ALCO RSD-15

The is a American locomotive class.
==History==
Built by the American Locomotive Company between August 1956 and June 1960, 75 locomotives were produced.
The locomotive rode on a pair of three-axle Trimount trucks, in an AAR C-C wheel arrangement, with all axles powered by General Electric model 752 traction motors. These trucks have an asymmetrical axle spacing due to the positioning of the traction motors. The six-motor design allowed higher tractive effort at lower speeds than an otherwise similar four-motor design.
The RSD-15 could be ordered with either a high or low short hood; railfans dubbed the low short hood version "Alligators", on account of their unusually long low noses.
==Locomotives==
Railroad 	Quantity	Road numbers	Notes
Atchison, Topeka and Santa Fe Railway 	50 	800–849 	Low nose
Duluth, Missabe and Iron Range Railroad	6 	50–55 	Later Bessemer and Lake Erie Railroad 881-886
Pennsylvania Railroad 	6 	8611–8616 	Later Penn Central 6811–6816.
Southern Pacific Railroad 	3 	250–252 	Low nose
St. Louis Southwestern Railway 	10 	5150–5159 	Low nose
Canadian Pacific Railway 	1 	8921 	RSD-17
==Gallery==
Category:Diesel Classes
Category:American Classes
Category:ALCO Classes