SOARING Dan Pruss difference between first place just being therecovered beauty Rob Nelson Fresno CA came Robs suggestion simple Tape small 2- suggestion would make landings look like 22-in long piece 1/16 square balsa landingsif wanted earn points nose plane such way anything Robs idea might impractical flaired landing will break balsa large size contest would have merit least balsa broken landingno landing points club levelespecially boilerplate specials plane 100 point spot would out-survive somebody elses gossamer- Continued page 116 SNO Fly 1980 few contests gets yearly recognition perhaps size held dead winter winter temperatures just make funis Greater Detroit Soaring Hiking Societys Annual Sno Fly contest has just few people planning winter leisure time around few others trek couple hundred miles take year 5 1 thermal seekers showed up hopes getting three 7-minute mazes weather would make brass monkey cringe According Warren Tiahrt contest director weather classicplenty cold just enough wind test ones constitution Tempera tures ranged 50F briefing time 200F final round snow flurry did show up just make everything legal 10-15 mph winds extended building season few notso-lucky fliers Top Fivewith some nationally familiar names Unlimited Class 1Dave Corven1202 2Chris Corven1101 3Jim Bohmer1012 4Bob Robinson998 5Pat Flinn978 Standard Class 1Ray Hayes1014 2Eric Podzielinski1019 3Dale Martell900 4Walt Hill848 5Bill Doyle814 Two-Meter 1Mike Fritz73 2John Humphreys665 3Dave Henshaw645 4Jerry Mrlik589 5Jeff Mrlik464 event Unlimited Standard Two-Meter classes Tiahrt reported Two-Meter class did quite wellagainst twometer birds also pointed out 5 1 entrants individual contestants entry allowed per flier bad contest nobody looks shade tree Spot landings As long contests spot landings will what lexicon sailplaners refers dork landings probably have suggestions eliminate unsailplane-like maneuver fliers Most suggestions past designed around de-emphasizing point value landings ideas worked Reason quarter point could earn landing could bet tight duration contest someone would punch spot quarter point July 1980 35 have peiformed everything except landing go back try maneuver again will give feeling continuity about flight will make comfortable step before judges Its also good idea practice help caller because thats way will contest caller can provide suggestions can improve caller will often see things wrong maneuver pilot didnt notice caller can also suggest improvement framing maneuver front judges getting airplane proper heading way pilot tells judges what doing very important judges know exactly whats going Its always good idea call maneuvers during practice its new strange thing contest youve got enough other things mind recommend calling sequence follows after maneuver complete caller tells pilot what maneuver next pilot tells judges before during turnaround After turnaround pilot informs judges airplane heading next maneuver pilot should call start completion maneuver proper times typical sequence might 1 next maneuver will Immelmann Turn 2 heading MAMMOTH SCALERS r have available ccuplete Jam Inesvazta aml rojfflers ,at 90 334718 hita a2og Quarter PS USE 12221 Sm Igmeim Ca 5*112 Immelmann Turn 3 maneuver beginning now 4 Maneuver complete think pilot should stand upwind judges have better chance hearing him flight line usually noisy place flight circle being used pilot upwind wind will blow voice back judges rather away pilots attitude toward judges also important feel pilots duty present flight can judged fairly impartially talking up down judges Extraneous comments quality maneuvers should avoided Dont apologize bad maneuver pat yourself back good judges will tell what thought about opinions important ones anyway Remember getting ready contest success pattern competition largely function preparations went Luck has very little results Ron Van Putte 12 Connie Drive Shalimar FL 32579 SAFE FLYING IS NO ACCIDENT RC SOARING/PR USS Co ntinued page 35 IBALSA SQ 16 TAPE- NOSE OF PLANE THIS DISTANCE WOULD BE THE SAME FOR ALL PLANES Ron Nelsons smoothlanding detector Rob suggests balsa taped nose distance end balsa ground would same airplane no matter what nose shape idea might present couple problems organizers its worth trying local level Large scale Last month some pics details passed gave impression what happening Europe 1/5 scale sailplane world Well lot us thinking compact cars two-meter easy-totote flying machines