Subject:
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Re: Couplings for long overhang 4 wheeled vehicles
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Newsgroups:
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lugnet.trains
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Date:
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Thu, 16 Sep 2004 13:39:06 GMT
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Viewed:
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2835 times
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In lugnet.trains, Tim David wrote:
> >
> > That's right.
> >
> > The problem with that is you're relying on the strength of the axle and peg
> > friction in order not to pull the couplings apart. With 12-wide stock
> > there's some serious weight to pull! Also, your magnet holder is likely to
> > rotate, even using an axle pin with friction, due to the forces of the heavy
> > train.
> >
> > You could vary my method by replacing one of the 2x4 plates with a 5L, 6L or
> > 7L 4mm wide liftarm, attaching the end to the stud of your magnet holder. I
> > did this on my tube wagons (sorry no pictures).
> >
> > The result is an arm 8mm wide x 4mm high, with a magnet holder on the end.
> > The liftarm and magnet holder make a good joint, with the joint being at
> > right angles to the pulling force, and I've had no problems with sustained
> > running of 6 tube wagons. I also use the liftarms on other permanent rakes
> > of stock, sometimes extended with 1-wide plates.
> >
> > Mark
>
> I had considered the problem of relying on the friction of the axles/pegs. My
> thoughts were that the magnet to magnet join would actually be the weak link,
> although the coupling assembly might pull apart a little at a time with use.
> Presumably your experience with heavy vehicles has proved otherwise.
>
> I don't quite understand your alternative design, do you mean attach the Technic
> liftarm to the stud of a 2x3 magnet holder? If so do you find the one stud
> connection strong enough? If I've misunderstood, sorry!
>
>
> Tim
Having had a look at your pictures I can see what you mean, you have used the
hole in 2x3 magnnet holder AND the stud on the top to give strength
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=832446
tim
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Message is in Reply To:
 | | Re: Couplings for long overhang 4 wheeled vehicles
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| (...) I had considered the problem of relying on the friction of the axles/pegs. My thoughts were that the magnet to magnet join would actually be the weak link, although the coupling assembly might pull apart a little at a time with use. Presumably (...) (20 years ago, 12-Sep-04, to lugnet.trains)
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