The Focke-Achgelis Fa 330 Bachstelze (Wagtail) was a type of rotary-wing kite, known as a rotor kite. They were towed behind U-boats to allow a lookout to see further. They were stored in a cannister and assembled by the crew, then broken down again after the flight. About 200 were built by Weser Flugzeugbau. For more, see my Facebook group - Eagles Of The Reich













