skidding on black ice

   / skidding on black ice #41  
The real trick on a black ice skid is to initiate a 360 spin and be able to pull out at the right time!:thumbsup:
 
   / skidding on black ice #42  
The real trick on a black ice skid is to initiate a 360 spin and be able to pull out at the right time!:thumbsup:
You know when you are from Nova Scotia when....
 
   / skidding on black ice #43  
Thread is about " Black Ice " I doubt anyone north of Mason Dixen line even truly know what it is. Only happens about evey 5 or 7 years. ABS, 4 by 4
Lockers front and rear. None of that will help in true black ice. IMO

So by your statement, you assume that 'black ice' doesn't happen up here? IMHO I think you are sadly mistaken. It happens a lot more than you think.
 
   / skidding on black ice
  • Thread Starter
#44  
yeah, you guys are snowed in so much up there you have plenty of time to watch Bullitt, Dukes of Hazzard or Gone in 30 seconds, and
have time to practice your style...:D
 
   / skidding on black ice #45  
yeah, you guys are snowed in so much up there you have plenty of time to watch Bullitt, Dukes of Hazzard or Gone in 30 seconds, and
have time to practice your style...:D

No TV for me. 25" of snow this winter , another inch tonite and two tomorrow. Total for the winter 28". That sucks! I drove down to the big smoke (Toronto) yesterday morning on half frozen wet roads (not quite black ice, but not far from it). coming back up the snow was melting and running across the otherwise dry roads, making puddles and wet spots that if not addressed at nightfall would make for some interesting driving.
 
   / skidding on black ice #47  
No TV for me. 25" of snow this winter , another inch tonite and two tomorrow. Total for the winter 28". That sucks! I drove down to the big smoke (Toronto) yesterday morning on half frozen wet roads (not quite black ice, but not far from it). coming back up the snow was melting and running across the otherwise dry roads, making puddles and wet spots that if not addressed at nightfall would make for some interesting driving.

We've had 65" here of the white stuff in Indianapolis this year. About 12" more I would guess where I live 45 minutes North East.

Chris
 
   / skidding on black ice #49  
It looks like the newest vehicle in that test was a 1995. I wonder if ABS has come further since then? I'm enjoying this discussion, since I don't personally have a clue if this is true, but have always assumed ABS would be better on any type surface.
It seems it could be, but that would require that only skidding wheels be pulsed. If one wheel skids and you lose braking duty cycle on all wheels the stop is likely to take longer. I dont know whether pulsing is done individually on all systems. I do know that my current abs Subaru does not stop as well as its non abs predecessor. Its a problem on gravel and in snow and rain.
larry
 
   / skidding on black ice #50  
I take issue with these two directives:

1. Never touch the brakes!
2. Let off the throttle!

Firstly, there is pretty rarely NO traction whatsoever. Of course it's difficult to know exactly what miniscule amount of braking would work on whatever slick surface you just drove onto, but if your tires are still rolling straight ahead, the answer is "some."

Firstly Part B, if you're skidding on something with some small amount of friction, it may happen that your trajectory vector angle changes. This means you may be either going to hit that big tree or you may skid past it on the left. If you judge you cannot stop in time, but your current trajectory puts you on a path that doesn't hit the tree, pin the brakes to the floor now. This will help reduce the probability that your trajectory will change to one that intersects with the tree's location.

Secondly, you are more likely to retain or recover traction if your drive tires are spinning at the same speed they were before. Taking your foot off the throttle, most especially if you have a manual transmission, does not achieve that. Go by rpms/sound of the engine. As you transition from traction to lack of traction, use that amount of throttle that keeps your engine speed (and therefor your drive tire speed) consistent. The exact amount of throttle needed may vary widely depending on conditions, and may be hard to achieve without icy-parking-lot practice, but if you can do it it's better than just jumping to no throttle at all.

xtn
 

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