On the destructions they say
7,200 on a dynathrust 20x8, 8.5 kgs static thrust.
8,100 20x8,top flight prop,9.0 kgs. static thrust.
7,300,20x10, Zinger 8.5 kgs.static thrust.
These are all approx. Sounds like the Top flight is the winner with almost 20lbs. of thrust
Practical rpm,1500 - 8000
Don't know if this helps but good luck..
Frank