Interesting Valve Gear - Pennsylvania

JohnHillier · **Posted:** Sun Oct 23, 2011 7:59 pm

This was on my Facebook feed this evening from a friend at Tennessee Valley. I've never seen this before, but is apparently a Pennsy engine. Any further details?

http://www.billspennsyphotos.com/apps/photos/photo?photoid=78659556

Jdelhaye · **Posted:** Sun Oct 23, 2011 8:07 pm

Looks like rotary oscillating cam poppet valves. Time to pull out my copy of "Pennsy Power"
Jeff

JohnHillier · **Posted:** Sun Oct 23, 2011 8:09 pm

Is this a retrofit to replace a slide valve?

Jdelhaye · **Posted:** Sun Oct 23, 2011 8:35 pm

Not a retrofit, and not poppets.

PRR E6sa #1092 built in 1912, had Young rotary valves actuated by Walschaert valve gear. Later rebuilt as a standard piston valve E6s.

Jeff