Q-123: I know that there has been considerable data published recently
on home-constructed, small-sized brushless motors. Many of these motors are
based on CD drives that came out of personal computers. I read on several of the
model nets that someone had designed and built a dual brushless motor that would
allow for contrarotating propellers on an aircraft. Would you know of any
details on this specialty motor?
A-123: My good friend Bob Wilder, founder of the indoor RC Special
Interest Group, the National Indoor Remote-Control Aircraft Council (NIRAC), is
known for his experimental work on homemade brushless motors. For many years Bob
was first an engine expert and later a motor expert and has a wonderful machine
shop that supports his efforts from his home in Colleyville, Texas.
Bob recently showed me his new dual brushless motor that is set up to operate
contrarotating propellers in a model aircraft. His friend and club member Ed
Couch wanted to build and fly a scale Convair Pogo vertical-take-off-and-landing
aircraft. Bob came up with the motor to do the job.
If you would like more details on this motor, contact Bob at: rjwmaw5@comcast.net. I expect that by the time you read this, more details will have been posted to the RC Groups technical forum at www.rcgroups.com.