f40ph
the general motors electro-motive division model f40ph is a 3000 horsepower (2.2 mw) b-b diesel-electric locomotive intended for service on amtrak’s intercity lines, built from 1976 onwards. this locomotive is equipped with a turbocharged 645e3 16 cylinder, two-stroke, water-cooled “vee” diesel engine (prime mover) that develops 3,000 tractive horsepower (2.2 mw) at maximum rpm. the main (traction) generator converts mechanical energy from the prime mover into electrical energy that is distributed through a high voltage cabinet to the traction motors. each of the four traction motors are directly geared to a pair of driving wheels. the gear ratio of the traction motors to wheel axle determines the maximum operating speed of the locomotive; a standard f40ph has a gear ratio of 57:20 which provides a top speed of 103 mph (166 km/h). introduction of the f40ph series was spurred as a replacement for the emd sdp40f type, amtrak’s first series of locomotives built new for them since inception in 1971.
father: it’s f40ph time!
boy: no dad, no!
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