GWR Steam Railmotor Chassis

CornCrake
Posts: 72
Joined: Sat Dec 05, 2015 2:03 pm

Re: GWR Steam Railmotor Chassis

Postby CornCrake » Sun Jul 28, 2019 12:20 pm

Hi Jeremy,

Looks like you're building up a head of steam now!

Will you be attending Railwells on Sunday?

If you are, would it be possible for me to purchase a railmotor chassis c/w bogie, and also is it possible to purchase an extra 8' bogie?

Regards Steve

Jeremy Suter
Posts: 145
Joined: Tue Apr 14, 2009 6:56 pm

Re: GWR Steam Railmotor Chassis

Postby Jeremy Suter » Wed Jul 31, 2019 7:46 pm

I missed this picture on my last post of the other side of the boiler.
IMG_5105.JPG


Now to the Roof

The roof is made of four main parts.
First two are for the base and need to be fitted together with screws so that they can be soldered together neatly and in the right position
IMG_5106.JPG

I am keeping the frame on at the moment and soldered some rail along the edge to keep it rigid and also have folded up the ribs for the roof profile.
IMG_5107.JPG

Now placing it on the body to make sure it fit, and the ribs are all level with the ends.
IMG_5108.JPG

This base produces the gutters and has a half etch line along the edge and slots so that the roof can be slotted in and held together for soldering.

I have taken the Roof pieces and put them through the long Role Bars to form the shallow middle section of the roof. Once rolled I have used a tight curve former and slotted it into the roll bars to hold it while I pull round the tighter curve with a steel rule.
IMG_5109.JPG

Notice I have also bent the tabs slightly so that they can easily be slotted into the base when pushed on from the top
IMG_5110.JPG

To get the very tight curve right to the edge I have put a 6mm rod in the bending bars and tightened with the roof in parallel then using the steel rule to push over and get the tight curve close the edge as possible.
Doing this with both pieces which have been half etched so the top layer has the rain strips on and the inner layer for strength
IMG_5111.JPG

The base has been made and was used as a former to check the curve of the roof.
IMG_5112.JPG

I should really attach the roof to the base but there is an error in the width it is slightly too wide 1.2mm or .6mm on each side. I could cut off the excess but when fitted to the base and put on the body the hole for the boiler top cover is 6mm forward of where it should be. Should have checked the measurements before sending to the etcher although I didn't expect to get the width correct first time.
IMG_5113.JPG

I will etch the new piece without such a big hole as this did get in the way of the tight curing.

DougN
Posts: 878
Joined: Wed Sep 01, 2010 9:57 am

Re: GWR Steam Railmotor Chassis

Postby DougN » Thu Aug 01, 2019 10:32 am

That is some serious metal forming Jeremy!I have only managed single arch roofs so far! :thumb
Doug
Still not doing enough modelling

Jeremy Suter
Posts: 145
Joined: Tue Apr 14, 2009 6:56 pm

Re: GWR Steam Railmotor Chassis

Postby Jeremy Suter » Tue Sep 10, 2019 1:42 pm

The Summer has been long and busy in the garden and this O gauge loco a GWR Armstrong is finally finished which has been blocking the work bench.
IMG_5152.JPG

With that now built and out the way I have been having another go at the roof on the railmotor I redrew several versions of the roof top both half etched and solid.
IMG_5154.JPG

The two solid ones have half etch lines on each side so it can be rolled round the tight curve at the edge. Using the same method as before I've rolled round the rods. but in the end they were slightly too narrow.
IMG_5158.JPG

IMG_5157.JPG

A new base was also done with the rib moved so its not in the space for the boiler.
IMG_5159.JPG

Using the two Half etched ones again rolled round rods to form the tight curve and roll bars to do the shallow part can then be slotted into the roof base I found the inner is slightly too narrow so scrapping that and just using the outer skin with rain strips etc on which fits about right.
IMG_5160.JPG

IMG_5161.JPG

Now slotted into base which has only been screwed together.
IMG_5162.JPG

IMG_5164.JPG

Now the Roof skin can be soldered to the base from beneath and when done the side bars and the screws can be removed. and I have also removed the inner section of the roof for the boiler access hole which was kept in to keep the curve of the roof consistent when rolling.
IMG_5170.JPG

IMG_5167.JPG

Now slotted onto the body and the boiler access cover has been added, next job is to make the lamp tops and fit some shell vents.

