What could have fastest prop-driven plane worldfasterthan Me-i 09R held record until recentyearsthe C71 4R inspirational sights Musee de lAir near Paris Longer 6 ft 4/a its 22 ft 1/4 span 75 sq feet wing area Caudrons displayed unique cockpit fairing being streamlined less drag bubble permitted minimum depth fuselage itselfthink early Thunderbolt P-47 Jug youll grasp concept 0 Marcel Riffards Text drawing Harry Robinson Spe BY THE late 1930s generally accepted all-metal construction engines 1000 hp essential requirements aircraft expected set new speed records Europe number constructors continued build high-speed machines wood make use relatively low-powered engines England de Havilland engineers repeated success 1934 racing Comet remarkable allwood Albatross airliner successive models Edgar Percivals Mew Gull continued record fastest speed years Kings Cup Race Across Channel Marcel Riffard Technical Director Chief Engineer Avions Caudron continued use wooden construction wide variety racing sport training military aircraft Highly respected France producer virtually unbeatable thoroughbred racing ma chines Riffard already startled American air-racing fraternity sleek midnight-blue Caudron C460 flown such devastating success Michel Detroyat 1936 National Air Races Los Angeles engineer directly responsible bolide bleu Caudrons Chef du Bureau de Prototypes Georges Otfinovsky already established basic features design during Caudron preparation 1933 Coupe Deutsch de Ia Meurthe race Etampes south Paris Four examples muchimproved type C460 constructed 1934 event fitted neatly spatted fixed landing gear redesignated C450 won years Coupe Deutsch race over 2000 km following year problems retractable landing gear now fully resolved C460 won 2759 mph set 1000 km closed course record almost 278 mph another placed second 2636 mph third flown full throttle new 100 km closecourse mark 2916 mph forced retire after seven laps success Detroyat third C460 needs no repetition During 1935/36 French Air Ministry accelerated its active encouragement air craft industry regain France cream worlds aviation records held Italy Germany USA 42 Model Aviation Sardined compact nose inverseg nenauis v-i d Iou-np engine powered earlier fighter boosted put out 900 hpl Basically streamlined engine minimum wings C71 4R scorcher Germans approached Paris 1940 successfully hidden ample cellars Renault factory until Occupation ended has now added permanent display le Bourget Made wood relatively low horsepower engines superlative Caudron racers remain impressive day Among the C460 flown Michael Detroyat dominated own National Air Races 1936 C714R estimated capable 495 mph stymied bythe war wasthoughtto fasterthan 441 mph Macchi-Castoldi MC 72 special Messerschmitt 109R set world record 1939 46922 mph ESTIMATED PERFORMANCE Speed sea level677 km/h 421 mph Speed 5000 m km/h 403 mph 16500ft Speed 10000 m km/h 294 mph 33000ft Climb 1000 m ec 3300ft Climb 5000 m . 56 sec 16500ft Climb 10000 m mm 30 sec 33000 ft Ceiling10500 m 34500 ft Mm speed flaps1 74 km/h 129 mph Mm speed flaps207 km/h 108 mph // ________0 F CAUDRON C712 2nd VERSION APRIL 1937 ciRecordCaudrons landplane speed record returned United States September 1935 Howard Hughes figure of35246 mph Marcel Riffard determined Caudron aircraft should recapture prize France Record attempts C56 1 radically modified development C460 intended originally 1936 Coupe Deutsch race unsuccessful Riffards next thoughts version all-wood C7 10 light fighter prototype stage project received designation C7 11 have retract able landing gear increased power soon abandoned Riffards next step combine fuselage C710 proven Coupe Deutsch type wing retractable undercarriage Design new aircraft carried Out same team under Maurice Devlieger Caudrons Chef du Bureau de Serie already working development C710 fighter composite machine desig nated C712 used wing undercarriage horizontal tail CS 60 aircraft built Coupe Deutsch race 1935 mated fuselage C710 fighterone ofthree built Soviet Russia never delivered Engine power augmented increasing compression ratio small vertical tail specially designed component semi circular outline similar fighters considerably reduced area C712 arrived military airfield Istres some 23 miles west Aix-en-Provence December 22 1936 Takeoff climb handling characteristics excellent ex tensive engine/propeller modifications proved necessary record attempt April 29 1937 revised C712 destroyed control lost following elevator damage caused during takeoff flying stones covered field great profusion Raymond Delmotte Caudrons chief test pilot descended safely parachute Nevertheless C712 amply demon strated practicability C560/C7 10 formula timed speed between 385 390 mph still accelerating mile start 3-km course Only quarter hour after accident Delmotte confidently speaking trying again new aircraft before end May Riffard decided build devel Continued page 119 September 1980 43 frugal looking cockpit thoroughlydetailed drawings also include complete authentic color scheme actual plane thoroughly inspected article out new Quickie see admire something looked little strange see seems Quickie easy build can sleep Apparently thats Ric glued wing because UPSIDE DOWN prettiest flat-topped airfoil have ever seen Another case Houston Super Flier syn drome rearing its ugly head Thats about end stories now except Houston Racer shall remain anonymous flying Slow Combat past weekend Louisiana put drive washer Fox engine backwards Seems hit opponents string stupid thingto Slow Combat string just followed shape washer nice right front bearing packed ball race completely full always thought rough side supposed face thefront Well thats last case Houston Super Racerat least month W R Lee 3522 Tamarisk Lane Missouri City TX 77459 C au d ron/Robinson continued page 43 oped version evidently felicitous marriage between fighter racing machine small design team headed Georges Otfinovsky immediately began work new aircraft Most features new design originated Riffard himself Riffards very considerable experience expertise determined general layout structural innovations new machine Construction began June July 1937 proceeded slowly largely through lack capital also because partial mobilization French manpower during years prior September 1939 over year new aircraft referred Riflard derivative C712 fact first designated C7 1 2R indicate both its function R rd its descent earlier machine However early 1938 become necessary pursuade Armee de lAir value Riffards light fighter developed acceptable prototype designation C714 decided redesignate record aircraft suggest both fightef common type Thus record aircraft proved itself Armee de lAir would expected easily convinced value fighter June 1938 C7 1 2R redesignated C7 14R reality components common both machines basic fuselage truss capacity 19-litre Renault V-12 engine name Caudron However capital completing C7 14R financing attempt record still available unfinished C714R remained its hangar Issy-les-Moulinaux Following order twenty CR714 CI fighters November 1938 Avions Caudron obliged concentrate military production work record aeroplane brought almost standstill June 1938 Ernst Udet flew Heinkel H 100 V2 new 100-km record Ritlard remained confident still incomplete C714R could attack great chance ot success pure speed record 100-km records its own heavier clas sifications Maximum sea-level speed estimated 796 km/h 494 mph higher 440 mph Macchi-Castoldi MC72 46922 mph record set Fritz Wendel so-called Messerschmitt 109R April 1939 Although C714R completed during following summer turmoil Europe time made record attempt impossible Riffards ultimate bolide bleu never flown continued languish Issy until after outbreak hostilities September Apart its use existing basic fuselage structure elements C714R new components designed increased perfor mance new machine fuselage truss taken C710 light fighter prototypes produced Soviet Russia used basis extensively revised fuselage perfect streamline form Four longerons laminated beech joined sloping side panels birch plywood vertical spruce stiffeners cross-braces di agonals Magnesium-alloy panels 125 mm thick carried curved wooden arches above below main truss being split along line lower longeron divided sections number vertical buttjoints Duralumin junction straps carrying shakeproof nuts fixed longerons