U Simulates Propos Since RC dynamically similar models actual aircraft have proved worth flight testing author reasoned proposed circular wing air craft should fly similar RC test model Design changes found necessary model would save money time point way successful full-scale prototype IF RC SCALE models full-sized air craft can flown prototypically could full-size projected aircraft cir cular wing flown like scale RC model design challenge met using RC techniques some own innovations build fly Reduced Scale Prototype Aircraft Model RSPAM short Circular wing aircraft rare breed Though well known circular wing does have bit history Circular flying wings patented 1904 11 25 26 40s Flying Flapjack flown Navy XF5U-1 built HA Richard Akelewicz Above Star Wars nothing ith nut aerodynamicists win nave tiela day multiplicity design features incorporated two RC test jobs Foreground RSPAM 3 rear RSPAM 2 See text relationships full-scale Aurigas Below Author Dick Akelewicz 20 Model Aviation ed Full-Scale Design.. 1 RSPAM 3 showing difference thickness between center snd outboard portions wing airflow fences between 2 Center wing section fences tail structure form open-type wind tunnel 3 model suspended slow-fly-by attitude Stripes aid visual observation aircraft flight angle modeler 41 years Dick has flown Wildcat Hellcat Corsair F-Ba FJ-2 jets design-detailer Curtis Kissinger stress analysis engineer sales engineering AMAer Dick Ryan RC pioneer performed test pilot program put pasture new breed aircraft jet Undaunted history perhaps inspired Curtis Kissinger experi mented circular wing concept patented version 1958 After oneman glider wind tunnel tests CL-RC combination model RSPAM 1 improved version patent issued 1975 RSPAM built after Curtis collaborated build RC model taking control lines out CL-RC com bination using newer RC equip ment available originally pro jected aircraft named Charioteer full-scale projected aircraft circular wing design appears unusual fact aircraft surely flies way aircraft should RSPA Ms prove projected aircraft two-place sport design slightly modified circu lar wing RSPAM very stable flight modes full control Short takeoff landing low speed stand ard mode will pilots choice Capa ble very slow flight will have rela tively high speed economical cruise will stall spin 18-ft wing span will have very large wing area respectable glide Its acro batic exception stalls spins AURIGA Ilits counterpart RC model RSPAM 3 Also envisioned four-place version hav ing same characteristics acro batic designed short mid-range economic travel Wing span will 21 ft AURIGA Iits counterpart RC model RSPAM 2 Prior two Charioteer/ RSPAM 1 also intended have 21-ft wing span original venture manned experimental aircraft p05 sible RPV application RSPAM 1 pro vided us visible proof circular wing actual flight sustained venture using RC models flight testing model showed us big air plane would fly intended quickly pointed out some design areas improve ment Easily modified matched phases flight tests exceeded flight characteristics claimed real aircraft Due unforseen circumstances beyond control other RC testing prototype has delayed carry work redesigned Charioteer RSPAM 1 private type aircraft Thus AURIGA I/RSPAM 2 AURIGA II/RSPAM 3 relatively few years ago idea gathering sufficient data new design usually went route Curtiss did sketches models gliders engineering wind tunnel tests Hopefully prototype would fly well Since circular wing departure standard type wing cringed idea building flying although data engineering said would fly aero model publications time shown through various articles modelers using full-house scale models already duplicating de gree some real aircraft flying char acteristics So could same worst could lose model real aircraft As turned out able fly flight envelope design gained experience RSPA Ms first strictly RC model RSPAM 1 April1978 21 4 simulated slow-flight attitude positive control control deflections different weights angle attitudes could observed during flight tests 5 Cruise attitude showing tail feathers Fence/fin structure provides air flow carries aft wing tail loads wing spars 6 Large wing area short span permits lighter loadings per scale sq ft hp per weight low-pressure wind-tunnel feature reduces power required power fails nose high attitude shown lowering nose bit enables controlled descent built Charioteer drawing drafted 1/7th scale Incorporated data design features experi ence up time Weight area volumes reduced scale chosen copy drawing re vised convert RC scale model produced size large enough tests small enough changes required Subsequently RSPAM 2 3 treated like manner problem area scale building wing center section airfoil being thinner depth shorter chord outboard wing section airfoil series used however thick enough permit spar good depth outboard aft portion wing area needed support Two sub spars added forward aft main spar fence side center wing designed air flow re designed provide structural support trailing edge area wing tail assembly explore design RC fully possible weight compartments added nose C G locations variable weight nose permitted CG varied considerably fore aft design called drastically relocated C G positions controllable circular wing design tolerance thought cen ter variable weight permitted changes wing loading suit various design mode requirements well compensate nose-weight changes calculated wing tail thrust cidence angles varied other com binations RSPAM 2 building models sections allowed set ting pins fence outboard-wing junc tion inserted pre-drilled holes different angles outboard wing held place nylon bolt end spar bulkhead built wing spars placed built-in channels type testing desired prototypes would prohibitive cost RSPAM series movies flight photos sound recordings verbal tape reports used Visual observations field glasses aided in-flight progress angle studies observation stripes placed RSPAM specific angles later incorporated covering design important requirements RC test pilot Such person found RC instructor