Stays

Discussion of steam locomotives from all manufacturers and railroads

Moderators: slide rules, Typewriters

Stays

Postby Steffen » Thu Mar 15, 2012 2:27 pm

Hello,
I have a question. I read an article about the Gettysburg Boiler explosion and I wondered about the stays...

We in Germany use straight stays with threads only on copper fireboxes. The stays were screwed in and the end is widened and the edges hammered to seal the thread.
Boilers with iron fireboxes have welded stays, some straight, others were drop forged as given by the Henschel engineer Tross, who invented those double thickness stays. Flexible stays had a knucke head, placed onto a ring and sealed with a welded on cap.

But what are mentioned US straight thread stays and what are button head stays - and how they were mounted? Are all US stay bolts screwed in the material? Don't you used welded stays?
Allways keep two-thrid level in gauge and a well set fire, that's how the engineer likes a fireman
User avatar
Steffen
 
Posts: 105
Joined: Thu Jun 18, 2009 11:46 pm

Re: Stays

Postby Cactus Jack » Wed Apr 04, 2012 1:10 pm

I believe that traditionally the US has used threaded stays and it was not until the "Chinese Steam" arrived in the late 1980's that US regs allowed for welded stays but I could be wrong. I think that the button head stays refer the flexible staybolts used in the crown sheet.

Rigid threaded stays traditionally are installed as you descibe in your copper fireboxes.

Hopefully some else can weigh in on this for more clarification.
Cactus Jack
 
Posts: 755
Joined: Tue Apr 13, 2004 12:45 pm
Location: finally back in Upstate New York

Re: Stays

Postby GSC » Sun Jul 08, 2012 9:39 am

In the US, welded stays were introduced when welding qualities improved. World War Two caused so many technological strides and welding was one of them. Later locomotive boilers featured both threaded and welded stays. The threaded stays went in and out easier, the welded stays required more work to install and remove.

Button-head stays are flexible, and have more range of movement due to expansion and contraction, as mentioned above.
Tonight's forecast - dark. Followed by scattered light in the morning.
GSC
 
Posts: 1621
Joined: Wed Jan 30, 2008 2:10 pm
Location: NY&LB MP 29.2


Return to Steam Locomotives

Who is online

Users browsing this forum: No registered users and 2 guests