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How long do you have to wait before the smoke clears?


JJ73

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How long do you have to wait before the smoke clears?

I will suggest a very long time indeed!

For a single track line, the locomotive will act like a loose fitting piston.

The locomotive will draw air from the tunnel, pulling the smoke with it.

At first, I thought the smoke would continue for at least as long as the locomotive took to drive through the tunnel.

But the locomotive is not a perfect seal to the tunnel, so it should take quite a bit longer than the locomotive took to drive thru the tunnel.

++++

The smoke was the reason why cab-forward steam locomotives were used in the USA. The enginemen were being suffocated on the smoke. The solution was to put the footplate (cab) forward of the chimney.

Bee

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Bee, I take it that these locos were oil fired or used ground coal fed into the firebox from the tender like some of the USA built SNCF locos? The firebox is next to the cab so the engineer must have been controlling something delivered the whole length of the loco from the tender behind.

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