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Wagon wheelbase O scale
 Moderated by: oztrainz Page:  First Page Previous Page  1  2  3  4  5  Next Page Last Page  
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 Posted: Mon Sep 11th, 2017 09:54 am
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Helmut
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@Si
tz.tz. The Swiss did not invent the cuckoo-clock,
it is a genuine black forest product.
The Swiss may not have been so blood-thirsty, but they gave the world e.g. precision clocks and gears. Ever heard of a reliable Italian watch?



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 Posted: Mon Sep 11th, 2017 10:03 am
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Si.
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Ever heard of Orson Welles ?


:moose:


Si.



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 Posted: Mon Sep 11th, 2017 11:35 am
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Helmut
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Of course I have.



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 Posted: Wed Sep 13th, 2017 10:50 am
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George Ruthven
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I was so inspired by Woodie's advice I set out early and found some standard flat plates, washers, a single chain link and a split pin to put together a link & pin system.

Some drilling and voila I think this is the answer to my grandson's woes (close to tears)  every time a wagon(s) uncouples.

The length from wagon chassis to split pin seems a bit much - will check with the existing plastic ones - don't want the distances between wagons to look unnatural or have him grow up with faked realities:)

Next is the wheelbase experiment.

Attachment: Link&Pin1.jpg (Downloaded 24 times)



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 Posted: Wed Sep 13th, 2017 10:51 am
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George Ruthven
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and another view

Attachment: Link&Pin2.jpg (Downloaded 25 times)



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 Posted: Wed Sep 13th, 2017 11:00 am
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Si.
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I think THAT'S worth 5 Einsteins ! ! ! ! !



:brill: :brill: :brill: :brill: :brill:



Si. :thumb:



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' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
http://www.slotforum.com/forums/index.php?showtopic=59295&st=0&a
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 Posted: Wed Sep 13th, 2017 11:08 am
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oztrainz
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Hi George,

Have a look at page 19 and 20 at http://www.hse.gov.uk/pubns/mines06.pdf, specifically the calculation for minimum radius of 4-wheel wagons. 


The link is to specifications for underground mining equipment in the UK. With a known curve radius you can work backward to get a maximum wheelbase to avoid flange-lifting. Note that the wagon weight does not appear to be part of the equation. There is probably some fudge factor in the equation but I wouldn't like to guess or calculate how much from first principles,



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 Posted: Wed Sep 13th, 2017 11:17 am
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George Ruthven
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Thks Si, thks John - super document.
George



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 Posted: Wed Sep 13th, 2017 01:45 pm
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W C Greene
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That's the way George! It DOES look like it should. I am sure that somewhere there's a prototype for the couplers. I sort of reminds me of the "radial" couplers used on streetcars and other industrial types.
Maybe a bit of rusty paint (or not) and you're in business.

Woodie



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 Posted: Wed Sep 13th, 2017 03:48 pm
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Kitbash0n30
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Thanks for the mines publication, John.
George, if there wasn't a real coupler like that there might should have been; either way, it ultimately _is_ prototypical because it _is_ the prototype!



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