Search found 814 matches

by RET
Sun Dec 01, 2019 10:49 am
Forum: Live Steam
Topic: Which pressure gauge to use?
Replies: 27
Views: 1596

Re: Which pressure gauge to use?

Hi Glenn, Yes, the axial alignment of stack, blast nozzle and blower nozzle are very important, as well as the vertical positioning of the components. As you found out, misalignment of the components can really affect performance. Using the long paper strip is a simple and effective way to see what ...
by RET
Thu Nov 28, 2019 11:42 pm
Forum: Live Steam
Topic: Which pressure gauge to use?
Replies: 27
Views: 1596

Re: Which pressure gauge to use?

Hi, With the four small rectangular blast nozzles at the top of the blast pipe, there is space for the smokebox gasses from the lower part of the smokebox to come in between the jets and mix with them, then the combined mixture goes through the secondary petticoat at a lower velocity (conservation o...
by RET
Thu Nov 28, 2019 8:45 am
Forum: Live Steam
Topic: Which pressure gauge to use?
Replies: 27
Views: 1596

Re: Which pressure gauge to use?

Hi Glenn, Vacuums inside the smokebox will be quite low and likely would need an inclined manometer to measure. Using one of these while running the locomotive would be interesting, to say the least. I had a similar problem with the Boston & Albany locomotive about 20 years ago, but I went at it a d...
by RET
Fri Nov 15, 2019 11:40 pm
Forum: Live Steam
Topic: Pump o-rings
Replies: 14
Views: 1029

Re: Pump o-rings

Hi, There will be lots of different opinions on this, but here's what I do. The pump ram should be a close slide fit in the bore. A little play can be allowed, but the bore needs to be smooth because of the "O" ring. A reamed fit is OK. It also helps if the ram is made from stainless, but bronze is ...
by RET
Fri Nov 15, 2019 7:46 pm
Forum: Live Steam
Topic: Three Phase Generator Question
Replies: 15
Views: 2276

Re: Three Phase Generator Question

Hi, Yes I know that what I am really talking about is momentum (Mass times Velocity), but the point I'm making is that "Velocity" also has a directional component, so you will generate a force when you change the direction of the jet even if you don't change its speed and that the force generated de...
by RET
Fri Nov 15, 2019 9:43 am
Forum: Live Steam
Topic: Three Phase Generator Question
Replies: 15
Views: 2276

Re: Three Phase Generator Question

Hi, If you want to try out some possibilities, use a Dremel to spin up whatever generator you want to try. A Dremel can reach 30,000 rpm. which is the speed an efficient turbine wheel can reach (some can be even higher). This is an easy way to test out the generating possibilities of whatever unit y...
by RET
Wed Nov 06, 2019 9:39 pm
Forum: Live Steam
Topic: Run out of steam pressure after 100 feet
Replies: 27
Views: 3516

Re: Run out of steam pressure after 100 feet

Hi, When you were running under steam, did you ever move the Johnson bar back towards mid-gear (towards the middle of its travel)? Running with the bar all the way forward (or reverse) is very wasteful of steam because of the late cut off. I expect to get a little flack on this, but (especially on l...
by RET
Mon Nov 04, 2019 7:47 am
Forum: Live Steam
Topic: Run out of steam pressure after 100 feet
Replies: 27
Views: 3516

Re: Run out of steam pressure after 100 feet

Hi, Here is something you can try fairly easily. Pull the front off the smokebox. Move the Johnson bar to either full forward or full reverse. Roll the engine or turn the drivers until on one side the valve rod on the valve chest is either all the way out or all the way in. Stick a couple of rods th...
by RET
Tue Oct 15, 2019 8:24 pm
Forum: Live Steam
Topic: Driver machining order
Replies: 17
Views: 3344

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: 3507

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: 4622

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: 3881

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...