Cowls on the Prowl.
Santa Fe had been first to order the FP45—intended as a dual service machine used passenger service and for fast freight. The only other customer for the FP45 was Milwaukee Road which bought five of them. Significant of these designs was the external semi-streamlined cowling leading the locomotive’s ‘Cowls’ nickname.
EMD’s F45 was intended primarily for freight so it didn’t feature a large steam generator. As a result it was several feet shorter. Santa Fe ordered 40, while along with Great Northern and its successor Burlington Northern, bought 56 F45s. Like its SD45, EMD rated both FP45 and F45 at 3,600 hp.These locomotives had a similar appearance to the SDP40F and F40C (see: Locomotive Geometry Part 4).
Although Wisconsin Central operated seven of the big cowled EMDs, I found these to be relatively elusive when compared to WC’s far more common SD45s. Yet, I count myself fortunate to have caught the cowl 20-cylinder locomotives at various occasions, both in Santa Fe and Wisconsin Central paint.