In 1931, the V-770 design was built, derived from the Ranger 6-440 series of inverted inline air-cooled engines, and test flown in the Vought XSO2U-1 Scout. In 1938 it was tested in the Curtiss SO3C Seamew but was found to be unreliable with a tendency to overheat in low-speed flight, but would still be the most produced aircraft to have the V-770, with 795 being built.[2][3] By 1941 a more developed V-770 was installed in the Fairchild XAT-14 Gunner prototype gunnery school aircraft, which went into limited production as the Fairchild AT-21 Gunner, of which 174 were built, not including one radial engine prototype.[4]
Produced from 1941 to 1945, the V-770 featured a two-piece aluminum alloy crankcase, steel cylinder barrels with integral aluminum alloy fins and aluminum alloy heads. The V-770 was the only American inverted V-12 air-cooled engine to reach production. The engine was used in very few aircraft, among them the short lived Fairchild AT-21 twin-engine bomber trainer,[5] and in the two Bell XP-77 light-weight fighter prototypes.
(V-770-17) Similar to C-2A but with raised hollow propeller shaft for mounting cannon or machine gun.
SGV-770D-5
Developed for post-war commercial use,[1] 700 hp (520 kW) at 3,600 RPM, weight 870 lb (390 kg), height 31.11 in (790 mm), length 74.92 in (1,903 mm), width 33.28 in (845 mm)
Wikimedia Commons has media related to Ranger V-770.
^ abcJane, Frederick Thomas; Bridgman, Leonard; Gunston, Bill (1989), Jane's Fighting Aircraft of World War II, London: Random House, ISBN1-85170-493-0
^Smith, Herschel H. (1986), Aircraft Piston Engines: From the Manly Balzer to the Continental Tiara, SunflowerUniversity Press, p. 255, ISBN978-0-89745-079-9, OCLC 14253144
^ abcEden, Paul; Moeng, Soph (2002), The Complete Encyclopedia of World Aircraft, London: Amber Books, ISBN978-0-7607-3432-2
^ abcdSwanborough, F. G.; Bowers, Peter M. (1964), United States Military Aircraft Since 1909, New York: Putnam, ISBN0-85177-816-X
^. National Museum of the USAF. Archived from the original on 30 December 2008. Retrieved 7 November 2008.
^ abcBridgman, Leonard (1937). Grey, C.G. (ed.). Jane's all the World's Aircraft 1937. London: Sampson Low, Marston & Co. Ltd.
ranger, american, cooled, inverted, aircraft, engine, developed, ranger, aircraft, engine, division, fairchild, engine, aircraft, corporation, early, 1930s, 770preserved, type, piston, aero, enginemanufacturer, ranger, aircraft, engine, divisionfirst, 1931majo. The Ranger V 770 was an American air cooled inverted V 12 aircraft engine developed by the Ranger Aircraft Engine Division of the Fairchild Engine amp Aircraft Corporation in the early 1930s 1 V 770Preserved Ranger V 770Type Piston aero engineManufacturer Ranger Aircraft Engine DivisionFirst run 1931Major applications Curtiss SO3C Seamew Contents 1 Design and development 2 Variants 3 Applications 4 Engines on display 5 Specifications SGV 770C 1 5 1 General characteristics 5 2 Components 5 3 Performance 6 See also 7 ReferencesDesign and development EditIn 1931 the V 770 design was built derived from the Ranger 6 440 series of inverted inline air cooled engines and test flown in the Vought XSO2U 1 Scout In 1938 it was tested in the Curtiss SO3C Seamew but was found to be unreliable with a tendency to overheat in low speed flight but would still be the most produced aircraft to have the V 770 with 795 being built 2 3 By 1941 a more developed V 770 was installed in the Fairchild XAT 14 Gunner prototype gunnery school aircraft which went into limited production as the Fairchild AT 21 Gunner of which 174 were built not including one radial engine prototype 4 Produced from 1941 to 1945 the V 770 featured a two piece aluminum alloy crankcase steel cylinder barrels with integral aluminum alloy fins and aluminum alloy heads The V 770 was the only American inverted V 12 air cooled engine to reach production