First Tesla Autopilot Death

[OwlHoot]

2 seconds at 60 mph is about right.

0.67seconds=18m thinking distance

56m= stopping distance is 3.0555' * 18m.

3.0555' * 0.67 = 2.0472 seonds.

No, my impression from that thread is that 2 seconds is the wait time before the handbrake even kicks in!

So you have:

* 0.67 seconds to twig that sharp braking is in order, and lift the handbrake flap or hold the button down

* 2 seconds when nothing whatever happens, besides the fact that you're rapidly approaching the overturned lorry or pile up ahead!

* The handbrake is suddenly applied, and the usual stopping time applies

and that doesn't count the possible extra time flooring the normal brake and finding it doesn't work, which may well be the reason you're using the handbrake in the first place

[vetran]

No, my impression from that thread is that 2 seconds is the wait time before the handbrake even kicks in!

Oh what a bad design

We need an EMERGENCY brake, lets wait 2 seconds for it. Must be one of Zeity's favorite ex customers.


Not Pull & twist through notches to override the safety? That would be better.

[WTFH]

Oh what a bad design

Oh Suity... have you ever worked for Tesla?

[NigelJK]

I'd love to disagree, but TBH I've never used the hand brake "flap" on my Jag, as it seems to know when to apply the handbrake.

(I _presume_ - Does putting an automatic vehicle in park automatically apply the hand brake?!)

I leave the XJ HB on auto. There's an indicator on the dash to tell you when it's applied, which seems to be when the ignition is off and key pulled out for normal stops.
All of my previous Jags have locked the Diff in 'P'. Not sure what the XJ now does but it feels the same (if you are on an incline you have a small roll in that direction).

Wasn't aware of the emergency HB, I'll check the technical manual, but did one one occasion in a Merc have to apply the manual HB in a hurry when the main brakes failed approaching traffic lights. I can tell you that added another stain to the drivers seat and there was no chance of an HB turn, this was an ancient 280SE so maybe the HB wasn't that good to start.

Just for reference the Bembo braked Jags have a separate set of pads for the HB which get actuated differently.

Apologies for the : post must need a Top Gear fix or something.