willing test flying sus pect became involved spirit venture Dick Ryan pioneer RC flier has appreciation admiration Bill Marham another team member did outstanding job mechanic maintain ing RC equipment refueling RSPAMs between flights permitted pilot designer review last flight prepare next flight tests scheduled seg ments rather complete running se quence allowing test pilot feel out modelpractice will After warm-up would perform prearranged segment series segments pro grams consisted climbs level flights turns altitude changes Takeoffs landings approaches climb-outs stalls spins careful study transition mushing recovery since design will spin stall various C G wing loading changes RSPAMs space limits few other test features built RSPAMs Some successful some notbut know what will Wing slots flap center wing outboard wing suction stabila tor some items RSPAM plus RC tells story very well indeed Without advances RC has made tested RSPAMs venture would have possible prototype AURIGA II much closer reality believe will reflect RSPAM 3 perhaps well build RC scale model 22 Model Aviation EOH'5 5A5Iif5ALC Continued page 84 RSPAM 1 forerunner RC Charioteer did primary air work proved value using RC design testing Model full circular wing OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st NC Advanced let NC Novice 1st NC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stuns Junior 1st CL Combat Op & Sr let CL Slom Comb Op & Sr 1st CL Carrier II Op Jr Sr let CL Carrier Jr & Sr 1st CL Class D Speed Open 1st CL Class C Speed Jr & Sr let CLCIassB Speed Op & Sr let CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st FF Class B Open let PP Clam C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES QF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 Foe RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3489 63489 733%4119 83%45B129 94566% 77139 10467149 106W 8W149 10BEst159 114677% 7% 7% 8159 11BEW169 11%67169 126179 125W179 1356219 145 6249 1556309 164% 6389 5ll WIDE BLADE 6W EXTRA WIDE SERIES 4008 FOR SPEED NG ADVANCED DESIGN ND 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OP ALL TIMES AC PYLON RACING DIA PITCHPR ICE 5%3Y4129 755%6149 7SN 5%N 6N149 8%6%6%7 7%7%189 96%7 7A7%189 CONTROL LINE SPEEO& RACING DIA PITCH PRICE 4%6A7129 4555%129 6788%149 77A1OA11169 899189 89N 9/N189 8%77%189 912 13219 N NARROW model continued interest model itself fullscale prototype looks like some has worn off already Word has Dick Buck now flying Bob Hiseys ships Toledo Weak Signals field Welcome scale Radio Technique/Myers continued page 79 retain well-known highly-regarded Pro-line fine tuning variety servos offered sys tem has PLS-l great gener al purpose size small light enough satisfactory 1/2A racer yet strong enough control piped-60 pattern model older Pro-line servos compatible new system arent obsolete just because newer system being manufactured Which nice way treat customers Some people want lessless weight smaller dimensions Fig 4 shows Kraft satisfying desire 12 oun ces KPS-18 smaller Cannon Mini Like leather upholstery custom-built car servo feels sounds quality its 30000-rpm motor tiny output wheel jewel work art isnt cheap once again get what pay Ive yet see larger servo pre cise its centering balanced its action Bob Aberle proud owner hes feeling good lets look tie ribbon discussion American manufacturers still offer lot quality plenty variety Before buy ing cheapest thing thats offered give Made America serious thought pay what get what get RC Simulates/Akelewicz continued page 22 RC RSPAMs RSPAM 1/Charioteer rimental Wing span 36 diameter Length 48 Weight 7 10 lbs K&B 40 RSPAM 2/AURIGA Private type 4passenger Wing span modified 42 diameter Length 49 Weight 7 11 lbs K&B 40 Supertigre 46 RSPAM 3/AURIGA II Private type two place Wing span modified 36 diameter Length 411/2 Weight 5 9 lbs K&B 40 Fuselage mainframes thin plywood Balsa No land urethane foam contour No 2 3 Wings urethane foam No 1 2 Styrofoam meat tray ribs capstrips No 3 Covering three colored polymer heat-shrink film RC equipment MRC 5-channel No 3 RS Systems 6-channel No 2 Comments welcome SASE would appreciated would like reply RC Scale/Wischers continued page 24 area 165 ounces per sq ft lightly loaded plane Choosing Contest Model collec tion have four WW planes Sopwith 1 Strutter Bristol M-l monoplane Nieuport 27 Nicuport 17 lightly built Sopwith extremely light detailed plane having wing loading 136 ounces per sq ft planes well Douglas have problem high wind because pepetration poor due over-abundance drag worse handling gusts ground turbulence because low wing loadings airplane has light wing loading its stalling speed same less wind velocity diffi cult handle realistically takeoff landing will lift off short run its landings have no roll-out after touching down result re motely realistic leads conclu sion true realism will-o-the-wisp attainable under ideal conditions sel dom found contests Sailplanes because clean aerodynamically usual ly successful overcoming adverse conditions ballast penetration Under ideal conditions World War planes joy fly cannot sensi bly use Nats hoping lucky flight before easy judges know some flight scores may little half what re quired stake 1977 Nats chance represent US next World Championships needed therefore minimize luck element especially true warned beforehand strong wind could expected Riverside during Twin Stik Trainer 19 30-size engines twin has exceptional single-engine per formance proven docile flying character istiCs long-popular Stik series multichannel kits should make Twin Stik Train er easy handle twin can cluded kit two lightweight aluminum engine mounts nylon blocks preformed landing gear molded nylon steerable nose gear bearing hinges etc Span 54 4-channels $4995 Midwest Products Co 400 5 Indiana St Hobart IN 46342 product review product review product review 84 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula Ii 125 RevUp 8%-6% new Pylon Rac ing propl Droduct review product review product review
Edition: Model Aviation - 1978/04
