Radio Control Sport/ Aerobatics Ron Van Putte RECENTLY received copy new book about radio control Kaimbach Publish ing Company Its called Getting Most Radio Control Systems author Fred Marks Does Fred Marks name ring bell about Ace Silver Seven Fred guiding force behind Silver Seven electronic products Ace sells Freds book quite different books RC treat transmitter receiver servos black boxes make things work mysterious wonderful ways Fred explains basic system components work manner people can understand approach same electronics engin eer would use simply because Fred aero nautical engineer trade developed expertise RC because interest hobby hes very succesful chapters Marks book read like wish list RC-oriented items us would benefit knowing about Besides de scribing basic system components work chapters discuss building RC components kits system maintenance component trouble-shooting repair installa don equipment RC accessories like chargers expanded scale voltmeters chapter super systems work Since costs $895 lot RCers will get back times over performing simple component troubleshooting repair Its probably available local bookstore hobby shop received interesting letter Chuck Nourcier Lake Charles LA such general interest excerpt follows have discovered something interesting yaw problems 40-sized Pattern airplane friend Nat Penten suggested putting tips wing after some experimenting found Out correct rolling rudder piece 1/32 1/16 plywood glued angle between 3Q0 400 measued plane wing 00 would parallel wing 900 would perpendicular wing Angling tips up caused rolling effect same direction yaw give right rudder plane would roll right angling tips down get opposite effect tips very big about 3 4 wide length chord trimmed get desired effect Now something else think about same guy designed built flying wing Probably same picture Nats coverage R VP mounted dorsal fin above canopy caused airplane roll Both effects can explained fairly opposite direction yaw Right rudder easily First tips modify dihedral effect caused airplane roll left Explain wing Most people realize usually onewing dihedral makes airplane roll P\VF LyJ FIGURE 1 F FIGURE2 some models bank left give right rudder Ron talks about month 42 Model Aviation Heres Rons completed Ace Silver Seven encoder mainframe trim adjust board upper left mixer board upper right mixer board plugs transmitter trim adjust board would normally go Theres lot wiring yet project rudder deflected Thats airplanes ailerons have substantially dihedral wings have ailerons However Pattern airplane too little too much dihedral can problem pure yaw needed airplane rolls rudder deflection get sloppy Stall Turn FourPoint Roll Eight-Point Roll Knife-Edge Flight etc Pattern fliers cut wing half change dihedral rudder deflection gives yaw effects tip plates installed tips above plane wing tips will increase wing dihedral effect course converse true So put Pattern airplane level flight condition put right rudder airplane rolls right either less dihedral needed tip plates should installed tip below plane wing vice versa Tip plates can used rudder-only airplanes get dihedral effect wing doesnt have enough certainly beats cutting wing half putting back together again get proper dihedral angle Try it works Now what about flying wing rolled left right rudder given kind reaction usually noted airplanes short fuselages very large vertical fins problem caused way yawing moment gener ated want nose airplane yaw right rudder must moved right causes airflow about vertical fin deflected right generating forces left vertical fin effect incremental forces vertical fin added up d see could replace incre mental forces acting over fin force acting about third way up bottom Figure 1 about halfway back fin leading edge bottom Figure 2 point called aerodynamic center vertical fin can look effect force vertical fin two ways expect multiplying force times distance tail aerodynamic center airplane center mass yawing moment causes nose airplane move right However multiply force times distance tail aerodynamic center above fuselage axis get rolling moment tends roll airplane counterclockwise Now airplanes dont yaw right roll left same timeso Wing dihedral causes