Emax RS1106 7500kv
The highest Kv option from the Emax micro line-up.
The 7500KV version is the most disappointing of the line. Suffering even worse efficiency than the 6000KV version mars what would otherwise be a pretty nice option for 2s builds if the construction was on par with the 4500KV motor. This motor also seems to not take high loads as well as it's lower KV siblings, giving a shallower torque curve at full throttle than the rest of the lineup. On 2s this motor is comparable with the 4500kv version on 3s, giving a little more thrust with very light prop loads, and a little less thrust with very heavy prop loads. As with the entire lineup it seems to best match a prop load similar to the 3020 biblade, which leaves you running just above the sweet spot of efficiency in static loads, and should give a good spread of efficiency once unloading kicks in in the air. Heavier prop loads like the RotorX 3044 are starting to push the limits of the motor in a static test, drawing around 140 watts, and would rely heavily on unloading in the air to keep power draws down.
calibration report - most recent dyno calibration at the time this test was run