SPORT AEROBATICS Ron Van Putte ITS ABOUT time frozen North think about coming Out hibernation same true southerners dont like temperatures below 50 degrees Yes Virginia does get cold Florida no matter what Chamber Commerce says case over country fliers thinking about getting out last years airplanes radio equipment heading flying field Before would good idea check things out first flight isnt disaster things can happen airplane/engine/radio combinations after put away winter Prevention cheap should invest little time maximize chances good start new flying season obvious item need preventive maintenance radio system Rather try steal some George Myers thunder Ill mention few major items consider because probably has plans extensive discussion springtime radio system mainte nance Whens last time transmitter output peaked receiver tuned trans mitter Both jobs easily cheaply handled trained technicians its amazing much improvement can get system range Generally should leave alone because theres little good can its illegal anyone besides licensed technician tamper transmitter radio frequency tuning However can work servos recommend leam local expert have taught people club scared opening servo service short time later telling others easy offeringto teach howto Besides servicing servos hardly exciting trained technicians although usually happy perform job $20 30 per hour Checking broken gear teeth replacing gears cleaning lubricating potentiometers replac ing motors reversing servo direction jobs us can Money saved doing own minor servo repair can used buy fuel props glow plugs etc Anotherjob can should cleaning connectors gold plated contacts can get dirty cause erratic performance can TV tuner cleaner soft brush old toothbrush clean rag thats needed put connector contacts good shape season youre cleaning contacts also check connectors wires being held strand two Did know should clean outside transmitter antenna Give shot TV tuner cleaner work out few times wipe off clean rag Youll amazed black garbage ends up rag dirt inhibits transmission signal airplane Youve regularly charging batteries radio system periodically performing battery discharges havent should whether have capacity batteries should checked before new season begins commercial battery cyclers can easily tell whether batteries ready go should replaced Battery replacement isnt cheap certainly cheaper alternatives radio checked out can turn attention airplane engine things look results wear tear since its assumed airplane flyable put up season Check hinges control horns devises verge giving Out have replace hinges horns devises will probably rudder since thats generally tough environment due aerodynamic turbulence shouldprobably replace ofthe hinges control surface Wits necessary replace job doesnt have repeated often Cracks scuffs airplane should investigated repaired Cracks major struc tural members can real problem fix innovative techniques sometimes called Ordinary fatigue cracks can filled cyano acrylates like Hot Stuff Zap etc thinned epoxy injected hypodermic syringe However cracks wing spars skins often require minor surgery back up cracks plywood balsa doublers good way repair cracks foam wing skins fill crack epoxy overlap area lightweight fiberglass cloth using polyester resin epoxy adhesive Generally breaks aircraft external surface permits fuel residue soak structure should repaired refinished Fuel can cause wood rot often loosens glue joints structure Partic ular attention kind problem should made area engine installation would just embarassing engine falls Out airplane still firmly bolted firewall similarly disastrous situation failure wing attachment fittings bolt wings make sure fuselage blocks still solidly attached have seen wings flutter down long after fuselage impaled itself ground discovered fuselage blocks still bolted wing addition shouldnt need mentioned don t use last years rubber bands ifyou attach wing way startled discover people dont put new rubber bands spring Rubber bands cheap Propellers arent cheap fuel soaked beauty have airplane real hazard may testify outstanding ability land airplane clobbering prop fuel has soaked weakened blade might end up sticking someone else car etc spring fellow flier called up asked Continued page 98 26 Model Aviation Crashes bad news What caused last Maybe little springtime preventive maintenance could prevent scene didnt help Dick McGrawhis caused pilot error tUdytflistaiIcl .jn Chidgeys newTiger Tail 4 has bolt-on stabilizer feature makes craft easier transport CUT / 4 OFEP SLIT ALONG THE FULL LENGTH OF THE MATING SURFACES Still Using bid Fashioned HingesS A - will gain control efficiency eliminating gap between moveable stationary control surfaces EASY TO INSTALL IA/STALL bINGE USE STRAIGHT PAl TO MAKE SMALL HOLE EVERY IA/CR OR SO ORP CYAAIOACRYLATE GLIE Al HOLES CAPILLARY ACOON aILL CARRY GLUE ALONG ENTRE JO/NT PRIcE 3 ff l95N FOR 400 rIGAIAL SECVR/TY AS A/EEOEO FOR FINISHING ____________________________________ SENT SMALL P/Al EVERY FEW / HES CUT OFF FLUSH FLL AGO SAAO will amazed performance gained using simple inexpen sive improvement FREE MOVEMENT 450 STRONG AND LIGHTWEIGHT COMPLETELY FUELPROOF COMPATABLE WITH ALL IRON-ON MATER IALS COMES IN 3 FT LENGTHS SMALL 1/5 OR LARGE 1/A added main stringers along sides Leave