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Shows / Re: Great Oregon Steam Up 2022
« Last post by larry_g on Today at 06:37:30 AM »


The highlight for me was the Willow Creek Railroad that is on the grounds there.  Its a 1/8 scale 7.5 gauge model railroad.  They had 4-5 trains running giving people rides.  Many of them were various little gas or diesel engines, but the one that caught my eye was a big 4-8-4 steam engine!





All in all, it was a fun event!
Kim

First time in more than 15 years I have not made the Steamup.  Having some health problems and my leg is not up to it.  That 4-8-4 is owned by my old boss.  He has owned it for many years.

lg
no neat sig line
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Your Own Design / Re: V-TWIN--MAYBE V4
« Last post by Art K on Today at 03:49:21 AM »
Looks good Brian, won't be long now!
Art
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Vehicles & Models / Re: Pennsylvania A3 Switcher (Kozo)
« Last post by Kim on Today at 01:56:17 AM »
Thanks Per and CNR!  :cheers:

Kim
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Vehicles & Models / Re: Chris's Ransome Tree Feller Build
« Last post by Kim on Today at 01:52:15 AM »
That's some mighty nice fabrication work there Chris!  :popcorn: :popcorn:

Kim
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Vehicles & Models / Re: Pennsylvania A3 Switcher (Kozo)
« Last post by cnr6400 on August 09, 2022, 11:14:14 PM »
Great looking finish on the parts Kim!  :ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn:
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Your Own Design / Re: Chris's Build of Battleship Ohio Engine
« Last post by cnr6400 on August 09, 2022, 11:11:25 PM »
2D dwgs to 3D CAD will do that. They should sell each CAD licence with a brain cooler!  :ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn:
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Your Own Design / Re: Chris's Build of Battleship Ohio Engine
« Last post by crueby on August 09, 2022, 10:30:05 PM »
The other thing to keep in mind, is I bet this engine has steam jacketing on the cylinders and the cylinder heads.   Lots to digest!!!

Dave
Yes!  Fortunately they give dimensions on the jackets, cylinder liners, passages, etc. The cross sections on those areas are very busy drawings! Some (well, most) of the views take a while to figure out where there are brackets sticking out, that sort of thing. I can do one piece of a part at a time, then need time for my brain to cool off and reset.   :insane:
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Your Own Design / Re: Chris's Build of Battleship Ohio Engine
« Last post by steamer on August 09, 2022, 09:48:28 PM »
The other thing to keep in mind, is I bet this engine has steam jacketing on the cylinders and the cylinder heads.   Lots to digest!!!

Dave
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Your Own Design / Re: Chris's Build of Battleship Ohio Engine
« Last post by crueby on August 09, 2022, 09:43:30 PM »
Some more info regarding the inboard/outboard locations of things on this engine. Been studying the different plan views on the frame and cylinders some more, to get a better grasp of what all the protrusions/flanges/fittings they show are. The section views get fun since a number of them do things like go across the cylinder from one side to the middle, then angle over at 45 degrees to a support column flange. Shows a lot in one section view, but it can be disorienting till its figured out.

One thing I have noticed is that the reversing engine, which is a cylinder/piston that hangs vertically and actuates the Stephenson links to move from forward to reverse (rather than having the big hand lever common on smaller engines), is hung off the rear (outboard) side of one of the frame pillars that goes from the cylinder to the base. I'm used to seeing it on the 'front' or inboard side of the engine. The control levers for the reversing engine is just below that engine.


At first, I thought that meant that to reverse both engines at once requires two people, one on either side of the two main engines. I had based my original assumption on the one label on the engine bed page where the view from the side with the thin posts is labelled 'Front Elevation'. Turns out that is just to differentiate it from the other view called 'Side Elevation'. I had assumed it referred to the inboard side. Nope!


However, after closer inspection of how the frame mounts were labelled on the cylinder drawings, I reallized that I had been thinking of the engine backwards!  The thin vertical posts are on the outboard side of each engine, and the thicker cast frames are on the inboard side of each engine. That puts the controls back between the two engines where one engineer can see and operate them all from the central catwalk or floor.

This doesn't change any of the CAD drawing I have done so far, other than I need to re-label parts I had been calling 'front' and 'rear'!


Also, the discussion from the other day stands - the condensers ARE on the outboard side of each engine.

Fun stuff, huh?  It will be very interesting to see if the National Archives does have drawings that include the top and plan views of the engineering spaces, sounds like that may not be viewable on their website till later in the year. If I was going to be closer to Maryland I'd visit in person to find out sooner, but the only other option is to hire a researcher in that area to dig into things sooner, and thats not worth the money.
I did get a start on the vertical pieces of the frames. Here is the quarter view that I had thought was from the inboard side. Turns out the long side here is the outboard side of the engine:

And here is a view from the other side, actually the inboard side. This is the side that will have the reversing engine, controls, etc.

Dizzy yet?   :insane:
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Vehicles & Models / Re: Pennsylvania A3 Switcher (Kozo)
« Last post by Admiral_dk on August 09, 2022, 09:05:12 PM »
Great result Kim   :ThumbsUp:  and thank you for showing the hanger detail - hope I will remember it next time I do some Powder Coating  :cheers:   :popcorn:

Per
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