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by gwrdriver
Thu May 07, 2020 8:27 pm
Forum: Live Steam Marketplace
Topic: Coles New Corliss Engine (Not the original one)
Replies: 8
Views: 2050

Re: Coles New Corliss Engine (Not the original one)

BA,
Thanks for the post but that's the "old" (original) Coles Corliss and IIRC they listed a "new" Corliss in the years shortly before they closed.

BTW that Wayback archive is a great thing to have exist.
by gwrdriver
Thu May 07, 2020 3:42 pm
Forum: Live Steam Marketplace
Topic: Coles New Corliss Engine (Not the original one)
Replies: 8
Views: 2050

Coles New Corliss Engine (Not the original one)

I'm looking for information on the larger Corliss that Coles offered in the years before they closed. Simply a catalogue page, or any information on the origins of the design, drawings, and/or patterns would be useful.
by gwrdriver
Sat Apr 18, 2020 12:53 pm
Forum: Live Steam
Topic: Just a Note -- Don Ashton
Replies: 4
Views: 2028

Re: Just a Note -- Don Ashton

Very sorry to hear this.
by gwrdriver
Sat Feb 29, 2020 9:14 am
Forum: Live Steam
Topic: BR55/G8.1 Locomotive Project
Replies: 50
Views: 13506

Re: BR55/G8.1 Locomotive Project

I have adequate water leg circulation space on my current boiler (6"diam) but it wouldn't hurt to relieve those inside corners of the backhead and throat sheet per Dave's practice.
by gwrdriver
Sat Feb 29, 2020 9:07 am
Forum: Live Steam
Topic: K & S Metals of Chicago
Replies: 6
Views: 2542

Re: K & S Metals of Chicago

For years I could wander in, pick through the bin, and buy "drops" (bar ends) in any steel from the #1 local tool&die supply for 10¢/lb. Ahh those were the days, but I learned that a bar end could be a piece of junk, with folds, inclusions, and hardness. Also sometimes the material couldn't be ident...
by gwrdriver
Fri Feb 28, 2020 6:08 pm
Forum: Live Steam
Topic: BR55/G8.1 Locomotive Project
Replies: 50
Views: 13506

Re: BR55/G8.1 Locomotive Project

I don't do that, at least at that place. What I do is put a slight chamfer on the UNDERside of the lap, on the side I plan to feed solder to . . to give the solder an unobstructed entry point and draw it in. It also helps to leave the lap edge vertical on the solder feed-in side . . this essentially...
by gwrdriver
Thu Feb 27, 2020 8:47 pm
Forum: Live Steam
Topic: BR55/G8.1 Locomotive Project
Replies: 50
Views: 13506

Re: BR55/G8.1 Locomotive Project

Understood. For a reference, an ID of .455" would put you at the lower limit of the "optimal" range but still workable. I'm using the formula for optimal flue diameter to length ratio D²=L/50-75, where D=tube ID, L=heated length, and 50-75 is a numerical range between which you will optimize the bal...
by gwrdriver
Thu Feb 27, 2020 5:45 pm
Forum: Live Steam
Topic: Looking for input
Replies: 12
Views: 4014

Re: Looking for input

Re: Dockstader . . . I found Dockstader to be more of a "Proving" program than a design program. You first make a stab at designing the gear using whatever graphic capabilities you have, including mock-up building, and then test the results on Dockstader, adjusting to optimize the events. I first as...
by gwrdriver
Thu Feb 27, 2020 3:34 pm
Forum: Live Steam
Topic: BR55/G8.1 Locomotive Project
Replies: 50
Views: 13506

Re: BR55/G8.1 Locomotive Project

datman wrote:
Thu Feb 27, 2020 2:45 pm
gwrdriver: The flue length is approx 15 1/2".
Ian,
Using the formula for flue length to diameter, your flues will be optimized at .488" ID.
by gwrdriver
Thu Feb 27, 2020 8:57 am
Forum: Live Steam
Topic: BR55/G8.1 Locomotive Project
Replies: 50
Views: 13506

Re: BR55/G8.1 Locomotive Project

Ian, The 7/8" tubes should be adequate. What is your flue length, measure from inside head to head? Under the heading of "Making More Work for Myself" . . . I've considered trying concentric superheater elements, that is, where the supply line runs inside the return line. The elements would be relat...
by gwrdriver
Mon Feb 24, 2020 5:13 pm
Forum: Live Steam
Topic: Machining Cylinders - How to Do?
Replies: 21
Views: 4860

Re: Machining Cylinders - How to Do?

What!!?? Someone built a locomotive without a DRO?
by gwrdriver
Sat Feb 22, 2020 6:47 pm
Forum: Live Steam
Topic: Spoked wheels in CAD
Replies: 17
Views: 6760

Re: Spoked wheels in CAD

Then fillet until your heart is content. Make the fillets as large as your CAD software will allow. They need to be bigger than you think. Anthony, that's more like it! And I'm glad you brought this up . . . I was keeping my mouth shut, to avoid being seen as critical of something I've not done mys...