Search found 806 matches

by RET
Tue Oct 15, 2019 8:24 pm
Forum: Live Steam
Topic: Driver machining order
Replies: 15
Views: 785

Re: Driver machining order

Hi, LBSC and Lester Friend gave a similar sequence which still makes sense today. Remember, both of them were talking back in the days where very few people had a mill of any kind, usually just a drill press and a lathe (usually either a South Bend -American or a Myford - English). Also, remember, H...
by RET
Sat Sep 28, 2019 10:18 am
Forum: Live Steam
Topic: side rod lubricators?
Replies: 15
Views: 1613

Re: side rod lubricators?

Hi, In this application, why not use Jack's idea, but put grease in it instead of oil. In the "old days," they used to have grease cups which had a fine thread cap and every once in a while, you gave the cap a quarter or half turn to lubricate the bearing that the cup was attached to. Very simple, a...
by RET
Thu Sep 26, 2019 7:29 am
Forum: Live Steam
Topic: Unexpected Injector Failure Cause
Replies: 22
Views: 2623

Re: Unexpected Injector Failure Cause

Hi, I have a stock of Viton "O" rings and they are an orangy brown in colour, not black. Remember, rubber expands a lot as the temperature rises and you need to take this into account. Also, if the "O" ring "pocket" is too tight, it would behave the way you describe. For instance, if I use an "O" ri...
by RET
Wed Sep 18, 2019 8:22 pm
Forum: Live Steam
Topic: To Turbulize or not
Replies: 12
Views: 2319

Re: To Turbulize or not

Hi, The width of the strip should be about 1/3 of the inside of the tube diameter so there is no possibility of blocking or slowing down the gas flow. 304 is a common 300 series stainless and the thickness isn't critical. Remember there is no mechanical force on these things so strength is not a req...
by RET
Wed Sep 18, 2019 7:42 am
Forum: Live Steam
Topic: To Turbulize or not
Replies: 12
Views: 2319

Re: To Turbulize or not

Hi Dave, The 5 or 6 bends are over the length of the strip however short or long it may be. The bend locations are not critical, even a sloppily made unit will work. The number of bends is also not critical, but 5 or 6 is a good compromise. Its a very simple device, but it works very well. In my hou...
by RET
Tue Sep 17, 2019 7:29 am
Forum: Live Steam
Topic: To Turbulize or not
Replies: 12
Views: 2319

Re: To Turbulize or not

Hi Dave, Yes a turbulator should make a difference, but if you are going to try one, try the zig-zag type instead of the twisted strip style. The zig-zag type is much more efficient. At one time I believe it was patented, but any patents should have run out a long time ago. The whole idea of a turbu...
by RET
Thu Aug 01, 2019 11:39 pm
Forum: Live Steam
Topic: Recommendation needed for copper boiler repairs
Replies: 15
Views: 2498

Re: Recommendation needed for copper boiler repairs

Hi Mark, If you got it up to 80 psi. and just had a few small leaks, its worth trying a hydraulic pressure test. After all, you don't have much to lose. Fill the boiler with water and use a hydraulic pump to add water. NEVER use air for a test like this, it is simply too dangerous! For our purposes,...
by RET
Thu Jul 18, 2019 8:13 pm
Forum: Live Steam
Topic: Air Compressor control
Replies: 11
Views: 2570

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: 2570

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: 2570

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: 2570

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: 6373

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...