AON 2815-3000 RPM/Volt (Kv) 3000 kv Resistance (Ri) 0.825 ohms Idle Current (Io) 1.2A Max Current 40A Avg Current 16A-20A Length 35mm (1.389in) Max Watt 230 Weight 98g (3.46oz) Diameter 28mm (1.1in) Shaft Diameter 3.2mm (1/8in) Magnet Neodymium Firstly my thanks to AON Electric for supplying this motor for testing. The AON is a 3000kv brushless motor and a new entrant in the brushless motor market. It is at the heavy weight end of the spectrum for an X400 motor with a weight of 98g. The motor came with an all round heatsink but this will not fit between the X400 side frames. I fitted a 13T pinion in line with the 3000kv motor rating. Having set the Titan 30A ESC appropriately I did a test spool up to measure headspeed. The figures returned 2500+ RPM. My flight tests with this motor have been mainly some small climbouts and hovering as I have been limited by bad weather. The longest time spent on the motor being some fast runs up and down the road. The motor is smooth and prdictable but not in what I would class the 'hot rod' category. AON recommended going 4S with this motor, which will form the second part of this review, on 3S the motor is producing a reasonable flight performance. The motor responds well to throttle changes with loading audible when applying full pitch as well as a noticeable drop in headspeed. I'm going to run two separate bench tests for the AON, one test using the Kokam 3S 2000mah and the other with the Thunder Power 4S pro-lite 20000mah pack. Both tests will follow the standard format as below. The tests were conducted in an ambient 20 degrees centigrade, 68 degrees Fahrenheit. The pitch range on the X400 being from +/- 9 degrees. Blades used were the standard ARK 280mm wood blades. Time period Activity 90 seconds Spool up and hovering throttle/pitch (mid stick) 30 seconds Full power / full pitch 30 seconds Hovering throttle/pitch (mid stick) 30 seconds Pitch pumping from full negative to full positive pitch 60 seconds Hovering throttle/pitch (mid stick), spool down The 3S graphs : The AON (on 13T) recorded the following maximum values : 14.9 amps 12.53 volts 163 watts The recorded minimum voltage was 10.94 volts during the 30 second full throttle/pitch. The motor temp at the end of the test was 60 degrees centigrade, 140 degrees Fahrenheit. The lithium pack reached a max temperature of 27 degrees centigrade, 84 degrees Fahrenheit. All of this is well within specification and nothing of concern. During the 30 second climbout the headspeed dropped from 2490RPM to 2340RPM. A total drop of 150RPM. As this is the first motor test on the X400 I can't comment comparatively as to whether this is good or bad. What I can say is that for 3D this drop in headspeed would not cause many problems and I would be very happy to fly with these figures. Where this motor shines is in it's amp draw, which peaked at only 14.69 amps during the 30 seconds of full pitch/throttle. In the hover the motor is only pulling 7-8amps. So if you are looking for a sport flyer motor capable of giving good flight times then this may be the motor to go for on a 3S configuration. I say 'may' as this is a heavy motor (98g) and much lighter motors could produce similar power output and amp draw to this. It will be interesting to see how this motors characteristics change when using a 4S pack as recommend by AON. 4S test to come.....