opposing yawing moment generated direction rudder moved right rudder produces clockwise rolling moment sufficient Continued page 108 THINK FOX N N Weve Got #6006Cone oaSpne 0200 6601071 Conventional Spinner 1300 660108 2 Conoentional Spinner1400 86010927 Conoenlional Spinner1500 #601 tO 24 Conventional Spinner 1600 #602061 Jon Spinne$1300 #602071 4 Olin Jin Spinner1400 A#60208 2 Siin 1mm Spinner1000 #60209 24 Olin Jin Spinner1600 #60210 2 Olin Jin Spinne1700 6603061 cal Spinner $1200 {#603071 4 Conical Spinne1300 #60300 2 Conical Spinnet1400 #603092/ Conical Spinner 1004 #603102/ Conical Spinne 1600 FOX POLISHED SPINNERS SPINNER NUTS Offered nt Three Altreclt e Styles #60503 1032 Sp nne Net$200 Conventtonal Slim Jim / Conical#60004 1 4 Sp nne Not220 Support Hardware 12 Volt Glow Plugs Dry cell Nickel Cad 2 Volt Glow Plugs Lead-Acid Battery THE FOX GLOW PLUGS #40101 Standard Short0119 each#40103 Standard Short0119 #40201 Standard Longll9each#dS2O3Standard Long119 nach #40502 SIC Short 169 each#40503 RIC Short 1O9each #40002 SIC Long 109each#40603 SIC Long169 #70201 FOX 4vtvp Reamer 670202 FOX KOB Roamer formostoorpoves0600 KOB Shalt vices $695 FOX PROP REA MERSFOUR-WAY & FOX ENGINE MOUNTS-#OO2lOEngineMount10000800 #50203 Engine Mount 1135 000 #50204 Engine MOunt 1217800 Enlarge Prop Shaft Holes larger sizesTWOWAYRugged Machived trom Bar Stock#50401 Engine Mount 1217900 #00402 Engine Mount1201900 #00403 Engine Mount1320900 required can fieldFOX WRENCHES9~W#50404 Engine Mount1365900 Co #7OlOl2WayW#nc0316 Shaft$22550 6 0 656 650601 EvgineMouvt14751000 #701022 Way Wrench lid Shalt225#50602 Engine MOunt 15201000 #70103 2Way Wrevch 0116 Shalt$225#50803 Evgine Mount 16401000 #70104 FourWay Wrench79553115 Tow ee n Fe Sm h Arkansas 72901#50604 EngineMount 17501000 Ream ers & Wrenches Plugs & Mounts & Spinners January 198243 case youre wonaering neros now HOfl uoing converamun Kraft KP-7Z Transmitter Ace Silver Seven encoder guts left transmitter case removed accept new encoder main frame flat battery pack PIBERGLASS COWLSL UNIVERSAL RADIALS 5 diameter-3% deep600 5 diameter-3 deep650 6 diameter-5 deep1200 7 diameter-4 deep1000 7W diameter-5 deep1000 94 diameter-4 deep1200 9 diameter-S deep1200 10 diameter-9 deep2500 11 diameter-6 deep1800 11 Y diameter-7 deep2000 ASTRO FLIGHT Porterfield500 TOP- FLITE P-39 Aircobra600 P-40 Warhawk900 P-47-D Thunderbolt F-8-F-2 Bearcat F-4U Corsair1000 J-3 Cub800 WHEELPANTS 7 long 3 wheel700 8 long 3-4 wheel800 9 long 4-4W wheel900 10 long 4-SW wheel1000 11 long 4-4W wheel1100 12 long 5-6 wheel1200 SIG Kadet Kavalier Komander Kougar550 J-3 Cub600 Cessna 1S0 Liberty Sport Skybolt800 Smith Minibiplane Beech Bonanza .. 1000 COWLS FOR BEHRENS GIANT SCALE PLANS JB Special MK Ill Travel Air 2000 Fokker D-VII1500 Travel Air 4000 $2000 wheelpants1000 JACK STAFFORD B-24 set 41200 NEW MAULE LUNAR ROCKET MS Cowl 00Windshield 0 ORDERING INFORMATION Add $1 50 shipping Charge within US $200 outside US New York residents add 7% Ma ii order FIBERGLASS MASTERsales tax * FOR IN FORMATION ON PLANS PO Box 1 34M Bayshore NY 11 706 Write Behrens Plan Service 31-27 Healy Avenue Far RoCkaway NY 11691 call 212 337-6987 QUARTER SCALE J-3Cub1000 Stinson Voyager 1200 Fleet Biplane CONCEPT 1200 Aeronca Champ BUD NOSEN ..... 1800 Mr Mulligan BUD NOSEN 2000 P-Si Mustang BUD NOSEN 2000 P-47-D Jug BUD NOSEN 2500 Citabria cowl 800 wheelpants .. 900 PICA FW 190 D-9 Waco F-31000 Cessna 182 Bucker Jungmeister1200 T-28B Trojan1500 JEMCO PT-19600 FW 190 D-9650 ABM-3 Zero800 AT-S North American1000 F-6-F Hellcat F-4U Corsairor P-47-DJug . 1200 Just record 1982 will year F3B team selections again sighting devices mentioned can help club lend support contests units small enough portable enough set up practice sessions much less effort before Have Dan Pruss Rt 2 Box 49D Plainfiei4 IL 60544 RC Aerobatics/Van Putte Continued page 43 wing dihedral theres enough wing dihedral airplane may roll left So least two things can done improve roll coupling yaw commands First wing dihedral can increased Second location vertical tin aerodynamic center can moved closer fuselage axis putting some vertical fin bottom fuselage via ventral fin Pattern fliers have special problem because dont want rolling moment gener ated rudder deflected thats will see lot Pattern airplanes ventral fins close attention correct wing dihedral angle two rolling moments cancel other rudder deflected just got copy 1981 Nats issue November somewhat disappointed published list results Once again year top 10 Pattern finalists event made list Like other contestants wanted find out just finished Lets hope theres enough room next Nats issue publish complete list contestant placings way next Nats will probably lot cooler several have recent years Lakehurst NAS often has benefit being cooler during summer other sites due moderating effect shore breezes Atlantic Ocean fact may tery cool I DESIGNED BY BILL EVANS FOR YOU STANDARD KIT $8995 - Epoxy Fiberglass Fuselage - Foam Cores - Ply Wing Sheeting - Gear Formed - Balsa Parts Cot Shape - Sliding Tray - Foil Size Plans BASIC KIT $5995 Glass Fuse Cores - Ply Plans Add 5300 s5pe,iq CA resderds odd e See YOUr Deale o o de f om BILL EVANS AIR/CRAFT 20825 1/2 Roscue Blvd Canoga Park CA 91305 213 709-0894 remember attending Pattern contest 10 years ago stationed Andrews AFB near Washington DC weekend temperature hit 900 during day Washington about 650 Lakehurst wind almost blew clothes off backs Don Lowe took turns sharing old grubby blanket kept car have never seen blimp hangar going Lakehurst will offer real treat Some largest blimp hangars world Lakehurst big can have own weather inside days conditions right has rained inside biggest hangars wasnt raining outside received update Dow Corning antifoaming agent fuel John Perault La Grange IN called Model Atiation editorial office told found out Q antifoaming agent discontinued 1976 has replaced DB-l00 sells $8 per pound individuals companies available Dow Corning d~tors 5-gallon can about $300 ll Dow Coming 800 248-2345 t what need will tell tarest distributor located local distributor may send free sample did thanks John Perault called long distance own expense Ron Van Pulle 111 Sleepy Oaks Rd Fort Walton Beach FL 32548 RC Helicopters/Chesney Continued page 44 competition day number entries exceeded 20 Two years ago 26 contestants used two flight lines laid out 90 degrees other due field limitations number complaints heard because flight line perfectly aligned prevail ing wind other creates unfair competitive edge should avoided year anticipated same relative num ber entries four classes past contests consisted approximately same number entries Novice class Scale Intermediate Expert classes combined Thus set up second flight line Novices Whoever said CDs job easy 108 Model Aviation SIMIlAR b40 40 Powered 50 Inch Flying Wing design makes flying wing practical reality everyone UKUbWIND 19 Powered 72 inch Semi Sailplane Son Seville featured Aug 1981 Model Aviation
Edition: Model Aviation - 1982/01
Page Numbers: 42, 43, 108
Radio Control Sport/ Aerobatics Ron Van Putte RECENTLY received copy new book about radio control Kaimbach Publish ing Company Its called Getting Most Radio Control Systems author Fred Marks Does Fred Marks name ring bell about Ace Silver Seven Fred guiding force behind Silver Seven electronic products Ace sells Freds book quite different books RC treat transmitter receiver servos black boxes make things work mysterious wonderful ways Fred explains basic system components work manner people can understand approach same electronics engin eer would use simply because Fred aero nautical engineer trade developed expertise RC because interest hobby hes very succesful chapters Marks book read like wish list RC-oriented items us would benefit knowing about Besides de scribing basic system components work chapters discuss building RC components kits system maintenance component trouble-shooting repair installa don equipment RC accessories like chargers expanded scale voltmeters chapter super systems work Since costs $895 lot RCers will get back times over performing simple component troubleshooting repair Its probably available local bookstore hobby shop received interesting letter Chuck Nourcier Lake Charles LA such general interest excerpt follows have discovered something interesting yaw problems 40-sized Pattern airplane friend Nat Penten suggested putting tips wing after