Man Power update Don Berliner NO MATTER outlandish challenge will always few people turned No matter far-fetched rules mere hint competition will excite impossible simply identifies goal prize goes unclaimed 15 years despite series brilliantly organized attempts upon makes chase exciting So has race develop man-powered airplane Years work create successful ultra-light airplane having less 20 hp both US Great Britain failed result anything halfway useful fly little power means very large wings very low weight thus wing load ings power loadings far outside sensible ranges silly things might fly well inside Astrodome-but taking Right Weybridge Mercury rest its wings unsupported air drooping gracefully has wing span early Lockheed Con stellation weight large St Bernard Photo British Ministry Defense spite years intense effort flights better part mile no one has completed Figure-8 course claim $114000 Kremer prize outside winds blow asking trouble dream flying almost no power remained topic otherwise empty hours uninspiring background ponder upon Englishman else proceeded create need class flying machines would make conventional ultra-light look compari son like heavily-loaded supersonic jet Industrialist Henry Kremer specified human power airplane could fly figure-8 around pylons half mile apart prize first $14000 Years later after raised over $100000 winning seemed quite impossible ever yet men tried men tried still men continue try Through odds have remained same Almost hopeless Kremer Prize seems safe first bicycle trip Moon Now dont get idea no manpowered airplane has ever flown Far least dozen different ones have cruised through calm friendly air close long flat runway pilots huffing puffing dear life Several have made flights 500 yards lasting czzzziiZI7 j7 1 ICARuS MAN POWERED AIRCRAFT 01 234 S6Sl0 SCALE IN PEE 10 Model Aviation WE YBRID GE POWERED AIRCRAFT 567o SCALE IN FEET minute yet goal mile flight around pylons seems far out reach today Kremer first waved money around 1959 Perhaps thats what makes inter esting Despite successes no seems have very clear idea go about developing airplane will fly figure-8 course problem nutshell ludi crous lack horsepower Laboratory field tests agree can expected healthy human about half horsepower Thats about what can get model aero engine 30 cu displacement As flying air plane pilot inside such power thats insane game people much interested playing game winning Just lifting human off ground means manpowered airplane must have take-off weight 100 lbs impossibly light structure vast wings needed lift such machine low speed gross weight must climb least 200 lbs Get 200-lb air plane flying haIfa horsepower Once basic dimensions arrived should have end serious thoughts about flying man-power alone Except course occasional nut thinks isnt bound same laws physics keep rest us stepping off space beginning end Just two years after Henry Kremer offered prize such foolishness first man-powered airplane took skies. can call air couple feet above runway skies Nov 9 1961 veteran modeler Derek Piggott pedalled way along runway Lasham Gliding Centre southwest London parted company native English soil alighted 50 yards away after having climbed way six feet altitude first time history man flown under own power week later second man-powered airplane flewthe Hatfield Groups Puf fin end year machine flown far 700 yards straight line made turns 800 Early 1962 Puffin pilot John Wim penny stayed aloft almost 1000 yards Progress rapid people could hardly blamed assuming milelong figure-8 flight Kremer Prize just matter time twas flight Wim penny remained unofficial world record 10 years no has yet ap proached turns achieved first months wasnt people werent trying nor werent learning others experiences Man-powered air planes flew during 1960s South Africa Japan Austria well Great Britain 1967 Henry Kremer apparently decided initial prize $14000 wasnt enough get job done doubled early 1970s saw still activity huge 120 wingspan Weybridge Dumbo flew 1971 followed few months later Jupiter considerably smaller 80 early 1972 Peter Wright flew 71 almost flying wing 120 yards first try month later Liver puffin flew built remains wrecked Puffin Liverpool University Prof Keith Sherwin students sport/trainer contender Kremer honors Action continued hot heavy rather cool very light June 1972 RAE FIt Lt John Potter set un official distance record 1171 yards 2/3 mile Jupiter end year first two-seatersthe Toucan built Hertfordshire Pedal Aeronautsflew July 1973 gone 700 yards turn page April1976 11 MAN 4 CFI4ieR John Thornhill typical free-flight modeler designed job heck Problem turns created super-long wing 4 I. 0 oo w z w Co 00 z 4 o LA n 0 0 0 0 ZWI 0 0 o5w0 04 4\ C d RIUIRED AIRFOIL KU 3010F CABANE IF PLASTIC TWO CHANNEL RADIO CONTROL UNIT LENGTH 306 OPERATES RUDDER AND ELEVATOR THRU U SERVO TABS E EVATION26 WHEEL 12 Model Aviation Li MAN POWERED AIRCRAFT BY NICK GOOD HART 0123 45 6 76 110 SCALE IN FEET Man Poweran Update As further encouragement Kremer 1973 upped still-unclaimed prize 50000 pounds worth about $105000 written still no has actually made attempt fly figure-8 course because making kind turn far harder flying straight thats tough enough reasons disturbingly basic order get man-powered air plane off ground must develop lift possible getting too heavy means very long wings reduce span-loading long wings air plane travelling less 20 mph turn ing will lose some its precious lift unless turn very very gradual course would mean flying far ther tighter turn will mean board wingtip will stand good chance stalling least dropping altitude few feet slight drop will bring tip ground Thats what can happen under ideal conditions about day wind blowing r kind day about 5 mph wind causes very serious problems before airplane ready launched Just imagine moving out hangar across field its wings least 100 feet wing loading empty little /4 lb/sq ft Thats about half wingloading good competition free-flight model. l doesnt have contend wings stretching 50 feet either side its fuselage Once man-powered craft posi tion fun begins pilot/athlete care fully positions himself skimpiest seats straps feet onto bicycle pedals handlers wingtips begins pedalling hes worth strange propeller7-l0 diameter made laminated balsa weighing around three poundsslowly begins turn airplane moves forward Its wings level themselves As reaches blazing speed 15 mph slowly lifts up height five feet Still very much ground-effect pilot straining muscle maintain power control great bird same time quietly sails along runway descends slides stop Assuming hasnt damaged spare pilot weather hasnt turned sour could another attempt isnt much time though because conditions permitting kind flying exist best short time after sunrise again just before sunset has calmcalmcalm obstacles handicaps drawbacks pile up Weather size power control weight Yet difficulties become obvious number seri ous well-organized groups talented people determined beat odds creases look some currently active projects couple really futuristic ideas should give some idea just what approaches seem hold best chances success Project Jupiter current record-holder man aged flown FIt Lt John Potter RAF Jupiter begun 1960 seriously damaged fire 1969 just before have completed finally flown Feb 9 1972 Its best date un official flight 1350 yards about two minutes Dimensions wingspan 80 length 29 6 wing area 300 sq ft empty weight 146 lbs flying weight 300 lbs Maximum speed 30 mph cruising speed 20 mph stalling speed 18 mph ceiling date 25-30 Airfoil NACA 653618 Weybridge Mercury Probably largest single-seat airplane ever flown built 1968-70 Dumbo help Royal Aero nautical Society British Aircraft Corp first flight glider pilot Chris Lovell controls Sept 18 1971 covered 50 yards returned shop modifications later transferred group owns Jupiter Dimensions Wingspan 120 4 length 21 0 wing area 485 sq ft empty weight 175 lbs Airfoils Wortman FX68-M-180 root FX68-M-160 mid-span FX68-M-140 tip Construction wings have aluminum alloy tube girder main spar balsa ribs leading trailing edges Fuselage has basic framework aluminum alloy tub ing balsa frames stringers tail has plywood spruce box-spar structure balsa ribs leading trailing edges entire airplane cov ered clear Melinex plastic Maximum speed estimated 16 mph stalling speed 11mph Toucan first successful two-man machine built 1967-72 Hertford shire Pedal Aeronauts group Handley Page engineers Its first flight Dec 23 1972 longest crewed Bryan Bowen Derek May 700 yards April 1976 13 72 \l/kI II liz Ed CF4ie~ JUPITER MAN POWERtO AIRCRAFT SCMA IN Fir Lc fr*f-~ Man PowerAn Update 15-20 altitude July 3 1973 idea behind two-man concept allow man concentrate 100% pedalling pilot can afford distracted pedalling need control airplane Dimensions Wingspan 123 0 being increased 138 length 28 8 wing area 600 sq ft empty weight 210 lbs Airfoil NACA 633618 Construction Wings have spars built spruce booms plywood webs balsa ribs forward part wings covered expanded polystyrene foam fuselage built up spruce balsa tail balsa Everything covered clear Melinex Wright MPA Mk 1 man-powered airplanes have built teams specialists pretty much work man Peter Wright started construction June 1971 lifted off following Feb ruary after amazingly short period work first flight covered 120 yards followed immediately others due technical problems Wright now finishing up improved machine due fly late 1975 early 1976 Dimensions Wingspan 710 length 20 0 wing area 486 sq ft empty weight 95 lbs Airfoil Wortman FX-08-S-l76 Its design speed range may oddest history aviation top speed 15 mph cruising speed 14 mph stalling speed 13 mph Construction The entire craft com bination carbon fibre balsa plastic foam covered Melinex now couple very advanced ideas have yet leave drawing board quite possibly never will Icarus brain-child TRW Systems engineer Dana L Hall group advanced students Its main features continued page 84 14 Model Aviation * THIN RIGID BLADES OF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIA FITCH 5%3 63 73/n3/n4 B3%456 94677 10466W 78W 106EW0 VA 7 8 116EW 11%67 126 125W 1356 1456 155 164 0W WIDE BLADE EW EXTRA WIDE ALL NEWI SERIES 400 B FOR SPEED & RACING NEW ADVANCED DESIGN TERRIFIC INCREASE IN THRUST & SPEED LEADING SPEED RECORD HOLDER 72 73 74 DIA PITCH 467 45 5 678EV 7566N7/ 10 11 8R99N 87747/ 977A7M 1213 N NARROW U QUE PLANS FOR GAS MODELERS E INCLUDB PATTERNS 42 BoOing P266 $14 ooO. F. 45 Rocing F4$3 P12 59 36 Eokkc Tape DRI $7 47 Coc Bocnk P6-E $15 38 Col 8 Spod XIII $10 47 GoIocnI Fl IC-2 $15 39 Col B Nioopol 11 $9 47 CcIC HnIIdicec $11 - Pp $8 48 Gb Glodiolon $10 0l Boo K $9 49 S 0oy4e 9Th$10 FB12B&C $11 50 PoIjI Plc P6$10 III Snonl 59 82 Slinon SW 087 $10 Pc 7F1 $11 57 Car 0lE Falcon 515 Macan MBl$14 57 CocSO3C1 Sno $14 57 Kononnc TninTo189 SE Boeing 89 BncIer$9 61 AEGGIVBOnIbO$17 6$ 009 038 CBS $12 66 Coo 02 Boo lit $10 62 0 Skyrocknl F5Pl $14 107 940dm 9481 $20 87 Lnd Lock Sic, $12 54 Sapec Spillico$13 MANS MANY MORE Radio Technique/Myers continued page 9 C M Duffield Thomaston Tex pointed out UJT temperature sensitive true Fig 7 shows effect temperature three devices study carefully will obtain enough information guide decisions about using devices first thing will notice addition Flight Lite made Advanced Devices Inc PO Box 152 Rockville Md 20850 first read Flyer newsletter PGRCC purchased Deluxe 48 Volt model $995 can buy standard model no plugs $695 unit weighs 2 grams fits drilled meas ures iameter X long An LED sticks out end pigtails connecting system stick out other switches bright steady glow extinction switching voltage Power-CYT virtually unaffected temperature effect Flight Lite small flashing range Corleys CVI quite broad low tem peratures very narrow high tern6 5 44 4 U F-J 0 3 320 2I 12 0 750 2 12 0 1350 12 0 FLIGHT LITE peratures Note numbers chart current drawn milliam peres proportional brightness brightness CVI changes 41 across flashing range low level range starts 4 volts irrespective tem perature Some people have expressed concern amount current drawn devices integrate current drawn over discharge time bat tery pack service will see power consumed order 5% available power Most people will stop fly ing 30% 50% battery power still pack just because dont know what have basis de vices extend flying time Thanks Bob Petrinec Power-CYT ex plan ation responses column far would seem want little elec tronic gadgets build simplified ex planations traditional RC techniques like bolt sizes propeller sizes hinging installations etc want something else address George M Myers 70 Froehlich Farm Road Hicksville NY 11801 320750 j350 4045 HDD 00 POWER- CYT FLASHING RANGE NUMBERS IN BOXES ARE MILLIAMPS AND SHOW RELATIVE BRIGHTNESS Man Power/Berliner continued page 14 tandem-wing arrangement re duces critical over-all wingspan slave/pilot combination steadily gaining popularity strangely curled-up wingtips designed control tip vortices may worth trouble build Dimensions Wingspan front wing 65 rear wing 80 length 19 wing area front wing 250 sq ft rear wing 300 sq ft 320 41 30 7 750 42 6 350 43 20 5 O00 CORLEY CVI empty weight 167 lbs flying weight 467 lbs Airfoil both wings Wortman FX-67K-170 Estimated cruising speed 22 mph Goodhart unusual design handiwork Rear Adm Nick Goodhart Royal Navy great men British sailplane move ment idea reduce induced drag much possible developing airplane can flown within 11/2 feet 84 Model Aviation HIGH PERFORMANCE * COMPETITION PROVEN ASK yOUR DEALER TEMPERATURE RESPONSES OF SAMPLE VOLTAGE -INDICATING PILOT LIGHTS QUICKEST MAIL SERVICE ground thus cutting induced drag much 90% make such flight possible Goodhart placed pilot pod either wingtip small canard sur face far out front guide should virtually eliminate tip losses Turns would made banking much guided missile does Dimensions Wingspan 100 length 31 wing area 794 sq ft empty weight under 300 lbs flying weight under 600 lbs Airfoil Wortman FX-63-137 Cruising speed estimated 16-17 mph other projects being actively worked such two-man biplane Massachusetts Institute Technology Its wings folded up wtis ready lift off its first flight however now being re-built Others far along something could pop out wood work moment builders man-powered airplanes often secretive side until theyre ready per form until something quite unexpected happens mighty aeronautical chal lenge will remain untouched Kremer Prize has claimed will stand tribute imagination man As beacon lighting way ward next outlandish goal could flapping-wing flight human flight kind wings Or. age radio compartment 1 wide 5 6 long 2 deep has some challenge hobby right things would like com ment about racing general drifting away scale aspect aircraft original intent NMPRA event emulate full scale racing So far Formula-One has main tained degree FAI 600 sq class has died USA because strange looking non-scale aircraft evolved over years Quarter Midget class has become very popular also partly due fact aircraft must look like full-scale aircraft has raced believe racing would adopt same rule planes should look like full scale aircraft necessarily racing plane least 85% 90% scale outline least watching group planes racing look like real aircraft lot teresting watching bunch square boxes wings spectators enjoy races can identify type aircraft participating races So much soap box month Next month will cover Quickie 500 class racing next step world RC racing Please send questions ideas gripes etc D K Lane 4477 W 136th St Hawthorne Calif 90250 will happy include material re ceived column Keep em flying go fast turn left Littlest Stick Spanning 19-1/2 in. 010 02 power tiny smooth fly ing responsive version Stick Con cept great fun plane may flown schoolyard large back yard Although fast agile skittery little planes means safe control Ace pulse system rudder-only utilizes Baby System Baby actuator Weight 575 oz Price $395 Ace R/C Inc Box 511 Higginsville Mo 64037 April 1976 85 RC Pylon/Lane continued page 19
