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- Cobra Champion CP2207 2300kv
This is the (very) big brother of the CP2205 motor already tested, matching KV but going for a much larger stator size.
Check out the full list of motors in this series here
The reboot of the Cobra line in the Champion series has shown great success so far in the CP2205 motor, and this 2207 edition looks to continue that trend. The build quality here is essentially identical to the 2205 counterpart, excellent machining, tight tolerances, and smooth bearings. The air gap is not quite as tight as some of the other motors that have come across the bench and the magnets are standard square magnets not arc magnets, but it seems to be compensating in other ways as the results don't seem to be dramatically impacted. As with the CP2205, the windings are two-wire and fairly thick gauge for multistrand, giving a good combination of current handling capacity and cross-sectional area in the wind. The only real complaints I have about the design are the weight and the 3mm internal shaft. The motor comes in at 35g, basically matching the T-Motor F60 but well over several of the 31-33g 2207 motors currently on the market. The weight may make the motor less than ideal for certain types of flying, and while for some pilots it may not be an issue it is definitely something to be taken into account. The 3mm internal shaft, especially on a motor the size and weight of the 2207 is some cause for concern in terms of long term durability of both the bearings and the shaft. How much of an issue that becomes will require flight time, abuse, and a broader adoption rate to discover however. If the rest of the design is handled well, it may not be a concern.
NOTE: This motor is one of the first motors tested on the new power supply equipment. If you haven't already read the write-up on the MQTB Facebook page, it gives a good deal of information on the thought that went into these changes to the testing equipment. As a result the numbers here aren't going to be 100% comparable to the other motors that have previously been tested, but they will still be close enough for valid comparison. The numbers on the new tests will be a bit low on the lighter props compared to the older tests, evening out on the heavier loads.
The results here were quite impressive. This motor came remarkably close to the F60 2450kv, the current king of thrust numbers. One thing to note here is that even though the thrust numbers are a bit short of the F60 the current numbers were about the same, though the numbers were on par with the ZMX Fusion X25 2300kv. The torque on this motor is excellent, however. The 2207 stator gives some really great response times, showing some decent gains over the X25 on the heavier props. In terms of RPM/Thrust output this motor falls just between the ZMX Fusion X25 2300kv and the T-Motor F60 2450kv. Overall another very solid motor from Cobra on this one.