off rear top stringers until tail surfaces installed Omit bottom rear stringers until wing fitted fuselage later top forward section lower forward section sheeted 3/32 can planked using 3/32 strips Add s ply plates mounting com pression struts s ply skid base spruce block cut support tail skid added engine installation now completed used Webra 91 Edson adjustable mount Edson thrust wedges give rightthrust offset After wings tail surfaces have built installed fuselage finished adding rear stringers top bottom sections Wing Fillet After wing has installed / 16 ply base glued wing saddle extend ing 3 inches out fuselage sides wing assembled fuselage base will fit properly dihedral angle forward section fillet built up 2 balsa blocks cut fit curve fuselage airfoil Fill behind wing bulkhead #6 2 soft balsa block form aft end fillet Cut fillet bulkheads 4 s balsa install fillet planked s X 4 strips little final carving sanding completes fillet Engine Cowl form necessary build cowl easily made around 1112 form could find nothing size cut two ply discs spaced give 4-wide form mounted stand easy work layer 3/32 ply wrapped tightly around form second layer added over first joints staggered Use masking tape hold ply place glue dries Layers ofs balsa Send Free info ou f ne p oducts FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 GET ORGANIZED s set 014 05045 tries heMs over 4 years yost favorie 8 II magazines 4 MAG FILES $495 Send $495 pies 5100 tar postage handierg 0GM INOUSThIES PO Box 388-K DOVER NH 03820 added 4 ply After layer added couple large rubber bands aroundthe structure will keep pressed together until dry completed cowl structure slid off formthen carved sanded final shape Cowl attached firewall four L-shaped music wire brackets permanently mounted inside cowl fastened firewall sheet-metal screws Exhaust stacks formed aluminum tube mounted inside cowl spruce blocks Wheel Fairings built up lamina tions ply balsa layers have glued together weight clamp heavily allow dry completely before carving shape Also before shaping align two halves fairing dowels front rear fairings Spot-glue halves together carve sand final shape Landing gear legs formed 3/16 music wire Both forward legs identical rear leg must formed right left part Drawings show side view rear leg front will have same upper bends front leg except side will bend right other side will bend left front rear legs mounted wing mount blocks straps screws Bind two legs together copper wire solder preferable use silver solder joint Du-Bro 6Xdia wheels retained axles wheel collar side wheel assure proper centering wheel fairings fastened together over wheel legs held together spot-gluing can screwed together short screws prefer Fin Rudder vertical surfaces built up /4 sq balsa i/ply fin leading edge 4 spruce fin trailing rudder leading edge Rudder trailing edge cut i4 balsa Scale hinges installed shown drawings made 4 ply epoxied trailing edge fin lower aft end fuselage can use favorite commercial hinges place scale hinges shown 4-ply insert built rudder base rudder hom tail surfaces have no airfoil simply rounded way around fin rudder may also built solid 4 sheet balsa simpler structure preferred Weight no problem model will probably come out little nose-heavy case real air craft real aircraft 50 lb anvil mounted under stab bring CG belonged continued RC Aerobatics/Van Putte continued page 26 okay use fuel tumed blue originally red turned out left airplane full fuel tank fall fuel reacted brass tank tubing turning blue Chances less emptied tank last fall little bit fuel can peculiar things fuel tank Filters can clog up fuel line gets soft gummy sediments can develop bottom tank Castor oil based fuels can give real problems since oil tends spoil actually turn rancid storage moral flush out tank check out fittings tubing problems have last years castor oil based fuel left pour some clean container look little white flakes suspended flakes castor oil precipitated out fuel mixture wouldnt use dont like castor oil fuel anyway because brown mess gets over head cooling fins engine lot good commercial products cleaning engines baked-on castor oil just cleaned dozen such engines bought flier getting out hobby quart GMP Motor Keen cleaned last engine nicely first Whatever use dont try commercial oven cleaner attacks aluminum After youve done everything else checkto see engine servos securely bolted down settle back enjoy good feeling confidence equipment can give Clubs have kinds awardsbutlneverheard about Crasher Trophy until reading Bell Air R/C Flyer Belliogham Washington new award announced recent newsletter follows now have Crasher Trophy basic rules follows eceive award must crash presence current holder trophy get rid trophy must present next guy crashes must present him immediately say must have trophy you should happen earn award will allowed fly bringing trophy Boy thats rubbing Ive reading quite few newsletters FCC making refunds Citizen Band oper ators paid up $20 licenses years 1970 1976 get special booklet need apply refund write FCC Fee Refund Program Box 1788 Hyattsville MD 20788 Ron Van Putie 12 Connie Drive Shalimar FL 32579 98 Model Aviation GAPLESS HINGE SLOTTER Simplifies installation Gapless Hinges Makes Slots 4 Szes Baisa 5-S-S -t APRiCE 195
Edition: Model Aviation - 1980/05
