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• Lumenier RX2205 2400kv

This new 2205 is the latest release from Lumenier in their RX line of motors. I decided to include this motor with the 2300kv shootout even though it is significantly higher KV, simply because the performance matched so closely with the other 2300kvs.

Check out the full list of motors in this series here

Summary

As with all the Lumenier motors that have come across the bench, these are very well made when it comes to structure and physical properties.  The machining is excellent, and the smoothness is unmatched.  The windings look fantastic, with fairly large guage single wire winding.  If there is one thing Lumenier excells at, it is making light motors, and this one is no exception. With short wires it weighs in at under 24g,and with the stock length it only weighs just over 25g.  That makes it one of the lightest 2205 motors we've seen.

Now on to the bench results!

Test Results

Despite the excellent build quality and light weight, this RX2205 suffers from some of the same issues that the previous Lumenier motors have had.  Power on this motor was well below most of the modern 2205 motors on the market, and transition speeds suffer similarly. The closest match for these was the original Cobra 2205 2300kv motor, and the ZMXv1 2300kv.  On the positive side, while this motor won't deliver the punch that the other motors out will deliver, it certainly won't drain the batteries like the modern batch of beast motors will.  While the motor isn't really any more effcient in terms of grams per watt, because of the lower top end it has a much lower peak amp draw.  Interestingly enough this motor matches the peak thrust output of the RX2206 2350kv motor almost exactly on the 5x4x3, but has much slower transition speeds.  It has slightly more thrust than RX2206 on the 5x4.5HBN dual blades, but again, has a slower response time (almost 40ms slower settle time on that prop).  As with the Lumenier RB2204 "Skitzo" motor, I'm going to suggest heavy 4" props will probably be the best application for this motor.  The transition speeds there are not significantly slower than the modern batch of 2205 motors and significantly faster than the 2204 motors thanks to the decreased loading of the 4" props, and the thrust difference is also much less. Combined with the relatively low weight of this motor, it seems like the natural application.  For 5" props the RX2206 2350kv seems to be a more ideal motor, even with the slightly increased weight.