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She's a beast— do not miss seeing her if you get the opportunity.




Refurbished "Big Boy" Locomotive Fires Up Crowds In US West


https://upload.wikimedia.org/wikipedia/commons/thumb/4/45/UP_Big_Boy_4014.jpg/300px-UP_Big_Boy_4014.jpg

By Mead Gruver


CHEYENNE, Wyo. (AP) — It’s longer than two city buses, weighs more than a Boeing 747 fully loaded with passengers and can pull 16 Statues of Liberty over a mountain.

The Big Boy No. 4014 steam locomotive rolled out of a Union Pacific restoration shop in Cheyenne over the weekend for a big debut after five years of restoration. It then headed toward Utah as part of a yearlong tour to commemorate the Transcontinental Railroad’s 150th anniversary.

Big Boys hauled freight between Wyoming and Utah in the 1940s and 1950s. Of the 25 built by the American Locomotive Company in Schenectady, New York, from 1941 to 1944, eight remain. Only No. 4014 will be operational.

Engineered for steep mountain grades, each Big Boy had not one but two huge engines beneath a 250-ton (227-tonne) boiler able to hold enough water to cover an area the size of a basketball court to the depth of a high-top shoe.

The locomotives are not only big, they’re so complex that steam train buffs long considered restoring one to a fully operational state all but impossible, said Jim Wrinn, editor of Trains magazine.

They were the “pinnacle of steam locomotive design” in the years before diesel engines took over...


more...


​

See also: https://en.wikipedia.org/wiki/Union_Pacific_4014


​
 
heathergives said:
I've been on this one a few times.


https://media-cdn.tripadvisor.com/media/photo-s/06/af/c3/8b/western-maryland-scenic.jpg
Click to expand...


WM #734 was retired several years ago.


The Western Maryland Scenic RR has been hard at work restoring a massive 2-6-6-2 "Mallet" steam engine:

http://img13.deviantart.net/0402/i/2016/025/9/a/chessie_1309___two_versions_by_zephyr4501-d9pbqd4.png

https://en.wikipedia.org/wiki/Chesapeake_and_Ohio_1309



The restoration has been far more expensive and complex than anticipated and is at least $1,000,000 over budget and a couple of years behind schedule.

Fortunately, the end is in sight.


#1309 is scheduled to be place in service this July. She will be a sight to behold.



​
 



As is true in so many human endeavors, many of the subtle (and critical) details are generally unknown to outsiders. So it is with "Track Geometry."


"The devil is in the details" may be a universal axiom.​




From wikipedia:


"...The tolerances of each parameter varies by the Track class of the track being measured. In the United States, geometry cars generally classify each defect as either "Class II" or "Class I" (though the exact name may vary by the railroad). A class II defect is known as a maintenance level defect, meaning that the track doesn't meet a particular railroad's own standards. Each railroad has their own standard for a maintenance level defect. A class I defect is a defect in violation of the Federal Railroad Administration's (FRA) track safety standards. Railroads must fix these defects within a certain period of time after their discovery or else they risk being fined.


Alignment – "Alignment is the projection of the track geometry of each rail or the track center line onto the horizontal plane," (FRA Definition). Also known as the "straightness" of the tracks.
Crosslevel – The variation in cant of the track over the length of a predetermined "chord" length (generally sixty-two feet). On straight or tangent track, ideally there should be no variation, while on curves, a cant is generally desired.
Curvature – The amount by which the rail deviates from being straight or tangent. The geometry car checks the actual curvature (in Degree of curvature) of a curve versus its design curvature.
Overhead lines (or catenary) – Measures the height and stagger of contact wire, the position of catenary masts or poles, and the positions of the wire bridges if applicable.
Rail gauge – The distance between the rails. Over time, rail may become too wide or too narrow. In North America and most of the world, standard gauge is 4 feet, 8.5 inches.
Rail profile – Looks for rail wear and deviations from standard profile.
Warp – The maximum change in crosslevel over a predetermined chord length (generally sixty-two feet)..."​




​



​
 
thør said:
Speaking of track geometry and other things.
Click to expand...

The all-purpose boogie man conjecture.

0.47° C.— and nobody knows why.


http://www.climate4you.com/

Diagram showing the University of Alabama (UAH) monthly global surface air temperature estimate (blue) and the monthly atmospheric CO2 content (red) according to the Mauna Loa Observatory, Hawaii. The Mauna Loa data series begins in March 1958, and 1958 has therefore been chosen as starting year for the diagram. Reconstructions of past atmospheric CO2 concentrations (before 1958) are not incorporated in this diagram, as such past CO2 values are derived by other means (ice cores, stomata, or older measurements using different methodology), and therefore are not directly comparable with modern atmospheric measurements. The dotted grey line indicates the approximate, overall linear temperature development, and the boxes in the lower part of the diagram indicate the relation between atmospheric CO2 and global surface air temperature, negative, positive or none. Last month shown: June 2019. Last diagram update: 10 July 2019. ​

___________


Things Keep Getting Worse For The Fake "Science" of Human-Caused Global Warming
by Francis Menton ("Manhattan Contrarian")


​
 
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