Motor Constants Motor Ratings Peak Torque Cont. Torque Cont. Power Speed The Printed Motor Works XR20/12 brushless DC hub motor is specially designed to withstand water ingress and has a pressure relief system to allow for the thermal expansion of the pressure compensating internal oil. The unit is designed to have a propeller attached to the motor hub and direct drive the craft. The system is totally gearless, and is totally submersible to 10m*. Line-Line Resistance Line-Line Inductance General Benefits • • • • • • Efficient electric drive system No losses through inefficient gears Compact package Design flexibility for system designer Winding design flexibility (Speed & Voltage) Totally submersible * Customer test Newman Lane, Alton Hampshire GU34 2QW, UK