WE have had an opportunity to play with this motor in our T-Rex for the last few weeks and let me tell you it is a blast...we have never been a big fan of the 2000+ headspeed...but I understand that sometimes it is needed so that the motor does not bog and draw huge amps from the batteries during aerobatic manuevers...With this motor we use a 13 tooth pinion and run about 1800 headspeed with TP 1320mah (our favorite for the T-Rex) and have a constant headspeed during aerobatic manuevers..i.e. flips, tic tocs, piroflips...It feels like putting a big block in the helicopter...we also find that with the lower headspeeds the heli isn't as twitchy and the tail isn't so sensitive  

KV = 2280, no load/ 1.9A, Highly efficient at 13.5A.

Maximum Current - 16.5A and maximum wattage - 250W

Test Results (TREX 450):