small group modelers turning out birds would find themselves suffering hangar rash 20-foot motor home Theres SB-9 availableready Data Wingspan 733 meters fuselage length 25 meters all-up weight 75 kilograms Fuselage epoxy molded wing foam core wood covering Airfoil Eppler 203 Cost 800 DM around $500 Germany does fly guess its like gent 600-pound gorilla asked walked Anywhere wanted SB-9 designed primarily slope flying birds size flying usually day weekend outing guess could say its like getting fill scale soaring scale bird far less 1/3 costnow convince wife Soar Gull gull-wing sailplane pictured month Duane Eisenbeiss Duane isnt flying United Airlines hes flying own full size Standard Cirrus its above hes drawing building board arent necessarily order priorities its what tells boss According Duane plane designed look different easy fly Theres no question its distinct feaures plane easy spot gaggle homing same thermal Duane says gull wing used mostly appearance does however cause wings lifting force act well above fuselage thereby contributing positive stability through pendulum effect Duane also says two control surfaces should have less drag three fore V chosen V tail also lighter weight savings tail plus factor design Soar Gull has over 150 flights results have beyond drawing board hopes Its 100 inches wingspan weighs 55 ounces has empty wing loading 88 ounces per square foot two-piece V tail slides onto wooden 116 Model Aviation REALISMSCALE ACCESSORIES TY WILLIAMS BROTHERS RADIO CONTROL SCALE PILOTS E WHEELS CONTROL-LINECYLINDERS ENGINE KITS MACHINE GUN KITS FREE-FLIGHT TIC DISPLAY MODELS SEND $1 FOR COMPLETE ILLUSTRATED CATALOG DEPT MA 181 PAWNEE STREET SAN MARCOS CA 9 u OIlY VTHE NEW FIREBALL GLOW PLUGS ARE LEAKPROOF AND BLOWOUT PROOF EVEN FOR THE NEW MONSTER ENGINES BUT THEY ARE STILL THE OLD PRICE OF$1 10 WRITE NOW! SWANSON PO Box 151liZ Wayn eN 07470 XECUTIVE CORP AmItyvIll NY 11701 FAI team selection program Its again well underway time read Subject vote program entrants Team Finals will Pensacola FL excellent flying site over Labor Day weekend Rae Fritz excellent contest director will keep everybody honest Its guaranteed excitement worth watching cant compete outcome Second World Championships last year Belgium surely will have influence designs year So want see what F3B about see some designs dreams year ago think PensacolaLabor Day further information program contact Ray Marvin 2781 South Garfield Denver CO 80210 Lets go flying Dan Pruss RR 2 Box 490 Plainfield IL 60544 RC HELICOPTERS/CHESNEY co ntinued page 36 quired pull wing through air fast enough get plane air keep same true helicopterbut airplane drag largely result induced drag creating lift plus parasitic profile drag caused resistance bumps lumps like wheels canopies other junk sticking out airstream helicop ter also subject mechanical drag Powerrobbing drag bad enough binds helicopter gear train course binds running friction factor mechanics drive system should assembled carefully reduce friction Now succeed overcoming drag gravity get helicopter airplane moving forward flight similarities control response can checked out See Figure 2 airplane controlled about roll axis its ailerons increasing decreasing lift ofeach wing tip opposite other helicopter control similar ailerons called right/left cyclic lateral cyclic So roll bank airplane move aileron stick helicopter rolled banked using cycliclateral cyclic pitch axisthe airplane controlled elevator down elevator causes nose drop up elevator nose rise copter friend cyclic back again now forelaft cyclic longitudinal cyclic Longi tudinal cyclic causes helicopter nose pitch down forward command up aft command remember forward flight right now forward flight helicopter tail rotor similar rudder airplane both control yaw nose aircraft right left Right stick right yaw left stick left yaw airplane note some RC heli copter fliers set control linkage tail rotor right stick gives left nose right tail boom movement like fullscale helicopter Reasons changing tail rotor control will become apparent begin flight training set up normal yaw initially examples flight control similarity aircraft moving forward through air An airplane motion through air called parked tied-downmaybe crashed airplane must moving forward against relative airflow speed sufficient provide lift overcome gravity helicopter may indeed stop move rearward sideways because engine-driven rotating wings provide relative airflow