Stephenson Vale Gear

[Jimmy Harrington]

After much debate on constructing a live steam locomotive, I have opted to attempt constructing a specific engine, of which I have an interest, may be able to complete (time frame TBA), which is of a relatively "simple" design. What is available in the 1" market is slim, and the suppliers of kits have a questionable track record (unfortunate for those in or starting in the hobby).

I am attempting to create construction drawings for a 1” scale 4-4-0 (specifically the NYC&HRR 999 in it’s original incarnation). I have found many diagrams and articles discussing Stephenson valve gear; however, I have not seen any diagrams illustrating specific geometry of the system. I would appreciate any help.

In addition, any specifics, drawings, links, photos, data would be appreciated regarding the locomotive.

Thanks,
Jimmy

[Bill Holland]

Look at Kozo's book on building the shay, it uses that valve gear if I recall correctly.

[andy pullen]

I've got drawings of both the Reading Camelback that belongs to me and drawings of an Allen Models Chloe. I could run a copy of each and send them to you. Send your snail mail address to my email listed in my profile here. (andypullen)

Get yourself a copy of "Locomotive Valves and Valve Gears" from www.lindsaybks.com , too. I think that's the title at least. It's on my shelf in the basement.

Andy Pullen