Edition: Model Aviation - 1976/04
Page Numbers: 10, 11, 12, 13, 14, 84, 85
Man Power update Don Berliner NO MATTER outlandish challenge will always few people turned No matter far-fetched rules mere hint competition will excite impossible simply identifies goal prize goes unclaimed 15 years despite series brilliantly organized attempts upon makes chase exciting So has race develop man-powered airplane Years work create successful ultra-light airplane having less 20 hp both US Great Britain failed result anything halfway useful fly little power means very large wings very low weight thus wing load ings power loadings far outside sensible ranges silly things might fly well inside Astrodome-but taking Right Weybridge Mercury rest its wings unsupported air drooping gracefully has wing span early Lockheed Con stellation weight large St Bernard Photo British Ministry Defense spite years intense effort flights better part mile no one has completed Figure-8 course claim $114000 Kremer prize outside winds blow asking trouble dream flying almost no power remained topic otherwise empty hours uninspiring background ponder upon Englishman else proceeded create need class flying machines would make conventional ultra-light look compari son like heavily-loaded supersonic jet Industrialist Henry Kremer specified human power airplane could fly figure-8 around pylons half mile apart prize first $14000 Years later after raised over $100000 winning seemed quite impossible ever yet men tried men tried still men continue try Through odds have remained same Almost hopeless Kremer Prize seems safe first bicycle trip Moon Now dont get idea no manpowered airplane has ever flown Far least dozen different ones have cruised through calm friendly air close long flat runway pilots huffing puffing dear life Several have made flights 500 yards lasting czzzziiZI7 j7 1 ICARuS MAN POWERED AIRCRAFT 01 234 S6Sl0 SCALE IN PEE 10 Model Aviation WE YBRID GE POWERED AIRCRAFT 567o SCALE IN FEET minute yet goal mile flight around pylons seems far out reach today Kremer first waved money around 1959 Perhaps thats what makes inter esting Despite successes no seems have very clear idea go about developing airplane will fly figure-8 course problem nutshell ludi crous lack horsepower Laboratory field tests agree can expected healthy human about half horsepower Thats about what can get model aero engine 30 cu displacement As flying air plane pilot inside such power thats insane game people much interested playing game winning Just lifting human off ground means manpowered airplane must have take-off weight 100 lbs impossibly light structure vast wings needed lift such machine low speed gross weight must climb least 200 lbs Get 200-lb air plane flying haIfa horsepower Once basic dimensions arrived should have end serious thoughts about flying man-power alone Except course occasional nut thinks isnt bound same laws physics keep rest us stepping off space beginning end Just two years after Henry Kremer offered prize such foolishness first man-powered airplane took skies. can call air couple feet above runway skies Nov 9 1961 veteran modeler Derek Piggott pedalled way along runway Lasham Gliding Centre southwest London parted company native English soil alighted 50 yards away after having climbed way six feet altitude first time history man flown under own power week later second man-powered airplane flewthe Hatfield Groups Puf fin end year machine flown far 700 yards straight line made turns 800 Early 1962 Puffin pilot John Wim penny stayed aloft almost 1000 yards Progress rapid people could hardly blamed assuming milelong figure-8 flight Kremer Prize just matter time twas flight Wim penny remained unofficial world record 10 years no has yet ap proached turns achieved first months wasnt people werent trying nor werent learning others experiences Man-powered air planes flew during 1960s South Africa Japan Austria well Great Britain 1967 Henry Kremer apparently decided initial prize $14000 wasnt enough get job done doubled early 1970s saw still activity huge 120 wingspan Weybridge Dumbo flew 1971 followed few months later Jupiter considerably smaller 80 early 1972 Peter Wright flew 71 almost flying wing 120 yards first try month later Liver puffin flew built remains wrecked Puffin Liverpool University Prof Keith Sherwin students sport/trainer contender Kremer honors Action continued hot heavy rather cool very light June 1972 RAE FIt Lt John Potter set un official distance record 1171 yards 2/3 mile Jupiter end year first two-seatersthe Toucan built Hertfordshire Pedal Aeronautsflew July 1973 gone 700 yards turn page April1976 11 MAN 4 CFI4ieR John Thornhill typical free-flight modeler designed job heck Problem turns created super-long wing 4 I. 0 oo w z w Co 00 z 4 o LA n 0 0 0 0 ZWI 0 0 o5w0 04 4\ C d RIUIRED AIRFOIL KU 3010F CABANE IF PLASTIC TWO CHANNEL RADIO CONTROL UNIT LENGTH 306 OPERATES RUDDER AND ELEVATOR THRU U SERVO TABS E EVATION26 WHEEL 12 Model Aviation Li MAN POWERED AIRCRAFT BY NICK GOOD HART 0123 45 6 76 110 SCALE IN FEET Man Poweran Update As further encouragement Kremer 1973 upped still-unclaimed prize 50000 pounds worth about $105000 written still no has actually made attempt fly figure-8 course because making kind turn far harder flying straight thats tough enough reasons disturbingly basic order get man-powered air plane off ground must develop lift possible getting too heavy means very long wings reduce span-loading long wings air plane travelling less 20 mph turn ing will lose some its precious lift unless turn very very gradual course would mean flying far ther tighter turn will mean board wingtip will stand good chance stalling least dropping altitude few feet slight drop will bring tip ground Thats what can happen under ideal conditions about day wind blowing r kind day about 5 mph wind causes very serious problems before airplane ready launched Just imagine moving out hangar across field its wings least 100 feet wing loading empty little /4 lb/sq ft Thats about half wingloading good competition free-flight model. l doesnt have contend wings stretching 50 feet either side its fuselage Once man-powered craft posi tion fun begins pilot/athlete care fully positions himself skimpiest seats straps feet onto bicycle pedals handlers wingtips begins pedalling hes worth strange propeller7-l0 diameter made laminated balsa weighing around three poundsslowly begins turn airplane moves forward Its wings level themselves As reaches blazing speed 15 mph slowly lifts up height five feet Still very much ground-effect pilot straining muscle maintain power control great bird same time quietly sails along runway descends slides stop Assuming hasnt damaged spare pilot weather hasnt turned sour could another attempt isnt much time though because conditions permitting kind flying exist best short time after sunrise again just before sunset has calmcalmcalm obstacles handicaps drawbacks pile up Weather size power control weight Yet difficulties become obvious number seri ous well-organized groups talented people determined beat odds creases look some currently active projects couple really futuristic ideas should give some idea just what approaches seem hold best chances success Project Jupiter current record-holder man aged flown FIt Lt John Potter RAF Jupiter begun 1960 seriously damaged fire 1969 just before have completed finally flown Feb 9 1972 Its best date un official flight 1350 yards about two minutes Dimensions wingspan 80 length 29 6 wing area 300 sq ft empty weight 146 lbs flying weight 300 lbs Maximum speed 30 mph cruising speed 20 mph stalling speed 18 mph ceiling date 25-30 Airfoil NACA 653618 Weybridge Mercury Probably largest single-seat airplane ever flown built 1968-70 Dumbo help Royal Aero nautical Society British Aircraft Corp first flight glider pilot Chris Lovell controls Sept 18 1971 covered 50 yards returned shop modifications later transferred group owns Jupiter Dimensions Wingspan 120 4 length 21 0 wing area 485 sq ft empty weight 175 lbs Airfoils Wortman FX68-M-180 root FX68-M-160 mid-span FX68-M-140 tip Construction wings have aluminum alloy tube girder main spar balsa ribs leading trailing edges Fuselage has basic framework aluminum alloy tub ing balsa frames stringers tail has plywood spruce box-spar structure balsa ribs leading trailing edges entire airplane cov ered clear Melinex plastic Maximum speed estimated 16 mph stalling speed 11mph Toucan first successful two-man machine built 1967-72 Hertford shire Pedal Aeronauts group Handley Page engineers Its first flight Dec 23 1972 longest crewed Bryan Bowen Derek May 700 yards April 1976 13 72 \l/kI II liz Ed CF4ie~ JUPITER MAN POWERtO AIRCRAFT SCMA IN Fir Lc fr*f-~ Man PowerAn Update 15-20 altitude July 3 1973 idea behind two-man concept allow man concentrate 100% pedalling pilot can afford distracted pedalling need control airplane Dimensions Wingspan 123 0 being increased 138 length 28 8 wing area 600 sq ft empty weight 210 lbs Airfoil NACA 633618 Construction Wings have spars built spruce booms plywood webs balsa ribs forward part wings covered expanded polystyrene foam fuselage built up spruce balsa tail balsa Everything covered clear Melinex Wright MPA Mk 1 man-powered airplanes have built teams specialists pretty much work man Peter Wright started construction June 1971 lifted off following Feb ruary after amazingly short period work first flight covered 120 yards followed immediately others due technical problems Wright now finishing up improved machine due fly late 1975 early 1976 Dimensions Wingspan 710 length 20 0 wing area 486 sq ft empty weight 95 lbs Airfoil Wortman FX-08-S-l76 Its design speed range may oddest history aviation top speed 15 mph cruising speed 14 mph stalling speed 13 mph Construction The entire craft com bination carbon fibre balsa plastic foam covered Melinex now couple very advanced ideas have yet leave drawing board quite possibly never will Icarus brain-child TRW Systems engineer Dana L Hall group advanced students Its main features continued page 84 14 Model Aviation * THIN RIGID BLADES OF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIA FITCH 5%3 63 73/n3/n4 B3%456 94677 10466W 78W 106EW0 VA 7 8 116EW 11%67 126 125W 1356 1456 155 164 0W WIDE BLADE EW EXTRA WIDE ALL NEWI SERIES 400 B FOR SPEED & RACING NEW ADVANCED DESIGN TERRIFIC INCREASE IN THRUST & SPEED LEADING SPEED RECORD HOLDER 72 73 74 DIA PITCH 467 45 5 678EV 7566N7/ 10 11 8R99N 87747/ 977A7M 1213 N NARROW U QUE PLANS FOR GAS MODELERS E INCLUDB PATTERNS 42 BoOing P266 $14 ooO. F. 45 Rocing F4$3 P12 59 36 Eokkc Tape DRI $7 47 Coc Bocnk P6-E $15 38 Col 8 Spod XIII $10 47 GoIocnI Fl IC-2 $15 39 Col B Nioopol 11 $9 47 CcIC HnIIdicec $11 - Pp $8 48 Gb Glodiolon $10 0l Boo K $9 49 S 0oy4e 9Th$10 FB12B&C $11 50 PoIjI Plc P6$10 III Snonl 59 82 Slinon SW 087 $10 Pc 7F1 $11 57 Car 0lE Falcon 515 Macan MBl$14 57 CocSO3C1 Sno $14 57 Kononnc TninTo189 SE Boeing 89 BncIer$9 61 AEGGIVBOnIbO$17 6$ 009 038 CBS $12 66 Coo 02 Boo lit $10 62 0 Skyrocknl F5Pl $14 107 940dm 9481 $20 87 Lnd Lock Sic, $12 54 Sapec Spillico$13 MANS MANY MORE Radio Technique/Myers continued page 9 C M Duffield Thomaston Tex pointed out UJT temperature sensitive true Fig 7 shows effect temperature three devices study carefully will obtain enough information guide decisions about using devices first thing will notice addition Flight Lite made Advanced Devices Inc PO Box 152 Rockville Md 20850 first read Flyer newsletter PGRCC purchased Deluxe 48 Volt model $995 can buy standard model no plugs $695 unit weighs 2 grams fits drilled meas ures iameter X long An LED sticks out end pigtails connecting system stick out other switches bright steady glow extinction switching voltage Power-CYT virtually unaffected temperature effect Flight Lite small flashing range Corleys CVI quite broad low tem peratures very narrow high tern6 5 44 4 U F-J 0 3 320 2I 12 0 750 2 12 0 1350 12 0 FLIGHT LITE peratures Note numbers chart current drawn milliam peres proportional brightness brightness CVI changes 41 across flashing range low level range starts 4 volts irrespective tem perature Some