13-02-2019, 08:08 PM
(This post was last modified: 13-02-2019, 08:17 PM by Bob Culver.)
Because of the high pedal pressure and lack of body dive Seven brakes can appear less effective than actually are. Road test of coupled models prior the Girling brakes of later Ruby were generally dismal; about 50%, some not even that, and with handbrake assistance! Many tests discreetly omitted measurements. Much better random figures appear in the Companion and later places. Present owners claim wheel locking in the dry with current linings specifically intended for the car. This indicates much better than 50% (100% is 30 ft, 50% is 60ft) . Moderns achieve 100% (and better)
50% braking from low speed, supposedly laden, is the legal minimum here, presumably an international standard. (Applies to those 50 ton trucks which tailgate at 100 kph!)
Curiously, older automotive books considered more than 80% as undesirable as promotes skidding! More than 50% was considered dangerous for buses with standing passengers. The later Ruby with semi Girling acheived around 75% in tests, typical of cars of the time.
Posts “Brakes, Whats Normal “24.1.19 and brake “Shoe Lining Materials” 2.11.18 may be of interest, and a myriad others.
36 ft is 84%!. Whoever claimed that as normal acheiveble was guilty of consumer deception.
50% braking from low speed, supposedly laden, is the legal minimum here, presumably an international standard. (Applies to those 50 ton trucks which tailgate at 100 kph!)
Curiously, older automotive books considered more than 80% as undesirable as promotes skidding! More than 50% was considered dangerous for buses with standing passengers. The later Ruby with semi Girling acheived around 75% in tests, typical of cars of the time.
Posts “Brakes, Whats Normal “24.1.19 and brake “Shoe Lining Materials” 2.11.18 may be of interest, and a myriad others.
36 ft is 84%!. Whoever claimed that as normal acheiveble was guilty of consumer deception.