UP Mk-Special 10K Gallon Tender (As Built)

UP Mk-Special 10K Gallon Tender (As Built)

Early in the United States' involvement in World War One, the railroad industry faced multiple crises. With the rail network operating as many separate, fragmented, and competitive railroads, critical materials were unable to reach their markets due to poor coordination. Although eastern markets had a surplus of empty cars, the empty cars were not making their way back for reloading in a timely manner. Competition between railroads saw lines trying to protect their market share bog down in a deluge of traffic instead of routing freight through alternate lines with sufficient capacity. With an abundance of traffic, railroads scrambled to keep trains moving with anything they could get their hands on - but this effort took its toll on the equipment. Bad weather in late 1917 saw the entire network nearly grind to a halt. On December 26, 1917, President Wilson put the US rail network under government control through a new agency - the United States Railway Administration (USRA).

Starting in February, the USRA established committees of locomotive designers and railroad operations staff to design standard locomotives to relieve the power shortage and reduce maintenance costs. The committees intentionally avoided experimental equipment (such as feedwater heaters) or exotic wheel arrangements; however, the committes were also forward-looking, avoiding antiquated designs which would soon be obsolete. Ultimately, the committees decided on 12 standard designs: two Mikados, two Pacifics, two Santa Fes, two Mountains, two Mallets and two Switchers. Components were standardized between types as much as possible to reduce manufacturing and maintenance costs. Dimensionally, the engines were comparable to examples of each wheel arrangement built in 1916 and 1917. Initial design work was completed in April 1918, with the designs being finalized in June 1918. The first USRA locomotive, a Light Mikado (2-8-2-A) for the Baltimore & Ohio, rolled out of the Baldwin factory in July 1918.

To accompany the standard designs, the committees designed three tenders. Much like the engines, the three tender designs reflected best practices of the pre-war era. In lieu of fabricated frames and trucks, all three tenders rode on Commonwealth cast steel frames and several different cast steel truck designs. Although three different water capacities were produced - 8,000 gallon for switchers, 10,000 gallon for road engines, and 12,000 gallon for the Mallets and 2-10-2-B - all shared a 16 ton coal bunk. These tenders were widely copied soon after the war, but were generally obsolete by 1930. Even so, these tenders enjoyed a long service life, with many examples operating to the end of steam.

USRA 10,000 Gallon Tender
Builder: Baldwin, Alco, or Lima
Empty weight: 69,800 lbs
Coal capacity: 16 tons
Water capacity: 10,000 gallons
Loaded weight: 184,800 lbs

Author: Ben Neal

UP Mk-Special 10K Gallon Tender (As Built)
• config.txt 12.00KB
• readme.html 20.12KB
reskins
usra_10k_clean.psd.tga 5.30MB
usra_10k_clean_mask.tga 3.00MB
• tender.gs 11.92KB
usra_10k_ten_alpha_numbers
alphanumber_0.texture.txt 61 bytes
alphanumber_0.tga 16.04KB
alphanumber_1.texture.txt 61 bytes
alphanumber_1.tga 16.04KB
alphanumber_2.texture.txt 61 bytes
alphanumber_2.tga 16.04KB
alphanumber_3.texture.txt 61 bytes
alphanumber_3.tga 16.04KB
alphanumber_4.texture.txt 61 bytes
alphanumber_4.tga 16.04KB
alphanumber_5.texture.txt 61 bytes
alphanumber_5.tga 16.04KB
alphanumber_6.texture.txt 61 bytes
alphanumber_6.tga 16.04KB
alphanumber_7.texture.txt 61 bytes
alphanumber_7.tga 16.04KB
alphanumber_8.texture.txt 61 bytes
alphanumber_8.tga 16.04KB
alphanumber_9.texture.txt 61 bytes
alphanumber_9.tga 16.04KB
usra_10k_ten_art
sa750_tender_art_icon.tga 32.04KB
thumbnail.jpg 7.66KB
usra_10k_ten_art_icon.texture.txt 75 bytes
usra_10k_ten_body
arn.lm.txt 209 bytes
arn.trainzmesh 2.03KB
digit_3.texture.txt 49 bytes
digit_4.texture.txt 49 bytes
digit_5.texture.txt 49 bytes
digit_6.texture.txt 49 bytes
digit_6.tga 16.04KB
lod1.im 252.76KB
lod2.im 119.43KB
lod3.im 6.86KB
shadow1.texture.txt 49 bytes
shadow1.tga 64.04KB
usra_10k.texture.txt 51 bytes
usra_10k.tga 4.00MB
usra_10k_normal.texture.txt 65 bytes
usra_10k_normal.tga 4.00MB
usra_10k_ten_body.lm.txt 299 bytes