supporting arches other frames self-tapping screws panels attached special screws suit shakeproof nuts Wing retractable landing gear horizontal tail although virtually identical form C460 C560 Coupe Deutsch aircraft fact fully restressed higher speeds new type Apart slightly rounded tip shape one-piece wing indis tinguishable earlier types same symmetrical airfoil having its maximum thickness 35% chord Incidence zero throughout span horizontal top line dihedral formed considerable taper thickness Two continuous box-spars formed upper flanges laminated limbo type walnut found Cameroun lower flanges laminated spruce vertical webs birch plywood Ribs also birch-ply stressed-skin plywood covering glued rebates spruce leading edge over remainder structure Resin glue fixing medium used throughout light nails visible various places served hold parts under pressure during glueing immense care taken finish wing other components further reason long delay completing C714R After careful sandpapering priming coat three finish coats applied dried 24 hours rubbed down Both priming finish coats completely clear lacquer grain plywoodskin plainly visible Fuselage panels left polished magnesium Riflard claimed definite increase speed superior finish alone Ailerons split landing flaps similarly constructed single box spar birch-ply covering ball-bearing hinges Aileron control ingenious system levers developed Riffard himself housed within thickness wing Only two tiny bulges underside necessary clear ends aileron horns fitted rubber cord shock-damper manually operated flaps fitted rubber cord compensators reduce opening loads could locked closed fully open 45 degrees deflection Messier retractable undercarriage operated double-acting hydraulic jacks hydraulic system powered motordriven pump standby hand-pump additional emergency extension circuit Both main wheels welded steel tailskid controlled single lever indicating lamps show position main leg Material finish tail surfaces identical wing used single box spar spruce leading edges birch plywood covering torque tube leading edges elevators rudder ball bearing hinges flying controls balanced rubber shock cord cable operated via positive mechanical linkage surface parts especially reinforced against repetition damage led destruction C712 pilots cockpit fully enclosed sliding canopy similar famous C460 its vertical frames fixed rear fairing small close-fitting helmet ended abruptly sloping knife-edge refinement cockpit fairing system Riffards first two generations Coupe Deutsch aircraft developed Georges Otfinovsky decrease wetted area reduced drag weight September 1980 119 ZONA SAWS famous line hobby saws Razor #200 $190 $165 #1*345 Replacement blades available dealer F Model Supply PO Box 3957 Toerance CA 90510 USA effectiveness fin increased because additional length its leading edge Entry exit removable door left-hand side windscreen could jettisoned flight both seat rudder pedals adjustable inverted v-i 2 overhead-valve engine special version aircooled supercharged 19-litre Renault 613 produced 900 hp 300 m 1000 ft Basically similar 450-hp Renault 12R-01 powered C714 fighter special engines compression ratio increased 640 725 its manifold pressure 323 496 inches mercury thus boosting nominal rpm 2500 3000 Propeller shaft forward crankcase extended some 10 cm 4 allow superior streamlining nose improved intake engine cooling duct Formed magnesium-alloy panels made up engine cowling Carburetor feed ducted bottom single intake cooling air carefully baffled ensure cooling cylinders discharged beneath fuselage through large louvre flank Steamlined exhausts chrome-molybdenum steel oil cooler almost half large again C712 made up two closespaced skins riveted together fitted underside rear fuselage magnesium fuel tank 206 litres 45 gallons capacity situ ated behind engine firewall 345 litre 76 gallons oil tank fitted behind pilots seat three-bladed Ratier propeller early form constant speed unit already fitted modified C7 12 Blade pitch could varied 300 45 0 controlled reversible electric motor connected throttle control centrifugal regulator altered blade angle opposition changes engine speed NEWIkE FliqilT LiNE Box Perfect competitor Small light yet big enough -12 volt battery power panel starter extra props plugs much Assembled Finished $995 Complete starter panel battery$7185 Also CL specialized accessories Send 254 info ThePO Box 4981 Pike Fiht Lancaster PA 17604 ivX phone 717 29P2136 Exhaustive wind tunnel tests carried out January 1939 Eiffel Laboratory using 1/10th scale models complete aircraft wing alone known performance C460 basis taking account relative propeller efficiencies propeller/aircraft interference cooling drag possible calculate considerable accuracy both level flight climb performance shown table below success denied C714R highly qualified group under Marcel Riffard created protracted delays due manpower shortages military production well great care lavished surface finish engine development help up completion until war Germany inevitable ideas record attempt abandoned C7 14R did fly reach Istres German forces approached Paris June 1940 hidden ample cellars Renault building Champs-Elysees survived occupation undetected Following liberation Paris 1944 C714R displayed aviation exhibition held Velodrome dHiver sports stadium falsely represented product re-emerging French aviation industry Its immaculate clear lacquer covered familiar greyish mid-blue Caudron Coupe Deutsch machines later repainted darker saturated shade resembling midnight blue Detroyats C460 C7 1 4R placed permanent display Musee de lAir Chalais-Meudon remained until recentfy being added present display le Bourget Its rudder still bravely bears blue white red tricolor France legend C7 14R / Avions Caudron Before being displayed Le Bourget during Paris Salon 1971 name RIFFARD added fitting belated tribute genius man drive initiative made name Caudron synonymous speed author gratefully acknowledges patient cooperation Monsieur Georges Otfinovsky well help Conservateur staff Musee de lAir preparing article scale drawing CL Combat/Johnson continued page 41 5% nitro fuel contest management supplied fuel little dye FAI has gained popularity local level using airplane set lines Also adopting least first round losers bracket FAI nice touch dont have time full double elimination system about least first round losers bracket Nats year remember last year against changed minds after first round Right SB Send orders Kustom Kraftsmanship PO Box 2699 Laguna Hills CA 92653 KK pays postage items sent within USA California residents pay additional 6% sales tax Mini mum order $500 Id send catalogs first send self-addressed envelope just cant wait heres some stuff youll need Stock No 102 New TD customized $3550 Stock No 104 New TD larger venturi $3595 Stock No 174 Custom TD Fine thread needle valve assembly $475 Stock No 170 Piston/Rod reset tool $295 Stock No 510 Universal Custom Needle valve $475 fits Rossi Tigre 15 Piston/rod reset tool absolute must youre going run TD very much Complete instructions come handy device Charlie Johnson 3716 Ingraham St San Diego CA 92109 FF Sport/Scale/Warner continued page 49 Xerox copy 1% larger original plan can slice inside black lines no great penalty have sand em off before applying translucent tissue covering Retracting gear rubber jobs has long dream bored-with-it-all modelers Imagine being first kid block pull up wheels takeoff Joe Ott Spitfire Well Nick DeCarlis Gainesville FL has picked up Tomy Mini-Bath-tubbie motor idea kicked around among free fighters lot after FF Liar newsletter suggested its use HLG dethermalizers Nick uses spinning arm little balsa flag end slow down toy motor As unwinds pays out thread holds gear extended position Rubberband tension provides power pull gear up hold tailskid trigger start going via 1/16 sq pushrod Nick reports about 8second retract time should prove really great see test bed Keith Ryder racer gear retracting straight back sim plicity Bostonian West new class planes 16 max span 14 max length 6 max prop dia windows 3 max chord enclosing box 1 x 2 x 3 main characteristic 120 Model Aviation REPUBLIC SEABEE s PRODUCTS 1100 Michigan Box 161 Maryaville MI 48040 Wing Span 70 Complete Hardware Epoxy Glass Retractable Gear 40 Powered Factors
Edition: Model Aviation - 1980/09