people have expressed concern amount current drawn devices integrate current drawn over discharge time bat tery pack service will see power consumed order 5% available power Most people will stop fly ing 30% 50% battery power still pack just because dont know what have basis de vices extend flying time Thanks Bob Petrinec Power-CYT ex plan ation responses column far would seem want little elec tronic gadgets build simplified ex planations traditional RC techniques like bolt sizes propeller sizes hinging installations etc want something else address George M Myers 70 Froehlich Farm Road Hicksville NY 11801 320750 j350 4045 HDD 00 POWER- CYT FLASHING RANGE NUMBERS IN BOXES ARE MILLIAMPS AND SHOW RELATIVE BRIGHTNESS Man Power/Berliner continued page 14 tandem-wing arrangement re duces critical over-all wingspan slave/pilot combination steadily gaining popularity strangely curled-up wingtips designed control tip vortices may worth trouble build Dimensions Wingspan front wing 65 rear wing 80 length 19 wing area front wing 250 sq ft rear wing 300 sq ft 320 41 30 7 750 42 6 350 43 20 5 O00 CORLEY CVI empty weight 167 lbs flying weight 467 lbs Airfoil both wings Wortman FX-67K-170 Estimated cruising speed 22 mph Goodhart unusual design handiwork Rear Adm Nick Goodhart Royal Navy great men British sailplane move ment idea reduce induced drag much possible developing airplane can flown within 11/2 feet 84 Model Aviation HIGH PERFORMANCE * COMPETITION PROVEN ASK yOUR DEALER TEMPERATURE RESPONSES OF SAMPLE VOLTAGE -INDICATING PILOT LIGHTS QUICKEST MAIL SERVICE ground thus cutting induced drag much 90% make such flight possible Goodhart placed pilot pod either wingtip small canard sur face far out front guide should virtually eliminate tip losses Turns would made banking much guided missile does Dimensions Wingspan 100 length 31 wing area 794 sq ft empty weight under 300 lbs flying weight under 600 lbs Airfoil Wortman FX-63-137 Cruising speed estimated 16-17 mph other projects being actively worked such two-man biplane Massachusetts Institute Technology Its wings folded up wtis ready lift off its first flight however now being re-built Others far along something could pop out wood work moment builders man-powered airplanes often secretive side until theyre ready per form until something quite unexpected happens mighty aeronautical chal lenge will remain untouched Kremer Prize has claimed will stand tribute imagination man As beacon lighting way ward next outlandish goal could flapping-wing flight human flight kind wings Or. age radio compartment 1 wide 5 6 long 2 deep has some challenge hobby right things would like com ment about racing general drifting away scale aspect aircraft original intent NMPRA event emulate full scale racing So far Formula-One has main tained degree FAI 600 sq class has died USA because strange looking non-scale aircraft evolved over years Quarter Midget class has become very popular also partly due fact aircraft must look like full-scale aircraft has raced believe racing would adopt same rule planes should look like full scale aircraft necessarily racing plane least 85% 90% scale outline least watching group planes racing look like real aircraft lot teresting watching bunch square boxes wings spectators enjoy races can identify type aircraft participating races So much soap box month Next month will cover Quickie 500 class racing next step world RC racing Please send questions ideas gripes etc D K Lane 4477 W 136th St Hawthorne Calif 90250 will happy include material re ceived column Keep em flying go fast turn left Littlest Stick Spanning 19-1/2 in. 010 02 power tiny smooth fly ing responsive version Stick Con cept great fun plane may flown schoolyard large back yard Although fast agile skittery little planes means safe control Ace pulse system rudder-only utilizes Baby System Baby actuator Weight 575 oz Price $395 Ace R/C Inc Box 511 Higginsville Mo 64037 April 1976 85 RC Pylon/Lane continued page 19
Edition: Model Aviation - 1976/04
Page Numbers: 10, 11, 12, 13, 14, 84, 85
Man Power update Don Berliner NO MATTER outlandish challenge will always few people turned No matter far-fetched rules mere hint competition will excite impossible simply identifies goal prize goes unclaimed 15 years despite series brilliantly organized attempts upon makes chase exciting So has race develop man-powered airplane Years work create successful ultra-light airplane having less 20 hp both US Great Britain failed result anything halfway useful fly little power means very large wings very low weight thus wing load ings power loadings far outside sensible ranges silly things might fly well inside Astrodome-but taking Right Weybridge Mercury rest its wings unsupported air drooping gracefully has wing span early Lockheed Con stellation weight large St Bernard Photo British Ministry Defense spite years intense effort flights better part mile no one has completed Figure-8 course claim $114000 Kremer prize outside winds blow asking trouble dream flying almost no power remained topic otherwise empty hours uninspiring background ponder upon Englishman else proceeded create need class flying machines would make conventional ultra-light look compari son like heavily-loaded supersonic jet Industrialist Henry Kremer specified human power airplane could fly figure-8 around pylons half mile apart prize first $14000 Years later after raised over $100000 winning seemed quite impossible ever yet men tried men tried still men continue try Through odds have remained same Almost hopeless Kremer Prize seems safe first bicycle trip Moon Now dont get idea no manpowered airplane has ever flown Far least dozen different ones have cruised through calm friendly air close long flat runway pilots huffing puffing dear life Several have made flights 500 yards lasting czzzziiZI7 j7 1 ICARuS MAN POWERED AIRCRAFT 01 234 S6Sl0 SCALE IN PEE 10 Model Aviation WE YBRID GE POWERED AIRCRAFT 567o SCALE IN FEET minute yet goal mile flight around pylons seems far out reach today Kremer first waved money around 1959 Perhaps thats what makes inter esting Despite successes no seems have very clear idea go about developing airplane will fly figure-8 course problem nutshell ludi crous lack horsepower Laboratory field tests agree can expected healthy human about half horsepower Thats about what can get model aero engine 30 cu displacement As flying air plane pilot inside such power thats insane game people much interested playing game winning Just lifting human off ground means manpowered airplane must have take-off weight 100 lbs impossibly light structure vast wings needed lift such machine low speed gross weight must climb least 200 lbs Get 200-lb air plane flying haIfa horsepower Once basic dimensions arrived should have end serious thoughts about flying man-power alone Except course occasional nut thinks isnt bound same laws physics keep rest us stepping off space beginning end Just two years after Henry Kremer offered prize such foolishness first man-powered airplane took skies. can call air couple feet above runway skies Nov 9 1961 veteran modeler Derek Piggott pedalled way along runway Lasham Gliding Centre southwest London parted company native English soil alighted 50 yards away after having climbed way six feet altitude first time history man flown under own power week later second man-powered airplane flewthe Hatfield Groups Puf fin end year machine flown far 700 yards straight line made turns 800 Early 1962 Puffin pilot John Wim penny stayed aloft almost 1000 yards Progress rapid people could hardly blamed assuming milelong figure-8 flight Kremer Prize just matter time twas flight Wim penny remained unofficial world record 10 years no has yet ap proached turns achieved first months wasnt people werent trying nor werent learning others experiences Man-powered air planes flew during 1960s South Africa Japan Austria well Great Britain 1967 Henry Kremer apparently decided initial prize $14000 wasnt enough get job done doubled early 1970s saw still activity huge 120 wingspan Weybridge Dumbo flew 1971 followed few months later Jupiter considerably smaller 80 early 1972 Peter Wright flew 71 almost flying wing 120 yards first try month later Liver puffin flew built remains wrecked Puffin Liverpool University Prof Keith Sherwin students sport/trainer contender Kremer honors Action continued hot heavy rather cool very light June 1972 RAE FIt Lt John Potter set un official distance record 1171 yards 2/3 mile Jupiter end year first two-seatersthe Toucan built Hertfordshire Pedal Aeronautsflew July 1973 gone 700 yards turn page April1976 11 MAN 4 CFI4ieR John Thornhill typical free-flight modeler designed job heck Problem turns created super-long wing 4 I. 0 oo w z w Co 00 z 4 o LA n 0 0 0 0 ZWI 0 0 o5w0 04 4\ C d RIUIRED AIRFOIL KU 3010F CABANE IF PLASTIC TWO CHANNEL RADIO CONTROL UNIT LENGTH 306 OPERATES RUDDER AND ELEVATOR THRU U SERVO TABS E EVATION26 WHEEL 12 Model Aviation Li MAN POWERED AIRCRAFT BY NICK GOOD HART 0123 45 6 76 110 SCALE IN FEET Man Poweran Update As further encouragement Kremer 1973 upped still-unclaimed prize 50000 pounds worth about $105000 written still no has actually made attempt fly figure-8 course because making kind turn far harder flying straight thats tough enough reasons disturbingly basic order get man-powered air plane off ground must develop lift possible getting too heavy means very long wings reduce span-loading long wings air plane travelling less 20 mph turn ing will lose some its precious lift unless turn very very gradual course would mean flying far ther tighter turn will mean board wingtip will stand good chance stalling least dropping altitude few feet slight drop will bring tip ground Thats what can happen under ideal conditions about day wind blowing r kind day about 5 mph wind causes very serious problems before airplane ready launched Just imagine moving out hangar across field its wings least 100 feet wing loading empty little /4 lb/sq ft Thats about half wingloading good competition free-flight model. l doesnt have contend wings stretching 50 feet either side its fuselage Once man-powered craft posi tion fun begins pilot/athlete care fully positions himself skimpiest seats straps feet onto bicycle pedals handlers wingtips begins pedalling hes worth strange propeller7-l0 diameter made laminated balsa weighing around three poundsslowly begins turn airplane moves forward Its wings level themselves As reaches blazing speed 15 mph slowly lifts up height five feet Still very much ground-effect pilot straining muscle maintain power control great bird same time quietly sails along runway descends slides stop Assuming hasnt damaged spare pilot weather hasnt turned sour could another attempt isnt much time though because conditions permitting kind flying exist best short time after sunrise again just before sunset has calmcalmcalm obstacles handicaps drawbacks pile up Weather size power control weight Yet difficulties become obvious number seri ous well-organized groups talented people determined beat odds creases look some currently active projects couple really futuristic ideas should give some idea just what approaches seem hold best chances success Project Jupiter current record-holder man aged flown FIt Lt John Potter RAF Jupiter begun 1960 seriously damaged fire 1969 just before have completed finally flown Feb 9 1972 Its best date un official flight 1350 yards about two minutes Dimensions wingspan 80 length 29 6 wing area 300 sq ft empty weight 146 lbs flying weight 300 lbs Maximum speed 30 mph cruising speed 20 mph stalling speed 18 mph ceiling date 25-30 Airfoil NACA 653618 Weybridge Mercury Probably largest single-seat airplane ever flown built 1968-70 Dumbo help Royal Aero nautical Society British Aircraft Corp first flight glider pilot Chris Lovell controls Sept 18 1971 covered 50 yards returned shop modifications later transferred group owns Jupiter Dimensions Wingspan 120 4 length 21 0 wing area 485 sq ft empty weight 175 lbs Airfoils Wortman FX68-M-180 root FX68-M-160 mid-span FX68-M-140 tip Construction wings have aluminum alloy tube girder main spar balsa ribs leading trailing edges Fuselage has basic framework aluminum alloy tub ing balsa frames stringers tail has plywood spruce box-spar structure balsa ribs leading trailing edges entire airplane cov ered clear Melinex plastic Maximum speed estimated 16 mph stalling speed 11mph Toucan first successful two-man machine built 1967-72 Hertford shire Pedal Aeronauts group Handley Page engineers Its first flight Dec 23 1972 longest crewed Bryan Bowen Derek May 700 yards April 1976 13 72 \l/kI II liz Ed CF4ie~ JUPITER MAN POWERtO AIRCRAFT SCMA IN Fir Lc fr*f-~ Man PowerAn Update 15-20 altitude July 3 1973 idea behind two-man concept allow man concentrate 100% pedalling pilot can afford distracted pedalling need control airplane Dimensions Wingspan 123 0 being increased 138 length 28 8 wing area 600 sq ft empty weight 210 lbs Airfoil NACA 633618 Construction Wings have spars built spruce booms plywood webs balsa ribs forward part wings covered expanded polystyrene foam fuselage built up spruce balsa tail balsa Everything covered clear Melinex Wright MPA Mk 1 man-powered airplanes have built teams specialists pretty much work man Peter Wright started construction June 1971 lifted off following Feb ruary after amazingly short period work first flight covered 120 yards followed immediately others due technical problems Wright now finishing up improved machine due fly late 1975 early 1976 Dimensions Wingspan 710 length 20 0 wing area 486 sq ft empty weight 95 lbs Airfoil Wortman FX-08-S-l76 Its design speed range may oddest history aviation top speed 15 mph cruising speed 14 mph stalling speed 13 mph Construction The entire craft com bination carbon fibre balsa plastic foam covered Melinex now couple very advanced ideas have yet leave drawing board quite possibly never will Icarus brain-child TRW Systems engineer Dana L Hall group advanced students Its main features continued page 84 14 Model Aviation * THIN RIGID BLADES OF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIA FITCH 5%3 63 73/n3/n4 B3%456 94677 10466W 78W 106EW0 VA 7 8 116EW 11%67 126 125W 1356 1456 155 164 0W WIDE BLADE EW EXTRA WIDE ALL NEWI SERIES 400 B FOR SPEED & RACING NEW ADVANCED DESIGN TERRIFIC INCREASE IN THRUST & SPEED LEADING SPEED RECORD HOLDER 72 73 74 DIA PITCH 467 45 5 678EV 7566N7/ 10 11 8R99N 87747/ 977A7M 1213 N NARROW U QUE PLANS FOR GAS MODELERS E INCLUDB PATTERNS 42 BoOing P266 $14 ooO. F. 45 Rocing F4$3 P12 59 36 Eokkc Tape DRI $7 47 Coc Bocnk P6-E $15 38 Col 8 Spod XIII $10 47 GoIocnI Fl IC-2 $15 39 Col B Nioopol 11 $9 47 CcIC HnIIdicec $11 - Pp $8 48 Gb Glodiolon $10 0l Boo K $9 49 S 0oy4e 9Th$10 FB12B&C $11 50 PoIjI Plc P6$10 III Snonl 59 82 Slinon SW 087 $10 Pc 7F1 $11 57 Car 0lE Falcon 515 Macan MBl$14 57 CocSO3C1 Sno $14 57 Kononnc TninTo189 SE Boeing 89 BncIer$9 61 AEGGIVBOnIbO$17 6$ 009 038 CBS $12 66 Coo 02 Boo lit $10 62 0 Skyrocknl F5Pl $14 107 940dm 9481 $20 87 Lnd Lock Sic, $12 54 Sapec Spillico$13 MANS MANY MORE Radio Technique/Myers continued page 9 C M Duffield Thomaston Tex pointed out UJT temperature sensitive true Fig 7 shows effect temperature three devices study carefully will obtain enough information guide decisions about using devices first thing will notice addition Flight Lite made Advanced Devices Inc PO Box 152 Rockville Md 20850 first read Flyer newsletter PGRCC purchased Deluxe 48 Volt model $995 can buy standard model no plugs $695 unit weighs 2 grams fits drilled meas ures iameter X long An LED sticks out end pigtails connecting system stick out other switches bright steady glow extinction switching voltage Power-CYT virtually unaffected temperature effect Flight Lite small flashing range Corleys CVI quite broad low tem peratures very narrow high tern6 5 44 4 U F-J 0 3 320 2I 12 0 750 2 12 0 1350 12 0 FLIGHT LITE peratures Note numbers chart current drawn milliam peres proportional brightness brightness CVI changes 41 across flashing range low level range starts 4 volts irrespective tem perature Some people have expressed concern amount current drawn devices integrate current drawn over discharge time bat tery pack service will see power consumed order 5% available power Most people will stop fly ing 30% 50% battery power still pack just because dont know what have basis de vices extend flying time Thanks Bob Petrinec Power-CYT ex plan ation responses column far would seem want little elec tronic gadgets build simplified ex planations traditional RC techniques like bolt sizes propeller sizes hinging installations etc want something else address George M Myers 70 Froehlich Farm Road Hicksville NY 11801 320750 j350 4045 HDD 00 POWER- CYT FLASHING RANGE NUMBERS IN BOXES ARE MILLIAMPS AND SHOW RELATIVE BRIGHTNESS Man Power/Berliner continued page 14 tandem-wing arrangement re duces critical over-all wingspan slave/pilot combination steadily gaining popularity strangely curled-up wingtips designed control tip vortices may worth trouble build Dimensions Wingspan front wing 65 rear wing 80 length 19 wing area front wing 250 sq ft rear wing 300 sq ft 320 41 30 7 750 42 6 350 43 20 5 O00 CORLEY CVI empty weight 167 lbs flying weight 467 lbs Airfoil both wings Wortman FX-67K-170 Estimated cruising speed 22 mph Goodhart unusual design handiwork Rear Adm Nick Goodhart Royal Navy great men British sailplane move ment idea reduce induced drag much possible developing airplane can flown within 11/2 feet 84 Model Aviation HIGH PERFORMANCE * COMPETITION PROVEN ASK yOUR DEALER TEMPERATURE RESPONSES OF SAMPLE VOLTAGE -INDICATING PILOT LIGHTS QUICKEST MAIL SERVICE ground thus cutting induced drag much 90% make such flight possible Goodhart placed pilot pod either wingtip small canard sur face far out front guide should virtually eliminate tip losses Turns would made banking much guided missile does Dimensions Wingspan 100 length 31 wing area 794 sq ft empty weight under 300 lbs flying weight under 600 lbs Airfoil Wortman FX-63-137 Cruising speed estimated 16-17 mph other projects being actively worked such two-man biplane Massachusetts Institute Technology Its wings folded up wtis ready lift off its first flight however now being re-built Others far along something could pop out wood work moment builders man-powered airplanes often secretive side until theyre ready per form until something quite unexpected happens mighty aeronautical chal lenge will remain untouched Kremer Prize has claimed will stand tribute imagination man As beacon lighting way ward next outlandish goal could flapping-wing flight human flight kind wings Or. age radio compartment 1 wide 5 6 long 2 deep has some challenge hobby right things would like com ment about racing general drifting away scale aspect aircraft original intent NMPRA event emulate full scale racing So far Formula-One has main tained degree FAI 600 sq class has died USA because strange looking non-scale aircraft evolved over years Quarter Midget class has become very popular also partly due fact aircraft must look like full-scale aircraft has raced believe racing would adopt same rule planes should look like full scale aircraft necessarily racing plane least 85% 90% scale outline least watching group planes racing look like real aircraft lot teresting watching bunch square boxes wings spectators enjoy races can identify type aircraft participating races So much soap box month Next month will cover Quickie 500 class racing next step world RC racing Please send questions ideas gripes etc D K Lane 4477 W 136th St Hawthorne Calif 90250 will happy include material re ceived column Keep em flying go fast turn left Littlest Stick Spanning 19-1/2 in. 010 02 power tiny smooth fly ing responsive version Stick Con cept great fun plane may flown schoolyard large back yard Although fast agile skittery little planes means safe control Ace pulse system rudder-only utilizes Baby System Baby actuator Weight 575 oz Price $395 Ace R/C Inc Box 511 Higginsville Mo 64037 April 1976 85 RC Pylon/Lane continued page 19
Edition: Model Aviation - 1976/04
Page Numbers: 10, 11, 12, 13, 14, 84, 85
Man Power update Don Berliner NO MATTER outlandish challenge will always few people turned No matter far-fetched rules mere hint competition will excite impossible simply identifies goal prize goes unclaimed 15 years despite series brilliantly organized attempts upon makes chase exciting So has race develop man-powered airplane Years work create successful ultra-light airplane having less 20 hp both US Great Britain failed result anything halfway useful fly little power means very large wings very low weight thus wing load ings power loadings far outside sensible ranges silly things might fly well inside Astrodome-but taking Right Weybridge Mercury rest its wings unsupported air drooping gracefully has wing span early Lockheed Con stellation weight large St Bernard Photo British Ministry Defense spite years intense effort flights better part mile no one has completed Figure-8 course claim $114000 Kremer prize outside winds blow asking trouble dream flying almost no power remained topic otherwise empty hours uninspiring background ponder upon Englishman else proceeded create need class flying machines would make conventional ultra-light look compari son like heavily-loaded supersonic jet Industrialist Henry Kremer specified human power airplane could fly figure-8 around pylons half mile apart prize first $14000 Years later after raised over $100000 winning seemed quite impossible ever yet men tried men tried still men continue try Through odds have remained same Almost hopeless Kremer Prize seems safe first bicycle trip Moon Now dont get idea no manpowered airplane has ever flown Far least dozen different ones have cruised through calm friendly air close long flat runway pilots huffing puffing dear life Several have made flights 500 yards lasting czzzziiZI7 j7 1 ICARuS MAN POWERED AIRCRAFT 01 234 S6Sl0 SCALE IN PEE 10 Model Aviation WE YBRID GE POWERED AIRCRAFT 567o SCALE IN FEET minute yet goal mile flight around pylons seems far out reach today Kremer first waved money around 1959 Perhaps thats what makes inter esting Despite successes no seems have very clear idea go about developing airplane will fly figure-8 course problem nutshell ludi crous lack horsepower Laboratory field tests agree can expected healthy human about half horsepower Thats about what can get model aero engine 30 cu displacement As flying air plane pilot inside such power thats insane game people much interested playing game winning Just lifting human off ground means manpowered airplane must have take-off weight 100 lbs impossibly light structure vast wings needed lift such machine low speed gross weight must climb least 200 lbs Get 200-lb air plane flying haIfa horsepower Once basic dimensions arrived should have end serious thoughts about flying man-power alone Except course occasional nut thinks isnt bound same laws physics keep rest us stepping off space beginning end Just two years after Henry Kremer offered prize such foolishness first man-powered airplane took skies. can call air couple feet above runway skies Nov 9 1961 veteran modeler Derek Piggott pedalled way along runway Lasham Gliding Centre southwest London parted company native English soil alighted 50 yards away after having climbed way six feet altitude first time history man flown under own power week later second man-powered airplane flewthe Hatfield Groups Puf fin end year machine flown far 700 yards straight line made turns 800 Early 1962 Puffin pilot John Wim penny stayed aloft almost 1000 yards Progress rapid people could hardly blamed assuming milelong figure-8 flight Kremer Prize just matter time twas flight Wim penny remained unofficial world record 10 years no has yet ap proached turns achieved first months wasnt people werent trying nor werent learning others experiences Man-powered air planes flew during 1960s South Africa Japan Austria well Great Britain 1967 Henry Kremer apparently decided initial prize $14000 wasnt enough get job done doubled early 1970s saw still activity huge 120 wingspan Weybridge Dumbo flew 1971 followed few months later Jupiter considerably smaller 80 early 1972 Peter Wright flew 71 almost flying wing 120 yards first try month later Liver puffin flew built remains wrecked Puffin Liverpool University Prof Keith Sherwin students sport/trainer contender Kremer honors Action continued hot heavy rather cool very light June 1972 RAE FIt Lt John Potter set un official distance record 1171 yards 2/3 mile Jupiter end year first two-seatersthe Toucan built Hertfordshire Pedal Aeronautsflew July 1973 gone 700 yards turn page April1976 11 MAN 4 CFI4ieR John Thornhill typical free-flight modeler designed job heck Problem turns created super-long wing 4 I. 0 oo w z w Co 00 z 4 o LA n 0 0 0 0 ZWI 0 0 o5w0 04 4\ C d RIUIRED AIRFOIL KU 3010F CABANE IF PLASTIC TWO CHANNEL RADIO CONTROL UNIT LENGTH 306 OPERATES RUDDER AND ELEVATOR THRU U SERVO TABS E EVATION26 WHEEL 12 Model Aviation Li MAN POWERED AIRCRAFT BY NICK GOOD HART 0123 45 6 76 110 SCALE IN FEET Man Poweran Update As further encouragement Kremer 1973 upped still-unclaimed prize 50000 pounds worth about $105000 written still no has actually made attempt fly figure-8 course because making kind turn far harder flying straight thats tough enough reasons disturbingly basic order get man-powered air plane off ground must develop lift possible getting too heavy means very long wings reduce span-loading long wings air plane travelling less 20 mph turn ing will lose some its precious lift unless turn very very gradual course would mean flying far ther tighter turn will mean board wingtip will stand good chance stalling least dropping altitude few feet slight drop will bring tip ground Thats what can happen under ideal conditions about day wind blowing r kind day about 5 mph wind causes very serious problems before airplane ready launched Just imagine moving out hangar across field its wings least 100 feet wing loading empty little /4 lb/sq ft Thats about half wingloading good competition free-flight model. l doesnt have contend wings stretching 50 feet either side its fuselage Once man-powered craft posi tion fun begins pilot/athlete care fully positions himself skimpiest seats straps feet onto bicycle pedals handlers wingtips begins pedalling hes worth strange propeller7-l0 diameter made laminated balsa weighing around three poundsslowly begins turn airplane moves forward Its wings level themselves As reaches blazing speed 15 mph slowly lifts up height five feet Still very much ground-effect pilot straining muscle maintain power control great bird same time quietly sails along runway descends slides stop Assuming hasnt damaged spare pilot weather hasnt turned sour could another attempt isnt much time though because conditions permitting kind flying exist best short time after sunrise again just before sunset has calmcalmcalm obstacles handicaps drawbacks pile up Weather size power control weight Yet difficulties become obvious number seri ous well-organized groups talented people determined beat odds creases look some currently active projects couple really futuristic ideas should give some idea just what approaches seem hold best chances success Project Jupiter current record-holder man aged flown FIt Lt John Potter RAF Jupiter begun 1960 seriously damaged fire 1969 just before have completed finally flown Feb 9 1972 Its best date un official flight 1350 yards about two minutes Dimensions wingspan 80 length 29 6 wing area 300 sq ft empty weight 146 lbs flying weight 300 lbs Maximum speed 30 mph cruising speed 20 mph stalling speed 18 mph ceiling date 25-30 Airfoil NACA 653618 Weybridge Mercury Probably largest single-seat airplane ever flown built 1968-70 Dumbo help Royal Aero nautical Society British Aircraft Corp first flight glider pilot Chris Lovell controls Sept 18 1971 covered 50 yards returned shop modifications later transferred group owns Jupiter Dimensions Wingspan 120 4 length 21 0 wing area 485 sq ft empty weight 175 lbs Airfoils Wortman FX68-M-180 root FX68-M-160 mid-span