Radio Control HELICOPTERS Larry Jolly IF youre thumbing through pages look ing Dave Chesneys column Im afraid youll have settle words instead Dave has decided time relinquish reins another scribe Im sure wasnt easy decision Dave hope can continue column same stan dard interest achieved think speak us Dave faithful reader thank job well done Before start journey through printed pages d like introduce myself describe intent what hope achieve writing Model Aviation name Larry Jolly am 29 years old am native Californian born modeling family result have active hobby quite early age have flying model Helicopters al six years own type RC Helicopter endeavor stay current flying different types machines possible believe flying different models can achieve enough experience intelligently discuss pros cons machine being evaluated During course writing arti cles will undoubtedly called upon discuss review various Helicopters want make something very clear now no mistakes hurt feelings later asked review product will hon estly will state opinions views will influenced experience machine question have nevernor intend tomade penny selling model Helicopters intend write monthly column will interest majority audience will make contest re port because experience has average chopper pilot far inter ested getting machine handle little better reading about latest Hot Shots contest success will occasion ally print some information full-size ro torcraft believe also interested machines still lets talk about months pictures before run out space first taken few years ago nearby Costa Mesa CA Thats trying figure out control system one-man contra-rotating helicopter Appar ently machine four others like built 1952 possible rescue ve hicles pilots downed behind enemy lines aluminum monocoque construction hardwood rotor blades powered 50 hp two-cycle engine impres sion curious little machine really blown-up Du-Bro 505 Whirley Bird reader has information regarding helicopter Id certainly interested hearing second photo family album Thats firing up long-distance Continued page 150 October 1983 53 Whats thisa Giant Scale RC Helicopter No Author Larry Jolly examining prototypes real man-carrying chopper made around 1952 intended rescuing military pilots trapped behind enemy lines info column Its April 1980 Larry about fly Heliboy Catalina Island Long Beach Convention Centernonstop across 30 miles open ocean Ernie Huber hovers Kavan Jet Ranger MACS show Expertise makes look easy NOW PRODUCED IN THE US ANOTHER GIANT FROM J-5 tough TORNADO 4 feet speed stability TORNADO loves rough water handling best time paint clear air clean just little damp usually no wind plane has whole day dry before come back fondle After drying day clear coat just about bulletproof Go ahead put radio engine silicone wing saddle fly thing have lots questions about go about fading colors Ill take some time go over color-fading techniques Fading probably easiest way striking paint jobbut can also create total mess painters try fade colors too far away other spectrum come out looking like forgot piece masking tape tf going try fading colors should use shades close another Dark/light same color works best colors next another color wheel Always shoot colors together little drying time possible Always fade lightest color over dark always hold airbrush overspray goes back color spraying Again biggest secret fading know ing quit hope series articles has given some points painting did know before way way paint has successful thanks Gary MePike tips finishing Pylon Racer See next month Bill Hager 706 Glen Haven Dr Conroe TX 77302 RC Helicopters/Jolly Continued page 53 timately land Long Beach Convention Center Model Aviation carried story August 1980 issue might want particulars third picture Master Ernie Huber hovering Kavan Jet Ranger verted audiences past MACS show love watch someone Ernies talent fly gives rest us something shoot know can have lot fun articles participate Unlike other editors may have ended columns saying Please send information can have something present month Ill put slightly different way Id like send pictures information might have something column dont youll have listen month because will have column blank space used So until next time keep landing rotor blades up Larry Jolly 5501 W Como Santa Ana CA 92703 Airplane Design/Powers Continued paoe 55 15 The weight power speed etc Scale model have real relationship weight power speed etc full-scale prototype a True b False 16The equation lift LCLqS a This abstruse formula no practical value b A half-hours study equa tion will give modeler very useful tool use designing own models 17 Swept highly-tapered wings should have a Washout b Washin 18 