The EY unit IS set up as you describe - each motor has it's own belt, and it's own corresponding pulley on the main shaft. Belt tension is adjusted independently by loosening 4 bolts and sliding the motor up and down in slotted holes. There is no "quick release" mechanism for belt tension but in the (highly unlikely) event of catastrophic failure like a seized motor, it could be de-coupled in a minute or two if you have a wrench handy, or in seconds by cutting the belt. You'd probably need a good serrated rigging knife as those belts are pretty tough.
Jim
--- In electricboats@yahoogroups.com, "Ed Bachmann edbz" <edbz@...> wrote:
>
> Why couple the two motors together like the EY 360ibl when the big desired benefit for two motors and two controllers is redundancy?
>
> How about mounting the motors so each links to the drive shaft via its own belt drive? Design the belt tensioning method to allow either motor to be disconnected easily. Or, in an emergency, a knife could be used for a fast disconnect.
>
> Ed B
>
>
> From: Eric
> Sent: Friday, September 09, 2011 9:05 PM
> To: electricboats@yahoogroups.com
> Subject: [Electric Boats] Re: why you don't want to oversize electric propulsion motors...
>
>
> Coupling two motors together is not uncommon. But like we discussed before, you still need two controllers. And you still would need some sort of reduction if you wanted your motors to spin faster than the propeller shaft. Hey, that sounds just like an EY 360ibl... ;) If you're thinking about direct drive, they would be just like the Solomon Technologies motors. (now that I've watched the videos, they are Solomon motors)
>
> His theory that running two 4.5kW motors instead of the 9kW motors would increase his regen capabilities may not play out in the real world. This sounds like a case where experimentation would be needed to support that premise. I can't believe that his regen would double for the same sailing speeds. He does seem to have a lot of interesting things to say, but I think that he plays a little fast and loose with specific data. It does make a good story though...
>
> Eric
>
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