and, what I have read over the years, the boiler has been a bit of a problem.
https://en.wikipedia.org/wiki/LNER_Peppercorn_Class_A1_60163_Tornado
[h=3][/h]Consideration of the
boiler began in late 1998.[SUP]
[40][/SUP] No standard gauge boiler had been built in Britain since the 1960s[SUP]
[39][/SUP] for such a large express locomotive. It was required to be based on the original LNER Diagram 118 design, but had to meet modern safety standards.[SUP]
[39][/SUP] Design changes included the cheaper modern-day fabrication method of a welded, rather than
riveted, firebox and boiler tube;[SUP]
[39][/SUP] the use of steel, rather than copper, for the firebox;[SUP]
[39][/SUP] and the aforementioned height reduction for OLE regulations.
While manufacturing facilities still existed in Britain to manufacture such a large boiler,[SUP]
[41][/SUP] because of the design differences from the originals the trust required a supplier with specific experience of designing, building and certification of steam engine boilers to modern safety regulations,[SUP]
[39][/SUP] as required by the
European Union's
Pressure Equipment Directive.[SUP]
[42][/SUP]
Meiningen Steam Locomotive Works, 2005
In early 2002, the
Deutsche Bahn Meiningen Steam Locomotive Works in Germany was identified as a suitable supplier.[SUP]
[39][/SUP] It possessed the required knowledge as mainline steam operation had continued in East Germany until the mid-1980s,[SUP]
[27][/SUP] 70% of its work still involved steam, and it still possessed the powerful plate roller machines. The trust did not have sufficient funding to place the order until January 2005.[SUP]
[27][/SUP]
On 16 July 2006 the boiler arrived by sea and was unloaded at Darlington with a 200-ton crane, having taken just nine months to build.[SUP]
[29][/SUP] The fitting of the 21-ton firebox and boiler unit to the wheeled locomotive frame was said to have been a
perfect fit, requiring no
grinding at all, a tribute to the accuracy of the design and construction by the Meiningen works.[SUP]
[41][/SUP] The fitting was not without incident though, as the extra weight caused some
compaction of the track bed, and assistance was required to move the locomotive back into the works, by a combination of being winched, towed by a
forklift truck and pushed with
Land Rovers.[SUP]
[41][/SUP]
A further modification to the boiler design has been the use of hollow stays. The stays support and separate the outer boiler and inner firebox. The hollow stays act as an indicator of any cracks in the otherwise inaccessible stays, such cracks being revealed by water leaks. Leaks have in fact been detected and have led to the locomotive being unavailable for service. In July 2010 while replacement stays were fitted, Mark Allatt, chairman, The A1 Steam Locomotive Trust, commented "Although the problems with Tornado’s boiler are part of learning about the locomotive in today’s operational environment, they are a source of great disappointment to all of Tornado's supporters and customers and our customers' passengers. We are working as hard as we can to bring Tornado back to full health as soon as possible and back onto the main line where she belongs." [SUP]
[43][/SUP]
Hey there Guest!
Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
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smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
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