rhj Keith Trostle THE POPULARITY power various types models growing Per haps reasons trend increasing price materials used hobby particularly balsa engines fuel Initial investment build keep /2A model flying considerably less larger counterparts Cox TD lists less $2000 proper care will give hours trouble-free operation hours flying time will use considerably less fuel too have ventured using Y2A power models others speed free flight events have received bonus surprise performance models demonstrate Reference made several glowing articles published last two years RC pattern ships fast growing Y2A RC pylon events Interest Precision Aerobatics stunt similarly growing across country interest has further kindled unofficial stunt events sponsored Cox last three Nit tionals Precision Aerobatic Model Pilots Association PAMPA assisted Cox running unofficial events year people have participated larger numbers saying will compete next year standardize event recent 76 Nats special PAMPA committee formed draw up set rules meant easily understood relatively non-restrictive keep event could compete enjoy Arlie Preszler chairman committee has considerable ex perience flying /2A stunt contests North ern California Arlie also volunteered capable services 76 Nats stunt Event Director contributions appreciated participate event rules used 76 Nats endorsed PAMPA used guidelines local level competition Re finements following guidelines will made necessary published monthly PAMPA publication Stunt News experience gained PRECISION AEROBATICS Engine displacement 051 cu maxi mum Builder-of-the-model No requirement Entries entry per pilot pilot per airplane Back-up model per AMA rules allowed Appearance points None Lines pull test 008 diameter 5 lbs Pattern Per AMA rule book CL Pre cision Aerobatics Attempts Per AMA rule book CL Precision Aerobatics Identification Per AMA rule book CL Precision Aerobatics igh num bers permissible Competition results far have indi cated /2A stunt pleasant diversion Precision Aerobatics event pressure competition present stunt compared Precision Aerobatics certainly low key event can used introduction Precision Aerobatics minimum vestment time still gaining beneficial experience discipline necessary competitive Precision Aero batics models just plain fun build fly After seeing fully built-up Y2A stunt model during 1975 Winston-Salem Southeastern Championships wanted try own After reviewing files several Y2A stunt models found have published over last sev eral years include Ed Hunts Envoy Model Airplane News August 1964 Dick Mathis Pinto Flying Models December 1972 recently Tom Dixons Gremlin Model Builder May 1975 Also Larry Renger has several articles Flying Models about use foam-sheet wings available Cox used Cox Super Stunters felt improvements could made incorporating use larger flaps larger horizontal tail thicker airfoil what seen previous /2A designs relatively larger flaps tail used Tercel inspired Genesis/Scorpio/Stunt Machine full-size Precision Aerobatic designs Bob Hunt Bill Simons Gene Schaffer New Jersey/New York area models capable pilots flying some better patterns country square maneuvers among best will see turning ability Tercel 28 Model Aviation Cowl fits snugly around cylinder Cox QRC TO Note plumbing Uniflow tankas shown planwill give a-mm plus run Right Winner unofficial 1/2A Stunt event 75 Nats Tercel utilizes larger flaps bigger stabilizer 20%-thick blunt edged wing cowl removed show close fit engine full power TD used larger model possiblesuch 240 250 sq wing span 36 37 has certainly confirmed approach strongly believe thick blunt airfoils Precision Aerobatics airfoil shown design 20% thick including flaps similar Bart Klapinskis 1967 Nats winning Tempest quite popular West Coast size wing determined approximate average existing stunt designs lack vertical tail may appeal some concept taken trend seen East Coast attempt improve impression turning sharper corners keeping straight fuselage low profile use vertical tail Tercel may improve handling characteristics vertical maneuvers recommended feel appearance model would enhanced model shown plans easily adaptable profile type fuselage piece carefully selected t balsa 1/32 plywood doublers recom mended aft fuselage width should tapered just forward flap hinge line no 3/16 stabilizer hinge line reduce weight much possible No claim made ulti mate stunt design will prob ably never see such model feel design presented offers some ad vancement over previous models Its performance can termed satisfac tory demonstrated its win 75 Nats unofficial event performance stunt models particularly wind cannot yet compare curRight Access hole reveals use threaded ad justment horn attachment may wish try Below Front enddoublers mounts tank two bulkheadsattach unit wing Sides formers attach wing/nose unit rent 35- 46-powered Precision Aero batics designs time improvements may made will see Preci sion Aerobatic models competitive larger models may too far away now under certain condi tions much learned yet optimum size stunt Tercel can flown CoxQRC 049 Using full power available Cox TD larger model could considered much larger performance would enhanced known 240 250 sq wing 36 37 span feasible weight must kept absolute minimum Probably some improvement could realized after some experimenta tion airfoil sections 22% thick sec tion could considered section simi lar Al Rabe uses Mustunt American Modeler February 1973 successful super semi-scale stunters should explored own design phi losophies can experimented proven disproven considerably easier cheaper quicker models larger models Excellent cored foam wings 1/32 balsa sheeting available de sign Control Specialties Co 205 Wood Ave PO Box 268 Middlesex NJ 08846 Telephone ac 201 469-1663 Call write price availability Use foam wings recommended shortens construction time wing will September 1976 29 interest Half-A Stunt growing leaps bounds exceptional design well-known expert guarantees can fly acceptable pattern Above Tercel spitting image bigger Precision Aerobatics machines author feels may too far away seeing 1/2A stunters competitive larger aircraft II II 1/64 OR 1/32 tLYQOQ1S1ERI FORMER POSITIONSIIREMOVE THIS AREABUILT IF WING ON 2 INBOARD RIBS-INBOARD RIB TEMPLATE -FOAM CORE BUILT-UP WINOTIP PATTERN TIP RIB TEJLATE FOAM CORE ROOT PATTEIRI FOAM WINO WITH 1/32 SlEET AVALABLE FROM CONTROL SPECIALTIES CO 3/32 00 BRASS TUBINGI i-~-~ 111Ir - II Iii 3/32 SHEET RIBS 0LI2 VECO BELLCRAHE IIII- II zz FLEXIBLE /2 LEAD OUTS______________ ---7LiiIjt NYLON HINGE C L GE VECO MORN 4 F i II II F2 II I 3-40 SUNG NGTS810 IrE 8 45 Rim 4 POSITIONSFOR LO MOUNTS 1/8 SlEET WEB I/IS DIA MW LG STRUT LASH L 0 STRUT ON MOUNT WITH SOFT WIRE 3/SB 3/5 MAPLE MOTOR MOUNTS I/IS PLY LO MOUNT 2 NEOD I/IS PLY BELLCRANK MOUNT -~IIIl zJL-yrilI P BALSA FILLETS Z2Z 3/ISH 1/4 TE7 3/IS SHEET FLAPS 3/4 U 1/2 BLOCK \PAINTED CANOPY OUTLINE DA ACE SPNNERS/S SHEETI/IS DIA MWI PUSHNODS flT\ IIRJI ---~-11111 IT FOR3/32 SHEET FORMERS S SASS WOOD COWLI DIA WHEELS TANK FROM OOS BRASS AND 3/32 00- TUBING7 FUEL PICK-UP FILLER/VENT III OVERFLOW PLUS P05 P110gm UNIFLOW TANK DETAIL DIA WHEEL SMALL VECO HORN 3A6 SHEET II ___________________________________ 7 --1/4 SHEET HORIZONTAL TAILNYLON HINGE C L I/SOFFSET2345 TERCEL /2 STUNT 75510 SPAN33 IN AREA210 SO IN DESIGPIED BY KEITH TROSTLE CUT 3/32 SHEET FUSELAGE SIDES SLIGHTLY OVERSIZE FOR CURVAmBE 3/IS SHEET FIN 0 0 CD 0 0 Tercel Right Rear quarter view illustrated relationship control surfaces Original ship weigha 10-1/2 oz12 oz lathe maximum desirable warp weight will equivalent built-up wing shown plans built-up wing original using care fully selected wood weighed just less 3 oz complete tips flaps controls landing gear foam wing cores weigh less 2 oz before assembly wing Minimum weight important model size power available wing area considerably less full-size competition stunt model must offset much lighter wing load ing favorable power-to-weight ratio original Tercel weighs 10 ounces Twelve ounces should maxi mum weight allow constructing finishing model obtain foam wings follow instructions provided bellcrank instal lation wing assembly construct built-up wing sandwich 10 pieces 3/32 sheet balsa between root tip rib patterns shape ribs left right wing panels Assemble ribs spars leading trailing edges over plans ensuring no warps built wing Shape trailing edge add 1/32 trailing edge sheets Install bellcrank bellcrank mount pushrod leadouts add flaps Lash landing gear struts landing gear mounts soft wire install assembly third fourth ribs i/i balsa web landing gear mount top spar recommended Sheet leading edge center section Add tips shape leading edge tips Cut shape horizontal tail parts Add horn assemble elevators stabilizer Assemble nose unit consisting doublers motor mounts tank first two formers unit epoxy Epoxy unit wing making sure proper alignment thrust line maintained Assemble fuselage sides formers nose/wing assembly making sure fuselage straight Add horizontal tail assembly checking zero incidence wing main tained Add tail wheel strut top bottom fuselage blocks fillets fin Shape sand fuselage desired cioss section cowl carved piece basswood hard balsa Finish original kept minimum reduce weight Two coats Sig clear Lite Coat brushed entire structure sanded wings flaps covered Japanese tis sue given 4 coats thinned clear dope Several coats sanding sealer brushed fuselage flaps tail sanding between coat until grain began disappear Two coats color sprayed trim added continued page 79 September 1976 31 Above Foam wings optional com mercially availablesee text come 1/32 skinning Built-up bare wing weighs less 3 oz foam 2 oz before assembly Nothing like job well done Cox TO 6 x 3 Cox gray prop used mild fuel Lines 008 stranded up 62 ft long FF Champs/Meuser continued page 8 June issue Model Builder flew beautifully Mather Warner tried level best lose Peanut Scale mcdels thermals Warner put up least flight around five mm Other names such Cover Moss Mulligan promi nent winners lists three scale events also wonder leg being pulled see M Mulligan top list Indoor Peanut Next theyll trying tell Mister Mulligan flying peanut-scale model Bill Warner Night Flying event routine contests arranged Southerncali forniacs might seem bit strange used conventional after-sun down pursuits frequently make seem easy chemical light semi-haywire arrangement batteries wires lamp bulb taped rubber-banded onto fuselage con ventional Gas model usually large B C-class model gasoline lanternor per haps snazzier cordless electrics raises local environment slightly above threshold visibility flier rest conventional competition free flight chaser timer best can said chances contracting sunstroke extremely small Xenakis kids hooked chem light hand-launch glider worked out reasonably well should pardon expressiona radio controlled Old-Timer model out try ing its thing under worst cir cumstances Maybe could hold entire Nats night quiet meet change No blaring radios few motorcyclists demon strated cleverness making noise kicking up dust nobody got Hot Stuff eyes severe lacerations prop nobody sank gurgling quick sand ponds surrounding local kittylitter works scarcely anybody reported loved being eaten rattlesnake Actually sort dull such extra curricular aspects cant win em all. RO KWIK- FILL FUEL PUMP 4c- EI Du NEW CONCEPT IN FUEL PUMPS ONE MOVING PART NOTHING TO BREAK OR WEAR OUT ONLY $1A95 IL No191 iIiUrn LIGHT COMPACT AND RUGGED PUMP IS ONLY 2 WIDE AND 2-7/8 IN DIAMETER HAND OPERATED AND REVERSIBLE PUMPS IN AND OUT HIGH VOLUME FLOW ATTRACTIVE BLACK PUMP COMES ASSEMBLED AND MOUNTS ON GALLON CANS QUICK EASY INSTALLA TION PUMP COMES COMPLETE WITH STEEL MOUNTING BRACKETS HARDWARE AND FUEL TUBING DU-BRO PRODUCTS INCORPORATED 480 Banner Road Wauconda Illinois 60084 TANK FILTER Combination weight filter Designed fit clunk tanks Made sintered bronze give ultimate filtering No 16198c Tercel/Trostle continued page 31 little work small penalty weight models can made look good full-scale stunters tank shown large enough give engine run well over 8 mm may desire make tank rter keep engine run within 8-mm limit have measure fuel flying competition uniflow tank shown plans has given very satisfac tory performance flap/elevator movement ori ginal model first set up one-toone ratio During flight testing large flaps appeared create excessive drag during maneuvers flap/elevator movement changed two-tothree ratio shown plans works better flaps smaller deflec tions appear increase lift sufficiently square corners building up ex cessive drag original Tercel con structed adjustable elevator horn using Du-Bro Swiv-Link has worked satisfactorily after flights have found adjustable flap/eleva tor ratio elevator trim capability allows adjustments fine tuning can im prove flying characteristics stunt model balance point should further aft position shown plans model very sensitive balance point Ifyou arewantingto useyourmodel trainer learn stunt pattern funda mentals forward CG location recommended leadout positions