Page Numbers: 20, 21, 22, 84
U Simulates Propos Since RC dynamically similar models actual aircraft have proved worth flight testing author reasoned proposed circular wing air craft should fly similar RC test model Design changes found necessary model would save money time point way successful full-scale prototype IF RC SCALE models full-sized air craft can flown prototypically could full-size projected aircraft cir cular wing flown like scale RC model design challenge met using RC techniques some own innovations build fly Reduced Scale Prototype Aircraft Model RSPAM short Circular wing aircraft rare breed Though well known circular wing does have bit history Circular flying wings patented 1904 11 25 26 40s Flying Flapjack flown Navy XF5U-1 built HA Richard Akelewicz Above Star Wars nothing ith nut aerodynamicists win nave tiela day multiplicity design features incorporated two RC test jobs Foreground RSPAM 3 rear RSPAM 2 See text relationships full-scale Aurigas Below Author Dick Akelewicz 20 Model Aviation ed Full-Scale Design.. 1 RSPAM 3 showing difference thickness between center snd outboard portions wing airflow fences between 2 Center wing section fences tail structure form open-type wind tunnel 3 model suspended slow-fly-by attitude Stripes aid visual observation aircraft flight angle modeler 41 years Dick has flown Wildcat Hellcat Corsair F-Ba FJ-2 jets design-detailer Curtis Kissinger stress analysis engineer sales engineering AMAer Dick Ryan RC pioneer performed test pilot program put pasture new breed aircraft jet Undaunted history perhaps inspired Curtis Kissinger experi mented circular wing concept patented version 1958 After oneman glider wind tunnel tests CL-RC combination model RSPAM 1 improved version patent issued 1975 RSPAM built after Curtis collaborated build RC model taking control lines out CL-RC com bination using newer RC equip ment available originally pro jected aircraft named Charioteer full-scale projected aircraft circular wing design appears unusual fact aircraft surely flies way aircraft should RSPA Ms prove projected aircraft two-place sport design slightly modified circu lar wing RSPAM very stable flight modes full control Short takeoff landing low speed stand ard mode will pilots choice Capa ble very slow flight will have rela tively high speed economical cruise will stall spin 18-ft wing span will have very large wing area respectable glide Its acro batic exception stalls spins AURIGA Ilits counterpart RC model RSPAM 3 Also envisioned four-place version hav ing same characteristics acro batic designed short mid-range economic travel Wing span will 21 ft AURIGA Iits counterpart RC model RSPAM 2 Prior two Charioteer/ RSPAM 1 also intended have 21-ft wing span original venture manned experimental aircraft p05 sible RPV application RSPAM 1 pro vided us visible proof circular wing actual flight sustained venture using RC models flight testing model showed us big air plane would fly intended quickly pointed out some design areas improve ment Easily modified matched phases flight tests exceeded flight characteristics claimed real aircraft Due unforseen circumstances beyond control other RC testing prototype has delayed carry work redesigned Charioteer RSPAM 1 private type aircraft Thus AURIGA I/RSPAM 2 AURIGA II/RSPAM 3 relatively few years ago idea gathering sufficient data new design usually went route Curtiss did sketches models gliders engineering wind tunnel tests Hopefully prototype would fly well Since circular wing departure standard type wing cringed idea building flying although data engineering said would fly aero model publications time shown through various articles modelers using full-house scale models already duplicating de gree some real aircraft flying char acteristics So could same worst could lose model real aircraft As turned out able fly flight envelope design gained experience RSPA Ms first strictly RC model RSPAM 1 April1978 21 4 simulated slow-flight attitude positive control control deflections different weights angle attitudes could observed during flight tests 5 Cruise attitude showing tail feathers Fence/fin structure provides air flow carries aft wing tail loads wing spars 6 Large wing area short span permits lighter loadings per scale sq ft hp per weight low-pressure wind-tunnel feature reduces power required power fails nose high attitude shown lowering nose bit enables controlled descent built Charioteer drawing drafted 1/7th scale Incorporated data design features experi ence up time Weight area volumes reduced scale chosen copy drawing re vised convert RC scale model produced size large enough tests small enough changes required Subsequently RSPAM 2 3 treated like manner problem area scale building wing center section airfoil being thinner depth shorter chord outboard wing section airfoil series used however thick enough permit spar good depth outboard aft portion wing area needed support Two sub spars added forward aft main spar fence side center wing designed air flow re designed provide structural support trailing edge area wing tail assembly explore design RC fully possible weight compartments added nose C G locations variable weight nose permitted CG varied considerably fore aft design called drastically relocated C G positions controllable circular wing design tolerance thought cen ter variable weight permitted changes wing loading suit various design mode requirements well compensate nose-weight changes calculated wing tail thrust cidence angles varied other com binations RSPAM 2 building models sections allowed set ting pins fence outboard-wing junc tion inserted pre-drilled holes different angles outboard wing held place nylon bolt end spar bulkhead built wing spars placed built-in channels type testing desired prototypes would prohibitive cost RSPAM series movies flight photos sound recordings verbal tape reports used Visual observations field glasses aided in-flight progress angle studies observation stripes placed RSPAM specific angles later incorporated covering design important requirements RC test pilot Such person found