Test Bed Set
The APT-POP (Power-0-Power) set was a rake of three skeletal unpowered carriages used as a test bed for the suspension, tilting and braking systems used by APT units. The 'Power pumps' were only mock-ups, though similar externally to PC1 and PC2 in the APT-E unit minus cabs, and the whole set had to be hauled by a locomotive. Following the abandonment of the APT project, all three carriages were scrapped in 1985. The set was formed as follows:
- Number: 975634 - 975636 - 975635
- Identity: PC3 - Lab 8 - PC4
Read more about this topic: British Rail APT-E
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