helicopter will lifted off ground engine power rotor pitch set blades rotating against relative wind such way provide enough lift overcome gravity no other forces acting helicopter will hover Now lateral longitudinal cyclic controls may used slide helicopter laterally left right longi tudinally forward rearward tail rotor must used yaw control also keep fuselage spinning around against rotation main rotor Well get back tail rotor later now what cyclic pitch rotor blades Cyclic pitch changes responsible lateral longitudinal movement helicopter An application cyclic control causes pitch blade change opposite other effect blade will oscillate fixed collective pitch setting through positive relative pitch back collective reference pitch relative negative pitch setting back reference collective pitch setting highest lowest relative pitch positions blade will determined position cyclic stick Keep mind blade reaches its highest pitch opposite blade will its lowest pitch excursion blade during revolution like sine wave See Figure 3 Next month will have about cyclic collective pitch rotor head swash plate Dave Chesney Rt 9 Box 621A Greensboro NC 27409 CL BEECHCRAFT/HAUGHT continued page 40 made Instruct helper watch excessive outward yaw unlevel wings will able notice things circles center well another opinion always useful Too much outward yaw causes excessive line tension can see top bottom wings indicates correction needed Both conditions may alleviated relocating leadout guide see tops wings lower guide too much outward yaw move guide forward etc tail heavy model will too difficult control Too much nose weight makes model too sluggish controls too sensitive move pushrod bellcrank down elevator horn etc Level flight boring will find Beech fully aerobatic Loops basic maneuver Most beginners hold fixed amount too much up resulting mushy loop Try varying control throughout loop making big round Lazy eights logical progression inverted flight Begin normal loop neutral ize controls kr way through loop hesitating split second model its back shallow dive give down elevator come around end eight returning level flight Practice lazy eights extending inverted protion until achieve magical first lap inverted flight its merely matter practice Soon youll able tolerate lap upright level flight row Staggerwing SAFE FLYING IS NO ACCIDENT July 1980 117 Deep uselag full cabin b flight capability 112 40 to 60 EngInes igepan dowels lightness movable tail ORGANIZED surfaces actuated movable stubsHee S set 4 sturdy fries hoS OVer fit tail Soar Gull only4 years Vt favorite 8 11 magazirtes different its package clever innovations 4 MAG FILES $495 linkages designsend 5495 plus St 00 postage handtrrrg DON INDUSTRIES P0 BOX 388-K DOVER NH 03820 yourEngine flioo1 G IOw MIUGUE 1/eA Vat Scale Power Usable Power Greater Economy Send 4O & Stamped Addressed Envelope Dealer Inquiry Invited Davis Diesel Development Inc Box 141 Milford CT 06460
Edition: Model Aviation - 1980/07
Page Numbers: 35, 116, 117
SOARING Dan Pruss difference between first place just being therecovered beauty Rob Nelson Fresno CA came Robs suggestion simple Tape small 2- suggestion would make landings look like 22-in long piece 1/16 square balsa landingsif wanted earn points nose plane such way anything Robs idea might impractical flaired landing will break balsa large size contest would have merit least balsa broken landingno landing points club levelespecially boilerplate specials plane 100 point spot would out-survive somebody elses gossamer- Continued page 116 SNO Fly 1980 few contests gets yearly recognition perhaps size held dead winter winter temperatures just make funis Greater Detroit Soaring Hiking Societys Annual Sno Fly contest has just few people planning winter leisure time around few others trek couple hundred miles take year 5 1 thermal seekers showed up hopes getting three 7-minute mazes weather would make brass monkey cringe According Warren Tiahrt contest director weather classicplenty cold just enough wind test ones constitution Tempera tures ranged 50F briefing time 200F final round snow flurry did show up just make everything legal 10-15 mph winds extended building season few notso-lucky fliers Top Fivewith some nationally familiar names Unlimited Class 1Dave Corven1202 2Chris Corven1101 3Jim Bohmer1012 4Bob Robinson998 5Pat Flinn978 Standard Class 1Ray Hayes1014 2Eric Podzielinski1019 3Dale Martell900 4Walt Hill848 5Bill Doyle814 Two-Meter 1Mike Fritz73 