It will make an excellent model. The hopper ashpan (I assume that's what the downward extension between trailing coupled wheel and rear carrying wheel is) must have been a very advanced feature at the time of construction. Strange that superheating was initially omitted; there's a direct parallel with the contemporary UK equivalent, Ivatt's 251 class large atlantic (later LNER C1) of 1902. Although adequate for the work it was built for, these locos were dramatically improved when superheaters were subsequently installed.
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QUOTE (dwb @ 14 Nov 2007, 17:50) <{POST_SNAPBACK}>Could that have been due to the cost of licensing a patent?
May well have been. I remember reading that the Schmidt superheater came 'bundled,' there was other patent kit that also had to be used as a condition of the licence, applying to valve rings and lubrication. Can understand that being an issue on a class of hundreds of locos, but not so much on a relatively small class of prestige express machines. Some years later, the licence fee for the Kylchap exhaust ejector lead to the LNER only applying it to a relatively few locos, despite the proven benefit. Wide application only occured once patent rights had expired.
May well have been. I remember reading that the Schmidt superheater came 'bundled,' there was other patent kit that also had to be used as a condition of the licence, applying to valve rings and lubrication. Can understand that being an issue on a class of hundreds of locos, but not so much on a relatively small class of prestige express machines. Some years later, the licence fee for the Kylchap exhaust ejector lead to the LNER only applying it to a relatively few locos, despite the proven benefit. Wide application only occured once patent rights had expired.
QUOTE (dwb @ 18 Nov 2007, 11:38) <{POST_SNAPBACK}>Thanks for the information. There seems to have been a lot of work going on in that period all over Europe into how to make steam locomotives more efficient. It would be interesting to read an account that covered the whole of Europe and not just one country or region.
There is just such a book (only in German to the best of my knowledge) with a title on the lines of 'Der Dampf-Lok Welt-Historiches Teknik' (Global technical history of the steam locomotive). It's a long time since I looked at a copy, but it certainly appeared to be very comprehensive. Lovely information on things like 'Doppel-Crampton'!
There is just such a book (only in German to the best of my knowledge) with a title on the lines of 'Der Dampf-Lok Welt-Historiches Teknik' (Global technical history of the steam locomotive). It's a long time since I looked at a copy, but it certainly appeared to be very comprehensive. Lovely information on things like 'Doppel-Crampton'!
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