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Engine, Lycoming XO-435-7, Horizontally-Opposed 6 Engine
Lycoming traces its beginning to a mid-nineteenth century sewing machine manufacturer. In 1907 that company was sold and restructured as the Lycoming Foundry and Machine Company, which produced automobile engines, and later was a subsidiary of the Auburn Auto Company. Although its early aircraft engines were radials, Lycoming entered the light-aircraft engine field early in 1938 with the introduction of the air-cooled, four-cylinder, horizontally opposed O-145 engine.
Along with Continental and Franklin, Lycoming was a basic provider of engines for the ubiquitous bright yellow Piper Cub, synonymous with small general aviation aircraft for many years. Most recently Lycoming became a subsidiary of Textron Inc.
Designed to operate in a vertical position, the XO-435-7 powered the Sikorsky XH-6 and H-6B helicopters. A shaft-driven fan ducted cooling air through a wrap-around engine cowling. Models of the O-435 powered aircraft such as the Vultee-Stinson L-5 and O-62 and Fleetwings XBQ-2 and PQ-12A.
Display Status
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Date
1943
Country of Origin
United States of America
Type
PROPULSION-Reciprocating & Rotary
Manufacturer
Lycoming (Williamsport, Pennsylvania)
Physical Description
Type: Reciprocating, horizontally-opposed, 6 cylinders, air-cooled
Power rating: 158 kW (212 hp) at 3,000 rpm
Displacement: 7.1 L (434 cu. in.)
Bore and Stroke: 124 mm (4.9 in) x 98 mm (3.9 in)
Weight: 196.4 kg (433 lb)
Dimensions
Height 75.2 cm (29.6 in.), Width 82.1 cm (32.3 in.), Depth 121.2 cm (47.7 in.)
Materials
HAZMAT: Possible Cadmium Plating, Magnesium, Lead
Steel
Paint
Aluminum
Copper Alloy
Magnesium Alloy
Aluminized Fabric
Wool Felt
Paper
Adhesive
Plastic
Compressed Fiberboard
Rubber
Inventory Number
A19600107000
Credit Line
Transferred from the U.S. Air Force Central Museum
Data Source
National Air and Space Museum
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