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Multicopter Builders Primo 2207 2650kv
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The high Kv version of the MB Primo 2207 motors.

Check out the full list of motors in this series here

Summary

Published: Nov 22, 2017 by quadmcfly

Multicopter Builders Primo 2207 2650kv

Tested KV:2690kv
Weight:30g
Stator W:22mm
Stator H:7mm
Multicopter Builders has a history of speccing great motors, from the original R3 based 2206 and 2207 motors to the new Primo 2450 Kv sibbling of this one.  This higher Kv version is essentialy identical to the 2450kv except the number of turns, so take a moment to read through the comments on that motor and lets get right to the results.

Results

This motor is a solid setup up in power from the 2450kv version, but surprisingly tested a bit higher Kv than stated, coming in one of the highest Kv large stator motors at 2690kv.  That is almost within the tolerances of winding variance from 2650kv, so quite acceptible given the difficulty of reaching an exact Kv with the limited number of turns.  The results here are quite impressive, especially for the light weight of this motor.  The 2207 stator gives it plenty of torque for swinging even heavy props, though the high Kv comes at current cost. Overall the efficiency is quite reasonable for a motor of this Kv and stator size, especially on the mid weight props like the 5x4.3x3 v1s and the original 5x4x3.  Even on heavy props this motor has no trouble, just breaking 1600g on the Buttercutter and Cyclone 5046, though at well over 40A, that won't be sustainable for more than short bursts.  At just 30g this motor is a light weight powerhouse given the right application.