Remote control locomotive

History

United Kingdom

One of the earliest remote control locomotives was the GWR Autocoach, which replaced steam rail motors on both operational cost and maintenance grounds. When running 'autocoach first', the regulator is operated by a linkage to a rotating shaft running the length of the locomotive, passing below the cab floor. This engages (via a telescopic coupling) with another shaft running the full length below the floor of the autocoach. This shaft is turned by a second regulator lever in the cab of the autocoach. The driver can operate the regulator, brakes and whistle from the far (cab) end of the autocoach; the fireman remains on the locomotive and (in addition to firing) also controls the valve gear settings. The driver can also warn of the train's approach using a large mechanical gong, prominently mounted high on the cab end of the autocoach, which is operated by stamping on a pedal on the floor of the cab. The driver, guard and fireman communicate with each other by an electric bell system.

North America

In North America remote controlled locomotives have been in use since the 1980s. In 1988, the US Occupational Safety and Health Administration issued a hazard information bulletin regarding their use. By 1999 Canadian National had 115 locomotives equipped with remote control equipment, covering 70% of flat-yard switching and all of its hump yard operations. Canadian National estimated a savings of CA$20 million per year vs. traditional switching operations.

The Brotherhood of Locomotive Engineers and Trainmen expressed concerns about remote control locomotives. The union said that remote control locomotives were not as efficient as traditional engineer-in-cab switching operations while being more dangerous.

In 2001, the US Federal Railroad Administration (FRA) recommended minimal guidelines for the operation of remote control locomotives.

Union Pacific developed remote-control enabled locomotives, referred to as control car remote control locomotives (CCRCL). A CCRCL is a stripped-down locomotive fitted with remote control equipment. A CCRCL has no motive power and must be coupled to a standard locomotive.

Present

Modern remote control systems are now based on digital signal technology, with most using time-division multiplexing transmission to cut down on the number of cables or radio bandwidth required for integrated control.

The UK's InterCity 125 was the first passenger train to use TDM technology, introduced from 1976 to allow it to control up to eight carriages sandwiched between two Class 43 power cars.

Locotrol is a product of GE Transportation that enables distributed power sending signals from the lead locomotive to the remote units via radio control. Locotrol is installed on more than 8,500 locomotives around the world. Users of the system include BHP Iron Ore, Westrail and Aurizon in Australia.

References

References

1. "Safety: Remote Control Locomotive Operations". [[Federal Railroad Administration]].
2. "Remote Control Plant Locomotives". [[Occupational Safety & Health Administration]].
3. Luther S. Miller. (February 1999). "Locomotive remote control - A prize just out of reach". [[Railway Age]].
4. Brotherhood of Locomotive Engineers and Trainmen Auxiliary. "Remote Control Locomotives". www.bletauxiliary.net.
5. "Recommended minimal guidelines for the operation of remote control locomotives". Federal Railroad Administration.
6. Sean Graham-White. "UP CCRCL's". www.trainweb.org.
7. "Locomotive Products : Onboard Systems : LOCOTROL Distributed Power". www.getransportation.com.
8. William C. Vantuono. (April 2002). "Control this! how distributed power helps railroads handle the world's longest, heaviest trains. demonstration union train - BHP Iron Ore Australia". findarticles.com.
9. "Locotrol Workings". djukin.tripod.com.
10. "Railways in the Coal Fields of Queensland". www.austehc.unimelb.edu.au.