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

Halberstadt A.I

  The Halberstadt A.I was a single engine, two-seat Taube powered by a 100 hp Mercedes D.I six-cylinder engine cooled by side radiators. The monoplane wings had ailerons, not wing warping. The rudder was a single structure above the fuselage, the tailplane had elevators and fixed stabilizers, and the undercarriage had two wheels. The fuselage was rectangular and made of wood.
  A few examples were built in 1914; one known military serial number is A. 164/14.