Page Numbers: 26, 98
SPORT AEROBATICS Ron Van Putte ITS ABOUT time frozen North think about coming Out hibernation same true southerners dont like temperatures below 50 degrees Yes Virginia does get cold Florida no matter what Chamber Commerce says case over country fliers thinking about getting out last years airplanes radio equipment heading flying field Before would good idea check things out first flight isnt disaster things can happen airplane/engine/radio combinations after put away winter Prevention cheap should invest little time maximize chances good start new flying season obvious item need preventive maintenance radio system Rather try steal some George Myers thunder Ill mention few major items consider because probably has plans extensive discussion springtime radio system mainte nance Whens last time transmitter output peaked receiver tuned trans mitter Both jobs easily cheaply handled trained technicians its amazing much improvement can get system range Generally should leave alone because theres little good can its illegal anyone besides licensed technician tamper transmitter radio frequency tuning However can work servos recommend leam local expert have taught people club scared opening servo service short time later telling others easy offeringto teach howto Besides servicing servos hardly exciting trained technicians although usually happy perform job $20 30 per hour Checking broken gear teeth replacing gears cleaning lubricating potentiometers replac ing motors reversing servo direction jobs us can Money saved doing own minor servo repair can used buy fuel props glow plugs etc Anotherjob can should cleaning connectors gold plated contacts can get dirty cause erratic performance can TV tuner cleaner soft brush old toothbrush clean rag thats needed put connector contacts good shape season youre cleaning contacts also check connectors wires being held strand two Did know should clean outside transmitter antenna Give shot TV tuner cleaner work out few times wipe off clean rag Youll amazed black garbage ends up rag dirt inhibits transmission signal airplane Youve regularly charging batteries radio system periodically performing battery discharges havent should whether have capacity batteries should checked before new season begins commercial battery cyclers can easily tell whether batteries ready go should replaced Battery replacement isnt cheap certainly cheaper alternatives radio checked out can turn attention airplane engine things look results wear tear since its assumed airplane flyable put up season Check hinges control horns devises verge giving Out have replace hinges horns devises will probably rudder since thats generally tough environment due aerodynamic turbulence shouldprobably replace ofthe hinges control surface Wits necessary replace job doesnt have repeated often Cracks scuffs airplane should investigated repaired Cracks major struc tural members can real problem fix innovative techniques sometimes called Ordinary fatigue cracks can filled cyano acrylates like Hot Stuff Zap etc thinned epoxy injected hypodermic syringe However cracks wing spars skins often require minor surgery back up cracks plywood balsa doublers good way repair cracks foam wing skins fill crack epoxy overlap area lightweight fiberglass cloth using polyester resin epoxy adhesive Generally breaks aircraft external surface permits fuel residue soak structure should repaired refinished Fuel can cause wood rot often loosens glue joints structure Partic ular attention kind problem should made area engine installation would just embarassing engine falls Out airplane still firmly bolted firewall similarly disastrous situation failure wing attachment fittings bolt wings make sure fuselage blocks still solidly attached have seen wings flutter down long after fuselage impaled itself ground discovered fuselage blocks still bolted wing addition shouldnt need mentioned don t use last years rubber bands ifyou attach wing way startled discover people dont put new rubber bands spring Rubber bands cheap Propellers arent cheap fuel soaked beauty have airplane real hazard may testify outstanding ability land airplane clobbering prop fuel has soaked weakened blade might end up sticking someone else car etc spring fellow flier called up asked Continued page 98 26 Model Aviation Crashes bad news What caused last Maybe little springtime preventive maintenance could prevent scene didnt help Dick McGrawhis caused pilot error tUdytflistaiIcl .jn Chidgeys newTiger Tail 4 has bolt-on stabilizer feature makes craft easier transport CUT / 4 OFEP SLIT ALONG THE FULL LENGTH OF THE MATING SURFACES Still Using bid Fashioned HingesS A - will gain control efficiency eliminating gap between moveable stationary control surfaces EASY TO INSTALL IA/STALL bINGE USE STRAIGHT PAl TO MAKE SMALL HOLE EVERY IA/CR OR SO ORP CYAAIOACRYLATE GLIE Al HOLES CAPILLARY ACOON aILL CARRY GLUE ALONG ENTRE JO/NT PRIcE 3 ff l95N FOR 400 rIGAIAL SECVR/TY AS A/EEOEO FOR FINISHING ____________________________________ SENT SMALL P/Al EVERY FEW / HES CUT OFF FLUSH FLL AGO SAAO will amazed performance gained using simple inexpen sive improvement FREE MOVEMENT 450 STRONG AND LIGHTWEIGHT COMPLETELY FUELPROOF COMPATABLE WITH ALL IRON-ON MATER IALS COMES IN 3 FT LENGTHS SMALL 1/5 OR LARGE 1/A added main