In article ,
wrote:
25% is only required when there's a single-circuit service brake.
Anything with dual-circuit is 16%.

16% is awful. I've experienced one that only just does that. I'd truly
hate to have brake failure in such a car.

But that's the point. With dual circuit brakes the handbrake is no longer
an emergency one.

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*Time is what keeps everything from happening at once.

Dave Plowman London SW
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