ATSF 3450 class
ATSF No. 3450 on static display at the RailGiants Train Museum
Type and origin Power type Steam Builder Baldwin Locomotive Works Build date 1927 Total produced 10
Specifications Configuration: ​  • Whyte 4-6-4  • UIC 2′C2′ h2s Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Driver dia. 73 in (1,854 mm), later: 79 in (2,007 mm) Length 97 ft 11 in (29.85 m) Adhesive weight 198,000 lb (90,000 kilograms; 90 metric tons), later: 206,000 lb (93,000 kilograms; 93 metric tons) Loco weight 343,900 lb (156,000 kilograms; 156.0 metric tons), later: 352,600 lb (159,900 kilograms; 159.9 metric tons) Tender weight 283,000 lb (128,000 kilograms; 128 metric tons), later: 298,600 lb (135,400 kilograms; 135.4 metric tons) Total weight 626,500 lb (284,200 kilograms; 284.2 metric tons), later: 651,200 lb (295,400 kilograms; 295.4 metric tons) Fuel type Coal (later converted to oil in the 1930s) Fuel capacity 5,000 US gal (19,000 L; 4,200 imp gal) Water cap. 15,000 US gal (57,000 L; 12,000 imp gal) Firebox: ​  • Grate area 88 sq ft (8.2 m2) Boiler pressure 220 lbf/in2 (1.52 MPa), later: 230 lbf/in2 (1.59 MPa) Cylinders Two, outside Cylinder size 25 in × 28 in (635 mm × 711 mm) Valve gear Walschaerts Valve type Piston valves
Performance figures Maximum speed 110 mph (177 km/h)[1] Tractive effort 44,250 lbf (196.8 kN), later: 43,307 lbf (192.6 kN) Factor of adh. 4.42, later: 4.76
Career Operators Atchison, Topeka & Santa Fe Railway Numbers 3450–3459 Preserved One (No. 3450) preserved, remainder scrapped Disposition No. 3450 on display at the RailGiants Train Museum in Pomona, California

The Santa Fe class 3450 consisted of ten 4-6-4 "Hudson" type steam locomotives built by the Baldwin Locomotive Works in 1927. Built as coal-burners, they were later converted to oil-burning during the 1930s. At the same time, the locomotives were given 79-inch (2,007 mm) driving wheels instead of their original 73-inch (1,854 mm), and the boiler pressures increased from 220 to 230 lbf/in² (1.52 to 1.59 MPa). Combined, these changes reduced the starting tractive effort from 44,250 to 43,300 lbf (196.8 to 192.6 kN), but increased the top speed and efficiency. Their early service was in the Midwest, between Chicago and Colorado; later, some were assigned to service in the San Joaquin Valley of California between Bakersfield and Oakland.

They were smaller and less powerful locomotives than the later 3460 class "Hudson" type, but were capable of equivalently high speeds.

The first locomotive built, No. 3450, was donated by the Santa Fe in 1955 to the Railway & Locomotive Historical Society's Southern California chapter, and is preserved at the Society's museum in the Los Angeles County Fair grounds at Pomona, California. The locomotive sits inside the RailGiants Train Museum. It is not operational, but preserved in good condition as a static exhibit. It received a cosmetic restoration between 2013-2021.

Other Images

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  3450 4-6-4 steam locomotive
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  Front of #3450
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  Side of #3450

References

• "Atchison, Topeka and Santa Fe 3450". Southern California Chapter, Railway & Locomotive Historical Society. Archived from the original on 2005-03-17. Retrieved 2006-01-22.
• Barris, Wes. "Atchison, Topeka & Santa Fe Hudsons". SteamLocomotive.com. Archived from the original on 3 January 2023. Retrieved 2023-01-03.
• Glischinski, Steve (1997). Santa Fe Railway. Osceola, WI: Motorbooks International. ISBN 978-0-7603-0380-1.

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