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Boston & Albany K6b Pacific build
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   Boston & Albany K6b Pacific build
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   Author  Topic: Boston & Albany K6b Pacific build  (Read 594 times)
BobbyT
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Boston & Albany K6b Pacific build
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« on: Oct 30th, 2014, 8:21pm »
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I have been collecting parts and casting for a Pacific for sometime. One issue I had was trying to decide which prototype to model. I am not a rivet counter but at the same time I want this locomotive to look like something that really existed. This created a problem. Because of the parts I had the engine had to have; spoked drivers, alligator crosshead guides, baker valve gear, and a delta trailing truck. Sounds simple enough until you try to find such an animal.  
I could find baker valve gear with hodges or coles  trailing trucks or walshaurt (sp) valve gear with delta trailing trucks. I finally found three I liked:
 
1) Maine Central #270 but this was a light pacific and I really wanted something heftier.
2) Erie K5 which is a really nice engine, but Bob Dean just built a really pretty one so I don't want the obvious comparisons.
 
so then I found #3 the Boston & Albany K6b pacific.


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« Last Edit: Oct 30th, 2014, 8:22pm by BobbyT » Logged
BobbyT
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Re: Boston & Albany K6b Pacific build
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« Reply #1 on: Oct 30th, 2014, 8:28pm »
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To me it looks like a first generation Hudson but with a 2 wheel trailing truck. The prototype throttle is located in the dome in front of the stack. An interesting feature is the throttle actuator rod goes through the sand dome. I am looking forward to some steaming bay discussions with the "steam experts" on that one.
 
I started months ago, but finally got a butt in gear to start this thread..... Sorry Henry.
 
From the beginning I have been assisted greatly by 2 of the best engine builders I know. Bob Dean and the late Peter Bialecki.  
 
Here is couple photo's of what have collected. A pair of Bob dean water jet cut frames and a set of LE rear cradle and Delta trailing truck.


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« Last Edit: Oct 30th, 2014, 8:29pm by BobbyT » Logged
BobbyT
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Re: Boston & Albany K6b Pacific build
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« Reply #2 on: Oct 30th, 2014, 8:32pm »
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A set of Roger Goldman cylinders.

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BobbyT
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Re: Boston & Albany K6b Pacific build
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« Reply #3 on: Oct 30th, 2014, 8:34pm »
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A set of Roger Goldman Baker valve gear.  
 
The cylinders and valve gear was built up by someone else so the plan is to completely disassemble and reassemble.... correctly.  


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« Last Edit: Oct 30th, 2014, 8:35pm by BobbyT » Logged
BobbyT
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Re: Boston & Albany K6b Pacific build
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« Reply #4 on: Oct 30th, 2014, 8:37pm »
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Found these on a popular auction site for a very good price.

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BobbyT
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Re: Boston & Albany K6b Pacific build
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« Reply #5 on: Oct 30th, 2014, 8:38pm »
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One of the first thing we had to do was square up the cradle and mount it to the frame.

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« Last Edit: Oct 30th, 2014, 8:39pm by BobbyT » Logged
BobbyT
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Re: Boston & Albany K6b Pacific build
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« Reply #6 on: Oct 30th, 2014, 8:43pm »
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I picked up the drawing set from the NYCSHS for the K6a & b pacifics. Well worth the investment. The drawing showed the rear cradle should be sort of "stepped down". As was pondering how I could modify it, Bob cuts up the cradle and rewelds it back up in 5 minutes.

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« Last Edit: Oct 30th, 2014, 8:43pm by BobbyT » Logged
BobbyT
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Re: Boston & Albany K6b Pacific build
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« Reply #7 on: Oct 30th, 2014, 8:46pm »
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Next we turned our attention to squaring up the journal openings. Oh yeah the journal boxes were already finished and a gift from a dear friend.

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BobbyT
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Re: Boston & Albany K6b Pacific build
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« Reply #8 on: Oct 30th, 2014, 8:47pm »
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Here is a shot of the cylinder notch.

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BobbyT
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Re: Boston & Albany K6b Pacific build
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« Reply #9 on: Oct 30th, 2014, 8:50pm »
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The problem with starting with pre-made parts is that they sometimes don't match the prototype. Case in point, the frame rails were too short in the front. I addressed this by making a new nose piece from solid steel plate.

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BobbyT
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Re: Boston & Albany K6b Pacific build
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« Reply #10 on: Oct 30th, 2014, 8:51pm »
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After rounding the top a little we welded a flat bar to the front.

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BobbyT
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Re: Boston & Albany K6b Pacific build
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« Reply #11 on: Oct 30th, 2014, 8:54pm »
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Here it is installed. The rails them selves will be extended later.

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BobbyT
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Re: Boston & Albany K6b Pacific build
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« Reply #12 on: Oct 30th, 2014, 8:59pm »
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I had the parts for a LE front truck but the axles were too close for this prototype. So I scrapped the LE side frames and Bob designed a new set from the original B&A prints and had the water jetted. I did use the rest of the LE heart rockers, swing arms, bolster and center pieces.
Here is the modified truck next to the LE side frame.


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« Last Edit: Oct 30th, 2014, 9:00pm by BobbyT » Logged
BobbyT
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Re: Boston & Albany K6b Pacific build
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« Reply #13 on: Oct 30th, 2014, 9:05pm »
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After Bob and I got the front truck together and mounted it to the frame we noticed a clearance issue. So Bob took the frames back to the water jet and removed some material to clear the wheel swing. he decided to remove some more material in front of the front driver to create an area to mount the suspension equalization adjuster. We also had to relocate the brake pivot stand to the rear about an inch or so. I haven't got a photo of the finished frame yet but here is what was planned.

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BobbyT
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Re: Boston & Albany K6b Pacific build
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« Reply #14 on: Oct 30th, 2014, 9:07pm »
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While all of this work was progressing Peter was turning the drivers.

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BobbyT
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Re: Boston & Albany K6b Pacific build
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« Reply #15 on: Oct 30th, 2014, 9:10pm »
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These are turned and waiting for the crank pin holes to be bored.
This is the last project Peter was working on. He interrupted work on his Niagara to do these for me. I cannot put it into words right now.


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BobbyT
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Re: Boston & Albany K6b Pacific build
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« Reply #16 on: Oct 30th, 2014, 9:17pm »
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After I got them back from Peter, I spent a week of evenings with a die grinder cleaning up the casting flash. Now they are just waiting on me.
 
That brings the project up do date, I promise I will update this thread as progress is made.
 
Bobby


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Henry
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Re: Boston & Albany K6b Pacific build
 
« Reply #17 on: Oct 31st, 2014, 1:40am »
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That's a sharp engine and nice job on the model so far!
 
Henry


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Dan Watson
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Re: Boston & Albany K6b Pacific build
 
« Reply #18 on: Nov 1st, 2014, 6:06pm »
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Bobby,
If you need a sand dome for this loco, I have one that might work (aluminum casting).  Right now it's buried in my basement somewhere.
 


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Pennsy4483
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Re: Boston & Albany K6b Pacific build
 
« Reply #19 on: Nov 3rd, 2014, 8:11am »
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Bobby,
 
Great update with lots of pics..... .  Keep up the great work (as well as posts and pics).
 
Don


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