From: x planes
the Focke-Wulf Fw 860 tailsitter concept – designed to meet the requirements of West Germany’s Bundesministerium der Verteidigung (BMVg, “Ministry of Defense”) for a high-altitude supersonic fighter-interceptor in 1957.
image via the legendary Josef Gatial, diagram via the AIAA V/STOL archives
(see also: The Grumman Nutcracker)