RC instructor willing test flying sus pect became involved spirit venture Dick Ryan pioneer RC flier has appreciation admiration Bill Marham another team member did outstanding job mechanic maintain ing RC equipment refueling RSPAMs between flights permitted pilot designer review last flight prepare next flight tests scheduled seg ments rather complete running se quence allowing test pilot feel out modelpractice will After warm-up would perform prearranged segment series segments pro grams consisted climbs level flights turns altitude changes Takeoffs landings approaches climb-outs stalls spins careful study transition mushing recovery since design will spin stall various C G wing loading changes RSPAMs space limits few other test features built RSPAMs Some successful some notbut know what will Wing slots flap center wing outboard wing suction stabila tor some items RSPAM plus RC tells story very well indeed Without advances RC has made tested RSPAMs venture would have possible prototype AURIGA II much closer reality believe will reflect RSPAM 3 perhaps well build RC scale model 22 Model Aviation EOH'5 5A5Iif5ALC Continued page 84 RSPAM 1 forerunner RC Charioteer did primary air work proved value using RC design testing Model full circular wing OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st NC Advanced let NC Novice 1st NC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stuns Junior 1st CL Combat Op & Sr let CL Slom Comb Op & Sr 1st CL Carrier II Op Jr Sr let CL Carrier Jr & Sr 1st CL Class D Speed Open 1st CL Class C Speed Jr & Sr let CLCIassB Speed Op & Sr let CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st FF Class B Open let PP Clam C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES QF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 Foe RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3489 63489 733%4119 83%45B129 94566% 77139 10467149 106W 8W149 10BEst159 114677% 7% 7% 8159 11BEW169 11%67169 126179 125W179 1356219 145 6249 1556309 164% 6389 5ll WIDE BLADE 6W EXTRA WIDE SERIES 4008 FOR SPEED NG ADVANCED DESIGN ND 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OP ALL TIMES AC PYLON RACING DIA PITCHPR ICE 5%3Y4129 755%6149 7SN 5%N 6N149 8%6%6%7 7%7%189 96%7 7A7%189 CONTROL LINE SPEEO& RACING DIA PITCH PRICE 4%6A7129 4555%129 6788%149 77A1OA11169 899189 89N 9/N189 8%77%189 912 13219 N NARROW model continued interest model itself fullscale prototype looks like some has worn off already Word has Dick Buck now flying Bob Hiseys ships Toledo Weak Signals field Welcome scale Radio Technique/Myers continued page 79 retain well-known highly-regarded Pro-line fine tuning variety servos offered sys tem has PLS-l great gener al purpose size small light enough satisfactory 1/2A racer yet strong enough control piped-60 pattern model older Pro-line servos compatible new system arent obsolete just because newer system being manufactured Which nice way treat customers Some people want lessless weight smaller dimensions Fig 4 shows Kraft satisfying desire 12 oun ces KPS-18 smaller Cannon Mini Like leather upholstery custom-built car servo feels sounds quality its 30000-rpm motor tiny output wheel jewel work art isnt cheap once again get what pay Ive yet see larger servo pre cise its centering balanced its action Bob Aberle proud owner hes feeling good lets look tie ribbon discussion American manufacturers still offer lot quality plenty variety Before buy ing cheapest thing thats offered give Made America serious thought pay what get what get RC Simulates/Akelewicz continued page 22 RC RSPAMs RSPAM 1/Charioteer rimental Wing span 36 diameter Length 48 Weight 7 10 lbs K&B 40 RSPAM 2/AURIGA Private type 4passenger Wing span modified 42 diameter Length 49 Weight 7 11 lbs K&B 40 Supertigre 46 RSPAM 3/AURIGA II Private type two place Wing span modified 36 diameter Length 411/2 Weight 5 9 lbs K&B 40 Fuselage mainframes thin plywood Balsa No land urethane foam contour No 2 3 Wings urethane foam No 1 2 Styrofoam meat tray ribs capstrips No 3 Covering three colored polymer heat-shrink film RC equipment MRC 5-channel No 3 RS Systems 6-channel No 2 Comments welcome SASE would appreciated would like reply RC Scale/Wischers continued page 24 area 165 ounces per sq ft lightly loaded plane Choosing Contest Model collec tion have four WW planes Sopwith 1 Strutter Bristol M-l monoplane Nieuport 27 Nicuport 17 lightly built Sopwith extremely light detailed plane having wing loading 136 ounces per sq ft planes well Douglas have problem high wind because pepetration poor due over-abundance drag worse handling gusts ground turbulence because low wing loadings airplane has light wing loading its stalling speed same less wind velocity diffi cult handle realistically takeoff landing will lift off short run its landings have no roll-out after touching down result re motely realistic leads conclu sion true realism will-o-the-wisp attainable under ideal conditions sel dom found contests Sailplanes because clean aerodynamically usual ly successful overcoming adverse conditions ballast penetration Under ideal conditions World War planes joy fly cannot sensi bly use Nats hoping lucky flight before easy judges know some flight scores may little half what re quired stake 1977 Nats chance represent US next World Championships needed therefore minimize luck element especially true warned beforehand strong wind could expected Riverside during Twin Stik Trainer 19 30-size engines twin has exceptional single-engine per formance proven docile flying character istiCs long-popular Stik series multichannel kits should make Twin Stik Train er easy handle twin can cluded kit two lightweight aluminum engine mounts nylon blocks preformed landing gear molded nylon steerable nose gear bearing hinges etc Span 54 4-channels $4995 Midwest Products Co 400 5 Indiana St Hobart IN 46342 product review product review product review 84 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula Ii 125 RevUp 8%-6% new Pylon Rac ing propl Droduct review product review product review
Edition: Model Aviation - 1978/04
Page Numbers: 20, 21, 22, 84
U Simulates Propos Since RC dynamically similar models actual aircraft have proved worth flight testing author reasoned proposed circular wing air craft should fly similar RC test model Design changes found necessary model would save money time point way successful full-scale prototype IF RC SCALE models full-sized air craft can flown prototypically could full-size projected aircraft cir cular wing flown like scale RC model design challenge met using RC techniques some own innovations build fly Reduced Scale Prototype Aircraft Model RSPAM short Circular wing aircraft rare breed Though well known circular wing does have bit history Circular flying wings patented 1904 11 25 26 40s Flying Flapjack flown Navy XF5U-1 built HA Richard Akelewicz Above Star Wars nothing ith nut aerodynamicists win nave tiela day multiplicity design features incorporated two RC test jobs Foreground RSPAM 3 rear RSPAM 2 See text relationships full-scale Aurigas Below Author Dick Akelewicz 20 Model Aviation ed Full-Scale Design.. 1 RSPAM 3 showing difference thickness between center snd outboard portions wing airflow fences between 2 Center wing section fences tail structure form open-type wind tunnel 3 model suspended slow-fly-by attitude Stripes aid visual observation aircraft flight angle modeler 41 years Dick has flown Wildcat Hellcat Corsair F-Ba FJ-2 jets design-detailer Curtis Kissinger stress analysis engineer sales engineering AMAer Dick Ryan RC pioneer performed test pilot program put pasture new breed aircraft jet Undaunted history perhaps inspired Curtis Kissinger experi mented circular wing concept patented version 1958 After oneman glider wind tunnel tests CL-RC combination model RSPAM 1 improved version patent issued 1975 RSPAM built after Curtis collaborated build RC model taking control lines out CL-RC com bination using newer RC equip ment available originally pro jected aircraft named Charioteer full-scale projected aircraft circular wing design appears unusual fact aircraft surely flies way aircraft should RSPA Ms prove projected aircraft two-place sport design slightly modified circu lar wing RSPAM very stable flight modes full control Short takeoff landing low speed stand ard mode will pilots choice Capa ble very slow flight will have rela tively high speed economical cruise will stall spin 18-ft wing span will have very large wing area respectable glide Its acro batic exception stalls spins AURIGA Ilits counterpart RC model RSPAM 3 Also envisioned four-place version hav ing same characteristics acro batic designed short mid-range economic travel Wing span will 21 ft AURIGA Iits counterpart RC model RSPAM 2 Prior two Charioteer/ RSPAM 1 also intended have 21-ft wing span original venture manned experimental aircraft p05 sible RPV application RSPAM 1 pro vided us visible proof circular wing actual flight sustained venture using RC models flight testing model showed us big air plane would fly intended quickly pointed out some design areas improve ment Easily modified matched phases flight tests exceeded flight characteristics claimed real aircraft Due unforseen circumstances beyond control other RC testing prototype has delayed carry work redesigned Charioteer RSPAM 1 private type aircraft Thus AURIGA I/RSPAM 2 AURIGA II/RSPAM 3 relatively few years ago idea gathering sufficient data new design usually went route Curtiss did sketches models gliders engineering wind tunnel tests Hopefully prototype would fly well Since circular wing departure standard type wing cringed idea building flying although data engineering said would fly aero model publications time shown through various articles modelers using full-house scale models already duplicating de gree some real aircraft flying char acteristics So could same worst could lose model real aircraft As turned out able fly flight envelope design gained experience RSPA Ms first strictly RC model RSPAM 1 April1978 21 4 simulated slow-flight attitude positive control control deflections different weights angle attitudes could observed during flight tests 5 Cruise attitude showing tail feathers Fence/fin structure provides air flow carries aft wing tail loads wing spars 6 Large wing area short span permits lighter loadings per scale sq ft hp per weight low-pressure wind-tunnel feature reduces power required power fails nose high attitude shown lowering nose bit enables controlled descent built Charioteer drawing drafted 1/7th scale Incorporated data design features experi ence up time Weight area volumes reduced scale chosen copy drawing re vised convert RC scale model produced size large enough tests small enough changes required Subsequently RSPAM 2 3 treated like manner problem area scale building wing center section airfoil being thinner depth shorter chord outboard wing section airfoil series used however thick enough permit spar good depth outboard aft portion wing area needed support Two sub spars added forward aft main spar fence side center wing designed air flow re designed provide structural support trailing edge area wing tail assembly explore design RC fully possible weight compartments added nose C G locations variable weight nose permitted CG varied considerably fore aft design called drastically relocated C G positions controllable circular wing design tolerance thought cen ter variable weight permitted changes wing loading suit various design mode requirements well compensate nose-weight changes calculated wing tail thrust cidence angles varied other com binations RSPAM 2 building models sections allowed set ting pins fence outboard-wing junc tion inserted pre-drilled holes different angles outboard wing held place nylon bolt end spar bulkhead built wing spars placed built-in channels type testing desired prototypes would prohibitive cost RSPAM series movies flight photos sound recordings verbal tape reports used Visual observations field glasses aided in-flight progress angle studies observation stripes placed RSPAM specific angles later incorporated covering design important requirements RC test pilot