Please identify mystery linkage on this 0-6-0

[Doug G.]

Automatic ones sure would have reduced the "whoops, there goes another cylinder head" occurrences.



Doug

[Chris333]

Didn't even know I had photos I took myself showing this.
Engineer side:

Brakeman side:

This was a small 0-4-0 that use to be a saddle tanker. Now it is just a shell on display:
https://www.google.com/maps/@41.1654752,-80.5682861,3a,58.7y,-10.27h,91.61t/data=!3m6!1e1!3m4!1stCZsy5jofT6IOXz10rBDbA!2e0!7i13312!8i6656

[DKS]

You can see them on these as well...

Porter 30" 0-4-0T, Raritan Copper Works No. 9: http://njmt.org/number_9.htm



Vulcan 48" 0-4-0T, Lehigh Valley Coal Company No. 117: http://njmt.org/number_117.htm

[mmagliaro]

Thank you for the tips and photos, everyone!

I have "cobbled" something together that I think looks pretty good.
The nasty part on my model is that the vertical lever from the long control rod down to the cylinders
cannot be bolted or attached to my frame in any way, the way the prototype is, because that would block
me from sliding the cylinders/saddle out the front.   The prototype world doesn't have to worry about
such things.

Photo will follow when I get them together.

[Doug G.]

Yeah, they just lift the boiler straight up.



Doug

[nkalanaga]

And removing bolts from the linkage is a lot easier in 1:1 as well...

[mmagliaro]

And removing bolts from the linkage is a lot easier in 1:1 as well...

That's really the nut of it.  When they take apart a real engine, they can just remove bolts and torch off or drill out rivets and pull things apart.  We can't do things like that with an N Scale loco. 

[peteski]

That's really the nut of it.  When they take apart a real engine, they can just remove bolts and torch off or drill out rivets and pull things apart.  We can't do things like that with an N Scale loco.

You can't?!   

[Iain]

Makes me wonder if all steam had cab controlled cylinder cocks , but maybe pneumatic or steam powered to a small activation cylinder buried under and between the steam chest with linkage to the cylinder cocks from there . We need under shots from wrecks .

Yes, all steam locomotives would have cab controlled drains.

As far as what happens when you put steam in the cylinder and it's full of water and the drain's shut?  Well, you pop the cylinder heads.  Don't ask how I know.

If you are in top dead center (which would not really be possible on a steam locomotive as both cylinders are out of phase with each other for this very reason), you wiggle the Johnson bar back and forth a bit to get things moving.  This is more a thing on Shays which would often have compound engines.

[DKS]

Yes, all steam locomotives would have cab controlled drains.

Not if they're automatic: http://www.freepatentsonline.com/2004097.html

Well, you pop the cylinder heads.  Don't ask how I know.

Or break the piston, bend the piston rod, split the cylinder casing, and/or any number of other catastrophic outcomes.

If you are in top dead center (which would not really be possible on a steam locomotive as both cylinders are out of phase with each other for this very reason)

True, cylinder pairs are always 90 degrees out of phase, but this does not prevent either cylinder from stopping at "TDC."

This is more a thing on Shays which would often have compound engines.

Um, compound Shays? Sounds as if you may not have an understanding of what "compound" engines are.

And having compound engines has no bearing on why they have cylinder cocks. It's purely to do with condensation in a cooling cylinder.
 

[Chris333]

Duh, this is another photo that I took (and it's a 0-6-0)


Former Youngstown Sheet & Tube locomotive on display at the Fairgrounds of Canfield, OH.
https://www.google.com/maps/@41.0110446,-80.760721,3a,60y,91.54h,84.54t/data=!3m6!1e1!3m4!1sKPmzWw4G48PxE_uYZYbLFg!2e0!7i13312!8i6656

[Iain]

Not if they're automatic: http://www.freepatentsonline.com/2004097.html

Or break the piston, bend the piston rod, split the cylinder casing, and/or any number of other catastrophic outcomes.

Well, yes.

True, cylinder pairs are always 90 degrees out of phase, but this does not prevent either cylinder from stopping at "TDC."

I should have said the effect is mitigated.

Um, compound Shays? Sounds as if you may not have an understanding of what "compound" engines are.

And having compound engines has no bearing on why they have cylinder cocks. It's purely to do with condensation in a cooling cylinder.

I thought Shays (at least the bigger ones) had compound engines?  Now that I look at photos, the cylinders all appear to be the same size across the board.  Ooops.  As far as understanding what 'compound' is, I work on a triple expansion marine engine in a steamship.  The thing about shays was referring to my (it seems, incorrect) thought that they were compound engines and thus could be stopped with the HP piston at TDC, thus preventing the engine from running.

[mmagliaro]

Great photo, Chris!  This is the best one yet that shows how it worked.
On the parts I made for my model, I didn't make the vertical lever curve outward to meet the
rod that connects the two drain cocks (let's call that the "valve rod" just to make this easier to talk about). 

Instead, I have it going straight down, with a straight
part coming out toward the cylinder and connected to the valve rod.
It hard to see how it was really shaped in those SP&S photos I showed. 

Duh, this is another photo that I took (and it's a 0-6-0)


Former Youngstown Sheet & Tube locomotive on display at the Fairgrounds of Canfield, OH.
https://www.google.com/maps/@41.0110446,-80.760721,3a,60y,91.54h,84.54t/data=!3m6!1e1!3m4!1sKPmzWw4G48PxE_uYZYbLFg!2e0!7i13312!8i6656

[DKS]

Found this online, not sure how useful it might be.

[mmagliaro]

David, YES. I think that must be how the SP&S link is. But I cannot understand how that works. There us a pivot in the connection to the center of the valve rod. So when the vertical link pivots, I don't see how that gets the valve rod to move. Where did you find that photo?