9.3 The two brakes must have separate actuation cables. If both brakes are to be actuated by a single hand or foot lever then both cables should be attached to the lever.
I'm strongly considering utilising hydraulic disk brakes, partially due to the pressure & displacement in the line being the primary factor for the brake force application, rather than compression/elongation & position of the cable in any mechanical system, and the self-correcting nature of the hydraulic system. If taken to the letter of the law, I'd imagine that this would require either: - Separate master cylinders for each side's brake in a two-wheeled-braking system (thereby each side is unaffected by line failure of the other), or - A splitter directly mounted to a single master cylinder (Although this means the "second cable" is attached to the lever, line loss will cause fluid loss to the other side too, but will gradually degrade the system performance).
Keen to hear your thoughts or observations as to what has been allowed at inspections. I'm most likely to implement twin front-wheel braking only. Thanks and kind regards, Brendan
mhodgertt said
Feb 26, 2016
What we have let vehicles in the NW do is the "splitter directly mounted to a single master cylinder" system. As you said this still gives you brakes for a while and so will slow and stop you. If you have the single 'cable' going out to pull/activate a 'splitter' which then activates the brakes and the single system fails then there are no brakes at all and the car is going full speed and slowly coasting to a stop a mile or so later if the track it level or down hill at all.
Brendan_Smith said
Feb 26, 2016
Thanks very much Mike!
I'm likely to still integrate a rear brake system also but would prefer this to be on a pedal mounted bias bar for front/rear adjustability, which will be very difficult to integrate if two master cylinders were to be required for just the front brakes.
I'll head down this path until otherwise advised!
Kind regards,
Brendan
Hi all,
Just hoping to clarify the below.
9.3 The two brakes must have separate actuation cables. If both brakes are to be actuated by a single hand or foot lever then both cables should be attached to the lever.
I'm strongly considering utilising hydraulic disk brakes, partially due to the pressure & displacement in the line being the primary factor for the brake force application, rather than compression/elongation & position of the cable in any mechanical system, and the self-correcting nature of the hydraulic system.
If taken to the letter of the law, I'd imagine that this would require either:
- Separate master cylinders for each side's brake in a two-wheeled-braking system (thereby each side is unaffected by line failure of the other), or
- A splitter directly mounted to a single master cylinder (Although this means the "second cable" is attached to the lever, line loss will cause fluid loss to the other side too, but will gradually degrade the system performance).
Keen to hear your thoughts or observations as to what has been allowed at inspections. I'm most likely to implement twin front-wheel braking only.
Thanks and kind regards,
Brendan
I'm likely to still integrate a rear brake system also but would prefer this to be on a pedal mounted bias bar for front/rear adjustability, which will be very difficult to integrate if two master cylinders were to be required for just the front brakes.
I'll head down this path until otherwise advised!
Kind regards,
Brendan