shown plans satisfactory wind conditions would want fly though might want use some method adjust leadout positions have used Cox handle recom mend line spacing handle 1 less experi enced fliers line spacing 11/4 1 recommended Cox TD en gine 6-3 Cox gray prop running September 1976 79 kill FUEL TUBING Quality tubing Fuels High heat FEET specifically com pounded Gb resistant noncollapsible No 162 9cL Tercel continued mild fuel 10% nitro less 0008 diameter stranded lines up 52 ft can used cables available Sig Pylon cannot obtain lines dealer X-Cell Models Inc 347 Eastland Shopping Center Lexington KY 40505 can contacted prices availability Flying models new experience have booming horsepower larger competition models line tension considerably less However ro tational speed 45- 50-ft lines about same larger models Tercel can useful tool sharpen re conditions fuels exact ignition specifications particular glow plug Its easy-toread 0-10 amp ammeter shows precise power output will tell glance plug good engine flooded self-contained 2 volt battery may recharged over 150 times has fully charged rating 5 ampere hours peak power 200 watts circuitry safety fused 2 diameter highimpact polypropylene case has fluted base convenient han dling have add lead wires plug connector choice color-coded labeled terminals Buy GloBee Fire Plug hobby dealer today oy years fast reliable engine starts perfectly matched special requirements flexes its response very quick have yet looked up Ter cel male hawk particular pere grine falcon interested Control Line Precision Aerobatics want keep formed latest happenings competition scene should consider joining Precision Aerobatics Model Pilots Association dedicated promotion CL Precision Aerobatics Annual dues membership cludes monthly newsletter $600 care Wynn Paul 1630 Maywick Dr Lexington KY 40504 address Keith Trostle 10900 Phillips Dr Upper Marlboro MD 20870 DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 RC Scale/Atkinson continued page 26 Using good pair gloves place butyrate sheet about 4 heating element slowly move back forth until plastic becomes pliable starts sag also should start smoke Im mediately remove heat lay over plug vise carefully center ing same time very firmly pull straight down over plug must done very quickly plastic will cool quickly around outer edges will distort form plug Hold several minutes cool let set about 10 mm until completely cooled Remove trim suit rea son canopy does come out right may reheat plastic sheet will slowly resume its original shape Its im portant its hot enough care should taken get too hot because canopy will distort clear may want try sample run before form ing canopy Trimming may painted use trim tape prepainted masking tape cut small strips three pictures show steps complete canopy items may formed manner such gun turrets gun bubbles lights etc time writing have just re turned 4th Annual Mint Julep R/C Meet Rough River Park Ken tucky has finest scale meets country Facilities superb Setting rolling hills north cen tral Kentucky lovely park lake facilities about 2500 ft black-top runway fly state Kentuckys Park Dept co-sponsor contest novelty itself certainly need help cooperation such parks governing bodies Kentucky Park Commission highly commended fine help further interest RC sport hobby flaw meet poor cooperation weather man rained off both Saturday Sun day Still flyable weather although wind little across runway Im afraid heavy rain cold weather Friday night may have kept some contest ants attending Although quan tity down quality evident both static flying attend ance three multi-engine stand-offs two Aerocommanders B-25 variety aircraft truly made up lower number scale models seen past years interesting innovations static turntable slowly rotated give judges really good look model table about 4 ft diameter stood about 2 ft ground gave judges chance see undercarriage plainly well underbelly model table could turned slowly use electric drill large dowel running turn 80 Model Aviation Fire Plug. optimum starting power need power source youll need years glow plug lights new GloBee Fire Plug GloBee Fire Plug igniterits completely inte grated glow plug starting system Its easy-to-operate rheostat con trol lever provides optimum current match weather I
Edition: Model Aviation - 1976/09
Page Numbers: 28, 29, 30, 31, 79, 80
rhj Keith Trostle THE POPULARITY power various types models growing Per haps reasons trend increasing price materials used hobby particularly balsa engines fuel Initial investment build keep /2A model flying considerably less larger counterparts Cox TD lists less $2000 proper care will give hours trouble-free operation hours flying time will use considerably less fuel too have ventured using Y2A power models others speed free flight events have received bonus surprise performance models demonstrate Reference made several glowing articles published last two years RC pattern ships fast growing Y2A RC pylon events Interest Precision Aerobatics stunt similarly growing across country interest has further kindled unofficial stunt events sponsored Cox last three Nit tionals Precision Aerobatic Model Pilots Association PAMPA assisted Cox running unofficial events year people have participated larger numbers saying will compete next year standardize event recent 76 Nats special PAMPA committee formed draw up set rules meant easily understood relatively non-restrictive keep event could compete enjoy Arlie Preszler chairman committee has considerable ex perience flying /2A stunt contests North ern California Arlie also volunteered capable services 76 Nats stunt Event Director contributions appreciated participate event rules used 76 Nats endorsed PAMPA used guidelines local level competition Re finements following guidelines will made necessary published monthly PAMPA publication Stunt News experience gained PRECISION AEROBATICS Engine displacement 051 cu maxi mum Builder-of-the-model No requirement Entries entry per pilot pilot per airplane Back-up model per AMA rules allowed Appearance points None Lines pull test 008 diameter 5 lbs Pattern Per AMA rule book CL Pre cision Aerobatics Attempts Per AMA rule book CL Precision Aerobatics Identification Per AMA rule book CL Precision Aerobatics igh num bers permissible Competition results far have indi cated /2A stunt pleasant diversion Precision Aerobatics event pressure competition present stunt compared Precision Aerobatics certainly low key event can used introduction Precision Aerobatics minimum vestment time still gaining beneficial experience discipline necessary competitive Precision Aero batics models just plain fun build fly After seeing fully built-up Y2A stunt model during 1975 Winston-Salem Southeastern Championships wanted try own After reviewing files several Y2A stunt models found have published over last sev eral years include Ed Hunts Envoy Model Airplane News August 1964 Dick Mathis Pinto Flying Models December 1972 recently Tom Dixons Gremlin Model Builder May 1975 Also Larry Renger has several articles Flying Models about use foam-sheet wings available Cox used Cox Super Stunters felt improvements could made incorporating use larger flaps larger horizontal tail thicker airfoil what seen previous /2A designs relatively larger flaps tail used Tercel inspired Genesis/Scorpio/Stunt Machine full-size Precision Aerobatic designs Bob Hunt Bill Simons Gene Schaffer New Jersey/New York area models capable pilots flying some better patterns country square maneuvers among best will see turning ability Tercel 28 Model Aviation Cowl fits snugly around cylinder Cox QRC TO Note plumbing Uniflow tankas shown planwill give a-mm plus run Right Winner unofficial 1/2A Stunt event 75 Nats Tercel utilizes larger flaps bigger stabilizer 20%-thick blunt edged wing cowl removed show close fit engine full power TD used larger model possiblesuch 240 250 sq wing span 36 37 has certainly confirmed approach strongly believe thick blunt airfoils Precision Aerobatics airfoil shown design 20% thick including flaps similar Bart Klapinskis 1967 Nats winning Tempest quite popular West Coast size wing determined approximate average existing stunt designs lack vertical tail may appeal some concept taken trend seen East Coast attempt improve impression turning sharper corners keeping straight fuselage low profile use vertical tail Tercel may improve handling characteristics vertical maneuvers recommended feel appearance model would enhanced model shown plans easily adaptable profile type fuselage piece carefully selected t balsa 1/32 plywood doublers recom mended aft fuselage width should tapered just forward flap hinge line no 3/16 stabilizer hinge line reduce weight much possible No claim made ulti mate stunt design will prob ably never see such model feel design presented offers some ad vancement over previous models Its performance can termed satisfac tory demonstrated its win 75 Nats unofficial event performance stunt models particularly wind cannot yet compare curRight Access hole reveals use threaded ad justment horn attachment may wish try Below Front enddoublers mounts tank two bulkheadsattach unit wing Sides formers attach wing/nose unit rent 35- 46-powered Precision Aero batics designs time improvements may made will see Preci sion Aerobatic models competitive larger models may too far away now under certain condi tions much learned yet optimum size stunt Tercel can flown CoxQRC 049 Using full power available Cox TD larger model could considered much larger performance would enhanced known 240 250 sq wing 36 37 span feasible weight must kept absolute minimum Probably some improvement could realized after some experimenta tion airfoil sections 22% thick sec tion could considered section simi lar Al Rabe uses Mustunt American Modeler February 1973 successful super semi-scale stunters should explored own design phi losophies can experimented proven disproven considerably easier cheaper quicker models larger models Excellent cored foam wings 1/32 balsa sheeting available de sign Control Specialties Co 205 Wood Ave PO Box 268 Middlesex NJ 08846 Telephone ac 201 469-1663 Call write price availability Use foam wings recommended shortens construction time wing will September 1976 29 interest Half-A Stunt growing leaps bounds exceptional design well-known expert guarantees can fly acceptable pattern Above Tercel spitting image bigger Precision Aerobatics machines author feels may too far away seeing 1/2A stunters competitive larger aircraft II II 1/64 OR 1/32 tLYQOQ1S1ERI FORMER POSITIONSIIREMOVE THIS AREABUILT IF WING ON 2 INBOARD RIBS-INBOARD RIB TEMPLATE -FOAM CORE BUILT-UP WINOTIP PATTERN TIP RIB TEJLATE FOAM CORE ROOT PATTEIRI FOAM WINO WITH 1/32 SlEET AVALABLE FROM CONTROL SPECIALTIES CO 3/32 00 BRASS TUBINGI i-~-~ 111Ir - II Iii 3/32 SHEET RIBS 0LI2 VECO BELLCRAHE IIII- II zz FLEXIBLE /2 LEAD OUTS______________ ---7LiiIjt NYLON HINGE C L GE VECO MORN 4 F i II II F2 II I 3-40 SUNG NGTS810 IrE 8 45 Rim 4 POSITIONSFOR LO MOUNTS 1/8 SlEET WEB I/IS DIA MW LG STRUT LASH L 0 STRUT ON MOUNT WITH SOFT WIRE 3/SB 3/5 MAPLE MOTOR MOUNTS I/IS PLY LO MOUNT 2 NEOD I/IS PLY BELLCRANK MOUNT -~IIIl zJL-yrilI P BALSA FILLETS Z2Z 3/ISH 1/4 TE7 3/IS SHEET FLAPS 3/4 U 1/2 BLOCK \PAINTED CANOPY OUTLINE DA ACE SPNNERS/S SHEETI/IS DIA MWI PUSHNODS flT\ IIRJI ---~-11111 IT FOR3/32 SHEET FORMERS S SASS WOOD COWLI DIA WHEELS TANK FROM OOS BRASS AND 3/32 00- TUBING7 FUEL PICK-UP FILLER/VENT III OVERFLOW PLUS P05 P110gm UNIFLOW TANK DETAIL DIA WHEEL SMALL VECO HORN 3A6 SHEET II ___________________________________ 7 --1/4 SHEET HORIZONTAL TAILNYLON HINGE C L I/SOFFSET2345 TERCEL /2 STUNT 75510 SPAN33 IN AREA210 SO IN DESIGPIED BY KEITH TROSTLE CUT 3/32 SHEET FUSELAGE SIDES SLIGHTLY OVERSIZE FOR CURVAmBE 3/IS SHEET FIN 0 0 CD 0 0 Tercel Right Rear quarter view illustrated relationship control surfaces Original ship weigha 10-1/2 oz12 oz lathe maximum desirable warp weight will equivalent built-up wing shown plans built-up wing original using care fully selected wood weighed just less 3 oz complete tips flaps controls landing gear foam wing cores weigh less 2 oz before assembly wing Minimum weight important model size power available wing area considerably less full-size competition stunt model must offset much lighter wing load ing favorable power-to-weight ratio original Tercel weighs 10 ounces Twelve ounces should maxi mum weight allow constructing finishing model obtain foam wings follow instructions provided bellcrank instal lation wing assembly construct built-up wing sandwich 10 pieces 3/32 sheet balsa between root tip rib patterns shape ribs left right wing panels Assemble ribs spars leading trailing edges over plans ensuring no warps built wing Shape trailing edge add 1/32 trailing edge sheets Install bellcrank bellcrank mount pushrod leadouts add flaps Lash landing gear struts landing gear mounts soft wire install assembly third fourth ribs i/i balsa web landing gear mount top spar recommended Sheet leading edge center section Add tips shape leading edge tips Cut