EMD SD70ACu

EMD SD70ACu

NS 7248, one of the first SD70ACu models, sits outside the shops at Altoona, PA.
Type and origin
Power type Diesel-electric
Builder Norfolk Southern
Model EMD SD70ACu
Build date 2015-present
Rebuilder Norfolk Southern
Specifications
AAR wheel arr. C-C
UIC class Co′Co′
Gauge 4 ft 8 1⁄2 in (1,435 mm) standard gauge
Trucks EMD Radial Steering
Wheel diameter 42 in (1,067 mm)
Length 80 ft 2 in (24.43 m)
Width 10 ft 2 in (3.10 m)
Fuel capacity 5,000 gallons
Prime mover EMD 16-710 G3B
Engine type V16 diesel engine
Aspiration Turbocharged
Cylinders 16
Performance figures
Maximum speed 75 MPH
Power output 4,300 hp (3,207 kW)
Career
Operators Norfolk Southern
Locale North America
Current owner Norfolk Southern
Disposition Several units currently in rebuild process with 32 completed as of August 2016

The EMD SD70ACu is 6-axle a 4,300 hp (3,207 kW) diesel-electric locomotive originally built by EMD, and rebuilt by Norfolk Southern at its shops in Altoona, Pennsylvania. The first locomotive entered the rebuilding process in November 2015. 46 of these locomotives are now in service as of November 2016.

All of the SD70ACus will be rebuilt with the latest EMD cab which meets current FRA crashworthiness standards. The Siemens electronics will be replaced with Mitsubishi electronics. The rebuild also includes the installation of Ultra Cab II, locomotive speed limiter (LSL), and cab signals. The trucks will be rebuilt only as-needed and they are not getting traction motors swapped out.

History

An EMD SD9043MAC, the units that are being rebuilt into the SD70ACu.

The units that will be rebuilt are all ex-Union Pacific EMD SD90MAC locomotives. The SD90MAC was introduced in 1995 and was designed to use the new 16-cylinder, 6,000-horsepower (4,500 kW) H-engine. However, technical problems with the 265 engine resulted in the locomotives being delivered with the 4,300 hp (3,210 kW) 16-cylinder 710G used in EMD's SD70MAC. UP referred to these locomotives as SD9043MACs, and EMD planned to offer customers the option to upgrade them to the 6,000 hp (4,470 kW) 265 engine at a later date. EMD's upgrade program, however, was never carried out due to unresolved reliability issues with the 265. Over 400 SD90MAC locomotives fitted with the 4,300 hp (3,210 kW) 710 engine were built. 100 units originally ordered by Union Pacific were sold to Norfolk Southern as part of the SD70ACu rebuild program. EMD is responsible for delivering the locomotives, and as of November 2015, all units have been delivered. They are numbered 7229-7328. In July 2016, Norfolk Southern acquired another 10 SD90MAC locomotives from CIT Financial and the Indiana Railroad for the SD70ACu program. They will be numbered 7329-7338.

See also

EMD SD70 series - A list of the many variants of SD70s EMD has produced.

References

    This article is issued from Wikipedia - version of the 11/12/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.