some experimenting found Out correct rolling rudder piece 1/32 1/16 plywood glued angle between 3Q0 400 measued plane wing 00 would parallel wing 900 would perpendicular wing Angling tips up caused rolling effect same direction yaw give right rudder plane would roll right angling tips down get opposite effect tips very big about 3 4 wide length chord trimmed get desired effect Now something else think about same guy designed built flying wing Probably same picture Nats coverage R VP mounted dorsal fin above canopy caused airplane roll Both effects can explained fairly opposite direction yaw Right rudder easily First tips modify dihedral effect caused airplane roll left Explain wing Most people realize usually onewing dihedral makes airplane roll P\VF LyJ FIGURE 1 F FIGURE2 some models bank left give right rudder Ron talks about month 42 Model Aviation Heres Rons completed Ace Silver Seven encoder mainframe trim adjust board upper left mixer board upper right mixer board plugs transmitter trim adjust board would normally go Theres lot wiring yet project rudder deflected Thats airplanes ailerons have substantially dihedral wings have ailerons However Pattern airplane too little too much dihedral can problem pure yaw needed airplane rolls rudder deflection get sloppy Stall Turn FourPoint Roll Eight-Point Roll Knife-Edge Flight etc Pattern fliers cut wing half change dihedral rudder deflection gives yaw effects tip plates installed tips above plane wing tips will increase wing dihedral effect course converse true So put Pattern airplane level flight condition put right rudder airplane rolls right either less dihedral needed tip plates should installed tip below plane wing vice versa Tip plates can used rudder-only airplanes get dihedral effect wing doesnt have enough certainly beats cutting wing half putting back together again get proper dihedral angle Try it works Now what about flying wing rolled left right rudder given kind reaction usually noted airplanes short fuselages very large vertical fins problem caused way yawing moment gener ated want nose airplane yaw right rudder must moved right causes airflow about vertical fin deflected right generating forces left vertical fin effect incremental forces vertical fin added up d see could replace incre mental forces acting over fin force acting about third way up bottom Figure 1 about halfway back fin leading edge bottom Figure 2 point called aerodynamic center vertical fin can look effect force vertical fin two ways expect multiplying force times distance tail aerodynamic center airplane center mass yawing moment causes nose airplane move right However multiply force times distance tail aerodynamic center above fuselage axis get rolling moment tends roll airplane counterclockwise Now airplanes dont yaw right roll left same timeso Wing dihedral causes opposing yawing moment generated direction rudder moved right rudder produces clockwise rolling moment sufficient Continued page 108 THINK FOX N N Weve Got #6006Cone oaSpne 0200 6601071 Conventional Spinner 1300 660108 2 Conoentional Spinner1400 86010927 Conoenlional Spinner1500 #601 tO 24 Conventional Spinner 1600 #602061 Jon Spinne$1300 #602071 4 Olin Jin Spinner1400 A#60208 2 Siin 1mm Spinner1000 #60209 24 Olin Jin Spinner1600 #60210 2 Olin Jin Spinne1700 6603061 cal Spinner $1200 {#603071 4 Conical Spinne1300 #60300 2 Conical Spinnet1400 #603092/ Conical Spinner 1004 #603102/ Conical Spinne 1600 FOX POLISHED SPINNERS SPINNER NUTS Offered nt Three Altreclt e Styles #60503 1032 Sp nne Net$200 Conventtonal Slim Jim / Conical#60004 1 4 Sp nne Not220 Support Hardware 12 Volt Glow Plugs Dry cell Nickel Cad 2 Volt Glow Plugs Lead-Acid Battery THE FOX GLOW PLUGS #40101 Standard Short0119 each#40103 Standard Short0119 #40201 Standard Longll9each#dS2O3Standard Long119 nach #40502 SIC Short 169 each#40503 RIC Short 1O9each #40002 SIC Long 109each#40603 SIC Long169 #70201 FOX 4vtvp Reamer 670202 FOX KOB Roamer formostoorpoves0600 KOB Shalt vices $695 FOX PROP REA MERSFOUR-WAY & FOX ENGINE MOUNTS-#OO2lOEngineMount10000800 #50203 Engine Mount 1135 000 #50204 Engine MOunt 1217800 Enlarge Prop Shaft Holes larger sizesTWOWAYRugged Machived trom Bar Stock#50401 Engine Mount 1217900 #00402 Engine Mount1201900 #00403 Engine Mount1320900 required can fieldFOX WRENCHES9~W#50404 Engine Mount1365900 Co #7OlOl2WayW#nc0316 Shaft$22550 6 0 656 650601 EvgineMouvt14751000 #701022 Way Wrench lid Shalt225#50602 Engine MOunt 15201000 #70103 2Way Wrevch 0116 Shalt$225#50803 Evgine Mount 16401000 #70104 FourWay Wrench79553115 Tow ee n Fe Sm h Arkansas 72901#50604 EngineMount 17501000 Ream ers & Wrenches Plugs & Mounts & Spinners January 198243 case youre wonaering neros now HOfl uoing converamun Kraft KP-7Z Transmitter Ace Silver Seven encoder guts left transmitter case removed accept new encoder main frame flat battery pack PIBERGLASS COWLSL UNIVERSAL RADIALS 5 diameter-3% deep600 5 diameter-3 deep650 6 diameter-5 deep1200 7 diameter-4 deep1000 7W diameter-5 deep1000 94 diameter-4 deep1200 9 diameter-S deep1200 10 diameter-9 deep2500 11 diameter-6 deep1800 11 Y diameter-7 deep2000 ASTRO FLIGHT Porterfield500 TOP- FLITE P-39 Aircobra600 P-40 Warhawk900 P-47-D Thunderbolt F-8-F-2 Bearcat F-4U Corsair1000 J-3 Cub800 WHEELPANTS 7 long 3 wheel700 8 long 3-4 wheel800 9 long 4-4W wheel900 10 long 4-SW wheel1000 11 long 4-4W wheel1100 12 long 5-6 wheel1200 SIG Kadet Kavalier Komander Kougar550 J-3 Cub600 Cessna 1S0 Liberty Sport Skybolt800 Smith Minibiplane Beech Bonanza .. 1000 COWLS FOR BEHRENS GIANT SCALE PLANS JB Special MK Ill Travel Air 2000 Fokker D-VII1500 Travel Air 4000 $2000 wheelpants1000 JACK STAFFORD B-24 set 41200 NEW MAULE LUNAR ROCKET MS Cowl 00Windshield 0 ORDERING INFORMATION Add $1 50 shipping Charge within US $200 outside US New York residents add 7% Ma ii order FIBERGLASS MASTERsales tax * FOR IN FORMATION ON PLANS PO Box 1 34M Bayshore NY 11 706 Write Behrens Plan Service 31-27 Healy Avenue Far RoCkaway NY 11691 call 212 337-6987 QUARTER SCALE J-3Cub1000 Stinson Voyager 1200 Fleet Biplane CONCEPT 1200 Aeronca Champ BUD NOSEN ..... 1800 Mr Mulligan BUD NOSEN 2000 P-Si Mustang BUD NOSEN 2000 P-47-D Jug BUD NOSEN 2500 Citabria cowl 800 wheelpants .. 900 PICA FW 190 D-9 Waco F-31000 Cessna 182 Bucker Jungmeister1200 T-28B Trojan1500 JEMCO PT-19600 FW 190 D-9650 ABM-3 Zero800 AT-S North American1000 F-6-F Hellcat F-4U Corsairor P-47-DJug . 1200 Just record 1982 will year F3B team selections again sighting devices mentioned can help club lend support contests units small enough portable enough set up practice sessions much less effort before Have Dan Pruss Rt 2 Box 49D Plainfiei4 IL 60544 RC Aerobatics/Van Putte Continued page 43 wing dihedral theres enough wing dihedral airplane may roll left So least two things can done improve roll coupling yaw commands First wing dihedral can increased Second location vertical tin aerodynamic center can moved closer fuselage axis putting some vertical fin bottom fuselage via ventral fin Pattern fliers have special problem because dont want rolling moment gener ated rudder deflected thats will see lot Pattern airplanes ventral fins close attention correct wing dihedral angle two rolling moments cancel other rudder deflected just got copy 1981 Nats issue November somewhat disappointed published list results Once again year top 10 Pattern finalists event made list Like other contestants wanted find out just finished Lets hope theres enough room next Nats issue publish complete list contestant placings way next Nats will probably lot cooler several have recent years Lakehurst NAS often has benefit being cooler during summer other sites due moderating effect shore breezes Atlantic Ocean fact may tery cool I DESIGNED BY BILL EVANS FOR YOU STANDARD KIT $8995 - Epoxy Fiberglass Fuselage - Foam Cores - Ply Wing Sheeting - Gear Formed - Balsa Parts Cot Shape - Sliding Tray - Foil Size Plans BASIC KIT $5995 Glass Fuse Cores - Ply Plans Add 5300 s5pe,iq CA resderds odd e See YOUr Deale o o de f om BILL EVANS AIR/CRAFT 20825 1/2 Roscue Blvd Canoga Park CA 91305 213 709-0894 remember attending Pattern contest 10 years ago stationed Andrews AFB near Washington DC weekend temperature hit 900 during day Washington about 650 Lakehurst wind almost blew clothes off backs Don Lowe took turns sharing old grubby blanket kept car have never seen blimp hangar going Lakehurst will offer real treat Some largest blimp hangars world