Search found 795 matches

by RET
Thu May 09, 2019 10:34 am
Forum: Live Steam
Topic: Super heated Steam Throttle Lag
Replies: 28
Views: 2848

Re: Super heated Steam Throttle Lag

Hi Dave, The 3 1/2" gauge Boston & Albany I have has three "hairpin" style stainless superheaters in it with a copper boiler. The firebox is 5" long, but the superheaters only extend 1 1/2" into the firebox. The locomotive is coal fired which gives a lot of radiant heat. Even with the little firebox...
by RET
Fri Apr 26, 2019 7:43 pm
Forum: Home Shop CNC
Topic: Sherline4400 G-coding
Replies: 2
Views: 955

Re: Sherline4400 G-coding

Hi, I'm not sure what you mean by "turning the calls." I'm not sure how you are set up, but I would suggest that you have a dedicated computer that doesn't do anything but run your lathe or mill (I would recommend using Sherline's computer because for the beginner, its one less thing to worry about)...
by RET
Thu Apr 25, 2019 7:40 am
Forum: Live Steam
Topic: Question about a DLS ad
Replies: 16
Views: 2971

Re: Question about a DLS ad

Hi Harold, You are right, the proper gauge for 7 1/4" would be close to 7 1/16," not 7 1/4" or 7 1/2." Now, 3 1/2" is close, but just a little under for 1/16 of full size. Don't ask me where 5" came from for 1/12 full size because I don't know. It is off by quite a bit. As a guess, it might have bee...
by RET
Wed Apr 24, 2019 9:45 pm
Forum: Live Steam
Topic: Question about a DLS ad
Replies: 16
Views: 2971

Re: Question about a DLS ad

Hi, gwrdriver has it right. Yes there are 5" gauge tracks in Canada, but there are 4 3/4" tracks as well. When you look at it, 4 3/4" is actually closer to scale for 1/12 full size, but for some reason, 5" became the world standard. Similarly, 7 1/4" is the world standard for 1/8 full size except in...
by RET
Wed Apr 24, 2019 9:06 pm
Forum: Live Steam
Topic: Are dynamos too noisy?
Replies: 25
Views: 3329

Re: Are dynamos too noisy?

Hi Greg, Actually, making the turbine is one of the easier parts. All you need is a blank wheel of the proper size and shape, a simple "G" code program in a Sherline CNC mill (or the heavier machine that I finally made for myself), a proper cutter to cut the individual buckets and then just sit back...
by RET
Wed Apr 24, 2019 8:28 pm
Forum: Live Steam
Topic: Are dynamos too noisy?
Replies: 25
Views: 3329

Re: Are dynamos too noisy?

Hi, Reading this over, I apologize for the way it sounds, but what I say there is still true. When you come right down to it, whether you put one of these on your locomotive is purely a personal decision, but I kind of like the idea of being able to turn a valve in the cab and have the headlight com...
by RET
Wed Apr 24, 2019 8:11 pm
Forum: Live Steam
Topic: Are dynamos too noisy?
Replies: 25
Views: 3329

Re: Are dynamos too noisy?

Hi, The topic of working turbogenerators keeps on coming up all the time on this website in various forms. There are two main threads for this subject, the first one is "Steam turbine generator" and the second is "Turbo generators." I have contributed to both of them. Most of the questions anyone ma...
by RET
Wed Apr 24, 2019 9:10 am
Forum: Live Steam
Topic: Valve for steam-operated drains?
Replies: 10
Views: 1592

Re: Valve for steam-operated drains?

Hi, The simple way is to make a small ball check valve with no closing spring and Install the valve on its side at the low point in the piping. This way, steam pressure will push the ball into position to close the little check valve and when the steam supply valve is closed, gravity will pull the b...
by RET
Tue Apr 16, 2019 9:48 pm
Forum: Live Steam
Topic: Steam Turbine Question
Replies: 10
Views: 1766

Re: Steam Turbine Question

Hi Phil, This is what I'm talking about. Turbine Wheela.jpg The jet hits the center of the wheel tangentially under the little "roof" that you see over each bucket pair. The roof guides the flow so it can't escape radially away from the wheel and the flow is split in two directions towards each side...
by RET
Mon Apr 15, 2019 7:11 am
Forum: Live Steam
Topic: Steam Turbine Question
Replies: 10
Views: 1766

Re: Steam Turbine Question

Hi, One thing in my post isn't clear. When I used the word "balanced," I was referring to the flow of the jet against the turbine buckets, not the balancing of the wheel itself although that is also quite necessary. The bucket design should be symmetrical and the bucket should split the jet flow int...
by RET
Sun Apr 14, 2019 11:09 pm
Forum: Live Steam
Topic: Steam Turbine Question
Replies: 10
Views: 1766

Re: Steam Turbine Question

Hi Phil, You might get it to work, but the design is all wrong to have it work well at all on either air or steam. First, the impeller (turbine wheel) should never fit the housing tightly anywhere (this is true for both air and steam). Second, The inlet (steam or air) jet must be tangential to the t...
by RET
Tue Apr 02, 2019 8:03 pm
Forum: Live Steam
Topic: From the ground up
Replies: 53
Views: 5236

Re: From the ground up

Hi, It is possible to build a Big Boy from the ground up in quite a bit less than a decade, all you have to do is what Gerhardt did. It also means that you basically don't do anything else . When he was building the Big Boy, Gerhardt was retired from Chrysler and living by himself across the back ya...