Edit post

Edit your reply below.

Post Body
Enter your post below.
[quote]QUOTE: Originally posted by malcand I've looked at all the photo's and I can't tell what valve gear system the T1's used, anyone know? [/quote] They used the Franklin poppet valves, actuated from the crossheads. One T1, the 5547, was altered and equipped with piston valves driven by PRR's standard Walschaerts valve gear. With regard to the latter day foreign improvements, such as Giesl ejectors, etc.: They might have improved efficiency somewhat, but probably weren't seen as being worth the cost. They were probably all covered by foreign patents, so would have to have been produced under license in the USA which would have added to the cost. To show you how this kind of thing affected Motive Power departments of various railroads, there were certain outfits that wouldn't use Baker Valve Gear because it had to be purchased from the Pilliod Company, which held the patent. There were railroads (NYC & N&W) that felt that Baker had certain operational and maintenance advantages and was worth the additional cost, whatever it might have been. But Egide Walschaerts' patent on his valve gear ran out many years ago, and it could be built without any additional cost. Old Timer
Tags (Optional)
Tags are keywords that get attached to your post. They are used to categorize your submission and make it easier to search for. To add tags to your post type a tag into the box below and click the "Add Tag" button.
Add Tag