The Home Machinist!

Jesse,
Not yet having seen your photo my guess is that these are what I have lerned are "thermic siphons".

Tel, This is my solution, O-ring plugs tapped for the test rig. A little elaborate maybe but then I have to test these things on a fairly regular basis and take them well above normal test pressure just to be sure. I've had one boiler fail from a faulty cross tube. One solder joint had a pinhole fau...

Then Fox m'boy you were misinformed - they are a great advantage, if applied properly and done right. There isn't much of a repair "problem" because if they leak the boiler's done for and can't be repaired, except without a great deal of trouble (and therefore expense), so the remedy is to...

In small scales (Ga1) where center flue boilers are common, "cross-tubes" have been used for some time for dramatic improvement in heat transfer, water circulation, and increased water capacity.
The picture is of a center flu assembly for a 2" diameter Ga1 boiler.

See the Wanted/For Sale Board

John,
Let prospective builders know there are new updated prints & templates available for the copper boiler for the 2-6-6T.[img]/ubb/images/graemlins/grin.gif"%20alt="[/img]

Doozer, I have made two D1-3 camlock backplates and from looking at my lathe, and the published specs of the D1-3, I saw that in order for the taper to fit as you describe, on both the taper AND on the nose, every taper on every D1-3 machine and in every D1-3 accessory would have to be made to an ex...

Ok, apm and Goober Chris have given us two lucid and well put but opposite definitions of the terms. Which one is it? [img]/ubb/images/graemlins/grin.gif"%20alt="[/img]

Charles, Without sitting down with a current edition of both books and going over them in detail, which I have neither the time nor inclination to do at the moment, my sense is that they say very much the same thing although the scope of the Evans book is narrower in that he concentrates on locomoti...

Charles,
Kennedy Swan (Durham UK), best known as designer and builder of the locomotives Bridget, Jesse, and Wren, also designed the Koppel in 7+ga which was serialized in Engineering in Miniature. IIRC this was a geared siderod rack & adhesion lomotive and a complex piece of work.

Blackie, I don't know that one is a better book than the other as they are different animals aren't they? For those interested, the K.N.Harris book principally addresses design of boilers of various types and sizes, including fittings and auxiliaries. Alec Farmer's book on the other hand addresses c...

PS, I found and bought a copy of Harris' boilermaking book. I plan to read it on vacation at the end of the month. YOU GET A VACATION!! Some blokes catch all the luck. I'm not sure what changes are in the newest edition but the older ones have some information that's become obsolete, or maybe I sho...