FX68-M-140 tip Construction wings have aluminum alloy tube girder main spar balsa ribs leading trailing edges Fuselage has basic framework aluminum alloy tub ing balsa frames stringers tail has plywood spruce box-spar structure balsa ribs leading trailing edges entire airplane cov ered clear Melinex plastic Maximum speed estimated 16 mph stalling speed 11mph Toucan first successful two-man machine built 1967-72 Hertford shire Pedal Aeronauts group Handley Page engineers Its first flight Dec 23 1972 longest crewed Bryan Bowen Derek May 700 yards April 1976 13 72 \l/kI II liz Ed CF4ie~ JUPITER MAN POWERtO AIRCRAFT SCMA IN Fir Lc fr*f-~ Man PowerAn Update 15-20 altitude July 3 1973 idea behind two-man concept allow man concentrate 100% pedalling pilot can afford distracted pedalling need control airplane Dimensions Wingspan 123 0 being increased 138 length 28 8 wing area 600 sq ft empty weight 210 lbs Airfoil NACA 633618 Construction Wings have spars built spruce booms plywood webs balsa ribs forward part wings covered expanded polystyrene foam fuselage built up spruce balsa tail balsa Everything covered clear Melinex Wright MPA Mk 1 man-powered airplanes have built teams specialists pretty much work man Peter Wright started construction June 1971 lifted off following Feb ruary after amazingly short period work first flight covered 120 yards followed immediately others due technical problems Wright now finishing up improved machine due fly late 1975 early 1976 Dimensions Wingspan 710 length 20 0 wing area 486 sq ft empty weight 95 lbs Airfoil Wortman FX-08-S-l76 Its design speed range may oddest history aviation top speed 15 mph cruising speed 14 mph stalling speed 13 mph Construction The entire craft com bination carbon fibre balsa plastic foam covered Melinex now couple very advanced ideas have yet leave drawing board quite possibly never will Icarus brain-child TRW Systems engineer Dana L Hall group advanced students Its main features continued page 84 14 Model Aviation * THIN RIGID BLADES OF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIA FITCH 5%3 63 73/n3/n4 B3%456 94677 10466W 78W 106EW0 VA 7 8 116EW 11%67 126 125W 1356 1456 155 164 0W WIDE BLADE EW EXTRA WIDE ALL NEWI SERIES 400 B FOR SPEED & RACING NEW ADVANCED DESIGN TERRIFIC INCREASE IN THRUST & SPEED LEADING SPEED RECORD HOLDER 72 73 74 DIA PITCH 467 45 5 678EV 7566N7/ 10 11 8R99N 87747/ 977A7M 1213 N NARROW U QUE PLANS FOR GAS MODELERS E INCLUDB PATTERNS 42 BoOing P266 $14 ooO. F. 45 Rocing F4$3 P12 59 36 Eokkc Tape DRI $7 47 Coc Bocnk P6-E $15 38 Col 8 Spod XIII $10 47 GoIocnI Fl IC-2 $15 39 Col B Nioopol 11 $9 47 CcIC HnIIdicec $11 - Pp $8 48 Gb Glodiolon $10 0l Boo K $9 49 S 0oy4e 9Th$10 FB12B&C $11 50 PoIjI Plc P6$10 III Snonl 59 82 Slinon SW 087 $10 Pc 7F1 $11 57 Car 0lE Falcon 515 Macan MBl$14 57 CocSO3C1 Sno $14 57 Kononnc TninTo189 SE Boeing 89 BncIer$9 61 AEGGIVBOnIbO$17 6$ 009 038 CBS $12 66 Coo 02 Boo lit $10 62 0 Skyrocknl F5Pl $14 107 940dm 9481 $20 87 Lnd Lock Sic, $12 54 Sapec Spillico$13 MANS MANY MORE Radio Technique/Myers continued page 9 C M Duffield Thomaston Tex pointed out UJT temperature sensitive true Fig 7 shows effect temperature three devices study carefully will obtain enough information guide decisions about using devices first thing will notice addition Flight Lite made Advanced Devices Inc PO Box 152 Rockville Md 20850 first read Flyer newsletter PGRCC purchased Deluxe 48 Volt model $995 can buy standard model no plugs $695 unit weighs 2 grams fits drilled meas ures iameter X long An LED sticks out end pigtails connecting system stick out other switches bright steady glow extinction switching voltage Power-CYT virtually unaffected temperature effect Flight Lite small flashing range Corleys CVI quite broad low tem peratures very narrow high tern6 5 44 4 U F-J 0 3 320 2I 12 0 750 2 12 0 1350 12 0 FLIGHT LITE peratures Note numbers chart current drawn milliam peres proportional brightness brightness CVI changes 41 across flashing range low level range starts 4 volts irrespective tem perature Some people have expressed concern amount current drawn devices integrate current drawn over discharge time bat tery pack service will see power consumed order 5% available power Most people will stop fly ing 30% 50% battery power still pack just because dont know what have basis de vices extend flying time Thanks Bob Petrinec Power-CYT ex plan ation responses column far would seem want little elec tronic gadgets build simplified ex planations traditional RC techniques like bolt sizes propeller sizes hinging installations etc want something else address George M Myers 70 Froehlich Farm Road Hicksville NY 11801 320750 j350 4045 HDD 00 POWER- CYT FLASHING RANGE NUMBERS IN BOXES ARE MILLIAMPS AND SHOW RELATIVE BRIGHTNESS Man Power/Berliner continued page 14 tandem-wing arrangement re duces critical over-all wingspan slave/pilot combination steadily gaining popularity strangely curled-up wingtips designed control tip vortices may worth trouble build Dimensions Wingspan front wing 65 rear wing 80 length 19 wing area front wing 250 sq ft rear wing 300 sq ft 320 41 30 7 750 42 6 350 43 20 5 O00 CORLEY CVI empty weight 167 lbs flying weight 467 lbs Airfoil both wings Wortman FX-67K-170 Estimated cruising speed 22 mph Goodhart unusual design handiwork Rear Adm Nick Goodhart Royal Navy great men British sailplane move ment idea reduce induced drag much possible developing airplane can flown within 11/2 feet 84 Model Aviation HIGH PERFORMANCE * COMPETITION PROVEN ASK yOUR DEALER TEMPERATURE RESPONSES OF SAMPLE VOLTAGE -INDICATING PILOT LIGHTS QUICKEST MAIL SERVICE ground thus cutting induced drag much 90% make such flight possible Goodhart placed pilot pod either wingtip small canard sur face far out front guide should virtually eliminate tip losses Turns would made banking much guided missile does Dimensions Wingspan 100 length 31 wing area 794 sq ft empty weight under 300 lbs flying weight under 600 lbs Airfoil Wortman FX-63-137 Cruising speed estimated 16-17 mph other projects being actively worked such two-man biplane Massachusetts Institute Technology Its wings folded up wtis ready lift off its first flight however now being re-built Others far along something could pop out wood work moment builders man-powered airplanes often secretive side until theyre ready per form until something quite unexpected happens mighty aeronautical chal lenge will remain untouched Kremer Prize has claimed will stand tribute imagination man As beacon lighting way ward next outlandish goal could flapping-wing flight human flight kind wings Or. age radio compartment 1 wide 5 6 long 2 deep has some challenge hobby right things would like com ment about racing general drifting away scale aspect aircraft original intent NMPRA event emulate full scale racing So far Formula-One has main tained degree FAI 600 sq class has died USA because strange looking non-scale aircraft evolved over years Quarter Midget class has become very popular also partly due fact aircraft must look like full-scale aircraft has raced believe racing would adopt same rule planes should look like full scale aircraft necessarily racing plane least 85% 90% scale outline least watching group planes racing look like real aircraft lot teresting watching bunch square boxes wings spectators enjoy races can identify type aircraft participating races So much soap box month Next month will cover Quickie 500 class racing next step world RC racing Please send questions ideas gripes etc D K Lane 4477 W 136th St Hawthorne Calif 90250 will happy include material re ceived column Keep em flying go fast turn left Littlest Stick Spanning 19-1/2 in. 010 02 power tiny smooth fly ing responsive version Stick Con cept great fun plane may flown schoolyard large back yard Although fast agile skittery little planes means safe control Ace pulse system rudder-only utilizes Baby System Baby actuator Weight 575 oz Price $395 Ace R/C Inc Box 511 Higginsville Mo 64037 April 1976 85 RC Pylon/Lane continued page 19
Edition: Model Aviation - 1976/04
Page Numbers: 10, 11, 12, 13, 14, 84, 85
Man Power update Don Berliner NO MATTER outlandish challenge will always few people turned No matter far-fetched rules mere hint competition will excite impossible simply identifies goal prize goes unclaimed 15 years despite series brilliantly organized attempts upon makes chase exciting So has race develop man-powered airplane Years work create successful ultra-light airplane having less 20 hp both US Great Britain failed result anything halfway useful fly little power means very large wings very low weight thus wing load ings power loadings far outside sensible ranges silly things might fly well inside Astrodome-but taking Right Weybridge Mercury rest its wings unsupported air drooping gracefully has wing span early Lockheed Con stellation weight large St Bernard Photo British Ministry Defense spite years intense effort flights better part mile no one has completed Figure-8 course claim $114000 Kremer prize outside winds blow asking trouble dream flying almost no power remained topic otherwise empty hours uninspiring background ponder upon Englishman else proceeded create need class flying machines would make conventional ultra-light look compari son like heavily-loaded supersonic jet Industrialist Henry Kremer specified human power airplane could fly figure-8 around pylons half mile apart prize first $14000 Years later after raised over $100000 winning seemed quite impossible ever yet men tried men tried still men continue try Through odds have remained same Almost hopeless Kremer Prize seems safe first bicycle trip Moon Now dont get idea no manpowered airplane has ever flown Far least dozen different ones have cruised through calm friendly air close long flat runway pilots huffing puffing dear life Several have made flights 500 yards lasting czzzziiZI7 j7 1 ICARuS MAN POWERED AIRCRAFT 01 234 S6Sl0 SCALE IN PEE 10 Model Aviation WE YBRID GE POWERED AIRCRAFT 567o SCALE IN FEET minute yet goal mile flight around pylons seems far out reach today Kremer first waved money around 1959 Perhaps thats what makes inter esting Despite successes no seems have very clear idea go about developing airplane will fly figure-8 course problem nutshell ludi crous lack horsepower Laboratory field tests agree can expected healthy human about half horsepower Thats about what can get model aero engine 30 cu displacement As flying air plane pilot inside such power thats insane game people much interested playing game winning Just lifting human off ground means manpowered airplane must have take-off weight 100 lbs impossibly light structure vast wings needed lift such machine low speed gross weight must climb least 200 lbs Get 200-lb air plane flying haIfa horsepower Once basic dimensions arrived should have end serious thoughts about flying man-power alone Except course occasional nut thinks isnt bound same laws physics keep rest us stepping off space beginning end Just two years after Henry Kremer offered prize such foolishness first man-powered airplane took skies. can call air couple feet above runway skies Nov 9 1961 veteran modeler Derek Piggott pedalled way along runway Lasham Gliding Centre southwest London parted company native English soil alighted 50 yards away after having climbed way six feet altitude first time history man flown under own power week later second man-powered airplane flewthe Hatfield Groups Puf fin end year machine flown far 700 yards straight line made turns 800 Early 1962 Puffin pilot John Wim penny stayed aloft almost 1000 yards Progress rapid people could hardly blamed assuming milelong figure-8 flight Kremer Prize just matter time twas flight Wim penny remained unofficial world record 10 years no has yet ap proached turns achieved first months wasnt people werent trying nor werent learning others experiences Man-powered air planes flew during 1960s South Africa Japan Austria well Great Britain 1967 Henry Kremer apparently decided initial prize $14000 wasnt enough get job done doubled early 1970s saw still activity huge 120 wingspan Weybridge Dumbo flew 1971 followed few months later Jupiter considerably smaller 80 early 1972 Peter Wright flew 71 almost flying wing 120 yards first try month later Liver puffin flew built remains wrecked Puffin Liverpool University Prof Keith Sherwin students sport/trainer contender Kremer honors Action continued hot heavy rather cool very light June 1972 RAE FIt Lt John Potter set un official distance record 1171 yards 2/3 mile Jupiter end year first two-seatersthe Toucan built Hertfordshire Pedal Aeronautsflew July 1973 gone 700 yards turn page April1976 11 MAN 4 CFI4ieR John Thornhill typical free-flight modeler designed job heck Problem turns created super-long wing 4 I. 0 oo w z w Co 00 z 4 o LA n 0 0 0 0 ZWI 0 0 o5w0 04 4\ C d RIUIRED AIRFOIL KU 3010F CABANE IF PLASTIC TWO CHANNEL RADIO CONTROL UNIT LENGTH 306 OPERATES RUDDER AND ELEVATOR THRU U SERVO TABS E EVATION26 WHEEL 12 Model Aviation Li MAN POWERED AIRCRAFT BY NICK GOOD HART 0123 45 6 76 110 SCALE IN FEET Man Poweran Update As further encouragement Kremer 1973 upped still-unclaimed prize 50000 pounds worth about $105000 written still no has actually made attempt fly figure-8 course because making kind turn far harder flying straight thats tough enough reasons disturbingly basic order get man-powered air plane off ground must develop lift possible getting too heavy means very long wings reduce span-loading long wings air plane travelling less 20 mph turn ing will lose some its precious lift unless turn very very gradual course would mean flying far ther tighter turn will mean board wingtip will stand good chance stalling least dropping altitude few feet slight drop will bring tip ground Thats what can happen under ideal conditions about day wind blowing r kind day about 5 mph wind causes very serious problems before airplane ready launched Just imagine moving out hangar across field its wings least 100 feet wing loading empty little /4 lb/sq ft Thats about half wingloading good competition free-flight