Scratch all that...A bit more progress...
The main tube seems a little narrow, but a pair of glasses fits in just about the same as on the actual prop.
A few things to consider:
--I think the actual prop may have been slightly fatter in diameter but not a lot, and not nearly as much as the next sized tube
--Many shots of the prop are 3/4 shots, shortening (and fattening) the tube
--Adding the fins and completing the rocket will "fatten it up"
--I've anticipated and accepted that not all proportions will be dead-on accurate
After further studying the original, my conclusion is that the spike is not a whole lot fatter than a standard pencil. Coincidentally, that is not too far off from the 3/8" esitmate.I have this laying around from a previous project. Cover shipping and it's yours.
It's 3/4" in diameter and about 5 inches long. I knew saving it would come in handy...