NOW THAT Carrier fliers have some experience under revised scoring sys tem becoming easier associate high- low-speed performance corresponding flight score confusion apparent beginning year has diminished considerably have reviewing Carrier scores Carrier contests year have seen scores reported 001 point Much result old habits some concern change 01 point scoring loss ac curacy might create some problems determining placing particularly flight scores being closer together have seen no duplicate scores yet through midJune possibility does exist would like hear views resolving ties occur weakest link scoring system stopwatch thumb starts stops 1/10 second watch timing 1/2 mile can determine speeds within about 1/2 mph during high speed portion Carrier flight 02 second variation allowed rule book high speed 04 second variation low errors become greater fact allowable errors normal Carrier flight can result score variations over 2 points problem problem has existed long has Navy Carrier event would much prefer having occasional draw winning losing contest few hun dredths point errors order whole point built system reason mentioning point out need consistency judging event Event directors should make effort have same timers use same watches timing flights enough problems varia tions caused differences watches timers FLAPS previous columns have dis cussed subject flaps Navy Car rier models general believe flaps can useful scale models relatively high wing loadings flaps really necessary Profile Carrier models large wings light weight Flaps work increasing camber airfoil thereby allowing greater maximum lift coefficient before th airfoil stalls addition increasing maximum lift coefficient flaps also increase drag probably useful point considering flaps Profile model increased drag caused flaps requires higher power setting increased air flow prop increases elevator effectiveness improves control response near stall varieties flaps Some require complicated mechanisms cause move back down out wing before starting deflect Fowler Youngman Others slotted open slots continued page 94 Navy Carrier Richard L Peny October1976 35 J J Mangino ST 35powered Profile Carrier model Its particularly functional straight forward ship Always encouraging see Junior fliers event Ted Kraver pic PLAIN FLAP SPLIT FLAP SLOTTED FLAP FOWLER FLAP SLOTTED FOWLER FLAP a,, Stearman C3BGEHERALTb 9 sopt /READY OR N W NWE________ DO GEGN SNOBDA 35 RBIOSOON.04S POWERFOR RADIO CONTROL OR FREE FLIGHT00010 POWES C SIT OF NOSTALGIA FOR 0000 CORONAL UF TO THREE CHANNELSONE OF THE GOLDEN ERAS AREATEST AIRCRAFTGAo 0 oDLIGHT TO BUILD HISTORO BAXEN flOOBE WORLD N N~SONS AMERICAN FOWEB FORV PIPIR Cl/i N 01 CONTROL UP TO OTHEE SO WINGSPAN 000 POWER FOR FREE 9N SNELS TRUE CLASSIC A15 FLIWOD OR R*01D CONTROL E1OOt0BLO FROG THE GOLDEN CR0 7FOR CDNTRCL UNITS CAN BE FLORN PSEE FLIHOT OS POWER ON RUBBEROS DIRECT ORDERS ADD lOX FAN TACKING ANDFLY LINE MODELS BOOR D0E 00 RESICESOC ADD Ha ODD SEE YOUR LOCAL HOBBY DEALER0643 ASHBY PL PAIREAX VA22030 FF Duration/Meuser continued page 43 ing liquid onto wood Let dry sand apply coats urethane varnish Let dry wet sand Alterna tively styrofoam can dipped dope thinner immediately rubbed wood styrofoam film suppose polystyrene film eb chemists hard tough urethane varnish gives relatively chemically impervious barrier almost paint resin coating may applied Enamelthe exception know ofdoesnt adhere very well No shrinkage man says Other Hints Tips Again Squire Openshaw AAEthanol excellent raising grain balsa dries quickly caused practically no warpage might try methanol too per haps water-alcohol mix such rubbing alcohol Vodka ADWaterdiluted White Magic vinyl floor polish seems promising sealant Japanese tissue would have thought Bob Meuser 4200 Gregory St Oak land CA 94619 ADVERTISERS INDEX Ace Radio Control Inc79 Andrews Aircraft Model Co89 David Andrews CoCover 2 Cox Hobbies4849 96 Cover 3 Cumberland Press86 Du-Bro Products Inc85 EK-logictrol87 Flyline Models94 Carl Goldberg Models20 Grish Brothers92 Peck-Polymers81 Progress Mfg Company91 RCBuyersGuide93 RSSystems81 SC Modeler Hobby Shop83 Sig Mfg Company1 Sterling Models Inc90 VI Products86 Williams Brothers91 World EnginesBack Cover CL Navy Carrier/Perry continued page 35 between wing flap cause higher-pressure air bend airflow around upper surface flaps increase effectiveness part such flaps suited Carrier models because too heavy too complicated too critical design provide small improve ment over much simpler plain flaps split flaps lend themselves very well modeling applications plain flap commonly used flap design Carrier models made cutting off last 20% airfoil section mounting hinges sheet flaps common Stunt models also plain flaps Plain flaps usually used Carrier models prototype aircraft employed slotted flaps Fowler flaps some other type complicated motions Plain flaps ap propriate time flap outlines visible upper surface wing flap/ wing separation can canted upper wing surface extended thin plywood cases separation lines top bottom wing slightly different positions slotted