Chaps,
WR is right,
once stopped the prop on my Cub won't spin from a VNE dive (which is only 100mph). If I had stuck the nose down in the first place, rather than pulling back to convert energy into height perhaps the prop would have continued turning... don't know!
What I do know is, with the much heavier metal prop on the T-craft it was pretty much impossible to stop the prop whatever you did speedwise.
Oh the fun you can have with your own planes and a deserted airstrip..!
Kingy