Crazy robot idea for this year 2

[PAR_WIG1350]

Originally Posted by EricH

It depends on the prop, and the air density. Quite possibly even the specific prop. The one overarching question which won't be answered by motor power is prop thrust--motor power is good for getting that thrust, but can't be precisely correlated without some testing. A 27x13 is quite a hefty prop, even for a hefty motor like an FP.

And I've seen a case where the same prop tested at two different thrust levels in two different locations. Not fun trying to figure out why...I suspect it had something to do with either the air density or a mounting change, or both.

Well, air density at FIRST venues, which are often climate controlled and at fixed altitudes, shouldn't be too hard to calculate, plus the mounting won't change as long as it is on the robot. Additionally, the same website also sells 26, 24, 22, 21, 20.5, and 20 inch props in varying pitches.

Does anyone have performance data from 2009 for similarly sized propellers?