Lakehurst big can have own weather inside days conditions right has rained inside biggest hangars wasnt raining outside received update Dow Corning antifoaming agent fuel John Perault La Grange IN called Model Atiation editorial office told found out Q antifoaming agent discontinued 1976 has replaced DB-l00 sells $8 per pound individuals companies available Dow Corning d~tors 5-gallon can about $300 ll Dow Coming 800 248-2345 t what need will tell tarest distributor located local distributor may send free sample did thanks John Perault called long distance own expense Ron Van Pulle 111 Sleepy Oaks Rd Fort Walton Beach FL 32548 RC Helicopters/Chesney Continued page 44 competition day number entries exceeded 20 Two years ago 26 contestants used two flight lines laid out 90 degrees other due field limitations number complaints heard because flight line perfectly aligned prevail ing wind other creates unfair competitive edge should avoided year anticipated same relative num ber entries four classes past contests consisted approximately same number entries Novice class Scale Intermediate Expert classes combined Thus set up second flight line Novices Whoever said CDs job easy 108 Model Aviation SIMIlAR b40 40 Powered 50 Inch Flying Wing design makes flying wing practical reality everyone UKUbWIND 19 Powered 72 inch Semi Sailplane Son Seville featured Aug 1981 Model Aviation
Edition: Model Aviation - 1982/01
Page Numbers: 42, 43, 108
Radio Control Sport/ Aerobatics Ron Van Putte RECENTLY received copy new book about radio control Kaimbach Publish ing Company Its called Getting Most Radio Control Systems author Fred Marks Does Fred Marks name ring bell about Ace Silver Seven Fred guiding force behind Silver Seven electronic products Ace sells Freds book quite different books RC treat transmitter receiver servos black boxes make things work mysterious wonderful ways Fred explains basic system components work manner people can understand approach same electronics engin eer would use simply because Fred aero nautical engineer trade developed expertise RC because interest hobby hes very succesful chapters Marks book read like wish list RC-oriented items us would benefit knowing about Besides de scribing basic system components work chapters discuss building RC components kits system maintenance component trouble-shooting repair installa don equipment RC accessories like chargers expanded scale voltmeters chapter super systems work Since costs $895 lot RCers will get back times over performing simple component troubleshooting repair Its probably available local bookstore hobby shop received interesting letter Chuck Nourcier Lake Charles LA such general interest excerpt follows have discovered something interesting yaw problems 40-sized Pattern airplane friend Nat Penten suggested putting tips wing after some experimenting found Out correct rolling rudder piece 1/32 1/16 plywood glued angle between 3Q0 400 measued plane wing 00 would parallel wing 900 would perpendicular wing Angling tips up caused rolling effect same direction yaw give right rudder plane would roll right angling tips down get opposite effect tips very big about 3 4 wide length chord trimmed get desired effect Now something else think about same guy designed built flying wing Probably same picture Nats coverage R VP mounted dorsal fin above canopy caused airplane roll Both effects can explained fairly opposite direction yaw Right rudder easily First tips modify dihedral effect caused airplane roll left Explain wing Most people realize usually onewing dihedral makes airplane roll P\VF LyJ FIGURE 1 F FIGURE2 some models bank left give right rudder Ron talks about month 42 Model Aviation Heres Rons completed Ace Silver Seven encoder mainframe trim adjust board upper left mixer board upper right mixer board plugs transmitter trim adjust board would normally go Theres lot wiring yet project rudder deflected Thats airplanes ailerons have substantially dihedral wings have ailerons However Pattern airplane too little too much dihedral can problem pure yaw needed airplane rolls rudder deflection get sloppy Stall Turn FourPoint Roll Eight-Point Roll Knife-Edge Flight etc Pattern fliers cut wing half change dihedral