GB Railfreight is ordering 30 Class 99 bi-mode locomotives from Stadler, funded by Beacon Rail to replace Class 66s. The first is expected to enter service in 2025.
The Co-Co locomotives will have a maximum speed of 75mph and are powered by 25kV overhead catenary or a Stage V low emission diesel engine for non-electrified routes. Stadler says they will have a maximum tractive effort of up to 500kN: the equivalent figure for a Class 66 diesel is 409kN. Under electric operation, the locomotives offer power at rail of 6,000kW.
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https://www.modernrailways.com/artic...-bi-mode-locos
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