[mcsparkie]

The propellor is also an airfoil. The "faster" airstream on the front side produces significant lift.

Ooops...You just said the same thing as that the vacuum on the front is sucking the propellor forward!

[cinFLA]

Ooops...You just said the same thing as that the vacuum on the front is sucking the propellor

What do you mean: "Ooops"?