Search found 204 matches

by Andrew Pugh
Mon Oct 30, 2023 10:49 am
Forum: Build Log
Topic: EMD F7 in SCALE
Replies: 266
Views: 262290

Re: EMD F7 in SCALE

Nice piece of work Steggy, and thank you for taking the time to document and present it.

When I get off my rear end and start cobbling something together, I’ll be happy if I can achieve 50% of what you’ve captured in this thread.

-Andrew
by Andrew Pugh
Sat Apr 01, 2023 11:47 am
Forum: Build Log
Topic: EMD F7 in SCALE
Replies: 266
Views: 262290

Re: EMD F7 in SCALE

Could you give us an example of something you did a half-ass job on? ;D

Impressive work! Very nicely done.
by Andrew Pugh
Wed Mar 22, 2023 11:13 am
Forum: Build Log
Topic: EMD F7 in SCALE
Replies: 266
Views: 262290

Re: EMD F7 in SCALE

Hi Steggy,

I did recently re-read the whole thread, but I can’t recall if you mentioned how you coated the frame - is that powder coat?

-Andrew

EDIT: If you drag the unit down slow enough with a heavy train/grade, will you encounter wheel slip?
by Andrew Pugh
Mon Mar 06, 2023 4:47 pm
Forum: Build Log
Topic: EMD F7 in SCALE
Replies: 266
Views: 262290

Re: EMD F7 in SCALE

BDD now Steggy, glad to see you’re still at it! I’ve given the thread another well-deserved complete read thru.

-Andrew
by Andrew Pugh
Sat Jan 14, 2023 6:29 pm
Forum: Live Steam
Topic: Wide Wheel Treads
Replies: 17
Views: 3609

Re: Wide Wheel Treads

Without back checking, I believe I picked up Ecuador as the location, and 20 years since abandonment. The ‘trestle’ looks like a washout to me. Being a jungle, I’m surprised it’s as passable as it is.
by Andrew Pugh
Tue Jul 26, 2022 4:29 pm
Forum: Build Log
Topic: Depressed center flat car
Replies: 56
Views: 41577

Re: Depressed center flat car

How about a 4cyl long block? Could call it a stationary engine.

-Andrew
by Andrew Pugh
Mon Jul 18, 2022 9:15 am
Forum: Grand Scale Railroading
Topic: Grand Scale Freight Yard Aspirations
Replies: 16
Views: 11562

Re: Grand Scale Freight Yard Aspirations

<snip> Those are lighters used to move freight around NY harbor. Areas without carfloat service had freight offloaded in NJ and delivered via these. I don't know why some had the funky cupolas, but they did. There were also carfloats that did not have the cars moved off via a floatbridge, but inste...
by Andrew Pugh
Sat Jul 16, 2022 11:51 am
Forum: Grand Scale Railroading
Topic: Visiting the WF&P in St. Louis
Replies: 29
Views: 18632

Re: Visiting the WF&P in St. Louis

Yeah that’s what it looks like to me. Usually the outer race of a ball bearing is supported by a bore all the way round its circumference. This install puts a point load on the outer race. But like I said, it may not change the bearing life enough to matter, and they look pretty easy to replace.

-AP
by Andrew Pugh
Fri Jul 15, 2022 11:46 am
Forum: Grand Scale Railroading
Topic: Visiting the WF&P in St. Louis
Replies: 29
Views: 18632

Re: Visiting the WF&P in St. Louis

That style of retaining the bearings can’t be good for bearing life, but it may not reduce it enough to matter. Neat to see some of the big stuff!

-AP
by Andrew Pugh
Wed Jul 13, 2022 8:58 am
Forum: Live Steam
Topic: First serious steam engine build.
Replies: 69
Views: 26156

Re: First serious steam engine build.

Actually, the heat conduction through the tubing is a small fraction of the heat resistance. The heat transfer rate from the air to the boiler metal surface is by far the dominating factor, which is why turbulent air and radiant heat have such a large effect. The next biggest resistance is heat tra...
by Andrew Pugh
Mon Jul 11, 2022 6:37 pm
Forum: Live Steam
Topic: First serious steam engine build.
Replies: 69
Views: 26156

Re: First serious steam engine build.

At some point increasing surface area will compensate for the lower thermal conductivity of the stainless; I wouldn’t hazard a guess as to how much more area would be required though. Would be an interesting CFD experiment…
by Andrew Pugh
Mon Jul 11, 2022 5:47 pm
Forum: Grand Scale Railroading
Topic: Grand Scale Freight Yard Aspirations
Replies: 16
Views: 11562

Re: Grand Scale Freight Yard Aspirations

Wow that’s an extensive rail yard.

Anyone know what the rectangular box vessels with the central square protrusion are?

-AP