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John Candy
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« on: May 20, 2009, 06:39:44 AM » |
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The Society is proposing to produce at least one kit for a realistic stop block and is looking at the possibility of a kit based on a rail-built LNWR design (see photo.).
The complexity of construction will be price-related : The higher the cost the fewer parts and the simpler to build.
To help us form a view on what members actually want us to provide and to gauge the market for such a kit, please take part in the poll.
Would you buy a kit for the LNWR stop block if the cost were in the range 20 to 30 GB Pounds?
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« Last Edit: May 20, 2009, 07:05:41 AM by John Candy »
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Traininvain
G3 Venturer
Group A Forum Member
Posts: 22
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« Reply #1 on: May 20, 2009, 03:54:07 PM » |
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Another member has made a number of rail built buffer stops (GWR pattern I think, but there's not a great difference between them) using G3 rail and a modified plumbers pipe bender. A similar method could be used to create kits of parts which would be relatively inexpensive.
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Derek King
G3 Society Member
Group A Forum Member
Posts: 42
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« Reply #2 on: May 21, 2009, 10:09:32 AM » |
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Sorry, not interested in the LNWR type, though would be interested if one was produced in the LYR/MR style as discussed in our previous correspondence on this subject. But with such a small membership and so many varieties maybe the tools/jigs to make our own out of readily available rail, with say castings for the brackets to support the beam, etc., would be the better option. The idea of using a small pipe bender sounds interesting, will have to have a look at what is available the next time I'm in B&Q (on pensioner's day!).
Derek.
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MikeWilliams
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« Reply #3 on: May 21, 2009, 03:20:23 PM » |
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Hi Derek,
The choice of LNWR was, amazingly, not mine - honestly!
John Candy (and perhaps I helped just a little) looked at the options and reached the conclusion that the MR/LYR type which you suggested was too complex to produce since fabrication of the individual parts would mean the side rails being bent at about 110 degrees. They would be too time-consuming to do in quantity and therefore brass casting for the major parts would be necessary, resulting in prohibitive cost due to the size of the castings required ..... which is probably the reason nobody else has produced a kit. This particular LNWR type has fewer parts and all the rails are straight, so can probably be produced within the 30 Pounds limit mentioned. They have also been seen, at least in recent years, well outside the LNWR system.
We are aware of stops available in 7mm made from whitemetal, and also some from resin, but neither seemed appropriate for our size.
I know this is of little comfort to you, but if we cut our teeth on this one and test the market, then maybe we will have the confidence to try others later. Sorry.
Mike
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keith Bristol
G3 Society Member
Posts: 57
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« Reply #4 on: May 21, 2009, 09:33:25 PM » |
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sorry wrong region for me.
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idriver
G3 Society Member
Group A Forum Member
Posts: 11
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« Reply #5 on: June 08, 2009, 04:58:36 PM » |
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As a matter of interest I have built a number of prototypical buffer stops from straight unbent bullhead rail section. The prototype was observed in a siding in Basingstoke station and consists of 3 x 4.5 inch rail section soldered together for the beam , 2 off 2 x 2.5 inch pieces soldered together for the vertical posts soldered to the running rail. Rear strenghtening pieces being 3 inches soldered from both sides of the vertical posts to both sides of the running rails and forward supports of 2.125 inches again fixed to both sides of the running rail and vertical posts. Mine are all soft soldered and have with stood the impact of quite a hefty shunt from a live steam loco.
You can almost build one from a 1yd length of rail.
regards
Ian D
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idriver
G3 Society Member
Group A Forum Member
Posts: 11
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« Reply #6 on: June 09, 2009, 03:36:03 PM » |
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Further to my last post the rear stays are 3.5 inches long
regards
Ian
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blagdon
G3 Society Member
Group A Forum Member
Posts: 6
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« Reply #7 on: November 29, 2009, 04:14:51 PM » |
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I suggest looking at the most popular prototypes modelled. Equal tops are GWR and SR. Therefore the bent rail type of buffer stop would presumably be a good idea. Rather than having to bend actual rail for each, could a master be produced and brass castings be produced for the side components? After all, we do have those members familiar with producing brass castings.
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John Candy
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« Reply #8 on: November 29, 2009, 06:07:18 PM » |
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We did consider the possibility of using cast brass but the cost of the very large parts required in G3 was too expensive.
A well-known member of the Society is currently preparing four kits, kits for one for each of the 'Big Four' companies (using rail).
More details soon, the Committee will receive a progress report at the next meeting in 5 weeks time.
Regards,
John.
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