UP #1366 on Cajon Pass

Union Pacific #1366

Mojave Northern Railroad

Diesel-Electric Locomotive

UP #1366
This high-hood Raymond Loewy-styled end-cab demonstrator is the museum's most powerful locomotive, with an unusual opposed-piston engine. It was one of the first 96 single-engine B-B freight hoodtype 2,000 hp Diesel-electric, and is one of only three survivors.

Built by Fairbanks-Morse Company, Beloit, Wi; June 1947

This model H-20-44 road switcher was designed for freight use with no short hood, thus no space for a steam boiler for passenger train use. Builder's #L1032 with engine 866563, it weighs 254,000 lbs. (127 tons); is 51' long, 10' 6" wide, 14' 6" high; has 42" wheels in a B-B arrangement; and Timken roller bearings. It has a 38D8 1/8 2-cycle opposed-piston engine with ten 8 1/8" x 10" cylinders that develop 2,000 hp at 850 rpm; 4 Westinghouse 37OF traction motors; a tractive effort of 42,800 lbs. at 14.7 mph; a 63:15 gear ratio; a 70 mph top speed; and is MU-capable. It and builder's #L1031 were both demonstrators numbered FM #2000 for their horsepower, but painted in different schemes. In red-orange with pinstripes, #L1032 was exhibited at the August 1947 American Association of Railways convention in Atlantic City, NJ.

On October 17, 1947 both units and nine other H-20-44s were delivered to the Union Pacific Railroad for $250,000 each, in Armour yellow with Harbormist grey hood & cab tops and underframes; red striping & letters; and green cab/engine room interiors. They were numbered UP #D.S. 1360-70. The "D.S."(later deleted) differentiated Diesels from steam locomotives. FM #2000 (LlO32) became #D.S. 1366, with "Serves All the West" and "Road of the Streamliners" on its cab sides. Used as helpers over Cajon Pass, and from Barstow to Kelso in California's Mojave desert, the H-20-44s had problems with heat and altitude, and proved difficult to maintain. As 500 HP per axle wasn't generally accepted at the time, only 96 H-20-44s were sold.

Retired in November 1962, UP #1366 was sold to the Southwestern Portland Cement Company in 1963. It's "13" painted over, it worked as #66 on SWPC's 15-mile Mojave Northern Railroad from Victorville, Ca. to its mountain quarry, handling 500-ton trains on the line's 3.5% grade. Air filters were added to its air intake openings for cement plant dust protection, and the cab was air-conditioned for desert summers. In 1969 its yellow areas were painted green and it was renumbered SWPC #408 in red, retaining its grey & red areas.

Appraised at $62,000 by Chrome Crankshaft Company in August 1983, SWPC #408 was donated to the PSRMA May 15, 1984 and moved by the Santa Fe and SD&AE to La Mesa depot, arriving July 5, 1984. In 1987 it, was moved to San Ysidro by the SD&IV, and on February 28, 1987 it pulled "Great Freight II" (20 pieces of museum equipment weighing about 1,460 tons) up the 49.6-mile, 1.4% grade from San Ysidro to Campo at an average speed of 10 mph, with only two brief stops caused by ground relay trips. In March 1987 it returned to Matanuca (12 miles east of San Ysidro) and pulled the four-car "Great Freight II 1/2" to Campo.

The locomotive was reconditioned, renumbered #1366 and repainted Armour Yellow in 1998.

1992 Pacific Southwest Railway Museum Association. W. Schneider

Page by Randy Houk, updated 1-12-2012