Page Numbers: 42, 43, 119, 120
What could have fastest prop-driven plane worldfasterthan Me-i 09R held record until recentyearsthe C71 4R inspirational sights Musee de lAir near Paris Longer 6 ft 4/a its 22 ft 1/4 span 75 sq feet wing area Caudrons displayed unique cockpit fairing being streamlined less drag bubble permitted minimum depth fuselage itselfthink early Thunderbolt P-47 Jug youll grasp concept 0 Marcel Riffards Text drawing Harry Robinson Spe BY THE late 1930s generally accepted all-metal construction engines 1000 hp essential requirements aircraft expected set new speed records Europe number constructors continued build high-speed machines wood make use relatively low-powered engines England de Havilland engineers repeated success 1934 racing Comet remarkable allwood Albatross airliner successive models Edgar Percivals Mew Gull continued record fastest speed years Kings Cup Race Across Channel Marcel Riffard Technical Director Chief Engineer Avions Caudron continued use wooden construction wide variety racing sport training military aircraft Highly respected France producer virtually unbeatable thoroughbred racing ma chines Riffard already startled American air-racing fraternity sleek midnight-blue Caudron C460 flown such devastating success Michel Detroyat 1936 National Air Races Los Angeles engineer directly responsible bolide bleu Caudrons Chef du Bureau de Prototypes Georges Otfinovsky already established basic features design during Caudron preparation 1933 Coupe Deutsch de Ia Meurthe race Etampes south Paris Four examples muchimproved type C460 constructed 1934 event fitted neatly spatted fixed landing gear redesignated C450 won years Coupe Deutsch race over 2000 km following year problems retractable landing gear now fully resolved C460 won 2759 mph set 1000 km closed course record almost 278 mph another placed second 2636 mph third flown full throttle new 100 km closecourse mark 2916 mph forced retire after seven laps success Detroyat third C460 needs no repetition During 1935/36 French Air Ministry accelerated its active encouragement air craft industry regain France cream worlds aviation records held Italy Germany USA 42 Model Aviation Sardined compact nose inverseg nenauis v-i d Iou-np engine powered earlier fighter boosted put out 900 hpl Basically streamlined engine minimum wings C71 4R scorcher Germans approached Paris 1940 successfully hidden ample cellars Renault factory until Occupation ended has now added permanent display le Bourget Made wood relatively low horsepower engines superlative Caudron racers remain impressive day Among the C460 flown Michael Detroyat dominated own National Air Races 1936 C714R estimated capable 495 mph stymied bythe war wasthoughtto fasterthan 441 mph Macchi-Castoldi MC 72 special Messerschmitt 109R set world record 1939 46922 mph ESTIMATED PERFORMANCE Speed sea level677 km/h 421 mph Speed 5000 m km/h 403 mph 16500ft Speed 10000 m km/h 294 mph 33000ft Climb 1000 m ec 3300ft Climb 5000 m . 56 sec 16500ft Climb 10000 m mm 30 sec 33000 ft Ceiling10500 m 34500 ft Mm speed flaps1 74 km/h 129 mph Mm speed flaps207 km/h 108 mph // ________0 F CAUDRON C712 2nd VERSION APRIL 1937 ciRecordCaudrons landplane speed record returned United States September 1935 Howard Hughes figure of35246 mph Marcel Riffard determined Caudron aircraft should recapture prize France Record attempts C56 1 radically modified development C460 intended originally 1936 Coupe Deutsch race unsuccessful Riffards next thoughts version all-wood C7 10 light fighter prototype stage project received designation C7 11 have retract able landing gear increased power soon abandoned Riffards next step combine fuselage C710 proven Coupe Deutsch type wing retractable undercarriage Design new aircraft carried Out same team under Maurice Devlieger Caudrons Chef du Bureau de Serie already working development C710 fighter composite machine desig nated C712 used wing undercarriage horizontal tail CS 60 aircraft built Coupe Deutsch race 1935 mated fuselage C710 fighterone ofthree built Soviet Russia never delivered Engine power augmented increasing compression ratio small vertical tail specially designed component semi circular outline similar fighters considerably reduced area C712 arrived military airfield Istres some 23 miles west Aix-en-Provence December 22 1936 Takeoff climb handling characteristics excellent ex tensive engine/propeller modifications proved necessary record attempt April 29 1937 revised C712 destroyed control lost following elevator damage caused during takeoff flying stones covered field great profusion Raymond Delmotte Caudrons chief test pilot descended safely parachute Nevertheless C712 amply demon strated practicability C560/C7 10 formula timed speed between 385 390 mph still accelerating mile start 3-km course Only quarter hour after accident Delmotte confidently speaking trying again new aircraft before end May Riffard decided build devel Continued page 119 September 1980 43 frugal looking cockpit thoroughlydetailed drawings also include complete authentic color scheme actual plane thoroughly inspected article out new Quickie see admire something looked little strange see seems Quickie easy build can sleep Apparently thats Ric glued wing because UPSIDE DOWN prettiest flat-topped airfoil have ever seen Another case Houston Super Flier syn drome rearing its ugly head Thats about end stories now except Houston Racer shall remain anonymous flying Slow Combat past weekend Louisiana put drive washer Fox engine backwards Seems hit opponents string stupid thingto Slow Combat string just followed shape washer nice right front bearing packed ball race completely full always thought rough side supposed face thefront Well thats last case Houston Super Racerat least month W R Lee 3522 Tamarisk Lane Missouri City TX 77459 C au d ron/Robinson continued page 43 oped version evidently felicitous marriage between fighter racing machine small design team headed Georges Otfinovsky immediately began work new aircraft Most features new design originated Riffard himself Riffards very considerable experience expertise determined general layout structural innovations new machine Construction began June July 1937 proceeded slowly largely through lack capital also because partial mobilization French manpower during years prior September 1939 over year new aircraft referred Riflard derivative C712 fact first designated C7 1 2R indicate both its function R rd its descent earlier machine However early 1938 become necessary pursuade Armee de lAir value Riffards light fighter developed acceptable prototype designation C714 decided redesignate record aircraft suggest both fightef common type Thus record aircraft proved itself Armee de lAir would expected easily convinced value fighter June 1938 C7 1 2R redesignated C7 14R reality components common both machines basic fuselage truss capacity 19-litre Renault V-12 engine name Caudron However capital completing C7 14R financing attempt record still available unfinished C714R remained its hangar Issy-les-Moulinaux Following order twenty CR714 CI fighters November 1938 Avions Caudron obliged concentrate military production work record aeroplane brought almost standstill June 1938 Ernst Udet flew Heinkel H 100 V2 new 100-km record Ritlard remained confident still incomplete C714R could attack great chance ot success pure speed record 100-km records its own heavier clas sifications Maximum sea-level speed estimated 796 km/h 494 mph higher 440 mph Macchi-Castoldi MC72 46922 mph record set Fritz Wendel so-called Messerschmitt 109R April 1939 Although C714R completed during following summer turmoil Europe time made record attempt impossible Riffards ultimate bolide bleu never flown continued languish Issy until after outbreak hostilities September Apart its use existing basic fuselage structure elements C714R new components designed increased perfor mance new machine fuselage truss taken C710 light fighter prototypes produced Soviet Russia used basis extensively revised fuselage perfect streamline form Four longerons laminated beech joined sloping side panels birch plywood vertical spruce stiffeners cross-braces di agonals Magnesium-alloy panels 125 mm thick carried curved wooden arches above below main truss being split along line lower longeron divided sections number vertical buttjoints Duralumin junction straps carrying shakeproof