Editors note Model helicopters have come long way time long ago controlled hovering flight real achievement As other modeling disciplines certain degree expertise has evolved along better equipment piloting skills However case nearly technical specialty experts can disagree two prominent model helicopter enthusiasts go Hoste tier Editor feel must sit down reply Helicopter column written Paul Tradelius September 1993 issue Model Aviation Mr Tradelius states computer radios have made helicopter setup much easier past couldnt agree However Paul goes state pitch curve helicopter should set up linear line starting point point must disagree Mr Tradelius Setting up initial pitch linear line wastes time does help final setup Instead initial pitch curve should setup according helicopter manufacturers recommendations will probably linear line fine tuning should done Let explain Lets say novice just learning fly has purchased Kyosho Concept 30 kit includes pitch degree gauge gives pitch curve recommendations 00 low pitch 60 hover half stick 100 top end pitch pitch angles want 60% throw bottom half stick movement 40% stick throw top half stick movement linear pitch Four degrees top end pitch divided 60 bottom end pitch gives ratio 66 novice should set 100% hi low pitch travel transmitter pitch endpoints check full pitch Concepts pitch slider slider position full down gives 100 pitch rotor blades should set half stick align servo arm 900 incoming collective pushrod rotate servo arm 11/2 splines forward process gives servo throw differential matches differential pitch requirements helicopterWith half stick still set novice should select middle holes servo arm adjust collective pushrod 60 pitch move stick bottom top checking 00 100 pitch respectively servo throw falls short 00 100 pitch collective arm should moved out hole servo arm reset 60 pitch half stick limits checked again Once bottom top pitch limits met slightly exceeded pilot can use pitch endpoints transmitter bring limits exactly 00 100 pitch Lets say pilot buys Concept 30 forward flight wants run 2o bottom pitch make descents out forward flight helicopter will still hover 60 pitch have 100 pitch top end setup gives 80 throw bottom half stick movement 40 throw top half stick movement farther away linear pitch first example Four divided 8 gives ratio 5 process same above except pilot should move arm forward two splines set 60 pitch hover check endpoints move Continued page 38 just received letter dated 13 August concerning opinions September helicopter column Model Aviation pleasure get letter because lets know people out really read material think about comments concern two parts column 1 technique adjusting pitch curve computer radio 2 using term angle attack vs pitch angle first point evidently confusing definition procedure technique everyday terms technique persons individual way accomplishing certain tasks procedure prescribed series steps must followed complete certain task As say letter. Paul goes state pitch curve helicopter should setup. Obviously operative word should implies technique vs word such must implies procedure must followed fully realize techniques may different part what makes helicopters enjoyable pilot has right use own techniques set blade pitch rotor speed engine needle-valve setting etc presenting different techniques pilot has choose may simply develop completely different technique However believe real reply first point seem have missed entire point article provide reader technique adjust computer radio set pitch curve Kyosho Concept 30 helicopter mention Much letter deals specific pitch settings adjusting servo arms servo throw differential personal techniques dealing particular helicopter setup Although certainly valid techniques subject article second point deals use angle attack vs pitch angle Although mention extensive flying experience itself either fixed-wing aircraft helicopters does make person expert aerodynamics However Bachelor Science degree Aeronautical Engineering University Oklahoma Master Science degree Engineering Management Southern Methodist University both make well qualified discuss subject Although technically correct angle attack should confused rotor blade pitch angle entire article deals helicopter setup static environment relative wind being present However further technically incorrect letter refer pitch angle angle