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Proton-X 2204 2750kv
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An ultralight motor in the Proton-X series from MultirotorParts.

Check out the full list of motors in this series here

Summary

Published: Jan 23, 2018 by quadmcfly

Proton-X 2204 2750kv

Tested KV:2710kv
Weight:21.2g
Stator W:22mm
Stator H:4mm
I've been curious for a while about the trend back to ultra-light 2204 motors, and this offering from MultirotorParts gives a chance to see how these smaller stator motors fare when combined with the current trends in motor design from the larger motors.  This 2204 weighs in at just over 21g and comes with all the bells and whistles of its larger siblings: strong arc magnets, tight air gap, hollow Titanium alloy machined shaft, and single wire windings.  Combined with the light weight and high Kv that makes this motor interesting in a number of applications.  

Results

I was very unsure of what to expect with this motor.  The Scorpion 2204 2700kv has been on the bench recently, but was a bit of a different approach, adding weight in terms of heavier and taller magnets and heavier overall design to gain performance for the small stator. The Kv of the Proton-X tested a bit higher than the Scoripion at just over 2700kv.  Given that some of the weight loss of the Proton-X comes from the smaller magnets, the performance here is fairly remarkable. It does particularly well on light props, like tri-blade 4" and dual blade 5", where the higher Kv gives it an advantage, though it still holds its own on the heavier props up to the original 5x4x3 design.  The lighter design shows up in a bit of efficiency loss higher in the throttle as torque is being compensated by incraeseing Kv in order to generate thrust.  Given the extremely low weight of this motor, it will excel on ultra-light builds with a total flying weight approaching 450g or lower.