Thursday, February 05, 2009

Hoffman Magnetics 1700W for 70mm EDF

Bolt on a commonly available 70mm EDF. There is a O-ring as dampener against the inner side of the motor case, but a bit thin IMO. The motor is well balanced.
Suprisingly the outrunner base and the strut are made of plastic! Unbelievable. I need some endurance test before I can say it is safe.
This motor is crazy and delivers 1700W. I tried 4s2p 2200mAh 25c with Amp>108A and power 1500W! Thrust is over 2.4 kg !

In a 1.1 kg jet it flies like thunder. My Dean plug melted after the flight!

I wanted to tame her down by using 3s2p 2200mAh instead. The current drawn will be 90A max and 30A half throttle. Thrust max. around 1.4kg !