Skip to main content Smithsonian Institution

Engine, Aircooled Motors (Franklin) O-335-5D, Horizontally-Opposed 6

Catalog Data

Manufacturer:
Aircooled Motors Corporation (Franklin)  Search this
Materials:
Steel
Paint
Aluminum
Rubber
Cadmium Plating
Copper Alloy
Plastic
Dimensions:
Height 65.4 cm (25.75 in.), Width 78.4 cm (30.88 in.), Depth 91.4 cm (36 in.)
Type:
PROPULSION-Reciprocating & Rotary
Country of Origin:
United States of America
Date:
Circa 1950
Physical Description:
Type: Reciprocating, 6 cylinders, Horizontally opposed, Air-cooled
Power rating: 157 kW (210 hp) at 3,200 rpm
Displacement: 5.5 L (335 cu in.)
Bore and Stroke: 114 mm (4.50 in.) x 89 mm (3.50 in.)
Weight: 130.6 kg (288 lb)
Summary:
Several engineers of the failed Franklin Automobile Company of Syracuse, New York, a manufacturer of air-cooled automobiles, formed Air Cooled Motors in 1935. By 1938 a range of flat-4 and 6 aircraft engines was being produced, retaining the Franklin name.
Installed vertically, with a fan providing additional engine cooling, the O-335-5D powered the Bell TH-13M Sioux helicopter and its civil counterpart, the Model 47.
In 1975, the company disbanded and sold all rights to the Polish government, becoming part of PZL, an association of Polish aero and engine manufacturers. Following the 1989 fall of Communism, the firm became WSK PZL – Rzeszów.
Credit Line:
Transferred from the U.S. Marine Corps, Marine Corps Air-Ground Museum and Museums Branch Activities
Inventory Number:
A19870202000
Restrictions & Rights:
Usage conditions apply
See more items in:
National Air and Space Museum Collection
Data Source:
National Air and Space Museum
GUID:
http://n2t.net/ark:/65665/nv9fb69bd49-57d7-4583-93f3-357cc02f8e05
EDAN-URL:
edanmdm:nasm_A19870202000