Discuss real world railway operations in this forum. Find out how to make your model railway as accurate as possible.
10 posts • Page 1 of 1
Been watching a couple of Youchoob videos about the steam locos still working in Chinese opencast coal mines, which have reminded me to ask about something which has always puzzled me. Most/a lot of them seem to have a "box" round the chimney. What's that in aid of?
I think that's probably the exhaust deflection system based on North American practise (the final designs of large Chinese steam borrow very heavily from North American concepts) often extended in the USA to form a 'Skyline' casing running the length of the boiler top to conceal all the tackle such as sandboxes, dome, steam manifold, safety valves...
Cheers Bigmet. One of the videos I was watching is this one https://www.youtube.com/watch?v=iZMnAvss89o and there's a good view of this box thing at 9' 25". I must admit I'm struggling to see how that works as a smoke deflector, but maybe it does with Chinese smoke ...
- Posts: 4898
- Joined: Sun Jan 12, 2014 9:58 pm
- Location: At the end....... and sometimes at the other end
muggins wrote:... there's a good view of this box thing at 9' 25". I must admit I'm struggling to see how that works as a smoke deflector, but maybe it does with Chinese smoke ...
Also North American smoke. There was a louvred 'air guide' at the front - and doubtless concealed gubbins inside - intended to create an updraft around the chimney and thus prevent the exhaust being entrained in the low pressure layer caused by airflow around the boiler. 'They' wouldn't let me climb up and inspect directly the one preserved specimen I have seen with this type of kit on it.
Who is online
Users browsing this forum: No registered users and 15 guests