No idea at the moment. Was thinking mounting plate for wingtip tanks on an F104 but there's no facility for plumbing...so thats wrong for a starter. Its the wrong shape for a control horn on an aerobatic jobbie and its not the rear fin on a Westland Wasp / Scout. Even been looking at WW2 guided bombs like the Fritz-X but I reckon I'm on the wrong trail there as well !. Heck, I'm even thinking its a UAV of some sort
In short, I havent got a bl**dy clue !!
This one needs some serious thought. It's a good'un !