M-10000

The Union Pacific Railroad's M-10000, delivered to the railroad on February 12, 1934, at a cost of $230,997, was the first internal combustion engine, lightweight streamlined express passenger train in the United States. The carbodies and interior fittings were built by Pullman-Standard. The 600 hp (450 kW) V12 distillate engine was built by General Motors' Cleveland subsidiary, the Winton Engine Company. The Electro-Motive Corporation (EMC) supervised installation of the Winton engine into the Pullman-built body. This engine design was unrelated to the later 201 or 201A Winton diesels. EMC, being primarily a marketing organization during this time, did not manufacture any component parts of the M-10000. The air brake compressor, main generator, traction motors and control equipment were manufactured by the General Electric Company.

Pullman engineer Martin P Blomberg helped style the exterior of the M-10000 and the M-10001. The US Patent and Trademark Office assigned U.S. Patent D100,000, U.S. Patent D100,001, and U.S. Patent D100,002 for the design. The M-10000 featured a turret cab, an inward-slanting Duralumin body with a nose formed of parabolic arches, and large nose air intakes on each side of the centerline. The train was painted in Armour Yellow with Leaf Brown roof and undersides. Later, the area around the front air intake was also painted yellow. Dividing lines of red separated the colors.