Talk:EMD GP20

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Turbochargers edit

Latest comment: 18 years ago1 comment1 person in discussion

See Don Strack's article on turbocharging the GP9 that led directly to EMD's GP20 here: http://utahrails.net/webpubs/up-gp9-turbo.php --SSW9389 00:07, 26 November 2005 (UTC)Reply

Traction motor limitations edit

Latest comment: 5 years ago1 comment1 person in discussion

"Power output of the turbocharged SD24 was 33 percent higher than the 1,800 hp (1,340 kW) of the concurrent Roots blower-equipped SD18s with the same engine displacement, 400 hp (298 kW) per axle, but the power output of the turbocharged GP20 was only 11 percent higher than the 1,800 hp (1,340 kW) of the concurrent Roots blower-equipped GP18s with the same engine displacement 500 hp (373 kW) per axle, due to the limitations of the traction motors then available (this limitation was eliminated in the 40-Series). "

No, this limitation was eliminated with the 35 series. The four motor EMD GP35 shared the same horsepower rating as the six axle SD35 counterpart, 2,500 horsepower. — Preceding unsigned comment added by 2604:6000:A645:2100:357B:E726:8525:6B0E (talk) 00:15, 1 January 2019 (UTC)Reply

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