2John Humphreys665 3Dave Henshaw645 4Jerry Mrlik589 5Jeff Mrlik464 event Unlimited Standard Two-Meter classes Tiahrt reported Two-Meter class did quite wellagainst twometer birds also pointed out 5 1 entrants individual contestants entry allowed per flier bad contest nobody looks shade tree Spot landings As long contests spot landings will what lexicon sailplaners refers dork landings probably have suggestions eliminate unsailplane-like maneuver fliers Most suggestions past designed around de-emphasizing point value landings ideas worked Reason quarter point could earn landing could bet tight duration contest someone would punch spot quarter point July 1980 35 have peiformed everything except landing go back try maneuver again will give feeling continuity about flight will make comfortable step before judges Its also good idea practice help caller because thats way will contest caller can provide suggestions can improve caller will often see things wrong maneuver pilot didnt notice caller can also suggest improvement framing maneuver front judges getting airplane proper heading way pilot tells judges what doing very important judges know exactly whats going Its always good idea call maneuvers during practice its new strange thing contest youve got enough other things mind recommend calling sequence follows after maneuver complete caller tells pilot what maneuver next pilot tells judges before during turnaround After turnaround pilot informs judges airplane heading next maneuver pilot should call start completion maneuver proper times typical sequence might 1 next maneuver will Immelmann Turn 2 heading MAMMOTH SCALERS r have available ccuplete Jam Inesvazta aml rojfflers ,at 90 334718 hita a2og Quarter PS USE 12221 Sm Igmeim Ca 5*112 Immelmann Turn 3 maneuver beginning now 4 Maneuver complete think pilot should stand upwind judges have better chance hearing him flight line usually noisy place flight circle being used pilot upwind wind will blow voice back judges rather away pilots attitude toward judges also important feel pilots duty present flight can judged fairly impartially talking up down judges Extraneous comments quality maneuvers should avoided Dont apologize bad maneuver pat yourself back good judges will tell what thought about opinions important ones anyway Remember getting ready contest success pattern competition largely function preparations went Luck has very little results Ron Van Putte 12 Connie Drive Shalimar FL 32579 SAFE FLYING IS NO ACCIDENT RC SOARING/PR USS Co ntinued page 35 IBALSA SQ 16 TAPE- NOSE OF PLANE THIS DISTANCE WOULD BE THE SAME FOR ALL PLANES Ron Nelsons smoothlanding detector Rob suggests balsa taped nose distance end balsa ground would same airplane no matter what nose shape idea might present couple problems organizers its worth trying local level Large scale Last month some pics details passed gave impression what happening Europe 1/5 scale sailplane world Well lot us thinking compact cars two-meter easy-totote flying machines small group modelers turning out birds would find themselves suffering hangar rash 20-foot motor home Theres SB-9 availableready Data Wingspan 733 meters fuselage length 25 meters all-up weight 75 kilograms Fuselage epoxy molded wing foam core wood covering Airfoil Eppler 203 Cost 800 DM around $500 Germany does fly guess its like gent 600-pound gorilla asked walked Anywhere wanted SB-9 designed primarily slope flying birds size flying usually day weekend outing guess could say its like getting fill scale soaring scale bird far less 1/3 costnow convince wife Soar Gull gull-wing sailplane pictured month Duane Eisenbeiss Duane isnt flying United Airlines hes flying own full size Standard Cirrus its above hes drawing building board arent necessarily order priorities its what tells boss According Duane plane designed look different easy fly Theres no question its distinct feaures plane easy spot gaggle homing same thermal Duane says gull wing used mostly appearance does however cause wings lifting force act well above fuselage thereby contributing positive stability through pendulum effect Duane also says two control surfaces should have less drag three fore V chosen V tail also lighter weight savings tail plus factor design Soar Gull has over 150 flights results have beyond drawing board hopes Its 100 inches wingspan weighs 55 ounces has empty wing loading 88 ounces per square foot two-piece V tail slides onto wooden 116 Model Aviation REALISMSCALE