Any body know of a good source for the shell vents before i make casting patterns.

I have now started painting the body is in red undercoat as I am going to paint her in the Crimson Livery.
IMG_5171.JPG

ralphrobertson
Posts: 152
Joined: Wed Nov 27, 2013 3:57 pm

Re: GWR Steam Railmotor Chassis

Postby ralphrobertson » Tue Sep 10, 2019 2:33 pm

Well done Jeremy. Like the station building!

Ralph

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Noel
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Joined: Wed Jun 23, 2010 1:04 pm

Re: GWR Steam Railmotor Chassis

Postby Noel » Tue Sep 10, 2019 4:04 pm

Jeremy Suter wrote:I have now started painting the body is in red undercoat as I am going to paint her in the Crimson Livery.


I presume you are referring to the 1912-1922 livery? This was actually crimson lake, which is a very different colour to crimson, more or less maroon. In the case of the GWR this was a particularly dark version, apparently, referred to by Michael Harris as 'being best described as chocolate-lake'. The colour shown as Lake 1912 in the HMRS booklet of 1974 would agree with this, and is considerably darker than the colour used on the reconstruction of No. 93. Who is right, I don't know.
Regards
Noel

Jeremy Suter
Posts: 145
Joined: Tue Apr 14, 2009 6:56 pm

Re: GWR Steam Railmotor Chassis

Postby Jeremy Suter » Tue Sep 10, 2019 7:18 pm

Noel Wrote

I presume you are referring to the 1912-1922 livery? This was actually crimson lake, which is a very different colour to crimson, more or less maroon. In the case of the GWR this was a particularly dark version, apparently, referred to by Michael Harris as 'being best described as chocolate-lake'. The colour shown as Lake 1912 in the HMRS booklet of 1974 would agree with this, and is considerably darker than the colour used on the reconstruction of No. 93. Who is right, I don't know.

Hi Noel.
What ever the colour is, its coming out of the Phoenix Paint tin marked GWR Coach Crimson lake, I hope it is right as it looks very like the LMS Maroon. I did paint the body in chocolate and cream and lined it out just before going to Wells but the lining was not very good so I stripped it. I must remember not to do lining late in the evening when tired. It's also not quite in my time period as modelling just post WW1 to the grouping so would have to be ex works finish.
I must say I am not keen on the colour of the preserved one I think the colour needs to be darker/richer but you really can't tell from Black and White Photos it is also lined in cream rather than gold leaf.

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David B
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Re: GWR Steam Railmotor Chassis

Postby David B » Tue Sep 10, 2019 7:56 pm

This was the colour when I photographed it at Didcot in 2014.

Railmotor_g8515rw.jpg

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Noel
Posts: 1097
Joined: Wed Jun 23, 2010 1:04 pm

Re: GWR Steam Railmotor Chassis

Postby Noel » Wed Sep 11, 2019 10:01 am

The HMRS booklet I mentioned states "The staff in the locomotive drawing office and in the paint shop kindly produced and loaned colour samples to which the colour card was matched." Paint and print technologies being different, this is not an absolute guarantee, and it's certainly not contemporary with the period in question, but it's probably the nearest we're ever likely to get now.
Regards
Noel

CornCrake
Posts: 72
Joined: Sat Dec 05, 2015 2:03 pm

Re: GWR Steam Railmotor Chassis

Postby CornCrake » Fri Sep 13, 2019 5:40 pm

Hi Jeremy,
I have popped some spare MJT shell vents (short & tall) and MJT lamp tops in the post box for you (next collection 7am Saturday morning according to legend on box) so that you can inspect.
Hope it's not too late.
Steve


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