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Re: rwandrw post# 1003

Tuesday, 02/06/2018 8:06:35 AM

Tuesday, February 06, 2018 8:06:35 AM

Post# of 2470
"MI has already shown they can lift the M 400, the motors produce 3 hp for ever Lbs of motor"

Some comments:

The M400 has never flown with the engines intended for it (four of the two rotor 1060 cc engine). The only flying demonstrations were done with four 530 cc engines, without a pilot, and likely a minimum fuel load. Backyard tinkerers can easily exceed this performance, see Youtube.

3 HP per lb of motor - Perhaps this was accomplished, although I've never seen this independently confirmed. But for how long, and under what conditions? From a given motor, power output and reliability are inverse -- you can boost a motor to provide a lot more power than usual, but the time to failure drops dramatically.

As a joke, we used to test 12 volt electric motors on a 0 - 300 volt power supply. The motors would run at much higher voltages than they were rated for - but not for very long, and the failure was usually pretty dramatic.
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