Such person found RC instructor willing test flying sus pect became involved spirit venture Dick Ryan pioneer RC flier has appreciation admiration Bill Marham another team member did outstanding job mechanic maintain ing RC equipment refueling RSPAMs between flights permitted pilot designer review last flight prepare next flight tests scheduled seg ments rather complete running se quence allowing test pilot feel out modelpractice will After warm-up would perform prearranged segment series segments pro grams consisted climbs level flights turns altitude changes Takeoffs landings approaches climb-outs stalls spins careful study transition mushing recovery since design will spin stall various C G wing loading changes RSPAMs space limits few other test features built RSPAMs Some successful some notbut know what will Wing slots flap center wing outboard wing suction stabila tor some items RSPAM plus RC tells story very well indeed Without advances RC has made tested RSPAMs venture would have possible prototype AURIGA II much closer reality believe will reflect RSPAM 3 perhaps well build RC scale model 22 Model Aviation EOH'5 5A5Iif5ALC Continued page 84 RSPAM 1 forerunner RC Charioteer did primary air work proved value using RC design testing Model full circular wing OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st NC Advanced let NC Novice 1st NC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stuns Junior 1st CL Combat Op & Sr let CL Slom Comb Op & Sr 1st CL Carrier II Op Jr Sr let CL Carrier Jr & Sr 1st CL Class D Speed Open 1st CL Class C Speed Jr & Sr let CLCIassB Speed Op & Sr let CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st FF Class B Open let PP Clam C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES QF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 Foe RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3489 63489 733%4119 83%45B129 94566% 77139 10467149 106W 8W149 10BEst159 114677% 7% 7% 8159 11BEW169 11%67169 126179 125W179 1356219 145 6249 1556309 164% 6389 5ll WIDE BLADE 6W EXTRA WIDE SERIES 4008 FOR SPEED NG ADVANCED DESIGN ND 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OP ALL TIMES AC PYLON RACING DIA PITCHPR ICE 5%3Y4129 755%6149 7SN 5%N 6N149 8%6%6%7 7%7%189 96%7 7A7%189 CONTROL LINE SPEEO& RACING DIA PITCH PRICE 4%6A7129 4555%129 6788%149 77A1OA11169 899189 89N 9/N189 8%77%189 912 13219 N NARROW model continued interest model itself fullscale prototype looks like some has worn off already Word has Dick Buck now flying Bob Hiseys ships Toledo Weak Signals field Welcome scale Radio Technique/Myers continued page 79 retain well-known highly-regarded Pro-line fine tuning variety servos offered sys tem has PLS-l great gener al purpose size small light enough satisfactory 1/2A racer yet strong enough control piped-60 pattern model older Pro-line servos compatible new system arent obsolete just because newer system being manufactured Which nice way treat customers Some people want lessless weight smaller dimensions Fig 4 shows Kraft satisfying desire 12 oun ces KPS-18 smaller Cannon Mini Like leather upholstery custom-built car servo feels sounds quality its 30000-rpm motor tiny output wheel jewel work art isnt cheap once again get what pay Ive yet see larger servo pre cise its centering balanced its action Bob Aberle proud owner hes feeling good lets look tie ribbon discussion American manufacturers still offer lot quality plenty variety Before buy ing cheapest thing thats offered give Made America serious thought pay what get what get RC Simulates/Akelewicz continued page 22 RC RSPAMs RSPAM 1/Charioteer rimental Wing span 36 diameter Length 48 Weight 7 10 lbs K&B 40 RSPAM 2/AURIGA Private type 4passenger Wing span modified 42 diameter Length 49 Weight 7 11 lbs K&B 40 Supertigre 46 RSPAM 3/AURIGA II Private type two place Wing span modified 36 diameter Length 411/2 Weight 5 9 lbs K&B 40 Fuselage mainframes thin plywood Balsa No land urethane foam contour No 2 3 Wings urethane foam No 1 2 Styrofoam meat tray ribs capstrips No 3 Covering three colored polymer heat-shrink film RC equipment MRC 5-channel No 3 RS Systems 6-channel No 2 Comments welcome SASE would appreciated would like reply RC Scale/Wischers continued page 24 area 165 ounces per sq ft lightly loaded plane Choosing Contest Model collec tion have four WW planes Sopwith 1 Strutter Bristol M-l monoplane Nieuport 27 Nicuport 17 lightly built Sopwith extremely light detailed plane having wing loading 136 ounces per sq ft planes well Douglas have problem high wind because pepetration poor due over-abundance drag worse handling gusts ground turbulence because low wing loadings airplane has light wing loading its stalling speed same less wind velocity diffi cult handle realistically takeoff landing will lift off short run its landings have no roll-out after touching down result re motely realistic leads conclu sion true realism will-o-the-wisp attainable under ideal conditions sel dom found contests Sailplanes because clean aerodynamically usual ly successful overcoming adverse conditions ballast penetration Under ideal conditions World War planes joy fly cannot sensi bly use Nats hoping lucky flight before easy judges know some flight scores may little half what re quired stake 1977 Nats chance represent US next World Championships needed therefore minimize luck element especially true warned beforehand strong wind could expected Riverside during Twin Stik Trainer 19 30-size engines twin has exceptional single-engine per formance proven docile flying character istiCs long-popular Stik series multichannel kits should make Twin Stik Train er easy handle twin can cluded kit two lightweight aluminum engine mounts nylon blocks preformed landing gear molded nylon steerable nose gear bearing hinges etc Span 54 4-channels $4995 Midwest Products Co 400 5 Indiana St Hobart IN 46342 product review product review product review 84 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula Ii 125 RevUp 8%-6% new Pylon Rac ing propl Droduct review product review product review
