25-07-2021, 08:34 AM
(This post was last modified: 25-07-2021, 09:14 AM by Bob Culver.)
That corresponds about 50%. There is a clause in the wof rules which requires vehicles to be substantially as made so a modern with soaked linings should not pass. The basic formula is v squared=2 x accel x distance which gives accel= v sqd / 2 distance. A decel of 32 f/s/s is 100% so the accel as a fraction of 32 gives the "efficency"
I recall decades ago a workmate taking his prewar Morris 12 for a wof when scrutiny was token at best.. The "skilled" tester told him if it had hydraulic brakes he would have fail it. As with most Morris it did have hydraulics! Coupled Sevens do not show well on rollers as the front axle does not move back to allow the rears to function.
With full Girling and other systems there was in the late 30s a real improvemnt in car braking generally. From cycling experience the huge contribution of a 2nd brake is very evident. On narrow metal roads with blind corners must have been exciting with 2 wheel brakes.. Local 1920s Guides state that sounding the horn was a legal requirment.
The feel of braking is very deceptive. With a heavy pedal and no dive often better than seems. Passenger in my Girling RP used to brace to the dashboard but to me wih 2 cwt on the pedal nothing seemed to be happening.
(Note my original above is editted)
I recall decades ago a workmate taking his prewar Morris 12 for a wof when scrutiny was token at best.. The "skilled" tester told him if it had hydraulic brakes he would have fail it. As with most Morris it did have hydraulics! Coupled Sevens do not show well on rollers as the front axle does not move back to allow the rears to function.
With full Girling and other systems there was in the late 30s a real improvemnt in car braking generally. From cycling experience the huge contribution of a 2nd brake is very evident. On narrow metal roads with blind corners must have been exciting with 2 wheel brakes.. Local 1920s Guides state that sounding the horn was a legal requirment.
The feel of braking is very deceptive. With a heavy pedal and no dive often better than seems. Passenger in my Girling RP used to brace to the dashboard but to me wih 2 cwt on the pedal nothing seemed to be happening.
(Note my original above is editted)