model. l doesnt have contend wings stretching 50 feet either side its fuselage Once man-powered craft posi tion fun begins pilot/athlete care fully positions himself skimpiest seats straps feet onto bicycle pedals handlers wingtips begins pedalling hes worth strange propeller7-l0 diameter made laminated balsa weighing around three poundsslowly begins turn airplane moves forward Its wings level themselves As reaches blazing speed 15 mph slowly lifts up height five feet Still very much ground-effect pilot straining muscle maintain power control great bird same time quietly sails along runway descends slides stop Assuming hasnt damaged spare pilot weather hasnt turned sour could another attempt isnt much time though because conditions permitting kind flying exist best short time after sunrise again just before sunset has calmcalmcalm obstacles handicaps drawbacks pile up Weather size power control weight Yet difficulties become obvious number seri ous well-organized groups talented people determined beat odds creases look some currently active projects couple really futuristic ideas should give some idea just what approaches seem hold best chances success Project Jupiter current record-holder man aged flown FIt Lt John Potter RAF Jupiter begun 1960 seriously damaged fire 1969 just before have completed finally flown Feb 9 1972 Its best date un official flight 1350 yards about two minutes Dimensions wingspan 80 length 29 6 wing area 300 sq ft empty weight 146 lbs flying weight 300 lbs Maximum speed 30 mph cruising speed 20 mph stalling speed 18 mph ceiling date 25-30 Airfoil NACA 653618 Weybridge Mercury Probably largest single-seat airplane ever flown built 1968-70 Dumbo help Royal Aero nautical Society British Aircraft Corp first flight glider pilot Chris Lovell controls Sept 18 1971 covered 50 yards returned shop modifications later transferred group owns Jupiter Dimensions Wingspan 120 4 length 21 0 wing area 485 sq ft empty weight 175 lbs Airfoils Wortman FX68-M-180 root FX68-M-160 mid-span FX68-M-140 tip Construction wings have aluminum alloy tube girder main spar balsa ribs leading trailing edges Fuselage has basic framework aluminum alloy tub ing balsa frames stringers tail has plywood spruce box-spar structure balsa ribs leading trailing edges entire airplane cov ered clear Melinex plastic Maximum speed estimated 16 mph stalling speed 11mph Toucan first successful two-man machine built 1967-72 Hertford shire Pedal Aeronauts group Handley Page engineers Its first flight Dec 23 1972 longest crewed Bryan Bowen Derek May 700 yards April 1976 13 72 \l/kI II liz Ed CF4ie~ JUPITER MAN POWERtO AIRCRAFT SCMA IN Fir Lc fr*f-~ Man PowerAn Update 15-20 altitude July 3 1973 idea behind two-man concept allow man concentrate 100% pedalling pilot can afford distracted pedalling need control airplane Dimensions Wingspan 123 0 being increased 138 length 28 8 wing area 600 sq ft empty weight 210 lbs Airfoil NACA 633618 Construction Wings have spars built spruce booms plywood webs balsa ribs forward part wings covered expanded polystyrene foam fuselage built up spruce balsa tail balsa Everything covered clear Melinex Wright MPA Mk 1 man-powered airplanes have built teams specialists pretty much work man Peter Wright started construction June 1971 lifted off following Feb ruary after amazingly short period work first flight covered 120 yards followed immediately others due technical problems Wright now finishing up improved machine due fly late 1975 early 1976 Dimensions Wingspan 710 length 20 0 wing area 486 sq ft empty weight 95 lbs Airfoil Wortman FX-08-S-l76 Its design speed range may oddest history aviation top speed 15 mph cruising speed 14 mph stalling speed 13 mph Construction The entire craft com bination carbon fibre balsa plastic foam covered Melinex now couple very advanced ideas have yet leave drawing board quite possibly never will Icarus brain-child TRW Systems engineer Dana L Hall group advanced students Its main features continued page 84 14 Model Aviation * THIN RIGID BLADES OF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIA FITCH 5%3 63 73/n3/n4 B3%456 94677 10466W 78W 106EW0 VA 7 8 116EW 11%67 126 125W 1356 1456 155 164 0W WIDE BLADE EW EXTRA WIDE ALL NEWI SERIES 400 B FOR SPEED & RACING NEW ADVANCED DESIGN TERRIFIC INCREASE IN THRUST & SPEED LEADING SPEED RECORD HOLDER 72 73 74 DIA PITCH 467 45 5 678EV 7566N7/ 10 11 8R99N 87747/ 977A7M 1213 N NARROW U QUE PLANS FOR GAS MODELERS E INCLUDB PATTERNS 42 BoOing P266 $14 ooO. F. 45 Rocing F4$3 P12 59 36 Eokkc Tape DRI $7 47 Coc Bocnk P6-E $15 38 Col 8 Spod XIII $10 47 GoIocnI Fl IC-2 $15 39 Col B Nioopol 11 $9 47 CcIC HnIIdicec $11 - Pp $8 48 Gb Glodiolon $10 0l Boo K $9 49 S 0oy4e 9Th$10 FB12B&C $11 50 PoIjI Plc P6$10 III Snonl 59 82 Slinon SW 087 $10 Pc 7F1 $11 57 Car 0lE Falcon 515 Macan MBl$14 57 CocSO3C1 Sno $14 57 Kononnc TninTo189 SE Boeing 89 BncIer$9 61 AEGGIVBOnIbO$17 6$ 009 038 CBS $12 66 Coo 02 Boo lit $10 62 0 Skyrocknl F5Pl $14 107 940dm 9481 $20 87 Lnd Lock Sic, $12 54 Sapec Spillico$13 MANS MANY MORE Radio Technique/Myers continued page 9 C M Duffield Thomaston Tex pointed out UJT temperature sensitive true Fig 7 shows effect temperature three devices study carefully will obtain enough information guide decisions about using devices first thing will notice addition Flight Lite made Advanced Devices Inc PO Box 152 Rockville Md 20850 first read Flyer newsletter PGRCC purchased Deluxe 48 Volt model $995 can buy standard model no plugs $695 unit weighs 2 grams fits drilled meas ures iameter X long An LED sticks out end pigtails connecting system stick out other switches bright steady glow extinction switching voltage Power-CYT virtually unaffected temperature effect Flight Lite small flashing range Corleys CVI quite broad low tem peratures very narrow high tern6 5 44 4 U F-J 0 3 320 2I 12 0 750 2 12 0 1350 12 0 FLIGHT LITE peratures Note numbers chart current drawn milliam peres proportional brightness brightness CVI changes 41 across flashing range low level range starts 4 volts irrespective tem perature Some people have expressed concern amount current drawn devices integrate current drawn over discharge time bat tery pack service will see power consumed order 5% available power Most people will stop fly ing 30% 50% battery power still pack just because dont know what have basis de vices extend flying time Thanks Bob Petrinec Power-CYT ex plan ation responses column far would seem want little elec tronic gadgets build simplified ex planations traditional RC techniques like bolt sizes propeller sizes hinging installations etc want something else address George M Myers 70 Froehlich Farm Road Hicksville NY 11801 320750 j350 4045 HDD 00 POWER- CYT FLASHING RANGE NUMBERS IN BOXES ARE MILLIAMPS AND SHOW RELATIVE BRIGHTNESS Man Power/Berliner continued page 14 tandem-wing arrangement re duces critical over-all wingspan slave/pilot combination steadily gaining popularity strangely curled-up wingtips designed control tip vortices may worth trouble build Dimensions Wingspan front wing 65 rear wing 80 length 19 wing area front wing 250 sq ft rear wing 300 sq ft 320 41 30 7 750 42 6 350 43 20 5 O00 CORLEY CVI empty weight 167 lbs flying weight 467 lbs Airfoil both wings Wortman FX-67K-170 Estimated cruising speed 22 mph Goodhart unusual design handiwork Rear Adm Nick Goodhart Royal Navy great men British sailplane move ment idea reduce induced drag much possible developing airplane can flown within 11/2 feet 84 Model Aviation HIGH PERFORMANCE * COMPETITION PROVEN ASK yOUR DEALER TEMPERATURE RESPONSES OF SAMPLE VOLTAGE -INDICATING PILOT LIGHTS QUICKEST MAIL SERVICE ground thus cutting induced drag much 90% make such flight possible Goodhart placed pilot pod either wingtip small canard sur face far out front guide should virtually eliminate tip losses Turns would made banking much guided missile does Dimensions Wingspan 100 length 31 wing area 794 sq ft empty weight under 300 lbs flying weight under 600 lbs Airfoil Wortman FX-63-137 Cruising speed estimated 16-17 mph other projects being actively worked such two-man biplane Massachusetts Institute Technology Its wings folded up wtis ready lift off its first flight however now being re-built Others far along something could pop out wood work moment builders man-powered airplanes often secretive side until theyre ready per form until something quite unexpected happens mighty aeronautical chal lenge will remain untouched Kremer Prize has claimed will stand tribute imagination man As beacon lighting way ward next outlandish goal could flapping-wing flight human flight kind wings Or. age radio compartment 1 wide 5 6 long 2 deep has some challenge hobby right things would like com ment about racing general drifting away scale aspect aircraft original intent NMPRA event emulate full scale racing So far Formula-One has main tained degree FAI 600 sq class has died USA because strange looking non-scale aircraft evolved over years Quarter Midget class has become very popular also partly due fact aircraft must look like full-scale aircraft has raced believe racing would adopt same rule planes should look like full scale aircraft necessarily racing plane least 85% 90% scale outline least watching group planes racing look like real aircraft lot teresting watching bunch square boxes wings spectators enjoy races can identify type aircraft participating races So much soap box month Next month will cover Quickie 500 class racing next step world RC racing Please send questions ideas gripes etc D K Lane 4477 W 136th St Hawthorne Calif 90250 will happy include material re ceived column Keep em flying go fast turn left Littlest Stick Spanning 19-1/2 in. 010 02 power tiny smooth fly ing responsive version Stick Con cept great fun plane may flown schoolyard large back yard Although fast agile skittery little planes means safe control Ace pulse system rudder-only utilizes Baby System Baby actuator Weight 575 oz Price $395 Ace R/C Inc Box 511 Higginsville Mo 64037 April 1976 85 RC Pylon/Lane continued page 19
Edition: Model Aviation - 1976/04
Page Numbers: 10, 11, 12, 13, 14, 84, 85
Man Power update Don Berliner NO MATTER outlandish challenge will always few people turned No matter far-fetched rules mere hint competition will excite impossible simply identifies goal prize goes unclaimed 15 years despite series brilliantly organized attempts upon makes chase exciting So has race develop man-powered airplane Years work create successful ultra-light airplane having less 20 hp both US Great Britain failed result anything halfway useful fly little power means very large wings very low weight thus wing load ings power loadings far outside sensible ranges silly things might fly well inside Astrodome-but taking Right Weybridge Mercury rest its wings unsupported air drooping gracefully has wing span early Lockheed Con stellation weight large St Bernard Photo British Ministry Defense spite years intense effort flights better part mile no one has completed Figure-8 course claim $114000 Kremer prize outside winds blow asking trouble dream flying almost no power remained topic otherwise empty hours uninspiring background ponder upon Englishman else proceeded create need class flying machines would make conventional ultra-light look compari son like heavily-loaded supersonic jet Industrialist Henry Kremer specified human power airplane could fly figure-8 around pylons half mile apart prize first $14000 Years later after raised over $100000 winning seemed quite impossible ever yet men tried men tried still men continue try Through odds have remained same Almost hopeless Kremer Prize seems safe first bicycle trip Moon Now dont get idea no manpowered airplane has ever flown Far least dozen different ones have cruised through calm friendly air close long flat runway pilots huffing puffing dear life Several have made flights 500 yards lasting czzzziiZI7 j7 1 ICARuS MAN POWERED AIRCRAFT 01 234 S6Sl0 SCALE IN PEE 10 Model Aviation WE YBRID GE POWERED AIRCRAFT 567o SCALE IN FEET minute yet goal mile flight around pylons seems far out reach today Kremer first waved money around 1959 Perhaps thats what makes inter esting Despite successes no seems have very clear idea go about developing airplane will fly figure-8 course problem nutshell ludi crous lack horsepower Laboratory field tests agree can expected healthy human about half horsepower Thats about what can get model aero engine 30 cu displacement As flying air plane pilot inside such power thats insane game people much interested playing game winning Just lifting human off ground means manpowered airplane must have take-off weight 100 lbs impossibly light structure vast wings needed lift such machine low speed gross weight must climb least 200 lbs Get 200-lb air plane flying haIfa horsepower Once basic dimensions arrived should have end serious thoughts about flying man-power alone Except course occasional nut thinks isnt bound same laws physics keep rest us stepping off space beginning end Just two years after Henry Kremer offered prize such foolishness first man-powered airplane took skies. can call air couple feet above runway skies Nov 9 1961 veteran modeler Derek Piggott pedalled way along runway Lasham Gliding Centre southwest London parted company native English soil alighted 50 yards away after having climbed way six feet altitude first time history man flown under own power week later second man-powered airplane flewthe Hatfield Groups Puf fin end year machine flown far 700 yards straight line made turns 800 Early 1962 Puffin pilot John Wim penny stayed aloft almost 1000 yards Progress rapid people could hardly blamed assuming milelong figure-8 flight Kremer Prize just matter time twas flight Wim penny remained unofficial world record 10 years no has yet ap proached turns achieved first months wasnt people werent trying nor werent learning others experiences Man-powered air planes flew during 1960s South Africa Japan Austria well Great Britain 1967 Henry Kremer apparently decided initial prize $14000 wasnt enough get job done doubled early 1970s saw