My yacht, a SS34, has a waterline length of 7.37m (24.2 ft) and displacement of 9200 lbs. I'm thinking of a nominal 10kw (continuous 5kw) brushless motor 48v setup with appropriate battery system. I expect a gear reduction pushing a folding 16x10 prop.
As a racing yacht I need to prove to the auditors that I can motor at 4.88 kts into a 12 knot headwind. The rules don't say for how long but let's assume 2 hrs.
As a offshore cruising yacht I'd like to be able to motor for longer than this, but after lurking here a while and reading past posts I suspect that longer is going to require some sort of generator/ genset to provide a recharging source.
Is one of the 5-8 kW generators ( Honda or similar) enough power to extend the cruising range? Is it possible to use one of the cheap Chinese diesel generators ( here $1k for 5kva) Instead and avoid carrying petrol on board?
Is it possible to marinise them and duct the exhaust out so it can be mounted below or is it just too small for this purpose.
My 20hp Volvo md11c is on its last legs and I'd like to go electric but I need the ability to charge batteries on a 5 day race and have some emergency capacity for the dreaded Lee shore.
Any assistance would be appreciated
Paul
Melbourne Australia
Posted by: sailing@misty.blue
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