Yes, the early Spit prop was a hefty wooden affair. Yours could well be relatively modern, and to be honest, I doubt I could positively identify it, but if you can post the length, tip to tip, and the diameter of the boss, and any data which should be stamped on the hub casting, someone here might be able to shed more light on it. It does look about the size of a Chipmunk prop, and a similar shape though.