Building an MMP RMB - a box of delights

Bob Reid

Bob Reid

Western Thunderer
The chains don't look to bad as they are Heather... All except the steam hose suspension chain were conventional oval or twisted link chains - the steam hose one being a rather more bespoke model....!

Auto Coupler Release Chain 3'-5 1/8" (min) 3-6" (max) 1/4" dia. twisted chain
Auto Coupler Support Pin Chain - 10" long 3/16" dia. twisted chain
Buffer Saddle Chain - 1'-4" long 1/4" dia. twisted chain.
Dynamo Safety Chain - 2'-8" long (12 link) oval chain.

Steam Hose Suspension Chain - 1'-5 1/8" long.
steam_chain.png
 
Bob Reid

Bob Reid

Western Thunderer
Glad I can be of some help Heather! Soon to follow - and a passion of Dog Star's - the Dual Braked arrangement - and the ETH distribution fuse box (about the only externally visible ETH change beyond the jumpers and fixed end boxes etc.....
 
Heather Kay

Heather Kay

Western Thunderer
Buffer beam number two is now complete.

I followed the chain dimensions Bob kindly added, but ended up adding a scale foot or two on occasions. In my case, I allowed for a small loop at each end to pass through the fixings, which adds a little to the overall length. For the coupler release chain, though, even my addition proved too little. To give the characteristic sag, and allow some sideways movement on the coupler, things were a fair lick longer in the end.

So, on to the cosmetic buffer frame extensions, and the ETH bits.
 
T

Temeraire

Western Thunderer
These really are stunning kits and you're making an excellent job of it so far Heather.

I'd love to give a GUV or BG of David's a whirl but I fear my soldering skills just aren't up to it. I have one of his Dogfish wagons that I've made a start on but not sure I can do it justice. Time will tell!
 
Heather Kay

Heather Kay

Western Thunderer
Temeraire said:
I'd love to give a GUV or BG of David's a whirl but I fear my soldering skills just aren't up to it. I have one of his Dogfish wagons that I've made a start on but not sure I can do it justice. Time will tell!
Click to expand...


Practice makes perfect. :thumbs: Don't forget I've opted to solder where gluing would work instead.

It's obvious David is a big fan of the Mk1 design.
 
D

djparkins

Western Thunderer
Heather Kay said:
It's obvious David is a big fan of the Mk1 design.
Click to expand...

I am - Mk.1 & Bulleid stock. For three years I was out on the trains virtually every Saturday & Sunday getting as much Bulleid Pacific haulage as I could between Autumn '64 & Summer '67. My dear departed mother would have had kittens if she had known that her 11 year old son was actually at the end of Platform 11 at Waterloo or at Eastleigh or Salisbury, rather than on Bournemouth Central station up platform [where I was given strict instructions to stay!].

When steam finished on the Bournemouth line I thought she was being most unreasonable when she stopped me going up to Carnforth, Lostock Hall & Rose Grove - I mean I was 14, going on 15 by then after all!
 
Heather Kay

Heather Kay

Western Thunderer
Again, slow progress but I think the buffer beams are now properly complete.

IMG_7619.jpg

Hidden in the murk is the ETH socket. Studying as many photos of ETH Mk1s I could find, I worked out the connectors were mounted more or less on the centreline of each buffer on about the only practical surface available, which was the brackets designed to transfer the buffing forces into the central truss. I am sure someone, somewhere, will come up with something that disproves my observations, but it looks right to me.

IMG_7617.jpg

Here's t'other side and end. It looks suitably cluttered, I think. Once the body has been fitted, I'll add the cable and plug for the ETH.

IMG_7622.jpg

I'm happy with that - aside from the wonky buffer! They're not actually fixed in place yet. As with most of Richard's coaches with the retracted buffers, the heads will be glued in.

I'm keen to get some paint on things, but I'm going to be patient a while longer. Next on the list of things to do is the brake rigging. If Bob has managed to draw up the air brake/cross shaft arrangement, I can set about fitting the various bits. After that, the battery boxes, gas cylinder cabinets, the dynamo and other electrical fittings.

One month I might get onto the bodywork!

Anyway, having reached this point, I am going to give this build a short rest and return to the 57xx.
 
Heather Kay

Heather Kay

Western Thunderer
Dog Star said:
Um, as you are doing this model as a GWR example then the correct designation ought to be "5700 class" as the 57xx description would appear to be a post WWII idea.
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Generally speaking, I appreciate the nod to accuracy, but since I'm definitely post-WWII myself I think I'll go with my 1958 Observer's Book of Railway Locomotives of Britain style: "57xx" Class. ;)
 
Dog Star

Dog Star

Western Thunderer
[topic_hi_jack=ON]

An EZ-build RMB, diagram 98/99, is under construction in the near vicinity... and the owner has posed some questions to which I do not know the answer.

Which diagram 98/99 carriages were allocated to or ran on the BR(SR)?

Which RMB carriages were fitted with Commonwealth bogies in the period 1965 to 1975?

Bob - all RMBs built with equalised brake gear and hence assymetric v-hangers?

thank you and regards, Graham

[/topic_hi_jack=OFF] (until the next time)
 
Bob Reid

Bob Reid

Western Thunderer
Graham,

For the RMB allocations to the Southern Region see Mark Brinton's (SEMG) details in this file http://www.semgonline.com/proto/BRSCarriages1_5.pdf from page 22 on.

By the end of 1975, All of the vehicles that had been fitted with CW bogies when built with the exception of withdrawn RMB 1828 still had them fitted i.e.
Lot 30520 1813-1837
Lot 30670 1853-1864
Lot 30702 1865-1882

Yes, they all had Compensated & Equalised brakegear with asymmetrical vee hangers when built...
 
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