shape horizontal tail parts Add horn assemble elevators stabilizer Assemble nose unit consisting doublers motor mounts tank first two formers unit epoxy Epoxy unit wing making sure proper alignment thrust line maintained Assemble fuselage sides formers nose/wing assembly making sure fuselage straight Add horizontal tail assembly checking zero incidence wing main tained Add tail wheel strut top bottom fuselage blocks fillets fin Shape sand fuselage desired cioss section cowl carved piece basswood hard balsa Finish original kept minimum reduce weight Two coats Sig clear Lite Coat brushed entire structure sanded wings flaps covered Japanese tis sue given 4 coats thinned clear dope Several coats sanding sealer brushed fuselage flaps tail sanding between coat until grain began disappear Two coats color sprayed trim added continued page 79 September 1976 31 Above Foam wings optional com mercially availablesee text come 1/32 skinning Built-up bare wing weighs less 3 oz foam 2 oz before assembly Nothing like job well done Cox TO 6 x 3 Cox gray prop used mild fuel Lines 008 stranded up 62 ft long FF Champs/Meuser continued page 8 June issue Model Builder flew beautifully Mather Warner tried level best lose Peanut Scale mcdels thermals Warner put up least flight around five mm Other names such Cover Moss Mulligan promi nent winners lists three scale events also wonder leg being pulled see M Mulligan top list Indoor Peanut Next theyll trying tell Mister Mulligan flying peanut-scale model Bill Warner Night Flying event routine contests arranged Southerncali forniacs might seem bit strange used conventional after-sun down pursuits frequently make seem easy chemical light semi-haywire arrangement batteries wires lamp bulb taped rubber-banded onto fuselage con ventional Gas model usually large B C-class model gasoline lanternor per haps snazzier cordless electrics raises local environment slightly above threshold visibility flier rest conventional competition free flight chaser timer best can said chances contracting sunstroke extremely small Xenakis kids hooked chem light hand-launch glider worked out reasonably well should pardon expressiona radio controlled Old-Timer model out try ing its thing under worst cir cumstances Maybe could hold entire Nats night quiet meet change No blaring radios few motorcyclists demon strated cleverness making noise kicking up dust nobody got Hot Stuff eyes severe lacerations prop nobody sank gurgling quick sand ponds surrounding local kittylitter works scarcely anybody reported loved being eaten rattlesnake Actually sort dull such extra curricular aspects cant win em all. RO KWIK- FILL FUEL PUMP 4c- EI Du NEW CONCEPT IN FUEL PUMPS ONE MOVING PART NOTHING TO BREAK OR WEAR OUT ONLY $1A95 IL No191 iIiUrn LIGHT COMPACT AND RUGGED PUMP IS ONLY 2 WIDE AND 2-7/8 IN DIAMETER HAND OPERATED AND REVERSIBLE PUMPS IN AND OUT HIGH VOLUME FLOW ATTRACTIVE BLACK PUMP COMES ASSEMBLED AND MOUNTS ON GALLON CANS QUICK EASY INSTALLA TION PUMP COMES COMPLETE WITH STEEL MOUNTING BRACKETS HARDWARE AND FUEL TUBING DU-BRO PRODUCTS INCORPORATED 480 Banner Road Wauconda Illinois 60084 TANK FILTER Combination weight filter Designed fit clunk tanks Made sintered bronze give ultimate filtering No 16198c Tercel/Trostle continued page 31 little work small penalty weight models can made look good full-scale stunters tank shown large enough give engine run well over 8 mm may desire make tank rter keep engine run within 8-mm limit have measure fuel flying competition uniflow tank shown plans has given very satisfac tory performance flap/elevator movement ori ginal model first set up one-toone ratio During flight testing large flaps appeared create excessive drag during maneuvers flap/elevator movement changed two-tothree ratio shown plans works better flaps smaller deflec tions appear increase lift sufficiently square corners building up ex cessive drag original Tercel con structed adjustable elevator horn using Du-Bro Swiv-Link has worked satisfactorily after flights have found adjustable flap/eleva tor ratio elevator trim capability allows adjustments fine tuning can im prove flying characteristics stunt model balance point should further aft position shown plans model very sensitive balance point Ifyou arewantingto useyourmodel trainer learn stunt pattern funda mentals forward CG location recommended leadout positions shown plans satisfactory wind conditions would want fly though might want use some method adjust leadout positions have used Cox handle recom mend line spacing handle 1 less experi enced fliers line spacing 11/4 1 recommended Cox TD en gine 6-3 Cox gray prop running September 1976 79 kill FUEL TUBING Quality tubing Fuels High heat FEET specifically com pounded Gb resistant noncollapsible No 162 9cL Tercel continued mild fuel 10% nitro less 0008 diameter stranded lines up 52 ft can used cables available Sig Pylon cannot obtain lines dealer X-Cell Models Inc 347 Eastland Shopping Center Lexington KY 40505 can contacted prices availability Flying models new experience have booming horsepower larger competition models line tension considerably less However ro tational speed 45- 50-ft lines about same larger models Tercel can useful tool sharpen re conditions fuels exact ignition specifications particular glow plug Its easy-toread 0-10 amp ammeter shows precise power output will tell glance plug good engine flooded self-contained 2 volt battery may recharged over 150 times has fully charged rating 5 ampere hours peak power 200 watts circuitry safety fused 2 diameter highimpact polypropylene case has fluted base convenient han dling have add lead wires plug connector choice color-coded labeled terminals Buy GloBee Fire Plug hobby dealer today oy years fast reliable engine starts perfectly matched special requirements flexes its response very quick have yet looked up Ter cel male hawk particular pere grine falcon interested Control Line Precision Aerobatics want keep formed latest happenings competition scene should consider joining Precision Aerobatics Model Pilots Association dedicated promotion CL Precision Aerobatics Annual dues membership cludes monthly newsletter $600 care Wynn Paul 1630 Maywick Dr Lexington KY 40504 address Keith Trostle 10900 Phillips Dr Upper Marlboro MD 20870 DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 RC Scale/Atkinson continued page 26 Using good pair gloves place butyrate sheet about 4 heating element slowly move back forth until plastic becomes pliable starts sag also should start smoke Im mediately remove heat lay over plug vise carefully center ing same time very firmly pull straight down over plug must done very quickly plastic will cool quickly around outer edges will distort form plug Hold several minutes cool let set about 10 mm until completely cooled Remove trim suit rea son canopy does come out right may reheat plastic sheet will slowly resume its original shape Its im portant its hot enough care should taken get too hot because canopy will distort clear may want try sample run before form ing canopy Trimming may painted use trim tape prepainted masking tape cut small strips three pictures show steps complete canopy items may formed manner such gun turrets gun bubbles lights etc time writing have just re turned 4th Annual Mint Julep R/C Meet Rough River Park Ken tucky has finest scale meets country Facilities superb Setting rolling hills north cen tral Kentucky lovely park lake facilities about 2500 ft black-top runway fly state Kentuckys Park Dept co-sponsor contest novelty itself certainly need help cooperation such parks governing bodies Kentucky Park Commission highly commended fine help further interest RC sport hobby flaw meet poor cooperation weather man rained off both Saturday Sun day Still flyable weather although wind little across runway Im afraid heavy rain cold weather Friday night may have kept some contest ants attending Although quan tity down quality evident both static flying attend ance three multi-engine stand-offs two Aerocommanders B-25 variety aircraft truly made up lower number scale models seen past years interesting innovations static turntable slowly rotated give judges really good look model table about 4 ft diameter stood about 2 ft ground gave judges chance see undercarriage plainly well underbelly model table could turned slowly use electric drill large dowel running turn 80 Model Aviation Fire Plug. optimum starting power need power source youll need years glow plug lights new GloBee Fire Plug GloBee Fire Plug igniterits completely inte grated glow plug starting system Its easy-to-operate rheostat con trol lever provides optimum current match weather I
Edition: Model Aviation - 1976/09
Page Numbers: 28, 29, 30, 31, 79, 80
rhj Keith Trostle THE POPULARITY power various types models growing Per haps reasons trend increasing price materials used hobby particularly balsa engines fuel Initial investment build keep /2A model flying considerably less larger counterparts Cox TD lists less $2000 proper care will give hours trouble-free operation hours flying time will use considerably less fuel too have ventured using Y2A power models others speed free flight events have received bonus surprise performance models demonstrate Reference made several glowing articles published last two years RC pattern ships fast growing Y2A RC pylon events Interest Precision Aerobatics stunt similarly growing across country interest has further kindled unofficial stunt events sponsored Cox last three Nit tionals Precision Aerobatic Model Pilots Association PAMPA assisted Cox running unofficial events year people have participated larger numbers saying will compete next year standardize event recent 76 Nats special PAMPA committee formed draw up set rules meant easily understood relatively non-restrictive keep event could compete enjoy Arlie Preszler chairman committee has considerable ex perience flying /2A stunt contests North ern California Arlie also volunteered capable services 76 Nats stunt Event Director contributions appreciated participate event rules used 76 Nats endorsed PAMPA used guidelines local level competition Re finements following guidelines will made necessary published monthly PAMPA publication Stunt News experience gained PRECISION AEROBATICS Engine displacement 051 cu maxi mum Builder-of-the-model No requirement Entries entry per pilot pilot per airplane Back-up model per AMA rules allowed Appearance points None Lines pull test 008 diameter 5 lbs Pattern Per AMA rule book CL Pre cision Aerobatics Attempts Per AMA rule book CL Precision Aerobatics Identification Per AMA rule book CL Precision Aerobatics igh num bers permissible Competition results far have indi cated /2A stunt pleasant diversion Precision Aerobatics event pressure competition present stunt compared Precision Aerobatics certainly low key event can used introduction Precision Aerobatics minimum vestment time still gaining beneficial experience discipline necessary competitive Precision Aero batics models just plain fun build fly After seeing fully built-up Y2A stunt model during 1975 Winston-Salem Southeastern Championships wanted try own After reviewing files several Y2A stunt models found have published over last sev eral years include Ed Hunts Envoy Model Airplane News August 1964 Dick Mathis Pinto Flying Models December 1972 recently Tom Dixons Gremlin Model Builder May 1975 Also Larry Renger has several articles Flying Models about use foam-sheet wings available Cox used Cox Super Stunters felt improvements could made incorporating use larger flaps larger horizontal tail thicker airfoil what seen previous /2A designs relatively larger flaps tail used Tercel inspired Genesis/Scorpio/Stunt Machine full-size Precision Aerobatic designs Bob Hunt Bill Simons Gene Schaffer New Jersey/New York area models capable pilots flying some better patterns country square maneuvers among best will see turning ability Tercel 28 Model Aviation Cowl fits snugly around cylinder Cox QRC TO Note plumbing Uniflow tankas shown planwill give a-mm plus run Right Winner unofficial 1/2A Stunt event 75 Nats Tercel utilizes larger flaps bigger stabilizer 20%-thick blunt edged wing cowl removed show close fit engine full power TD used larger model possiblesuch 240 250 sq wing span 36 37 has certainly confirmed approach strongly believe thick blunt airfoils Precision Aerobatics airfoil shown design 20% thick including flaps similar Bart Klapinskis 1967 Nats winning Tempest quite popular West Coast size wing determined approximate average existing stunt designs lack vertical tail may appeal some concept taken trend seen East Coast attempt improve impression turning sharper corners keeping straight fuselage low profile use vertical tail Tercel may improve handling characteristics vertical maneuvers recommended feel appearance model would enhanced model shown plans easily adaptable profile type fuselage piece carefully selected t balsa 1/32 plywood doublers recom mended aft fuselage width should tapered just forward flap hinge line no 3/16 stabilizer hinge line