Oberursel UR IIIa

Before 1914, the Oberursel company of Frankfurt, Germany had obtained a license to build Gnome engines. However, these pre-World War I designs became obsolete, and with the encouragement of the Army's Inspectorate of Aviation, the company embarked on the manufacture of a copy of the 82 kw (110 hp) Le Rhone engine. Oberursel-built copies began to be available from 1917.

Convinced of the merits of the rotary engine for conferring good performance on his aircraft, Fokker acquired the Oberursel company. Oberursel Le Rhones powered aircraft such as the Fokker Triplane and D VI scouts.

This 119 kw (160 shp) Oberursel UR IIIa powered Fokker D VI, Fokker Dr I, and Pfalz D VI aircraft during World War I.

 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
Country of Origin Germany Type PROPULSION-Components (Engine Parts) Manufacturer Oberursel Motoren Gesellschaft (Frankfurt, Germany)
 Physical Description 119 kw (160 shp), one piston and connecting rod. Dimensions 3-D: 33 × 10.8 × 14.6cm (1 ft. 1 in. × 4 1/4 in. × 5 3/4 in.)
 Materials Steel - Rod
Aluminum - Piston
Copper alloy - Bushing
 Inventory Number A19340005001 Credit Line Transferred from the War Department, Air Corps, Materiel Division, Wright Field, Dayton, Ohio. No known restrictions. Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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