Technical Details
The electrical supply available from the third rail—660 V DC—was identical to the requirements of diesel locomotive traction motors, enabling a fairly easy conversion to a dual-power locomotive. A DC electric compressor provided air until the diesel engine was started. Two batches of FL9s were built; 30 locomotives (including the original test units 2000 and 2001, originally built with a "Blomberg" front truck, but later upgraded following testing) from October, 1956 through November, 1957 of 1,750 hp (1,305 kW) from a EMD 567C engine; and 30 between June and November, 1960 of 1,800 hp (1,342 kW) from a newer EMD 567D1 engine. The paint scheme as delivered was the bright McGinnis scheme of red-orange, black and white and the Herbert Matter designed "NH" logo. FL9s were initially fitted with the Hancock air whistle, a trademark of New Haven units of this time, instead of the standard air horns on diesel locomotives.
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