Subject:
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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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Sat, 30 Nov 2002 22:21:21 GMT
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Viewed:
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1236 times
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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 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
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
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Message has 4 Replies:
 | | Re: New Train Truck (bogie) Design
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| (...) John, I had a similar problem some time ago with my 3 axle car wagons: (URL) 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) (...) (22 years ago, 1-Dec-02, to lugnet.trains)
| | | Re: New Train Truck (bogie) Design
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| Awesome truck design!!! Kinda a parts-eater, but I get the feeling you don't have to worry about running out of bricks. I like the use of the arm-thingies especially. Very cool. -Stefan- (22 years ago, 2-Dec-02, to lugnet.trains)
| | | Re: New Train Truck (bogie) Design
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| John wrote: > 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 (...) (22 years ago, 2-Dec-02, to lugnet.trains)
| | | Re: New Train Truck (bogie) Design
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| (...) Black is easy to photograph. What's hard to photograph is high contrast. Putting something black on a white background is high contrast. Try photographing it against a dark background. The camera should adjust the contrast and it will turn out (...) (22 years ago, 5-Dec-02, to lugnet.trains, lugnet.publish)
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