SNCF Class CC 70000

SNCF Class CC 70000
The CC 70001
Type and origin Power type Diesel-electric Builder Alsthom-Chantiers de l'Atlantique/SEMT Build date 1965-1966 Total produced 2
Specifications Configuration: ​  • UIC C′C′ Gauge 1,435 mm (4 ft 8+1⁄2 in) Length 22.730 m (74 ft 7 in) Loco weight 117 tonnes (115 long tons; 129 short tons) Fuel type Diesel Prime mover Two SEMT Pielstick 16PA4 Alternator Alsthom ATD2 bi-rotor Traction motors 2× TAO 656 A Cylinders V16 Transmission Electric
Performance figures Maximum speed 140 km/h (87 mph) Power output 3,000 kW (4,000 hp)
Career Operators SNCF Numbers CC 70001–70002 Withdrawn 1983

SNCF Class CC 70000 was a class of two prototype high power diesel-electric locomotives numbered CC 70001 and 70002. They were built at the same time as a diesel-hydraulic version, SNCF Class BB 69000.

Powertrain

This was an innovative design in which two diesel engines drove a common alternator sited between them. There was no stator but two rotors spinning in opposite directions. Each diesel engine ran at 1,500 rpm so the effective rotational speed of the alternator was 3,000 rpm. There were two traction motors, each mounted on a 3-axle monomotor bogie.

External links

• "Photos of SNCF Class CC 70000 including a view of the engine-generator set". Locomotives Françaises 1950-2010.
• "CC 70000 - Photos et plans".
• "Sectioned side view of the locomotive".
• "Sectioned view of the Alsthom ATD2 alternator".