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GE ES44AC

Centennials: Name given to Union Pacific's EMD DDA40X locomotives. World's most powerful diesel locomotives, delivered in 1969, the year of Union Pacific's centennial.[

Centennials: Name given to Union Pacific's EMD DDA40X locomotives. World's most powerful diesel locomotives, delivered in 1969, the year of Union Pacific's centennial.[

Control Stand:  A control stand is a diesel-electric locomotive subsystem which integrates engine functional controls and brake functional controls, whereby all functional controls are "at hand" (generally, within the operational radius of the locomotive engineer's left forearm from his customary seating position, facing forward at all times). RailPictures.Net Photo: MBTA 1003 Massachusetts Bay Transportation Authority (MBTA) EMD F40PH at Somerville, Massachusetts by Christopher Kelliher

Control Stand: A control stand is a diesel-electric locomotive subsystem which integrates engine functional controls and brake functional controls, whereby all functional controls are "at hand" (generally, within the operational radius of the locomotive engineer's left forearm from his customary seating position, facing forward at all times). RailPictures.Net Photo: MBTA 1003 Massachusetts Bay Transportation Authority (MBTA) EMD F40PH at Somerville, Massachusetts by Christopher Kelliher

Wings/Flags/Flares (W/F/F): Characteristics used to designate Union Pacific's paint scheme and engine type. Wings = "Wing" Decal on the engine nose, Flags = "American Flag" Decal on engine body, Flares = "Flared Radiators" of certain SD70Ms on the long hood. Some UP engines have one or more of these characteristics

Wings/Flags/Flares (W/F/F): Characteristics used to designate Union Pacific's paint scheme and engine type. Wings = "Wing" Decal on the engine nose, Flags = "American Flag" Decal on engine body, Flares = "Flared Radiators" of certain SD70Ms on the long hood. Some UP engines have one or more of these characteristics

Buda Car: A type of inspection car or speeder, typically streamlined, manufactured by the Buda Engine Co. Sometimes built out of an ordinary automobile body, with flanged wheels added. It was driven by small engines from 30 to 200 horsepower.

Buda Car: A type of inspection car or speeder, typically streamlined, manufactured by the Buda Engine Co. Sometimes built out of an ordinary automobile body, with flanged wheels added. It was driven by small engines from 30 to 200 horsepower.

Grab Iron: Steel bar attached to cars and engines as a hand hold.

Grab Iron: Steel bar attached to cars and engines as a hand hold.

Mud Missile: Derogatory nickname given to GE Genesis locomotives, in reference to their involvement in the 1993 Big Bayou Canot train disaster.

Mud Missile: Derogatory nickname given to GE Genesis locomotives, in reference to their involvement in the 1993 Big Bayou Canot train disaster.

Cadillac: A nickname for EMD SD9 locomotives, in reference to their smooth ride quality reminiscent of a Cadillac automobile. This nickname is said to have originated on the Southern Pacific Railroad.

Cadillac: A nickname for EMD SD9 locomotives, in reference to their smooth ride quality reminiscent of a Cadillac automobile. This nickname is said to have originated on the Southern Pacific Railroad.

Hammerhead: A GE locomotive with "winged" radiators, when running long hood forward. - A nickname given to certain early ALCO roadswitchers with a high nose, as well as the GE BQ23-7.

Hammerhead: A GE locomotive with "winged" radiators, when running long hood forward. - A nickname given to certain early ALCO roadswitchers with a high nose, as well as the GE BQ23-7.