nuts fixed longerons supporting arches other frames self-tapping screws panels attached special screws suit shakeproof nuts Wing retractable landing gear horizontal tail although virtually identical form C460 C560 Coupe Deutsch aircraft fact fully restressed higher speeds new type Apart slightly rounded tip shape one-piece wing indis tinguishable earlier types same symmetrical airfoil having its maximum thickness 35% chord Incidence zero throughout span horizontal top line dihedral formed considerable taper thickness Two continuous box-spars formed upper flanges laminated limbo type walnut found Cameroun lower flanges laminated spruce vertical webs birch plywood Ribs also birch-ply stressed-skin plywood covering glued rebates spruce leading edge over remainder structure Resin glue fixing medium used throughout light nails visible various places served hold parts under pressure during glueing immense care taken finish wing other components further reason long delay completing C714R After careful sandpapering priming coat three finish coats applied dried 24 hours rubbed down Both priming finish coats completely clear lacquer grain plywoodskin plainly visible Fuselage panels left polished magnesium Riflard claimed definite increase speed superior finish alone Ailerons split landing flaps similarly constructed single box spar birch-ply covering ball-bearing hinges Aileron control ingenious system levers developed Riffard himself housed within thickness wing Only two tiny bulges underside necessary clear ends aileron horns fitted rubber cord shock-damper manually operated flaps fitted rubber cord compensators reduce opening loads could locked closed fully open 45 degrees deflection Messier retractable undercarriage operated double-acting hydraulic jacks hydraulic system powered motordriven pump standby hand-pump additional emergency extension circuit Both main wheels welded steel tailskid controlled single lever indicating lamps show position main leg Material finish tail surfaces identical wing used single box spar spruce leading edges birch plywood covering torque tube leading edges elevators rudder ball bearing hinges flying controls balanced rubber shock cord cable operated via positive mechanical linkage surface parts especially reinforced against repetition damage led destruction C712 pilots cockpit fully enclosed sliding canopy similar famous C460 its vertical frames fixed rear fairing small close-fitting helmet ended abruptly sloping knife-edge refinement cockpit fairing system Riffards first two generations Coupe Deutsch aircraft developed Georges Otfinovsky decrease wetted area reduced drag weight September 1980 119 ZONA SAWS famous line hobby saws Razor #200 $190 $165 #1*345 Replacement blades available dealer F Model Supply PO Box 3957 Toerance CA 90510 USA effectiveness fin increased because additional length its leading edge Entry exit removable door left-hand side windscreen could jettisoned flight both seat rudder pedals adjustable inverted v-i 2 overhead-valve engine special version aircooled supercharged 19-litre Renault 613 produced 900 hp 300 m 1000 ft Basically similar 450-hp Renault 12R-01 powered C714 fighter special engines compression ratio increased 640 725 its manifold pressure 323 496 inches mercury thus boosting nominal rpm 2500 3000 Propeller shaft forward crankcase extended some 10 cm 4 allow superior streamlining nose improved intake engine cooling duct Formed magnesium-alloy panels made up engine cowling Carburetor feed ducted bottom single intake cooling air carefully baffled ensure cooling cylinders discharged beneath fuselage through large louvre flank Steamlined exhausts chrome-molybdenum steel oil cooler almost half large again C712 made up two closespaced skins riveted together fitted underside rear fuselage magnesium fuel tank 206 litres 45 gallons capacity situ ated behind engine firewall 345 litre 76 gallons oil tank fitted behind pilots seat three-bladed Ratier propeller early form constant speed unit already fitted modified C7 12 Blade pitch could varied 300 45 0 controlled reversible electric motor connected throttle control centrifugal regulator altered blade angle opposition changes engine speed NEWIkE FliqilT LiNE Box Perfect competitor Small light yet big enough -12 volt battery power panel starter extra props plugs much Assembled Finished $995 Complete starter panel battery$7185 Also CL specialized accessories Send 254 info ThePO Box 4981 Pike Fiht Lancaster PA 17604 ivX phone 717 29P2136 Exhaustive wind tunnel tests carried out January 1939 Eiffel Laboratory using 1/10th scale models complete aircraft wing alone known performance C460 basis taking account relative propeller efficiencies propeller/aircraft interference cooling drag possible calculate considerable accuracy both level flight climb performance shown table below success denied C714R highly qualified group under Marcel Riffard created protracted delays due manpower shortages military production well great care lavished surface finish engine development help up completion until war Germany inevitable ideas record attempt abandoned C7 14R did fly reach Istres German forces approached Paris June 1940 hidden ample cellars Renault building Champs-Elysees survived occupation undetected Following liberation Paris 1944 C714R displayed aviation exhibition held Velodrome dHiver sports stadium falsely represented product re-emerging French aviation industry Its immaculate clear lacquer covered familiar greyish mid-blue Caudron Coupe Deutsch machines later repainted darker saturated shade resembling midnight blue Detroyats C460 C7 1 4R placed permanent display Musee de lAir Chalais-Meudon remained until recentfy being added present display le Bourget Its rudder still bravely bears blue white red tricolor France legend C7 14R / Avions Caudron Before being displayed Le Bourget during Paris Salon 1971 name RIFFARD added fitting belated tribute genius man drive initiative made name Caudron synonymous speed author gratefully acknowledges patient cooperation Monsieur Georges Otfinovsky well help Conservateur staff Musee de lAir preparing article scale drawing CL Combat/Johnson continued page 41 5% nitro fuel contest management supplied fuel little dye FAI has gained popularity local level using airplane set lines Also adopting least first round losers bracket FAI nice touch dont have time full double elimination system about least first round losers bracket Nats year remember last year against changed minds after first round Right SB Send orders Kustom Kraftsmanship PO Box 2699 Laguna Hills CA 92653 KK pays postage items sent within USA California residents pay additional 6% sales tax Mini mum order $500 Id send catalogs first send self-addressed envelope just cant wait heres some stuff youll need Stock No 102 New TD customized $3550 Stock No 104 New TD larger venturi $3595 Stock No 174 Custom TD Fine thread needle valve assembly $475 Stock No 170 Piston/Rod reset tool $295 Stock No 510 Universal Custom Needle valve $475 fits Rossi Tigre 15 Piston/rod reset tool absolute must youre going run TD very much Complete instructions come handy device Charlie Johnson 3716 Ingraham St San Diego CA 92109 FF Sport/Scale/Warner continued page 49 Xerox copy 1% larger original plan can slice inside black lines no great penalty have sand em off before applying translucent tissue covering Retracting gear rubber jobs has long dream bored-with-it-all modelers Imagine being first kid block pull up wheels takeoff Joe Ott Spitfire Well Nick DeCarlis Gainesville FL has picked up Tomy Mini-Bath-tubbie motor idea kicked around among free fighters lot after FF Liar newsletter suggested its use HLG dethermalizers Nick uses spinning arm little balsa flag end slow down toy motor As unwinds pays out thread holds gear extended position Rubberband tension provides power pull gear up hold tailskid trigger start going via 1/16 sq pushrod Nick reports about 8second retract time should prove really great see test bed Keith Ryder racer gear retracting straight back sim plicity Bostonian West new class planes 16 max span 14 max length 6 max prop dia windows 3 max chord enclosing box 1 x 2 x 3 main characteristic 120 Model Aviation REPUBLIC SEABEE s PRODUCTS 1100 Michigan Box 161 Maryaville MI 48040 Wing Span 70 Complete Hardware Epoxy Glass Retractable Gear 40 Powered Factors
Edition: Model Aviation - 1980/09