flap installations Split flaps used carrier aircraft among Grumman Avenger Wildcat Douglas Daunt less Devastator North Amer ican Texan trained Navy pilots split flap made hinging bottom surface wing trailing edge split flap deflected upper surface wing does move Plain flaps split flaps have very simi lar effects lift drag given airfoil plain flaps tend have slightly drag split flaps no real advantage using either type thin trailing edge flap sections split flaps can cause some warping problems dope used finishing nonshrinking finish can used eliminate problem have heard some disturbing reports some builders enlarging split flaps well yond proper scale outlines claiming legality because flaps visible top view wing Besides being obvious violation intent rule see being hidden exempts flaps requirement scale topview outlines stated rule bonus points Ignoring flap outlines hid den top view equivalent saying Guardian doesnt need right auxiliary vertical stabilizer because visible left side view submitted scale verification Whatever personal interpretation legality enlarged split flaps let discourage attempting such installation another reasonthey dont work Split flaps larger about 20% wing chord increase maximum lift coefficient thin sec tions used Carrier models fact 10% thick wing large flap actually less effective small About added enlarging split flaps beyond proper scale dimensions weight Once rush Nats preparations has passed plan run product evaluations Fox Profile Carrier Special engine G-S Products Bearcat Kit Pro file Carrier have number en quiries both products Richard L Perry 5016 ngelita Ave Dayton OH 45424 CL World Champs/Johnson continued page 19 second round Everything looked OK qualifying shot motor ADcookedS bit during some heavy traffic motor became balky pit required extra dose flipping third American team Jolly/Kusik couldnt improve first-round time fact having trouble flight past year split fuel line caused engine sputter cause run-in final very exciting though Danish team broke model first pit Russian pilot used two fouls whip over Swedish team proved enough margin pull out win race close trailing another past segment lap counting lights flashed same instant Later banquet found out Larsson-Rylins engine oversize tiny amount Rossi 15s come oversize factory happened un fortunately disqualified cause fast heat time third place award given Russian team Onufrienko-Shapovalov 402 heat time Austrians awarded prize top team Team Race basis fast heat times 94 Model Aviation
Edition: Model Aviation - 1976/10
Page Numbers: 35, 94
NOW THAT Carrier fliers have some experience under revised scoring sys tem becoming easier associate high- low-speed performance corresponding flight score confusion apparent beginning year has diminished considerably have reviewing Carrier scores Carrier contests year have seen scores reported 001 point Much result old habits some concern change 01 point scoring loss ac curacy might create some problems determining placing particularly flight scores being closer together have seen no duplicate scores yet through midJune possibility does exist would like hear views resolving ties occur weakest link scoring system stopwatch thumb starts stops 1/10 second watch timing 1/2 mile can determine speeds within about 1/2 mph during high speed portion Carrier flight 02 second variation allowed rule book high speed 04 second variation low errors become greater fact allowable errors normal Carrier flight can result score variations over 2 points problem problem has existed long has Navy Carrier event would much prefer having occasional draw winning losing contest few hun dredths point errors order whole point built system reason mentioning point out need consistency judging event Event directors should make effort have same timers use same watches timing flights enough problems varia tions caused differences watches timers FLAPS previous columns have dis cussed subject flaps Navy Car rier models general believe flaps can useful scale models relatively high wing loadings flaps really necessary Profile Carrier models large wings light weight Flaps work increasing camber airfoil thereby allowing greater maximum lift coefficient before th airfoil stalls addition increasing maximum lift coefficient flaps also increase drag probably useful point considering flaps Profile model increased drag caused flaps requires higher power setting increased air flow prop increases elevator effectiveness improves control response near stall varieties flaps Some require complicated mechanisms cause move back down out wing before starting deflect Fowler Youngman Others slotted open slots continued page 94 Navy Carrier Richard L Peny October1976 35 J J Mangino ST 35powered Profile Carrier model Its particularly functional straight forward ship Always encouraging see Junior fliers event Ted Kraver pic PLAIN FLAP SPLIT FLAP SLOTTED FLAP FOWLER FLAP SLOTTED FOWLER FLAP a,, Stearman C3BGEHERALTb 9 sopt /READY OR N W NWE________ DO GEGN SNOBDA 35 RBIOSOON.04S POWERFOR RADIO CONTROL OR FREE FLIGHT00010 POWES C SIT OF NOSTALGIA