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• LDPower FR2206 2200kv

I've been waiting to try to finish up some of the other motors on my bench before I started the larger stator, lower KV motors, but I finally gave up and decided I better start working through them beofre I got too big a pile!  I've also added a number of new props for the lower KV tests, focusing on the heavier 5" props and adding an additional 6". I've also removed the 4" props and the 5x3 from this run, as the load is insignificant on these motors.  

This motor is the first in the series.  This is the first motor I've tested from LDPower.  The motor is smooth and the machining quality is quite good. The bearings feel good and there is no slop.  There are a couple of issues with this design that I see. The primary problem is that the prop shaft is far too short.  The only way I could use the motor was with the provided bullet nut, which is very problematic for the way most of us use miniquad motors. The other issue has to do with they physical design.  There are lots of really intricate slots around both the base and top of the motor, which makes the metal in those places thin.  The whole thing looks a bit delicate, and looks like it will not hold up to abuse.  Other than those two physical issues, everything else looks great.  The windings are well wound, everything in the motor looks clean.  I think with some changes to the physical design of the bell, the motor would be very solid.  It seems that most of those changes have already been made in the version that is hitting shelves, so that shouldn't be a problem!

Results

The numbers here are interesting. The scale up to 2206 has clearly done good for power.  It seems the extra one mm of stator height has allow the LDPower motor to slightly surpass the 2205 motors with N52 class magnets and very tight air gaps using only N45SH magnets and an average air gap.  It has gained about 30g of thrust almost across the board at only about a 1A gain in current draw.  The extra stator height should also make this motor a bit more responsive on the low end of the throttle as well, especially on heavier props.  Overall the performance on these was quite good.  On a 6x4 prop the LDPower really shone, easily clearing 1400g sustained at only around 30A.  6x4.5 seems to really be in general a less efficient prop, giving lower RPMs, slower response, less thrust and higher amp draw, so the 6x4 really seems to be the optimal performance for this motor.  For 5" props, the 5x4x4 prop seems to be the go-to, with quite fast response, decent thrust, and decent efficiency.  The 5x4.5x3 HBN is a close second, and losses only in terms of response time.  In all other metrics it is suprisingly close to the 5x4x4.  For a bit more efficiency, and a bit faster response, the 5x4x3 is a good second option on 5" props.