Page Numbers: 42, 43, 119, 120
What could have fastest prop-driven plane worldfasterthan Me-i 09R held record until recentyearsthe C71 4R inspirational sights Musee de lAir near Paris Longer 6 ft 4/a its 22 ft 1/4 span 75 sq feet wing area Caudrons displayed unique cockpit fairing being streamlined less drag bubble permitted minimum depth fuselage itselfthink early Thunderbolt P-47 Jug youll grasp concept 0 Marcel Riffards Text drawing Harry Robinson Spe BY THE late 1930s generally accepted all-metal construction engines 1000 hp essential requirements aircraft expected set new speed records Europe number constructors continued build high-speed machines wood make use relatively low-powered engines England de Havilland engineers repeated success 1934 racing Comet remarkable allwood Albatross airliner successive models Edgar Percivals Mew Gull continued record fastest speed years Kings Cup Race Across Channel Marcel Riffard Technical Director Chief Engineer Avions Caudron continued use wooden construction wide variety racing sport training military aircraft Highly respected France producer virtually unbeatable thoroughbred racing ma chines Riffard already startled American air-racing fraternity sleek midnight-blue Caudron C460 flown such devastating success Michel Detroyat 1936 National Air Races Los Angeles engineer directly responsible bolide bleu Caudrons Chef du Bureau de Prototypes Georges Otfinovsky already established basic features design during Caudron preparation 1933 Coupe Deutsch de Ia Meurthe race Etampes south Paris Four examples muchimproved type C460 constructed 1934 event fitted neatly spatted fixed landing gear redesignated C450 won years Coupe Deutsch race over 2000 km following year problems retractable landing gear now fully resolved C460 won 2759 mph set 1000 km closed course record almost 278 mph another placed second 2636 mph third flown full throttle new 100 km closecourse mark 2916 mph forced retire after seven laps success Detroyat third C460 needs no repetition During 1935/36 French Air Ministry accelerated its active encouragement air craft industry regain France cream worlds aviation records held Italy Germany USA 42 Model Aviation Sardined compact nose inverseg nenauis v-i d Iou-np engine powered earlier fighter boosted put out 900 hpl Basically streamlined engine minimum wings C71 4R scorcher Germans approached Paris 1940 successfully hidden ample cellars Renault factory until Occupation ended has now added permanent display le Bourget Made wood relatively low horsepower engines superlative Caudron racers remain impressive day Among the C460 flown Michael Detroyat dominated own National Air Races 1936 C714R estimated capable 495 mph stymied bythe war wasthoughtto fasterthan 441 mph Macchi-Castoldi MC 72 special Messerschmitt 109R set world record 1939 46922 mph ESTIMATED PERFORMANCE Speed sea level677 km/h 421 mph Speed 5000 m km/h 403 mph 16500ft Speed 10000 m km/h 294 mph 33000ft Climb 1000 m ec 3300ft Climb 5000 m . 56 sec 16500ft Climb 10000 m mm 30 sec 33000 ft Ceiling10500 m 34500 ft Mm speed flaps1 74 km/h 129 mph Mm speed flaps207 km/h 108 mph // ________0 F CAUDRON C712 2nd VERSION APRIL 1937 ciRecordCaudrons landplane speed record returned United States September 1935 Howard Hughes figure of35246 mph Marcel Riffard determined Caudron aircraft should recapture prize France Record attempts C56 1 radically modified development C460 intended originally 1936 Coupe Deutsch race unsuccessful Riffards next thoughts version all-wood C7 10 light fighter prototype stage project received designation C7 11 have retract able landing gear increased power soon abandoned Riffards next step combine fuselage C710 proven Coupe Deutsch type wing retractable undercarriage Design new aircraft carried Out same team under Maurice Devlieger Caudrons Chef du Bureau de Serie already working development C710 fighter composite machine desig nated C712 used wing undercarriage horizontal tail CS 60 aircraft built Coupe Deutsch race 1935 mated fuselage C710 fighterone ofthree built Soviet Russia never delivered Engine power augmented increasing compression ratio small vertical tail specially designed component semi circular outline similar fighters considerably reduced area C712 arrived military airfield Istres some 23 miles west Aix-en-Provence December 22 1936 Takeoff climb handling characteristics excellent ex tensive engine/propeller modifications proved necessary record attempt April 29 1937 revised C712 destroyed control lost following elevator damage caused during takeoff flying stones covered field great profusion Raymond Delmotte Caudrons chief test pilot descended safely parachute Nevertheless C712 amply demon strated practicability C560/C7 10 formula timed speed between 385 390 mph still accelerating mile start 3-km course Only quarter hour after accident Delmotte confidently speaking trying again new aircraft before end May Riffard decided build devel Continued page 119 September 1980 43 frugal looking cockpit thoroughlydetailed drawings also include complete authentic color scheme actual plane thoroughly inspected article out new Quickie see admire something looked little strange see seems Quickie easy build can sleep Apparently thats Ric glued wing because UPSIDE DOWN prettiest flat-topped airfoil have ever seen Another case Houston Super Flier syn drome rearing its ugly head Thats about end stories now except Houston Racer shall remain anonymous flying Slow Combat past weekend Louisiana put drive washer Fox engine backwards Seems hit opponents string stupid thingto Slow Combat string just followed shape washer nice right front bearing packed ball race completely full always thought rough side supposed face thefront Well thats last case Houston Super Racerat least month W R Lee 3522 Tamarisk Lane Missouri City TX 77459 C au d ron/Robinson continued page 43 oped version evidently felicitous marriage between fighter racing machine small design team headed Georges Otfinovsky immediately began work new aircraft Most features new design originated Riffard himself Riffards very considerable experience expertise determined general layout structural innovations new machine Construction began June July 1937 proceeded slowly largely through lack capital also because partial mobilization French manpower during years prior September 1939 over year new aircraft referred Riflard derivative C712 fact first designated C7 1 2R indicate both its function R rd its descent earlier machine However early 1938 become necessary pursuade Armee de lAir value Riffards light fighter developed acceptable prototype designation C714 decided redesignate record aircraft suggest both fightef common type Thus record aircraft proved itself Armee de lAir would expected easily convinced value fighter June 1938 C7 1 2R redesignated C7 14R reality components common both machines basic fuselage truss capacity 19-litre Renault V-12 engine name Caudron However capital completing C7 14R financing attempt record still available unfinished C714R remained its hangar Issy-les-Moulinaux Following order twenty CR714 CI fighters November 1938 Avions Caudron obliged concentrate military production work record aeroplane brought almost standstill June 1938 Ernst Udet flew Heinkel H 100 V2 new 100-km record Ritlard remained confident still incomplete C714R could attack great chance ot success pure speed record 100-km records its own heavier clas sifications Maximum sea-level speed estimated 796 km/h 494 mph higher 440 mph Macchi-Castoldi MC72 46922 mph record set Fritz Wendel so-called Messerschmitt 109R April 1939 Although C714R completed during following summer turmoil Europe time made record attempt impossible Riffards ultimate bolide bleu never flown continued languish Issy until after outbreak hostilities September Apart its use existing basic fuselage structure elements C714R new components designed increased perfor mance new machine fuselage truss taken C710 light fighter prototypes produced Soviet Russia used basis extensively revised fuselage perfect streamline form Four longerons laminated beech joined sloping side panels birch plywood vertical spruce stiffeners cross-braces di agonals Magnesium-alloy panels 125 mm thick carried curved wooden arches above below main truss being split along line lower longeron divided sections number vertical buttjoints Duralumin junction straps