Where can I look for a brass or plastic 1/720 4-bladed ship propeller?

[Monty]

Asking for a friend, as I know nothing about model ship stuff.

I hope I heard him correctly about the scale, but if it helps, it would be about 5" across in 1/25 scale.

 

[peteski]

While you are waiting for possible answers, either you or your friend might do some searching yourselves:

https://duckduckgo.com/?q=model+ship+propeller&t=h_&ia=web

Or even narrow the search to "4-blade model ship propeller".  The size you mentioned scales to about 0.25" diameter in real dimensions.  That is tiny (but so is a 1:720 scale ship.  Maybe search for "1:720 scale 4-blade propeller" to further narrow the search.

[JollySipper]

Fishing lure?

[Chariots of Fire]

Try the model ship builder's guild.  Also Model Shipways can probably help you out.

[jacko]

Try the Steelnavy.net and/or modelwarships.com sites. 1/700 will be easier to find but for most is close enough.