Just built one of these over the weekend with j250 on 3x3 prop first but my 7 cell NiMH pack was just a bit too heavy to get a good climb rate... So I was eyeing a Jia Bao (himaxx 2025-4200 clone) BL motor I got in a trade and swapped that in on the same 3x3....
According to my scale and software ocilloscope I'm getting a little over 8oz static thrust at roughly 23k rpm and the AUW of the plane is 9oz.
Maiden today with that power setup was a bit frantic
12mph wind gusting to 17, no problems cutting through the wind or climbing, but that downwind turn was a handful
The j250 was fast but this thing is a missile now
Can't wait for a nice calm day to try it... bit easier on the nerves