The Bristol Railway Archive

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PostPosted: Mon May 06, 2019 8:49 pm 
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As some of you will already know, Union Pacific have been busy the last four years or so restoring "Big Boy" no. 4014 to working order. A cavalcade left their Steam shop at Cheyenne on Saturday to run to Ogden, Utah, where 4014 and 844 will be participating in the "Golden Spike celebrations marking 150 years since the completion of the first USA transcontinental railway.

They are now on their way from Cheyenne to Ogden and here is a clip of them at Point of Rocks yesterday

The engines are scheduled to be given a Rest Day tomorrow at Evanston, and do the remaining three or so hours to Ogden on Wednesday morning,

I should at least be in the right country to see them by then - leaving Heathrow for Chicago tomorrow afternoon and on to Salt Lake City (think of it as "Ogden Road" :) ) on Wednesday. It's one of the advantages of being retired ;)

https://www.youtube.com/watch?v=ogXRHk8Hq-Y


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PostPosted: Fri May 10, 2019 2:40 am 
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Well I got here :)

Ogden this morning (Thursday 9th May):

Ogden UTA station at 0830 with many men of a "certain age" arriving, and their womenfolk in many cases
[url]Image|https://thumbsnap.com/u8hF9IDA[/url]

844 waiting for the star of the show:
Image|https://thumbsnap.com/9W6sE7E3[/url]

4014 arriving after being stabled half a mile away out of sight of the crowds
[url]Image|https://thumbsnap.com/TQaIfYEN[/url]

4014 and 844 meet as the gathered throng watches:
[url]Image|https://thumbsnap.com/gc7VWlz5[/url][url]


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PostPosted: Sat May 11, 2019 1:39 pm 
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....but how will they get it down the Portishead Branch ??? :-):-)


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PostPosted: Sat May 18, 2019 12:14 pm 
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railwest wrote:
....but how will they get it down the Portishead Branch ??? :-) :-)


With some difficulty... ;)

One of these, circa 600 tons:
[url]Image[/url]

One of these, circa 140 tons, and Network Rail won't currently allow these loose on their network :)
[url]Image[/url]


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PostPosted: Sun May 19, 2019 8:13 pm 
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Quote:
One of these, circa 600 tons


It's got a lot more wheels though and it's actually only 8-coupled, rather than 10.

I wonder what its axle weight is?

Off the top of my head, 23.5 tons for a 9F and if it's 600 tons then ca. 50 tons for Big Boy, which surprises me given the state of a lot of American track ...


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PostPosted: Sun May 19, 2019 8:54 pm 
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jules wrote:
Quote:
One of these, circa 600 tons


It's got a lot more wheels though and it's actually only 8-coupled, rather than 10.

I wonder what its axle weight is?

Off the top of my head, 23.5 tons for a 9F and if it's 600 tons then ca. 50 tons for Big Boy, which surprises me given the state of a lot of American track ...


I have to own up and say that I was being bone idle and quoted that figure from another forum without checking it. Wiki has the following to say:

Engine 340 tons
Tender 152 tons
Coal capacity as built 25 tons
Water capacity 21,000 Imperial gallons so about 93 tons

So a fully-coaled and watered one would get to about 610 tons.

The axle load is quoted at 67,800lb so about 30.25 tons, and I have no idea how they reached that figure :mrgreen:

https://en.wikipedia.org/wiki/Union_Pacific_Big_Boy

They were of course specifically designed to drag freights of unimaginable weights (by UK standards) over the Wasach mountains between Cheyenne Wyoming and Ogden Utah, so the amount of track that would have to be kept to a high enough standard, to prevent them from falling over, would have therefore been limited to where it was intended that they should go.

And when one stops to think about it, for example, the coloured route classifications on the original GWR effectively did exactly the same thing.


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PostPosted: Tue May 21, 2019 11:37 am 
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Quote:
The axle load is quoted at 67,800lb so about 30.25 tons


That makes more sense, especially including all those axles under the tender :D


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