ACCESSORIES TY WILLIAMS BROTHERS RADIO CONTROL SCALE PILOTS E WHEELS CONTROL-LINECYLINDERS ENGINE KITS MACHINE GUN KITS FREE-FLIGHT TIC DISPLAY MODELS SEND $1 FOR COMPLETE ILLUSTRATED CATALOG DEPT MA 181 PAWNEE STREET SAN MARCOS CA 9 u OIlY VTHE NEW FIREBALL GLOW PLUGS ARE LEAKPROOF AND BLOWOUT PROOF EVEN FOR THE NEW MONSTER ENGINES BUT THEY ARE STILL THE OLD PRICE OF$1 10 WRITE NOW! SWANSON PO Box 151liZ Wayn eN 07470 XECUTIVE CORP AmItyvIll NY 11701 FAI team selection program Its again well underway time read Subject vote program entrants Team Finals will Pensacola FL excellent flying site over Labor Day weekend Rae Fritz excellent contest director will keep everybody honest Its guaranteed excitement worth watching cant compete outcome Second World Championships last year Belgium surely will have influence designs year So want see what F3B about see some designs dreams year ago think PensacolaLabor Day further information program contact Ray Marvin 2781 South Garfield Denver CO 80210 Lets go flying Dan Pruss RR 2 Box 490 Plainfield IL 60544 RC HELICOPTERS/CHESNEY co ntinued page 36 quired pull wing through air fast enough get plane air keep same true helicopterbut airplane drag largely result induced drag creating lift plus parasitic profile drag caused resistance bumps lumps like wheels canopies other junk sticking out airstream helicop ter also subject mechanical drag Powerrobbing drag bad enough binds helicopter gear train course binds running friction factor mechanics drive system should assembled carefully reduce friction Now succeed overcoming drag gravity get helicopter airplane moving forward flight similarities control response can checked out See Figure 2 airplane controlled about roll axis its ailerons increasing decreasing lift ofeach wing tip opposite other helicopter control similar ailerons called right/left cyclic lateral cyclic So roll bank airplane move aileron stick helicopter rolled banked using cycliclateral cyclic pitch axisthe airplane controlled elevator down elevator causes nose drop up elevator nose rise copter friend cyclic back again now forelaft cyclic longitudinal cyclic Longi tudinal cyclic causes helicopter nose pitch down forward command up aft command remember forward flight right now forward flight helicopter tail rotor similar rudder airplane both control yaw nose aircraft right left Right stick right yaw left stick left yaw airplane note some RC heli copter fliers set control linkage tail rotor right stick gives left nose right tail boom movement like fullscale helicopter Reasons changing tail rotor control will become apparent begin flight training set up normal yaw initially examples flight control similarity aircraft moving forward through air An airplane motion through air called parked tied-downmaybe crashed airplane must moving forward against relative airflow speed sufficient provide lift overcome gravity helicopter may indeed stop move rearward sideways because engine-driven rotating wings provide relative airflow helicopter will lifted off ground engine power rotor pitch set blades rotating against relative wind such way provide enough lift overcome gravity no other forces acting helicopter will hover Now lateral longitudinal cyclic controls may used slide helicopter laterally left right longi tudinally forward rearward tail rotor must used yaw control also keep fuselage spinning around against rotation main rotor Well get back tail rotor later now what cyclic pitch rotor blades Cyclic pitch changes responsible lateral longitudinal movement helicopter An application cyclic control causes pitch blade change opposite other effect blade will oscillate fixed collective pitch setting through positive relative pitch back collective reference pitch relative negative pitch setting back reference collective pitch setting highest lowest relative pitch positions blade will determined position cyclic stick Keep mind blade reaches its highest pitch opposite blade will its lowest pitch excursion blade during revolution like sine wave See Figure 3 Next month will have about cyclic collective pitch rotor head swash plate Dave Chesney Rt 9 Box 621A Greensboro NC 27409 CL BEECHCRAFT/HAUGHT continued page 40 made Instruct helper watch excessive outward yaw unlevel wings will able notice things circles center well another opinion always useful Too much outward yaw causes excessive line tension can see top bottom wings indicates correction needed Both conditions may alleviated relocating