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O Gauge - Buffer Lock


Bill

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The latest news from Barcoombe...

Well having now fulfilled my O gauge dreams of having a viable circle of track and a BR Mark 1 BSK new problems emerge...

Having 40" set-track curves solved the problem.. of having a circle in limited space...

But they are un-prototypical and so having scale models run on such a curve can present new difficulties.

There is enough slack between the coach and the engines to work just fine in forward motion..

However..

Reversing a mark 1 coach out from a siding and then straight into a 40 inch curve (an almost reverse curve scenario) we get..

Buffer lock deluxe with derailment powerful enough to lift the loco off the tracks..

Now I don't know about you, but I like my railways to work..

(I had to retire of an early version of an OO gauge Lit Hornby Pullman IBIS because no matter what one did - it did not do reverse!)

So here is how this was solved...

 

blogentry-6939-0-09702200-1438269615_thumb.jpg

 

Now this is probably a case of reinventing the wheel...

But it works!

 

blogentry-6939-0-27648100-1438269642_thumb.jpg

 

It was fashioned from a piece of 1/16" thick plastic cut from a folder cover..

And as you can see designed to slide over the buffers.

Because it is black it is hardly noticeable in operation, especially when coupled to a Heljan mark 1.

It is easy to use and remove - but whenever I am running the coach I just leave it on the Loco..

In this instance my trusty Lionheart Pannier Tank - (not perfect but designed to be faultless in operation which is a huge plus.)

Now ..

One might say what if I had two or more coaches...

The answer is simple..

If I had two coaches I would have a much larger layout with much gentler curves..

A ten by eleven foot space severely limits what can be run.

I am not in the enviable position, like some others who have much larger spaces for their layouts..

 

I thought to publish this just in case anyone was interested..

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I have a 0 layout with tight curves. I presume you're using 3link couplings on the pull moves, and buffers on the push moves. I try not to allow the buffers ever to touch, as it gives the grief you're getting. Instead I use a single long coupling link, long enough to keep the buffers apart on curves, and modify the draw hook with the slot for the link facing both ways, so the link doesn't ride up when pushing. The link might need to be slightly wider to allow for being at an angle to the draw hook, but then you have to stop it riding sideways past the hook, which can mean a dumbbell shape. Otherwise another answer I've since found to work well is to solder a short length of brass rod across the free end of the link in a T, which prevents the link over- riding. The British coupling is a damn nuisance. The other alternative is to fit the American type kadee knuckle couplings, which will perform well on really tight curves, if the mounting box is free to turn as well. Anyway, it's nice to have some action on your layout, however you do it. Good luck for the future.

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Hello Bill, here is a picture of Rod Morgan's remedy for the buffer locking on his 63.5 ft chassis length DMU's, same as a MK1 coach, this shows the brass wire whilst still brass colour, but they have since been painted black to become inconspicuous when the models are coupled together.

 

Hope Rod's idea helps you out

 

Happy modelling

Craig.

 

post-7571-0-35919600-1372367944_thumb.jp

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Thanks for  the ideas - Ingenious! I now see that a paper clip could be used as a single link, and might be just the ticket for a temporary fix...

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