Hi,
The prop is actually a 10 bladed prop shop special that runs in a cone, unfortunately when I built her you could not get any info on that part of the boat, it was still top secret stuff but I get a hell of a lot of thrust out of that prop and it doesn't get clogged either..
I sail her regularly and she still performs well, needs a bit of a re-paint now, I have admired the ally propulser on you build,,,,,,may have to get one of those thingy's.
They are rare which is good as not every one has a V boat, They are instantly recognisable though to anyone who knows and I have had people come up to me whilst sailing telling me they served on one which is great.
May you always surface the right way Up !
Regards Sub.