The engine was used in very few aircraft among them the short lived Fairchild AT 21 twin engine bomber trainer 5 and in the two Bell XP 77 light weight fighter prototypes Variants Edit V 770 7 in Bell XP 77 mockup V 770 4 Installed in the Vought XSO2U 1 scout aircraft V 770 6 Installed in the Fairchild XAT 14 Gunner prototype intended for the Ryan SOR 1 Scout V 770 7 Installed in the Bell XP 77 lightweight fighter prototype V 770 8 Installed in the Curtiss SO3C Seamew Scout 3 V 770 9 Installed in the North American XAT 6E Texan prototype 4 V 770 11 Installed in the Fairchild AT 21 Gunner 4 V 770 15 Installed in the Fairchild AT 21 Gunner 4 V 770 17 Similar to V 770 8 but with raised hollow propeller shaft for mounting cannon or machine gun GV 770 Geared un supercharged variants 6 SV 770 Supercharged direct drive variants 6 SGV 770 Supercharged and geared variants 6 SGV 770C 1 Tested in the Curtiss XF6C 7 Hawk fighter bomber at 350 hp 260 kW 3 SGV 770C 1B V 770 11 SGV 770C 2A V 770 8 SGV 770C B1 Installed in the Ikarus 214 prototype SGV 770D 4 V 770 17 Similar to C 2A but with raised hollow propeller shaft for mounting cannon or machine gun SGV 770D 5 Developed for post war commercial use 1 700 hp 520 kW at 3 600 RPM weight 870 lb 390 kg height 31 11 in 790 mm length 74 92 in 1 903 mm width 33 28 in 845 mm Applications EditBell XP 77 Curtiss SO3C Seamew Edo OSE Fairchild F 46 Fairchild AT 21 Gunner Fairchild BQ 3 Ikarus 213 Utva 213 Vihor Ikarus 214 prototype Vought XSO2U North American XAT 6EEngines on display EditThis section needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed July 2021 Learn how and when to remove this template message One restored engine in storage at the Carolinas Aviation Museum One survives at Cincinnati State Aviation school One modified V 770 survives in an art car by Michael Leeds 7 The Yankee Air Museum has a V 770 on display One restored engine at the Vintage Flying Museum in Fort Worth Specifications SGV 770C 1 Edit The Ranger V 770 engine as viewed along the cylinders Data from Janes Fighting Aircraft of World War II 1989 1 General characteristics Type 12 cylinder inverted Vee piston engine Bore 4 in 102 mm Stroke 5 125 in 130 mm Displacement 773 cu in 12 7 L Length 62 in 1 575 mm Width 28 in 711 mm Height 32 2 in 818 mm Dry weight 730 lb 330 kg Components Valvetrain Single overhead camshaft SOHC 1 shaft per bank gear driven Supercharger Single speed single stage produced 45 inches of mercury 1 5 bar 22 psi at take off Fuel system Holley non icing carburetor Fuel type 87 octane gasoline Oil system Full pressure type Cooling system Air cooledPerformance Power output 520 hp 390 kW at 3 150 rpm Specific power 0 68 hp in Compression ratio 6 5 1 Power to weight ratio 0 71 hp lbSee also EditComparable engines Argus As 410 Argus As 411 de Havilland Gipsy Twelve Walter SagittaRelated lists List of aircraft enginesReferences Edit Wikimedia Commons has media related to Ranger V 770 a b c Jane Frederick Thomas Bridgman Leonard Gunston Bill 1989 Jane s Fighting Aircraft of World War II London Random House ISBN 1 85170 493 0 Smith Herschel H 1986 Aircraft Piston Engines From the Manly Balzer to the Continental Tiara SunflowerUniversity Press p 255 ISBN 978 0 89745 079 9 OCLC 14253144 a b c Eden Paul Moeng Soph 2002 The Complete Encyclopedia of World Aircraft London Amber Books ISBN 978 0 7607 3432 2 a b c d Swanborough F G Bowers Peter M 1964 United States Military Aircraft Since 1909 New York Putnam ISBN 0 85177 816 X Ranger V 770 Inverted National Museum of the USAF Archived from the original on 30 December 2008 Retrieved 7 November 2008 a b c Bridgman Leonard 1937 Grey C G ed Jane s all the World s Aircraft 1937 London Sampson Low Marston amp Co Ltd Blown Ranger Retrieved from https en wikipedia org w index php title Ranger V 770 amp oldid 1127996175, wikipedia, wiki, book, books, library,
