Re: DC really is OK


"Bob May" <bobmay@xxxxxxxxxxx> wrote in message
news:_PSdnQGX7_5Hjm7ZnZ2dnUVZ_u2dnZ2d@xxxxxxxxxxxxxx
Now make it slow down on the up hills and speed up on the downhills.

Are you talking about doing that automatically? Because one can do that
already just by turning the throttle.
And if you are talking about "up hill slow, down hill fast" being done
automatically, can it be done in DC?
What's out there now is BEMF enabled decoders that act as a speed
governor that keeps locos at a constant speed if turned on. What I'd like
to see is the opposite reaction, where if a loco enounters more resistance,
say like coupling into a cut of cars that out weigh the loco by 3 to 1, that
the loco slows down. The engineer would then have to add more throttle to
move the loco (and of course this would be with sound, meaning you could
hear the loco laboring to move a cut of cars).

After you do that, set the throttle up so that you have seperate controls
for speed and braking like the real locos have.

We already have that with the latest QSI sound boards. You set your
decel momentum (CV04) to a high number...maybe 100 or more. This means your
loco is going to coast a long way before it comes to a stop by itself
without any further action on your part.
As you are going down the track, you decide to come to a stop. Reduce
the throttle to zero, and the RPM's of the motor will drop to idle. Then
push and release F7 on your DCC throttle. You will hear the hissing of air
and some brake squeel. This is the air brake coming on.
As air escapes, the loco's speed will drop at a much more noticable
rate...and that rate increases as time goes on. If you get to a decel rate
that pleases you, simply push and release F7 again, and the air noise stops.
The train will continue to decel at that rate until it stops unless you
either press F7 again, which will again release more air from the line to
stop the loco even quicker, or you simply accelerate, canceling out the
braking action of the loco.
The Emergency Brake, of course, cancels out all momentum and stops the
train as fast as the flywheels allow.
So while it's not perfect, it's not unlike the "momentum" DC throttles
with a service brake feature and emergency brake feature.

Paul A. Cutler III
*************
Weather Or No Go New Haven
*************





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