R4970 InterCity APT-U Ex-TS Development Vehicle BR Sc48204/977527 Class_Class-44 IV and one for PR

IV and one for PR Mk

pull out the PCB

11 function outputs (9 powered and 2 logic level)

A number of similar signal box designs were still to be found around the rail network until quite recently

This allows easy matching to layout needs

R4970 InterCity APT-U Ex-TS Development Vehicle BR Sc48204/977527 Class_Class-44 IV and one for PRIn mid 1984, TS Sc48204 was withdrawn from Set 370 004 and was sent to the Engineering Development Unit (EDU) at Derby RTC for conversion to an APT U test vehicle, with extensive rebuilding of the underframe being undertaken in order to incorporate tilting double bogies based on the BT12 units. Following the completion of the vehicle some static testing was undertaken at Derby, as well as dynamic testing on the West Coast Mainline in an APT formation,