On Jul 20, 5:46*pm, "Ernest Scribbler"
wrote:
"Tim" wrote

I'm thinking this could be a neat alternate to running straight fossil
fuel all the time.

It would gain you some quiet time and redundancy, but probably not much in
the way of fuel economy unless you can come up with some sort of
supplemental charging method so you don't have to do it all with engine
power.

Ernest, I know what you are saying, but that's what I was pointing
out. say a group of 4-12v deep cycle batteries seriesed on 48v, an
extra alternator mounted on the engine to be dedicated for the 48v
charging system. True, when the batteries are drained it would take a
while to get them charged back, however, the engine doesn't have to
run while using the electric. And I'm not necessarily looking at the
speed of the craft, like the engine is pulling a dual load. But while
using the gas engine you're charging your electric motor system. And I
figure engine load would actually be a minorly questionable
concern,unless speed is configured into the equasion.

Yes, it's a "toy" project, and the time and effort for the extra
batteries motor installation labor etc, wouldn't out weigh the cost of
fuel consumption, but I was looking for a means to not be "totally"
dependant on petroleum.