Reynolds Number has a Size b Speed c Viscosity d Density e Drag 19 In level flight horizontal tail nor mally carries a An up load lift aft portion airplane b A down load keep nose up c No load because stabilizers have zero incidence 20 On full-size airplanes wing set some angle incidence yet models have wing set zero incidence a Therefore incidence neces sary b If both wing stabilizer set zero incidence airplane will fly up elevator Answers Discussion b tail-dragger arrangement herently unstable because main wheels ahead CG Tail wheels skids provide degree stability very effective because very lightly loaded up off ground almost immediately takeoff main wheels should toed-in As shown Fig airplane begins yaw usually left because propeller torque drag left wheel combines greater moment arm does right wheel its smaller arm B thus producing net mo ment tending increase yaw left cause ground loop toeing-in wheels drag left wheel reduced right wheel increased has effect increasing favorable restoring moment right wheel decreasing adverse moment left wheel can seen under no circumstances should main wheels ever toed-out 2bTorque Propeller torque can con siderable low speed loads up left wheel unloads right wheel causing airplane want turn left should countered application right rud der well toe-in mentioned above Ap plication ailerons counter torque takeoff can induce stall snap roll future article 3b no such thing P-factor described difference angle attack between ascending left pro peller blade descending right blade line flight high angles attack near stall same thrust line prop shown Fig 2 As shown Fig 3 propeller spinning moderately fast tends equalize flow pressure across its diameter disparity angle attack between ascending descending blades equal ized small imbalance between lift blade compared other can cause destructive vibration fixed-pitch propeller 150 Model Aviation Mahogany Plywood Boat Kit Designed Industrial Quadra other 2 cycle engines S 1795 KIT & DRIVE TRAIN $14950 Super offshore Deep V KIT DRIVE TRAIN & ENGINE $26950 Shipping charges included US Canada J- S ENTERPRISES 256 Schuman Dr Newmarket Alabama 35761 Phone 1 -205-852-2566 PO Box 82 Belmont Ontario NOL i Ba Phone 151 9-644-0375 FULL5iZE PLANS Heliboy looking real hard 30 miles open water between sit ting Catalina Island will ul
Edition: Model Aviation - 1983/10
Page Numbers: 53, 150
Radio Control HELICOPTERS Larry Jolly IF youre thumbing through pages look ing Dave Chesneys column Im afraid youll have settle words instead Dave has decided time relinquish reins another scribe Im sure wasnt easy decision Dave hope can continue column same stan dard interest achieved think speak us Dave faithful reader thank job well done Before start journey through printed pages d like introduce myself describe intent what hope achieve writing Model Aviation name Larry Jolly am 29 years old am native Californian born modeling family result have active hobby quite early age have flying model Helicopters al six years own type RC Helicopter endeavor stay current flying different types machines possible believe flying different models can achieve enough experience intelligently discuss pros cons machine being evaluated During course writing arti cles will undoubtedly called upon discuss review various Helicopters want make something very clear now no mistakes hurt feelings later asked review product will hon estly will state opinions views will influenced experience machine question have nevernor intend tomade penny selling model Helicopters intend write monthly column will interest majority audience will make contest re port because experience has average chopper pilot far inter ested getting machine handle little better reading about latest Hot Shots contest success will occasion ally print some information full-size ro torcraft believe also interested machines still lets talk about months pictures before run out space first taken few years ago nearby Costa Mesa CA Thats trying figure out control system one-man contra-rotating helicopter Appar ently machine four others like built 1952 possible rescue ve hicles pilots downed behind enemy lines aluminum monocoque construction hardwood rotor blades powered 50 hp two-cycle engine impres sion curious little machine really blown-up Du-Bro 505 Whirley Bird reader has information regarding helicopter Id certainly interested hearing second photo family album Thats firing up long-distance Continued page 150 October 1983 53 Whats thisa Giant Scale RC Helicopter No Author Larry Jolly examining prototypes real man-carrying chopper made around 1952 intended rescuing military pilots trapped behind enemy lines info column Its April 1980 Larry about fly Heliboy