seanychen-RCU:
I'd imagine with APC 15x4W it would turn 10500, at least 13.5 lb. of static thrust.
Here is a number for you. Rapala dig. fish scale... saito 100 15-4w apc prop.... 15% wildcat.... rpm 10300.....Static thrust was measured at 10lbs 5oz.
Looks like the thrust calc. is just a bit optimistic
Hope this helps
Al