leadout guide see tops wings lower guide too much outward yaw move guide forward etc tail heavy model will too difficult control Too much nose weight makes model too sluggish controls too sensitive move pushrod bellcrank down elevator horn etc Level flight boring will find Beech fully aerobatic Loops basic maneuver Most beginners hold fixed amount too much up resulting mushy loop Try varying control throughout loop making big round Lazy eights logical progression inverted flight Begin normal loop neutral ize controls kr way through loop hesitating split second model its back shallow dive give down elevator come around end eight returning level flight Practice lazy eights extending inverted protion until achieve magical first lap inverted flight its merely matter practice Soon youll able tolerate lap upright level flight row Staggerwing SAFE FLYING IS NO ACCIDENT July 1980 117 Deep uselag full cabin b flight capability 112 40 to 60 EngInes igepan dowels lightness movable tail ORGANIZED surfaces actuated movable stubsHee S set 4 sturdy fries hoS OVer fit tail Soar Gull only4 years Vt favorite 8 11 magazirtes different its package clever innovations 4 MAG FILES $495 linkages designsend 5495 plus St 00 postage handtrrrg DON INDUSTRIES P0 BOX 388-K DOVER NH 03820 yourEngine flioo1 G IOw MIUGUE 1/eA Vat Scale Power Usable Power Greater Economy Send 4O & Stamped Addressed Envelope Dealer Inquiry Invited Davis Diesel Development Inc Box 141 Milford CT 06460
Edition: Model Aviation - 1980/07
Page Numbers: 35, 116, 117
SOARING Dan Pruss difference between first place just being therecovered beauty Rob Nelson Fresno CA came Robs suggestion simple Tape small 2- suggestion would make landings look like 22-in long piece 1/16 square balsa landingsif wanted earn points nose plane such way anything Robs idea might impractical flaired landing will break balsa large size contest would have merit least balsa broken landingno landing points club levelespecially boilerplate specials plane 100 point spot would out-survive somebody elses gossamer- Continued page 116 SNO Fly 1980 few contests gets yearly recognition perhaps size held dead winter winter temperatures just make funis Greater Detroit Soaring Hiking Societys Annual Sno Fly contest has just few people planning winter leisure time around few others trek couple hundred miles take year 5 1 thermal seekers showed up hopes getting three 7-minute mazes weather would make brass monkey cringe According Warren Tiahrt contest director weather classicplenty cold just enough wind test ones constitution Tempera tures ranged 50F briefing time 200F final round snow flurry did show up just make everything legal 10-15 mph winds extended building season few notso-lucky fliers Top Fivewith some nationally familiar names Unlimited Class 1Dave Corven1202 2Chris Corven1101 3Jim Bohmer1012 4Bob Robinson998 5Pat Flinn978 Standard Class 1Ray Hayes1014 2Eric Podzielinski1019 3Dale Martell900 4Walt Hill848 5Bill Doyle814 Two-Meter 1Mike Fritz73 2John Humphreys665 3Dave Henshaw645 4Jerry Mrlik589 5Jeff Mrlik464 event Unlimited Standard Two-Meter classes Tiahrt reported Two-Meter class did quite wellagainst twometer birds also pointed out 5 1 entrants individual contestants entry allowed per flier bad contest nobody looks shade tree Spot landings As long contests spot landings will what lexicon sailplaners refers dork landings probably have suggestions eliminate unsailplane-like maneuver fliers Most suggestions past designed around de-emphasizing point value landings ideas worked Reason quarter point could earn landing could bet tight duration contest someone would punch spot quarter point July 1980 35 have peiformed everything except landing go back try maneuver again will give feeling continuity about flight will make comfortable step before judges Its also good idea practice help caller because thats way will contest caller can provide suggestions can improve caller will often see things wrong maneuver pilot didnt notice caller can also suggest improvement framing maneuver front judges getting airplane proper heading way pilot tells judges what doing very important judges know exactly whats going Its always good idea call maneuvers during practice its new strange thing contest youve got enough other things mind recommend calling sequence follows after maneuver complete caller tells pilot what maneuver next pilot tells judges before during turnaround After turnaround pilot informs judges airplane