Here's what I got:

An 18 X 10 APC at 8000 puts out about 28.22 Lbs of static thrust.

An 18 X 16 APC at 8000 puts out about 28.22 Lbs of static thrust.

Only difference is the speed and HP.

This doesn't make any sence to me. The way a helicopter blade makes more lift/thrust is by increasing or decreasing the pitch. It only seems logical to me that an 18X10 would put out MUCH less thrust than an 18X16 at the same RPMs. This makes me wonder how accurate thrust HP is. Please clarify.

Thanks.