Mystery boiler

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Mystery boiler

This topic has 7 replies, 5 voices, and was last updated 13 June 2020 at 20:18 by Alexander Smith 1.

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10 June 2020 at 18:25 #478958
Alexander Smith 1
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@alexandersmith1
Can anyone help to identify this mystery loco boiler. It's 18 5/8" long overall and 4 3/4" diameter. There are 4 x 3/4" diameter tubes plus 16 x 7/16" tubes and a 3/4" thick walled regulator tube. The outer firebox is 6 1/2" long by 5 3/8" at the base and the inner firebox is 5 3/4" x 4 5/8" . The backhead is 6" high and the inner firebox is 4" high. There are 2 crownstays and a third longitudinal stay along the crown of the firebox. Anyone any idea what loco this boiler might be for – no one at my Club could suggest anything but several members felt the firebox was very shallow (much shallower than my Pansy boiler although overall it's a very similar size. 12" rule in the photos for comparison.

Thanks Sandy
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10 June 2020 at 18:25 #1941
Alexander Smith 1
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@alexandersmith1
10 June 2020 at 20:08 #478985
Jon Lawes
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@jonlawes51698
I'm fairly ignorant in these matters, but I don't let that hold me back.

The shape of the firebox looks quite LNER if that helps to narrow it down (or insert a red herring).

**LINK**
11 June 2020 at 09:37 #479052
Nigel Bennett
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@nigelbennett69913
Like Jon, I thought LNER too. It's similar to a Maisie, but with a different tube arrangement. The firebox is also quite a bit longer than Maisie, but overall boiler length is about the same. Maisie does have a sloping throatplate, It might therefore foul the trailing wheelset of a Maisie chassis. Good luck with whatever you do with it!
11 June 2020 at 13:37 #479101
Nick Clarke 3
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@nickclarke3
LNER boilers had sloping throatplates so I an tempted to suggest it might be for Martin Evan's Canadian 0-8-0 design Caribou (or 2-8-0 Buffalo)

The boiler was described in ME vol 128, No 3218, 14th March 1963, pp335 et seq and in following issues
12 June 2020 at 10:37 #479272
Alexander Smith 1
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@alexandersmith1
Many thanks to all for the helpful suggestions. My Club has a complete set of Model Engineers but unfortunately during lockdown I can't get at them. Does anyone have plans for Caribou or Buffalo who could let me have the relevant dimensions or a copy of the page of the magazine mentioned above. Thanks. Sandy
12 June 2020 at 18:10 #479381
peter ravenscroft
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@peterravenscroft57700
hi alexander

that is a caribou/buffalo boil i have the construction book

regards

peter
13 June 2020 at 20:18 #479669
Alexander Smith 1
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@alexandersmith1
That's fantastic Peter. Thanks for confirming the identity of the boiler and thanks also to everyone who helped- this is a really amazing site. If I send you a PM, Peter, would it be possible to let me have a copy of just the boiler plan- I can't take on any more projects so this boiler will have to go to someone who can make use of it. I got it for more or less the scrap copper price so if anyone us building Caribou it would be a very cheap boiler.Sandy
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