Withers The GP20 and SD24: EMD's Turbocharged Duo by Diesel Era Roadname_LS&I Air Force Thunderbirds demonstration team

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Withers The GP20 and SD24: EMD's Turbocharged Duo by Diesel Era Roadname_LS&I Air Force Thunderbirds demonstration teamWithers The GP20 and SD24: EMD's Turbocharged Duo by Diesel Era In 1959, the Electro Motive Division of General Motors began promoting two models that featured a mechanical device previously missing from any EMD locomotive. These models, the GP20 and SD24, were equipped with a turbocharger. While six axle trucks are common today, there was a time when locomotives with the six axle configuration were relegated to low speed drag service because of their