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This topic comprises 3 pages: 1 2 3
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Topic: How fast did steam engines go?
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Will Kutler
Phenomenal Film Handler

Posts: 1506
From: Tucson, AZ, USA
Registered: Feb 2001
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posted 02-23-2004 02:35 PM
Remember that when it comes to "Big Boys", they were built to rapidly transport high tonnage on mostly straight track w/lots of heavy grades in the Northern US. Their actual range of operation was quite limited.
Throughout their lives, Challengers were repeatidly converted between coal and oil firing. The problem with Big Boys is that thier firebox is just too large to allow for efficient oil firing.
As for coal, many of the coaling towers have been demolished. The SP coaling tower in Tucson (one of the Tucson landmarks), was torn down soon after UP took over SP. There were a lot of protests about the destruction...including a homeless person who had made it his home! The razing of the Tucson Coaling Tower was top news around here!
Anyhow, the Big Boys were coal fired, and fueling them up would be a real pain!
Furthermore, even if a Big Boy was to be restored, the areas in which it could operate would be very limited. I am not sure if a turn-table is even around capable of turning it?
Another thing to consider is that the Big Boy (engine and tender weight) was over 1 million pounds. The sheer weight of this monster would make havoc on system rail!
It is interesting to note that when UP 3985 (Challenger) and 8444 (Northern) are in opeperation, which is generally for excursion service, if there is a gap in the excursion, UP will in fact use them for actual revenue freight. Mark I Video has released footage of the Challenger in current freight ops! One of the reasons for this is that the Challengers operate better with a load (they are less apt to slippage, and possible stalling due to slippage, with a load).
I also understand that the various Big Boys around the country (mostly in Dallas and Pamona) have been raided for parts to restore 3985.
As for the end of the steam era...this is a topic that will forever be debated.
Between WWI and WWII, EMD was a little known company that introduced diesel engines. These were unreliable clunk things that no-one took seriously. The Big Three (ALCO, BALDWIN and LIMA) of steam-building fame certainly did not. Well, EMD (which was aquired by GM) pressed ahead w/ R&D, while the Big Three paid no attention to diesel development. After EMD became part of GM, GM through all its resources behind this little outfit. Meanwhile, the BIG THREE completely continued to ignore diesel development.
During wartime, American railroads are governed by the USRA. Railroad efficiency was of prime importance during war-time. The USRA had total controll over the railroads; they approved R & D into new motive power and rolling stock, controlled who could build what, and allocated raw materials for production. (Keep in mind that prime materials were used for military weapons, so lower grade materials were allocated for domestic use, including locomotive construction). USRA was concerned with railroad efficiency, and restricted the builders to their areas of expertise. So, EMD and its parent GM were allowed to continue on with Diesel development, while the BIG THREE were restricted from doing so. By the time the GP7 was formally introduced in the early 1950's, the die was cast. EMD/GM was just to far advanced in Diesel development for the BIG THREE to catch up. Although steam is much more powerful than diesel, diesel is just so much cheaper to operate! This spelled the doom for steam. Also, by the time diesel came into its own, advanced steam technology had really reached its peak.
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This topic comprises 3 pages: 1 2 3
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