still activity huge 120 wingspan Weybridge Dumbo flew 1971 followed few months later Jupiter considerably smaller 80 early 1972 Peter Wright flew 71 almost flying wing 120 yards first try month later Liver puffin flew built remains wrecked Puffin Liverpool University Prof Keith Sherwin students sport/trainer contender Kremer honors Action continued hot heavy rather cool very light June 1972 RAE FIt Lt John Potter set un official distance record 1171 yards 2/3 mile Jupiter end year first two-seatersthe Toucan built Hertfordshire Pedal Aeronautsflew July 1973 gone 700 yards turn page April1976 11 MAN 4 CFI4ieR John Thornhill typical free-flight modeler designed job heck Problem turns created super-long wing 4 I. 0 oo w z w Co 00 z 4 o LA n 0 0 0 0 ZWI 0 0 o5w0 04 4\ C d RIUIRED AIRFOIL KU 3010F CABANE IF PLASTIC TWO CHANNEL RADIO CONTROL UNIT LENGTH 306 OPERATES RUDDER AND ELEVATOR THRU U SERVO TABS E EVATION26 WHEEL 12 Model Aviation Li MAN POWERED AIRCRAFT BY NICK GOOD HART 0123 45 6 76 110 SCALE IN FEET Man Poweran Update As further encouragement Kremer 1973 upped still-unclaimed prize 50000 pounds worth about $105000 written still no has actually made attempt fly figure-8 course because making kind turn far harder flying straight thats tough enough reasons disturbingly basic order get man-powered air plane off ground must develop lift possible getting too heavy means very long wings reduce span-loading long wings air plane travelling less 20 mph turn ing will lose some its precious lift unless turn very very gradual course would mean flying far ther tighter turn will mean board wingtip will stand good chance stalling least dropping altitude few feet slight drop will bring tip ground Thats what can happen under ideal conditions about day wind blowing r kind day about 5 mph wind causes very serious problems before airplane ready launched Just imagine moving out hangar across field its wings least 100 feet wing loading empty little /4 lb/sq ft Thats about half wingloading good competition free-flight model. l doesnt have contend wings stretching 50 feet either side its fuselage Once man-powered craft posi tion fun begins pilot/athlete care fully positions himself skimpiest seats straps feet onto bicycle pedals handlers wingtips begins pedalling hes worth strange propeller7-l0 diameter made laminated balsa weighing around three poundsslowly begins turn airplane moves forward Its wings level themselves As reaches blazing speed 15 mph slowly lifts up height five feet Still very much ground-effect pilot straining muscle maintain power control great bird same time quietly sails along runway descends slides stop Assuming hasnt damaged spare pilot weather hasnt turned sour could another attempt isnt much time though because conditions permitting kind flying exist best short time after sunrise again just before sunset has calmcalmcalm obstacles handicaps drawbacks pile up Weather size power control weight Yet difficulties become obvious number seri ous well-organized groups talented people determined beat odds creases look some currently active projects couple really futuristic ideas should give some idea just what approaches seem hold best chances success Project Jupiter current record-holder man aged flown FIt Lt John Potter RAF Jupiter begun 1960 seriously damaged fire 1969 just before have completed finally flown Feb 9 1972 Its best date un official flight 1350 yards about two minutes Dimensions wingspan 80 length 29 6 wing area 300 sq ft empty weight 146 lbs flying weight 300 lbs Maximum speed 30 mph cruising speed 20 mph stalling speed 18 mph ceiling date 25-30 Airfoil NACA 653618 Weybridge Mercury Probably largest single-seat airplane ever flown built 1968-70 Dumbo help Royal Aero nautical Society British Aircraft Corp first flight glider pilot Chris Lovell controls Sept 18 1971 covered 50 yards returned shop modifications later transferred group owns Jupiter Dimensions Wingspan 120 4 length 21 0 wing area 485 sq ft empty weight 175 lbs Airfoils Wortman FX68-M-180 root FX68-M-160 mid-span FX68-M-140 tip Construction wings have aluminum alloy tube girder main spar balsa ribs leading trailing edges Fuselage has basic framework aluminum alloy tub ing balsa frames stringers tail has plywood spruce box-spar structure balsa ribs leading trailing edges entire airplane cov ered clear Melinex plastic Maximum speed estimated 16 mph stalling speed 11mph Toucan first successful two-man machine built 1967-72 Hertford shire Pedal Aeronauts group Handley Page engineers Its first flight Dec 23 1972 longest crewed Bryan Bowen Derek May 700 yards April 1976 13 72 \l/kI II liz Ed CF4ie~ JUPITER MAN POWERtO AIRCRAFT SCMA IN Fir Lc fr*f-~ Man PowerAn Update 15-20 altitude July 3 1973 idea behind two-man concept allow man concentrate 100% pedalling pilot can afford distracted pedalling need control airplane Dimensions Wingspan 123 0 being increased 138 length 28 8 wing area 600 sq ft empty weight 210 lbs Airfoil NACA 633618 Construction Wings have spars built spruce booms plywood webs balsa ribs forward part wings covered expanded polystyrene foam fuselage built up spruce balsa tail balsa Everything covered clear Melinex Wright MPA Mk 1 man-powered airplanes have built teams specialists pretty much work man Peter Wright started construction June 1971 lifted off following Feb ruary after amazingly short period work first flight covered 120 yards followed immediately others due technical problems Wright now finishing up improved machine due fly late 1975 early 1976 Dimensions Wingspan 710 length 20 0 wing area 486 sq ft empty weight 95 lbs Airfoil Wortman FX-08-S-l76 Its design speed range may oddest history aviation top speed 15 mph cruising speed 14 mph stalling speed 13 mph Construction The entire craft com bination carbon fibre balsa plastic foam covered Melinex now couple very advanced ideas have yet leave drawing board quite possibly never will Icarus brain-child TRW Systems engineer Dana L Hall group advanced students Its main features continued page 84 14 Model Aviation * THIN RIGID BLADES OF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIA FITCH 5%3 63 73/n3/n4 B3%456 94677 10466W 78W 106EW0 VA 7 8 116EW 11%67 126 125W 1356 1456 155 164 0W WIDE BLADE EW EXTRA WIDE ALL NEWI SERIES 400 B FOR SPEED & RACING NEW ADVANCED DESIGN TERRIFIC INCREASE IN THRUST & SPEED LEADING SPEED RECORD HOLDER 72 73 74 DIA PITCH 467 45 5 678EV 7566N7/ 10 11 8R99N 87747/ 977A7M 1213 N NARROW U QUE PLANS FOR GAS MODELERS E INCLUDB PATTERNS 42 BoOing P266 $14 ooO. F. 45 Rocing F4$3 P12 59 36 Eokkc Tape DRI $7 47 Coc Bocnk P6-E $15 38 Col 8 Spod XIII $10 47 GoIocnI Fl IC-2 $15 39 Col B Nioopol 11 $9 47 CcIC HnIIdicec $11 - Pp $8 48 Gb Glodiolon $10 0l Boo K $9 49 S 0oy4e 9Th$10 FB12B&C $11 50 PoIjI Plc P6$10 III Snonl 59 82 Slinon SW 087 $10 Pc 7F1 $11 57 Car 0lE Falcon 515 Macan MBl$14 57 CocSO3C1 Sno $14 57 Kononnc TninTo189 SE Boeing 89 BncIer$9 61 AEGGIVBOnIbO$17 6$ 009 038 CBS $12 66 Coo 02 Boo lit $10 62 0 Skyrocknl F5Pl $14 107 940dm 9481 $20 87 Lnd Lock Sic, $12 54 Sapec Spillico$13 MANS MANY MORE Radio Technique/Myers continued page 9 C M Duffield Thomaston Tex pointed out UJT temperature sensitive true Fig 7 shows effect temperature three devices study carefully will obtain enough information guide decisions about using devices first thing will notice addition Flight Lite made Advanced Devices Inc PO Box 152 Rockville Md 20850 first read Flyer newsletter PGRCC purchased Deluxe 48 Volt model $995 can buy standard model no plugs $695 unit weighs 2 grams fits drilled meas ures iameter X long An LED sticks out end pigtails connecting system stick out other switches bright steady glow extinction switching voltage Power-CYT virtually unaffected temperature effect Flight Lite small flashing range Corleys CVI quite broad low tem peratures very narrow high tern6 5 44 4 U F-J 0 3 320 2I 12 0 750 2 12 0 1350 12 0 FLIGHT LITE peratures Note numbers chart current drawn milliam peres proportional brightness brightness CVI changes 41 across flashing range low level range starts 4 volts irrespective tem perature Some people have expressed concern amount current drawn devices integrate current drawn over discharge time bat tery pack service will see power consumed order 5% available power Most people will stop fly ing 30% 50% battery power still pack just because dont know what have basis de vices extend flying time Thanks Bob Petrinec Power-CYT ex plan ation responses column far would seem want little elec tronic gadgets build simplified ex planations traditional RC techniques like bolt sizes propeller sizes hinging installations etc want something else address George M Myers 70 Froehlich Farm Road Hicksville NY 11801 320750 j350 4045 HDD 00 POWER- CYT FLASHING RANGE NUMBERS IN BOXES ARE MILLIAMPS AND SHOW RELATIVE BRIGHTNESS Man Power/Berliner continued page 14 tandem-wing arrangement re duces critical over-all wingspan slave/pilot combination steadily gaining popularity strangely curled-up wingtips designed control tip vortices may worth trouble build Dimensions Wingspan front wing 65 rear wing 80 length 19 wing area front wing 250 sq ft rear wing 300 sq ft 320 41 30 7 750 42 6 350 43 20 5 O00 CORLEY CVI empty weight 167 lbs flying weight 467 lbs Airfoil both wings Wortman FX-67K-170 Estimated cruising speed 22 mph Goodhart unusual design handiwork Rear Adm Nick Goodhart Royal Navy great men British sailplane move ment idea reduce induced drag much possible developing airplane can flown within 11/2 feet 84 Model Aviation HIGH PERFORMANCE * COMPETITION PROVEN ASK yOUR DEALER TEMPERATURE RESPONSES OF SAMPLE VOLTAGE -INDICATING PILOT LIGHTS QUICKEST MAIL SERVICE ground thus cutting induced drag much 90% make such flight possible Goodhart placed pilot pod either wingtip small canard sur face far out front guide should virtually eliminate tip losses Turns would made banking much guided missile does Dimensions Wingspan 100 length 31 wing area 794 sq ft empty weight under 300 lbs flying weight under 600 lbs Airfoil Wortman FX-63-137 Cruising speed estimated 16-17 mph other projects being actively worked such two-man biplane Massachusetts Institute Technology Its wings folded up wtis ready lift off its first flight however now being re-built Others far along something could pop out wood work moment builders man-powered airplanes often secretive side until theyre ready per form until something quite unexpected happens mighty aeronautical chal lenge will remain untouched Kremer Prize has claimed will stand tribute imagination man As beacon lighting way ward next outlandish goal could flapping-wing flight human flight kind wings Or. age radio compartment 1 wide 5 6 long 2 deep has some challenge hobby right things would like com ment about racing general drifting away scale aspect aircraft original intent NMPRA event emulate full scale racing So far Formula-One has main tained degree FAI 600 sq class has died USA because strange looking non-scale aircraft evolved over years Quarter Midget class has become very popular also partly due fact aircraft must look like full-scale aircraft has raced believe racing would adopt same rule planes should look like full scale aircraft necessarily racing plane least 85% 90% scale outline least watching group planes racing look like real aircraft lot teresting watching bunch square boxes wings spectators enjoy races can identify type aircraft participating races So much soap box month Next month will cover Quickie 500 class racing next step world RC racing Please send questions ideas gripes etc D K Lane 4477 W 136th St Hawthorne Calif 90250 will happy include material re ceived column Keep em flying go fast turn left Littlest Stick Spanning 19-1/2 in. 010 02 power tiny smooth fly ing responsive version Stick Con cept great fun plane may flown schoolyard large back yard Although fast agile skittery little planes means safe control Ace pulse system rudder-only utilizes Baby System Baby actuator Weight 575 oz Price $395 Ace R/C Inc Box 511 Higginsville Mo 64037 April 1976 85 RC Pylon/Lane continued page 19
Edition: Model Aviation - 1976/04
Page Numbers: 10, 11, 12, 13, 14, 84, 85
