Search found 752 matches

by RET
Sun Nov 11, 2018 11:43 pm
Forum: Live Steam
Topic: Bucyrus steam crane
Replies: 12
Views: 694

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: 1967

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: 1967

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: 37
Views: 2304

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: 37
Views: 2304

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: 37
Views: 2304

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: 1379

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: 1011

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...
by RET
Tue Sep 25, 2018 9:16 am
Forum: Lathes
Topic: Rebuild a Heavy 10L or add a small lathe?
Replies: 12
Views: 1153

Re: Rebuild a Heavy 10L or add a small lathe?

Hi Dianne, The headstock bearings on my South Bend also have a few thou play, but if I try to tighten them up by playing with the shims, the bearings start to run a bit warm. Plain bearings need a little clearance to work. I find I can do anything I want with the machine. Some people have made a car...
by RET
Mon Sep 24, 2018 7:18 pm
Forum: Lathes
Topic: Rebuild a Heavy 10L or add a small lathe?
Replies: 12
Views: 1153

Re: Rebuild a Heavy 10L or add a small lathe?

Hi Dianne, I have a 13 1/4," WW2 South Bend. It has more wear on the bed than yours but still does a good job. The spindle bearings are OK. However, I had a problem with the cross slide dovetails being "hour glassed" so I made a cutter to match the dovetail angle and used the Bridgeport to remachine...
by RET
Sat Sep 22, 2018 6:36 pm
Forum: Live Steam
Topic: L.E. American & Feedwater?
Replies: 22
Views: 2073

Re: L.E. American & Feedwater?

Hi Dianne, You may have a number of problems. First; yes you definitely need to limit the ball travel. If you don't, it takes too much time when the ram reverses for the pump suction to pull the ball back onto the seat. Look at it in terms of ram travel vs ball check travel. If the ball lifts a lot,...
by RET
Sun Sep 16, 2018 10:08 am
Forum: Live Steam
Topic: Live Steam CNC Defender
Replies: 17
Views: 2113

Re: Live Steam CNC Defender

Hi, CNC doesn't really need defending, but it does open up a whole new world. Things that can be very difficult or impossible to do with conventional machines are easy with CNC. Even writing "G" code isn't hard until you get into the really complex stuff. CNC doesn't replace conventional machining, ...