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Old 05-19-2022, 07:36 AM   #72
Dav
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City: NC
Join Date: Apr 2021
Posts: 46
Quote:
Originally Posted by rslifkin View Post
That makes me think of an interesting point. You may end up with a tradeoff. The actuator type would be harder to back-drive, so it would likely use less power and make less heat (as it wouldn't need to provide as much motor torque to hold against water pushing on the rudder).
These direct driven high torque motors usually have a integrated, but separate magnetic braking device, so that the no-speed torque does not need to be held actively and thus consumes very little torque/power. Maybe a separate positive locking pin would also be a good addition, like they have in the hydraulic fins usually.

Maybe this is where we could leave a place for (electro)hydraulics, for braking it is an excellent choice
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