stringers along sides Leave off rear top stringers until tail surfaces installed Omit bottom rear stringers until wing fitted fuselage later top forward section lower forward section sheeted 3/32 can planked using 3/32 strips Add s ply plates mounting com pression struts s ply skid base spruce block cut support tail skid added engine installation now completed used Webra 91 Edson adjustable mount Edson thrust wedges give rightthrust offset After wings tail surfaces have built installed fuselage finished adding rear stringers top bottom sections Wing Fillet After wing has installed / 16 ply base glued wing saddle extend ing 3 inches out fuselage sides wing assembled fuselage base will fit properly dihedral angle forward section fillet built up 2 balsa blocks cut fit curve fuselage airfoil Fill behind wing bulkhead #6 2 soft balsa block form aft end fillet Cut fillet bulkheads 4 s balsa install fillet planked s X 4 strips little final carving sanding completes fillet Engine Cowl form necessary build cowl easily made around 1112 form could find nothing size cut two ply discs spaced give 4-wide form mounted stand easy work layer 3/32 ply wrapped tightly around form second layer added over first joints staggered Use masking tape hold ply place glue dries Layers ofs balsa Send Free info ou f ne p oducts FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 GET ORGANIZED s set 014 05045 tries heMs over 4 years yost favorie 8 II magazines 4 MAG FILES $495 Send $495 pies 5100 tar postage handierg 0GM INOUSThIES PO Box 388-K DOVER NH 03820 added 4 ply After layer added couple large rubber bands aroundthe structure will keep pressed together until dry completed cowl structure slid off formthen carved sanded final shape Cowl attached firewall four L-shaped music wire brackets permanently mounted inside cowl fastened firewall sheet-metal screws Exhaust stacks formed aluminum tube mounted inside cowl spruce blocks Wheel Fairings built up lamina tions ply balsa layers have glued together weight clamp heavily allow dry completely before carving shape Also before shaping align two halves fairing dowels front rear fairings Spot-glue halves together carve sand final shape Landing gear legs formed 3/16 music wire Both forward legs identical rear leg must formed right left part Drawings show side view rear leg front will have same upper bends front leg except side will bend right other side will bend left front rear legs mounted wing mount blocks straps screws Bind two legs together copper wire solder preferable use silver solder joint Du-Bro 6Xdia wheels retained axles wheel collar side wheel assure proper centering wheel fairings fastened together over wheel legs held together spot-gluing can screwed together short screws prefer Fin Rudder vertical surfaces built up /4 sq balsa i/ply fin leading edge 4 spruce fin trailing rudder leading edge Rudder trailing edge cut i4 balsa Scale hinges installed shown drawings made 4 ply epoxied trailing edge fin lower aft end fuselage can use favorite commercial hinges place scale hinges shown 4-ply insert built rudder base rudder hom tail surfaces have no airfoil simply rounded way around fin rudder may also built solid 4 sheet balsa simpler structure preferred Weight no problem model will probably come out little nose-heavy case real air craft real aircraft 50 lb anvil mounted under stab bring CG belonged continued RC Aerobatics/Van Putte continued page 26 okay use fuel tumed blue originally red turned out left airplane full fuel tank fall fuel reacted brass tank tubing turning blue Chances less emptied tank last fall little bit fuel can peculiar things fuel tank Filters can clog up fuel line gets soft gummy sediments can develop bottom tank Castor oil based fuels can give real problems since oil tends spoil actually turn rancid storage moral flush out tank check out fittings tubing problems have last years castor oil based fuel left pour some clean container look little white flakes suspended flakes castor oil precipitated out fuel mixture wouldnt use dont like castor oil fuel anyway because brown mess gets over head cooling fins engine lot good commercial products cleaning engines baked-on castor oil just cleaned dozen such engines bought flier getting out hobby quart GMP Motor Keen cleaned last engine nicely first Whatever use dont try commercial oven cleaner attacks aluminum After youve done everything else checkto see engine servos securely bolted down settle back enjoy good feeling confidence equipment can give Clubs have kinds awardsbutlneverheard about Crasher Trophy until reading Bell Air R/C Flyer Belliogham Washington new award announced recent newsletter follows now have Crasher Trophy basic rules follows eceive award must crash presence current holder trophy get rid trophy must present next guy crashes must present him immediately say must have trophy you should happen earn award will allowed fly bringing trophy Boy thats rubbing Ive reading quite few newsletters FCC making refunds Citizen Band oper ators paid up $20 licenses years 1970 1976 get special booklet need apply refund write FCC Fee Refund Program Box 1788 Hyattsville MD 20788 Ron Van Putie 12 Connie Drive Shalimar FL 32579 98 Model Aviation GAPLESS HINGE SLOTTER Simplifies installation Gapless Hinges Makes Slots 4 Szes Baisa 5-S-S -t APRiCE 195