If I didn't know better I would say we are looking down on a wing pylon mounted engine...but if that were the case the aircraft concerned appears to be in the process of doing a loop, which is not something one would normally associate with such aircraft....so wild guess, A-3 Skywarrior?
Edit, 2nd thought...no, the pylon is wrong.
Last edited by skytrain10; 6th February 2012 at 13:14.