I had forgotten about this post. I don't get on this site that much. My Bronco project was on hold last flying season. I got 3-bladed 9x7 pusher and puller for it. Using 850kv .25 equivalent motors on 4s. The specs for the motor says it will spin 10" to 14" prop. I believe I got room for 11" prop if I need larger prop. I put retracts on, added Hanger 9 pilots that move their heads w/rudder. I delayed the project until I did research on the long esc/battery wires dilemma. I decided to keep the esc/motor wires short, (for cooling of esc), battery wires are about 14" long. Weight w/o battery (if memory serves me right) is 6lbs. 6oz. I'll double check that.

Anyway, the counter rotating props look great. Amp draw seems ok. Haven't maiden yet, however, the thrust appears very good.