APT-P
| British Rail Class 370 Advanced Passenger Train–Prototype |
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|---|---|
370003 at Carlisle
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| In service | 1980-1986 |
| Manufacturer | BREL |
| Built at | Derby Works |
| Family name | APT |
| Entered service | 1979 |
| Number built |
|
| Number preserved | 7 cars |
| Formation |
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| Diagram |
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| Fleet numbers |
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| Operator(s) | InterCity |
| Depot(s) | Glasgow Shields Road |
| Line(s) served | West Coast Main Line |
| Specifications | |
| Train length | 482 ft 0 1⁄2 in (146.93 m) |
| Height | 3.5 m (11 ft 5 3⁄4 in) |
| Maximum speed |
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| Weight | 434 tonnes (427 long tons; 478 short tons) |
| Traction motors | 4 × Asea LJMA410F |
| Electric system(s) | 25 kV 50 Hz AC Overhead |
| Current collection method | Pantograph |
| UIC classification | 2'2'2'2'2'2'2'+Bo'Bo'+Bo'Bo'+2'2'2'2'2'2'2' |
| Bogies | BP17a, BT11 and BT12 |
| Braking system(s) | Air/hydrokinetic Electronic control |
| Coupling system | Automatic tightlock (M) Automatic drophead buckeye (DTS) Bar (other) |
| Multiple working | Within class only |
| Track gauge | 1,435 mm (4 ft 8 1⁄2 in) standard gauge |
British Rail's Class 370 tilting trains, also referred to as APT-P (meaning Advanced Passenger Train Prototype), were the pre-production Advanced Passenger Train units. Unlike the earlier experimental gas-turbine APT-E unit, these units were powered by 25 kV AC overhead electrification and were used on the West Coast Main Line between London Euston and Glasgow Central. The APT-P is the most powerful domestic train to have operated in Britain, the eight traction motors fitted to the two central Motor Cars giving a total output of 8,000 horsepower (6,000 kW). This enabled the train to set the UK rail speed record of 162.2 miles per hour (261.0 km/h) in December 1979, a record that stood for 23 years until an InterCity 225 set reached 162.6 miles per hour (261.7 km/h) in a test run on Stoke Bank.
The APT-P was unveiled to the public on 7 June 1978 and continued to be used for testing into 1986. Due to ongoing technical problems with these pre-production units, and a lack of cash or political will to take the project forward, the planned APT-S (Advanced Passenger Train Squadron Service) production-series units were never built, but did influence the design of the later InterCity 225 sets designed for the East Coast Main Line electrification. The influence is strongest with the Class 91 locos which took many features from the APT powercars. The technology was later sold to Fiat and used for improving their second generation Pendolino trains which have been used worldwide, including the West Coast Main Line.
Units were numbered 370001-370006 (plus two spare cars labelled 370007) and were formed as follows:
A full train was made up of two units running back-to-back, with the two motor cars adjoining. The motor cars had no seating accommodation or through-gangway, so the two halves of the train were unconnected for passengers.
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Wikipedia