heading next maneuver pilot should call start completion maneuver proper times typical sequence might 1 next maneuver will Immelmann Turn 2 heading MAMMOTH SCALERS r have available ccuplete Jam Inesvazta aml rojfflers ,at 90 334718 hita a2og Quarter PS USE 12221 Sm Igmeim Ca 5*112 Immelmann Turn 3 maneuver beginning now 4 Maneuver complete think pilot should stand upwind judges have better chance hearing him flight line usually noisy place flight circle being used pilot upwind wind will blow voice back judges rather away pilots attitude toward judges also important feel pilots duty present flight can judged fairly impartially talking up down judges Extraneous comments quality maneuvers should avoided Dont apologize bad maneuver pat yourself back good judges will tell what thought about opinions important ones anyway Remember getting ready contest success pattern competition largely function preparations went Luck has very little results Ron Van Putte 12 Connie Drive Shalimar FL 32579 SAFE FLYING IS NO ACCIDENT RC SOARING/PR USS Co ntinued page 35 IBALSA SQ 16 TAPE- NOSE OF PLANE THIS DISTANCE WOULD BE THE SAME FOR ALL PLANES Ron Nelsons smoothlanding detector Rob suggests balsa taped nose distance end balsa ground would same airplane no matter what nose shape idea might present couple problems organizers its worth trying local level Large scale Last month some pics details passed gave impression what happening Europe 1/5 scale sailplane world Well lot us thinking compact cars two-meter easy-totote flying machines small group modelers turning out birds would find themselves suffering hangar rash 20-foot motor home Theres SB-9 availableready Data Wingspan 733 meters fuselage length 25 meters all-up weight 75 kilograms Fuselage epoxy molded wing foam core wood covering Airfoil Eppler 203 Cost 800 DM around $500 Germany does fly guess its like gent 600-pound gorilla asked walked Anywhere wanted SB-9 designed primarily slope flying birds size flying usually day weekend outing guess could say its like getting fill scale soaring scale bird far less 1/3 costnow convince wife Soar Gull gull-wing sailplane pictured month Duane Eisenbeiss Duane isnt flying United Airlines hes flying own full size Standard Cirrus its above hes drawing building board arent necessarily order priorities its what tells boss According Duane plane designed look different easy fly Theres no question its distinct feaures plane easy spot gaggle homing same thermal Duane says gull wing used mostly appearance does however cause wings lifting force act well above fuselage thereby contributing positive stability through pendulum effect Duane also says two control surfaces should have less drag three fore V chosen V tail also lighter weight savings tail plus factor design Soar Gull has over 150 flights results have beyond drawing board hopes Its 100 inches wingspan weighs 55 ounces has empty wing loading 88 ounces per square foot two-piece V tail slides onto wooden 116 Model Aviation REALISMSCALE ACCESSORIES TY WILLIAMS BROTHERS RADIO CONTROL SCALE PILOTS E WHEELS CONTROL-LINECYLINDERS ENGINE KITS MACHINE GUN KITS FREE-FLIGHT TIC DISPLAY MODELS SEND $1 FOR COMPLETE ILLUSTRATED CATALOG DEPT MA 181 PAWNEE STREET SAN MARCOS CA 9 u OIlY VTHE NEW FIREBALL GLOW PLUGS ARE LEAKPROOF AND BLOWOUT PROOF EVEN FOR THE NEW MONSTER ENGINES BUT THEY ARE STILL THE OLD PRICE OF$1 10 WRITE NOW! SWANSON PO Box 151liZ Wayn eN 07470 XECUTIVE CORP AmItyvIll NY 11701 FAI team selection program Its again well underway time read Subject vote program entrants Team Finals will Pensacola FL excellent flying site over Labor Day weekend Rae Fritz excellent contest director will keep everybody honest Its guaranteed excitement worth watching cant compete outcome Second World Championships last year Belgium surely will have influence designs year So want see what F3B about see some designs dreams year ago think PensacolaLabor Day further information program contact Ray Marvin 2781 South Garfield Denver CO 80210 Lets go flying Dan Pruss RR 2 Box 490 Plainfield IL 60544 RC HELICOPTERS/CHESNEY co ntinued page 36 quired pull wing through air fast enough get plane air keep same true helicopterbut airplane drag largely result induced drag creating lift plus parasitic profile drag caused resistance bumps lumps like wheels canopies other junk sticking out airstream helicop ter also subject mechanical drag Powerrobbing drag bad enough binds helicopter gear train course binds running friction