The Brison web site claims 26 lbs of thrust with this engine. Of course, who knows what prop combo that might have been on. I'm sure that the thrust with the 22x8 is easily over 20 lbs by the way my stinger flies.

Krazyc; What is the difference between the 2 props you mentioned? Is the 21x10 better for 3d?? - why? I've been propping for best verticle, and I'm wondering if there'd another reason to use a higher pitch.... Better response??