The new CR28M Contra Rotating Brushless Motor we are carrying is an awesome little motor and the sound of the twin props is awesome. I'm not sure what plane I am going to put this thing in but it should be fun no matter what!
Here is a short video of the motor running on one 40 amp ESC.
https://www.rcgroups.com/forums/show...mentid=1709056
The motor was running on one 2200mah 10c 3 cell LiPo. You can hear when the motors begin pulling more than the pack can provide and they drop off in rpm. The highest I saw the motors at while running on this old pack was 20 amps and 175 watts. I will try running the motor on 2 packs for better amp draw and running each motor on it's own ESC & Pack.
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CR28M Contra Rotating Brushless Motor on 2 ESCs
As noted in the power systems thread, I threw a magnet today and had to disassemble the motor to glue it back into place. The back side of the cans face has little fingers that hold the magnets in position, making it very easy to get the magnet into the right spot. While it was apart, I took the time to add a drop of CA to all the other magnets too.
When re-assembling the motor, I couldn't get the grub screw tight enough to keep the can from rotating on the shaft. So while it was apart, I ground a small flat spot on the shaft and replaced the grub screw, which didn't fit my hex wrench very well, with another. It is very tight now and feels much more secure on the shaft. Because of the repair work, I didn't get the batteries charged for a good run but ran the motor with 2 of the used packs from the single ESC run. You can hear where they top out and the motors die off. The motor just starts to sound great and the drop off occurs.
I can't decide if I like the synched sound of one ESC or the stacatto of the two ESCs the most
https://www.rcgroups.com/forums/showthread.php?t=817249