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Re: NNG: Scenes at Steamtown

June 05, 2019 05:07PM avatar
Ah, that's the word, thanks Earl!

I recall hearing about this style of running gear once before on a video I saw on Youtube about Soo Line 1003. As explained by the engineer in the video, 1003 is also equipped with indirect Walschaerts valve gear. He stated that this was done since the 1003 was built without a power reverser and so having the radius rod up at the top of the reversing link in full forward position on the Johnson Bar allowed for the engineer to use gravity in his favor to hook the engine up while out on the road against the tremendous weight of the valve gear and pressure in the steam chest. Of course to your statement, I could easily see how if it fails you get a mouth full of Johnson Bar is a hurry.

One hypothetical question, since #26 is slide valve equipped and if she were to get stuck on center, with a Johnson Bar versus power reverser, would having indirect Walschaert's valve gear actually be helpful to the engineer trying to jerk back the valve into reverse in order to move the piston off center? I can recall a couple of times seeing Thomas at Strasburg getting stuck on center and witnessed how stressful it was to move the valve under the pressure of the steam sitting on it.

Mike Wilson
RailFilm Productions
[www.youtube.com]
Michael J. Wilson Photography
[www.facebook.com]



Edited 1 time(s). Last edit at 06/06/2019 08:04AM by Mike.
Subject Author Posted

NNG: Scenes at Steamtown Attachments

Mike June 03, 2019 09:19PM

Re: NNG: Scenes at Steamtown Attachments

Mike June 03, 2019 09:22PM

Re: NNG: Scenes at Steamtown Attachments

Mike June 03, 2019 09:28PM

Re: NNG: Scenes at Steamtown Attachments

Mike June 03, 2019 09:32PM

Re: NNG: Scenes at Steamtown

gato June 04, 2019 07:59AM

Re: NNG: Scenes at Steamtown

Greg Scholl June 04, 2019 09:09AM

Re: NNG: Scenes at Steamtown

Mike June 04, 2019 10:20AM

Re: NNG: Scenes at Steamtown

Earl June 05, 2019 01:24PM

Re: NNG: Scenes at Steamtown

Mike June 05, 2019 05:07PM

Re: Walschearts Gear with Slide vs Piston Valves . . .

Russo Loco June 05, 2019 09:00PM

Re: NNG: Scenes at Steamtown

wchamp2 June 04, 2019 06:40AM

Re: NNG: Scenes at Steamtown

Jim McKee June 05, 2019 02:31PM

Re: NNG: Scenes at Steamtown Attachments

MD Ramsey June 05, 2019 03:14PM

Re: NNG: Scenes at Steamtown

Mike June 05, 2019 05:16PM

Re: NNG: Scenes at Steamtown

Volvoguy87 June 11, 2019 06:27AM



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