reduce weight much possible No claim made ulti mate stunt design will prob ably never see such model feel design presented offers some ad vancement over previous models Its performance can termed satisfac tory demonstrated its win 75 Nats unofficial event performance stunt models particularly wind cannot yet compare curRight Access hole reveals use threaded ad justment horn attachment may wish try Below Front enddoublers mounts tank two bulkheadsattach unit wing Sides formers attach wing/nose unit rent 35- 46-powered Precision Aero batics designs time improvements may made will see Preci sion Aerobatic models competitive larger models may too far away now under certain condi tions much learned yet optimum size stunt Tercel can flown CoxQRC 049 Using full power available Cox TD larger model could considered much larger performance would enhanced known 240 250 sq wing 36 37 span feasible weight must kept absolute minimum Probably some improvement could realized after some experimenta tion airfoil sections 22% thick sec tion could considered section simi lar Al Rabe uses Mustunt American Modeler February 1973 successful super semi-scale stunters should explored own design phi losophies can experimented proven disproven considerably easier cheaper quicker models larger models Excellent cored foam wings 1/32 balsa sheeting available de sign Control Specialties Co 205 Wood Ave PO Box 268 Middlesex NJ 08846 Telephone ac 201 469-1663 Call write price availability Use foam wings recommended shortens construction time wing will September 1976 29 interest Half-A Stunt growing leaps bounds exceptional design well-known expert guarantees can fly acceptable pattern Above Tercel spitting image bigger Precision Aerobatics machines author feels may too far away seeing 1/2A stunters competitive larger aircraft II II 1/64 OR 1/32 tLYQOQ1S1ERI FORMER POSITIONSIIREMOVE THIS AREABUILT IF WING ON 2 INBOARD RIBS-INBOARD RIB TEMPLATE -FOAM CORE BUILT-UP WINOTIP PATTERN TIP RIB TEJLATE FOAM CORE ROOT PATTEIRI FOAM WINO WITH 1/32 SlEET AVALABLE FROM CONTROL SPECIALTIES CO 3/32 00 BRASS TUBINGI i-~-~ 111Ir - II Iii 3/32 SHEET RIBS 0LI2 VECO BELLCRAHE IIII- II zz FLEXIBLE /2 LEAD OUTS______________ ---7LiiIjt NYLON HINGE C L GE VECO MORN 4 F i II II F2 II I 3-40 SUNG NGTS810 IrE 8 45 Rim 4 POSITIONSFOR LO MOUNTS 1/8 SlEET WEB I/IS DIA MW LG STRUT LASH L 0 STRUT ON MOUNT WITH SOFT WIRE 3/SB 3/5 MAPLE MOTOR MOUNTS I/IS PLY LO MOUNT 2 NEOD I/IS PLY BELLCRANK MOUNT -~IIIl zJL-yrilI P BALSA FILLETS Z2Z 3/ISH 1/4 TE7 3/IS SHEET FLAPS 3/4 U 1/2 BLOCK \PAINTED CANOPY OUTLINE DA ACE SPNNERS/S SHEETI/IS DIA MWI PUSHNODS flT\ IIRJI ---~-11111 IT FOR3/32 SHEET FORMERS S SASS WOOD COWLI DIA WHEELS TANK FROM OOS BRASS AND 3/32 00- TUBING7 FUEL PICK-UP FILLER/VENT III OVERFLOW PLUS P05 P110gm UNIFLOW TANK DETAIL DIA WHEEL SMALL VECO HORN 3A6 SHEET II ___________________________________ 7 --1/4 SHEET HORIZONTAL TAILNYLON HINGE C L I/SOFFSET2345 TERCEL /2 STUNT 75510 SPAN33 IN AREA210 SO IN DESIGPIED BY KEITH TROSTLE CUT 3/32 SHEET FUSELAGE SIDES SLIGHTLY OVERSIZE FOR CURVAmBE 3/IS SHEET FIN 0 0 CD 0 0 Tercel Right Rear quarter view illustrated relationship control surfaces Original ship weigha 10-1/2 oz12 oz lathe maximum desirable warp weight will equivalent built-up wing shown plans built-up wing original using care fully selected wood weighed just less 3 oz complete tips flaps controls landing gear foam wing cores weigh less 2 oz before assembly wing Minimum weight important model size power available wing area considerably less full-size competition stunt model must offset much lighter wing load ing favorable power-to-weight ratio original Tercel weighs 10 ounces Twelve ounces should maxi mum weight allow constructing finishing model obtain foam wings follow instructions provided bellcrank instal lation wing assembly construct built-up wing sandwich 10 pieces 3/32 sheet balsa between root tip rib patterns shape ribs left right wing panels Assemble ribs spars leading trailing edges over plans ensuring no warps built wing Shape trailing edge add 1/32 trailing edge sheets Install bellcrank bellcrank mount pushrod leadouts add flaps Lash landing gear struts landing gear mounts soft wire install assembly third fourth ribs i/i balsa web landing gear mount top spar recommended Sheet leading edge center section Add tips shape leading edge tips Cut shape horizontal tail parts Add horn assemble elevators stabilizer Assemble nose unit consisting doublers motor mounts tank first two formers unit epoxy Epoxy unit wing making sure proper alignment thrust line maintained Assemble fuselage sides formers nose/wing assembly making sure fuselage straight Add horizontal tail assembly checking zero incidence wing main tained Add tail wheel strut top bottom fuselage blocks fillets fin Shape sand fuselage desired cioss section cowl carved piece basswood hard balsa Finish original kept minimum reduce weight Two coats Sig clear Lite Coat brushed entire structure sanded wings flaps covered Japanese tis sue given 4 coats thinned clear dope Several coats sanding sealer brushed fuselage flaps tail sanding between coat until grain began disappear Two coats color sprayed trim added continued page 79 September 1976 31 Above Foam wings optional com mercially availablesee text come 1/32 skinning Built-up bare wing weighs less 3 oz foam 2 oz before assembly Nothing like job well done Cox TO 6 x 3 Cox gray prop used mild fuel Lines 008 stranded up 62 ft long FF Champs/Meuser continued page 8 June issue Model Builder flew beautifully Mather Warner tried level best lose Peanut Scale mcdels thermals Warner put up least flight around five mm Other names such Cover Moss Mulligan promi nent winners lists three scale events also wonder leg being pulled see M Mulligan top list Indoor Peanut Next theyll trying tell Mister Mulligan flying peanut-scale model Bill Warner Night Flying event routine contests arranged Southerncali forniacs might seem bit strange used conventional after-sun down pursuits frequently make seem easy chemical light semi-haywire arrangement batteries wires lamp bulb taped rubber-banded onto fuselage con ventional Gas model usually large B C-class model gasoline lanternor per haps snazzier cordless electrics raises local environment slightly above threshold visibility flier rest conventional competition free flight chaser timer best can said chances contracting sunstroke extremely small Xenakis kids hooked chem light hand-launch glider worked out reasonably well should pardon expressiona radio controlled Old-Timer model out try ing its thing under worst cir cumstances Maybe could hold entire Nats night quiet meet change No blaring radios few motorcyclists demon strated cleverness making noise kicking up dust nobody got Hot Stuff eyes severe lacerations prop nobody sank gurgling quick sand ponds surrounding local kittylitter works scarcely anybody reported loved being eaten rattlesnake Actually sort dull such extra curricular aspects cant win em all. RO KWIK- FILL FUEL PUMP 4c- EI Du NEW CONCEPT IN FUEL PUMPS ONE MOVING PART NOTHING TO BREAK OR WEAR OUT ONLY $1A95 IL No191 iIiUrn LIGHT COMPACT AND RUGGED PUMP IS ONLY 2 WIDE AND 2-7/8 IN DIAMETER HAND OPERATED AND REVERSIBLE PUMPS IN AND OUT HIGH VOLUME FLOW ATTRACTIVE BLACK PUMP COMES ASSEMBLED AND MOUNTS ON GALLON CANS QUICK EASY INSTALLA TION PUMP COMES COMPLETE WITH STEEL MOUNTING BRACKETS HARDWARE AND FUEL TUBING DU-BRO PRODUCTS INCORPORATED 480 Banner Road Wauconda Illinois 60084 TANK FILTER Combination weight filter Designed fit clunk tanks Made sintered bronze give ultimate filtering No 16198c Tercel/Trostle continued page 31 little work small penalty weight models can made look good full-scale stunters tank shown large enough give engine run well over 8 mm may desire make tank rter keep engine run within 8-mm limit have measure fuel flying competition uniflow tank shown plans has given very satisfac tory performance flap/elevator movement ori ginal model first set up one-toone ratio During flight testing large flaps appeared create excessive drag during maneuvers flap/elevator movement changed two-tothree ratio shown plans works better flaps smaller deflec tions appear increase lift sufficiently square corners building up ex cessive drag original Tercel con structed adjustable elevator horn using Du-Bro Swiv-Link has worked satisfactorily after flights have found adjustable flap/eleva tor ratio elevator trim capability allows adjustments fine tuning can im prove flying characteristics stunt model balance point should further aft position shown plans model very sensitive balance point Ifyou arewantingto useyourmodel trainer learn stunt pattern funda mentals forward CG location recommended leadout positions shown plans satisfactory wind conditions would want fly though might want use some method adjust leadout positions have used Cox handle recom mend line spacing handle 1 less experi enced fliers line spacing 11/4 1 recommended Cox TD en gine 6-3 Cox gray prop running September 1976 79 kill FUEL TUBING Quality tubing Fuels High heat FEET specifically com pounded Gb resistant noncollapsible No 162 9cL Tercel continued mild fuel 10% nitro less 0008 diameter stranded lines up 52 ft can used cables available Sig Pylon cannot obtain lines dealer X-Cell Models Inc 347 Eastland Shopping Center Lexington KY 40505 can contacted prices availability Flying models new experience have booming horsepower larger competition models line tension considerably less However ro tational speed 45- 50-ft lines about same larger models Tercel can useful tool sharpen re conditions fuels exact ignition specifications particular glow plug Its easy-toread 0-10 amp ammeter shows precise power output will tell glance plug good engine flooded self-contained 2 volt battery may recharged over 150 times has fully charged rating 5 ampere hours peak power 200 watts circuitry safety fused 2 diameter highimpact polypropylene case has fluted base convenient han dling have add lead wires plug connector choice color-coded labeled terminals Buy GloBee Fire Plug hobby dealer today oy years fast reliable engine starts perfectly matched special requirements flexes its response very quick have yet looked up Ter cel male hawk particular pere grine falcon interested Control Line Precision Aerobatics want keep formed latest happenings competition scene should consider joining Precision Aerobatics Model Pilots Association dedicated promotion CL Precision Aerobatics Annual dues membership cludes monthly newsletter $600 care Wynn Paul 1630 Maywick Dr Lexington KY 40504 address Keith Trostle 10900 Phillips Dr Upper Marlboro MD 20870 DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 RC Scale/Atkinson continued page 26 Using good pair gloves place butyrate sheet about 4 heating element slowly move back forth until plastic becomes pliable starts sag also should start smoke Im mediately remove heat lay over plug vise carefully center ing same time very firmly pull straight down over plug must done very quickly plastic will cool quickly around outer edges will distort form plug Hold several minutes cool let set about 10 mm until completely cooled Remove trim suit rea son canopy does come out right may reheat plastic sheet will slowly resume its original shape Its im portant its hot enough care should taken get too hot because canopy will distort clear may want try sample run before form ing canopy Trimming may painted use trim tape prepainted masking tape cut small strips three pictures show steps complete canopy items may formed manner such gun turrets gun bubbles lights etc time writing have just re turned 4th Annual Mint Julep R/C Meet Rough River Park Ken tucky has finest scale meets country Facilities superb Setting rolling hills north cen tral Kentucky lovely park lake facilities about 2500 ft black-top runway fly state Kentuckys Park Dept co-sponsor contest novelty itself certainly need help cooperation such parks governing bodies Kentucky Park Commission highly commended fine help further interest RC sport hobby flaw meet poor cooperation weather man rained off both Saturday Sun day Still flyable weather although wind little across runway Im afraid heavy rain cold weather Friday night may have kept some contest ants attending Although quan tity down quality evident both static flying attend ance three multi-engine stand-offs two Aerocommanders B-25 variety aircraft truly made up lower number scale models seen past years interesting innovations static turntable slowly rotated give judges really good look model table about 4 ft diameter stood about 2 ft ground gave judges chance see undercarriage plainly well underbelly model table could turned slowly use electric drill large dowel running turn 80 Model Aviation Fire Plug. optimum starting power need power source youll need years glow plug lights new GloBee Fire Plug GloBee Fire Plug igniterits completely inte grated glow plug starting system Its easy-to-operate rheostat con trol lever provides optimum current match weather I
Edition: Model Aviation - 1976/09
