Martin Petrus Frederik Blomberg (December 11, 1888, in Östervåla, Sweden — March 29, 1966, in Winter Park, Florida) was an American engineer of Swedish origin.
From 1912 to 1914, he worked in Trois-Rivières, Quebec in a paper mill, and studied technical drawing and mechanical construction in an evening school.
From 1925 to 1935, Blomberg worked for the Pullman Company, where he was responsible for the construction of railroad truck frames and passenger car bodies.
[2] Among his designs he assisted at Pullman were the Union Pacific M-10000 in 1934 (U.S. patent D100,000), and the Brooklyn Rapid Transit "Green Hornet", lightweight MS Multi-section car (New York City Subway car) for use on the BRT elevated transit lines in Brooklyn, New York.
In 1939 he designed the four-wheel flexible truck frame from the three-axle version for the new diesel-electric freight locomotive called the EMD FT.