NKP 765 Close Pace - Baker Valve Gear
168,218
Published 2015-12-25
This is Baker valve gear, designed by the same A. D. Baker responsible for the efficient Baker Uniflow steam traction engines, manufactured in Swanton, Ohio.
One of the advantages of the Baker gear is that there are no sliding elements, as found on Walschaerts and Stephenson gear, and the Woolf gear found on most steam traction engines. The downside was that many railroads didn't want to pay royalties on the Baker - Pilliod patents, despite the better efficiency and maintainability.
Cruising forward, the reverse lever is nearly in the company notch, for minimum steam consumption. A small wisp of steam is admitted to the cylinders, and allowed to expand for most of the piston stroke. Preparing to stop, at 2:10, the reverse lever is advanced to full forward gear, and power maintained to keep the train stretched out while stopping with the train brakes.
After stopping, control of the air brakes is shifted to the pullback diesel, the reverse lever is moved to full reverse gear, and a small amount of throttle applied, to provide cylinder lubrication, and to prevent vacuum drag in the cylinders.
At 5:47, the feedwater heater cold water supply turbopump below the front of the firebox is started, with its characteristic whistle and plume of steam.
Mary shot 2/3 of this video, and Dave shot 1/3.
Cuyahoga Valley Scenic Railroad
October 4, 2015
#533
Panasonic FZ1000
151004h 765 CVSR Pace
All Comments (21)
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One of the best, I was to young to realize how petty them old iron beasts were. Now I’m 83 they all gone, I remember them but I didn’t appreciate them, boy I watch pictures of them as much as I can. Thank you 😊
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New to appreciating steam locomotives. Really appreciate the long views of the wheels, rods, and pistons in action. Thank you.
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I just can't stop watching those side rods!
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Thanks I enjoyed the video you actually showed us the hardware rather than the scenic pictures that usually come with this former video I hope you make one on the regulator I'm really curious about that and I haven't seen one yet
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7.36 - 7.51 is the best sequence for seeing Baker Valve Gear at work in this video. Here in New Zealand we had 93 locos with Baker Valve Gear. Good video, nice and clear, and good quality.
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Sweet! There's just something about these old steam locos. Nice valve gear footage!
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I could watch this all night
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Why am i just now finding this? Beautiful locomotive in great condition.
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Extra-super film. Thanks - regards
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Steam locomotive view is always new and Whistle is Tremendous.
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AT THE START OF VIDEO THEY MUST HAVE ADDED SOME COAL! AS THE SMALL STUFF LEFT THE FIREBOX , THE SMOKE CLEARED NICELY! GOOD FIRING!!
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Great video. Very cool shots of the valve gear and wheels!!
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I'm building a freelance loco in 7.25 guage and after watching this video, i removed the valvegear and fitted baker gear. Pity i did not see this great video months earlier, great video thanks
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Be glad you got the pacing footage when you did. The local and park police and the CVSR have made it virtually impossible to photograph or pace the train when 765 is in town. All of Riverview Rd. that parallels the tracks is posted "no parking" during Steam in the Valley, and the local cops hang around at train time and run off anyone who tries to do what you did. They have made it virtually impossible to railfan in the park when steam in in town. The CVSR hates the fans, and considers them nuisances that never buy a ticket.
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Never noticed this before: maybe it's just the angle of the view, but that piston rod looks really small (compared to the massive connecting and side rods). I wonder how it can handle the tremendous force of transmitting each piston stroke to the rest of the drive train. Maybe Lima designed it that way to reduce the reciprocating mass?
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A D Baker Company made agricultural steam traction engines. They always had a distinctive sounding exhaust. My favorite traction engines because of that booming exhaust note
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What a beautiful machine, I noticed several things, the main drive wheels all have balance weight on each one different dependent on connecting rod arrangement, dont think I ever noticed that on an engine before. And what seems like a power assisted valve adjuster with a big piston and some sort of control valve to regulate it. Somthing like the way power steering work's on a car except here its steam or compressed air not oil as the power fluid, You have to hand it to the people who created these marvelous engines for the ingenious design and implementation. And thank you to all the people who are working so hard to maintain them. Plus what a great close look at the mechanics in operation,, Cheers to all of you
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What a beauty. I'd say I am piston crazy! Happy New to everyone. 😀👍
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Such a magnificent machine!
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I have an old Lionel just like this one on my bookcase. Has been there for years.