Catalina Island Long Beach Convention Centernonstop across 30 miles open ocean Ernie Huber hovers Kavan Jet Ranger MACS show Expertise makes look easy NOW PRODUCED IN THE US ANOTHER GIANT FROM J-5 tough TORNADO 4 feet speed stability TORNADO loves rough water handling best time paint clear air clean just little damp usually no wind plane has whole day dry before come back fondle After drying day clear coat just about bulletproof Go ahead put radio engine silicone wing saddle fly thing have lots questions about go about fading colors Ill take some time go over color-fading techniques Fading probably easiest way striking paint jobbut can also create total mess painters try fade colors too far away other spectrum come out looking like forgot piece masking tape tf going try fading colors should use shades close another Dark/light same color works best colors next another color wheel Always shoot colors together little drying time possible Always fade lightest color over dark always hold airbrush overspray goes back color spraying Again biggest secret fading know ing quit hope series articles has given some points painting did know before way way paint has successful thanks Gary MePike tips finishing Pylon Racer See next month Bill Hager 706 Glen Haven Dr Conroe TX 77302 RC Helicopters/Jolly Continued page 53 timately land Long Beach Convention Center Model Aviation carried story August 1980 issue might want particulars third picture Master Ernie Huber hovering Kavan Jet Ranger verted audiences past MACS show love watch someone Ernies talent fly gives rest us something shoot know can have lot fun articles participate Unlike other editors may have ended columns saying Please send information can have something present month Ill put slightly different way Id like send pictures information might have something column dont youll have listen month because will have column blank space used So until next time keep landing rotor blades up Larry Jolly 5501 W Como Santa Ana CA 92703 Airplane Design/Powers Continued paoe 55 15 The weight power speed etc Scale model have real relationship weight power speed etc full-scale prototype a True b False 16The equation lift LCLqS a This abstruse formula no practical value b A half-hours study equa tion will give modeler very useful tool use designing own models 17 Swept highly-tapered wings should have a Washout b Washin 18 Reynolds Number has a Size b Speed c Viscosity d Density e Drag 19 In level flight horizontal tail nor mally carries a An up load lift aft portion airplane b A down load keep nose up c No load because stabilizers have zero incidence 20 On full-size airplanes wing set some angle incidence yet models have wing set zero incidence a Therefore incidence neces sary b If both wing stabilizer set zero incidence airplane will fly up elevator Answers Discussion b tail-dragger arrangement herently unstable because main wheels ahead CG Tail wheels skids provide degree stability very effective because very lightly loaded up off ground almost immediately takeoff main wheels should toed-in As shown Fig airplane begins yaw usually left because propeller torque drag left wheel combines greater moment arm does right wheel its smaller arm B thus producing net mo ment tending increase yaw left cause ground loop toeing-in wheels drag left wheel reduced right wheel increased has effect increasing favorable restoring moment right wheel decreasing adverse moment left wheel can seen under no circumstances should main wheels ever toed-out 2bTorque Propeller torque can con siderable low speed loads up left wheel unloads right wheel causing airplane want turn left should countered application right rud der well toe-in mentioned above Ap plication ailerons counter torque takeoff can induce stall snap roll future article 3b no such thing P-factor described difference angle attack between ascending left pro peller blade descending right blade line flight high angles attack near stall same thrust line prop shown Fig 2 As shown Fig 3 propeller spinning moderately fast tends equalize flow pressure across its diameter disparity angle attack between ascending descending blades equal ized small imbalance between lift blade compared other can cause destructive vibration fixed-pitch propeller 150 Model Aviation Mahogany Plywood Boat Kit Designed Industrial Quadra other 2 cycle engines S 1795 KIT & DRIVE TRAIN $14950 Super offshore Deep V KIT DRIVE TRAIN & ENGINE $26950 Shipping charges included US Canada J- S ENTERPRISES 256 Schuman Dr Newmarket Alabama 35761 Phone 1 -205-852-2566 PO Box 82 Belmont Ontario NOL i Ba Phone 151 9-644-0375 FULL5iZE PLANS Heliboy looking real hard 30 miles open water between sit ting Catalina Island will ul