Re: Prop shaft alternator

Craig Briggs

Hi Ian,  We experienced no speed difference after removing the shaft generator. The un-energized alternator just free-wheels when motoring and is pretty small, so, while there is some friction in the bearings, it is miniscule. (While sailing, of course, there is no rotation, thus no speed difference.)  We have the same engine as yours but without the turbo, that is, a Perkins Prima M50 vs. your Perkins Prima M80, aka Volvo TMD22. 
Craig Briggs, SN68 Sangaris

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