Wikipedia

USRA 2-8-8-2

The USRA 2-8-8-2 was a USRA standard class of steam locomotive designed under the control of the United States Railroad Administration, the nationalized railroad system in the United States during World War I. These locomotives were of 2-8-8-2 wheel arrangement in the Whyte notation, or (1'D)'D1' in UIC classification. A total of 106 locomotives were built to this plan for the USRA; postwar, it became a de facto standard design.

USRA 2-8-8-2
Virginian No. 900, prior to its refusal by the Virginian Railway. It (and VGN Nos. 901–904) became Norfolk and Western Y3 class locomotives Nos. 2000–2004.
Type and origin
Power typeSteam
BuilderALCO, Baldwin
Total produced80 originals, (plus 81 copies)
Specifications
Configuration:
​
 • Whyte2-8-8-2
 • UIC(1′D)D1′ h4v
Gauge4 ft 8+1⁄2 in (1,435 mm)
Driver dia.57 in (1,448 mm)
Adhesive weight474,000 lb (215.0 t)
Loco weight531,000 lb (240.9 t)
Fuel typeCoal
Boiler pressure240 lbf/in2 (1.65 MPa)
CylindersFour, two LP (front), two HP (rear)
High-pressure cylinder23 in × 32 in (584 mm × 813 mm)
Low-pressure cylinder39 in × 32 in (991 mm × 813 mm)
Valve gearBaker
Loco brakeAir
Train brakesAir
Performance figures
Tractive effort101,300 lbf (450.6 kN)
Career
DispositionOne copy (N&W 2050) preserved, remainder scrapped

History

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While the 2-8-8-2 had been built in the United States since 1909,[1] most development work had gone into making subsequent locomotives larger and heavier. The Norfolk and Western Railway however, had taken development in a different direction. By using smaller cylinders and higher boiler pressure, the result was a locomotive capable of powerful performance, and a turn of speed higher than the 20 mph (32 km/h) maximum of the ‘traditional’ designs.[1]

The USRA 2-8-8-2 drew heavily on the Norfolk and Western Railway’s Y2 class locomotive design, as their delegate to the 2-8-8-2 design committee had brought a full set of blueprints.[2]

Original owners

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USRA originals

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Railroad Quantity Class Road numbers Notes
Clinchfield Railroad
10
L-2
725–734
 [3]
Norfolk and Western Railway
45
Y3
2005–2049
 [4]
Virginian Railway
5
—
900–904
 Refused, to Norfolk and Western 2000–2004[5]
Virginian Railway
20
USA
701–720
 [5]
Total 80

Copies

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Railroad Quantity Class Road numbers Notes
Clinchfield Railroad
10
L-3
735–744
 [3]
Denver and Rio Grande Western Railroad
10
L-107
3500–3509
 [6]
Interstate Railway
2
 Class 20
20-21
 [1]
Norfolk and Western Railway
30
Y3a
2050–2079
 [4]
Norfolk and Western Railway
10
Y3b
2080–2089
 Later reclassified as Y-4’s[4]
Northern Pacific Railway
4
Z-4
4500–4503
 [7]
Virginian Railway
15
USB
721–735
 [5]
Total 81

Preservation

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Main article: Norfolk and Western 2050

While none of the original USRA 2-8-8-2’s are preserved, one of the copies is. Norfolk and Western 2050, a 1923 ALCO product of N&W's Y3a class, is on static display at the Illinois Railway Museum in Union, Illinois.

References

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Notes

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  1. ^ a b c E. W. King, Jr. in Drury pp.298–299
  2. ^ E. W. King, Jr. in Drury p.299
  3. ^ a b Drury pp.131, 133
  4. ^ a b c E. W. King, Jr. in Drury pp.299, 308
  5. ^ a b c E. W. King, Jr in Drury pp.417, 419
  6. ^ Drury pp.157, 161
  7. ^ Drury pp.310, 317

Bibliography

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  • Drury, George H. (1993), Guide to North American Steam Locomotives, Waukesha, Wisconsin: Kalmbach Publishing Company, ISBN 0-89024-206-2, LCCN 93041472
  • Westcott, Linn H. (1960). Model Railroader Cyclopedia, volume 1, Steam Locomotives. Milwaukee, Wisconsin: Kalmbach Publishing Company. ISBN 0-89024-001-9.
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