incidence because angle incidence term used describe angle wing Continued page 38 January1994 11 Dear Ray [ Views/Hostetler Continued page 11 collective pushrod out servo arm necessary touch up endpoints transmitter Mr Tradelius goes explain set middle points pitch curve top bottom points arent 0 100 computer radios have five points adjust 0 25 50 75 100 25% 75% positions should used novice pilot As result 25% 75% positions should inhibited 25% point should simply set halfway between 0 50% point 75% point should set halfway between 50% 100% point 25% position can used aerobatic setup -4 -5 pitch low stick set 00 pitch time 75% position used full switchless inverted setup 75% position used adjust upright hover pitch helicopter hovers 3/o stick half stick set 0 degree main rotor pitch Last Mr Tradelius states Lets suppose put pitch gauge rotor blade determine low-end angle attack want obtained 10% high-end point 90%. Mr Tradelius extensive military civilian flying background should know angle attack exists rotor blades motion angle attack angle between incoming airflow relative wind chordline rotor blade Im sure meant say pitch angle angle incidence Both static measurements respect reference datum line datum line model helicopter level flybar pitch angle main rotor blade referenced Ray Hostetler Lakewood California ViewsITadeIius Continued page 11 permanently attached fuselage term angle incidence never used Basic Helicopter Handbook AC 61-13B Federal Aviation Administration Flight Standards Service appreciate concern keeping technically high writing standards present Model Aviation readers best possible material Please contact again may further help Paul Tradelius Fort Worth Texas RED MAX FUEL Order Form CALL OR USE THIS HANDY ORDER FORM TO SPEED YOUR ORDER FILL IN OTY ON THE LEFT THE TOTAL OH RIGHT Freight free qts gals No handling charge Freight collect drums Deduct 3% prepay Mix qty Total qty determines price SC orders add 5% sales tax Dealer club prices avail Accept credit cards checks COD.COD add $450 per carton uPS shipments add $600 per carton hazardous materials fee GlYFUELONE I4GALCASE 24GALtOGAL1GAL orderedMIXTUREGAL 5 GAL CAN PER GALPER GALPER GAL RED MAX PREMIUM FUEL fuel beginners & sport flyers should use Avail synthetiL castor olend RED MAXO102877175068961717365 RED MAX 5114585983676768722125 RED MAX 10129497094486777828140 RED MAX 121353101598890781230545 RED MAX iS14121059103194684732951 RED MAX RACING FUEL Trophy winner planes boats & cars Iwo boat blends csstor ok up 40% nltro RED MAX 201763132212871181105847145 RED MAX 251951146314241307117154774 RED MAX 402515188618361685150977604 RED MAX 502891216821101937173492824 RED MAX 60326724523852189196108044 RED MAX 6534552591252223152073115654 RED MAX 4-CYCLE FUEL Ellm4nates detonation & kickback 4-cycle engines smoother Idle power 10-4 CYCLE129497194586777728159 15-4 CYCLE1443 1082105396786634173 RED MAX HELICOPTER FUEL Extremely smooth running extra defoamer drk color special heavy oil helloplrs 10 Helicopter132399396688779429342 iSHelicopter14721104107498688335357 RED MAX PERFORMANCE FUEL High flash point heavy oIl use tuned pipes ducted fan & other heavy dty app S Performance11 758 8185878770523328 10 Performance 132399396688779429342 15 Performance 1472 1104107498688335357 RED MAX PATTERN FUEL Proven best fuel pattern engines using pumps tuned pipes S Pattern117588185878770523328 10 Pattern132399396688779429342 iSPattem1472 110410749868833535 SUPER TIGER 3000 FUEL Best fuel Super Tiger 2000-4000 engines Super Tiger 3000 12949 7094486777628140 RED MAX DIESEL FUEL SuperIor diesel back list popular demand ot customers BEARING TYPE BALL18081432139312791145 PLAIN20161540150113871253 CUSTOM BLENDED FUEL INGREDIENTS Grand Total Availsble type engine use Call price Mitt gailon boats cars helicopters speed pattern scale- 1/4 scale kavan iginilion 3000 Prices May Vary 38 Model Aviation r easy starting power smooth take offs power intricate maneuvers Red Max makes engine come alive power performance never expected can have power Its phone call away Power today next week next year Red Maxs secret ingredients keep engine last ing longer running power fully other 100% money back guaran tee com pletely sat isfied reason Red Max has power better idle 54 GAL TOTAL DRUM $AMT better wear char acteristics other fuel PLEASE PRINT Box CITY ISTATEIZIP
Edition: Model Aviation - 1994/01
