ball-end sockets flap elevator horns Note angle horns flap elevator angle bellcrank pushrod flap horn created bellerank location behind main spar angle elevator pushrod flap elevator horns due midwing configuration leads unequal travel unless controls installed per plans CC 20% mean aerodynamic chord combined large stabilizer indicated Humbug would stableit However level flight still required concentration maintain smoothness began experiment varying amounts controlled play introduced elevator horn removed ball socket sleeved retaining screw socket different sized tubing safetyed arrangement washer screw Varying amounts free play can incorporated control system changing other variable found sufficient play allow trailing edge elevator move 1/ inch total flaps restrained airplane could immediately flown easily level flight wingover apparent model maintaining accurate track testing particularly good day smooth air cloudless blue sky Under conditions could see smoke trail muffler confirmed track wingover extremely straight anticipating dead spot intersection horizontal vertical eights due play controls could detect Putting play elevator-to-flap linkage appears rare instances clear benefit no apparent downside CONSTRUCTION Fabrication Humbug 666 conventional CL Stunt models few building techniques worthy note original model built using conventional open-bay wing construction covered 21st Century cloth Although somewhat easier apply MonoKote 21st Century material contributed little stiffness wing torsion noticeably weaker MonoKote regard addition weight penalty compared MonoKote approximately two ounces Since has established stiffer airframes perform much better windy weather construction changed sheet-covered wing dope finish weight penalty secondgeneration airplane weight additional planking solid-sheet flaps shown drawing save about two ounces over complex built-up sheet flaps followed airfoil original hinging prototype done ends flap stiffness required precluded lightening original flaps cutting out sectionsAvailable data seems indicate no aerodynamic benefit having flaps continuation airfoil compared simpler flat flap used majority Stunt models faired-in flap looked good plans lost its appeal once actual building took place recommend wing tail built finished exclusive color separately fuselage Knowing weights wing tail well fixed hardware possible determine nose length summing moments individual components such center gravity located per theplans no ballast required nose length shown plans reflects best estimates based original model should very close optimum nose length will depend component weights engine selection finish weight spinner etc plan shows Discovery Retro 55 engine soon imported Ukraine distributed Tom Dixon engine has front intake rear exhaust sold very lightweight muffler powerbased direct comparison tests run 12 x 6 Zingeris SuperTigre 51 weight same An engine similar motor Discovery Retrothe Vorohive stunt engine Moscowis also expected imported later year SuperTigre 51 however has demonstrated work very well design readily available muffler being midfuselage instead outside eliminates eccentric weight drag side-exhaust engine would suggest increasing engine size 60 because weight penalty engine fuel tank structure fuel building fuselage make crutch consisting two engine bearers glued cross-grained 1/2-inch spacer glue joint should made very flat surface such piece glass hard table Mount two aluminum rails engine bearers small screws have countersunk blow surface aluminum rails prevent local crushing 62 Model Aviation R ACE 1/4 SCALE 80 WACO UPF-7 1/5 SCALE 73 MONOCOUPE D-145 1/4 SCALE 96 F R N ED EI MLITY iNTEGRITY SERVICE QtLALrTY UTEGUTV SERVICE QJJAL TTY INTEGRITY SERVICE 5O S 0AFTEDT 395O-AVaUetBlvd WALNUCA91789N ci U ci WA T PE RR 0 0 F CALL OR WRITE FOR FREE U HOT BOX FLIGHT SUPPORT FAX 315 5484099 Send Dollar Cede loq dealer first en Residents add 7% BROCHURE Li no 0 no J0 5 Li no 70 no engine bearer engine tightened down Make aluminum rails flat parallel sanding crutch assembly sandpaper laying hard flat surface crutch assembly incorporated fuselage assured engine casing will distorted slight misalignments rest fuselage Assembly fuselage sides together crutch plywood bulkhead just forward wing best done fuselage upside down flat surface using slow-curing epoxy entire fuselage built top block bottom sheet tack-glued place shaping sanding completed prior installation wing top block removed hollowed wall thickness cowl details should also completed time Installation booms stabilizer pushrod assembly wing done prior fuselage installation nature booms pretty much assures accurate alignment stabilizer incidence provided booms cut accurately However always good idea check stabilizer Robart incidence meter misalignment will result poor handling characteristics fuselage now glued wing/tail assembly taking care make cutout fuselage stabilizer good fit Again use slow-curing epoxy provide time accurately align fuselage Once confirmed controls operate smoothly gear mount bottom block top block can installed Note pushrod flap elevator made composite stiffness adjustable feature control system does allow pushrod braces used fuselage install top block slow-curing epoxy using masking tape position block until glue dries slow-curing epoxy provides superior bond allows ample time accurately position components reason use critical operations alignment takes precedence over speed assembly Trimming flying similar other Stunter Determine engine running reliably provides lap times 50-52 seconds 70 feet line best prop pitch between 5/4 51/3 inches using Prather