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DYS SE2008 2550kv Full Results  [CLICK HERE]

 

This is an new motor DYS sent over for testing that takes a look at new stator size I've not seen before.

Check out the full list of motors in this series here

Summary

Published: Sep 5, 2016 by quadmcfly

DYS SE2008 2550kv

Tested KV:2550kv
Weight:33g
Stator W:20mm
Stator H:8mm
This motor was a real curiousity.  The 20mm x 8mm stator size is one I haven't seen before, and I was very curious as to what the properties would be.  In terms of build quality this motor is on par with the other DYS SE offerings.  The  bearings are quite smooth thanks to the 4mm shaft size, and the steel shaft is a great feature.  An interesting note here, is that the shaft on the newer SE motors is not fully hollow like the first ones.  If you look down in the top you can see it is only hollowed out about 10mm deep.  This is not a major issue other than the weight, but it is interesting to see the change.  This motor also has the typical screw holding the shaft in place on the bottom, as well as the other typical design features of the SE series motors.  Red seems to be a popular color for motors, and it looks great here.  The only negatives I found were the motor I was testing developed some vertical play, and it's quite heavy weighing in at 33g with the factory wires.  Stripping the wires down can get it to about 31g, but still quite heavy.  The bearing issue should be fairly easy to fix however, and given these were early release motors, I'm not certain it is reflective of the shipping quality.

Results

There were definitely some interesting results here.  Given the increase in stator size and decrease in daimeter I was very curious to see how the perfomance would reflect those changes.  I actually misjudged the motor a bit the first time and ran the tests on the prop sequence I use for the 2205 motors, which includes more 4" props and fewer 5" props.  After analyizing things though I realized the weight of the motor and the relative efficiency and high output gears it more towards heavy 5" props, I reran the test on sequence I use for heavier 2206 and up higher KV motors.  The 2008 stator size appears to give quite decent torque and good response times while still providing fairly decent relative efficiency.  In fact it almost exactly matches the N52 class 2206 high KV motors in response time, but beats them in efficiency, at the cost of a few grams of weight.  Overall this stator size has some interesting outcomes, and I would be very curious to see more pursuit of this in the future.  In particular this motor appears to be an excellent performer in terms of output and efficiency if weight isn't a major issue for your build.  It's also worth noting, the slightly lower KV relative to other motors with similar output may result in a slightly lower pitch speed when unloaded in a dynamic environment, especially when the craft has a very low AUW.  The torque and response of this motor really make it ideal for heavier 5" props where it can put it's strenths to the best advantage.