"Well said Bill
Aluminum p
"Well said Bill
Aluminum props are cheap, they have flex issues (thats why you never see them in high performance situation).
However they will act as a safety valve in most occasions and will cause their own demise by absorbing the the forces created in a high speed impact before those forces can be applied to the gearbox.
You can do yourself a little test, if you can find a bit of aluminium and a bit of stailess the same size, say a couple of feet long, then using the same force holding the two pieces in each hand strike something hard with them, if you compare the jaring sensation you get between the two metals the stainless will be greater, the same type of force is applied when your prop hits something submerged in the water.
Thats why aluminium props break and stainless props break things they are attached to.
Stainless is great as far as I am concerned as long as you do not hit anything, the only other problem that can be associated with stainless props is a possible increase in galvanic corosion.
As to wether you need to go down a size in pitch or not if you go to stainless you first need to decide is there a problem with the pitch you are running now, is it the best for your particular application.
Cheers
Peter C"