Author Topic: Union Pacific Caboose  (Read 1332 times)

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robert3985

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Re: Union Pacific Caboose
« Reply #30 on: June 06, 2019, 08:48:21 AM »
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P for "Pool".  Between 1969 and 1977, 353 steel cupola cabooses were modified to operate system wide, in what was known as "pool service".  This included interchange on run-through trains with SP, C&NW, CB&Q (later BN), and CRI&P.  Since the only correct steel cabooses that are generally available to us N-scalers are Intermountain CA-3's and CA-4's, two CA-3's (25012 and 25049), along with seven CA-4's (25112, 25125, 25133, 25176, 26181, 26190 and 25193) were modified for pool service in 1975.  Of course, the most obvious indicator of "pool service" was the big red "P" on all sides of the cupola, but also safety slogans and bigger Scotchlite lettering and other graphic differences, including red Scotchlite around the top of the cupola were also very noticeable. 

Actual mods to the car itself were many, including a radio, oil stoves for heating, a complete water system, and roller bearing outside swing-hanger trucks.  An axle-driven alternator was also included to support the added electronics, and the new electric lighting, electric refrigerator, electric end-platform marker lights and the new electric red-over-green marker lights on the front and back of the cupola.

Also quite noticeable were the Lexan polycarbonate safety windows in the sides and ends with rounded-corner black rubber gasketed adapters on the body ends and front & rear cupola sides of many modified cabooses, but not all pool service converted steel cabooses got the adapters, and they retained their square windows.  Cupolas also had wind deflectors on the side windows, with some cabooses having a single centered deflector (CA-8's and CA-10's) and others having deflectors on both the front and rear sides of the side cupola windows (CA-7's and CA-9's).  I can't find any info on pool service CA-3's and CA-4's as far as deflectors are concerned, but several photos I have show plainly they had two deflectors per side.

Not noticeable except by the crew, were new, federally approved retention toilets.

Along with the new oil stoves, some pool service cabooses also got a taller, larger diameter smokejack, with horizontal bracing attaching it to the cupola.  Others retained the standard wire bracing.

Notable is that not all U.P. cabooses got converted to pool service, many retaining the smaller lettering until they were retired. Many cabooses, both pool service and non-pool service, retained their running boards and ladders too, even when it was federally required to remove them.

Most non-pool service steel cabooses eventually got the pool-service treatment, excluding the Scotchlite lettering and the Lexan safety windows, with no CA-6's ever being actually run in pool service.

Just for fun, what I do is find photos of specific cabooses, and I model them...with all their differences from each other.  My era is from 1947 through 1956, so differences in U.P. cabooses in my locale and era are different than what you'll get if you're modeling a later era.

For those who are modeling the U.P. during an era that ran cabooses, the book "Cabooses of the Union Pacific Railroad" by Don Strack and James L. Ehernberger is an absolutely invaluable resource.  There is updated information about all things U.P. in Utah, including cabooses on Don Strack's website here: www.utahrails.net

Cheerio!
Bob Gilmore
« Last Edit: June 06, 2019, 11:13:31 AM by robert3985 »

robert3985

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Re: Union Pacific Caboose
« Reply #31 on: June 06, 2019, 09:43:45 AM »
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So, now I'm confused. Are the old Golden West trucks and the more recent Keystone Details trucks supposed to be the same prototype? They look different to me.

 

-Mark

Actually Mark, @spookshow  the photo you have of the "Golden West Models" trucks are not what came with the kit.  You have a photo of what Intermountain/Centralia Car Shops made as an improvement over the trucks that came with the kit for their RTR version.

Photo (1) - Golden West Models version of U.P. roller bearing outside swing hanger trucks before assembly:


Photo (2) - Golden West Models version of U.P. roller bearing outside swing hanger trucks after assembly:


Photo (3) - Golden West Models version of U.P. roller bearing outside swing hangar trucks vs Intermountain/Centralia Car Shops improved friction bearing outside swing hangar trucks supplied with their RTR CA-3/CA-5 at introduction, except with FVM metal narrow tread 33" wheelsets:


I'm leaving these at maximum resolution if you want to use them on your website.

Cheerio!
Bob Gilmore
« Last Edit: June 06, 2019, 12:37:58 PM by robert3985 »

robert3985

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Re: Union Pacific Caboose
« Reply #32 on: June 06, 2019, 10:30:40 AM »
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Interesting catch, Mark. They're supposed to be. Axle spacing on the 1:1 is 5'6". I loaned John samples of OMI and Hallmark trucks to verify against when he did the art for the SW versions, so I would tend to trust his. (The swing hanger bolt on the SW truck is to be added by the user as it was not possible to execute consistently.)

I'll check when I get over to the shop later today.

@C855B Mike, I've got several brass versions of the U.P. outside swing-hanger trucks too, and each version is different from Hallmark and from OMI.  From my perspective, the Intermountain/Centralia Car Shops version was pretty good, but, I'm anxious to order the friction-bearing version from John, which looks different than the IMR version in several ways.  However, I'm sure they will be more robust than the IMR version.

Just for shirts and giggles, here are plan views of the early friction-bearing outside swing-hanger truck used on CA-3 and CA-4 cabooses to replace their wooden "Q" trucks after the CA-5 and CA-7 cabooses showed up with their new steel, smooth riding, low maintenance friction bearing outside swing-hanger trucks.  CA-8's, CA-9's, CA-10's and all pool service cabooses got a nearly identical version with some very minor differences...mostly being 1.5" wider and with a slightly different stabilizing torsion bar (swing-hanger bolt) and with roller bearings.  However, since there are no RTR plastic CA-8/9/10's available, I'm not posting those plans even though the later version was put on two pool service CA-3's and seven pool service CA-4's in 1975.











John and anybody else, can check the measurements on these plans against any model of this truck they may have, or be planning on producing, or be producing. I added the photo of a CA-4's friction bearing outside swing hanger truck on display in Mountain Home ID for clarity.

If John decides he would like to do the friction bearing inside swing-hanger trucks that were put on 50 CA-3's and CA-4's when the inside swing-hanger truck equipped CA-6 caboose was introduced in 1955...meaning the wooden "Q" trucks were completely gone on all U.P. steel cabooses by 1955... I've got the plans for those too and I'd be happy to send 'em to him!

Cheerio!
Bob Gilmore
« Last Edit: June 07, 2019, 04:33:19 AM by robert3985 »