prop ratings

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!