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A CR 670 Class part 2


Dave John

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I have made a decent start on the body.

 

The boiler is in two parts, I would have preferred the boiler etch to go all the way to the smokebox front and have the firebox wrapper go round that. Way round it was to find a bit of tube the right diameter and make a ring to support the smokebox wrapper and solder that to the smokebox front. The boiler and its spacer band can then be formed to the diameter of the tube and just slide into the wrapper.

 

Someone will tell me I ought to buy a rolling machine. They would be right but, well one day. So the boiler is hand rolled.

 

Key to that is really taking your time, it is a half etch and very delicate. Annealed first then rolled bit by bit until its the right diameter. Sags a little where its cut out for the motor, but I have an idea about that once I am really sure of the exact motor cut out size.

 

The cab was fun. You can just see the brass fingers on the spectacle plate which are curved round to meet the roof. Solder generously and then file it back to a profile. I’m rather pleased with the way that came out.

 

I have also drilled holes. Lost of them. Pipes all over on this one.

 

Anyway, a rough progress pic. The boiler and cab are just sitting on the footplate, but all the tabs line up. Base of the chimney casting looks a bit plump too. 

 

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A badly photographed westinghouse pump assembly.

 

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Gearbox assembly and chassis next.

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  • RMweb Gold

A real beauty.

 

A boiler rolling machine, any tips for who does one of those?

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33 minutes ago, Mikkel said:

A real beauty.

 

A boiler rolling machine, any tips for who does one of those?

Most people (including me) have one of the sets of rollers made by GW Models. These are advertised in the MRJ every issue, and you have to order them the old fashioned way (a cheque in the post). 

 

£55 or £65 depending on the width of the roller. He does appear to do overseas postage.

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Aye, thats the type I would probably go for Pete. One of these days .... 

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If you have a lathe, turn a couple of discs to the right internal diameter. Tie the hand-formed boiler wrapper around them with soft iron wire, twisting the ends together to tighten the wrapper against the discs. Solder up. 

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I have a couple ready Regularity, but they will need a slot to clear the motor. I also made one up to suit the firebox , but its position will depend on how the motor sits and whether I can squeeze a flywheel in. 

 

Weight is going to be an issue with this one, so I don't want to block off possible voids that could be filled yet. 

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1 hour ago, Dave John said:

I have a couple ready Regularity, but they will need a slot to clear the motor. I also made one up to suit the firebox , but its position will depend on how the motor sits and whether I can squeeze a flywheel in. 

 

Weight is going to be an issue with this one, so I don't want to block off possible voids that could be filled yet. 

Drill holes in one of the spacers: feed a mixture of lead and epoxy (not PVA!) into it.

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Looks really nice Dave John.  I've also had issues rolling boilers with or without the aid of a rolling machine,  therefore, most of my later loco builds now have the boilers turned from solid brass with the boiler bands included. Sometimes I also turn the fire box and add a rivot detail wrap.  They usually need boring out to make room for the motor but the added weight really helps with traction.

 

01-Example.JPG.e0a88e43f53e7f34e4c3da15adf0f63d.JPG

02-Example.JPG.4d54ea3125ffafca02addb952eb07ff4.JPG

 

Snitzl

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That would be an ideal solution Snitzl, though I'm not sure my little old lathe would be happy with something as big as a whole boiler. 

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You’re making a fine job of that, it’s looking very good indeed!

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21 hours ago, pete_mcfarlane said:

Most people (including me) have one of the sets of rollers made by GW Models. These are advertised in the MRJ every issue, and you have to order them the old fashioned way (a cheque in the post). 

 

£55 or £65 depending on the width of the roller. He does appear to do overseas postage.

 

Thanks for that Pete, I didn't know GW Models had one of those in their range.  I see there's a fairly recent (late 2018) price list here: 

 

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33 minutes ago, Mikkel said:

 

Thanks for that Pete, I didn't know GW Models had one of those in their range.  I see there's a fairly recent (late 2018) price list here: 

 

I've had mine for a few years. I find that I don't use it very often, but it is incredibly useful when I do need it, as it makes rolling loco boilers really straightforward. 

 

 

 

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2 hours ago, Mikkel said:

 

Thanks for that Pete, I didn't know GW Models had one of those in their range.  I see there's a fairly recent (late 2018) price list here: 

 

 

There's a more recent one on the scale four forum.

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