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Southern Pacific Steam Power

Pictures on these pages are N scale models of the Southern Pacific Steam Locomotives I have.
Prototype basic historic informations are desumed from sources listed above.
If some of you found errors or have additional informations,
please contact me via e-mail, and I will provide page update and credits.

Last upd. Nov-2009

P-5 - P-6 Class Pacific 4-6-2
P #2454 (Model Power)
 
P #3298 (Model Power)

HARRIMAN 4-6-2 LlGHT

The first Pacifics in the Common Standard program were light engines with Stephenson valve gear and inboard trailing trucks, and most were built by Baldwin. The class was used widely on the Harriman roads and in time most of the engines were rebuilt with Walschaerts or other valve gear and superheating.
On the Southern Pacific weight and tractive effort were increased and boosters were often added.

Some early engines were built as compounds with 17" and 28" by 28" cylinders.
After superheating made them obsolete, they were rebuilt as simple engines in 1915. These were on the OSL and OWRR&N. The Alton locomotives eventually became B&O engines. Some SP engines had cylin­ders increased to 23" diameter, creating class P4. Other SP engines were classes Pl, P3 and P5, and were built as late as 1912 and copied as late as 1918.

Specifications of the originai engines were 22" by 28" cylinders, 77" drivers, 200 pounds pressure, weight 214,000 pounds and tractive effort 29,900 pounds. The Southern Pacific P5 version of 1912 built by Baldwin was heavier and had 31,420 pounds tractive effort. You can tell these light Pacifics from most other engines on the ex-Harriman roads because these had straight-top rather than tapered boilers.

4·6·2 PACIFIC - Total engines: 146

Pacific Lines .............................................................. 112
Texas Lines .................................................................. 37

The Southem Pacific rather cautiously approached the subject of the Pacific type locomotive, for the initial order was for but five, these being outshopped by Schenectady in 1904, factory numbers 30,000 to 30,004. (Schenectady factory 30,005 to 30,020 were also for the SP - sixteen Atlantic type engines.) The table below set up by class the various groups of Pacifics acquired, and gives basic pecifications but a few supplementary remarks are necessary.
Class P-2 was vacant.
The Class P-4 engines, ten in number, were all rebuilt, nine from Class P-1 and one from Class P-3.
Three P-6's were transferred from the Pacific to the Texas lines in 1937, rebuilt at Houston and classified P-14.
The only two engines in class P-7 carne from the Arizona Eastem in 1922.
The ten P-11's and ten P-12', the only Pacifics coming second-hand to the SP, were acquired in 1924 with the El Paso & Southwestem Railroad.

The Pacific Lines numbering was 2400-2491 and 3100-­3109 and 3120-3129.
The Texas Lines numbering was from 600-633 and 650-652.

The 4-6-2's were in general use throughout the system.
The first one scrapped was in 1939, while a few others remained on the roster until near the end of steam usage.

 

 

 

 

Total

 

Tractive

 

 

Class

Numbers

Drivers

Cylinders

Weight

BP

Effort

Builder

Date

P-1l

2400-2404

77

22x28

222000

210

31420

Schenectady

1904

P-1

2405-2427

77

22x28

222000

210

31420

Baldwin

1906-1907

P-3

2428-2437

77

22x28

222000

210

31420

Baldwin

1911

P-3

2459-2460

77

22x28

234200

210

31420

SP-Sacramento

1918

P-4

2401-2436

77

23x28

265100

210

34320

Rebuilt

1924

P-5

2438-2452

77

22x28

220900

210

31420

Baldwin

1912

P-5

600 - 609

77

22x28

243700

210

31420

Baldwin

1912

P-6

2453-2458

77

25x28

287000

200

38640

Brooks

1913

P-6

610 - 621

77

25x28

291200

210

40570

Brooks

1913

P-7

2476-2477

73

25x28

276000

200

40750

Lima

1917

P-8

2461-2475

73

25x30

300000

210

43660

Baldwin

1921

P-9

622 - 630

73

25x30

307300

210

45850

Baldwin

1923

P-1O

2478-2491

73

25x30

300000

210

45850

Baldwin

1923-1924

P-11

3100-3109

68

24x26

239500

180

33700

Baldwin

1907

P-12

3120-3129

73

26x28

309100

205

45180

Brooks

1917

P-13

631 - 633

73

25x30

313800

210

45850

Baldwin

1928

P-14

650 - 652

77

25x28

307500

210

40570

Rebuilt

1937

Source : A Century of SP Steam Locomotives - Guy L. Dunscomb

Source for classification and historical info used

On Line References :

OFF Line References ( sometimes called "Books" ) :

  • A Century of SP Steam Locomotives - Guy L. Dunscomb
  • Southern Pacific Steam Pictorial - Guy l.Dunscomb, Donald K.Dunscomb, Robert A.Pecotich Vol.1 & Vol.2
  • SP Co. Steam Locomotive Compendium - Diebert & Strapac
  • Steam Locomotives Cyclopedia- Vol.1- Model railroader - Linn H.Westcott
  • Southern Pacific Pacific 2-8-2 Pictorial Volume _ - Jeff Ainsworth - Monte Vista Publishing

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