J.Herris Halberstadt Aircraft of WWI. Volume 1: A-types to C.III (A Centennial Perspective on Great War Airplanes 44)

Halberstadt-Bristol Experimental Biplane

  The Halberstadt-Bristol Experimental Biplane was a single engine, two-seat biplane powered by a 100 hp Oberursel U.I 9-cylinder rotary engine. The biplane wings had three bays of interplane struts. The rudder was a single structure above the fuselage and the undercarriage had two wheels. The circular fuselage was made of wood and built in the Lameller way after the Rover patent.
  One example of this aircraft was built at the beginning of 1914.