Focke-Achgelis Fa 330

Overview

The Focke-Achgelis Fa 330 Bachstelze (English: Wagtail) is a type of rotary-wing kite, known as a rotor kite. They were towed behind German Type IXD2 U-boats during World War II to allow a lookout to see further. About 200 were built by Weser Flugzeugbau.