Page Numbers: 28, 29, 30, 31, 79, 80
rhj Keith Trostle THE POPULARITY power various types models growing Per haps reasons trend increasing price materials used hobby particularly balsa engines fuel Initial investment build keep /2A model flying considerably less larger counterparts Cox TD lists less $2000 proper care will give hours trouble-free operation hours flying time will use considerably less fuel too have ventured using Y2A power models others speed free flight events have received bonus surprise performance models demonstrate Reference made several glowing articles published last two years RC pattern ships fast growing Y2A RC pylon events Interest Precision Aerobatics stunt similarly growing across country interest has further kindled unofficial stunt events sponsored Cox last three Nit tionals Precision Aerobatic Model Pilots Association PAMPA assisted Cox running unofficial events year people have participated larger numbers saying will compete next year standardize event recent 76 Nats special PAMPA committee formed draw up set rules meant easily understood relatively non-restrictive keep event could compete enjoy Arlie Preszler chairman committee has considerable ex perience flying /2A stunt contests North ern California Arlie also volunteered capable services 76 Nats stunt Event Director contributions appreciated participate event rules used 76 Nats endorsed PAMPA used guidelines local level competition Re finements following guidelines will made necessary published monthly PAMPA publication Stunt News experience gained PRECISION AEROBATICS Engine displacement 051 cu maxi mum Builder-of-the-model No requirement Entries entry per pilot pilot per airplane Back-up model per AMA rules allowed Appearance points None Lines pull test 008 diameter 5 lbs Pattern Per AMA rule book CL Pre cision Aerobatics Attempts Per AMA rule book CL Precision Aerobatics Identification Per AMA rule book CL Precision Aerobatics igh num bers permissible Competition results far have indi cated /2A stunt pleasant diversion Precision Aerobatics event pressure competition present stunt compared Precision Aerobatics certainly low key event can used introduction Precision Aerobatics minimum vestment time still gaining beneficial experience discipline necessary competitive Precision Aero batics models just plain fun build fly After seeing fully built-up Y2A stunt model during 1975 Winston-Salem Southeastern Championships wanted try own After reviewing files several Y2A stunt models found have published over last sev eral years include Ed Hunts Envoy Model Airplane News August 1964 Dick Mathis Pinto Flying Models December 1972 recently Tom Dixons Gremlin Model Builder May 1975 Also Larry Renger has several articles Flying Models about use foam-sheet wings available Cox used Cox Super Stunters felt improvements could made incorporating use larger flaps larger horizontal tail thicker airfoil what seen previous /2A designs relatively larger flaps tail used Tercel inspired Genesis/Scorpio/Stunt Machine full-size Precision Aerobatic designs Bob Hunt Bill Simons Gene Schaffer New Jersey/New York area models capable pilots flying some better patterns country square maneuvers among best will see turning ability Tercel 28 Model Aviation Cowl fits snugly around cylinder Cox QRC TO Note plumbing Uniflow tankas shown planwill give a-mm plus run Right Winner unofficial 1/2A Stunt event 75 Nats Tercel utilizes larger flaps bigger stabilizer 20%-thick blunt edged wing cowl removed show close fit engine full power TD used larger model possiblesuch 240 250 sq wing span 36 37 has certainly confirmed approach strongly believe thick blunt airfoils Precision Aerobatics airfoil shown design 20% thick including flaps similar Bart Klapinskis 1967 Nats winning Tempest quite popular West Coast size wing determined approximate average existing stunt designs lack vertical tail may appeal some concept taken trend seen East Coast attempt improve impression turning sharper corners keeping straight fuselage low profile use vertical tail Tercel may improve handling characteristics vertical maneuvers recommended feel appearance model would enhanced model shown plans easily adaptable profile type fuselage piece carefully selected t balsa 1/32 plywood doublers recom mended aft fuselage width should tapered just forward flap hinge line no 3/16 stabilizer hinge line reduce weight much possible No claim made ulti mate stunt design will prob ably never see such model feel design presented offers some ad vancement over previous models Its performance can termed satisfac tory demonstrated its win 75 Nats unofficial event performance stunt models particularly wind cannot yet compare curRight Access hole reveals use threaded ad justment horn attachment may wish try Below Front enddoublers mounts tank two bulkheadsattach unit wing Sides formers attach wing/nose unit rent 35- 46-powered Precision Aero batics designs time improvements may made will see Preci sion Aerobatic models competitive larger models may too far away now under certain condi tions much learned yet optimum size stunt Tercel can flown CoxQRC 049 Using full power available Cox TD larger model could considered much larger performance would enhanced known 240 250 sq wing 36 37 span feasible weight must kept absolute minimum Probably some improvement could realized after some experimenta tion airfoil sections 22% thick sec tion could considered section simi lar Al Rabe uses Mustunt American Modeler February 1973 successful super semi-scale stunters should explored own design phi losophies can experimented proven disproven considerably easier cheaper quicker models larger models Excellent cored foam wings 1/32 balsa sheeting available de sign Control Specialties Co 205 Wood Ave PO Box 268 Middlesex NJ 08846 Telephone ac 201 469-1663 Call write price availability Use foam wings recommended shortens construction time wing will September 1976 29 interest Half-A Stunt growing leaps bounds exceptional design well-known expert guarantees can fly acceptable pattern Above Tercel spitting image bigger Precision Aerobatics machines author feels may too far away seeing 1/2A stunters competitive larger aircraft II II 1/64 OR 1/32 tLYQOQ1S1ERI FORMER POSITIONSIIREMOVE THIS AREABUILT IF WING ON 2 INBOARD RIBS-INBOARD RIB TEMPLATE -FOAM CORE BUILT-UP WINOTIP PATTERN TIP RIB TEJLATE FOAM CORE ROOT PATTEIRI FOAM WINO WITH 1/32 SlEET AVALABLE FROM CONTROL SPECIALTIES CO 3/32 00 BRASS TUBINGI i-~-~ 111Ir - II Iii 3/32 SHEET RIBS 0LI2 VECO BELLCRAHE IIII- II zz FLEXIBLE /2 LEAD OUTS______________ ---7LiiIjt NYLON HINGE C L GE VECO MORN 4 F i II II F2 II I 3-40 SUNG NGTS810 IrE 8 45 Rim 4 POSITIONSFOR LO MOUNTS 1/8 SlEET WEB I/IS DIA MW LG STRUT LASH L 0 STRUT ON MOUNT WITH SOFT WIRE 3/SB 3/5 MAPLE MOTOR MOUNTS I/IS PLY LO MOUNT 2 NEOD I/IS PLY BELLCRANK MOUNT -~IIIl zJL-yrilI P BALSA FILLETS Z2Z 3/ISH 1/4 TE7 3/IS SHEET FLAPS 3/4 U 1/2 BLOCK \PAINTED CANOPY OUTLINE DA ACE SPNNERS/S SHEETI/IS DIA MWI PUSHNODS flT\ IIRJI ---~-11111 IT FOR3/32 SHEET FORMERS S SASS WOOD COWLI DIA WHEELS TANK FROM OOS BRASS AND 3/32 00- TUBING7 FUEL PICK-UP FILLER/VENT III OVERFLOW PLUS P05 P110gm UNIFLOW TANK DETAIL DIA WHEEL SMALL VECO HORN 3A6 SHEET II ___________________________________ 7 --1/4 SHEET HORIZONTAL TAILNYLON HINGE C L I/SOFFSET2345 TERCEL /2 STUNT 75510 SPAN33 IN AREA210 SO IN DESIGPIED BY KEITH TROSTLE CUT 3/32 SHEET FUSELAGE SIDES SLIGHTLY OVERSIZE FOR CURVAmBE 3/IS SHEET FIN 0 0 CD 0 0 Tercel Right Rear quarter view illustrated relationship control surfaces Original ship weigha 10-1/2 oz12 oz lathe maximum desirable warp weight will equivalent built-up wing shown plans built-up wing original using care fully selected wood weighed just less 3 oz complete tips flaps controls landing gear foam wing cores weigh less 2 oz before assembly wing Minimum weight important model size power available wing area considerably less full-size competition stunt model must offset much lighter wing load ing favorable power-to-weight ratio original Tercel weighs 10 ounces Twelve ounces should maxi mum weight allow constructing finishing model obtain foam wings follow instructions provided bellcrank instal lation wing assembly construct built-up wing sandwich 10 pieces 3/32 sheet balsa between root tip rib patterns shape ribs left right wing panels Assemble ribs spars leading trailing edges over plans ensuring no warps built wing Shape trailing edge add 1/32 trailing edge sheets Install bellcrank bellcrank mount pushrod leadouts add flaps Lash landing gear struts landing gear mounts soft wire install assembly third fourth ribs i/i balsa web landing gear mount top spar recommended Sheet leading edge center section Add tips shape leading edge tips Cut shape horizontal tail parts Add horn assemble elevators stabilizer Assemble nose unit consisting doublers motor mounts tank first two formers unit epoxy Epoxy unit wing making sure proper alignment thrust line maintained Assemble fuselage sides formers nose/wing assembly making sure fuselage straight Add horizontal tail assembly checking zero incidence wing main tained Add tail wheel strut top bottom fuselage blocks fillets fin Shape sand fuselage desired cioss section cowl carved piece basswood hard balsa Finish original kept minimum reduce weight Two coats Sig clear Lite Coat brushed entire structure sanded wings flaps covered Japanese tis sue given 4 coats thinned clear dope Several coats sanding sealer brushed fuselage flaps tail sanding between coat until grain began disappear Two coats color sprayed trim added continued page 79 September 1976 31 Above Foam wings optional com mercially availablesee text come 1/32 skinning Built-up bare wing weighs less 3 oz foam 2 oz before assembly Nothing like job well done Cox TO 6 x 3 Cox gray prop used mild fuel Lines 008 stranded up 62 ft long FF Champs/Meuser continued page 8 June issue Model Builder flew beautifully Mather Warner tried level best lose Peanut Scale mcdels thermals Warner put up least flight around five mm Other names such Cover Moss Mulligan promi nent winners lists three scale events also wonder leg being pulled see M Mulligan top list Indoor Peanut Next theyll trying tell Mister Mulligan flying peanut-scale model Bill Warner Night Flying event routine contests arranged Southerncali forniacs might seem bit strange used conventional after-sun down pursuits frequently make seem easy chemical light semi-haywire arrangement batteries wires lamp bulb taped rubber-banded onto fuselage con ventional Gas model usually large B C-class model gasoline lanternor per haps snazzier cordless electrics raises local environment slightly above threshold visibility flier rest conventional competition free flight chaser timer best can said chances contracting sunstroke extremely small Xenakis kids hooked chem light hand-launch glider worked out reasonably well should pardon expressiona radio controlled Old-Timer model out try ing its thing under worst cir cumstances Maybe could hold entire Nats night quiet meet change No blaring radios few motorcyclists demon strated cleverness making noise kicking up dust nobody got Hot Stuff eyes severe lacerations prop nobody sank gurgling quick sand ponds surrounding local kittylitter works scarcely anybody reported loved being eaten rattlesnake Actually sort dull such extra curricular aspects cant win em all. RO KWIK- FILL FUEL PUMP 4c- EI Du NEW CONCEPT IN FUEL PUMPS ONE MOVING PART NOTHING TO BREAK OR WEAR OUT ONLY $1A95 IL No191 iIiUrn LIGHT COMPACT AND RUGGED PUMP IS ONLY 2 WIDE AND 2-7/8 IN DIAMETER HAND OPERATED AND REVERSIBLE PUMPS IN AND OUT HIGH VOLUME FLOW ATTRACTIVE BLACK PUMP COMES ASSEMBLED AND MOUNTS ON GALLON CANS QUICK EASY INSTALLA TION PUMP COMES COMPLETE WITH STEEL MOUNTING BRACKETS HARDWARE AND FUEL TUBING DU-BRO PRODUCTS INCORPORATED 480 Banner Road Wauconda Illinois 60084 TANK FILTER Combination weight filter Designed fit clunk tanks Made sintered bronze give ultimate filtering No 16198c Tercel/Trostle continued page 31 little work small penalty weight models can made look good full-scale stunters tank shown large enough give engine run well over 8 mm may desire make tank rter keep engine run within 8-mm limit have measure fuel flying competition uniflow tank shown plans has given very satisfac tory performance flap/elevator movement ori ginal model first set up one-toone ratio During flight testing large flaps appeared create excessive drag during maneuvers flap/elevator movement changed two-tothree ratio shown plans works better flaps smaller deflec tions appear increase lift sufficiently square corners building up ex cessive drag original Tercel con structed adjustable elevator horn using Du-Bro Swiv-Link has worked satisfactorily after flights have found adjustable flap/eleva tor ratio elevator trim capability allows adjustments fine tuning can im prove flying characteristics stunt model balance point should further aft position shown plans model very sensitive balance point Ifyou arewantingto useyourmodel trainer learn stunt pattern funda mentals forward CG location