Martin P. Blomberg

Martin Petrus Frederik Blomberg (December 11, 1888, in Östervåla, Sweden — March 29, 1966, in Winter Park, Florida) was an American engineer of Swedish origin. He became well known for the development of the truck frame for the diesel-electric locomotives of the Electro Motive Division (EMD).

Early life Blomberg grew up as a son of a teacher and minister. He graduated from the technical institute in Örebro, and in 1910 went to the university at Uppsala. In this time, he was very active and trained for the Olympic Games of 1912 in Sweden. Among his designs he assisted at Pullman were the Union Pacific M-10000 in 1934 , 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.

Electro-Motive On September 1, 1935, he accepted a position in the Electro-Motive Corporation (from 1941, it was renamed to Electro-Motive Division of General Motors). There Blomberg was given responsibility for the construction of locomotive bodies, frames and truck frames. The EMC E4 diesel-electric locomotive was mostly his design, including the three-axle (A1A) truck. 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. This four-wheel truck frame and its derivations were incorporated in more than 15,000 locomotives. Unofficially, but generally accepted, the two-axle trucks, Blomberg B and Blomberg M, are named after him. The two-axle AAR Type A switcher truck is also a Blomberg design.

Blomberg registered over 100 patents with the US Patent and Trademark Office during his 32 years with EMD. In 1947, he became lead engineer after the chief engineer of EMD.

Retirement On 1 June 1949, he retired. He died on March 29, 1966, at the age of 77 in Winter Park, Florida.