Object Details
Manufacturer
Aircooled Motors Corporation (Franklin)
Physical Description
Type: Reciprocating, opposed-type, 6 cylinders, air-cooled
Power rating: 183 kW (245 hp) at 3,275 rpm
Displacement: 6.97 L (425 cu in.)
Bore and Stroke: 121 mm (4.75 in.) x 102 mm (4 in.)
Weight: 207.7 kg (458 lb)
Summary
Several former engineers of the failed Franklin Automobile Company formed Air Cooled Motors in 1935. By 1938 a range of flat-4 and 6 aircraft engines was being produced, retaining the Franklin name. This post-war product was the largest model. 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.
This is an early vertically-mounted, fan-cooled helicopter engine. The Aircooled Motors (Franklin) O-405-9 was installed in the Sikorsky XH-6A, YH-6A, H-6A, YH-6, Sikorsky XH-7, Kellett XH-8, and XH-8A helicopters. The Franklin designation for this engine was 6ACV-403.
Credit Line
Transferred from the U.S. Air Force Central Museum
Date
Circa1943
Inventory Number
A19600105000
Restrictions & Rights
Usage conditions apply
Type
PROPULSION-Reciprocating & Rotary
Materials
HAZMAT: Cadmium Plating
Aluminum
Paint
Steel
Paper
Ink
Adhesive
Synthetic Rubber
Dimensions
Length 108.3 cm (42.6 in.), Width 112.4 cm 44.25 in.), Height 131.4 cm (51.75 in.)
Country of Origin
United States of America
See more items in
National Air and Space Museum Collection
Data Source
National Air and Space Museum
Link to Original Record
Record ID
nasm_A19600105000