Discussion in 'Steam Traction' started by AnthonyTrains2017, Feb 10, 2017.
8572 and the 'D' class ;-)
IIRC, CoT had clearance problems with those outside frame and weird external cranks and coupling-rods.
Could the 4-cylinder types be adapted to only use their inside cylinders?
Converted 9Fs or newbuild WD 2-10-0 alikes.
Nord of France ran two cylinder 2-8-2 tanks with 1.6 meter wheels to 75 mph (french legal limit) many times a day.
A Krauss-Helmholtz or Zara truck up front will make tracking as good as any pacific.
A low and a high pressure cylinder inside frames take care of clearance
Existing locomotives will be allowed on Settle -Carisle where 16 station platforms edges
has met an angle grinder.
9F's are out the equation for mainline running on account of their flangless centre wheel. We have talked about this on another thread.
Could we stick to the subject please!
Wouldn't be a bona fida Nat Pres thread without either
A) An argument/"discussion" about livery.
B) The inevitable Thread drift.
C) Something involving West Coast Railways.
Flanges will be put on centre driving wheels during conversion.
I must be dreaming....this is too insane for words...
Presumably useful on all the railways built by the Romans...
And on railways with roman ox cariot track gauge built by englishmen
There are very good reasons why 9F and WD 2-10-0s had flangeless centre driving wheels.
They wouldn't go around sharp curves without damaging the wheels or the track or both, or probably would have derailed, with flanged centre drivers
Everyone seems to be overlooking the American "Duplex" model. With that, a nice 2-6-6-4 requiring no flangeless wheels would be perfectly..... hold on, what has any of this got to do with the King class?
D) Someone laying siege to the front gates of Swindon.
Is the problem of the Kings and lesser brethern that they are difficult to shrink as fast as the loading gauge?
Remember that a Duplex has a rigid frame. To give clearance for the rear set of cylinders, the rigid wheelbase has to be longer than a similar locomotive with one set of drivers. Your 2-6-6-4 would have a coupled wheelbase close to or exceeding that of the Russian success story, the fabled 4-14-4.
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