I don't know why, but for some reason i got a pirate-y like feeling from this O.o
Melody is nice, and there's a lot of variation thanks to the second melody. The intro is also straightforward, so the ending isn't that bad really.
At first it sounded a bit distracting though. Maybe it was in fact because of the fast intro. I got a hold on it quickly nevertheless.
I could imagine this being used as a loop (without the silence at end it actually loops pretty well) in a hangar or on an airfield of some sort ^^