Cylinder, Union Gas Engine Co. Engine


Display Status:

This object is on display in the Boeing Aviation Hangar at the Steven F. Udvar-Hazy Center in Chantilly, VA.

Cylinder, Union Gas Engine Co. Engine

Collection Item Summary:

Union Engine Cylinder

Designed in 1915, the 89 kw (120 shp) Union aircraft engine was the first to pass the U.S. government 50-hour test, which took place in 1917. Union engines were built primarily for use in lighter-than-air craft. A Union engine of this type powered the trans-Atlantic trial and record flight of the U.S.N. Airship C-5 in 1919.

Collection Item Long Description:


Circa World War I

Inventory Number


Physical Description

In-line 6 engine cylinder with sheet steel, welded water jacket. One valve and spring installed. Six mounting tabs at base; two of these have holes drilled for studs/bolts. Two spark plug holes. Two fittings for water (i.e. inlet and outlet).

Credit Line

Found In Collection. Donor Unknown at this Time. Found on NASM Premises.

Country of Origin

United States of America




45.7 x 17.8 x 15.2 cm (18 x 7 x 6 in.)

Data Source

National Air and Space Museum

Restrictions & Rights

Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum


PROPULSION-Components (Engine Parts)

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