1" Baldwin-Westinghouse Class D....Sacramento Northern

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battleboy
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Joined: Mon Nov 02, 2009 6:17 pm
Location: little falls, nj

Re: 1" Baldwin-Westinghouse Class D....Sacramento Northern

Post by battleboy »

Wheels machined by Andy...beautiful job as always. Axles machined up. Next up is the truck bolsters...1”x5” aluminum 6061.
Attachments
073C00F9-7467-46B4-82B7-DC5DD1BF1DD8.jpeg
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1" L.E. Pacific
1” F-7’s
3/4" F-3's
1.5" GP7 “Lackawanna”
1.5” LE Atlantic
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Harold_V
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Re: 1" Baldwin-Westinghouse Class D....Sacramento Northern

Post by Harold_V »

Something to ponder.
Rule of thumb for machining round items is that they should not project more than three times their diameter from the support mechanism, in this case, a collet. Anything greater will yield taper in the cut, due to cutting pressure. It appears that you have exceeded that rule substantially, so if you had issues with taper, you might consider that as the possibility.

Nice looking work!

H
Wise people talk because they have something to say. Fools talk because they have to say something.
battleboy
Posts: 37
Joined: Mon Nov 02, 2009 6:17 pm
Location: little falls, nj

Re: 1" Baldwin-Westinghouse Class D....Sacramento Northern

Post by battleboy »

I appreciate that Harold. I was lazy and used a 5C collet stop. There was actually a slight undercut where the wheel will be pressed on so I knurled that area to give me the interference fit rather than scrapping the 1144 axles. I wouldn’t have done that on a steamer. I appreciate the knowledge.
1" L.E. Pacific
1” F-7’s
3/4" F-3's
1.5" GP7 “Lackawanna”
1.5” LE Atlantic
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Harold_V
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Joined: Fri Dec 20, 2002 11:02 pm
Location: Onalaska, WA USA

Re: 1" Baldwin-Westinghouse Class D....Sacramento Northern

Post by Harold_V »

battleboy wrote: Sun Feb 25, 2018 6:17 pm I appreciate that Harold. I was lazy and used a 5C collet stop. There was actually a slight undercut where the wheel will be pressed on so I knurled that area to give me the interference fit rather than scrapping the 1144 axles.
A bit of a cringe.
While a knurl will provide interference, because there's no metal to fill the voids, the fit often fails as the wheel works, displacing the (knurled) metal.
I suspect Bill Shields would suggest the use of Loctite when assembling, to avoid failure.

I've faced the problem of needing a stop before, and have come up with a system that permits a stop set deeper in the spindle, so longer items can be reliably machined. Unfortunately, a draw bar makes that impossible. I realized I had gained that capability when I added a Hardinge-Sjogren collet chuck to my Graziano (equipped with a D1-4 spindle). I like the lever closer, but it's nice to be able to close a collet with a hand wheel on the collet chuck for that reason. An added benefit is length is not controlled by diameter, as it is when using a collet stop. I've worked with .001" tolerance with reliability with the stop system I use.

H
Wise people talk because they have something to say. Fools talk because they have to say something.
battleboy
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Joined: Mon Nov 02, 2009 6:17 pm
Location: little falls, nj

Re: 1" Baldwin-Westinghouse Class D....Sacramento Northern

Post by battleboy »

Making progress. Bolsters are 6061.
I always use layout dye then scribe my lines using a caliper. Drilled holes first then machined the angle. Next, 1/4" ball end mill then milled out remaining material. Sand blasted to give that "cast" look. Machined a pocket in the bottom of the bolster for wheels/flange clearance. Still plenty more to do!
Attachments
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IMG_E8890.JPG
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battleboy
Posts: 37
Joined: Mon Nov 02, 2009 6:17 pm
Location: little falls, nj

Re: 1" Baldwin-Westinghouse Class D....Sacramento Northern

Post by battleboy »

Truck temporally assembled to check fit/clearance.
Attachments
IMG_8892.JPG
IMG_8893.JPG
1" L.E. Pacific
1” F-7’s
3/4" F-3's
1.5" GP7 “Lackawanna”
1.5” LE Atlantic
battleboy
Posts: 37
Joined: Mon Nov 02, 2009 6:17 pm
Location: little falls, nj

Re: 1" Baldwin-Westinghouse Class D....Sacramento Northern

Post by battleboy »

Taking a brake from the trucks so I started the fab for the body sides. I've drawn up blueprints based on pictures I have blown up from a book. Quite the challenge to build something from pictures and a few known dimensions.
The body sides are 6.5" x 18" x .062" Aluminum 2024. I first sprayed w/ layout dye and milled out the windows using a 3/16" end mill for a nice finish and rounded corners.

