ČKD T-669 diesel locomotive

4 ft 8+1⁄2 in) standard gauge -
1,520 mm (4 ft 11+27⁄32 in)
1,676 mm (5 ft 6 in)Wheel diameter1,050 mm (41.34 in)Wheelbase8,660 mm (28 ft 5 in)Length17,240 mm (56 ft 6+3⁄4 in)Loco weight115 t
(113 long tons; 127 short tons)Fuel typeDieselPrime moverČKD K 6 S 310 DRRPM range750Engine typeDieselCylinders6Cylinder size310 mm × 360 mm
(12.2 in × 14.2 in)TransmissionDC ElectricMU workingyes

Performance figures
Maximum speed	90 km/h (56 mph)
Power output	993 kW (1,332 hp)

T-669.0 (770) class diesel locomotives, built by ČKD are six-axle, with two bogies. The wheel pairs are set in radius arms and have a simple coil spring suspension. The body is mounted on the frame with eight anchors. The locomotive is a hood unit type with an internal, eccentrically positioned operator's cab.

Machinery

Located underneath the front hood is the traction assembly – a K 6 S 310 DR diesel engine and a TD 802 traction generator – and auxiliary machinery powered by the diesel engine via a hydrodynamic transmission. Chillers and ventilators are located here as well. TE 006 traction motors are axle-mounted on the wheel sets. Located underneath the rear hood are batteries and a supply of sand.

Variations

After modifications of the seating of the hood on the frame, the T 669.1 (771) and the wide-gauge version T 669.5 (770.8) were created at SMZ Dubnica.

Users

This class of locomotive, manufactured for Czechoslovak State Railways, Soviet Railways, and railways in Poland, Albania, India, Iraq and Syria numbers over 8,000 units, making it the largest series of locomotives ever manufactured in Czechoslovakia.

See also

• ChME3

References

• atlas vozidel (z roku 2009), Motorové lokomotivy v ČR a na Slovensku, M-Presse, Praha 2009
• Heiko Rüdiger: Der Flug der Hummeln. Die Diesellokomotiven der Reihen 770/772 in Tschechien und der Slowakei. edition bohemica, Himmelkron 2009, ISBN 978-3-940819-06-2
• Helmut Petrovitsch: Europas meistgebauter Dieselbrummer. In: eisenbahn-magazin 6/2014, S. 6–13
• Der Modelleisenbahner 8/1972, Fahrzeugarchiv, Seite 251, Organ des DMV

External links

• www.t669.org