Hi Bob and All,
--- Bob Rice <[EMAIL PROTECTED]> wrote:
>
> ----- Original Message -----
> From: Jim Coate <[EMAIL PROTECTED]>
>
> >
> > Steve Gaarder wrote:
> > > > Steel on steel is the ultimate in low rolling
> resistance,
This is not really true. Trains that run on
ground effect, pressurized air, would have a much
lower rolling resistance.
This allows a much lighter train chassis, less
cost, noise, shake, rattle and roll.
The only way to break 200/300 mph that we need
to make long distance trains viable is ground effect.
Other methods cost too much.
And of course the best way to power these is
electric, the most secure, eff, eco, reliable source
of energy.
> > > Does anyone know what the resistance actually
> is?
> >
> >
> > For a typical 20-inch train wheel, "the
> coefficient of rolling friction
> > ranges from 0.0005 to 0.001".
> >
> Hi All;
>
> Interesting ! Never figgured or have heard of
>You shine a flashlite at the wheel on
> the rail and can see for
> yurself what a tiny contact area it has. Looks like
> it is bearly touching
> the rail, although it may be supporting 10-15 tons!
> Of course this doesn't
> help the traction or braking dept, but it was cool
> to push cars around by
> your back, on level track. Or why a 125 ton loco can
> pull many times more
> than it weighs.
While good for bulk freight, it's way too heavy
for passengers, light cargo. Like using a SUV to haul
1 person around.
There is a mandated Hi speed, 120 mph+, train to
be built in Fla. The first leg of many around the
state to go in between Tampa, Orlando and Cape
Canaveral that is to have a ground breaking next year.
It could use some bids if anyone knows anyone in the
business.
jerry dycus
>
> Seetya.....on the train
>
> Bob
> > -- from "Bicycling Science", by Whitt & Wilson,
> page 108.
> >
> > _________
> > Jim Coate
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