JT wrote:
Every motorists worst nightmare?Two years ago I was marshaling on an historic rally that went over Hardknott, and we were stationed at the next control. After the last competitor had passed, the "course closing car" appeared and asked if we could give two guys a lift back to Ambleside. As we headed back they described how they came to be requiring a lift:
They were tackling the eastern side of Hardknott in a Sunbeam Harrington Le Mans. About a third of the way up, just before all the hairpins there is a sudden vicious steep section (you will remember it if you've passed over there as the bit where you "lose your horizon"). Unfortunately, as they were nearing the top of this there was a loud bang from the rear of the car: their diff had failed to withstand the torque being transmitted under this extreme test, and the casing had literally exploded. So they suddenly and unexpectedly lost all drive.
This wouldn't have been so bad in itself, except that a fragment of flying diff casing happened to slice through a brake pipe. This car of course predated "dual circuit" brake hydraulics, so one cut pipe meant complete brake failure.
He grabbed for the handbrake, but of course this would struggle to hold the car on that gradient on a good day, let alone arrest it once already rolling backwards, with the linings still "cooked" from the recent descent of Wrynose.
So they shot backwards down the steepest road in England, in the dark, with no brakes and no drive. Pause if you will, dear reader, and consider that prospect for a second or two!
Anyway, after about 20 feet of "free fall" they slid off the side of the road and hit a substantial rock which finally brought them to a halt. The driver said to me that never before had he experienced such acceleration, nor such a sense of relief at driving into a rock!

OUCH!
...and I don't suppose it had head restraints either! Still, I guess it was before "whiplash" was invented
The father of a mate of mine had a Riley 2.5 RM in the early 50s and, apparently, suffered hydraulic failure on the brakes on the way down Hardknott

. It was one of those ingenious systems where they didn't quite trust hydraulics so the front brakes were hydraulic and the rears were rod actuated. Cleverer than that, the master cylinder was part of the linkage so as it bottomed out, having lost all its fluid, it jus tbecame a rigid part of the linkage and still worked the rear brakes. That said, it was then "Hobson's choice" as he had to choose between not slowing down enough or locking the rear wheels! Apparently he (and my mate's mum) nearly became statistics!
Fortunately, however, since the advent of camera enforcement, cars have become a lot safer