Edition: Model Aviation - 1978/04
Page Numbers: 20, 21, 22, 84
U Simulates Propos Since RC dynamically similar models actual aircraft have proved worth flight testing author reasoned proposed circular wing air craft should fly similar RC test model Design changes found necessary model would save money time point way successful full-scale prototype IF RC SCALE models full-sized air craft can flown prototypically could full-size projected aircraft cir cular wing flown like scale RC model design challenge met using RC techniques some own innovations build fly Reduced Scale Prototype Aircraft Model RSPAM short Circular wing aircraft rare breed Though well known circular wing does have bit history Circular flying wings patented 1904 11 25 26 40s Flying Flapjack flown Navy XF5U-1 built HA Richard Akelewicz Above Star Wars nothing ith nut aerodynamicists win nave tiela day multiplicity design features incorporated two RC test jobs Foreground RSPAM 3 rear RSPAM 2 See text relationships full-scale Aurigas Below Author Dick Akelewicz 20 Model Aviation ed Full-Scale Design.. 1 RSPAM 3 showing difference thickness between center snd outboard portions wing airflow fences between 2 Center wing section fences tail structure form open-type wind tunnel 3 model suspended slow-fly-by attitude Stripes aid visual observation aircraft flight angle modeler 41 years Dick has flown Wildcat Hellcat Corsair F-Ba FJ-2 jets design-detailer Curtis Kissinger stress analysis engineer sales engineering AMAer Dick Ryan RC pioneer performed test pilot program put pasture new breed aircraft jet Undaunted history perhaps inspired Curtis Kissinger experi mented circular wing concept patented version 1958 After oneman glider wind tunnel tests CL-RC combination model RSPAM 1 improved version patent issued 1975 RSPAM built after Curtis collaborated build RC model taking control lines out CL-RC com bination using newer RC equip ment available originally pro jected aircraft named Charioteer full-scale projected aircraft circular wing design appears unusual fact aircraft surely flies way aircraft should RSPA Ms prove projected aircraft two-place sport design slightly modified circu lar wing RSPAM very stable flight modes full control Short takeoff landing low speed stand ard mode will pilots choice Capa ble very slow flight will have rela tively high speed economical cruise will stall spin 18-ft wing span will have very large wing area respectable glide Its acro batic exception stalls spins AURIGA Ilits counterpart RC model RSPAM 3 Also envisioned four-place version hav ing same characteristics acro batic designed short mid-range economic travel Wing span will 21 ft AURIGA Iits counterpart RC model RSPAM 2 Prior two Charioteer/ RSPAM 1 also intended have 21-ft wing span original venture manned experimental aircraft p05 sible RPV application RSPAM 1 pro vided us visible proof circular wing actual flight sustained venture using RC models flight testing model showed us big air plane would fly intended quickly pointed out some design areas improve ment Easily modified matched phases flight tests exceeded flight characteristics claimed real aircraft Due unforseen circumstances beyond control other RC testing prototype has delayed carry work redesigned Charioteer RSPAM 1 private type aircraft Thus AURIGA I/RSPAM 2 AURIGA II/RSPAM 3 relatively few years ago idea gathering sufficient data new design usually went route Curtiss did sketches models gliders engineering wind tunnel tests Hopefully prototype would fly well Since circular wing departure standard type wing cringed idea building flying although data engineering said would fly aero model publications time shown through various articles modelers using full-house scale models already duplicating de gree some real aircraft flying char acteristics So could same worst could lose model real aircraft As turned out able fly flight envelope design gained experience RSPA Ms first strictly RC model RSPAM 1 April1978 21 4 simulated slow-flight attitude positive control control deflections different weights angle attitudes could observed during flight tests 5 Cruise attitude showing tail feathers Fence/fin structure provides air flow carries aft wing tail loads wing spars 6 Large wing area short span permits lighter loadings per scale sq ft hp per weight low-pressure wind-tunnel feature reduces power required power fails nose high attitude shown lowering nose bit enables controlled descent built Charioteer drawing drafted 1/7th scale Incorporated data design features experi ence up time Weight area volumes reduced scale chosen copy drawing re vised convert RC scale model produced size large enough tests small enough changes required Subsequently RSPAM 2 3 treated like manner problem area scale building wing center section airfoil being thinner depth shorter chord outboard wing section airfoil series used however thick enough permit spar good depth outboard aft portion wing area needed support Two sub spars added forward aft main spar fence side center wing designed air flow re designed provide structural support trailing edge area wing tail assembly explore design RC fully possible weight compartments added nose C G locations variable weight nose permitted CG varied considerably fore aft design called drastically relocated C G positions controllable circular wing design tolerance thought cen ter variable weight permitted changes wing loading suit various design mode requirements well compensate nose-weight changes calculated wing tail thrust cidence angles varied other com binations RSPAM 2 building models sections allowed set ting pins fence outboard-wing junc tion inserted pre-drilled holes different angles outboard wing held place nylon bolt end spar bulkhead built wing spars placed built-in channels type testing desired prototypes would prohibitive cost RSPAM series movies flight photos sound recordings verbal tape reports used Visual observations field glasses aided in-flight progress angle studies observation stripes placed RSPAM specific angles later incorporated covering design important requirements