Piston and Connecting Rod, Oberursel UR IIIa


Display Status:

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

Piston and Connecting Rod, Oberursel UR IIIa

Collection Item Summary:

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.

Collection Item Long Description:

Inventory Number


Physical Description

119 kw (160 shp), one piston and connecting rod.

Credit Line

Transferred from the War Department, Air Corps, Materiel Division, Wright Field, Dayton, Ohio. No known restrictions.

Country of Origin



  • Steel - Rod
  • Aluminum - Piston

Data Source

National Air and Space Museum


PROPULSION-Components (Engine Parts)