carrying shakeproof nuts fixed longerons supporting arches other frames self-tapping screws panels attached special screws suit shakeproof nuts Wing retractable landing gear horizontal tail although virtually identical form C460 C560 Coupe Deutsch aircraft fact fully restressed higher speeds new type Apart slightly rounded tip shape one-piece wing indis tinguishable earlier types same symmetrical airfoil having its maximum thickness 35% chord Incidence zero throughout span horizontal top line dihedral formed considerable taper thickness Two continuous box-spars formed upper flanges laminated limbo type walnut found Cameroun lower flanges laminated spruce vertical webs birch plywood Ribs also birch-ply stressed-skin plywood covering glued rebates spruce leading edge over remainder structure Resin glue fixing medium used throughout light nails visible various places served hold parts under pressure during glueing immense care taken finish wing other components further reason long delay completing C714R After careful sandpapering priming coat three finish coats applied dried 24 hours rubbed down Both priming finish coats completely clear lacquer grain plywoodskin plainly visible Fuselage panels left polished magnesium Riflard claimed definite increase speed superior finish alone Ailerons split landing flaps similarly constructed single box spar birch-ply covering ball-bearing hinges Aileron control ingenious system levers developed Riffard himself housed within thickness wing Only two tiny bulges underside necessary clear ends aileron horns fitted rubber cord shock-damper manually operated flaps fitted rubber cord compensators reduce opening loads could locked closed fully open 45 degrees deflection Messier retractable undercarriage operated double-acting hydraulic jacks hydraulic system powered motordriven pump standby hand-pump additional emergency extension circuit Both main wheels welded steel tailskid controlled single lever indicating lamps show position main leg Material finish tail surfaces identical wing used single box spar spruce leading edges birch plywood covering torque tube leading edges elevators rudder ball bearing hinges flying controls balanced rubber shock cord cable operated via positive mechanical linkage surface parts especially reinforced against repetition damage led destruction C712 pilots cockpit fully enclosed sliding canopy similar famous C460 its vertical frames fixed rear fairing small close-fitting helmet ended abruptly sloping knife-edge refinement cockpit fairing system Riffards first two generations Coupe Deutsch aircraft developed Georges Otfinovsky decrease wetted area reduced drag weight September 1980 119 ZONA SAWS famous line hobby saws Razor #200 $190 $165 #1*345 Replacement blades available dealer F Model Supply PO Box 3957 Toerance CA 90510 USA effectiveness fin increased because additional length its leading edge Entry exit removable door left-hand side windscreen could jettisoned flight both seat rudder pedals adjustable inverted v-i 2 overhead-valve engine special version aircooled supercharged 19-litre Renault 613 produced 900 hp 300 m 1000 ft Basically similar 450-hp Renault 12R-01 powered C714 fighter special engines compression ratio increased 640 725 its manifold pressure 323 496 inches mercury thus boosting nominal rpm 2500 3000 Propeller shaft forward crankcase extended some 10 cm 4 allow superior streamlining nose improved intake engine cooling duct Formed magnesium-alloy panels made up engine cowling Carburetor feed ducted bottom single intake cooling air carefully baffled ensure cooling cylinders discharged beneath fuselage through large louvre flank Steamlined exhausts chrome-molybdenum steel oil cooler almost half large again C712 made up two closespaced skins riveted together fitted underside rear fuselage magnesium fuel tank 206 litres 45 gallons capacity situ ated behind engine firewall 345 litre 76 gallons oil tank fitted behind pilots seat three-bladed Ratier propeller early form constant speed unit already fitted modified C7 12 Blade pitch could varied 300 45 0 controlled reversible electric motor connected throttle control centrifugal regulator altered blade angle opposition changes engine speed NEWIkE FliqilT LiNE Box Perfect competitor Small light yet big enough -12 volt battery power panel starter extra props plugs much Assembled Finished $995 Complete starter panel battery$7185 Also CL specialized accessories Send 254 info ThePO Box 4981 Pike Fiht Lancaster PA 17604 ivX phone 717 29P2136 Exhaustive wind tunnel tests carried out January 1939 Eiffel Laboratory using 1/10th scale models complete aircraft wing alone known performance C460 basis taking account relative propeller efficiencies propeller/aircraft interference cooling drag possible calculate considerable accuracy both level flight climb performance shown table below success denied C714R highly qualified group under Marcel Riffard created protracted delays due manpower shortages military production well great care lavished surface finish engine development help up completion until war Germany inevitable ideas record attempt abandoned C7 14R did fly reach Istres German forces approached Paris June 1940 hidden ample cellars Renault building Champs-Elysees survived occupation undetected Following liberation Paris 1944 C714R displayed aviation exhibition held Velodrome dHiver sports stadium falsely represented product re-emerging French aviation industry Its immaculate clear lacquer covered familiar greyish mid-blue Caudron Coupe Deutsch machines later repainted darker saturated shade resembling midnight blue Detroyats C460 C7 1 4R placed permanent display Musee de lAir Chalais-Meudon remained until recentfy being added present display le Bourget Its rudder still bravely bears blue white red tricolor France legend C7 14R / Avions Caudron Before being displayed Le Bourget during Paris Salon 1971 name RIFFARD added fitting belated tribute genius man drive initiative made name Caudron synonymous speed author gratefully acknowledges patient cooperation Monsieur Georges Otfinovsky well help Conservateur staff Musee de lAir preparing article scale drawing CL Combat/Johnson continued page 41 5% nitro fuel contest management supplied fuel little dye FAI has gained popularity local level using airplane set lines Also adopting least first round losers bracket FAI nice touch dont have time full double elimination system about least first round losers bracket Nats year remember last year against changed minds after first round Right SB Send orders Kustom Kraftsmanship PO Box 2699 Laguna Hills CA 92653 KK pays postage items sent within USA California residents pay additional 6% sales tax Mini mum order $500 Id send catalogs first send self-addressed envelope just cant wait heres some stuff youll need Stock No 102 New TD customized $3550 Stock No 104 New TD larger venturi $3595 Stock No 174 Custom TD Fine thread needle valve assembly $475 Stock No 170 Piston/Rod reset tool $295 Stock No 510 Universal Custom Needle valve $475 fits Rossi Tigre 15 Piston/rod reset tool absolute must youre going run TD very much Complete instructions come handy device Charlie Johnson 3716 Ingraham St San Diego CA 92109 FF Sport/Scale/Warner continued page 49 Xerox copy 1% larger original plan can slice inside black lines no great penalty have sand em off before applying translucent tissue covering Retracting gear rubber jobs has long dream bored-with-it-all modelers Imagine being first kid block pull up wheels takeoff Joe Ott Spitfire Well Nick DeCarlis Gainesville FL has picked up Tomy Mini-Bath-tubbie motor idea kicked around among free fighters lot after FF Liar newsletter suggested its use HLG dethermalizers Nick uses spinning arm little balsa flag end slow down toy motor As unwinds pays out thread holds gear extended position Rubberband tension provides power pull gear up hold tailskid trigger start going via 1/16 sq pushrod Nick reports about 8second retract time should prove really great see test bed Keith Ryder racer gear retracting straight back sim plicity Bostonian West new class planes 16 max span 14 max length 6 max prop dia windows 3 max chord enclosing box 1 x 2 x 3 main characteristic 120 Model Aviation REPUBLIC SEABEE s PRODUCTS 1100 Michigan Box 161 Maryaville MI 48040 Wing Span 70 Complete Hardware Epoxy Glass Retractable Gear 40 Powered Factors
