Subject:
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Re: WHAT IF? Take a look!
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Newsgroups:
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lugnet.trains
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Date:
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Mon, 31 Jul 2000 19:07:53 GMT
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Reply-To:
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cmasi@cmasi.chem.(AntiSpam)tulane.edu
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Viewed:
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1880 times
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James Powell wrote:
> > 2. Considering the regular points ar $25+ a pair. How does the $25 price tag • compare
> > with similarly sized, would that be O gauge, model railroad stuff?
>
>
> Dealing with OO sized stuff, PECO points are from 14-20 CDN each, compaired
> with $35 for 2 lego points (so, about the same). Neither are motorized,
> although if Lego would reduce the tabs on the points, a $8 "set" could be used
> to motorize them using a small Pnumatic cylinder.
> Thanks, good to hear that LEGO points aren't more expensive than similarly
> sized model RR stuff.
>
> > 3. I wouldn't mind making the tranistion to 12 V motors for better uphill • pulling
> > power as long as the track remained compatible.
>
> Changing voltage would not affect haulage. You are quite safe to run the 9V
> motors on 12 volts, as long as you expect your loco to not make any turns at
> all!.
Running a 9V motor at 12 V for extended periods (say with a heavy load so the
train will not fly off the track) will shorten the lifespan of the 9V motor.
>
> I find that haulage is limited more by couplers than by motor. I could haul
> 85+ cars with a single motor, and the limit was that the coupler would break,
> not the motor stalling (although, you had to pull slack to get the train
> moving...that is a realistic effect of a heavy train)
I thought that voltage would matter. I understand that ultimately the strength of
the coupler will decide how long the train will be, but a 12 V motor should be
able to pull a train of say 12 cars faster than a 9 V motor could pull them.
Since power = current x voltage[1] (work = charge x voltage[2]), one would think
a 12 and 9 V motor should be able to do the same amount of work or generate the
same amount of power. In practice 9 V is not always a high enough potential to
force the required current through the circiut to generate the power to do the
work.
>
> James P
1. power is work per unit time, right?
2. work = charge x voltage comes from -w = nFE° where n is number of moles of
electrons, F is Faraday's constant, n x F is the charge, and E is the potential.
In -w is from the systems point of view, we are talking about the surroundings
point of view so the - goes to +.
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Message has 1 Reply:
 | | Re: WHAT IF? Take a look!
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| (...) Lets put it this way: I don't think you are going to harm the Lego motor unless you build it into a special engine that is designed to stand 12 volts around highly banked corners. I can try it if you want...I have ample 12 volt supplies and (...) (24 years ago, 31-Jul-00, to lugnet.trains)
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Message is in Reply To:
| | Re: WHAT IF? Take a look!
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| (...) compare (...) Dealing with OO sized stuff, PECO points are from 14-20 CDN each, compaired with $35 for 2 lego points (so, about the same). Neither are motorized, although if Lego would reduce the tabs on the points, a $8 "set" could be used (...) (24 years ago, 31-Jul-00, to lugnet.trains)
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