factor mechanics drive system should assembled carefully reduce friction Now succeed overcoming drag gravity get helicopter airplane moving forward flight similarities control response can checked out See Figure 2 airplane controlled about roll axis its ailerons increasing decreasing lift ofeach wing tip opposite other helicopter control similar ailerons called right/left cyclic lateral cyclic So roll bank airplane move aileron stick helicopter rolled banked using cycliclateral cyclic pitch axisthe airplane controlled elevator down elevator causes nose drop up elevator nose rise copter friend cyclic back again now forelaft cyclic longitudinal cyclic Longi tudinal cyclic causes helicopter nose pitch down forward command up aft command remember forward flight right now forward flight helicopter tail rotor similar rudder airplane both control yaw nose aircraft right left Right stick right yaw left stick left yaw airplane note some RC heli copter fliers set control linkage tail rotor right stick gives left nose right tail boom movement like fullscale helicopter Reasons changing tail rotor control will become apparent begin flight training set up normal yaw initially examples flight control similarity aircraft moving forward through air An airplane motion through air called parked tied-downmaybe crashed airplane must moving forward against relative airflow speed sufficient provide lift overcome gravity helicopter may indeed stop move rearward sideways because engine-driven rotating wings provide relative airflow helicopter will lifted off ground engine power rotor pitch set blades rotating against relative wind such way provide enough lift overcome gravity no other forces acting helicopter will hover Now lateral longitudinal cyclic controls may used slide helicopter laterally left right longi tudinally forward rearward tail rotor must used yaw control also keep fuselage spinning around against rotation main rotor Well get back tail rotor later now what cyclic pitch rotor blades Cyclic pitch changes responsible lateral longitudinal movement helicopter An application cyclic control causes pitch blade change opposite other effect blade will oscillate fixed collective pitch setting through positive relative pitch back collective reference pitch relative negative pitch setting back reference collective pitch setting highest lowest relative pitch positions blade will determined position cyclic stick Keep mind blade reaches its highest pitch opposite blade will its lowest pitch excursion blade during revolution like sine wave See Figure 3 Next month will have about cyclic collective pitch rotor head swash plate Dave Chesney Rt 9 Box 621A Greensboro NC 27409 CL BEECHCRAFT/HAUGHT continued page 40 made Instruct helper watch excessive outward yaw unlevel wings will able notice things circles center well another opinion always useful Too much outward yaw causes excessive line tension can see top bottom wings indicates correction needed Both conditions may alleviated relocating leadout guide see tops wings lower guide too much outward yaw move guide forward etc tail heavy model will too difficult control Too much nose weight makes model too sluggish controls too sensitive move pushrod bellcrank down elevator horn etc Level flight boring will find Beech fully aerobatic Loops basic maneuver Most beginners hold fixed amount too much up resulting mushy loop Try varying control throughout loop making big round Lazy eights logical progression inverted flight Begin normal loop neutral ize controls kr way through loop hesitating split second model its back shallow dive give down elevator come around end eight returning level flight Practice lazy eights extending inverted protion until achieve magical first lap inverted flight its merely matter practice Soon youll able tolerate lap upright level flight row Staggerwing SAFE FLYING IS NO ACCIDENT July 1980 117 Deep uselag full cabin b flight capability 112 40 to 60 EngInes igepan dowels lightness movable tail ORGANIZED surfaces actuated movable stubsHee S set 4 sturdy fries hoS OVer fit tail Soar Gull only4 years Vt favorite 8 11 magazirtes different its package clever innovations 4 MAG FILES $495 linkages designsend 5495 plus St 00 postage handtrrrg DON INDUSTRIES P0 BOX 388-K DOVER NH 03820 yourEngine flioo1 G IOw MIUGUE 1/eA Vat Scale Power Usable Power Greater Economy Send 4O & Stamped Addressed Envelope Dealer Inquiry Invited Davis Diesel Development Inc Box 141 Milford CT 06460