Hello Ken!
On 09 Dec 95, Ken Ellison wrote to Donald Blewett:
 KE>   I have the Tower Hobbies catalog.  The confusing part I guess is
 KE> that even the catalog gives three different size props for each
 KE> engine.
 DB>> You will have to experiment a little to find just the right size
Look at the pitch like gears on a car.  Lower pitch doesn't 'screw'
it's way through the air as much with each revolution, so it doesn't
load the engine as much.  Like low gear in a car, acceleration is
better, but speed tops out rapidly as the engine reaches and holds
it's peak RPM.
A higher pitch is like a higher gear.  Engine loading at low speeds
is greater, but since it takes a bigger 'bite' of the air, high
speed is enhanced.
C-ya! Rich
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