Steve Barker wrote:
You all can twist the facts all you want. Pitch is pitch.

No, it isn't. A thinner blade will travel further each revolution. A
fatter blade(aluminum) of the same will disrupt the water flow and not
travel as far.

In theory, a
given pitch goes xx inches through the water in one rotation.

Now you're mixing your "facts" with theory.

Given this,
the stainless and the alum will do the same inches in one revolution.

No, they won't. You're leaving out too many variables.

Until, that is, you put some power behind it and the aluminum flattens out a
bit.

No, it won't. The slippage you "see" is due to the blade cross-section
shape & design, not the blades flexing(until you get into composite
props). Props would be breaking all the time from fatigue alone if they
gave enough to even slightly affect pitch.

Thus the higher rpm for the same pitch.

The slippage you "see" is due to the blade cross-section shape & design,
not the blades flexing(until you get into composite props).

You can cup this and cup
that,

What about rake, leading edge & trailing edge designs, blade surface
area & thickness, diameter, blade contour & # of blades? Do you really
think pitch is all there is?

but the fact is the aluminum flexes and loses pitch. Period.

Prove it. What are your sources?


Rob