Hi I agree a nice brass prop sets off a model. You have to make sure the sort the prototype model has as there are so many. Prop Shop now taken over by Protean say they have 1000 designs and sizes.
I went and did a count up of my spare props a third of them are brass and more than a few paired contra rotating ones. I categorize at or below 40mm as small of which there were 85 and large up to 60mm 60 odd then there are about 20 boats so rarely short of a prop.

I do use them for testing the right prop to motor configuration for a new model. So not just sitting there.
regards
Roy

Just a standard washer, I use a brass one!

Thank You.Just what is a thrust washer?

This is the way I lock my brass propeller on my 4 foot RAFfire
Boat with no problems.

I usually use a drop of contact adhesive after thoroughly cleanimg the thread area, never lost a prop after that treatment!! And, the prop is easy to remove.

That Definitely Works!👍👍

There are numerous ways of ensuring retention of your wheel. All are applicable.
Mine is to file a flat onto the shaft. This is done after drilling a hole and threading it, in the hub of the prop, for a set screw. Thread the prop onto the shaft and mark the shaft thru the hole. Make sure to have tightened the prop snuggly. File the flat at the mark. dress the shaft. Install the prop, I use a low tension thread lock here as well. Align the hole with the flat while the tightening the prop. Apply thread lock to the set screw and tighten. It should hold pretty good.

Well Said👍

I always use locktite and a lock nut. Along with a thrust washer between the nut and the shaft end.
Works for me!