WESES Road run

[8_10 Brass Cleaner]

Originally Posted by YA1177

Thats the same as what i thought.
ps. My ash pan fits like that.

Mine Isn't, but soon will be .

Wasting coal

[Steam Man]

Originally Posted by 3816

Wow, did he make a mess of that, couldnt find the drain cocks ?

Steve.

Actually I had sufficient fire to climb the hill with the damper closed and, a tight fitting damper always leaves white vapour; according to respected and reliable sources, that is the ideal way to ascend a hill?

You've got to be there to cock it up?

[3816]

Originally Posted by Steam Man

Actually I had sufficient fire to climb the hill with the damper closed and, a tight fitting damper always leaves white vapour; according to respected and reliable sources, that is the ideal way to ascend a hill?

You've got to be there to cock it up?

So all the other engines on the run got it wrong as they did not have large amounts of "white vapour" comming out of chimneys

Cant afford to go to this show !!!!! only £90 for 4 days and 40miles of travel !!!!!

Steve.

[Steam Man]

Originally Posted by 3816

So all the other engines on the run got it wrong as they did not have large amounts of "white vapour" comming out of chimneys

Cant afford to go to this show !!!!! only £90 for 4 days and 40miles of travel !!!!!

Steve.

Your words not mine; I said "according to respected and reliable sources, that is the ideal way to ascend a hill.

[Scooby]

Originally Posted by 3816

So all the other engines on the run got it wrong as they did not have large amounts of "white vapour" comming out of chimneys

Cant afford to go to this show !!!!! only £90 for 4 days and 40miles of travel !!!!!

Steve.

Just GO for the LOVE of STEAM

[Longguts]

Originally Posted by Steam Man

Actually I had sufficient fire to climb the hill with the damper closed and, a tight fitting damper always leaves white vapour; according to respected and reliable sources, that is the ideal way to ascend a hill?

You've got to be there to cock it up?

So i understand a white vapour commng away from exhausted steam is excessive water,noting that the engine is also blowing off i would guess that the boiler pressure is at 200 psi ? at this presure the steam should be carrying less water vapour than at say 100 psi so should not be visible at the exhaust . Also the exhaust noise of the engine changed several times during the accent of the hill, useing the "button" to gain sound effect? this would cause an engine to lift water if a little on the full side . This is how i understand it but if im wrong so be it , but all i do know to be fact is that our ashpan fits tight and doesnt give us this appearance on the road going up steep hills unless we are too full of water.

[Steam Man]

Originally Posted by Longguts

So i understand a white vapour commng away from exhausted steam is excessive water,noting that the engine is also blowing off i would guess that the boiler pressure is at 200 psi ? at this presure the steam should be carrying less water vapour than at say 100 psi so should not be visible at the exhaust . Also the exhaust noise of the engine changed several times during the accent of the hill, useing the "button" to gain sound effect? this would cause an engine to lift water if a little on the full side . This is how i understand it but if im wrong so be it , but all i do know to be fact is that our ashpan fits tight and doesnt give us this appearance on the road going up steep hills unless we are too full of water.

Can anyone clarify for me why mainline locomotives show white vapor when traveling with their dampers shut?

[adaminbt]

Originally Posted by Steam Man

a tight fitting damper always leaves white vapour;

Sorry - bit of a daft question but I was just wondering why a tight fitting damper would leave a cloud of white vapour?

If anyone could take the time to explain I would be very grateful

[Steam Man]

Originally Posted by adaminbt

Sorry - bit of a daft question but I was just wondering why a tight fitting damper would leave a cloud of white vapour?

If anyone could take the time to explain I would be very grateful

OK, I have a friend who is a retired physics teacher who, hopefully has sorted this issue out.

Steam or water vapour is only invisible below 100C; if a tight fitting damper successfully limits enough air entering the fire box to dampen the fire within it, then the exhaust gasses from the cylinders are emitted into the chimney. This allows the steam exhausted from the cylinders to cool more quickly, thereby reaching the critical (or visible temperature) of 100C when water vapour becomes visible, or precipitates. Conversely, climbing a hill with the damper open greatly increases the mix of firebox gasses mixing with cylinder gases, thereby raising the temperature well above the critical temperature for water vapour to be visible.

[mark lewis]

Looked and sounded good though, but then again it is a Burrell