Edition: Model Aviation - 1980/09
Page Numbers: 42, 43, 119, 120
What could have fastest prop-driven plane worldfasterthan Me-i 09R held record until recentyearsthe C71 4R inspirational sights Musee de lAir near Paris Longer 6 ft 4/a its 22 ft 1/4 span 75 sq feet wing area Caudrons displayed unique cockpit fairing being streamlined less drag bubble permitted minimum depth fuselage itselfthink early Thunderbolt P-47 Jug youll grasp concept 0 Marcel Riffards Text drawing Harry Robinson Spe BY THE late 1930s generally accepted all-metal construction engines 1000 hp essential requirements aircraft expected set new speed records Europe number constructors continued build high-speed machines wood make use relatively low-powered engines England de Havilland engineers repeated success 1934 racing Comet remarkable allwood Albatross airliner successive models Edgar Percivals Mew Gull continued record fastest speed years Kings Cup Race Across Channel Marcel Riffard Technical Director Chief Engineer Avions Caudron continued use wooden construction wide variety racing sport training military aircraft Highly respected France producer virtually unbeatable thoroughbred racing ma chines Riffard already startled American air-racing fraternity sleek midnight-blue Caudron C460 flown such devastating success Michel Detroyat 1936 National Air Races Los Angeles engineer directly responsible bolide bleu Caudrons Chef du Bureau de Prototypes Georges Otfinovsky already established basic features design during Caudron preparation 1933 Coupe Deutsch de Ia Meurthe race Etampes south Paris Four examples muchimproved type C460 constructed 1934 event fitted neatly spatted fixed landing gear redesignated C450 won years Coupe Deutsch race over 2000 km following year problems retractable landing gear now fully resolved C460 won 2759 mph set 1000 km closed course record almost 278 mph another placed second 2636 mph third flown full throttle new 100 km closecourse mark 2916 mph forced retire after seven laps success Detroyat third C460 needs no repetition During 1935/36 French Air Ministry accelerated its active encouragement air craft industry regain France cream worlds aviation records held Italy Germany USA 42 Model Aviation Sardined compact nose inverseg nenauis v-i d Iou-np engine powered earlier fighter boosted put out 900 hpl Basically streamlined engine minimum wings C71 4R scorcher Germans approached Paris 1940 successfully hidden ample cellars Renault factory until Occupation ended has now added permanent display le Bourget Made wood relatively low horsepower engines superlative Caudron racers remain impressive day Among the C460 flown Michael Detroyat dominated own National Air Races 1936 C714R estimated capable 495 mph stymied bythe war wasthoughtto fasterthan 441 mph Macchi-Castoldi MC 72 special Messerschmitt 109R set world record 1939 46922 mph ESTIMATED PERFORMANCE Speed sea level677 km/h 421 mph Speed 5000 m km/h 403 mph 16500ft Speed 10000 m km/h 294 mph 33000ft Climb 1000 m ec 3300ft Climb 5000 m . 56 sec 16500ft Climb 10000 m mm 30 sec 33000 ft Ceiling10500 m 34500 ft Mm speed flaps1 74 km/h 129 mph Mm speed flaps207 km/h 108 mph // ________0 F CAUDRON C712 2nd VERSION APRIL 1937 ciRecordCaudrons landplane speed record returned United States September 1935 Howard Hughes figure of35246 mph Marcel Riffard determined Caudron aircraft should recapture prize France Record attempts C56 1 radically modified development C460 intended originally 1936 Coupe Deutsch race unsuccessful Riffards next thoughts version all-wood C7 10 light fighter prototype stage project received designation C7 11 have retract able landing gear increased power soon abandoned Riffards next step combine fuselage C710 proven Coupe Deutsch type wing retractable undercarriage Design new aircraft carried Out same team under Maurice Devlieger Caudrons Chef du Bureau de Serie already working development C710 fighter composite machine desig nated C712 used wing undercarriage horizontal tail CS 60 aircraft built Coupe Deutsch race 1935 mated fuselage C710 fighterone ofthree built Soviet Russia never delivered Engine power augmented increasing compression ratio small vertical tail specially designed component semi circular outline similar fighters considerably reduced area C712 arrived military airfield Istres some 23 miles west Aix-en-Provence December 22 1936 Takeoff climb handling characteristics excellent ex tensive engine/propeller modifications proved necessary record attempt April 29 1937 revised C712 destroyed control lost following elevator damage caused during takeoff flying stones covered field great profusion Raymond Delmotte Caudrons chief test pilot descended safely parachute Nevertheless C712 amply demon strated practicability C560/C7 10 formula timed speed between 385 390 mph still accelerating mile start 3-km course Only quarter hour after accident Delmotte confidently speaking trying again new aircraft before end May Riffard decided build devel Continued page 119 September 1980 43 frugal looking cockpit thoroughlydetailed drawings also include complete authentic color scheme actual plane thoroughly inspected article out new Quickie see admire something looked little strange see seems Quickie easy build can sleep Apparently thats Ric glued wing because UPSIDE DOWN prettiest flat-topped airfoil have ever seen Another case Houston Super Flier syn drome rearing its ugly head Thats about end stories now except Houston Racer shall remain anonymous flying Slow Combat past weekend Louisiana put drive washer Fox engine backwards Seems hit opponents string stupid thingto Slow Combat string just followed shape washer nice right front bearing packed ball race completely full always thought rough side supposed face thefront Well thats last case Houston Super Racerat least month W R Lee 3522 Tamarisk Lane Missouri City TX 77459 C au d ron/Robinson continued page 43 oped version evidently felicitous marriage between fighter racing machine small design team headed Georges Otfinovsky immediately began work new aircraft Most features new design originated Riffard himself Riffards very considerable experience expertise determined general layout structural innovations new machine Construction began June July 1937 proceeded slowly largely through lack capital also because partial mobilization French manpower during years prior September 1939 over year new aircraft referred Riflard derivative C712 fact first designated C7 1 2R indicate both its function R rd its descent earlier machine However early 1938 become necessary pursuade Armee de lAir value Riffards light fighter developed acceptable prototype designation C714 decided redesignate record aircraft suggest both fightef common type Thus record aircraft proved itself Armee de lAir would expected easily convinced value fighter June 1938 C7 1 2R redesignated C7 14R reality components common both machines basic fuselage truss capacity 19-litre Renault V-12 engine name Caudron However capital completing C7 14R financing attempt record still available unfinished C714R remained its hangar Issy-les-Moulinaux Following order twenty CR714 CI fighters November 1938 Avions Caudron obliged concentrate military production work record aeroplane brought almost standstill June 1938 Ernst Udet flew Heinkel H 100 V2 new 100-km record Ritlard remained confident still incomplete C714R could attack great chance ot success pure speed record 100-km records its own heavier clas sifications Maximum sea-level speed estimated 796 km/h 494 mph higher 440 mph Macchi-Castoldi MC72 46922 mph record set Fritz Wendel so-called Messerschmitt 109R April 1939 Although C714R completed during following summer turmoil Europe time made record attempt impossible Riffards ultimate bolide bleu never flown continued languish Issy until after outbreak hostilities September Apart its use existing basic fuselage structure elements C714R new components designed increased perfor mance new machine fuselage truss taken C710 light fighter prototypes produced Soviet Russia used basis extensively revised fuselage perfect streamline form Four longerons laminated beech joined sloping side panels birch plywood vertical spruce stiffeners cross-braces di agonals Magnesium-alloy panels 125 mm thick carried curved wooden arches above below main truss being split along line lower longeron divided sections number vertical buttjoints Duralumin