GWR Steam Railmotor Chassis

Jeremy Suter
Posts: 121
Joined: Tue Apr 14, 2009 6:56 pm

Re: GWR Steam Railmotor Chassis

Postby Jeremy Suter » Sun Dec 30, 2018 10:00 am

Seasons Greetings to all and I do appreciate all the great comments which does give me encouragement to get on with this project.

As I have two pet hates with coach construction, I designed the body so that it becomes more rigid for handling and easy to fit the glazing without getting glue on the glass.

I have spent the holiday break catching up on this project by finishing all the etches I have drawn and got it running.
So that's The Motor Bogie. Available as kit. The 8' Fishbelly and the Underframe is now done just waiting for the Lost Wax Buffer Heads to arrive. Then I will do the Instructions. Lastly the body test etch, very pleased with this as a first attempt. The two main corrections to do are the partitions and one of the sliding door on the boiler end which I should have mirrored rather than copying.

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View of the 8' Fishbelly bogie with the castings on I have also fitted pickups to this end and will add an extra note on the Fishbelly instructions page as to how I did it invisibly.
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The end view showing it clearly has a tumblehome and also the Screw link Coupling which I did. The Vacuum Pipe I always make myself from .7mm wire with 36SWG copper wire wound round rather than use a casting which usually breaks when painted.
IMG_4613.JPG


I still need to add the Grab and Door Handles which I will do after painting although I have put on the Handle for the luggage compartment as this has a jig on the etch so that I could file bend round file flat the face, which I wanted to make sure it worked. I will remove it before painting.
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martin goodall
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Joined: Fri Oct 02, 2009 6:20 pm

Re: GWR Steam Railmotor Chassis

Postby martin goodall » Sun Dec 30, 2018 7:00 pm

I wonder if there may be some confusion in the nomenclature here?

A 'tumblehome' is an inward cant of the body sides above the waist line (originally a naval term for the inward slope of the hull of a wooden warship above the waterline). The term for the inward curve of a coach body below the waistline is a 'turnunder'.

The GWR autotrailers had a turnunder, but not a tumblehome. The Special Saloons had both. Off-hand, I can't remember whether the Dreadnoughts had a tumblehome (as well as a turnunder).

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Noel
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Re: GWR Steam Railmotor Chassis

Postby Noel » Sun Dec 30, 2018 9:14 pm

martin goodall wrote:The GWR autotrailers had a turnunder, but not a tumblehome.


Apart from the matchboarded railmotor conversions, which had neither in both incarnations.
Noel

Philip Hall
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Joined: Mon Aug 10, 2009 7:49 pm

Re: GWR Steam Railmotor Chassis

Postby Philip Hall » Sun Dec 30, 2018 11:54 pm

The naval stuff I’m familiar with; a lot of ships had a tumble home above the belting and flare (particularly at the bow) below. The preserved motor ship, Balmoral, sadly laid up right now in Bristol, is a classic example.

Now I know you shouldn’t take Wikipedia as concrete evidence, but that says that tumblehome in railway parlance can also be applied to Martin’s ’turnunder’! If a carriage has both, I’m inclined to Martin’s definitions, but it gets confusing...

Philip

Phil O
Posts: 205
Joined: Sun May 05, 2013 5:23 pm

Re: GWR Steam Railmotor Chassis

Postby Phil O » Mon Dec 31, 2018 6:12 pm

Jeremy,

That looks fantastic, what livery will you be painting it, I'm assuming that you will be painting it?

No rush in producing the kit, as I am involved in a swearing match with the Worsley Works Diag Q and R auto trailer etches, which are one step forward and 3 back!

martin goodall
Posts: 957
Joined: Fri Oct 02, 2009 6:20 pm

Re: GWR Steam Railmotor Chassis

Postby martin goodall » Mon Dec 31, 2018 7:08 pm

Noel wrote:
martin goodall wrote:The GWR autotrailers had a turnunder, but not a tumblehome.


Apart from the matchboarded railmotor conversions, which had neither in both incarnations.


Noel is absolutely right. I knew there were some exceptions, but forgot that this included the match-boarded railmotors and autotrailers.

Jeremy Suter
Posts: 121
Joined: Tue Apr 14, 2009 6:56 pm

Re: GWR Steam Railmotor Chassis

Postby Jeremy Suter » Sat Jan 19, 2019 9:52 am

Another step forward toward the kit has arrived from Slaters who have done some lost wax casting for me in nickel silver.
Is the buffer heads they have a neat hole in the end to find the centre for drilling out to fit the tale rod.

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Also included on the casting is a centre piece for the screw link couplings, still need to add the turning pole.

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The buffer heads cut off and drilled out with a .5mm drill and a Nickel silver wire added for the tale and a buffer spring added.
There is a pop mark in the centre part of the coupling so it can be drilled out with a .3mm drill and a wire added for the turning pole. The Pole has been folded over at each end and a blob of solder on to stop it coming out .

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Bufferheads added, the tale has been folded and runs in a slot to keep it straight. I have not added the cast coupling centre yet it still has the etched one.
Attachments
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Horsetan
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Joined: Tue Jul 29, 2008 9:24 am

Re: GWR Steam Railmotor Chassis

Postby Horsetan » Sat Jan 19, 2019 11:26 am

Wow :shock: :thumb
That would be an ecumenical matter.

Crepello
Posts: 88
Joined: Thu Jan 31, 2013 11:32 am

Re: GWR Steam Railmotor Chassis

Postby Crepello » Sat Jan 19, 2019 7:36 pm

Jeremy Suter wrote:Another step forward toward the kit has arrived from Slaters who have done some lost wax casting for me in nickel silver.

Is that a service they'll perform for anyone?

Jeremy Suter
Posts: 121
Joined: Tue Apr 14, 2009 6:56 pm

Re: GWR Steam Railmotor Chassis

Postby Jeremy Suter » Sat Jan 19, 2019 11:25 pm

Crepello Wrote
Is that a service they'll perform for anyone?

Yes they will but masters need to be made and soldered at high temperature to go through Vulcanisation mould process at 180 degrees. The costs are £20 for the mould and £2.80 per casting plus VAT.

MPR
Posts: 20
Joined: Mon Aug 11, 2008 9:34 pm

Re: GWR Steam Railmotor Chassis

Postby MPR » Sat Jan 19, 2019 11:35 pm

Very neatly done - these are especially vulnerable parts on a bow-ended vehicle and will be much more robust as well as functioning and looking better. Fantastic to see further progress on this fascinating design and build!


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