[modeleng] Re: 7.25" gauge L&B, Hunslet drawings and boiler construction
- From: peter <peter@xxxxxxxxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Thu, 23 Jul 2009 23:54:18 +0100
Rich,
Happy to. I am building a Port class Hunslet in 7.25" (1/3 scale). The
frames are laid and the boiler complete. I have a complete set of
drawings, they are by Roger Marsh. I live in Trowbridge and happy to
entertain visitors.
There is a Port Class at the Bredgar and Wormshill Railway, I was made to
feel very welcome and allowed to crawl all over and under to take pictures
and measurements.
I would give more details, but I am over 3000 miles away from my drawings
in Beijing although I fly back today (its 06:55 here).
e-mail me on peter AT puffernutter DOT co DOT uk and we'll see the best way
of communicating.
Cheers
Peter
On Thu, 23 Jul 2009 18:27:11 +0100 (BST), "R.L. Roebuck"
<rlr20@xxxxxxxxxxxxxxxx> wrote:
> Hi there All,
>
> I've a few observations and questions which I thought I'd throw out there
> to the group incase they drummed up any interesting conversation.
>
> 1) Whilst surfing the interweb last evening, I came across the following
> site detailing the construction of a Lynton and Barnstaple 2-6-2 in
> 7.25" gauge...
>
> http://www.mizensrailway.co.uk/Images/Loco/Locos/Davids%20Loco.htm
>
> ...this looks like quite an impressive beast, but I was a bit taken aback
> by the frame thickness of 20mm. Is this kind of thing the norm for Milner
> locomotive designs?
>
> 2) The thing I was actually looking for was drawings for some of the 4
> foot wheelbase Hunslet quarry locomotives formerly of North Wales. I've
> got hold of the book which is the respected source on the subject as
> talked about by this page...
>
> http://www.quarryhunslet.mste.co.uk/public/intro.php
>
> ...but only the drawings smaller and larger hunslets are detailed in the
> book, whereas the drawings for all but the smallest of the Penrhyn
> locomotives are missing. Does anyone have any ideas where drawings can be
> obtained from for the Penrhyn 'Large Quarry' and/or the Penrhyn 'Port'
> class hunslets? Ie...
>
> http://www.quarryhunslet.mste.co.uk/public/Bill_Harvey.php
> http://www.quarryhunslet.mste.co.uk/public/Winifred.php
>
> ...to me they just have the edge over the other variants which seem to
> be more commonly modelled.
>
> 3) In looking through a book detailing full size boiler construction, it
> looks like it was common place to construct a subassembly of inner and
> outer firebox all on one piece with backhead the throatplate fitted. Then
> as the final stages of assembly the boiler barrel, front tubeplate and
> tubes would be added. Why do we not do this in miniature? Am I missing
> something here - as we end up having a much larger mass of copper hot for
> the fitting of all the stays, all the backhead bushes, foudation ring
etc,
> whereas with the full size method they keep the size of the 'beast' down
> for all the fiddly bits, right up till the end of the job?
>
> Anyway, is there's anyone out there who fancies a bit of a chat on any of
> the above subjects?
>
>
> Yours,
>
>
> Rich.
> MODEL ENGINEERING DISCUSSION LIST.
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