On Jul 22, 1:29*pm, "Ernest Scribbler"
wrote:
"Tim" wrote

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.

One of those laws of thermodynamics says you don't get any free lunch. To
recharge your battery, your engine has to supply as much energy to put into
the battery as your motor took out. Your engine normally converts gasoline
to noise and propulsion at a rate of X gallons per hour. If you add the
burden of producing charging current to its chores you'll use X plus
something. If what you mean about speed is that you don't have to put energy
back into the battery as quickly as you took it out, there's probably
something to be gained there. The question then is whether or not you break
even on the conversion losses.

Ernest, you are correct. I'm not trying to achieve perpetual motion,
or gain a free lunch as you said. And I agree with what you are
saying.


I suppose what I am trying to convey is that, no I don't need to have
a speedy recovery rate on the batteries, like some monster 325A 24v,
greyhound bus alternator, and the electric propulsion would only be
auxillary power anyhow. But would still allow for "quiet cruise" , and
I just have a feeling that I could get some decent milage out of the
electric with no engine running, and speed/hr.s in this application
would be subjective. I suppose what I'm trying to do is burn less
petroleum constantly.