Doug Kanter wrote:

Just sort of lurking in this conversation, but if a stainless prop and an
aluminum one were exactly the same dimensionally, why would one perform
differently than the other? Friction differences due to surface
characteristics?

Stainless steel is STIFFER than the aluminum prop and will outperform
it. Also, aluminum props ding up much easier than steel props. Stainless
is the way to go.

--
Skipper