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Lycoming O-435

 

Lyc-TVO-435
Lycoming TVO-435

 

The Lycoming O-435 is a six-cylinder, horizontally opposed fixed-wing aircraft and helicopter engine made by Lycoming Engines, first run in the early 1940s. The engine is a six-cylinder version of the four-cylinder Lycoming O-290.

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:
O-435-A
O-435-C
O-435-D
GO-435
GO-435-B

 

Applications:

Aircraft
Aero Commander 500
AISA I-115
Beechcraft Bonanza
Bellanca Cruisemaster
Boisavia Mercurey
D'Apuzzo Senior Aero Sport
de Havilland Canada Super Chipmunk
Fleetwings BQ-2
Fokker F.25
Fokker S-11
Helio Courier
H-13 Sioux
Interstate TDR
Jeffair Barracuda
Karhumäki Karhu
Kawasaki KH-4
L-5 Sentinel
LIBIS KB-11
Miles Aerovan
OH-23 Raven
Piaggio P.148
Piaggio P.149
Pilatus P-4
Ra-Son Warrior
Saab 91 Safir
UTVA Aero 3
UTVA 56
Vertical Hummingbird

Other
M22 Locust – tank

 

Specifications:
O-435-D
Type: Six-cylinder horizontally-opposed gasoline piston engine
Bore: 4.875 in (123.7 mm)
Stroke: 3.875 in (98.4 mm)
Displacement: 434 cu in (7.1 L)
Width: 33.5 in (824 cm)
Height: 43.5 in (1,105 cm)
Dry weight: 433 lb (196.6 kg)
Valvetrain: Overhead valve, 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
Reduction gear: Direct-drive
Power output: 212 hp (158 Kw)at 3,000 rpm at sea level
Compression ratio: 7.5:1

 



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