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Vehicles & Models / Re: Pennsylvania A3 Switcher (Kozo)
« Last post by cnr6400 on Today at 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 Today at 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 Today at 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 Today at 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 Today at 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 Today at 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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Your Own Design / Re: V-TWIN--MAYBE V4
« Last post by Brian Rupnow on Today at 08:55:42 PM »
Today seen the soldering of the intake manifold and the changes made to the small axles that hold the hardened part to the end of the rocker arms. I'm reasonably happy with this, and tomorrow I will make the exhaust pipes. I built an aluminum jig with the same bolt pattern as the two cylinder heads, and did my soldering on the intake out in the main garage away from the engine.

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Vehicles & Models / Re: Chris's Ransome Tree Feller Build
« Last post by cnr6400 on Today at 08:19:53 PM »
 :ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn:
Good news re the leak being fixed!
Note re the plugging for the end plates - I can tell ya that chewing tobacco won't likely plug the holes....for long  :Lol:
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Vehicles & Models / Re: Chris's Ransome Tree Feller Build
« Last post by crueby on Today at 07:51:38 PM »
Here is where the cylinder is at present:

The trunnion on the opposite side from the valve support plate has been added, and the holes for the passages into the ends of the cylinder were drilled. It turned out that there was someplace in the center support plate soldering that was leaking between the passages - I think I did not get the plate squeezed all the way down in the hole during soldering. To resolve the leak between the two end passages,  I resorted to running in a little epoxy in the center plate passage holes, letting it set, then drilling through again from both the center plate and from the ends. To drill from the ends, down the length of the passage blocks, I had to open up a hole in each end flange that will need to be plugged. But, it did solve the leak! 


Next steps will be to make the end caps, and drill matching bolt holes in those and the cylinder ends...
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From Kits/Castings / Re: Stuart Major Beam Engine
« Last post by Chipmaster on Today at 06:10:44 PM »
Ah yes Graham, the Retlas, Robinson HA, Inverted Chuk and Allman were all started and completed while building the Major plodded along. I also have Robinson Chippy castings and another Chuk to start. My RLE and Gardner O Type were completed before I treated myself to the Major castings as a retirement present.

Did you exhibit at Birmingham Science Museum Stationary Engine rally about 30 years ago, we were in a yard at the back of the museum ? Iím sure someone was there with Alyn Foundry engines

Andy
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