It is currently Thu Mar 28, 2024 3:41 pm

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 18 posts ]  Go to page Previous  1, 2
Author Message
 Post subject: Re: Boston and Maine #3713 progress
PostPosted: Thu Jan 27, 2011 5:35 pm 

Joined: Sat Dec 22, 2007 1:38 pm
Posts: 528
Location: New Jersey, Central
Gents, If 26 is any indication of the quality that Steamtown and the contractors can do, then I will be ready to bet she will roll out a "brand new" engine. Lots of work still to go on 26 but the shop guys are working hard on it.


Offline
 Profile  
 
 Post subject: Re: Boston and Maine #3713 progress
PostPosted: Thu Jan 27, 2011 8:04 pm 

Joined: Mon Mar 02, 2009 5:47 pm
Posts: 27
Thanks everybody for all of your encouraging news on this loco.


Offline
 Profile  
 
 Post subject: Re: Boston and Maine #3713 progress
PostPosted: Mon Jan 31, 2011 12:36 pm 

Joined: Fri Jun 10, 2005 9:07 pm
Posts: 81
Location: MA
Doug Debs 2472 wrote:
Wow! This makes the $250k boiler overhaul on 4-6-2 S.P. 2472 look like a small job - and it sure wasn't that way to us! (We installed new lower firebox side sheets, new superheater flues, and new tubes, and did the complete 49CFR230 inspection ["Form 4"] and certification).

Query - was B&M 3713 boiler built with one of the boiler-grade alloy steels popular in the 1930s (stronger - saved weight) that often - but not always, it depended on water quality, boiler pressure (250+psi much worse than 200psi), and other factors - proved more prone to cracking than plain carbon steel boiler-grade plate?

- Doug Debs

Doug:
I don't think high strength steel was employed but I may be wrong. That's not to say there weren't issues with cracking. The main cracking problems are near the check valve for the feedwater heater, which the B&M previously tried to repair unsuccessfully, and another crack in the dome liner. The reason the roof sheet needed to be renewed was because of decreased sheet efficiency; the B&M changed the type of flexible stay bolt sleeves that were used, without ever running the numbers to see what it did to the factor of safety.
Best
TMH


Offline
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 18 posts ]  Go to page Previous  1, 2

All times are UTC - 5 hours [ DST ]


 Who is online

Users browsing this forum: Google [Bot], SD70dude and 117 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to: