Okay - I can see what you guys are talking about. To me, though, it looks more a couple sets of "grabber arms" from the inside of a Star Destroyer docking bay. That said, I do see why it could look like a propeller to someone else. Even though I can see why you would think it was a propeller, I remain unconvinced sir. I'll dig up some more pictures later and see if we can shed any more light on it.