pitch gauge very important sand blades pitch props off pitch least /2 inch Rev-Up blades tend /2-1 inch low Zingers tend fairly close constant blade stations No commercial props provide exact pitches required best performance given design flier should become comfortable altering pitch commercial props suit particular airplane initial center gravity should very close shown plans 64 Model Aviation e Off Knees I4th 3001b Seat Capacity nded Scale VOlbnetera Monitor RX& 7X Charge 4-Automatic Glow Plug Driver Top Quality Power Panel ted Fuseci Master Panel Control Switches NIcad Glow Battery Charger 12v Starter Outlet t 12V Glow Fuel Pump Fuel/Drain Switch 5- COMPARIMENT LIFT PliopA SroIlAOEThAY #Hoids 2 12V4amp Gell Cell Batteries Sure Starts #Automatioally Monitors Charge Status 12v Battery #Enough Storage Carry/Store 4 Transmitters #NEW- FUEL PLATFO0V 32oz FUEL BOTTLE FUEL LINE Wq NdIIWraVRCCUtEd TOLL FREE 1-500-468-2692 Mar West Mfg & Diet Co Inc 3339 Fitzgerald Rd Suite Rancho Cordova CA 95742 TEL 916 961-4 703 FAX 916983-1923 DARNED GOOD AIRMEN Lightest pitets eOa ass Seeds Bust Pilot KitMode USA #1081/8scale.$695 #1061/6scale795 #1051/5scale895 #1041/4scale995 #1031/3 scale.1595 #308-1/8 jet695 #307-1/7 jet795 Full Body Pilot Kit #20o6s ae$995 #2055s ae095 #2044sae95 #2033sae95 V wing high level flight low inverted flight likely wing warped rigid construction allsheet wing requires time-honored tradition tweaking flaps level wings sure however elevators parallel another since large empennage design sufficiently powerful roll airplane Set original control elevator horn such flaps move 135 elevator moving 100 wings level engine rnnning well begin flying various hard-corner maneuvers such inside square level flight speed close 50 seconds per lap engine lacks power maneuvers reduce head clearance 005 inch increments engine tends come too hard maneuvers runs too slowly level flight may overcompressed requiring additional head shims flights conducted 10% nitro 24% lubricant Taffinder PA fuel Provided airspeed gives lap times low-five-second range wings level leadout position can adjusted use leadout position counteract precession well trim model maneuvering independent leadout adjustment line permits Generally leadouts too far forward will loss tension above 450 leadouts too far back line tension will excessive level flight will drop off significantly maneuvers due excessive yawTip weight can also adjusted time first indication tip weight insufficient outside wing will up both upright inverted Also insufficient tip weight will lead loss tension above 450 Too much tip weight will cause violent wobble first last corner triangle Experience always best asset trimming out Stunter above sequence adjusting will help get sense what adjustment does Once have adjusted engine leadouts tip weight center gravity can move changing flap-toelevator ratio 135 100 determine like performance airplane Remember time change horn location elevator has corresponding change handle width compensate change control rate evaluation have validity Humbug 666 has demonstrated still room improvement design arena need settle enlarged versions Nobler willing explore new territory has also underscored value building much adjustment possible long weight strength alignment compromised once again adage no substitute cubic dollars Stunt models cubic inches rings true 4The Most Excitement Model Aviation Kit feature month Fling Thing SAIJ Hand launch glider 565-in span 340 in2 14 oz super launches balsa const complete info send us long SASE Send us ad orig receipt box end label receive $2 rebate Expires 4-31-95 Future FlightS 1995TM 1256 Prescott Ave Sunnyvale CA 94089 408735-8260 voice/Fax E-mail KWING@AOLCOMI Losing control can nightmare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience modeling radio repair So avoid inflated repair costs undue service time -- call Radio South fast economical in-house radio service can depend Radio SouthFub K ~jAM13tSie 3702 N Pacerepair information 904 4340909 800-962-7802 Pensacola FL 32505 Toll Free Order Line Orders please HAND LAUNOK RC SALPLANES 15 Sagitta ii span bait balsa heetnd foam wing pip ralsa fasa 7032 airfoil rrea 335 sq 7 oz refom micm PC install Kit LAUNCH BY HI START OR HAND THROW Mini Hi Start easy launches 150 length 30 1/8 00 rubber 120 tom line wood-real convenient ground base system does require hammer set up use Perfect launching 15 M HL sailpianes small areas Kit $2995 plan s-s sit-i Ipree s/h erdnred model kitl 15 M Jouster es span bolt balsacrans stereo & voeo equipment ann mucn sheeted foam wing pip balsa fase 7032 airfoil Quality aluminum body area 3en sq 5 no Two high quality bristle brushes before miom PC install Two interchangeable directional wends Operates sIngle 9 Volt Alkaline battery Inol included lit5$4995 Kits easy construct ana fly use spray A/C adapter loptionall Oneyearwarranly contact cement wing sheeting Complete r CALL TOLL FREE instructions flying tips included Wings have 007MINIVAC built tip wash out easy flying Thermal flying 7664O2 fun relaxing now inexpensive Send obeok money order d Check Money Order F T Bench Aerotech ox 509 Dept Ml Glendale CA 91209 58030 Cyrenus Washington MI 48094 Dealer Inquiries 818-244-6888 Fax 818-244-5858 810-781-7018We accept VISA MC AMEX SAME DAY SHIPMENT HEEDV Antiques Military uiviiian Helicopters Sailolanes worlds largest aircraft documentation 5500 different full color photo studies 19051995 30000 3-view line drawings New 1995 Catalog/Guide 168 pages Only $800 Canada $900 Overseas $1400 Bob Bankas Scale Model Research 3114 Yukon Avenue e Costa Mesa CA 92626 979-WJa May 1995 65