On Oct 8, 4:10*pm, "Dave Plowman (News)" wrote:
In article
,
* *NT wrote:

Yes, they've dropped to the point of being useless to stop a car.
Someone somewhere must have naively believed the idea that dual
circuits brakes dont fail if one circuit leaks. I can assure you they
do.

If it were a hydraulic failure, the idea is one will work if the other
fails.

Lots of people assume so. But its not how it actually works. Dual
circuits are no more reliable than single. The advantage is the
ability to vary the relative pressures to some extent as the back end
rises up.


Of course if one has already failed...


NT