Man Power update Don Berliner NO MATTER outlandish challenge will always few people turned No matter far-fetched rules mere hint competition will excite impossible simply identifies goal prize goes unclaimed 15 years despite series brilliantly organized attempts upon makes chase exciting So has race develop man-powered airplane Years work create successful ultra-light airplane having less 20 hp both US Great Britain failed result anything halfway useful fly little power means very large wings very low weight thus wing load ings power loadings far outside sensible ranges silly things might fly well inside Astrodome-but taking Right Weybridge Mercury rest its wings unsupported air drooping gracefully has wing span early Lockheed Con stellation weight large St Bernard Photo British Ministry Defense spite years intense effort flights better part mile no one has completed Figure-8 course claim $114000 Kremer prize outside winds blow asking trouble dream flying almost no power remained topic otherwise empty hours uninspiring background ponder upon Englishman else proceeded create need class flying machines would make conventional ultra-light look compari son like heavily-loaded supersonic jet Industrialist Henry Kremer specified human power airplane could fly figure-8 around pylons half mile apart prize first $14000 Years later after raised over $100000 winning seemed quite impossible ever yet men tried men tried still men continue try Through odds have remained same Almost hopeless Kremer Prize seems safe first bicycle trip Moon Now dont get idea no manpowered airplane has ever flown Far least dozen different ones have cruised through calm friendly air close long flat runway pilots huffing puffing dear life Several have made flights 500 yards lasting czzzziiZI7 j7 1 ICARuS MAN POWERED AIRCRAFT 01 234 S6Sl0 SCALE IN PEE 10 Model Aviation WE YBRID GE POWERED AIRCRAFT 567o SCALE IN FEET minute yet goal mile flight around pylons seems far out reach today Kremer first waved money around 1959 Perhaps thats what makes inter esting Despite successes no seems have very clear idea go about developing airplane will fly figure-8 course problem nutshell ludi crous lack horsepower Laboratory field tests agree can expected healthy human about half horsepower Thats about what can get model aero engine 30 cu displacement As flying air plane pilot inside such power thats insane game people much interested playing game winning Just lifting human off ground means manpowered airplane must have take-off weight 100 lbs impossibly light structure vast wings needed lift such machine low speed gross weight must climb least 200 lbs Get 200-lb air plane flying haIfa horsepower Once basic dimensions arrived should have end serious thoughts about flying man-power alone Except course occasional nut thinks isnt bound same laws physics keep rest us stepping off space beginning end Just two years after Henry Kremer offered prize such foolishness first man-powered airplane took skies. can call air couple feet above runway skies Nov 9 1961 veteran modeler Derek Piggott pedalled way along runway Lasham Gliding Centre southwest London parted company native English soil alighted 50 yards away after having climbed way six feet altitude first time history man flown under own power week later second man-powered airplane flewthe Hatfield Groups Puf fin end year machine flown far 700 yards straight line made turns 800 Early 1962 Puffin pilot John Wim penny stayed aloft almost 1000 yards Progress rapid people could hardly blamed assuming milelong figure-8 flight Kremer Prize just matter time twas flight Wim penny remained unofficial world record 10 years no has yet ap proached turns achieved first months wasnt people werent trying nor werent learning others experiences Man-powered air planes flew during 1960s South Africa Japan Austria well Great Britain 1967 Henry Kremer apparently decided initial prize $14000 wasnt enough get job done doubled early 1970s saw still activity huge 120 wingspan Weybridge Dumbo flew 1971 followed few months later Jupiter considerably smaller 80 early 1972 Peter Wright flew 71 almost flying wing 120 yards first try month later Liver puffin flew built remains wrecked Puffin Liverpool University Prof Keith Sherwin students sport/trainer contender Kremer honors Action continued hot heavy rather cool very light June 1972 RAE FIt Lt John Potter set un official distance record 1171 yards 2/3 mile Jupiter end year first two-seatersthe Toucan built Hertfordshire Pedal Aeronautsflew July 1973 gone 700 yards turn page April1976 11 MAN 4 CFI4ieR John Thornhill typical free-flight modeler designed job heck Problem turns created super-long wing 4 I. 0 oo w z w Co 00 z 4 o LA n 0 0 0 0 ZWI 0 0 o5w0 04 4\ C d RIUIRED AIRFOIL KU 3010F CABANE IF PLASTIC TWO CHANNEL RADIO CONTROL UNIT LENGTH 306 OPERATES RUDDER AND ELEVATOR THRU U SERVO TABS E EVATION26 WHEEL 12 Model Aviation Li MAN POWERED AIRCRAFT BY NICK GOOD HART 0123 45 6 76 110 SCALE IN FEET Man Poweran Update As further encouragement Kremer 1973 upped still-unclaimed prize 50000 pounds worth about $105000 written still no has actually made attempt fly figure-8 course because making kind turn far harder flying straight thats tough enough reasons disturbingly basic order get man-powered air plane off ground must develop lift possible getting too heavy means very long wings reduce span-loading long wings air plane travelling less 20 mph turn ing will lose some its precious lift unless turn very very gradual course would mean flying far ther tighter turn will mean board wingtip will stand good chance stalling least dropping altitude few feet slight drop will bring tip ground Thats what can happen under ideal conditions about day wind blowing r kind day about 5 mph wind causes very serious problems before airplane ready launched Just imagine moving out hangar across field its wings least 100 feet wing loading empty little /4 lb/sq ft Thats about half wingloading good competition free-flight model. l doesnt have contend wings stretching 50 feet either side its fuselage Once man-powered craft posi tion fun begins pilot/athlete care fully positions himself skimpiest seats straps feet onto bicycle pedals handlers wingtips begins pedalling hes worth strange propeller7-l0 diameter made laminated balsa weighing around three poundsslowly begins turn airplane moves forward Its wings level themselves As reaches blazing speed 15 mph slowly lifts up height five feet Still very much ground-effect pilot straining muscle maintain power control great bird same time quietly sails along runway descends slides stop Assuming hasnt damaged spare pilot weather hasnt turned sour could another attempt isnt much time though because conditions permitting kind flying exist best short time after sunrise again just before sunset has calmcalmcalm obstacles handicaps drawbacks pile up Weather size power control weight Yet difficulties become obvious number seri ous well-organized groups talented people determined beat odds creases look some currently active projects couple really futuristic ideas should give some idea just what approaches seem hold best chances success Project Jupiter current record-holder man aged flown FIt Lt John Potter RAF Jupiter begun 1960 seriously damaged fire 1969 just before have completed finally flown Feb 9 1972 Its best date un official flight 1350 yards about two minutes Dimensions wingspan 80 length 29 6 wing area 300 sq ft empty weight 146 lbs flying weight 300 lbs Maximum speed 30 mph cruising speed 20 mph stalling speed 18 mph ceiling date 25-30 Airfoil NACA 653618 Weybridge Mercury Probably largest single-seat airplane ever flown built 1968-70 Dumbo help Royal Aero nautical Society British Aircraft Corp first flight glider pilot Chris Lovell controls Sept 18 1971 covered 50 yards returned shop modifications later transferred group owns Jupiter Dimensions Wingspan 120 4 length 21 0 wing area 485 sq ft empty weight 175 lbs Airfoils Wortman FX68-M-180 root FX68-M-160 mid-span FX68-M-140 tip Construction wings have aluminum alloy tube girder main spar balsa ribs leading trailing edges Fuselage has basic framework aluminum alloy tub ing balsa frames stringers tail has plywood spruce box-spar structure balsa ribs leading trailing edges entire airplane cov ered clear Melinex plastic Maximum speed estimated 16 mph stalling speed 11mph Toucan first successful two-man machine built 1967-72 Hertford shire Pedal Aeronauts group Handley Page engineers Its first flight Dec 23 1972 longest crewed Bryan Bowen Derek May 700 yards April 1976 13 72 \l/kI II liz Ed CF4ie~ JUPITER MAN POWERtO AIRCRAFT SCMA IN Fir Lc fr*f-~ Man PowerAn Update 15-20 altitude July 3 1973 idea behind two-man concept allow man concentrate 100% pedalling pilot can afford distracted pedalling need control airplane Dimensions Wingspan 123 0 being increased 138 length 28 8 wing area 600 sq ft empty weight 210 lbs Airfoil NACA 633618 Construction Wings have spars built spruce booms plywood webs balsa ribs forward part wings covered expanded polystyrene foam fuselage built up spruce balsa tail balsa Everything covered clear Melinex Wright MPA Mk 1 man-powered airplanes have built teams specialists pretty much work man Peter Wright started construction June 1971 lifted off following Feb ruary after amazingly short period work first flight covered 120 yards followed immediately others due technical problems Wright now finishing up improved machine due fly late 1975 early 1976 Dimensions Wingspan 710 length 20 0 wing area 486 sq ft empty weight 95 lbs Airfoil Wortman FX-08-S-l76 Its design speed range may oddest history aviation top speed 15 mph cruising speed 14 mph stalling speed 13 mph Construction The entire craft com bination carbon fibre balsa plastic foam covered Melinex now couple very advanced ideas have yet leave drawing board quite possibly never will Icarus brain-child TRW Systems engineer Dana L Hall group advanced students Its main features continued page 84 14 Model Aviation * THIN RIGID BLADES OF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIA FITCH 5%3 63 73/n3/n4 B3%456 94677 10466W 78W 106EW0 VA 7 8 116EW 11%67 126 125W 1356 1456 155 164 0W WIDE BLADE EW EXTRA WIDE ALL NEWI SERIES 400 B FOR SPEED & RACING NEW ADVANCED DESIGN TERRIFIC INCREASE IN THRUST & SPEED LEADING SPEED RECORD HOLDER 72 73 74 DIA PITCH 467 45 5 678EV 7566N7/ 10 11 8R99N 87747/ 977A7M 1213 N NARROW U QUE PLANS FOR GAS MODELERS E INCLUDB PATTERNS 42 BoOing P266 $14 ooO. F. 45 Rocing F4$3 P12 59 36 Eokkc Tape DRI $7 47 Coc Bocnk P6-E $15 38 Col 8 Spod XIII $10 47 GoIocnI Fl IC-2 $15 39 Col B Nioopol 11 $9 47 CcIC HnIIdicec $11 - Pp $8 48 Gb Glodiolon $10 0l Boo K $9 49 S 0oy4e 9Th$10 FB12B&C $11 50 PoIjI Plc P6$10 III Snonl 59 82 Slinon SW 087 $10 Pc 7F1 $11 57 Car 0lE Falcon 515 Macan MBl$14 57 CocSO3C1 Sno $14 57 Kononnc TninTo189 SE Boeing 89 BncIer$9 61 AEGGIVBOnIbO$17 6$ 009 038 CBS $12 66 Coo 02 Boo lit $10 62 0 Skyrocknl F5Pl $14 107 940dm 9481 $20 87 Lnd Lock Sic, $12 54 Sapec Spillico$13 MANS MANY MORE Radio Technique/Myers continued page 9 C M Duffield Thomaston Tex pointed out UJT temperature sensitive true Fig 7 shows effect temperature three devices study carefully will obtain enough information guide decisions about using devices first thing will notice addition Flight Lite made Advanced Devices Inc PO Box 152 Rockville Md 20850 first read Flyer newsletter PGRCC purchased Deluxe 48 Volt model $995 can buy standard model no plugs $695 unit weighs 2 grams fits drilled meas ures iameter X long An LED sticks out end pigtails connecting system stick out other switches bright steady glow extinction switching voltage Power-CYT virtually unaffected temperature effect Flight Lite small flashing range Corleys CVI quite broad low tem peratures very narrow high tern6 5 44 4 U F-J 0 3 320 2I 12 0 750 2 12 0 1350 12 0 FLIGHT LITE peratures Note numbers chart current drawn milliam peres proportional brightness brightness CVI changes 41 across flashing range low level range starts 4 volts irrespective tem perature Some people have expressed concern amount current drawn devices integrate current drawn over discharge time bat tery pack service will see power consumed order 5% available power Most people will stop fly ing 30% 50% battery power still pack just because dont know what have basis de vices extend flying time Thanks Bob Petrinec Power-CYT ex plan ation responses column far would seem want little elec tronic gadgets build simplified ex planations traditional RC techniques like bolt sizes propeller sizes hinging installations etc want something else address George M Myers 70 Froehlich Farm Road Hicksville NY 11801 320750 j350 4045 HDD 00 POWER- CYT FLASHING RANGE NUMBERS IN BOXES ARE MILLIAMPS AND SHOW RELATIVE BRIGHTNESS Man Power/Berliner continued page 14 tandem-wing arrangement re duces critical over-all wingspan slave/pilot combination steadily gaining popularity strangely curled-up wingtips designed control tip vortices may worth trouble build Dimensions Wingspan front wing 65 rear wing 80 length 19 wing area front wing 250 sq ft rear wing 300 sq ft 320 41 30 7 750 42 6 350 43 20 5 O00 CORLEY CVI empty weight 167 lbs flying weight 467 lbs Airfoil both wings Wortman FX-67K-170 Estimated cruising speed 22 mph Goodhart unusual design handiwork Rear Adm Nick Goodhart Royal Navy great men British sailplane move ment idea reduce induced drag much possible developing airplane can flown within 11/2 feet 84 Model Aviation HIGH PERFORMANCE * COMPETITION PROVEN ASK yOUR DEALER TEMPERATURE RESPONSES OF SAMPLE VOLTAGE -INDICATING PILOT LIGHTS QUICKEST MAIL SERVICE ground thus cutting induced drag much 90% make such flight possible Goodhart placed pilot pod either wingtip small canard sur face far out front guide should virtually eliminate tip losses Turns would made banking much guided missile does Dimensions Wingspan 100 length 31 wing area 794 sq ft empty weight under 300 lbs flying weight under 600 lbs Airfoil Wortman FX-63-137 Cruising speed estimated 16-17 mph other projects being actively worked such two-man biplane Massachusetts Institute Technology Its wings folded up wtis ready lift off its first flight however now being re-built Others far along something could pop out wood work moment builders man-powered airplanes often secretive side until theyre ready per form until something quite unexpected happens mighty aeronautical chal lenge will remain untouched Kremer Prize has claimed will stand tribute imagination man As beacon lighting way ward next outlandish goal could flapping-wing flight human flight kind wings Or. age radio compartment 1 wide 5 6 long 2 deep has some challenge hobby right things would like com ment about racing general drifting away scale aspect aircraft original intent NMPRA event emulate full scale racing So far Formula-One has main tained degree FAI 600 sq class has died USA because strange looking non-scale aircraft evolved over years Quarter Midget class has become very popular also partly due fact aircraft must look like full-scale aircraft has raced believe racing would adopt same rule planes should look like full scale aircraft necessarily racing plane least 85% 90% scale outline least watching group planes racing look like real aircraft lot teresting watching bunch square boxes wings spectators enjoy races can identify type aircraft participating races So much soap box month Next month will cover Quickie 500 class racing next step world RC racing Please send questions ideas gripes etc D K Lane 4477 W 136th St Hawthorne Calif 90250 will happy include material re ceived column Keep em flying go fast turn left Littlest Stick Spanning 19-1/2 in. 010 02 power tiny smooth fly ing responsive version Stick Con cept great fun plane may flown schoolyard large back yard Although fast agile skittery little planes means safe control Ace pulse system rudder-only utilizes Baby System Baby actuator Weight 575 oz Price $395 Ace R/C Inc Box 511 Higginsville Mo 64037 April 1976 85 RC Pylon/Lane continued page 19