Next, scribed lines for rivets. I made up a few rivet spacing jigs out of 1/8" x 1/2" steel. One is spaced .25" and the other is spaced .625". The jig is held in place by clecos so the 316 holes can be evenly spaced. That's 1,264 individually drilled holes for the four sides. The rivets I will be using are 1/16" solid, round head, 1100F aluminum from Hansen Rivet & Supply Co.

For the windows, they will have a 1/4" reveal using the end mill. I temporally riveted four together at a time for quicker more uniform machining. These will be held in place to the inner side walls w/ Loctite 330 adhesive.
Next up will be the body ends.....stay tuned!
Attachments
IMG_E8444.JPG
IMG_E8889.JPG
IMG_E8888.JPG
IMG_8869.JPG
1" L.E. Pacific
1” F-7’s
3/4" F-3's
1.5" GP7 “Lackawanna”
1.5” LE Atlantic
battleboy
Posts: 37
Joined: Mon Nov 02, 2009 6:17 pm
Location: little falls, nj

Re: 1" Baldwin-Westinghouse Class D....Sacramento Northern

Post by battleboy »

The body ends are 8" x 10" x .062" aluminum 2024. Just as the sides I held all four together to mill out the windows/door for uniformity.

Rivet lines scribed and 96 holes drilled for rivets....x4 ends = 384 holes. The ends were separated and drilled individually.

Attached the four ends together again w/ cleco's and scribed the curved roof line. Rough cut the roof line using a bandsaw then finishing up to the line w/ belt sander. The top of the ends will have additional rivet details added.

Next up will be the hoods....Stay Tuned!!
Attachments
IMG_8876.JPG
IMG_8878.JPG
IMG_8882.JPG
IMG_8895.JPG
IMG_8896.JPG
1" L.E. Pacific
1” F-7’s
3/4" F-3's
1.5" GP7 “Lackawanna”
1.5” LE Atlantic
Mr Ron
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Joined: Tue Dec 22, 2009 12:36 pm
Location: Vancleave, Mississippi

Re: 1" Baldwin-Westinghouse Class D....Sacramento Northern

Post by Mr Ron »

Beautiful work so far. I build in 3/4" scale and built a model of the 3 phase motor that pulled trains through the Cascades tunnel on the Great Northern. I only had a photo and a few dimensions to work with. Using autocad, I was able to recreate drawings. It is powered , but not intended for riding. I am still thinking about radio control. Now it is just a display model and certainly not up to your standards. I made the body from plywood and other non-metallic materials, but the frame and trucks were made from 6061. Your Sacramento Northern looks like a model I would like to build. Are there any drawings available?

A wood body may sound non prototypical, but some motors of the past were built using wood bodies. I built a model of a Swedish electric that had a wood body, as wood provided insulation against the arctic cold in that country. That model was in 1-1/2 scale, but I'm running out of room for large models. I also built a model of the first diesel electric box cab (AGEIR) used on a U.S. railroad with an Ingersol Rand diesel and GE motors, also in 1-1/2 scale and drawn up from photos and dimensions.

On your engines, I' assume you will be using batteries for power; the pantograph will be a dummy.
Mr.Ron from South Mississippi
battleboy
Posts: 37
Joined: Mon Nov 02, 2009 6:17 pm
Location: little falls, nj

Re: 1" Baldwin-Westinghouse Class D....Sacramento Northern

Post by battleboy »

Mr. Ron....Thank you for the compliment. I'm not using autocad, just hand drawing my own blueprints and of course making corrections as I go. These will be 24VDC and either a SyRen or 4QD control system and will also be R/C. My plan is to use one motor per truck mounted on top of the bolster driving the axles with #25 chain. The pantograph and trolley poll will be dummies but will have moveable functions. Please share photos of the model you built.
1" L.E. Pacific
1” F-7’s
3/4" F-3's
1.5" GP7 “Lackawanna”
1.5” LE Atlantic
battleboy
Posts: 37
Joined: Mon Nov 02, 2009 6:17 pm
Location: little falls, nj

Re: 1" Baldwin-Westinghouse Class D....Sacramento Northern

Post by battleboy »

Hood sides cut and sanded to shape using a paper template.

Hood tops bent using a slip roller and various diameter pipes to achieve the correct compound contour. Then cut to proper length.
Attachments
E4EFB730-3BB3-4181-BEE3-B859B4080DC5.jpeg
8D39B84F-C257-40CA-944E-CA7AB41A10AD.jpeg
AA00AF68-0F0B-4B30-B9A3-53F54138BAA6.jpeg
67B1636E-F084-4BE4-8E88-7EABFF67C8A3.jpeg
1" L.E. Pacific
1” F-7’s
3/4" F-3's
1.5" GP7 “Lackawanna”
1.5” LE Atlantic
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