recommended leadout positions shown plans satisfactory wind conditions would want fly though might want use some method adjust leadout positions have used Cox handle recom mend line spacing handle 1 less experi enced fliers line spacing 11/4 1 recommended Cox TD en gine 6-3 Cox gray prop running September 1976 79 kill FUEL TUBING Quality tubing Fuels High heat FEET specifically com pounded Gb resistant noncollapsible No 162 9cL Tercel continued mild fuel 10% nitro less 0008 diameter stranded lines up 52 ft can used cables available Sig Pylon cannot obtain lines dealer X-Cell Models Inc 347 Eastland Shopping Center Lexington KY 40505 can contacted prices availability Flying models new experience have booming horsepower larger competition models line tension considerably less However ro tational speed 45- 50-ft lines about same larger models Tercel can useful tool sharpen re conditions fuels exact ignition specifications particular glow plug Its easy-toread 0-10 amp ammeter shows precise power output will tell glance plug good engine flooded self-contained 2 volt battery may recharged over 150 times has fully charged rating 5 ampere hours peak power 200 watts circuitry safety fused 2 diameter highimpact polypropylene case has fluted base convenient han dling have add lead wires plug connector choice color-coded labeled terminals Buy GloBee Fire Plug hobby dealer today oy years fast reliable engine starts perfectly matched special requirements flexes its response very quick have yet looked up Ter cel male hawk particular pere grine falcon interested Control Line Precision Aerobatics want keep formed latest happenings competition scene should consider joining Precision Aerobatics Model Pilots Association dedicated promotion CL Precision Aerobatics Annual dues membership cludes monthly newsletter $600 care Wynn Paul 1630 Maywick Dr Lexington KY 40504 address Keith Trostle 10900 Phillips Dr Upper Marlboro MD 20870 DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 RC Scale/Atkinson continued page 26 Using good pair gloves place butyrate sheet about 4 heating element slowly move back forth until plastic becomes pliable starts sag also should start smoke Im mediately remove heat lay over plug vise carefully center ing same time very firmly pull straight down over plug must done very quickly plastic will cool quickly around outer edges will distort form plug Hold several minutes cool let set about 10 mm until completely cooled Remove trim suit rea son canopy does come out right may reheat plastic sheet will slowly resume its original shape Its im portant its hot enough care should taken get too hot because canopy will distort clear may want try sample run before form ing canopy Trimming may painted use trim tape prepainted masking tape cut small strips three pictures show steps complete canopy items may formed manner such gun turrets gun bubbles lights etc time writing have just re turned 4th Annual Mint Julep R/C Meet Rough River Park Ken tucky has finest scale meets country Facilities superb Setting rolling hills north cen tral Kentucky lovely park lake facilities about 2500 ft black-top runway fly state Kentuckys Park Dept co-sponsor contest novelty itself certainly need help cooperation such parks governing bodies Kentucky Park Commission highly commended fine help further interest RC sport hobby flaw meet poor cooperation weather man rained off both Saturday Sun day Still flyable weather although wind little across runway Im afraid heavy rain cold weather Friday night may have kept some contest ants attending Although quan tity down quality evident both static flying attend ance three multi-engine stand-offs two Aerocommanders B-25 variety aircraft truly made up lower number scale models seen past years interesting innovations static turntable slowly rotated give judges really good look model table about 4 ft diameter stood about 2 ft ground gave judges chance see undercarriage plainly well underbelly model table could turned slowly use electric drill large dowel running turn 80 Model Aviation Fire Plug. optimum starting power need power source youll need years glow plug lights new GloBee Fire Plug GloBee Fire Plug igniterits completely inte grated glow plug starting system Its easy-to-operate rheostat con trol lever provides optimum current match weather I
Edition: Model Aviation - 1976/09
Page Numbers: 28, 29, 30, 31, 79, 80
rhj Keith Trostle THE POPULARITY power various types models growing Per haps reasons trend increasing price materials used hobby particularly balsa engines fuel Initial investment build keep /2A model flying considerably less larger counterparts Cox TD lists less $2000 proper care will give hours trouble-free operation hours flying time will use considerably less fuel too have ventured using Y2A power models others speed free flight events have received bonus surprise performance models demonstrate Reference made several glowing articles published last two years RC pattern ships fast growing Y2A RC pylon events Interest Precision Aerobatics stunt similarly growing across country interest has further kindled unofficial stunt events sponsored Cox last three Nit tionals Precision Aerobatic Model Pilots Association PAMPA assisted Cox running unofficial events year people have participated larger numbers saying will compete next year standardize event recent 76 Nats special PAMPA committee formed draw up set rules meant easily understood relatively non-restrictive keep event could compete enjoy Arlie Preszler chairman committee has considerable ex perience flying /2A stunt contests North ern California Arlie also volunteered capable services 76 Nats stunt Event Director contributions appreciated participate event rules used 76 Nats endorsed PAMPA used guidelines local level competition Re finements following guidelines will made necessary published monthly PAMPA publication Stunt News experience gained PRECISION AEROBATICS Engine displacement 051 cu maxi mum Builder-of-the-model No requirement Entries entry per pilot pilot per airplane Back-up model per AMA rules allowed Appearance points None Lines pull test 008 diameter 5 lbs Pattern Per AMA rule book CL Pre cision Aerobatics Attempts Per AMA rule book CL Precision Aerobatics Identification Per AMA rule book CL Precision Aerobatics igh num bers permissible Competition results far have indi cated /2A stunt pleasant diversion Precision Aerobatics event pressure competition present stunt compared Precision Aerobatics certainly low key event can used introduction Precision Aerobatics minimum vestment time still gaining beneficial experience discipline necessary competitive Precision Aero batics models just plain fun build fly After seeing fully built-up Y2A stunt model during 1975 Winston-Salem Southeastern Championships wanted try own After reviewing files several Y2A stunt models found have published over last sev eral years include Ed Hunts Envoy Model Airplane News August 1964 Dick Mathis Pinto Flying Models December 1972 recently Tom Dixons Gremlin Model Builder May 1975 Also Larry Renger has several articles Flying Models about use foam-sheet wings available Cox used Cox Super Stunters felt improvements could made incorporating use larger flaps larger horizontal tail thicker airfoil what seen previous /2A designs relatively larger flaps tail used Tercel inspired Genesis/Scorpio/Stunt Machine full-size Precision Aerobatic designs Bob Hunt Bill Simons Gene Schaffer New Jersey/New York area models capable pilots flying some better patterns country square maneuvers among best will see turning ability Tercel 28 Model Aviation Cowl fits snugly around cylinder Cox QRC TO Note plumbing Uniflow tankas shown planwill give a-mm plus run Right Winner unofficial 1/2A Stunt event 75 Nats Tercel utilizes larger flaps bigger stabilizer 20%-thick blunt edged wing cowl removed show close fit engine full power TD used larger model possiblesuch 240 250 sq wing span 36 37 has certainly confirmed approach strongly believe thick blunt airfoils Precision Aerobatics airfoil shown design 20% thick including flaps similar Bart Klapinskis 1967 Nats winning Tempest quite popular West Coast size wing determined approximate average existing stunt designs lack vertical tail may appeal some concept taken trend seen East Coast attempt improve impression turning sharper corners keeping straight fuselage low profile use vertical tail Tercel may improve handling characteristics vertical maneuvers recommended feel appearance model would enhanced model shown plans easily adaptable profile type fuselage piece carefully selected t balsa 1/32 plywood doublers recom mended aft fuselage width should tapered just forward flap hinge line no 3/16 stabilizer hinge line reduce weight much possible No claim made ulti mate stunt design will prob ably never see such model feel design presented offers some ad vancement over previous models Its performance can termed satisfac tory demonstrated its win 75 Nats unofficial event performance stunt models particularly wind cannot yet compare curRight Access hole reveals use threaded ad justment horn attachment may wish try Below Front enddoublers mounts tank two bulkheadsattach unit wing Sides formers attach wing/nose unit rent 35- 46-powered Precision Aero batics designs time improvements may made will see Preci sion Aerobatic models competitive larger models may too far away now under certain condi tions much learned yet optimum size stunt Tercel can flown CoxQRC 049 Using full power available Cox TD larger model could considered much larger performance would enhanced known 240 250 sq wing 36 37 span feasible weight must kept absolute minimum Probably some improvement could realized after some experimenta tion airfoil sections 22% thick sec tion could considered section simi lar Al Rabe uses Mustunt American Modeler February 1973 successful super semi-scale stunters should explored own design phi losophies can experimented proven disproven considerably easier cheaper quicker models larger models Excellent cored foam wings 1/32 balsa sheeting available de sign Control Specialties Co 205 Wood Ave PO Box 268 Middlesex NJ 08846 Telephone ac 201 469-1663 Call write price availability Use foam wings recommended shortens construction time wing will September 1976 29 interest Half-A Stunt growing leaps bounds exceptional design well-known expert guarantees can fly acceptable pattern Above Tercel spitting image bigger Precision Aerobatics machines author feels may too far away seeing 1/2A stunters competitive larger aircraft II II 1/64 OR 1/32 tLYQOQ1S1ERI FORMER POSITIONSIIREMOVE THIS AREABUILT IF WING ON 2 INBOARD RIBS-INBOARD RIB TEMPLATE -FOAM CORE BUILT-UP WINOTIP PATTERN TIP RIB TEJLATE FOAM CORE ROOT PATTEIRI FOAM WINO WITH 1/32 SlEET AVALABLE FROM CONTROL SPECIALTIES CO 3/32 00 BRASS TUBINGI i-~-~ 111Ir - II Iii 3/32 SHEET RIBS 0LI2 VECO BELLCRAHE IIII- II zz FLEXIBLE /2 LEAD OUTS______________ ---7LiiIjt NYLON HINGE C L GE VECO MORN 4 F i II II F2 II I 3-40 SUNG NGTS810 IrE 8 45 Rim 4 POSITIONSFOR LO MOUNTS 1/8 SlEET WEB I/IS DIA MW LG STRUT LASH L 0 STRUT ON MOUNT WITH SOFT WIRE 3/SB 3/5 MAPLE MOTOR MOUNTS I/IS PLY LO MOUNT 2 NEOD I/IS PLY BELLCRANK MOUNT -~IIIl zJL-yrilI P BALSA FILLETS Z2Z 3/ISH 1/4 TE7 3/IS SHEET FLAPS 3/4 U 1/2 BLOCK \PAINTED CANOPY OUTLINE DA ACE SPNNERS/S SHEETI/IS DIA MWI PUSHNODS flT\ IIRJI ---~-11111 IT FOR3/32 SHEET FORMERS S SASS WOOD COWLI DIA WHEELS TANK FROM OOS BRASS AND 3/32 00- TUBING7 FUEL PICK-UP FILLER/VENT III OVERFLOW PLUS P05 P110gm UNIFLOW TANK DETAIL DIA WHEEL SMALL VECO HORN 3A6 SHEET II ___________________________________ 7 --1/4 SHEET HORIZONTAL TAILNYLON HINGE C L I/SOFFSET2345 TERCEL /2 STUNT 75510 SPAN33 IN AREA210 SO IN DESIGPIED BY KEITH TROSTLE CUT 3/32 SHEET FUSELAGE SIDES SLIGHTLY OVERSIZE FOR CURVAmBE 3/IS SHEET FIN 0 0 CD 0 0 Tercel Right Rear quarter view illustrated relationship control surfaces Original ship weigha 10-1/2 oz12 oz lathe maximum desirable warp weight will equivalent built-up wing shown plans built-up wing original using care fully selected wood weighed just less 3 oz complete tips flaps controls landing gear foam wing cores weigh less 2 oz before assembly wing Minimum weight important model size power available wing area considerably less full-size competition stunt model must offset much lighter wing load ing favorable power-to-weight ratio original Tercel weighs 10 ounces Twelve ounces should maxi mum weight allow constructing finishing model obtain foam wings follow instructions provided bellcrank instal lation wing assembly construct built-up wing sandwich 10 pieces 3/32 sheet balsa between root tip rib patterns shape ribs left right wing panels Assemble ribs spars leading trailing edges over plans ensuring no warps built wing Shape trailing edge add 1/32 trailing edge sheets Install bellcrank bellcrank mount pushrod leadouts add flaps Lash landing gear struts landing gear mounts soft wire install assembly third fourth ribs i/i balsa web landing gear mount top spar recommended Sheet leading edge center section Add tips