Search found 225 matches

by ChipsAhoy
Mon Jun 21, 2021 3:46 am
Forum: Live Steam
Topic: Invicta
Replies: 1
Views: 174

Invicta

I am curious about the 7 1/2" guage Invicta. Anyone have first hand knowledge on how they perform? The little guys seem to be pretty light weight, would they benefit from adding traction weights, or is there enough power to justify it? Can they pull three or four adults? The one I am looking at is c...
by ChipsAhoy
Sat Jun 19, 2021 3:18 pm
Forum: Riding Scale Railroading
Topic: Remote Control thoughts
Replies: 36
Views: 638

Re: Remote Control thoughts

I have no idea how it is done, but.... I saw on the news the other day a fellow demonstrating a drone substitute for fireworks. Somehow he had what seemed to be a hundred of those little guys doing intricate aerobatics in unison. So, some place, some body has multiple receivers working in unison.......
by ChipsAhoy
Mon May 24, 2021 10:55 pm
Forum: Riding Scale Railroading
Topic: Cement ties
Replies: 57
Views: 11414

Re: Cement ties

Dick, I think you are spot on. I suspect that the mollies expand to fill voids, then being "softer" than the concrete, must then flow. Looking at the pics, our ties are at least twice as wide, (thick), so more able to resist cracking/splitting, and there is not much opportunity for solids to infiltr...
by ChipsAhoy
Thu May 13, 2021 2:10 pm
Forum: Live Steam
Topic: Live Steam Accessories 3-D Models
Replies: 7
Views: 1968

Re: Live Steam Accessories 3-D Models

OnShape is a handy drawing program that is free (unless you purchase the high dollar upgrade). Being free, the drawings that you and others create are the available to the public. You may find a source of legal free drawings that you can use, one site I found is Thingiverse.com. Drawings are most us...
by ChipsAhoy
Thu Apr 15, 2021 2:36 pm
Forum: Live Steam
Topic: To pump or not to pump that is the question
Replies: 34
Views: 7735

Re: To pump or not to pump that is the question

Got all that except... where is the wasted energy in the axle pump? Only thing I can see is maybe the drag of the o-ring in the cylinder and the friction off the excentric. If that's it, then I don't see that as an issue. Where is the pump itself ineffecient? I do know I would really have my feeling...
by ChipsAhoy
Thu Apr 15, 2021 1:18 pm
Forum: Live Steam
Topic: To pump or not to pump that is the question
Replies: 34
Views: 7735

Re: To pump or not to pump that is the question

Just curious, why would an injector be more efficient than an axle pump? Where is the wasted energy in the axle pump?
Scotty
by ChipsAhoy
Wed Apr 14, 2021 11:40 am
Forum: Riding Scale Railroading
Topic: Cement ties
Replies: 57
Views: 11414

Re: Cement ties

We mix our own concrete on site. While rebar does add strength, it's best quality is holding cracked concrete together. Fiber reinforced concrete is easy to do, but I'm not sure the powers that be are ready for that discussion.... if you know what I mean. Air entrained and added lime may make them m...
by ChipsAhoy
Thu Apr 01, 2021 7:56 am
Forum: Museums, Factories, Etc.
Topic: Maricopa Live Steamers contact
Replies: 3
Views: 3202

Re: Maricopa Live Steamers contact

We've all been there. Doesn't matter, mother, wife or daughter, the wise response is " Yes dear".
Scotty
by ChipsAhoy
Wed Mar 31, 2021 9:07 am
Forum: Museums, Factories, Etc.
Topic: Maricopa Live Steamers contact
Replies: 3
Views: 3202

Re: Maricopa Live Steamers contact

Glenn: there is generally some folks at the track every day at some time or the other. Saturday usually has the best turn out. We are coming up on the season where most begin early in the day and start winding down as the heat winds up. You will probably want to meet some of the crew at the museum t...
by ChipsAhoy
Mon Mar 01, 2021 5:51 pm
Forum: Live Steam
Topic: engine
Replies: 5
Views: 2077

Re: engine

I read: 16" dia boiler with 1/2" wall thickness. Tube sheets are 1/2" thick. Now it gets a little more muddled. The tubes are either 2"dia 25" long sch 40, Or there are 25 ea. 2" dia schd 40. My guess is this post was intended to be a submitted reply in another thread. I wish all members were requir...
by ChipsAhoy
Thu Feb 25, 2021 7:23 am
Forum: Casting & Foundry Work
Topic: Release agent question
Replies: 42
Views: 17393

Re: Release agent question

We use glass to cover our melts to seal the surface and help prevent zinc fire. For that it works but what a mess. It does nothing as far as I can tell towards degassing. A problem we are having, and perhaps we use too much glass, it that it seems to condense outside of the crucible. After the pour ...
by ChipsAhoy
Wed Feb 24, 2021 4:05 pm
Forum: Casting & Foundry Work
Topic: Release agent question
Replies: 42
Views: 17393

Re: Release agent question

Jscarmozza
We pick up some porosity in the brass now and again. What are you using to degas the bronze?
And, when you degas, are you dealing with a glass zinc seal cover?
Scotty