Re: [Amc-list] ELECTRO-RAMBLER =revisited=

[adh@xxxxxxxxxxxxxxxxx (Sandwich Maker)]

" From: Frank Swygert <farna@xxxxxxx>
" 
" I think the guy meant energy usage efficiency, not motor efficiency.
" Drawing less amps means the motor and controller doesn't get as hot,
" and the batteries aren't depleted as quickly, so range is increased.
" This implies overall efficiency of the SYSTEM (as installed) is
" increased. 

but: if he's drawing high current from the batts at batt voltage,
that means high power, and if the vast majority of that power [>90%]
isn't coming out the motor shaft it's making a mockery of pwm
controller and electric motor efficiencies.  -massive- heat
dissipation!!!  and high power coming out the shaft should mean he's
either accelerating like crazy or climbing a steep gradient.

" I'm trying to figure out what's implied as happening, not taking him
" literally. 

me too.  he put the system together very well, but he strikes me as
more of a mechanic than an engineer.

" On May 3, 2007 andrew hay wrote:
" 
" > " From: Wrambler242@xxxxxxxxxxx
" > "
" > " I stumbled on the website that the guy has who built the 4X4 XJ EV. 
" Url is at work. Google should be able to find it, try EV Jeep or
" somethignt o that effect.
" > " Anyway, he says that electric DC motors get the best "economy" by
" running at their rated rpm.
" > 
" > i think he's talking through his hat.  electric motor -efficiency-
" is
" > not dependent on speed.

--
i've just discovered the d35 ifs front axle that ford used does have a
high pinion.  two crazy ideas immediately came to mind:
1. does the chuck have stub axle tubes, or could collars for them be
welded on, so that an amc15 axle housing could be deconstructed and
this chuck subbed?  only the housing would be custom - all the parts
that go with it would be stock amc15 save the high pinion r&p.  this
for the electro-rambler, with the motor under the trunk floor behind
the axle.  lowest gear available is a 5.13!
2. could the chuck be adapted to the eagle in place of the current d30
front?  amc diffs f&r!  one hitch is that available gears are only for
the d35 3/4 carrier, which normally cuts off at 3.55 for the rear axle.
there is a 3.27 for the front, which is close enough to work with a
3.31 rear - but weren't 258/auto eagles geared 2.73 or taller?
________________________________________________________________________
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen
adh@xxxxxxxxxxxxxxxxx                       and think what none thought
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