British Rail Class 18

The British Rail Class 18 is a class of hybrid locomotives designed and built by the British railway locomotive manufacturer Clayton Equipment Company in Burton upon Trent, Staffordshire. It has also been referred to as the CBD90 Hybrid+ by Clayton and private railway customers.^[3]

British Rail Class 18
Type and origin Power type Diesel-electric, with battery Builder Clayton Equipment Company Model CBD90 Hybrid+
Specifications Configuration: ​  • UIC Bo'Bo'  • Commonwealth Bo-Bo Gauge 1,435 mm (4 ft 8+1⁄2 in) standard gauge Loco weight 90 tonnes (99 tons) Prime mover JCB DIESELMAX 430^[1] Engine type 4-stroke turbo-diesel^[2] Displacement 2,978 mL (181.7 cu in) Cylinders 4
Performance figures Maximum speed 20 km/h (12 mph) Power output 416 kW (558 hp) Tractive effort: ​  • Starting 303 kN (68,000 lbf)

The Class 18 was first revealed as the CBD90 during mid-2019; initial customers were typically operators of private railways, such as steelworks and nuclear power plants. In May 2020, the type was ordered by the rolling stock leasing company Beacon Rail, it has been envisioned as a successor to the 1950s era Class 08 and Class 09 shunters. The Class 18 is primarily battery-powered, being recharged either via track-side mains power supplies, regenerative braking, or its onboard diesel generator. A three-month trial using the first example of the type was conducted by the train operator GB Railfreight during early 2022.

Details

During July 2019, British locomotive manufacturer Clayton Equipment Company revealed its development of a new battery-diesel shunting locomotive, the CBD90 Hybrid+.^[3] The company stated that its hybrid technology yielded several benefits, such as significant reductions in fuel consumption and emissions, around-the-clock availability, lower maintenance costs; furthermore, the locomotives' design made them suitable for working underground, such as in mines or other enclosed spaces. It was claimed that the manufacturing, testing and commissioning processes took a little over 24 weeks.^[3] Initial orders for the type came from multiple private operators; British steel manufacturer Tata Steel opted for an initial fleet of five CBD90s, and subsequently placed follow on orders for additional units. Another early customer was the Nuclear Decommissioning Authority's Sellafield subsidiary.^[4][5]

During May 2020, it was announced that the rolling stock leasing company Beacon Rail had placed an order with Clayton for the supply of fifteen CBD90 locomotives.^[6][7] The order had been reportedly made on a speculative basis, with no pre-arranged customer lined up to operate it at the time, as Beacon saw value in having such a locomotive in its portfolio regardless.^[8] The deal included options for further examples of the type. According to British rail freight journalist Simon Walton, at the time of the order, demand for hybrid locomotives was booming, with Clayton having reached a three-year waiting list.^[9]

These locomotives were assigned the Class 18 designation under TOPS, this selection was the next in sequence from the Class 17 Type 1 locomotives, which had also been produced by Clayton between 1962 and 1965.^[10] Beacon reportedly plans to offer the Class 18 as a replacement for Class 08 and Class 09 shunters, which are commonly used in private yards and sidings, all of which were at least 58 years old at the time of the Clayton order being placed.^[11] Company officials have been keen to emphasis the Class 18's environmental credentials, particularly its capacity for emission-free running, in comparison to legacy counterparts.^[12][13]

The Class 18 locomotive features a modular design and is primarily powered by 524 kWh lead–acid batteries, the latter are reportedly rated for a lifespan of seven to eight years and are easily replaceable.^[8][3] These batteries can be charged via a mains power supply, as well as through regenerative braking.^[13] Additionally, to increase its running time, the Class 18 also has an onboard 55 kW (74 hp) diesel generator, which is domestically manufactured by JCB Power Systems and is compliant with EU Stage V emissions regulations. The DC motors used require an unusually high operating voltage of 564V.^[3] In a standard configuration, it can reach a maximum speed of 12 miles per hour (20 km/h) and weighs roughly 90 tonnes (99 tons). Support for the Class 18 will be provided by Power Torque Engineering of Coventry.^[14] In addition to Britain's railways, the Class 18 has been homologated as to enable its operation across most of continental Europe.^[7]

On 1 February 2022, the first Class 18 locomotive, numbered 18001, was delivered to Whitemoor marshalling yards to begin a three-month trial with GB Railfreight, making the firm the type's first mainline operator.^[13][12] The locomotive will be primarily used in the shunting role. A follow-on trial, using 18002, will also be conducted at the Port of Felixstowe.^[8] David Golding, GB Railfreight's Asset Director, stated of the type: "The Class 18 hybrid+ shunting locomotive has the power to play a key role in the decarbonisation of our future fleet".^[13][12]

References

1. Norman, Helen (25 November 2021). "Clayton Equipment to use JCB Power Systems' eco engines for new fleet of rail haulage locomotives". Electric & Hybrid Rail Technology. Mark Allen Business Ltd. Retrieved 9 February 2022.
2. Engine Specification Sheet: 430 DIESELMAX Stage V 55kW (74hp) Base (PDF). JCB Power Systems. 12 June 2019. Retrieved 9 February 2022.
3. Burroughs, David (22 July 2019). "Clayton Equipment designs new battery hybrid locomotive". railjournal.com.
4. Moggridge, Matthew (26 August 2021). "A further two Hybrid+™ CBD90 locomotives for Tata Steel UK". steeltimesint.com.
5. Smith, Kevin (3 March 2020). "Sellafield orders hybrid locomotives". railjournal.com.
6. "Clayton hybrid locos to become Class 18". The Railway Magazine. Mortons of Horncastle Ltd (March 2021): 83. Retrieved 9 February 2022.
7. "Clayton - CBD90". Beacon Rail. Beacon Rail Lux Holdings S.à r.l. Retrieved 4 March 2021.
8. Clinnick, Richard (5 February 2022). "GB Railfreight begins testing battery powered shunting locomotive". railjournal.com.
9. "UK Clayton shunts into electric future with Beacon". railfreight.com. 27 May 2020.
10. Bickerdyke, Paul, ed. (April 2021). "Clayton to build Class 18". Rail Express. No. 299. Horncastle: Mortons Media. p. 9. ISSN 1362-234X.
11. Pritchard, Robert, ed. (April 2021). "Clayton Class 18s primed to replace ageing 08s". Today's Railways UK. No. 230. Sheffield: Platform 5 Publishing. p. 64. ISSN 1475-9713.
12. "GB Railfreight boosts sustainability by trialling new battery powered locomotive". Rail Engineer. 4 February 2022. Retrieved 9 February 2022.
13. Holden, Michael (3 February 2022). "GB Railfreight takes delivery of Class 18 locomotive ahead of trials". railadvent.co.uk.
14. "JCB supplies Clayton Equipment with engines". World of Railways. Warners Group Publications Plc. 25 November 2021. Retrieved 9 February 2022.