hexagon789
Veteran Member
We've had a recent thread on the 3-step brake and driving techniques for that, but wondered about braking with the seven-step (Release, Initial, 2, 3, 4, 5, Full Service, Emergency) system as fitted to HSTs, Mk3 DVTs, InterCity 225s and I think also Pendolinos?
Essentially I'd be interested to know what the initial application is - I would've thought Step 4 or maybe 3. Also, how hard do you have to brake for a red when doing 125mph?
Some of the signal spacing on the ECML and WCML looks to be only about 1.7-1.8 miles from Double Yellow to Red, which you me suggests a need for Step 4 braking (6%g retardation) most of the way.
Perhaps a rather more specialised question, but these things interest and intrigue me!
Essentially I'd be interested to know what the initial application is - I would've thought Step 4 or maybe 3. Also, how hard do you have to brake for a red when doing 125mph?
Some of the signal spacing on the ECML and WCML looks to be only about 1.7-1.8 miles from Double Yellow to Red, which you me suggests a need for Step 4 braking (6%g retardation) most of the way.
Perhaps a rather more specialised question, but these things interest and intrigue me!