"trainfan1" wrote in message
...
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?

1. Blade thickness.

2. Blade flex.

The SS prop has the advantage in both categories and is therefore more
efficient.

The downside is that if you hit something you will end up doing some serious
damage to your lower unit vs. an aluminum prop shedding part of its blades.