shape leading edge tips Cut shape horizontal tail parts Add horn assemble elevators stabilizer Assemble nose unit consisting doublers motor mounts tank first two formers unit epoxy Epoxy unit wing making sure proper alignment thrust line maintained Assemble fuselage sides formers nose/wing assembly making sure fuselage straight Add horizontal tail assembly checking zero incidence wing main tained Add tail wheel strut top bottom fuselage blocks fillets fin Shape sand fuselage desired cioss section cowl carved piece basswood hard balsa Finish original kept minimum reduce weight Two coats Sig clear Lite Coat brushed entire structure sanded wings flaps covered Japanese tis sue given 4 coats thinned clear dope Several coats sanding sealer brushed fuselage flaps tail sanding between coat until grain began disappear Two coats color sprayed trim added continued page 79 September 1976 31 Above Foam wings optional com mercially availablesee text come 1/32 skinning Built-up bare wing weighs less 3 oz foam 2 oz before assembly Nothing like job well done Cox TO 6 x 3 Cox gray prop used mild fuel Lines 008 stranded up 62 ft long FF Champs/Meuser continued page 8 June issue Model Builder flew beautifully Mather Warner tried level best lose Peanut Scale mcdels thermals Warner put up least flight around five mm Other names such Cover Moss Mulligan promi nent winners lists three scale events also wonder leg being pulled see M Mulligan top list Indoor Peanut Next theyll trying tell Mister Mulligan flying peanut-scale model Bill Warner Night Flying event routine contests arranged Southerncali forniacs might seem bit strange used conventional after-sun down pursuits frequently make seem easy chemical light semi-haywire arrangement batteries wires lamp bulb taped rubber-banded onto fuselage con ventional Gas model usually large B C-class model gasoline lanternor per haps snazzier cordless electrics raises local environment slightly above threshold visibility flier rest conventional competition free flight chaser timer best can said chances contracting sunstroke extremely small Xenakis kids hooked chem light hand-launch glider worked out reasonably well should pardon expressiona radio controlled Old-Timer model out try ing its thing under worst cir cumstances Maybe could hold entire Nats night quiet meet change No blaring radios few motorcyclists demon strated cleverness making noise kicking up dust nobody got Hot Stuff eyes severe lacerations prop nobody sank gurgling quick sand ponds surrounding local kittylitter works scarcely anybody reported loved being eaten rattlesnake Actually sort dull such extra curricular aspects cant win em all. RO KWIK- FILL FUEL PUMP 4c- EI Du NEW CONCEPT IN FUEL PUMPS ONE MOVING PART NOTHING TO BREAK OR WEAR OUT ONLY $1A95 IL No191 iIiUrn LIGHT COMPACT AND RUGGED PUMP IS ONLY 2 WIDE AND 2-7/8 IN DIAMETER HAND OPERATED AND REVERSIBLE PUMPS IN AND OUT HIGH VOLUME FLOW ATTRACTIVE BLACK PUMP COMES ASSEMBLED AND MOUNTS ON GALLON CANS QUICK EASY INSTALLA TION PUMP COMES COMPLETE WITH STEEL MOUNTING BRACKETS HARDWARE AND FUEL TUBING DU-BRO PRODUCTS INCORPORATED 480 Banner Road Wauconda Illinois 60084 TANK FILTER Combination weight filter Designed fit clunk tanks Made sintered bronze give ultimate filtering No 16198c Tercel/Trostle continued page 31 little work small penalty weight models can made look good full-scale stunters tank shown large enough give engine run well over 8 mm may desire make tank rter keep engine run within 8-mm limit have measure fuel flying competition uniflow tank shown plans has given very satisfac tory performance flap/elevator movement ori ginal model first set up one-toone ratio During flight testing large flaps appeared create excessive drag during maneuvers flap/elevator movement changed two-tothree ratio shown plans works better flaps smaller deflec tions appear increase lift sufficiently square corners building up ex cessive drag original Tercel con structed adjustable elevator horn using Du-Bro Swiv-Link has worked satisfactorily after flights have found adjustable flap/eleva tor ratio elevator trim capability allows adjustments fine tuning can im prove flying characteristics stunt model balance point should further aft position shown plans model very sensitive balance point Ifyou arewantingto useyourmodel trainer learn stunt pattern funda mentals forward CG location recommended leadout positions shown plans satisfactory wind conditions would want fly though might want use some method adjust leadout positions have used Cox handle recom mend line spacing handle 1 less experi enced fliers line spacing 11/4 1 recommended Cox TD en gine 6-3 Cox gray prop running September 1976 79 kill FUEL TUBING Quality tubing Fuels High heat FEET specifically com pounded Gb resistant noncollapsible No 162 9cL Tercel continued mild fuel 10% nitro less 0008 diameter stranded lines up 52 ft can used cables available Sig Pylon cannot obtain lines dealer X-Cell Models Inc 347 Eastland Shopping Center Lexington KY 40505 can contacted prices availability Flying models new experience have booming horsepower larger competition models line tension considerably less However ro tational speed 45- 50-ft lines about same larger models Tercel can useful tool sharpen re conditions fuels exact ignition specifications particular glow plug Its easy-toread 0-10 amp ammeter shows precise power output will tell glance plug good engine flooded self-contained 2 volt battery may recharged over 150 times has fully charged rating 5 ampere hours peak power 200 watts circuitry safety fused 2 diameter highimpact polypropylene case has fluted base convenient han dling have add lead wires plug connector choice color-coded labeled terminals Buy GloBee Fire Plug hobby dealer today oy years fast reliable engine starts perfectly matched special requirements flexes its response very quick have yet looked up Ter cel male hawk particular pere grine falcon interested Control Line Precision Aerobatics want keep formed latest happenings competition scene should consider joining Precision Aerobatics Model Pilots Association dedicated promotion CL Precision Aerobatics Annual dues membership cludes monthly newsletter $600 care Wynn Paul 1630 Maywick Dr Lexington KY 40504 address Keith Trostle 10900 Phillips Dr Upper Marlboro MD 20870 DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 RC Scale/Atkinson continued page 26 Using good pair gloves place butyrate sheet about 4 heating element slowly move back forth until plastic becomes pliable starts sag also should start smoke Im mediately remove heat lay over plug vise carefully center ing same time very firmly pull straight down over plug must done very quickly plastic will cool quickly around outer edges will distort form plug Hold several minutes cool let set about 10 mm until completely cooled Remove trim suit rea son canopy does come out right may reheat plastic sheet will slowly resume its original shape Its im portant its hot enough care should taken get too hot because canopy will distort clear may want try sample run before form ing canopy Trimming may painted use trim tape prepainted masking tape cut small strips three pictures show steps complete canopy items may formed manner such gun turrets gun bubbles lights etc time writing have just re turned 4th Annual Mint Julep R/C Meet Rough River Park Ken tucky has finest scale meets country Facilities superb Setting rolling hills north cen tral Kentucky lovely park lake facilities about 2500 ft black-top runway fly state Kentuckys Park Dept co-sponsor contest novelty itself certainly need help cooperation such parks governing bodies Kentucky Park Commission highly commended fine help further interest RC sport hobby flaw meet poor cooperation weather man rained off both Saturday Sun day Still flyable weather although wind little across runway Im afraid heavy rain cold weather Friday night may have kept some contest ants attending Although quan tity down quality evident both static flying attend ance three multi-engine stand-offs two Aerocommanders B-25 variety aircraft truly made up lower number scale models seen past years interesting innovations static turntable slowly rotated give judges really good look model table about 4 ft diameter stood about 2 ft ground gave judges chance see undercarriage plainly well underbelly model table could turned slowly use electric drill large dowel running turn 80 Model Aviation Fire Plug. optimum starting power need power source youll need years glow plug lights new GloBee Fire Plug GloBee Fire Plug igniterits completely inte grated glow plug starting system Its easy-to-operate rheostat con trol lever provides optimum current match weather I
Edition: Model Aviation - 1976/09
Page Numbers: 28, 29, 30, 31, 79, 80
rhj Keith Trostle THE POPULARITY power various types models growing Per haps reasons trend increasing price materials used hobby particularly balsa engines fuel Initial investment build keep /2A model flying considerably less larger counterparts Cox TD lists less $2000 proper care will give hours trouble-free operation hours flying time will use considerably less fuel too have ventured using Y2A power models others speed free flight events have received bonus surprise performance models demonstrate Reference made several glowing articles published last two years RC pattern ships fast growing Y2A RC pylon events Interest Precision Aerobatics stunt similarly growing across country interest has further kindled unofficial stunt events sponsored Cox last three Nit tionals Precision Aerobatic Model Pilots Association PAMPA assisted Cox running unofficial events year people have participated larger numbers saying will compete next year standardize event recent 76 Nats special PAMPA committee formed draw up set rules meant easily understood relatively non-restrictive keep event could compete enjoy Arlie Preszler chairman committee has considerable ex perience flying /2A stunt contests North ern California Arlie also volunteered capable services 76 Nats stunt Event Director contributions appreciated participate event rules used 76 Nats endorsed PAMPA used guidelines local level competition Re finements following guidelines will made necessary published monthly PAMPA publication Stunt News experience gained PRECISION AEROBATICS Engine displacement 051 cu maxi mum Builder-of-the-model No requirement Entries entry per pilot pilot per airplane Back-up model per AMA rules allowed Appearance points None Lines pull test 008 diameter 5 lbs Pattern Per AMA rule book CL Pre cision Aerobatics Attempts Per AMA rule book CL Precision Aerobatics Identification Per AMA rule book CL Precision Aerobatics igh num bers permissible Competition results far have indi cated /2A stunt pleasant diversion Precision Aerobatics event pressure competition present stunt compared Precision Aerobatics certainly low key event can used introduction Precision Aerobatics minimum vestment time still gaining beneficial experience discipline necessary competitive Precision Aero batics models just plain fun build fly After seeing fully built-up Y2A stunt model during 1975 Winston-Salem Southeastern Championships wanted try own After reviewing files several Y2A stunt models found have published over last sev eral years include Ed Hunts Envoy Model Airplane News August 1964 Dick Mathis Pinto Flying Models December 1972 recently Tom Dixons Gremlin Model Builder May 1975 Also Larry Renger has several articles Flying Models about use foam-sheet wings available Cox used Cox Super Stunters felt improvements could made incorporating use larger flaps larger horizontal tail thicker airfoil what seen previous /2A designs relatively larger flaps tail used Tercel inspired Genesis/Scorpio/Stunt Machine full-size Precision Aerobatic designs Bob Hunt Bill Simons Gene Schaffer New Jersey/New York area models capable pilots flying some better patterns country square maneuvers among best will see turning ability Tercel 28 Model Aviation Cowl fits snugly around cylinder Cox QRC TO Note plumbing Uniflow tankas shown planwill give a-mm plus run Right Winner unofficial 1/2A Stunt event 75 Nats Tercel utilizes larger flaps bigger stabilizer 20%-thick blunt edged wing cowl removed show close fit engine full power TD used larger model possiblesuch 240 250 sq wing span 36 37 has certainly confirmed approach strongly believe thick blunt airfoils Precision Aerobatics airfoil shown design 20% thick including flaps similar Bart Klapinskis 1967 Nats winning Tempest quite popular West Coast size wing determined approximate average existing stunt designs lack vertical tail may appeal some concept taken trend seen East Coast attempt improve impression turning sharper corners keeping straight fuselage low profile use vertical tail Tercel may improve handling characteristics vertical maneuvers recommended feel appearance model would enhanced model shown plans easily adaptable profile type fuselage piece carefully selected t balsa 1/32 plywood doublers recom mended aft fuselage width should tapered just forward flap hinge line no 