The high Kv sibling in the R5 series, sent over by Brother Hobby for testing.
Again it is very interesting here to compare the 2306 with the Multicopter Builders 2207 2650kv motor, given the similarities in the design of these. Unfortunately it tested a bit lower than the 2207 variant, so the results aren't directly comparable with the stator size as the only variable, but they're still close enough to be interesting. The lower Kv here is pretty clear in the energy requirements, with a pretty decent rise in efficiency across most of the props. The power output is also lower, but still extremely respectable, especially given this motor comes in under 29g due to a few less turns on the windings than the R5 2450kv. On heavy 5" props this motor barely breaks 40A, giving very similar current numbers to the R3 2207 even though it is quite a bit higher Kv. Given the low weight, high torque, and solid power, this motor is a very viable option for a range of applications with the appropriate proping, especially in the light weight racer category.