Re:Through the snow as if on rails
by lisper on Wednesday December 04, 2019 @08:39PM
(#21709213)
What I want is something like a tail-hook that I can deploy from underneath the car in an emergency situation that will just drag along the ground grabbing on to whatever it can get a grip on, whether that's snow, dirt, or asphalt. If I change my main point of contact with the supporting surface from rolling rubber to a metal spike (or something like that) I'm gonna slow down a hell of a lot faster than I would otherwise.
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Re:Through the snow as if on rails
by etrautmann on Wednesday December 04, 2019 @08:53PM
(#21709275)
I’m not seeing how this could work on most driving surfaces. On asphalt you would have to penetrate the surface, which would require extreme force, or somehow apply additional downforce to a friction device, which would reduce braking friction to the other wheels.
> you would have to penetrate the surface
No, you just have to push down hard enough to take some of the pressure off the tires. (In an extreme case you would lift the tires entirely off the ground. A nice side effect is that you would no longer need a tire jack. Hm, I am beginning to understand why car manufacturers don't implement this :-)
Huh? Taking pressure off the tires reduces traction.
Not if that pressure is moved to something pointy that digs in better than tires, or has more friction.
Re:Through the snow as if on rails
by throwaway1777 on Wednesday December 04, 2019 @10:14PM
(#21709660)
Sounds like a good way to destroy our roads.