In a message dated 7/24/2008 2:04:07 P.M. Eastern Daylight Time,
esierraadj@xxxxxxxxxxx writes:
meaning
that almost (72% extra) twice the
effort is required to stop a manual
braked car?
that figure is an assistance percentage..... the leverage ratio
[relation of position of pushrod to fulcrum point of the hung pedal] is slightly
less advantageous than a manual brake car- so- a power brake car with the
bellows/cannister out of service will require slightly more pedal pressure to
apply the brakes at the same rate- but---- if anyone looked at the pushrod
of the bellows/assist setup- it has a fork on the end- such that if you step on
the pedal and it does not assist, you are not physically compressing a
diaphragm, but simply pulling the opposing end of the brake pedal away from the
booster, unlike a modern thru-booster of later years....
if the brakes are exceptionally hard to apply without power assist,
something is mechanically binding in the pedal assy' the safety of the car
should not be compromised, except for a little surprise of having to push
harder, not 72% but MAYBE 10% more than a manual brake
car.
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