There was such a
backward firing WGr21 experiment using the Fw 190A (called Krebs-Gerät), but it was deemed an operational failure.
Here's a foto from our own Neil Page:
http://ourworld.compuserve.com/homep...vyweapons.html
For those interested in the subject, there are some 15 pages covering Krebs-Gerät Fw 190s in:
Focke Wulf
Jagdflugzeug
Fw 190 A - Fw 190 "Dora" - Ta 152 H
Peter Rodeike
Struve Druck, 1998 (?)
ISBN 3-923-457-44-8
EDIT: original post edited as correctly pointed out by FalkeEins
Last time I'll use a quick google search to put up a quick example!!
