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Roots Blower Company. A Roots blower with two-lobed rotors. Modern Roots blowers may have 2- or 3-lobed rotors. The Roots Blower Company was an American engineering company based in Connersville, Indiana. It was founded in 1854 by the inventors Philander Higley Roots and Francis Marion Roots.
EMD 645. The EMD 645 is a family of two-stroke diesel engines that was designed and manufactured by the Electro-Motive Division of General Motors. While the 645 series was intended primarily for locomotive, marine and stationary engine use, one 16-cylinder version powered the 33-19 "Titan" prototype haul truck designed by GM's Terex division.
The Roots blower is a positive displacement lobe pump which operates by pumping a fluid with a pair of meshing lobes resembling a set of stretched gears. Fluid is trapped in pockets surrounding the lobes and carried from the intake side to the exhaust. The Roots blower design does not incorporate any reduction in volume/increase in pressure as ...
The Model 248 was offered in 8, 12 and 16-cylinder V type layouts. The two-stroke, Uniflow-scavenged engines employ a gear driven Roots blower on the front of the engine which provided aspiration for the cylinders. It is a medium speed marine diesel designed to operate at 750 rpm.
EMD 645. The EMD 567 is a line of large medium-speed diesel engines built by General Motors' Electro-Motive Division. This engine, which succeeded Winton's 201A, was used in EMD's locomotives from 1938 until its replacement in 1966 by the EMD 645. It has a bore of 81⁄2 in (216 mm), a stroke of 10 in (254 mm) and a displacement of 567 cu in (9 ...
But, unlike the earlier 645 and 567, which could use either turbochargers or Roots blowers, the turbocharger is a standard feature of most 710 models. Horsepower for any naturally aspirated engine is usually derated at 2.5% per 1,000 feet (300 m) above mean sea level, a penalty which becomes extremely large at altitudes of 10,000 feet (3,000 m ...
Chesapeake and Albemarle 2158 (an ex-ATSF GP7U) in Chesapeake, VA. OmniTrax 4433 (a GP7 rebuilt by the Chicago and North Western Railway) spotted on CSX in Augusta, Georgia. The EMD GP7 is a four-axle (B-B) diesel-electric locomotive built by General Motors Electro-Motive Division and General Motors Diesel between October 1949 and May 1954.
Electro-Motive Diesel (abbreviated EMD) is a brand of diesel-electric locomotives, locomotive products and diesel engines for the rail industry. Formerly a division of General Motors, EMD has been owned by Progress Rail since 2010. [2][3] Electro-Motive Diesel traces its roots to the Electro-Motive Engineering Corporation, founded in 1922 and ...