Tuning Locomotives

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Puckdropper - 27 Jun 2010 06:07 GMT

I just picked up a new Walthers Trainline GP9M at a show, and it runs
beautifully. When I drop the power from ~8V to 0V, it continues on for
another inch or so.

How can I get my other Trainline GP9Ms to do that? What kinds of
adjustments should I be looking to make in the mechanism?

Puckdropper

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Never teach your apprentice everything you know.

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Steve Caple - 27 Jun 2010 07:26 GMT

> How can I get my other Trainline GP9Ms to do that? What kinds of
> adjustments should I be looking to make in the mechanism?

Just guessing, but is it DCC and does it have a momentum setting?

Or a really good flywheel?

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Steve

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Puckdropper - 27 Jun 2010 09:28 GMT

Steve Caple <stevecaple@commoncast.net> wrote in news:1blcn5tryjwj
$.9n8smrdldsdo$.dlg@40tude.net:

>> How can I get my other Trainline GP9Ms to do that? What kinds of
>> adjustments should I be looking to make in the mechanism?
>
> Just guessing, but is it DCC and does it have a momentum setting?
>
> Or a really good flywheel?

No DCC yet. It's not simulated momentum, the same effect can be observed
by turning the power pack off without moving the dial.

Puckdropper

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Never teach your apprentice everything you know.

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Wolf K - 27 Jun 2010 16:26 GMT

> I just picked up a new Walthers Trainline GP9M at a show, and it runs
> beautifully. When I drop the power from ~8V to 0V, it continues on for
[quoted text clipped - 4 lines]
>
> Puckdropper

Either you just got lucky, and the mech has no flash on the gears, or
just enough play in it that it doesn't bind when you turn off the power.
Or else the mech has been changed.

Keep in mind that the ability of the flywheel to continue to turn the
worm gear depends on the thread pitch. Low pitch = high resistance to
free wheeling (but more efficient power transmission). High pitch =
easier free wheeling (but less efficient power transmission).

IOW, I don't think there's much you can do. IIRC, the Trainline mechs
use plastic gears, and these do not eun in as metal gears do.

HTH
wolf k.

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Model Forum / General / Railroads / June 2010

Tuning Locomotives