Trying to identify these propellers.

[AndyWiltshire]

Hi.
I inherited these two propellers a few years ago and I don't know what they are from.
There is a very slight possibility that they might be torpedo related.
Any ideas?
Thanks.
Andy.

[Big Al.]

IIRC they are off a yacht of some description, when you power them up they spin out and act like a prop, when you power off they slip back to become streamline when not required under sail.

[Slushbox]

^^^^

This. 'Folding prop'. Used by sail boats. Arrived in the 70's. Those look like the sort of prop from that era.

There might be a pitch number stamped on it. The Yacht fora will have more details.

[AndyWiltshire]

Thanks for the helpful replies.
I thought that they were probably from a yacht or similar. What put some doubt in my mind was that my late father did a lot of work on torpedoes, they are of the very highest quality, and the input shaft doesn't appear to match a drive shaft from an engine.
I'd previously shown them to an experienced professional boat building neighbour and he'd not seen them before.
Andy.

[Scrump]

What does the end of the shaft look like?

[Krikkit]

Wouldn't really make sense to have a folding torpedo screw, they're not really for coasting.