In the town I used to live in, we made our own "Cruise Missile", & mounted it to the top of my truck. A 5" PVC body, the nose was the float from a stock tank waterer. The wings were made from an old aluminum "Flooded" sign. Got stopped by the CA Highway Patrol. He really didn't know what to do, as we were doing nothing illegal. Let us go, with a warning to "Stop being so wierd!!"