Search found 799 matches

by RET
Thu Jul 18, 2019 8:13 pm
Forum: Live Steam
Topic: Air Compressor control
Replies: 11
Views: 1030

Re: Air Compressor control

Hi Dave, It doesn't really matter how you route the control piping from the main control valve as long as each valve (steam supply and dump valve) responds properly to the main control valve signal. Each valve must actuate when the main control valve shifts and return to its unactuated position when...
by RET
Tue Jul 16, 2019 12:24 pm
Forum: Live Steam
Topic: Air Compressor control
Replies: 11
Views: 1030

Re: Air Compressor control

Hi Dave, In case there is any confusion, here is a sketch of the circuit I described before. The basic concept can be tailored to any compressor of any size. Compressor schematic.jpg As you can see, there is a normally open valve in the compressor steam supply line. There is also a normally closed v...
by RET
Thu Jul 11, 2019 9:58 am
Forum: Live Steam
Topic: Air Compressor control
Replies: 11
Views: 1030

Re: Air Compressor control

Hi Dave, Clippard should have most of what you need and you can make what they can't supply. The control valve you will likely have to make, although you should be able to modify a Clippard spool valve. Since the Clippard valves are made to work on air, you should have no problems. They may even sel...
by RET
Mon Jul 08, 2019 7:37 am
Forum: Live Steam
Topic: Air Compressor control
Replies: 11
Views: 1030

Re: Air Compressor control

Hi Dave, I am assuming that what you are building is not a "simple" two cylinder compressor, but a working cross compound one. If that is the case, there are a couple of things to consider. First, apparently people who have built successful ones in 1/8th scale have made the steam side "simple" not c...
by RET
Thu May 09, 2019 10:34 am
Forum: Live Steam
Topic: Super heated Steam Throttle Lag
Replies: 28
Views: 4674

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: 1129

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: 3806

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: 3806

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: 4038

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: 4038

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: 4038

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: 1836

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...