ORIGINAL: krashkart
Yes it showed pretty much what I got on the watt meter which believes me to thing that the specs for the E Flite Park 450 are incorrect within that program?
The props being tested are G/F Series 3 Master Airscrews I picked up at the local hobby shop.
I did some more testing which some of the same brand/series I have and found that the10x6 is almost perfect for the continuous amps of the motor at 14.6 amps and 174 watts and a 10x7 was 15.9A and 188 watts.
Weighing the plane, a Mini Ultra Stick and then doing some math I find the watts per pound to be the following:
10X6 Prop 108 W/#
10x7 Prop 116 W/#
10X8 Prop 141W/#
Interesting to see the differences anyway.</p>
So far your cost has been whatever those 3 props cost you.
What I'd do next is buy a couple more props. Any other brand 10x8 and an 11x7 or 11x6. Or do what all of us at the field do, borrow them from somebody.
Fly the 10x8 until you get the 11"ers and you'll have a better feel for how the next best test prop works in the air.
I've never felt I could get a better answer from a formula or app over what I could do with some time, good weather, and a flying field.