SNCF Y 51100: French prototype shunter diesel locomotive

SNCF Class Y51100

The Y 51100 is a prototype shunting locomotive developed by the French SNCF based on the Y 9100.

They were nicknamed “yoyos” because they were constantly moving around the marshalling yard. These locomotives entered service between 1953 and 1956 and were withdrawn from service in 1985.

Manufacturer: ANF (Alstom) / SACM / Ateliers de Sotteville QM.

Assembly: Sotteville/Crespin (France)

Years of production: 1953—1956

Production: 50 units

Length: 9360 mm

Width: 2960 mm

Height: 3900 mm

Track gauge: 1435 mm

Powerplant: Renault type 565 (V12)

Continuous power: 308 kW

Max speed: 23 km/h

Weight: 34 t

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