how much can your plane weigh, or how much thrust does the motor produce?
very different answers depending upon the type of flying you want to do.
regrettably, FT does not post any real number about their new motors so unless you want to do your own bench tests, you have to rely on others who may, or may not have a vested interest.
don't quote me, but the B-pack i would guess around 800g thrust, 1,200 maybe on the C-pack. of course that again can vary greatly depending upon the prop used, and the quality and cell count of the battery.
what ya thinking about trying?
laters,
me