In article ,
Jon Anderson wrote:

I have a customer that among other things, rewinds obsolete air coil
electric motors. He has asked me about building a dyno so he can test
motors to something other than 'yep, it turns' under power.

Looking through SIC I only find one article on building a dyno. It looks
to be a fair bit of work. As he called me while on the road today and
the connection was bad, we couldn't really get into details. I am unsure
what HP and torque the motors develop, though it's not a lot. I also
don't know what rpm range he wants to test.
Did a bit of Googling and didn't find a whole lot on small model engine
sized dyno building.

Anyone know about web resources for different approaches?


Thanks,

Jon Anderson

I had a teacher who built a dyno with a hydraulic pump & a flow
meter. He'd use a valve to build up back pressure and monitor the flow.
After allowing for pump efficiency he could calculate the horsepower
running through the system. Knowing pump displacement he could
calculate RPM.
Simple and scalable to just about any size you need.

--
B.B. --I am not a goat! thegoat4 at airmail.net