This is the high KV sibling of the 2300kv RT2205 motor, sent over by Gemfan for testing.
Check out the full list of motors in this series here
Published: Sep 5, 2016 by quadmcfly
After the positive impressions of the original RT2205 motor I was expecting good things from this higher KV version, and it definitely didn't disappoint. Build quality is identical to the 2300kv version, in fact the only thing that is different is the turns in the windings to adjust the KV up to 2700kv. The machining and bearings are excellent on this motor. Again my only complaint here is the weight. With some 2205 motors coming in at 24.5g with short wires, an equivalently powered motor weighing in at 30g is a significant rise. Essentially by weight class this means the RT motors are competing with 2206 and even 2207 motors. Also the weight on a high KV motor like this means it adds a good deal of weight on 180mm class builds, which is really a place where it shines performance wise. In all other terms though, this motor is extremely well executed. Tolearances are tight, and there was no vertical play present.
This motor is a real powerhouse! It threw out some really great numbers, running roughly equivalent to the Emax RS2600kv motor. Interestingly the RT 2700kv gains in response times, but seems to draw significantly more amps for the thrust than some of the other high KV motors that have been tested. On 5x4x3 it really showed a significant rise in current, hitting around 36A peak compared to about 33A peak that would be typical. Given the current draw, it seems the best prop for these motors is likely to be the 5x4.5 HBN style prop, as the current was very reasonable at 32A peak, thrust was not significantly less, and RPMs/pitch speed are higher. This should be a wicked fast motor on that setup. The basic conclusion here is this will be a wicked fast motor on the right prop, but watch your batteries!