The Franklin O-335 (company designations variations on 6A and 6V) was an American air-cooled aircraft engine of the 1940s. The engine was of six-cylinder, horizontally-opposed layout and displaced 335 cu in (5.5 L). The power output of later variants was 225 hp (168 kW).
These engines were commonly vertically mounted and used to power many early helicopters in the United States. They were closely related to the 2A4 and 4A4 2- and 4-cylinder engines. In various subtypes, the 6A4 remained in continuous production from 1945 to the time Franklin's United States operations ceased in 1975, with versions continuing in Polish production into the 1990s.
Wilkinson, Paul H. (1945). Aircraft Engines of the world 1945. New York: Paul H. Wilkinson. pp. 80–81.
US Department of Transportation Federal Aviation Administration Type Certificate Data Sheet E-238 Revision 12, December 8, 1994.
January 01, 1970
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This article includes a list of general references but it lacks sufficient corresponding inline citations Please help to improve this article by introducing more precise citations December 2017 Learn how and when to remove this message The Franklin O 335 company designations variations on 6A and 6V was an American air cooled aircraft engine of the 1940s The engine was of six cylinder horizontally opposed layout and displaced 335 cu in 5 5 L The power output of later variants was 225 hp 168 kW O 335 6A 6V Type Flat 6 National origin United States Manufacturer Franklin Engine Company Major applications Bell 47 Contents 1 Design and development 2 Variants 3 Applications 4 Specifications 6AL 335 6A4 150 B3 4 1 General characteristics 4 2 Components 4 3 Performance 5 See also 6 Notes 7 ReferencesDesign and development editThese engines were commonly vertically mounted and used to power many early helicopters in the United States They were closely related to the 2A4 and 4A4 2 and 4 cylinder engines In various subtypes the 6A4 remained in continuous production from 1945 to the time Franklin s United States operations ceased in 1975 with versions continuing in Polish production into the 1990s In 1947 this engine was modified into a water cooled version by the Tucker Car Corporation for use in the 1948 Tucker Sedan Tucker liked the engine so much that he purchased the Aircooled Motors Franklin Engine Company and it remained under the ownership of the Tucker family until 1961 Variants editO 335 1 Military designation of vertical installation model for helicopters 175 hp 130 kW O 335 3 Similar to 1 but changes in starter installation O 335 5 200 hp 149 kW O 335 5B 200 hp 149 kW 6A 335 180 hp 134 kW at 2 800 rpm 6AL 335 150 hp 112 kW at 2 600 rpm 6A4 125 125 hp 93 kW at 2 200 rpm 6A4 130 130 hp 97 kW at 2 200 rpm 6A4 135 135 hp 101 kW at 2 450 rpm 6A4 140 140 hp 104 kW at 2 375 rpm 6A4 145 145 hp 108 kW at 2 600 rpm 6A4 150 150 hp 112 kW at 2 600 rpm 6A4 165 165 hp 123 kW at 2 800 rpm 6A4 200 200 hp 149 kW at 3 100 rpm 6AG 335 220 hp 164 kW at 3 400 rpm 6AG4 185 185 hp 138 kW at 3 100 rpm 6AGS 335 260 hp 194 kW at 3 400 rpm 6AS 335 240 hp 179 kW at 3 200 rpm 6V 335 B 210 hp 157 kW at 3 100 rpm 6V 335 A1A 200 hp 149 kW at 3 100 rpm 6V 335 A1B 200 hp 149 kW at 3 100 rpm 6V4 165 165 hp 123 kW 6V4 178 B32 178 hp 133 kW at 3 000 rpm 6V4 200 C32 200 hp 149 kW at 3 100 rpm 6VS O 335 225 hp 168 kW at 3 200 rpmApplications edit nbsp A Franklin O 335 in a Tucker 48 at Stahls Automotive Collection Aero Flight Streak Aeronca Sedan Bartlett Zephyr Bell 47 Bell H 13 Sioux Bellanca Cruisair Brantly B 1 Goodyear Duck Hiller H 23 Raven Hiller 360 Hirth Acrostar HTM Skytrac Maule M 5 220C Lunar Rocket Republic RC 3 Seabee Seibel S 4 Sikorsky S 52 Socata MS 894 Rallye Minerva Stinson Voyager Sznycer SG VI Taylorcraft 15 Temco TE 1B Tucker automobile Temco YT 35 BuckarooSpecifications 6AL 335 6A4 150 B3 edit nbsp Franklin O 335 6AC Engine Data from Wilkinson 1 General characteristics Type 6 cylinder air cooled horizontally opposed direct drive supercharged aircraft piston engine Bore 4 5 in 114 3 mm Stroke 3 5 in 88 9 mm Displacement 335 cu in 5 49 L Length 37 4 in 950 mm Width 30 8 in 780 mm Height 21 6 in 550 mm Dry weight 307 lb 139 kg Components Valvetrain OHV 1 x inlet valve 1 x exhaust valve operated by pushrods Supercharger Mechanically driven supercharger Fuel system 1x Marvel Schebler MA 3SPA updraught carburettor Fuel type 80 Octane gasoline Oil system 80 S U secs 15 6 cSt grade pressure fed at 40 psi 3 bar wet sump Cooling system Air cooled Delco Remy direct cranking electric starter motor Performance Power output Take off 150 hp 110 kW at 2 600 rpm Normal 150 hp 110 kW at 2 600 rpm at sea level Cruising 112 hp 84 kW at 2 350 rpm at sea level Specific power 0 45 hp cu in 20 35 kW L Compression ratio 7 1 Specific fuel consumption 0 51 lb hp h 0 311 kg kW h cruising 4 5 US gal hp h cruising Oil consumption 0 01 lb hp h 0 006 kg kW h Power to weight ratio 0 488 hp lb 0 8 kW kg B m e p 137 psi 945 kPa See also editComparable engines Lycoming O 435 Related lists List of aircraft enginesNotes edit Wilkinson Paul H 1945 Aircraft Engines of the world 1945 New York Paul H Wilkinson pp 80 81 References edit nbsp Wikimedia Commons has media related to Franklin O 335 Gunston Bill 1986 World Encyclopedia of Aero Engines Patrick Stephens Wellingborough p 57 Erickson Jack Horizontally Opposed Piston Aero Engines Wilkinson Paul H 1945 Aircraft Engines of the world 1945 New York Paul H Wilkinson pp 80 81 US Department of Transportation Federal Aviation Administration Type Certificate Data Sheet E 238 Revision 12 December 8 1994 Retrieved from https en wikipedia org w index php title Franklin O 335 amp oldid 1155126872, wikipedia, wiki, book, books, library,