FOR 0000 CORONAL UF TO THREE CHANNELSONE OF THE GOLDEN ERAS AREATEST AIRCRAFTGAo 0 oDLIGHT TO BUILD HISTORO BAXEN flOOBE WORLD N N~SONS AMERICAN FOWEB FORV PIPIR Cl/i N 01 CONTROL UP TO OTHEE SO WINGSPAN 000 POWER FOR FREE 9N SNELS TRUE CLASSIC A15 FLIWOD OR R*01D CONTROL E1OOt0BLO FROG THE GOLDEN CR0 7FOR CDNTRCL UNITS CAN BE FLORN PSEE FLIHOT OS POWER ON RUBBEROS DIRECT ORDERS ADD lOX FAN TACKING ANDFLY LINE MODELS BOOR D0E 00 RESICESOC ADD Ha ODD SEE YOUR LOCAL HOBBY DEALER0643 ASHBY PL PAIREAX VA22030 FF Duration/Meuser continued page 43 ing liquid onto wood Let dry sand apply coats urethane varnish Let dry wet sand Alterna tively styrofoam can dipped dope thinner immediately rubbed wood styrofoam film suppose polystyrene film eb chemists hard tough urethane varnish gives relatively chemically impervious barrier almost paint resin coating may applied Enamelthe exception know ofdoesnt adhere very well No shrinkage man says Other Hints Tips Again Squire Openshaw AAEthanol excellent raising grain balsa dries quickly caused practically no warpage might try methanol too per haps water-alcohol mix such rubbing alcohol Vodka ADWaterdiluted White Magic vinyl floor polish seems promising sealant Japanese tissue would have thought Bob Meuser 4200 Gregory St Oak land CA 94619 ADVERTISERS INDEX Ace Radio Control Inc79 Andrews Aircraft Model Co89 David Andrews CoCover 2 Cox Hobbies4849 96 Cover 3 Cumberland Press86 Du-Bro Products Inc85 EK-logictrol87 Flyline Models94 Carl Goldberg Models20 Grish Brothers92 Peck-Polymers81 Progress Mfg Company91 RCBuyersGuide93 RSSystems81 SC Modeler Hobby Shop83 Sig Mfg Company1 Sterling Models Inc90 VI Products86 Williams Brothers91 World EnginesBack Cover CL Navy Carrier/Perry continued page 35 between wing flap cause higher-pressure air bend airflow around upper surface flaps increase effectiveness part such flaps suited Carrier models because too heavy too complicated too critical design provide small improve ment over much simpler plain flaps split flaps lend themselves very well modeling applications plain flap commonly used flap design Carrier models made cutting off last 20% airfoil section mounting hinges sheet flaps common Stunt models also plain flaps Plain flaps usually used Carrier models prototype aircraft employed slotted flaps Fowler flaps some other type complicated motions Plain flaps ap propriate time flap outlines visible upper surface wing flap/ wing separation can canted upper wing surface extended thin plywood cases separation lines top bottom wing slightly different positions slotted flap installations Split flaps used carrier aircraft among Grumman Avenger Wildcat Douglas Daunt less Devastator North Amer ican Texan trained Navy pilots split flap made hinging bottom surface wing trailing edge split flap deflected upper surface wing does move Plain flaps split flaps have very simi lar effects lift drag given airfoil plain flaps tend have slightly drag split flaps no real advantage using either type thin trailing edge flap sections split flaps can cause some warping problems dope used finishing nonshrinking finish can used eliminate problem have heard some disturbing reports some builders enlarging split flaps well yond proper scale outlines claiming legality because flaps visible top view wing Besides being obvious violation intent rule see being hidden exempts flaps requirement scale topview outlines stated rule bonus points Ignoring flap outlines hid den top view equivalent saying Guardian doesnt need right auxiliary vertical stabilizer because visible left side view submitted scale verification Whatever personal interpretation legality enlarged split flaps let discourage attempting such installation another reasonthey dont work Split flaps larger about 20% wing chord increase maximum lift coefficient thin sec tions used Carrier models fact 10% thick wing large flap actually less effective small About added enlarging split flaps beyond proper scale dimensions weight Once rush Nats preparations has passed plan run product evaluations Fox Profile Carrier Special engine G-S Products Bearcat Kit Pro file Carrier have number en quiries both products Richard L Perry 5016 ngelita Ave Dayton OH 45424 CL World Champs/Johnson continued page 19 second round Everything looked OK qualifying shot motor ADcookedS bit during some heavy traffic motor became balky pit required extra dose flipping third American team Jolly/Kusik couldnt improve first-round time fact having trouble flight past year split fuel line caused engine sputter cause run-in final very exciting though Danish team broke model first pit Russian pilot used two fouls whip over Swedish team proved enough margin pull out win race close trailing another past segment lap counting lights flashed same instant Later banquet found out Larsson-Rylins engine oversize tiny amount Rossi 15s come oversize factory happened un fortunately disqualified cause fast heat time third place award given Russian team Onufrienko-Shapovalov 402 heat time Austrians awarded prize top team Team Race basis fast heat times 94 Model Aviation