Aviatik (Berg) Dr.I

The Aviatik Berg Dr.I, AKA Aviatik Berg 30.24 (designation which indicated that it was the 24th experimental airplane produced by the Austrian Aviatik) was a single-seat fighter triplane designed by the Austrian engineer Julius von Berg which was completed in May 1917.

It used a similar fuselage to that of the Aviatik Berg D.I and a similar structure too. It was powered by a 200hp Austro-Daimler engine and was armed with two 8mm Schwarzlose 07/12 machine guns. It's also worth to mention that it was one of the first airplane to feature contra-rotating propellers, a propeller configuration that wasn't well developed until the 1950s.

 

The Dr.I with it's contra-rotating propellers

Anyway, when it was tested, it's performance wasn't much better than the Aviatik Berg D.I and therefore only one prototype was built.

Sources:

1. Salamander Books - The Complete Book of Fighters

2. http://www.airwar.ru/enc/fww1/aviatdr1.html (translated)