Construction of Houston Torpedo Boat, Spring 1865

rebelatsea

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#81
I have forgotten the exact placement of the blow down discharge, but think it was above the waterline. In a mass of fine detail, no mention is made of the smoke box in the two descriptions I have with me.
The smoke box on a steam loco can add as much as 5ft to the length of the visible "boiler" .
 

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rebelatsea

1st Lieutenant
Joined
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Messages
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Kent ,England.
#83
One source lists the length of the tubes (11 feet) and the other lists the length of the boiler (14 feet). The dates are 5 years apart; neither mentions the smoke box at all.
Dave,
The tubes are between the firebox throat plate and the boiler front plate, so that gives you the length of the boiler - 11ft, with a 3ft smoke box. That's not far off the one of our locos on the Romney, Hythe and Dymchurch.
 

georgew

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southern california
#84
Dave,
The tubes are between the firebox throat plate and the boiler front plate, so that gives you the length of the boiler - 11ft, with a 3ft smoke box. That's not far off the one of our locos on the Romney, Hythe and Dymchurch.
Dave,
The tubes are between the firebox throat plate and the boiler front plate, so that gives you the length of the boiler - 11ft, with a 3ft smoke box. That's not far off the one of our locos on the Romney, Hythe and Dymchurch.
At the risk of sounding really ignorant, what is the function of a smoke box and do you actually need one in a marine application?
 

rebelatsea

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#85
At the risk of sounding really ignorant, what is the function of a smoke box and do you actually need one in a marine application?
The smoke box on a steam loco collects the fine ash drawn through the tubes. it falls to the bottom and can be shovelled out. The blast pipe and blower ring are also in the box. They create a vacuum in the box and assist the draw on the fire. Most marine boilers were return flue so that the exhaust was above the furnaces, hence the reason for the black clouds of smoke consisting of fine ash mixed with hot gases. Some ships has separate steam pipes, most often seen in Western riverboats, but most warships had the steam exhaust from the cylinders fed into the funnels.
 



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