Help Baker valve gear

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pollockmarine
Posts: 34
Joined: Sat Aug 06, 2011 11:51 pm
Location: New zealand, Wellington

Help Baker valve gear

Post by pollockmarine » Thu Jun 28, 2018 2:31 am

Hi team,

Trying to find what style Baker valve gear the C&O K3-a heavy Mikado run and also the NYC H10a

Thanks in advance
Brendan

Pat Fahey
Posts: 106
Joined: Sun Oct 23, 2011 10:45 am

Re: Help Baker valve gear

Post by Pat Fahey » Thu Jun 28, 2018 7:58 am

Hi
I just took a look at my books on C&O Power and NYC Steam power, looks like the engines you are looking for carried the same type of valve gear. Both had inside admission to the valves, is that what you are looking for? Pat Fahey WLS

pollockmarine
Posts: 34
Joined: Sat Aug 06, 2011 11:51 pm
Location: New zealand, Wellington

Re: Help Baker valve gear

Post by pollockmarine » Thu Jun 28, 2018 2:17 pm

Hi Pat,

I'm have trying to work out if it was style 4 or 5 I know it was long stroke Baker inside admission but as to drawings I am lacking

david griner
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Re: Help Baker valve gear

Post by david griner » Thu Jun 28, 2018 4:09 pm

You might try this.....................a very complete dissertation, including many dimensions on the various frames.


http://www.solidesign.bizland.com/pdf/B ... 201946.pdf

little giant
Posts: 93
Joined: Tue Jan 06, 2015 5:35 pm
Location: Rochester NY

Re: Help Baker valve gear

Post by little giant » Thu Jun 28, 2018 5:22 pm

NYC H10a used the triangular frame, looks like channel steel with edges facing outward.

JKreider
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Location: Redlands, CA

Re: Help Baker valve gear

Post by JKreider » Fri Jun 29, 2018 2:21 am

Baker valve gear was designed in three different sizes, at least for inside admission valves:
Standard; The common gear frames have reinforcing ribs visible on the outside of the hanger frames. The triangular gear frame was generally used on two-wheel pilot truck locomotives while the long frame was generally used on four-wheel pilot truck locomotives. Use of the gear frame type depended on where the support hangers were positioned in between the drivers in relation to the cylinder location to allow room to properly design the valve rod and other components.
It looks like Roger Goldman of Live Steam Locomotives makes this size gear for 1-1/2” scale although I have never measured it.
Long Travel & Long Lap; With the need for greater port openings and larger valve lap came these larger gear assemblies.
This is the gear that we find on modern locomotives such as NKP Berkshires, NYC Niagara’s, etc. Both the long and short versions of the gear frame are characterized by having smooth outside contours with the reinforcing ribs on the inside.

Jerry_H
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Location: Central FL

Re: Help Baker valve gear

Post by Jerry_H » Sun Jul 01, 2018 3:30 pm

I have that booklet. I thought that the gear was standard, that for a given gear type all the dimensions were the same regardless of which locomotive it might be used on. However after looking at the dimensional diagrams on page 46 detail 3 I have a question. On the "gear connecting rod" the distance between the center pivot and the lower connection for the eccentric rod is given as 16 - 18 inches. How on earth do you determine which one to use???

Jerry
www.chaski.com

Jerry_H
Posts: 199
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Location: Central FL

Re: Help Baker valve gear

Post by Jerry_H » Tue Jul 03, 2018 9:34 pm

Still looking for an answer.

Jerry
www.chaski.com

Steve Bratina
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Location: Cambridge Ontario

Re: Help Baker valve gear

Post by Steve Bratina » Wed Jul 04, 2018 8:52 am

Contact the New York Central Historical Society. Ask your question and probably receive an answer.

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Bill Shields
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Re: Help Baker valve gear

Post by Bill Shields » Wed Jul 04, 2018 10:02 am

the length is dependent on what is needed to get the end of the pivot centered on the axle height, so it is in effect a variable defined by the loco construction. Pilliod made several 'standard' lengths and the location of the valve frame was setup to use one of them.

you generally have to make some assumptions, stick in some numbers and see if you can build a loco around them by moving the valve frame up down / back forth. If not, move things around.

For a model, you can make the arm any length you want since you are not purchasing components from Pilliod.

Jerry_H
Posts: 199
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Location: Central FL

Re: Help Baker valve gear

Post by Jerry_H » Wed Jul 04, 2018 11:34 am

Thank you, Bill.

Jerry
www.chaski.com

AnthonyDuarte
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Re: Help Baker valve gear

Post by AnthonyDuarte » Wed Jul 04, 2018 12:02 pm

The drawings available from NYCSHS have more information on the H10's than you would ever need. Just sign a waiver saying you don't intend to profit off of the drawings, and the price is very reasonable.

http://www.nycshs.net/NYCS-Drawing-File ... p_189.html

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