Subject:
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Re: This is odd...
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Newsgroups:
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lugnet.trains
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Date:
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Fri, 25 Oct 2002 15:46:32 GMT
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Viewed:
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596 times
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In lugnet.trains, John Neal writes:
> In lugnet.trains, Stefan Garcia writes:
> > In lugnet.trains, John Neal writes:
>
> > > One thing you didn't suggest was that maybe the one motor is worn out.
> > > Stefan, did you pull a switch and see if the results were the same?
>
> > That only adds to my confusion. The Porter has the old motor and my
> > Greenbrier has the brand new (3 days old) motor. I did take out a battery
> > box which really wasn't needed, and it's a bit better, but I can't make the
> > engine much lighter.
>
> Okay, then your problem is drag. Weight isn't so much a problem if there isn't
> a lot of friction. I just looked at your engine again and I can see your
> problem, because it is one that my son Ross experienced when he built his
> Pacific:
> http://www.brickshelf.com/cgi-bin/gallery.cgi?f=16328
>
> The driver rods create A LOT of resistance and are probably the culprit here.
> Try removing them and see if that helps any.
The Consolidation was torn down shortly after my article was in the paper.
My new engine is quite a bit bigger, but they're essentially the same. I
did disconnect the two center drivers from the side rods, which reduced
strain on the 9V motor, but those don't even touch the track.
> Although steam locos are way interesting to look at, they present formidable
> engineering problems in this medium. Keep adding/removing/altering your design
> and see if you can solve this by trail and error. Don't get discouraged-- it's
> all a part of the fun:-)
Oh so true. This is the 4th in a line of steamer designs going back to the
middle of summer.
> -John
-Stefan-
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Message has 1 Reply:
 | | Re: This is odd...
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| (...) The problem isn't drag then, it's draw on the current. You're running a separate motor to drive those wheels, and I know from you in person today it's running on the output studs from the train motor. That's taking power away from the (...) (22 years ago, 28-Oct-02, to lugnet.trains)
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Message is in Reply To:
| | Re: This is odd...
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| (...) Okay, then your problem is drag. Weight isn't so much a problem if there isn't a lot of friction. I just looked at your engine again and I can see your problem, because it is one that my son Ross experienced when he built his Pacific: (URL) (...) (22 years ago, 25-Oct-02, to lugnet.trains)
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