fbpx
Wikipedia

Franklin O-425

February 04, 2024

The Franklin O-425 (company designation 6AG/6V6) was an American air-cooled aircraft engine that first ran in the mid-1940s. The engine was of six-cylinder, horizontally-opposed layout and displaced 425 cu in (7 L). The power output was between 240 hp (179 kW) and 285 hp (213 kW) depending on variant. The O-405-13 (6V6-300-D16FT) of 1955 was a vertically mounted, turbocharged and fan cooled version for helicopters.

O-425/6AG/6V6
Type Piston aircraft engine
National origin United States
Manufacturer Franklin Engine Company
First run 1944

Variants edit

6AG6-245
Geared propeller drive at 0.623:1, 245 hp (183 kW) at 3,300 rpm, (XO-425-5).
6AGS6-245
Supercharged and geared, 250 hp (186 kW) at 3,200 rpm, (XO-425-3).
6V6-245-B16F
Vertically mounted, fan-cooled helicopter version, 245 hp (183 kW) at 3,275 rpm, (XO-425-1).
6V6-300-D16FT
Vertically mounted, turbocharged, fan-cooled helicopter version, 285 hp (213 kW) at 3,275 rpm, (O-425-13).
O-425-1
O-425-2
O-425-3
O-425-5
O-425-9
O-425-13

Applications edit

Specifications (O-425-5) edit

Data from Aircraft engines of the World 1950.[1]

General characteristics

  • Type: 6-cylinder air-cooled horizontally-opposed aircraft piston engine
  • Bore: 4.75 in (120.7 mm)
  • Stroke: 4 in (101.6 mm)
  • Displacement: 425.3 cu in (6.97 L)
  • Length: 47 in (120 cm)
  • Width: 33.3 in (84.6 cm)
  • Height: 30 in (76 cm)
  • Dry weight: 405 lb (184 kg)

Components

  • Valvetrain: 1 x exhaust and inlet OHV driven by pushrods and rockers
  • Fuel system: 1 x Bendix-Stromberg PS-780 up-draught carburetor with automatic mixture control
  • Fuel type: 80 Octane / US Army 2-103 all-purpose motor fuel
  • Oil system: Pressure system at 55 psi (380 kPa)
  • Cooling system: Air-cooled

Performance

  • Power output:
  • Take-off: 245 hp (183 kW) at 3,300 rpm
  • Normal: 240 hp (180 kW) at 3,200 rpm at sea level
  • Cruise: 168 hp (125 kW) at 2,840 rpm at sea level

See also edit

Comparable engines

Related lists

References edit

  1. ^ Wilkinson, Paul H. (1950). Aircraft engines of the World 1950 (8th ed.). London: Sir Isaac Pitman & Sons Ltd. pp. 156–157.

Further reading edit

  • Gunston, Bill (2006). World Encyclopaedia of Aero Engines (5th ed.). Stroud: Sutton Publishing. ISBN 978-0-7509-4479-3.
  • Gunston, Bill (1989). World Encyclopaedia of Aero Engines (2nd ed.). Cambridge, England: Patrick Stephens Limited. ISBN 978-1-85260-163-8.
  • Gunston, Bill (1993). World Encyclopedia of Aircraft Manufacturers. Annapolis: Naval Institute press. ISBN 9781557509390.

February 04, 2024
franklin, company, designation, american, cooled, aircraft, engine, that, first, 1940s, engine, cylinder, horizontally, opposed, layout, displaced, power, output, between, depending, variant, d16ft, 1955, vertically, mounted, turbocharged, cooled, version, hel. The Franklin O 425 company designation 6AG 6V6 was an American air cooled aircraft engine that first ran in the mid 1940s The engine was of six cylinder horizontally opposed layout and displaced 425 cu in 7 L The power output was between 240 hp 179 kW and 285 hp 213 kW depending on variant The O 405 13 6V6 300 D16FT of 1955 was a vertically mounted turbocharged and fan cooled version for helicopters O 425 6AG 6V6Type Piston aircraft engineNational origin United StatesManufacturer Franklin Engine CompanyFirst run 1944 Contents 1 Variants 2 Applications 3 Specifications O 425 5 3 1 General characteristics 3 2 Components 3 3 Performance 4 See also 5 References 6 Further readingVariants edit6AG6 245 Geared propeller drive at 0 623 1 245 hp 183 kW at 3 300 rpm XO 425 5 6AGS6 245 Supercharged and geared 250 hp 186 kW at 3 200 rpm XO 425 3 6V6 245 B16F Vertically mounted fan cooled helicopter version 245 hp 183 kW at 3 275 rpm XO 425 1 6V6 300 D16FT Vertically mounted turbocharged fan cooled helicopter version 285 hp 213 kW at 3 275 rpm O 425 13 O 425 1O 425 2O 425 3O 425 5O 425 9O 425 13Applications editConvair XL 13 Republic YOA 15 intended Sikorsky S 52 Sikorsky YH 18 Stinson L 13Specifications O 425 5 editData from Aircraft engines of the World 1950 1 General characteristics Type 6 cylinder air cooled horizontally opposed aircraft piston engine Bore 4 75 in 120 7 mm Stroke 4 in 101 6 mm Displacement 425 3 cu in 6 97 L Length 47 in 120 cm Width 33 3 in 84 6 cm Height 30 in 76 cm Dry weight 405 lb 184 kg Components Valvetrain 1 x exhaust and inlet OHV driven by pushrods and rockers Fuel system 1 x Bendix Stromberg PS 780 up draught carburetor with automatic mixture control Fuel type 80 Octane US Army 2 103 all purpose motor fuel Oil system Pressure system at 55 psi 380 kPa Cooling system Air cooledPerformance Power output Take off 245 hp 183 kW at 3 300 rpm Normal 240 hp 180 kW at 3 200 rpm at sea level Cruise 168 hp 125 kW at 2 840 rpm at sea levelSpecific power 0 58 hp cu in 26 kW L Compression ratio 7 4 1 Specific fuel consumption 0 51 lb hp h 0 086 kg kW ks Oil consumption 0 015 lb hp h 0 0025 kg kW ks Power to weight ratio 0 606 hp lb 0 996 kW kg Reduction gear Planetary reduction gearing at 0 623 1See also editComparable engines Continental O 470 Lycoming O 480Related lists List of aircraft enginesReferences edit Wilkinson Paul H 1950 Aircraft engines of the World 1950 8th ed London Sir Isaac Pitman amp Sons Ltd pp 156 157 Further reading editGunston Bill 2006 World Encyclopaedia of Aero Engines 5th ed Stroud Sutton Publishing ISBN 978 0 7509 4479 3 Gunston Bill 1989 World Encyclopaedia of Aero Engines 2nd ed Cambridge England Patrick Stephens Limited ISBN 978 1 85260 163 8 Gunston Bill 1993 World Encyclopedia of Aircraft Manufacturers Annapolis Naval Institute press ISBN 9781557509390 Retrieved from https en wikipedia org w index php title Franklin O 425 amp oldid 1126204020, wikipedia, wiki, book, books, library,

article

, read, download, free, free download, mp3, video, mp4, 3gp, jpg, jpeg, gif, png, picture, music, song, movie, book, game, games.