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Old 10th Apr 2019, 03:20
  #3795 (permalink)  
Join Date: Jul 2009
Location: Not far from a big Lake
Age: 77
Posts: 1,458
Loose rivets
It is entirely possible to change speed with a properly wound 3 phase motor by electrical means only, without resorting to clutches and alternate gear paths.
When motors are powered by 400 cycle power, you can make them much smaller for the same horsepower output.
No doubt, there is a gear reduction between the motor and stabilizer trim to match torques properly, but that is all that is necessary to do the job.
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