The GP20 and SD24 locomotive models can trace their roots to the horsepower race that began in earnest in 1952 when Fairbanks-Morse began promoting its newest creation, the 2,400-horsepower Train Master. Also competition outside the industry as motor carriers were increasingly taking away long-haul shipments from railroads caused carriers to look at ways to speed up train schedules - and this translated into more horsepower.
To get that necessary increase in horsepower, EMD installed turbochargers for the first time ever on factory-delivered diesel-electrics. This book discusses the competition between the loco builders and details EMD's first turbocharged models.
Contents:1. Why Turbo charge, pp. 5-8;2. New Models, New Features, pp. 9-12;3. Specifications, pp. 13-18;4. SD24 Production, pp. 19-22;5. GP20 Production, pp. 23-28;6. Car-body Phases, pp. 29-32;7. SD24 Roster, pp. 33-37;8. GP20 Roster, pp. 38-44;9. SD24s in Service, pp. 45-62;10. GP20s in Service, pp. 63-90;11. Secondhand SD24s, pp. 91-98;12. Secondhand GP20s, pp. 99-104;13. Detail Views, pp. 105-112;14. Colorful GP20s and SD24s, pp. 113-132;15. Bibliography, pg. 133;16. Index, pp. 134-136;17. HO Scale Fold-out Plans, pp. 137-152.
Withers Publishing, softcover, 152 pages, standard portrait book 8 x 10 in., B&W and Color photographs, HO Scale fold-out plans.