RC test pilot Such person found RC instructor willing test flying sus pect became involved spirit venture Dick Ryan pioneer RC flier has appreciation admiration Bill Marham another team member did outstanding job mechanic maintain ing RC equipment refueling RSPAMs between flights permitted pilot designer review last flight prepare next flight tests scheduled seg ments rather complete running se quence allowing test pilot feel out modelpractice will After warm-up would perform prearranged segment series segments pro grams consisted climbs level flights turns altitude changes Takeoffs landings approaches climb-outs stalls spins careful study transition mushing recovery since design will spin stall various C G wing loading changes RSPAMs space limits few other test features built RSPAMs Some successful some notbut know what will Wing slots flap center wing outboard wing suction stabila tor some items RSPAM plus RC tells story very well indeed Without advances RC has made tested RSPAMs venture would have possible prototype AURIGA II much closer reality believe will reflect RSPAM 3 perhaps well build RC scale model 22 Model Aviation EOH'5 5A5Iif5ALC Continued page 84 RSPAM 1 forerunner RC Charioteer did primary air work proved value using RC design testing Model full circular wing OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st NC Advanced let NC Novice 1st NC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stuns Junior 1st CL Combat Op & Sr let CL Slom Comb Op & Sr 1st CL Carrier II Op Jr Sr let CL Carrier Jr & Sr 1st CL Class D Speed Open 1st CL Class C Speed Jr & Sr let CLCIassB Speed Op & Sr let CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st FF Class B Open let PP Clam C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES QF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 Foe RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3489 63489 733%4119 83%45B129 94566% 77139 10467149 106W 8W149 10BEst159 114677% 7% 7% 8159 11BEW169 11%67169 126179 125W179 1356219 145 6249 1556309 164% 6389 5ll WIDE BLADE 6W EXTRA WIDE SERIES 4008 FOR SPEED NG ADVANCED DESIGN ND 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OP ALL TIMES AC PYLON RACING DIA PITCHPR ICE 5%3Y4129 755%6149 7SN 5%N 6N149 8%6%6%7 7%7%189 96%7 7A7%189 CONTROL LINE SPEEO& RACING DIA PITCH PRICE 4%6A7129 4555%129 6788%149 77A1OA11169 899189 89N 9/N189 8%77%189 912 13219 N NARROW model continued interest model itself fullscale prototype looks like some has worn off already Word has Dick Buck now flying Bob Hiseys ships Toledo Weak Signals field Welcome scale Radio Technique/Myers continued page 79 retain well-known highly-regarded Pro-line fine tuning variety servos offered sys tem has PLS-l great gener al purpose size small light enough satisfactory 1/2A racer yet strong enough control piped-60 pattern model older Pro-line servos compatible new system arent obsolete just because newer system being manufactured Which nice way treat customers Some people want lessless weight smaller dimensions Fig 4 shows Kraft satisfying desire 12 oun ces KPS-18 smaller Cannon Mini Like leather upholstery custom-built car servo feels sounds quality its 30000-rpm motor tiny output wheel jewel work art isnt cheap once again get what pay Ive yet see larger servo pre cise its centering balanced its action Bob Aberle proud owner hes feeling good lets look tie ribbon discussion American manufacturers still offer lot quality plenty variety Before buy ing cheapest thing thats offered give Made America serious thought pay what get what get RC Simulates/Akelewicz continued page 22 RC RSPAMs RSPAM 1/Charioteer rimental Wing span 36 diameter Length 48 Weight 7 10 lbs K&B 40 RSPAM 2/AURIGA Private type 4passenger Wing span modified 42 diameter Length 49 Weight 7 11 lbs K&B 40 Supertigre 46 RSPAM 3/AURIGA II Private type two place Wing span modified 36 diameter Length 411/2 Weight 5 9 lbs K&B 40 Fuselage mainframes thin plywood Balsa No land urethane foam contour No 2 3 Wings urethane foam No 1 2 Styrofoam meat tray ribs capstrips No 3 Covering three colored polymer heat-shrink film RC equipment MRC 5-channel No 3 RS Systems 6-channel No 2 Comments welcome SASE would appreciated would like reply RC Scale/Wischers continued page 24 area 165 ounces per sq ft lightly loaded plane Choosing Contest Model collec tion have four WW planes Sopwith 1 Strutter Bristol M-l monoplane Nieuport 27 Nicuport 17 lightly built Sopwith extremely light detailed plane having wing loading 136 ounces per sq ft planes well Douglas have problem high wind because pepetration poor due over-abundance drag worse handling gusts ground turbulence because low wing loadings airplane has light wing loading its stalling speed same less wind velocity diffi cult handle realistically takeoff landing will lift off short run its landings have no roll-out after touching down result re motely realistic leads conclu sion true realism will-o-the-wisp attainable under ideal conditions sel dom found contests Sailplanes because clean aerodynamically usual ly successful overcoming adverse conditions ballast penetration Under ideal conditions World War planes joy fly cannot sensi bly use Nats hoping lucky flight before easy judges know some flight scores may little half what re quired stake 1977 Nats chance represent US next World Championships needed therefore minimize luck element especially true warned beforehand strong wind could expected Riverside during Twin Stik Trainer 19 30-size engines twin has exceptional single-engine per formance proven docile flying character istiCs long-popular Stik series multichannel kits should make Twin Stik Train er easy handle twin can cluded kit two lightweight aluminum engine mounts nylon blocks preformed landing gear molded nylon steerable nose gear bearing hinges etc Span 54 4-channels $4995 Midwest Products Co 400 5 Indiana St Hobart IN 46342 product review product review product review 84 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mula Ii 125 RevUp 8%-6% new Pylon Rac ing propl Droduct review product review product review