Subject:
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Re: New Train Truck (bogie) Design
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Newsgroups:
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lugnet.trains
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Date:
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Sun, 1 Dec 2002 21:53:09 GMT
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Viewed:
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2672 times
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In lugnet.trains, John Neal writes:
> Necessity is the mother of invention....
>
> Until now, I had been happy with using standard LEGO trucks when building my
> train cars, even though they are prototypically incorrect for US versions.
> Most US rolling stock use a truck that closely resembles this truck here (a
> bettendorf):
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=3403
>
> I have created a new train car that required a truck redesign in order to look
> and work correctly (sorry, pics to come later:-) My first design attempt was
> based on Chris Tracey's idea:
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=279857
>
> Ross pondered my problem and came up with another idea that, although requiring
> serious mutilation (caveat purist;-) was a much cleaner design than my initial
> one and so we ran with his.
>
> I hope these pics are clear enough to follow-- black is a cuss to photograph:-p
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=279856
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=279859
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=279861
>
> Basically, you have a 2x6 black plate under the wheels with a 2x3 black plate
> in between them. Cover that with half studs, and place a 4x4 plate on top, add
> another 2x6 for strength and to raise the 2x2 turntable 1 more plate. The side
> bars are attached with the 1x2/1x4 bracket.
>
> But when we went to test the trucks, we found that we had serious friction
> issues with this design because we were relying on the 4x4 plate to keep the
> wheels straight. As we pondered this problem, I came up with the idea of using
> technic bushings to keep the wheels straight and prevent rubbing on the 4x4
> plates:
>
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=279863
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> They simple float on the axles to reduce the drag significantly enough (though
> not nearly as much as a standard LEGO wheel) to make the design a functioning
> success. I have decided that I am going to use this design on all TCLTC
> rolling stock. Final pics of the completed truck:
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=279864
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=279866
>
> All pics: http://www.brickshelf.com/cgi-bin/gallery.cgi?f=7051
>
>
> -John
John,
I had a similar problem some time ago with my 3 axle car wagons:
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=248393
,where the middle axle is "naked" ie without the outer part.
I used the 1x2 door rail plates too,but I put 2 of them side by side
(realizing a 1x4 plate with door rail)
Another solution I tried was to use the 1x1 brick modified with headlight. I
used 2 of them,spaced of 2,with the side studs looking outwards.
Else a couple of 1x1 or 1x2 technic bricks with 1/2 pegs inside the holes.
Cheers,
Gianluca
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Message has 1 Reply:
 | | Re: New Train Truck (bogie) Design
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| (...) Yes, as far as I can tell, that is my application as well (articulation). I would like to see more pics of your MOC, as well as more in general from you Italian 8 widers-- I love your stuff! I will be posting my cars in a week or so. (...) My (...) (24 years ago, 2-Dec-02, to lugnet.trains)
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Message is in Reply To:
| | New Train Truck (bogie) Design
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| Necessity is the mother of invention.... Until now, I had been happy with using standard LEGO trucks when building my train cars, even though they are prototypically incorrect for US versions. Most US rolling stock use a truck that closely resembles (...) (24 years ago, 30-Nov-02, to lugnet.trains)
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