Hi Folks
I live near Bob Barrows bearhawkaircraft.com plane “experimental” kits to get 
around FAA requirements.  He and his associate are building a single seater 
electric version of his bearhawk kit. They’re using an Australian APD control 
with a 3K rpm direct drive BLDC (pulsed 3 phase) magnet motor ( so no brushes 
to fail).  They bought the package from a consultant in California and Mike was 
programming the controller with his laptop when I visited.  It runs fine at 
200A 120Vdc on a Lithium China pack but at 300A starts to overheat.  So they’re 
adding a second controller for flight redundancy and dual 3 phase windings in 
the motor in the next couple months.  
Does anyone work on electric planes or is there an off the shelf electric drive 
(motor control) with a good reliable track record ?   Just don’t want to be 
reinventing the wheel here….  If you google Bob Barrows electric plane YouTube 
videos pop up about the construction and issues they’ve run into.  He estimates 
about 1/2 hour of flight time. 
Stay Charged
Mark

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