This is the next in the KV line of the Cobra Champion 2207 series of motors, stepping up a bit from its 2300kv brother.
The Cobra Champion line has represented a major re-birth for Cobra, and some great performance has come from it so far. This 2450kv verson is a bit of a KV step up from the 2300kv already tested, but otherwise the build and design is identical. What is really interesting here is how the change in KV impacts the results.
With the 2300kv version of this motor showing power similar to 2206 class motors, but excelling in efficiency, I was curious to see how the higher KV of this motor would impact the results. The numbers here are about what I expected, showing a significant power increase, but a matched rise in current draw. The KV rise here is really an excellent balance. It creates enough power to generate some good RPMs and thrust, but not so much to eliminate the heavier props, and drive current up to an unreasonable level. What is really impressive here is that it retains the relative efficiency of the 2300kv variant. The most notable result here is well over 1800g of thrust on the KingKong 6x4 at only 41A. While that may not be horribly practical for extended high throttle, comparted to some of the other motors hitting that amp draw and more, the output is very impressive. Unloaded in flight with a bit more careful throttle management, I would expect that combination to yeild some very impressive performance with the correct battery combination. This trend is continued down into the heavier 5" props, where the high torque of the 2207 stators makes for some really impressive numbers, and very fast transition speeds. Overall this motor is quite an impressive balance of power and efficiency. My concerns about the weight at 36g, and the 3mm shaft and bearings remain, but depending on they needs of the pilot those issues may or may not be high priority.