Re: Electric Snowmachine
- From: Bob Berger <srlb@xxxxxxxxxx>
- Date: 25 Sep 2007 08:58:00 -0700
In article <46f8f278$0$32517$4c368faf@xxxxxxxxxxxxxx>, Pieter says...
In fact electric motors develop maximum torque at stall. This is why they
are ideal for locomotives - massive torque at startup. I have a GE electric
garden tractor, and while s-l-o-w, the pulling power from the small electric
motor is surprising. But given variable diameter clutch technology, massive
torque at stall may not be ideal or necesssary for snowmobile operation.
However, the other consideration is weight. In the "Old Days" the two cycle
engine was preferred for sleds primarily because with a power stroke on each
revolution it produced a lot of power for its low weight. While an electric
motor can be made small, light and powerful, the associated power storage
(batteries) are grossly overweight compare to an internal combustion engine
(tank of gas). My litle tractor has 6 six volt batteries, and is
considerably heaviler than a conventional tractor of comperable power. In
addition, batteries suffer from power losses when very cold.
Think "entire systems", not just "motor" - electric snowmobiles don't make
a lot of sense. This thread originally arose as a result of a piece about a
college engineering exercise, I believe. It's a great engineering exercise
for educational studies since it brings a lot of factors like size, weight,
environment, and power curve into play. It likely will never be a practical
solution to any clean air problems snowmobiles might poses.
Think "fuel cell" rather than battery. The major problem with this option is the
lack of availability of hydrogen and oxygen when and where it's needed.
.
- References:
- Electric Snowmachine
- From: Grumpy
- Re: Electric Snowmachine
- From: Gary C
- Re: Electric Snowmachine
- From: Wes 94 ZR580
- Re: Electric Snowmachine
- From: Pieter
- Electric Snowmachine
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