Lycoming O-435
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| O-435 | |
|---|---|
| |
| Type | Piston tank and aircraft engine |
| National origin | United States |
| Manufacturer | Lycoming Engines |
| First run | 1939 |
| Major applications | Beechcraft Bonanza Bell 47 Helio Courier Hiller OH-23 Raven M22 Locust Stinson L-5 Sentinel |
| Produced | 1942–1975 out of production |
| Developed from | Lycoming O-290 |
The Lycoming O-435 is an American six-cylinder, horizontally opposed fixed-wing aircraft and helicopter engine made by Lycoming Engines. The engine is a six-cylinder version of the four-cylinder Lycoming O-290.
Design and development[]
The powerplant is a horizontally opposed Lycoming six-cylinder design. It is a direct-drive or geared, air-cooled, and normally aspirated engine. The cylinders have steel barrels with aluminum heads, and the valves are operated by hydraulic lifters. The crankshaft is supported in an aluminum-alloy split case by four main bearings and one ball-thrust bearing, and lubricating oil is supplied from a 12 quart wet sump. The camshaft rides in journals that do not employ bearing inserts. The accessory housing supports two magnetos, a starter, a generator, and a dual tach drive. A spare mounting pad is included for a vacuum pump.
Variants[]
All engines have an additional prefix preceding the 435 to indicate the specific configuration of the engine. There are also numerous engine suffixes, denoting different accessories such as different manufacturers' carburetors, or different magnetos.
- XO-435-1
- XO-435-3
- (GO-435)
- O-435-5
- (O-435-B)
- O-435-6
- O-435-7
- (O-435-B1)
- O-435-9
- O-435-11
- O-435-13
- O-435-A
- O-435-B
- O-435-C
- O-435-D
- GO-435
- GO-435-B
- TVO-435
- 270 hp (201 kW)
- TVO-435-A
- TVO-435-25
- 260 hp (194 kW)
- VO-435
- 200 hp (149 kW)
- VO-435-23
- 250 hp (186 kW)
- VO-435-B1B
Applications[]
- Aircraft
- Aero Commander 500
- AISA I-115
- Beechcraft Bonanza,
- Bell 47
- Bell H-13 Sioux
- Bellanca Cruisemaster
- Boisavia Mercurey
- D'Apuzzo Senior Aero Sport
- de Havilland Canada Super Chipmunk
- Fleetwings BQ-2
- Fleetwings PQ-12
- Fokker F.25
- Fokker S-11
- Helio Courier
- Hiller OH-23 Raven
- Interstate TDR
- Jeffair Barracuda
- Karhumäki Karhu
- Kawasaki KH-4
- LIBIS KB-11
- Miles Aerovan
- Piaggio P.148
- Piaggio P.149
- Pilatus P-4
- Ra-Son Warrior
- Ryan Navion
- Saab 91 Safir
- Stinson 108
- Stinson L-5 Sentinel
- St Croix Sopwith Triplane
- UTVA Aero 3
- UTVA 56
- Vertical Hummingbird
- Other
- M22 Locust - tank
Specifications (O-435-D)[]
Data from Jane's.[1]
General characteristics
- Type: Six-cylinder horizontally-opposed gasoline piston engine
- Bore: 4.875 in (123.8 mm)
- Stroke: 3.875 in (98.4 mm)
- Displacement: 434 cu in (7.1 L)
- Width: 33.5 in (851 mm)
- Height: 43.5 in (1,105 mm)
- Dry weight: 433 lb (196.6 kg)
Components
- Valvetrain: Overhead valve (OHV, pushrod actuated), one inlet and one exhaust valve per cylinder
- Fuel system: Marvel-Schebler carburetor
- Fuel type: 100 octane gasoline
- Oil system: Pressure pump type
- Cooling system: Air-cooled by fan (helicopter installations)
- Reduction gear: Direct-drive
Performance
- Power output: 212 hp (158 kW) at 3,000 rpm at sea level
- Compression ratio: 7.5:1
See also[]
Related development
Comparable engines
Related lists
References[]
Notes[]
- ^ Bridgman 1994, p. 78d.
Bibliography[]
- Bridgman, Leonard. Jane's All the World's Aircraft 1945-46. Hammersmith, London: HarperCollinsPublishers (1994 reprint). ISBN 000 470831-8
External links[]
Media related to Lycoming O-435 at Wikimedia Commons
- Lycoming aircraft engines
- Boxer engines
- 1940s aircraft piston engines