Electric Free-way

[Colin Dedman <cjd121@rsphy1.anu.edu.au>]

Michael A Perry wrote:
> 
> I looked through all my old e-mail and couldn't find the conversion figures I
> thought were posted.
> 
> With 6 12V group 27 Excide deep-cycle batteries, I have about 320lbs installed.
> 180 min @ 25A discharge, 105 A.H. (20hr rate), wired into a 72V pack.
> 
> Would that work out to 1/3 gallon of gas equivilent, in a fairly inefficient
> engine... such as a Koeler industrial? I ask this question because a friend is
> considering a similar installation.


Using Bill's 600lbs lead per gallon, your 320lbs of batteries should be
equivalent to 0.53 gallons of gas. If the engine is unusually
inefficient, then it uses more gas, so your batteries would be
equivalent to maybe 0.6 gallons of gas. To put it another way, for an
unusually inefficient ICE vehicle, Bill's constant will be smaller - say
500lbs lead per gallon of gas.

I don't fully understand your situation, or the reason for the question.
Can you tell us :-

(a) Is the original Free-way electric or ICE?

(b) If the Free-way was originally IC, did it use a "Koeler industrial"
engine? What sort of speed is the Free-way designed for?

(c) Did you convert a Free-way, which was originally ICE, to electric?

(d) You said previously that an ICE Free-way "would get 80-100mpg". Is
that an estimate, or did you IN FACT get that milage from an ICE
Free-way before you converted to electric? 

(e) Is your friend also considering converting an IC Free-way to
electric, or is he considering converting an electric Free-way to Koeler
ICE power?

Sorry for such silly questions, but I know nothing about the Free-way,
and need to be completely clear about what you are doing before I offer
any comments.

Best regards, Colin