Whats the difference between a 10x7 prop and a 10x6? The first number is the prop diameter? whats the second? Thanks ahead of time...
prop ratings
Sep 17, 2003
13 Replies
Pitch. The distance the prop would move forward in one revolution in a perfect world :-)
The second number is "pitch". It's the number of inches the prop would move through a SOLID in one revolution. In actual practice, there's a lot of slippage and it doesn't move nearly that far.
Smaller diameter/higher pitch props are for higher speed at the sacrifice of pulling power. Larger diameter/lower pitch props pull more, but the top speed is limited. It's like high and low on a car (respectively). Dr.1 Driver "There's a Hun in the sun!"
Great analogy Driver!
The way it was described to me best was the number of inches the prop would move in one revolution in say, a block of butter, or wax.....kinda silly sounding, but it helped me understand.
-Nick
Makes perfect sense. Thanks
I tried rotating a prop through a solid concrete block. It broke.
What am I doing wrong?
Confused of Candleford.
I regularly perform the same experiment, but using ordinary dirt - as found at the local flying field.
Russ.
You have to use a concrete prop for a concrete block. :) Dr.1 Driver "There's a Hun in the sun!"
Ever tried wood, as in a tree? That works well, too. :) Dr.1 Driver "There's a Hun in the sun!"
So a wood prop would be ok for a tree then. Ya live and learn.
Kevin
Carbide works better.
Dan
Some of the CF APC's are tough enough!
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