rudder deflection gives yaw effects tip plates installed tips above plane wing tips will increase wing dihedral effect course converse true So put Pattern airplane level flight condition put right rudder airplane rolls right either less dihedral needed tip plates should installed tip below plane wing vice versa Tip plates can used rudder-only airplanes get dihedral effect wing doesnt have enough certainly beats cutting wing half putting back together again get proper dihedral angle Try it works Now what about flying wing rolled left right rudder given kind reaction usually noted airplanes short fuselages very large vertical fins problem caused way yawing moment gener ated want nose airplane yaw right rudder must moved right causes airflow about vertical fin deflected right generating forces left vertical fin effect incremental forces vertical fin added up d see could replace incre mental forces acting over fin force acting about third way up bottom Figure 1 about halfway back fin leading edge bottom Figure 2 point called aerodynamic center vertical fin can look effect force vertical fin two ways expect multiplying force times distance tail aerodynamic center airplane center mass yawing moment causes nose airplane move right However multiply force times distance tail aerodynamic center above fuselage axis get rolling moment tends roll airplane counterclockwise Now airplanes dont yaw right roll left same timeso Wing dihedral causes opposing yawing moment generated direction rudder moved right rudder produces clockwise rolling moment sufficient Continued page 108 THINK FOX N N Weve Got #6006Cone oaSpne 0200 6601071 Conventional Spinner 1300 660108 2 Conoentional Spinner1400 86010927 Conoenlional Spinner1500 #601 tO 24 Conventional Spinner 1600 #602061 Jon Spinne$1300 #602071 4 Olin Jin Spinner1400 A#60208 2 Siin 1mm Spinner1000 #60209 24 Olin Jin Spinner1600 #60210 2 Olin Jin Spinne1700 6603061 cal Spinner $1200 {#603071 4 Conical Spinne1300 #60300 2 Conical Spinnet1400 #603092/ Conical Spinner 1004 #603102/ Conical Spinne 1600 FOX POLISHED SPINNERS SPINNER NUTS Offered nt Three Altreclt e Styles #60503 1032 Sp nne Net$200 Conventtonal Slim Jim / Conical#60004 1 4 Sp nne Not220 Support Hardware 12 Volt Glow Plugs Dry cell Nickel Cad 2 Volt Glow Plugs Lead-Acid Battery THE FOX GLOW PLUGS #40101 Standard Short0119 each#40103 Standard Short0119 #40201 Standard Longll9each#dS2O3Standard Long119 nach #40502 SIC Short 169 each#40503 RIC Short 1O9each #40002 SIC Long 109each#40603 SIC Long169 #70201 FOX 4vtvp Reamer 670202 FOX KOB Roamer formostoorpoves0600 KOB Shalt vices $695 FOX PROP REA MERSFOUR-WAY & FOX ENGINE MOUNTS-#OO2lOEngineMount10000800 #50203 Engine Mount 1135 000 #50204 Engine MOunt 1217800 Enlarge Prop Shaft Holes larger sizesTWOWAYRugged Machived trom Bar Stock#50401 Engine Mount 1217900 #00402 Engine Mount1201900 #00403 Engine Mount1320900 required can fieldFOX WRENCHES9~W#50404 Engine Mount1365900 Co #7OlOl2WayW#nc0316 Shaft$22550 6 0 656 650601 EvgineMouvt14751000 #701022 Way Wrench lid Shalt225#50602 Engine MOunt 15201000 #70103 2Way Wrevch 0116 Shalt$225#50803 Evgine Mount 16401000 #70104 FourWay Wrench79553115 Tow ee n Fe Sm h Arkansas 72901#50604 EngineMount 17501000 Ream ers & Wrenches Plugs & Mounts & Spinners January 198243 case youre wonaering neros now HOfl uoing converamun Kraft KP-7Z Transmitter Ace Silver Seven encoder guts left transmitter case removed accept new encoder main frame flat battery pack PIBERGLASS COWLSL UNIVERSAL RADIALS 5 diameter-3% deep600 5 diameter-3 deep650 6 diameter-5 deep1200 7 diameter-4 deep1000 7W diameter-5 deep1000 94 diameter-4 deep1200 9 diameter-S deep1200 10 diameter-9 deep2500 11 diameter-6 deep1800 11 Y diameter-7 deep2000 ASTRO FLIGHT Porterfield500 TOP- FLITE P-39 Aircobra600 P-40 Warhawk900 P-47-D Thunderbolt F-8-F-2 Bearcat F-4U Corsair1000 J-3 Cub800 WHEELPANTS 7 long 3 wheel700 8 long 3-4 wheel800 9 long 4-4W wheel900 10 long 4-SW wheel1000 11 long 4-4W wheel1100 12 long 5-6 wheel1200 SIG Kadet Kavalier Komander Kougar550 J-3 Cub600 Cessna 1S0 Liberty Sport Skybolt800 Smith Minibiplane Beech Bonanza .. 