It had a modified fuselage and a single vertical fin (in comparison to the basic model's three).

The Finnish Air Force purchased one FF.41at aircraft from the Germans in Estonia on 26 November 1918, at the end of World War I.

In 1922, the torpedo-carrying fuselage was changed, and the capability to carry torpedoes was removed.

One of them was purchased by the Finns, and the other two in bad conditions were re-built as a new functioning one, which stayed in Estonian service.

[citation needed] Data from Flugzeugbau Friedrichshafen GmbH,[2] Thulinista Hornetiin – 75 vuotta Suomen ilmavoimien lentokoneita[3]General characteristics Performance Armament