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.

"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

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.

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

AOS could run this steamer at the Hocking Valley which is now running steam almost every weekend.