Page Numbers: 11, 38
Editors note Model helicopters have come long way time long ago controlled hovering flight real achievement As other modeling disciplines certain degree expertise has evolved along better equipment piloting skills However case nearly technical specialty experts can disagree two prominent model helicopter enthusiasts go Hoste tier Editor feel must sit down reply Helicopter column written Paul Tradelius September 1993 issue Model Aviation Mr Tradelius states computer radios have made helicopter setup much easier past couldnt agree However Paul goes state pitch curve helicopter should set up linear line starting point point must disagree Mr Tradelius Setting up initial pitch linear line wastes time does help final setup Instead initial pitch curve should setup according helicopter manufacturers recommendations will probably linear line fine tuning should done Let explain Lets say novice just learning fly has purchased Kyosho Concept 30 kit includes pitch degree gauge gives pitch curve recommendations 00 low pitch 60 hover half stick 100 top end pitch pitch angles want 60% throw bottom half stick movement 40% stick throw top half stick movement linear pitch Four degrees top end pitch divided 60 bottom end pitch gives ratio 66 novice should set 100% hi low pitch travel transmitter pitch endpoints check full pitch Concepts pitch slider slider position full down gives 100 pitch rotor blades should set half stick align servo arm 900 incoming collective pushrod rotate servo arm 11/2 splines forward process gives servo throw differential matches differential pitch requirements helicopterWith half stick still set novice should select middle holes servo arm adjust collective pushrod 60 pitch move stick bottom top checking 00 100 pitch respectively servo throw falls short 00 100 pitch collective arm should moved out hole servo arm reset 60 pitch half stick limits checked again Once bottom top pitch limits met slightly exceeded pilot can use pitch endpoints transmitter bring limits exactly 00 100 pitch Lets say pilot buys Concept 30 forward flight wants run 2o bottom pitch make descents out forward flight helicopter will still hover 60 pitch have 100 pitch top end setup gives 80 throw bottom half stick movement 40 throw top half stick movement farther away linear pitch first example Four divided 8 gives ratio 5 process same above except pilot should move arm forward two splines set 60 pitch hover check endpoints move Continued page 38 just received letter dated 13 August concerning opinions September helicopter column Model Aviation pleasure get letter because lets know people out really read material think about comments concern two parts column 1 technique adjusting pitch curve computer radio 2 using term angle attack vs pitch angle first point evidently confusing definition procedure technique everyday terms technique persons individual way accomplishing certain tasks procedure prescribed series steps must followed complete certain task As say letter. Paul goes state pitch curve helicopter should setup. Obviously operative word should implies technique vs word such must implies procedure must followed fully realize techniques may different part what makes helicopters enjoyable pilot has right use own techniques set blade pitch rotor speed engine needle-valve setting etc presenting different techniques pilot has choose may simply develop completely different technique However believe real reply first point seem have missed entire point article provide reader technique adjust computer radio set pitch curve Kyosho Concept 30 helicopter mention Much letter deals specific pitch settings adjusting servo arms servo throw differential personal techniques dealing particular helicopter setup Although certainly valid techniques subject article second point deals use angle attack vs pitch angle Although mention extensive flying experience itself either fixed-wing aircraft helicopters does make person expert aerodynamics However Bachelor Science degree Aeronautical Engineering University Oklahoma Master Science degree Engineering Management Southern Methodist University both make well qualified discuss subject Although technically correct angle attack should confused rotor blade pitch angle entire article deals helicopter setup static environment relative wind being present However further technically incorrect letter refer pitch angle angle incidence because angle incidence term used describe angle wing Continued page 38 January1994 11 Dear Ray [ Views/Hostetler Continued page 11 collective pushrod out servo arm necessary touch up endpoints transmitter Mr Tradelius goes explain set middle points pitch curve top bottom points arent 0 100 computer radios have five points adjust 0 25 50 75 100 25% 75% positions should used novice pilot As result 25% 75% positions should inhibited 25% point should simply set halfway between 0 50% point 75% point should set halfway between 50% 100% point 25% position can used aerobatic setup -4 -5 pitch low stick set 00 pitch time 75% position used full switchless inverted setup 75% position used adjust upright hover pitch helicopter hovers 3/o stick half stick set 0 degree main rotor pitch Last Mr Tradelius states Lets suppose put pitch gauge rotor blade determine low-end angle attack want obtained 10% high-end point 90%. Mr Tradelius extensive military civilian flying background should know angle attack exists rotor blades motion angle attack angle between incoming airflow relative wind chordline rotor blade Im sure meant say pitch angle angle incidence Both static measurements respect reference datum line datum line model helicopter level flybar pitch angle main rotor blade referenced Ray Hostetler Lakewood California ViewsITadeIius Continued page 11 permanently attached fuselage term angle incidence never used Basic Helicopter Handbook AC 61-13B Federal Aviation Administration Flight Standards Service appreciate concern keeping technically high writing standards present Model Aviation readers best possible material Please contact again may further help Paul Tradelius Fort Worth Texas RED MAX FUEL Order Form CALL OR USE THIS HANDY ORDER FORM TO SPEED YOUR ORDER FILL IN OTY ON THE LEFT THE TOTAL OH RIGHT Freight free qts gals No handling charge Freight collect drums Deduct 3% prepay Mix qty Total qty determines price SC orders add 5% sales tax Dealer club prices avail Accept credit cards checks COD.COD add $450 per carton uPS shipments add $600 per carton hazardous materials fee GlYFUELONE I4GALCASE 24GALtOGAL1GAL orderedMIXTUREGAL 5 GAL CAN PER GALPER GALPER GAL RED MAX PREMIUM FUEL fuel beginners & sport flyers should use Avail synthetiL castor olend RED MAXO102877175068961717365 RED MAX 5114585983676768722125 RED MAX 10129497094486777828140 RED MAX 121353101598890781230545 RED MAX iS14121059103194684732951 RED MAX RACING FUEL Trophy winner planes boats & cars Iwo boat blends csstor ok up 40% nltro RED MAX 201763132212871181105847145 RED MAX 251951146314241307117154774 RED MAX 402515188618361685150977604 RED MAX 502891216821101937173492824 RED MAX 60326724523852189196108044 RED MAX 6534552591252223152073115654 RED MAX 4-CYCLE FUEL Ellm4nates detonation & kickback 4-cycle engines smoother Idle power 10-4 CYCLE129497194586777728159 15-4 CYCLE1443 1082105396786634173 RED MAX HELICOPTER FUEL Extremely smooth running extra defoamer drk color special heavy oil helloplrs 10 Helicopter132399396688779429342 iSHelicopter14721104107498688335357 RED MAX PERFORMANCE FUEL High flash point heavy oIl use tuned pipes ducted fan & other heavy dty app S Performance11 758 8185878770523328 10 Performance 132399396688779429342 15 Performance 1472 1104107498688335357 RED MAX PATTERN FUEL Proven best fuel pattern engines using pumps tuned pipes S Pattern117588185878770523328 10 Pattern132399396688779429342 iSPattem1472 110410749868833535 SUPER TIGER 3000 FUEL Best fuel Super Tiger 2000-4000 engines Super Tiger 3000 12949 7094486777628140 RED MAX DIESEL FUEL SuperIor diesel back list popular demand ot customers BEARING TYPE BALL18081432139312791145 PLAIN20161540150113871253 CUSTOM BLENDED FUEL INGREDIENTS Grand Total Availsble type engine use Call price Mitt gailon boats cars helicopters speed pattern scale- 1/4 scale kavan iginilion 3000 Prices May Vary 38 Model Aviation r easy starting power smooth take offs power intricate maneuvers Red Max makes engine come alive power performance never expected can have power Its phone call away Power today next week next year Red Maxs secret ingredients keep engine last ing longer running power fully other 100% money back guaran tee com pletely sat isfied reason Red Max has power better idle 54 GAL TOTAL DRUM $AMT better wear char acteristics other fuel PLEASE PRINT Box CITY ISTATEIZIP