Re: About the model ~ CB&Q #537

Posted by Rick Steele on
URL: http://c-sng-discussion-forum.254.s1.nabble.com/CB-Q-537-tp550p601.html

One thing that I would caution all of you folks using the Burlington Bulletin mentioned on this and the No. 70 tender post.

Although the drawing rendered in the article is nicely rendered, it is wrong.

The stack on the 537 should be located directly above the cylinders, not ahead of them. On all of the Steam Locomotives that I am familiar with (and that's quite a few), the exhaust nozzle from the cylinders is located in the center of the cylinder saddle, so to maintain the proper draft, the stack is located directly above the exhaust nozzle.

The only exception to this general rule is the exhaust nozzle on the Mason Bogies which swung in an arc as the cylinders moved back and forth due to the articulation of the front truck. The swinging nozzle was located under the stack. This leads me to wonder if there was an elongated petticoat above it to funnel the exhaust properly. (George???)

Articulated locomotives like the 3985 are a different creature all together and without getting too technical, let us say that there are huge pipes with steam joints to take care of the problem, but once again, the exhaust nozzles (the UP Articulateds used a nozzle stand with over a dozen exhaust jets on each) are located directly below the stacks.

Rick