[modeleng] 0-4-0 Hunslet drawings (Dinoric Port versus Penrhyn Port classes)

Hi there Peter,

Thanks for the offer. I wonder though whether this slightly highlights my 
problem.

The loco you refer to at Bredgar is...

http://www.bwlr.co.uk/locos.php?flag=lj

...which is the Dinorowic version of the Port class, which has something 
like a 3 foot 3" wheelbase in real life.

Whereas the Penrhyn Port class was a different beast, with a 4 foot 
wheelbase and a dropped footplate, not to mention lower corners of the 
buffer beam rounded off with a very large radii, see...

http://www.quarryhunslet.mste.co.uk/public/Winifred.php

(though one shouldn't attribute too much to the lack of a cab as they were 
semi-easily-detachable.)

I may be wrong here, but I think the Port designation refers to the wheel 
diameter and cylinder sizing, relating to tractive effort, not to a 
particular design. In the same way that Estate cars tend to be more 
powerful that a Sub-sub-compact (to use the American designation).

I don't suppose the Milner drawings cater for this longer version?

Yours,


Rich.

On Thu, 23 Jul 2009, peter wrote:

> 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.
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