David111767
30in and Rack Railway Guy
i have been wondering this ever since i was little watching thomas the tank engine. how do engines like this work if the have no pistons???

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I wonder what would happen if they were able to put two cylinders outside and two cylinders inside.:hehe:
They do...they're called four cylinder engines.
And that is utterly, completely wrong. The whole weight of the engine is born by the wheels (however many) whether the cylinders are inside or outside. The weight diagram for the loco will show exactly what proportion of the total weight was carried by each axle (the 'axle loading'). For British locos the main coupled wheels carried between 16 and 22 tons each.Also, outside cylinders, I would think, would put more weight on the wheels, thus reducing derailments.
Never heard of them before (can we get a link to some info?) , but they sound like a PAIN to service...
Don't forget, we Brits invented the steam railway locomotive, so if we did it that way, it must have been good.![]()
true but there are not very many big or powerful ones, i never saw a big boy or a alleghenny (spelling) 2-6-6-6 over in the uk or anywhere in europe![]()