Sweet William

This topic has 10 replies, 5 voices, and was last updated 1 March 2018 at 21:40 by James Roberts 4.

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25 February 2018 at 18:03 #343185
James Roberts 4
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@jamesroberts4
I was looking at building a Holmside but I also like the Sweet William. I understand they have a marine style steel boiler. What are these like to build and in use compared to a copper loco one. I would guess not as efficient at producing steam. What kind of load could it pull? As I’m after something that could pull me, the wife and the 2 young children. Ideally without stopping the engine after every circuit to recover.
Thanks.
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25 February 2018 at 18:03 #1682
James Roberts 4
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@jamesroberts4
25 February 2018 at 20:10 #343206
duncan webster 1
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@duncanwebster1
using steel instead of copper makes practically no difference to heat transfer or steam raising, the resistance is getting the heat from the flue gas to the metal, everything else is insignificant
25 February 2018 at 20:20 #343208
James Roberts 4
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@jamesroberts4
But there must be a difference between the 2 designs one being marine and the other a proper loco boiler?
Wouldn’t the steel one be more susceptible to internal corrosion?
25 February 2018 at 20:25 #343210
FMES
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@fmes
Hi James,

As a 7 1/4 gauge loco you won't really have a problem with it pulling, my 5" Sweet pea will happily tow three truck loads of kids both big and small, best record was 18 on a flat track, different kettle of fish stopping it.

All of the marine boilers are relatively easy to construct, and steel boilers steam just as well as copper in the bigger sizes, of course you do have to look after them more.

All the best with your project

Regards

Lofty
25 February 2018 at 20:26 #343212
Bazyle
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@bazyle
They can easily pull your family and dog too.

Edited By Bazyle on 25/02/2018 20:29:19
25 February 2018 at 20:42 #343220
duncan webster 1
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@duncanwebster1
Posted by James Roberts 4 on 25/02/2018 20:20:47:
But there must be a difference between the 2 designs one being marine and the other a proper loco boiler?
Wouldn't the steel one be more susceptible to internal corrosion?

I make no comment on the merits of marine vs loco firebox, only on steel vs copper in otherwise same design
1 March 2018 at 20:02 #343882
James Roberts 4
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@jamesroberts4
Has anyone fitted a steam dome to one to get a little more steam space and a drier spot to collect the steam from. Is that even possible with a steel marine boiler?
1 March 2018 at 20:26 #343888
FMES
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@fmes
Never found a need personally, and you would be altering the original design of the boiler which is often frowned upon by the Boiler Inspectors.

Regards

Lofty
1 March 2018 at 20:41 #343889
Billy Bean
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@billybean67480
Posted by FMES on 01/03/2018 20:26:35:

Never found a need personally, and you would be altering the original design of the boiler which is often frowned upon by the Boiler Inspectors.

Regards

Lofty

Still learning so excuse the question but Lofty has already stated it works perfectly as it is.

So James why would you want to alter a proven design?
1 March 2018 at 21:40 #343901
James Roberts 4
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@jamesroberts4
Just for more steam space to make it harder to run out and to provide dryer steam as it would be removed further from the water.
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