Powerful motor
"Use these for my O3 tiny trainer and it is so much lower that it sags my battery even at just hover throttle. When I have a full newly charged 3S lipo, and take off and hover, average cell drops to 3.8-3.9volts immediately. So they’re quite power hungry but it’ll zip you around. Usually get 3 minutes before I hit 3.5volts. Go slow and you get around 4 minutes. Keep in mind the shaft size is a unique 2mm and not many props fit. I couldn’t find any except the standard tiny trainer props which are press on. You can use screws in addition to the press on. But despite my hesitation of press on props, they work fine."