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Catalyst Machineworks Freedom HV 2205-1750KV
 Full Results  [CLICK HERE]

 

One of the first 2205 motors marketed toward 6S power systems, with a design focused on balancing performance, durability, weight, and cost. Oh, and it happens to put out more thrust than any other 2205 motor tested to date.

Check out the full list of motors in this series here

Summary

Published: Nov 5, 2018

Catalyst Machineworks Freedom HV 2205-1750KV

Tested KV:1770kv
Weight:25.2g
Stator W:22mm
Stator H:5mm

Catalyst Machineworks has a range of motors produced by Brother Hobby with KV suitable for 6S race quads. This is their 2205-1750KV offering, which also comes in 1660KV. It is built to suit those who want a balance of performance, weight, durability, and cost. If you are familiar with the Returner series from Brother Hobby, this is basically like a R4 in the 2205 stator size, but with titanium shaft, 16x16 hole pattern, and no pants.  For those less familiar with that series of motors, it uses a proven bell design and magnets, and has quality 4x9x4 size bearings, with a retaining screw. The result is a very durable motor, with weight that is low enough to build a sub-250g dry race quad.

Results

This data set threw me for a loop at first, because all of the props tested resulted in nearly the same sustained static thrust at full throttle, but some significant differences in efficiency. This is actually why this review was delayed by about a week. I paused to go through the data in detail to see if this was the result of a data collection error, but it all looks legit. The thrust varies more between props at lower throttle values, so this looks like evidence that the motor is being taxed hard on the more aggressive props, and performs much better when the props are unloaded in the air.

It’s pretty common to see HQ 5x4.3x3 and 5x4.5x3 V1S on 2205 motors due to their low moment of inertia and moderate pitch, so I was curious about how this motor did on those props in particular. Turns out it produced more thrust than any other 2205 motor we have seen so far with those props, but at the cost of efficiency, as is usually the case with increased thrust.