RE: F27 STRYKER,WAY PAST THE LIMITS!
Voodoo,
Thrust is checked with a scale. Put nose on scale,zero out scale, and go WOT.
But don't hold for long, it's hard on motor with no cooling air flow. This will give static thrust.
Also watch for spinning prop, they bite.
BJ
p.s.
I did a quick check on Motocalc, You didn't say which prop, so I ran 3 most common. with your set up.
MAS 16.6 thrust, 16.4 amps
APC 17.0 14.6
Grapner 17.5 15.3
What Esc are you running, even with a 25 you can step up to a 7X6 and still be in the ballpark.