ORIGINAL: rjm1982
Jim,
It was the Hillson FH.40 ... a modification to the Hawker Hurricane
Top wings had internal fuel tanks, used for long flights, and when the fuel tanks were empty, the entire top wing could be jettisoned...
[link=http://www.jaapteeuwen.com/ww2aircraft/html%20pages/HILLS%20FH40.htm]Clicky Clicky[/link]
It does say in the data that the wing was never actually "slipped" in flight. I wonder if it might take the tail off?