"Lloyd E. Sponenburgh" wrote in message
news

"Cliff" wrote in message
...
On Thu, 14 Jul 2005 19:28:11 -0700, "PrecisionMachinisT"
wrote:

Never forget that a simple 'propellor' is nothing more than a simple
screw.........

There is lift to be considered.
The simple sheet metal ones differ I think G.

Cliff is right. A water propellor, better known as a screw, IS a screw.
It
works in an incompressible medium.

But an air propeller is better viewed as (and actually IS) two wings
operating in rotary fashion.


Go back and read carefully, as this is exactly what I was saying, too.

--

SVL