Why do model locomotive boilers have a hollow stay for the blower?
|Nick Clarke 3||15/11/2018 18:52:43|
684 forum posts
Looking at a boiler drawing (7 1/4 Tich) I was wondering why model loco boilers have a hollow stay for the blower. Is this a feature of full size boilers? as a simple pipe from the turret seems a far simpler solution.
or am I missing something vital??
|Jeff Dayman||15/11/2018 18:57:38|
|1792 forum posts|
Might be to send steam forward thru a hollow tube which is in the steam / hot water space. If a pipe was used outside the boiler the steam could condense. This would make a sputterer rather than a blower. 8^)
|122 forum posts|
My Maxitrak Swallow blower is a simple copper pipe from the steam Tee running outside the boiler . It works very well. Given the shc of copper I would suggest that after even a few seconds of passing steam the pipe temperature would be such that touching it would be a painful learning experience. It also has a VERY simple regulator sealed with a O ring. KISS Brian C
|duncan webster||15/11/2018 23:27:11|
2543 forum posts
Run the pipe next to the boiler under the cladding. I've seen completely external pipes emitting a mix of water and steam at the blower, but mine work fine
|Brian G||16/11/2018 06:52:19|
|672 forum posts|
According to Martin Evans (Evening Star, Argus Books, 1980) "LBSC did not usually specify any form of lagging or cleading for his boilers", which may explain his use of a hollow stay.
5139 forum posts
It is noticeable that continental locos, in fact almost all apart countries from British designed locos are festooned with external pipes. Unless they have some facilities that our magical locos don't need then it must be that our designers are finding ways to hide such pipes and they have all, including the blower feed on the outside. Yes?
|Ian S C||16/11/2018 09:32:54|
7468 forum posts
The steam locomotives of the New Zealand Railways are festooned with plumbing.
Ian S C
|Andrew Tinsley||16/11/2018 10:54:46|
|1066 forum posts|
Having worked on full size British and continental locos. All I can say is thank goodness for hanging everything out!
|Neil Wyatt||16/11/2018 10:58:13|
17722 forum posts
I recall the story of one British loco that used an external pipe for the blower, and it led to multiple burn accidents because it got used as a grab rail. I don't remember the solution.
Please login to post a reply.
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.
Click THIS LINK for full contact details.
For subscription issues please see THIS LINK.