Search found 756 matches

by RET
Thu Nov 29, 2018 9:53 am
Forum: Live Steam
Topic: What type of Drill Rod for Axles?
Replies: 33
Views: 2473

Re: What type of Drill Rod for Axles?

Hi rkcarguy, Thanks for the explanation. The design you are proposing should work just fine and its simple to do. If you are going to use a standard ball bearing, just make sure you use a sealed bearing that is pressed into the axlebox. You could also use the bolt (or capscrew) to hold the hardened ...
by RET
Tue Nov 27, 2018 11:46 pm
Forum: Live Steam
Topic: What type of Drill Rod for Axles?
Replies: 33
Views: 2473

Re: What type of Drill Rod for Axles?

Hi rkcarguy, I just checked and sorry but you lost a "0." Hey, this is easy to do. I goof up too. For the bolt in question, the ultimate shear strength is close to 100,000 psi. Even mild steel has a yield strength of about 55,000 psi and a shear strength of about 45,000 psi. While your suggestion fo...
by RET
Tue Nov 27, 2018 5:34 pm
Forum: Live Steam
Topic: What type of Drill Rod for Axles?
Replies: 33
Views: 2473

Re: What type of Drill Rod for Axles?

Hi, Pat 1027 wrote "What effect does out of round drill rod have?" OK, I don't consider myself to be a REAL expert, but I'll try to answer your question. If you consider a "plain" bearing (one without any rolling elements, just a shaft in a hole), if the rpm is high enough and the bearing is oil lub...
by RET
Mon Nov 26, 2018 5:28 pm
Forum: Live Steam
Topic: Steam-operated cylinder drains
Replies: 13
Views: 1669

Re: Steam-operated cylinder drains

Hi Kimball, In Fred's design, your answer is "yes," it would be possible, but not in Bill's variation because the "O" ring is on the "piston." However, since the controlling steam would be piped equally to all the cylinders, the locomotive would not move because the pressure would be the same on bot...
by RET
Sun Nov 11, 2018 11:43 pm
Forum: Live Steam
Topic: Bucyrus steam crane
Replies: 12
Views: 1420

Re: Bucyrus steam crane

Hi Hoppercar, Just for clarification, are you talking about the 250 ton capacity Bucyrus Erie "Big Hook?" If you Google "Railroad wrecking cranes," you will find quite a few pictures. It seems that Bucyrus Erie made them for a number of railroads. Like all cranes, full rated capacity is only achieve...
by RET
Sat Nov 03, 2018 9:59 am
Forum: Live Steam
Topic: Pre heating boiler water
Replies: 38
Views: 3408

Re: Pre heating boiler water

Hi, Apparently many of the later locomotive boilers with top feed had an oblong tray mounted inside the boiler under the top feed discharge. The water from the top feed went into this tray and immediately boiler steam would condense into the added water to bring it up to boiler temperature, thus avo...
by RET
Fri Nov 02, 2018 9:41 am
Forum: Live Steam
Topic: Pre heating boiler water
Replies: 38
Views: 3408

Re: Pre heating boiler water

Hi, If you look at the numbers, preheating boiler water doesn't do a lot for efficiency in our models, but if you want to be true to prototype, go for it! Those of you with an engineering background will know that it takes 512 calories of heat energy to turn one gram of water into steam at atmospher...
by RET
Fri Oct 26, 2018 11:28 pm
Forum: Live Steam
Topic: Using a steam indicator
Replies: 40
Views: 4787

Re: Using a steam indicator

Hi k4kfh, Both apm & Dick Morris are offering you very good advice. One way would be to mount the pressure sensor on an extra cylinder head, do an internet search for "Arduino miniature linear position sensor" and you should come up with the DFRobot website which has a potentiometer position indicat...
by RET
Sun Oct 21, 2018 9:55 am
Forum: Live Steam
Topic: Using a steam indicator
Replies: 40
Views: 4787

Re: Using a steam indicator

Hi, To make your steam connection, the easiest way would be to drill a 1/16" hole through the cylinder cover and make your pressure sensor connection there. As a temporary measure, you could epoxy the sensor onto the cover to hold it in place. Try and get the smallest size sensor possible because of...
by RET
Sat Oct 20, 2018 2:50 pm
Forum: Live Steam
Topic: Using a steam indicator
Replies: 40
Views: 4787

Re: Using a steam indicator

Hi, Using a superficial Google search, it seems a steam indicator recorded the cylinder pressure vs stroke for at least one complete revolution of the crankshaft. Multiple revolutions should simply repeat the line drawn, provided that the load on the engine, throttle position and boiler pressure are...
by RET
Fri Oct 19, 2018 11:06 pm
Forum: Live Steam
Topic: Forum Board Statistics
Replies: 14
Views: 1921

Re: Forum Board Statistics

Hi, This may be slightly off topic, but I feel that it is appropriate. I don't know about the rest of you, but because I'm interested, I check the chaski website and in particular the live steam section at least once a day just to see what is new and under discussion. If I feel that I can contribute...
by RET
Fri Oct 05, 2018 9:21 am
Forum: Live Steam
Topic: dual crosshead pump plumbing?
Replies: 8
Views: 1187

Re: dual crosshead pump plumbing?

Hi, Because they are crosshead pumps, the pumping action will be 90 degrees out of phase so each pump is going to need its own inlet and discharge check valve. If they don't, the pumps will still work, but at a much lower efficiency (about 50%). They can be piped together as shown, but only after th...