A first motor from a big name in the hobby.
Check out the full list of motors in this series here
Published: Aug 22, 2017 by quadmcfly
RotorRiot has been a huge name in this hobby for quite some time, bringing mostly media content but also carrying some custom OEM products that have been quite popular over time. Their decision to enter the motor market is not surprising, and the level of work they have put into making this motor has impressed me. I had the opportunity to be involved in and witness the prototyping phase for this motor, and I was impressed with the amount of research and feedback that was taken into consideration during the process. This motor is a custom OEM from T-motor, so the build quality is definitely there, but RotorRiot specified essentially all the design parameters that make this motor what it is. The design is visually interesting, and different from most of the other motors on the market at the moment. The tolerances and machining on these motors is impecable, which is not unexpected given the source. There are a few change-ups from T-motors typical fare. The windings are very thick guage single strand silver-plated wire, compared to the multistrand that is typical from T-motor. The mount holes are also the 16x16mm patern that is becoming more popular recently, over the traditonal 16x19mm pattern, and the motor uses an open base design. RotorRiot also chose to go with a retention screw rather than a c-clip for 4mm hollow shaft. During the development process I warned that this could be problematic, and they have taken steps to ensure the screw is a large enough hex and high strength steel, which should mitigate any issues inherent to the design. Another interesting decision here was to go with slightly weaker magnets and a tad higher KV in order to gain some efficiency around the upper-mid throttle range. The weight comes in right at 30g, which given the stator size and construction is quite impressive. Overall very solid construction and a visually interesting design backed by solid research.
This motor is designed to hit the mid-kv freestyle market, while still being light enough and powerful enough for racing. The results here back up that combination, showing strong results with very reasonable efficiency. The KV is spot on to the stated KV, which is a bit unusual for T-motor, but nice to see. Response times are solid, comparable with many of the other larger stator motors on the market even with the step down in magnet strength. This motor will be flexible enough to run on a large range of prop sizes, from lighter weight tri-blades for freestyle to heavier and higher pitch tri-blades for racing and even light 6" props for big-sky freestyle and cruising. A very strong entry into the market from RotorRiot.