Search found 829 matches

by RET
Fri Mar 13, 2020 7:14 am
Forum: Live Steam
Topic: OCME Club Suspends Public events
Replies: 29
Views: 2033

Re: OCME Club Suspends Public events

Hi, Unfortunately Harold, you are right and the first part of the video that Jose sent covers things pretty completely. I use the BBC News website to see what is going on in the world because they seem to be about as unbiased as you can get. The only good thing about this particular virus seems to b...
by RET
Sat Feb 22, 2020 12:00 pm
Forum: Live Steam
Topic: Working Steam Power Reverser Value? Need Opinions.
Replies: 4
Views: 788

Re: Working Steam Power Reverser Value? Need Opinions.

Hi Tim, From the pictures I would guess that it is "home built" by someone who knows what they are doing. Making the control valve work properly is the key to a successful unit. I don't believe it is a model of any full size power reverser because as far as I know, they all had cross heads to take t...
by RET
Sun Feb 16, 2020 3:37 pm
Forum: Live Steam
Topic: Union Pacific Big Boy in 3/4 Inch Scale
Replies: 122
Views: 54415

Re: Union Pacific Big Boy in 3/4 Inch Scale

Hi, Here are three more pictures of the completed top feed. The ball checks are 9/32" stainless steel balls that seat on viton "O" rings. The copper colour comes from the silver soldering. The body and cover plates are actually made from bronze. Top Feed with both check valve covers in place-a.jpg T...
by RET
Sat Feb 15, 2020 4:31 pm
Forum: Live Steam
Topic: Union Pacific Big Boy in 3/4 Inch Scale
Replies: 122
Views: 54415

Re: Union Pacific Big Boy in 3/4 Inch Scale

Hi, Here is the completed top feed assembly. In the first simple design, I was planning to have check valves further back in the stainless feed piping, but later, after I made the first version, I decided it would be better for practical reasons if the check valves were incorporated in the top feed ...
by RET
Mon Feb 03, 2020 5:35 pm
Forum: Live Steam
Topic: steam/exhaust port sizing
Replies: 4
Views: 1285

Re: steam/exhaust port sizing

Hi Rudd, What gwrdriver says is true. From the dimensions you are quoting it sounds as if this could be for a 3 1/2" gauge locomotive, or perhaps 4 3/4". Historically, when the elongated ports didn't give enough steam flow to the cylinders, the next step was to go to piston valves which essentially ...
by RET
Sat Feb 01, 2020 4:18 pm
Forum: Live Steam
Topic: Union Pacific Big Boy in 3/4 Inch Scale
Replies: 122
Views: 54415

Re: Union Pacific Big Boy in 3/4 Inch Scale

Hi Everyone, I've finished the clamps for the vise and am using it, but I'm still working on the top feed. In the meantime, I thought you might like to see a few pictures of Gerhardt, the original builder and his locomotive. Gerhardt-1aa.jpg Gerhardt-1ba.jpg Gerhardt-1ca.jpg Gerhardt started working...
by RET
Sat Jan 11, 2020 9:00 am
Forum: Live Steam
Topic: Union Pacific Big Boy in 3/4 Inch Scale
Replies: 122
Views: 54415

Re: Union Pacific Big Boy in 3/4 Inch Scale

Hi Rich, I still have to look and see what I have in the CAD files for Big Boy. What I do is to put multiple parts on one drawing and draw what I need rather than make individual drawings for parts. I'm drawing for myself, not for publication so what's the point of making formal drawings? To give yo...
by RET
Wed Jan 08, 2020 9:29 pm
Forum: Live Steam
Topic: Union Pacific Big Boy in 3/4 Inch Scale
Replies: 122
Views: 54415

Re: Union Pacific Big Boy in 3/4 Inch Scale

Hi Rich, Yes, there will be more posts. As I said way back there somewhere, I only post to this thread once in a while. At the moment, I'm working on the boiler top feed assembly, In particular I'm making hold down clamps for a vise to go on the CNC mill to hold the two top covers for the top feed. ...
by RET
Wed Jan 08, 2020 8:21 pm
Forum: Build Log
Topic: Front End Rebuild
Replies: 18
Views: 3761

Re: Front End Rebuild

Hi Glenn, Sorry to rain on your parade, but if I were doing it, I would take the smoke box off and join the two cylinder exhausts together below it, thus winding up with something like the set up in the Boston & Albany with a single blast pipe that is aligned with the stack. The two cylinder exhaust...
by RET
Sat Jan 04, 2020 2:50 pm
Forum: Live Steam
Topic: Never seize in lieu of pipe dope
Replies: 32
Views: 4634

Re: Never seize in lieu of pipe dope

Hi Glenn, For pipe threads, I use teflon tape. It doesn't take a lot and it works. I custom make a lot of my fittings. That way I can fit them into smaller spaces and they look better. Custom made superheater headers, internal smokebox piping, all of these will benefit from a custom design. I don't ...
by RET
Fri Jan 03, 2020 2:29 pm
Forum: Live Steam
Topic: Run out of steam pressure after 100 feet
Replies: 40
Views: 9490

Re: Run out of steam pressure after 100 feet

Hi Nick, The first thing you need to know is that to be able to seal flat surfaces like a steam chest without using a gasket of some kind (paper, plastic, silicone seal, etc.) the surface not only has to appear flat and smooth, it actually has to BE flat and true the way water would be if you took a...
by RET
Wed Jan 01, 2020 9:07 am
Forum: Live Steam
Topic: Run out of steam pressure after 100 feet
Replies: 40
Views: 9490

Re: Run out of steam pressure after 100 feet

Hi Nick, A lapping plate may or may not be truly flat depending on how it has been used or even how the surface was when the plate was new. It works by being soft enough that the grit in the compound embeds in the surface of the plate. For sealing without gaskets, it is the flatness that you need. A...