3/16 stabilizer hinge line reduce weight much possible No claim made ulti mate stunt design will prob ably never see such model feel design presented offers some ad vancement over previous models Its performance can termed satisfac tory demonstrated its win 75 Nats unofficial event performance stunt models particularly wind cannot yet compare curRight Access hole reveals use threaded ad justment horn attachment may wish try Below Front enddoublers mounts tank two bulkheadsattach unit wing Sides formers attach wing/nose unit rent 35- 46-powered Precision Aero batics designs time improvements may made will see Preci sion Aerobatic models competitive larger models may too far away now under certain condi tions much learned yet optimum size stunt Tercel can flown CoxQRC 049 Using full power available Cox TD larger model could considered much larger performance would enhanced known 240 250 sq wing 36 37 span feasible weight must kept absolute minimum Probably some improvement could realized after some experimenta tion airfoil sections 22% thick sec tion could considered section simi lar Al Rabe uses Mustunt American Modeler February 1973 successful super semi-scale stunters should explored own design phi losophies can experimented proven disproven considerably easier cheaper quicker models larger models Excellent cored foam wings 1/32 balsa sheeting available de sign Control Specialties Co 205 Wood Ave PO Box 268 Middlesex NJ 08846 Telephone ac 201 469-1663 Call write price availability Use foam wings recommended shortens construction time wing will September 1976 29 interest Half-A Stunt growing leaps bounds exceptional design well-known expert guarantees can fly acceptable pattern Above Tercel spitting image bigger Precision Aerobatics machines author feels may too far away seeing 1/2A stunters competitive larger aircraft II II 1/64 OR 1/32 tLYQOQ1S1ERI FORMER POSITIONSIIREMOVE THIS AREABUILT IF WING ON 2 INBOARD RIBS-INBOARD RIB TEMPLATE -FOAM CORE BUILT-UP WINOTIP PATTERN TIP RIB TEJLATE FOAM CORE ROOT PATTEIRI FOAM WINO WITH 1/32 SlEET AVALABLE FROM CONTROL SPECIALTIES CO 3/32 00 BRASS TUBINGI i-~-~ 111Ir - II Iii 3/32 SHEET RIBS 0LI2 VECO BELLCRAHE IIII- II zz FLEXIBLE /2 LEAD OUTS______________ ---7LiiIjt NYLON HINGE C L GE VECO MORN 4 F i II II F2 II I 3-40 SUNG NGTS810 IrE 8 45 Rim 4 POSITIONSFOR LO MOUNTS 1/8 SlEET WEB I/IS DIA MW LG STRUT LASH L 0 STRUT ON MOUNT WITH SOFT WIRE 3/SB 3/5 MAPLE MOTOR MOUNTS I/IS PLY LO MOUNT 2 NEOD I/IS PLY BELLCRANK MOUNT -~IIIl zJL-yrilI P BALSA FILLETS Z2Z 3/ISH 1/4 TE7 3/IS SHEET FLAPS 3/4 U 1/2 BLOCK \PAINTED CANOPY OUTLINE DA ACE SPNNERS/S SHEETI/IS DIA MWI PUSHNODS flT\ IIRJI ---~-11111 IT FOR3/32 SHEET FORMERS S SASS WOOD COWLI DIA WHEELS TANK FROM OOS BRASS AND 3/32 00- TUBING7 FUEL PICK-UP FILLER/VENT III OVERFLOW PLUS P05 P110gm UNIFLOW TANK DETAIL DIA WHEEL SMALL VECO HORN 3A6 SHEET II ___________________________________ 7 --1/4 SHEET HORIZONTAL TAILNYLON HINGE C L I/SOFFSET2345 TERCEL /2 STUNT 75510 SPAN33 IN AREA210 SO IN DESIGPIED BY KEITH TROSTLE CUT 3/32 SHEET FUSELAGE SIDES SLIGHTLY OVERSIZE FOR CURVAmBE 3/IS SHEET FIN 0 0 CD 0 0 Tercel Right Rear quarter view illustrated relationship control surfaces Original ship weigha 10-1/2 oz12 oz lathe maximum desirable warp weight will equivalent built-up wing shown plans built-up wing original using care fully selected wood weighed just less 3 oz complete tips flaps controls landing gear foam wing cores weigh less 2 oz before assembly wing Minimum weight important model size power available wing area considerably less full-size competition stunt model must offset much lighter wing load ing favorable power-to-weight ratio original Tercel weighs 10 ounces Twelve ounces should maxi mum weight allow constructing finishing model obtain foam wings follow instructions provided bellcrank instal lation wing assembly construct built-up wing sandwich 10 pieces 3/32 sheet balsa between root tip rib patterns shape ribs left right wing panels Assemble ribs spars leading trailing edges over plans ensuring no warps built wing Shape trailing edge add 1/32 trailing edge sheets Install bellcrank bellcrank mount pushrod leadouts add flaps Lash landing gear struts landing gear mounts soft wire install assembly third fourth ribs i/i balsa web landing gear mount top spar recommended Sheet leading edge center section Add tips shape leading edge tips Cut shape horizontal tail parts Add horn assemble elevators stabilizer Assemble nose unit consisting doublers motor mounts tank first two formers unit epoxy Epoxy unit wing making sure proper alignment thrust line maintained Assemble fuselage sides formers nose/wing assembly making sure fuselage straight Add horizontal tail assembly checking zero incidence wing main tained Add tail wheel strut top bottom fuselage blocks fillets fin Shape sand fuselage desired cioss section cowl carved piece basswood hard balsa Finish original kept minimum reduce weight Two coats Sig clear Lite Coat brushed entire structure sanded wings flaps covered Japanese tis sue given 4 coats thinned clear dope Several coats sanding sealer brushed fuselage flaps tail sanding between coat until grain began disappear Two coats color sprayed trim added continued page 79 September 1976 31 Above Foam wings optional com mercially availablesee text come 1/32 skinning Built-up bare wing weighs less 3 oz foam 2 oz before assembly Nothing like job well done Cox TO 6 x 3 Cox gray prop used mild fuel Lines 008 stranded up 62 ft long FF Champs/Meuser continued page 8 June issue Model Builder flew beautifully Mather Warner tried level best lose Peanut Scale mcdels thermals Warner put up least flight around five mm Other names such Cover Moss Mulligan promi nent winners lists three scale events also wonder leg being pulled see M Mulligan top list Indoor Peanut Next theyll trying tell Mister Mulligan flying peanut-scale model Bill Warner Night Flying event routine contests arranged Southerncali forniacs might seem bit strange used conventional after-sun down pursuits frequently make seem easy chemical light semi-haywire arrangement batteries wires lamp bulb taped rubber-banded onto fuselage con ventional Gas model usually large B C-class model gasoline lanternor per haps snazzier cordless electrics raises local environment slightly above threshold visibility flier rest conventional competition free flight chaser timer best can said chances contracting sunstroke extremely small Xenakis kids hooked chem light hand-launch glider worked out reasonably well should pardon expressiona radio controlled Old-Timer model out try ing its thing under worst cir cumstances Maybe could hold entire Nats night quiet meet change No blaring radios few motorcyclists demon strated cleverness making noise kicking up dust nobody got Hot Stuff eyes severe lacerations prop nobody sank gurgling quick sand ponds surrounding local kittylitter works scarcely anybody reported loved being eaten rattlesnake Actually sort dull such extra curricular aspects cant win em all. RO KWIK- FILL FUEL PUMP 4c- EI Du NEW CONCEPT IN FUEL PUMPS ONE MOVING PART NOTHING TO BREAK OR WEAR OUT ONLY $1A95 IL No191 iIiUrn LIGHT COMPACT AND RUGGED PUMP IS ONLY 2 WIDE AND 2-7/8 IN DIAMETER HAND OPERATED AND REVERSIBLE PUMPS IN AND OUT HIGH VOLUME FLOW ATTRACTIVE BLACK PUMP COMES ASSEMBLED AND MOUNTS ON GALLON CANS QUICK EASY INSTALLA TION PUMP COMES COMPLETE WITH STEEL MOUNTING BRACKETS HARDWARE AND FUEL TUBING DU-BRO PRODUCTS INCORPORATED 480 Banner Road Wauconda Illinois 60084 TANK FILTER Combination weight filter Designed fit clunk tanks Made sintered bronze give ultimate filtering No 16198c Tercel/Trostle continued page 31 little work small penalty weight models can made look good full-scale stunters tank shown large enough give engine run well over 8 mm may desire make tank rter keep engine run within 8-mm limit have measure fuel flying competition uniflow tank shown plans has given very satisfac tory performance flap/elevator movement ori ginal model first set up one-toone ratio During flight testing large flaps appeared create excessive drag during maneuvers flap/elevator movement changed two-tothree ratio shown plans works better flaps smaller deflec tions appear increase lift sufficiently square corners building up ex cessive drag original Tercel con structed adjustable elevator horn using Du-Bro Swiv-Link has worked satisfactorily after flights have found adjustable flap/eleva tor ratio elevator trim capability allows adjustments fine tuning can im prove flying characteristics stunt model balance point should further aft position shown plans model very sensitive balance point Ifyou arewantingto useyourmodel trainer learn stunt pattern funda mentals forward CG location recommended leadout positions shown plans satisfactory wind conditions would want fly though might want use some method adjust leadout positions have used Cox handle recom mend line spacing handle 1 less experi enced fliers line spacing 11/4 1 recommended Cox TD en gine 6-3 Cox gray prop running September 1976 79 kill FUEL TUBING Quality tubing Fuels High heat FEET specifically com pounded Gb resistant noncollapsible No 162 9cL Tercel continued mild fuel 10% nitro less 0008 diameter stranded lines up 52 ft can used cables available Sig Pylon cannot obtain lines dealer X-Cell Models Inc 347 Eastland Shopping Center Lexington KY 40505 can contacted prices availability Flying models new experience have booming horsepower larger competition models line tension considerably less However ro tational speed 45- 50-ft lines about same larger models Tercel can useful tool sharpen re conditions fuels exact ignition specifications particular glow plug Its easy-toread 0-10 amp ammeter shows precise power output will tell glance plug good engine flooded self-contained 2 volt battery may recharged over 150 times has fully charged rating 5 ampere hours peak power 200 watts circuitry safety fused 2 diameter highimpact polypropylene case has fluted base convenient han dling have add lead wires plug connector choice color-coded labeled terminals Buy GloBee Fire Plug hobby dealer today oy years fast reliable engine starts perfectly matched special requirements flexes its response very quick have yet looked up Ter cel male hawk particular pere grine falcon interested Control Line Precision Aerobatics want keep formed latest happenings competition scene should consider joining Precision Aerobatics Model Pilots Association dedicated promotion CL Precision Aerobatics Annual dues membership cludes monthly newsletter $600 care Wynn Paul 1630 Maywick Dr Lexington KY 40504 address Keith Trostle 10900 Phillips Dr Upper Marlboro MD 20870 DIVISION OF EMERSON ELECTRIC CO 6000 Fernview Ave Cincinnati Ohio 45212 RC Scale/Atkinson continued page 26 Using good pair gloves place butyrate sheet about 4 heating element slowly move back forth until plastic becomes pliable starts sag also should start smoke Im mediately remove heat lay over plug vise carefully center ing same time very firmly pull straight down over plug must done very quickly plastic will cool quickly around outer edges will distort form plug Hold several minutes cool let set about 10 mm until completely cooled Remove trim suit rea son canopy does come out right may reheat plastic sheet will slowly resume its original shape Its im portant its hot enough care should taken get too hot because canopy will distort clear may want try sample run before form ing canopy Trimming may painted use trim tape prepainted masking tape cut small strips three pictures show steps complete canopy items may formed manner such gun turrets gun bubbles lights etc time writing have just re turned 4th Annual Mint Julep R/C Meet Rough River Park Ken tucky has finest scale meets country Facilities superb Setting rolling hills north cen tral Kentucky lovely park lake facilities about 2500 ft black-top runway fly state Kentuckys Park Dept co-sponsor contest novelty itself certainly need help cooperation such parks governing bodies Kentucky Park Commission highly commended fine help further interest RC sport hobby flaw meet poor cooperation weather man rained off both Saturday Sun day Still flyable weather although wind little across runway Im afraid heavy rain cold weather Friday night may have kept some contest ants attending Although quan tity down quality evident both static flying attend ance three multi-engine stand-offs two Aerocommanders B-25 variety aircraft truly made up lower number scale models seen past years interesting innovations static turntable slowly rotated give judges really good look model table about 4 ft diameter stood about 2 ft ground gave judges chance see undercarriage plainly well underbelly model table could turned slowly use electric drill large dowel running turn 80 Model Aviation Fire Plug. optimum starting power need power source youll need years glow plug lights new GloBee Fire Plug GloBee Fire Plug igniterits completely inte grated glow plug starting system Its easy-to-operate rheostat con trol lever provides optimum current match weather I