The Union Pacific Railroad's M-10003, M-10004, M-10005, and M-10006 were four identical streamlined 2-car power car diesel-electric train sets delivered in May, June, and July 1936 from Pullman-Standard, with prime movers from the Winton Engine Corporation of General Motors and General Electric generators, control equipment and traction motors. One was for the City of San Francisco, two were for the City of Denver, and one was a spare set intended for both routes. In 1939, M-10004 was split and converted into additional boosters for the other sets, now renumbered CD-05, CD-06, and CD-07, all running on the City of Denver. The M-10001 power car became the other third booster. In this form, the three power sets ran until they were replaced by E8 locomotives in 1953, at which point they were scrapped.
The M-10004 trainset at Reno, Nevada on a trial run. Cars are of the tapered cross-section type used with M-10000 to M-10002.
One of the M-10003-6 trains (center left) along with EMD E6 locomotives and other streamlined cars.
A Union Pacific City of Denver (M-10005 or M-10006), 1940
A streamliner is a vehicle incorporating streamlining in a shape providing reduced air resistance. The term is applied to high-speed railway trainsets of the 1930s to 1950s, and to their successor "bullet trains". Less commonly, the term is applied to fully faired upright and recumbent bicycles. As part of the Streamline Moderne trend, the term was applied to passenger cars, trucks, and other types of light-, medium-, or heavy-duty vehicles, but now vehicle streamlining is so prevalent that it is not an outstanding characteristic. In land speed racing, it is a term applied to the long, slender, custom built, high-speed vehicles with enclosed wheels.
Preserved British steam locomotive of the former London, Midland and Scottish (LMS) Railway, Princess Coronation Class No. 6229 Duchess of Hamilton, an example of a streamliner
The Schienenzeppelin on the Erkrath-Hochdahl steep ramp in 1931
LNER Class A4 4468 Mallard traveling through Keighley in West Yorkshire in 1988
Nederlandse Spoorwegen class 3700/3800 steam locomotive 3804, circa 1936