junction straps carrying shakeproof nuts fixed longerons supporting arches other frames self-tapping screws panels attached special screws suit shakeproof nuts Wing retractable landing gear horizontal tail although virtually identical form C460 C560 Coupe Deutsch aircraft fact fully restressed higher speeds new type Apart slightly rounded tip shape one-piece wing indis tinguishable earlier types same symmetrical airfoil having its maximum thickness 35% chord Incidence zero throughout span horizontal top line dihedral formed considerable taper thickness Two continuous box-spars formed upper flanges laminated limbo type walnut found Cameroun lower flanges laminated spruce vertical webs birch plywood Ribs also birch-ply stressed-skin plywood covering glued rebates spruce leading edge over remainder structure Resin glue fixing medium used throughout light nails visible various places served hold parts under pressure during glueing immense care taken finish wing other components further reason long delay completing C714R After careful sandpapering priming coat three finish coats applied dried 24 hours rubbed down Both priming finish coats completely clear lacquer grain plywoodskin plainly visible Fuselage panels left polished magnesium Riflard claimed definite increase speed superior finish alone Ailerons split landing flaps similarly constructed single box spar birch-ply covering ball-bearing hinges Aileron control ingenious system levers developed Riffard himself housed within thickness wing Only two tiny bulges underside necessary clear ends aileron horns fitted rubber cord shock-damper manually operated flaps fitted rubber cord compensators reduce opening loads could locked closed fully open 45 degrees deflection Messier retractable undercarriage operated double-acting hydraulic jacks hydraulic system powered motordriven pump standby hand-pump additional emergency extension circuit Both main wheels welded steel tailskid controlled single lever indicating lamps show position main leg Material finish tail surfaces identical wing used single box spar spruce leading edges birch plywood covering torque tube leading edges elevators rudder ball bearing hinges flying controls balanced rubber shock cord cable operated via positive mechanical linkage surface parts especially reinforced against repetition damage led destruction C712 pilots cockpit fully enclosed sliding canopy similar famous C460 its vertical frames fixed rear fairing small close-fitting helmet ended abruptly sloping knife-edge refinement cockpit fairing system Riffards first two generations Coupe Deutsch aircraft developed Georges Otfinovsky decrease wetted area reduced drag weight September 1980 119 ZONA SAWS famous line hobby saws Razor #200 $190 $165 #1*345 Replacement blades available dealer F Model Supply PO Box 3957 Toerance CA 90510 USA effectiveness fin increased because additional length its leading edge Entry exit removable door left-hand side windscreen could jettisoned flight both seat rudder pedals adjustable inverted v-i 2 overhead-valve engine special version aircooled supercharged 19-litre Renault 613 produced 900 hp 300 m 1000 ft Basically similar 450-hp Renault 12R-01 powered C714 fighter special engines compression ratio increased 640 725 its manifold pressure 323 496 inches mercury thus boosting nominal rpm 2500 3000 Propeller shaft forward crankcase extended some 10 cm 4 allow superior streamlining nose improved intake engine cooling duct Formed magnesium-alloy panels made up engine cowling Carburetor feed ducted bottom single intake cooling air carefully baffled ensure cooling cylinders discharged beneath fuselage through large louvre flank Steamlined exhausts chrome-molybdenum steel oil cooler almost half large again C712 made up two closespaced skins riveted together fitted underside rear fuselage magnesium fuel tank 206 litres 45 gallons capacity situ ated behind engine firewall 345 litre 76 gallons oil tank fitted behind pilots seat three-bladed Ratier propeller early form constant speed unit already fitted modified C7 12 Blade pitch could varied 300 45 0 controlled reversible electric motor connected throttle control centrifugal regulator altered blade angle opposition changes engine speed NEWIkE FliqilT LiNE Box Perfect competitor Small light yet big enough -12 volt battery power panel starter extra props plugs much Assembled Finished $995 Complete starter panel battery$7185 Also CL specialized accessories Send 254 info ThePO Box 4981 Pike Fiht Lancaster PA 17604 ivX phone 717 29P2136 Exhaustive wind tunnel tests carried out January 1939 Eiffel Laboratory using 1/10th scale models complete aircraft wing alone known performance C460 basis taking account relative propeller efficiencies propeller/aircraft interference cooling drag possible calculate considerable accuracy both level flight climb performance shown table below success denied C714R highly qualified group under Marcel Riffard created protracted delays due manpower shortages military production well great care lavished surface finish engine development help up completion until war Germany inevitable ideas record attempt abandoned C7 14R did fly reach Istres German forces approached Paris June 1940 hidden ample cellars Renault building Champs-Elysees survived occupation undetected Following liberation Paris 1944 C714R displayed aviation exhibition held Velodrome dHiver sports stadium falsely represented product re-emerging French aviation industry Its immaculate clear lacquer covered familiar greyish mid-blue Caudron Coupe Deutsch machines later repainted darker saturated shade resembling midnight blue Detroyats C460 C7 1 4R placed permanent display Musee de lAir Chalais-Meudon remained until recentfy being added present display le Bourget Its rudder still bravely bears blue white red tricolor France legend C7 14R / Avions Caudron Before being displayed Le Bourget during Paris Salon 1971 name RIFFARD added fitting belated tribute genius man drive initiative made name Caudron synonymous speed author gratefully acknowledges patient cooperation Monsieur Georges Otfinovsky well help Conservateur staff Musee de lAir preparing article scale drawing CL Combat/Johnson continued page 41 5% nitro fuel contest management supplied fuel little dye FAI has gained popularity local level using airplane set lines Also adopting least first round losers bracket FAI nice touch dont have time full double elimination system about least first round losers bracket Nats year remember last year against changed minds after first round Right SB Send orders Kustom Kraftsmanship PO Box 2699 Laguna Hills CA 92653 KK pays postage items sent within USA California residents pay additional 6% sales tax Mini mum order $500 Id send catalogs first send self-addressed envelope just cant wait heres some stuff youll need Stock No 102 New TD customized $3550 Stock No 104 New TD larger venturi $3595 Stock No 174 Custom TD Fine thread needle valve assembly $475 Stock No 170 Piston/Rod reset tool $295 Stock No 510 Universal Custom Needle valve $475 fits Rossi Tigre 15 Piston/rod reset tool absolute must youre going run TD very much Complete instructions come handy device Charlie Johnson 3716 Ingraham St San Diego CA 92109 FF Sport/Scale/Warner continued page 49 Xerox copy 1% larger original plan can slice inside black lines no great penalty have sand em off before applying translucent tissue covering Retracting gear rubber jobs has long dream bored-with-it-all modelers Imagine being first kid block pull up wheels takeoff Joe Ott Spitfire Well Nick DeCarlis Gainesville FL has picked up Tomy Mini-Bath-tubbie motor idea kicked around among free fighters lot after FF Liar newsletter suggested its use HLG dethermalizers Nick uses spinning arm little balsa flag end slow down toy motor As unwinds pays out thread holds gear extended position Rubberband tension provides power pull gear up hold tailskid trigger start going via 1/16 sq pushrod Nick reports about 8second retract time should prove really great see test bed Keith Ryder racer gear retracting straight back sim plicity Bostonian West new class planes 16 max span 14 max length 6 max prop dia windows 3 max chord enclosing box 1 x 2 x 3 main characteristic 120 Model Aviation REPUBLIC SEABEE s PRODUCTS 1100 Michigan Box 161 Maryaville MI 48040 Wing Span 70 Complete Hardware Epoxy Glass Retractable Gear 40 Powered Factors