This is the latest offering from DYS with some really interesting feature sets, including a 0.10mm lamination thickness. DYS sent it over for testing.
I've been seeing a lot of information about this motor around on social media, so it is great to get it in and on the bench and peice together the performance factors. The build quality on this motor is solid but not exceptional, featuring the same hollow shaft with retaining screw on the bottom as the SE series of motors. As with the other recent DYS motors to hit the bench, the shaft is not hollow all the way through, but only in the top part of the prop adapter. This isn't likely to be a problem other than weight saving as it is likely stronger than a fully hollow shaft, which is likely why they switched. The machining is decent and the bright purple anodization is a nice flair. The bearings didn't feel quite as smooth as I'd like and the set screw on the bottom is made of very soft metal, which makes it virtually impossible to remove without some serious work and the correct tools. The washer is also often off-center a bit, which is not likely to be a problem, but something you notice when spinning the motor and looking at the bottom. After the test sequence the test motor developed a bit of diagonal play in the bell, that seems to suggest either the bearings aren't quite tight in the race, or the shaft isn't quite tight inside the bearings. The windings are excellent and thick single guage wire, but the motor uses square magnets which results in an air gap between the magnets and stators is not as close as I'd like, and the weight of this motor is a bit on the heavy side for a 2206 at 32g with factory wires. Overall, decent design, but could use some improvement on the execution. Switching to 12.9 steel for the retaining screw and tightening the tolerances on the bearings and the air gap between the stators and magnets would make this a win.
Now on to the bench results!
I have to say I was a bit disappionted in the results here, but that was mostly because my expectations were a bit high. The 0.10mm laminations really had my hopes up as a major performance boost, given the boost seen in the 0.15mm laminations. It seems that other factors in this motor are the bottleneck in the performance. I'd guess either the magnet strength, or the air gap, or a combination of the two are contributing, but the performance fell just short of the ZMXv3 2206 2300kv motor, with almost identical RPMs, but slightly slower response times. To be fair, this is not bad at all, but given the design specifications I was simply hoping for more.