1000 COWLS FOR BEHRENS GIANT SCALE PLANS JB Special MK Ill Travel Air 2000 Fokker D-VII1500 Travel Air 4000 $2000 wheelpants1000 JACK STAFFORD B-24 set 41200 NEW MAULE LUNAR ROCKET MS Cowl 00Windshield 0 ORDERING INFORMATION Add $1 50 shipping Charge within US $200 outside US New York residents add 7% Ma ii order FIBERGLASS MASTERsales tax * FOR IN FORMATION ON PLANS PO Box 1 34M Bayshore NY 11 706 Write Behrens Plan Service 31-27 Healy Avenue Far RoCkaway NY 11691 call 212 337-6987 QUARTER SCALE J-3Cub1000 Stinson Voyager 1200 Fleet Biplane CONCEPT 1200 Aeronca Champ BUD NOSEN ..... 1800 Mr Mulligan BUD NOSEN 2000 P-Si Mustang BUD NOSEN 2000 P-47-D Jug BUD NOSEN 2500 Citabria cowl 800 wheelpants .. 900 PICA FW 190 D-9 Waco F-31000 Cessna 182 Bucker Jungmeister1200 T-28B Trojan1500 JEMCO PT-19600 FW 190 D-9650 ABM-3 Zero800 AT-S North American1000 F-6-F Hellcat F-4U Corsairor P-47-DJug . 1200 Just record 1982 will year F3B team selections again sighting devices mentioned can help club lend support contests units small enough portable enough set up practice sessions much less effort before Have Dan Pruss Rt 2 Box 49D Plainfiei4 IL 60544 RC Aerobatics/Van Putte Continued page 43 wing dihedral theres enough wing dihedral airplane may roll left So least two things can done improve roll coupling yaw commands First wing dihedral can increased Second location vertical tin aerodynamic center can moved closer fuselage axis putting some vertical fin bottom fuselage via ventral fin Pattern fliers have special problem because dont want rolling moment gener ated rudder deflected thats will see lot Pattern airplanes ventral fins close attention correct wing dihedral angle two rolling moments cancel other rudder deflected just got copy 1981 Nats issue November somewhat disappointed published list results Once again year top 10 Pattern finalists event made list Like other contestants wanted find out just finished Lets hope theres enough room next Nats issue publish complete list contestant placings way next Nats will probably lot cooler several have recent years Lakehurst NAS often has benefit being cooler during summer other sites due moderating effect shore breezes Atlantic Ocean fact may tery cool I DESIGNED BY BILL EVANS FOR YOU STANDARD KIT $8995 - Epoxy Fiberglass Fuselage - Foam Cores - Ply Wing Sheeting - Gear Formed - Balsa Parts Cot Shape - Sliding Tray - Foil Size Plans BASIC KIT $5995 Glass Fuse Cores - Ply Plans Add 5300 s5pe,iq CA resderds odd e See YOUr Deale o o de f om BILL EVANS AIR/CRAFT 20825 1/2 Roscue Blvd Canoga Park CA 91305 213 709-0894 remember attending Pattern contest 10 years ago stationed Andrews AFB near Washington DC weekend temperature hit 900 during day Washington about 650 Lakehurst wind almost blew clothes off backs Don Lowe took turns sharing old grubby blanket kept car have never seen blimp hangar going Lakehurst will offer real treat Some largest blimp hangars world Lakehurst big can have own weather inside days conditions right has rained inside biggest hangars wasnt raining outside received update Dow Corning antifoaming agent fuel John Perault La Grange IN called Model Atiation editorial office told found out Q antifoaming agent discontinued 1976 has replaced DB-l00 sells $8 per pound individuals companies available Dow Corning d~tors 5-gallon can about $300 ll Dow Coming 800 248-2345 t what need will tell tarest distributor located local distributor may send free sample did thanks John Perault called long distance own expense Ron Van Pulle 111 Sleepy Oaks Rd Fort Walton Beach FL 32548 RC Helicopters/Chesney Continued page 44 competition day number entries exceeded 20 Two years ago 26 contestants used two flight lines laid out 90 degrees other due field limitations number complaints heard because flight line perfectly aligned prevail ing wind other creates unfair competitive edge should avoided year anticipated same relative num ber entries four classes past contests consisted approximately same number entries Novice class Scale Intermediate Expert classes combined Thus set up second flight line Novices Whoever said CDs job easy 108 Model Aviation SIMIlAR b40 40 Powered 50 Inch Flying Wing design makes flying wing practical reality everyone UKUbWIND 19 Powered 72 inch Semi Sailplane Son Seville featured Aug 1981 Model Aviation