It is currently Mon Sep 21, 2020 3:45 pm

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 20 posts ]  Go to page Previous  1, 2
Author Message
 Post subject: Re: Former McCloud River RR #19 fired at AoS roundhouse
PostPosted: Sat Sep 12, 2020 11:37 am 

Joined: Tue Sep 14, 2004 7:52 am
Posts: 1865
Location: Strasburg, PA
Robby Peartree wrote:
Has anyone considered the relative forces on the combination lever for each set up? The longer combination rod would require less force from the piston to move the valve.
Actually not. The lap dimension is the same on those engines, as probably is the lead. That means that the ratio of movement between the piston and the valve is the same, which means that the force needed is the same. When the bottom of the lever is made longer, the top of the lever is also made longer in proportion.

_________________
"It was not easy to convince Allnutt. All his shop training had given him a profound prejudice against inexact work, experimental work, hit-or-miss work."
C. S. Forester

Strasburg Rail Road Mechanical Department


Offline
 Profile  
 
 Post subject: Re: Former McCloud River RR #19 fired at AoS roundhouse
PostPosted: Sat Sep 12, 2020 7:16 pm 

Joined: Wed Jan 11, 2017 12:08 am
Posts: 56
"And I am going "off-topic" here, apologies, but I couldn't help but notice what looks like a (very recent?) application of Pullman Green to the sleeper White Castle in the left background in the first photo. Last photos I can find in a real quick search have it still in Ohio Central Maroon, but that was already 10 years ago, so..."


Yep, the Age of Steam Roundhouse Museum has been obtaining, restoring, repairing and repainting more than just its collection of 23 steam locomotives. Historic freight equipment, cabooses, passenger cars and diesel locomotives are being spruced-up, as well.

The former Pullman sleeper White Castle was sold and converted during 1958 into a P&LE wreck train diner/bunk car. It was purchased—along with the entire P&LE wreck train—by Jerry Jacobson for use on his Ohio Central Railroad System. Jerry had this car repainted into the OC’s standard maroon livery as had been applied to his 26 other passenger cars. During the winter of 2018-2019, AoSRM refreshed this car’s interior to its P&LE wreck train appearance, and its exterior was repainted into the Pullman Green livery that the White Castle wore in the 1940s.

Age of Steam Roundhouse Museum does not issue a media release each time its employees restore an old piece of rolling stock, but you can see restoration effort updates at their website: www.ageofsteamroundhousemuseum.org , as well as on Facebook, Instagram and Twitter.

Be safe.

John B. Corns


Offline
 Profile  
 
 Post subject: Re: Former McCloud River RR #19 fired at AoS roundhouse
PostPosted: Sun Sep 13, 2020 1:28 pm 

Joined: Wed Dec 23, 2009 2:57 pm
Posts: 38
Location: Catching the Eastbound
Good eye Ted.
Yes, White Castle was recently painted.
Check out the this link for details:

https://www.ageofsteamroundhouse.org/pu ... te-castle/

Tim S.


Offline
 Profile  
 
 Post subject: Re: Former McCloud River RR #19 fired at AoS roundhouse
PostPosted: Sun Sep 13, 2020 11:05 pm 

Joined: Wed Aug 25, 2004 11:16 am
Posts: 697
Kelly Anderson wrote:
Robby Peartree wrote:
Has anyone considered the relative forces on the combination lever for each set up? The longer combination rod would require less force from the piston to move the valve.
Actually not. The lap dimension is the same on those engines, as probably is the lead. That means that the ratio of movement between the piston and the valve is the same, which means that the force needed is the same. When the bottom of the lever is made longer, the top of the lever is also made longer in proportion.



First consider the motion near the center position of the link. At this point the valve motion primariy comes from the union link and cross head using the combination lever and radus rod connection as a pivot.
Now put in the valve gear into a full forward motion. You. Ow have imput from both sources of valve motion. Since the ecentric follows the main rod in a circular pattern, when the ecentric road is primarily moving vertically, the union link imput to the combination rod changes the direction of valve travel using the radius rod conection as a pivot. When the ecentric travels primarily in a horizonatal motion it moves the radus rod combination and the connection we seen used as a lever connection to a new line for the combination rod to be pivoted about for the next valve change.

The different arm length of the combination lever to the union would result in forces need at the cross head. The vlave creates a torque of a reistance force f and the distance from the valve stem and the connection of the radius rod and the combination lever. Torgue being force times distance. Because the torque about the connection of the combination lever and the union link would be force times the length from the union link to the pivot minus the resistance torque of the valve a longer combination lever would result in a smaller force need to be applied to over come the calves resistance force.

When the cross head and eccentric crank are traveling in the same diection then it becomes a balance of forces but then you usually are dealing with kenetic friction instead of static friction.

Robby Peartree


Offline
 Profile  
 
 Post subject: Re: Former McCloud River RR #19 fired at AoS roundhouse
PostPosted: Wed Sep 16, 2020 8:46 am 

Joined: Sat Jan 02, 2010 1:16 pm
Posts: 65
Location: Bellefontaine, Ohio
AOS could run this steamer at the Hocking Valley which is now running steam almost every weekend.


Offline
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 20 posts ]  Go to page Previous  1, 2

All times are UTC - 5 hours [ DST ]


 Who is online

Users browsing this forum: Google [Bot], whodom and 130 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to: