Text 4962, 63 rader
Skriven 2005-01-12 11:22:36 av Roy Witt (1:10/22)
   Kommentar till text 4898 av MIKE ROSS (1:167/133.0)
Ärende: Motorcycles
===================
Hello MIKE.

12 Jan 05 00:46, you wrote to me:

 MR> "Roy Witt" bravely wrote to "MIKE ROSS" (11 Jan 05  13:15:07)
 MR>  --- on the heady topic of "Motorcycles"

 MR>>  the "pump and release" technique. With ABS
 MR>> the only way to stop on smooth ice is to sit on the brakes and pray.

 RW>> I couldn't imagine why anyone would pray when they're vehicle is
 RW>> equipped with ABS. It pumps and releases the same as your manual
 RW>> method and it allows the driver to sit back and just steer without
 RW>> having to pump the brakes.

 MR> With ABS the braking distance on ice is substantially longer than
 MR> what an experienced driver can do.

I disagree with that, but you go ahead.

 MR> However, for an inexperienced driver, then ABS is certainly safer
 MR> than what he might be capable without it.

When it comes to icy roads, nobody is an experienced driver. Including
Canadians.

 MR>  In my opinion, it gives a driver a false sense of security because
 MR> the flaw is ABS is only as good as the "expert" program its computer
 MR> is executing.

Well, nothing is perfect. Not even an expert driver. Which is why there is
such a thing as ABS. In an emergency, every driver's first instinct is to
slam on the brakes to stop the car. Driver's have the same reaction on icy
or wet roads.

 MR> It certainly can't anticipate every road condition nearly as well as
 MR> an alert human can.

Human's are more prone to error than a computer program is.

 MR> For example sensor data the ABS computer doesn't recognize throws it
 MR> into an error loop and this case arises likely when it might just be
 MR> needed most.

When the brakes of a car are applied suddenly and locked up, the tires
lose traction with the road and begin to skid. Under these conditions the
rear end becomes unstable and tends to slide from side to side. As the
front brakes lock up, the front tires lose traction and steering becomes
impossible. Therefore, some wheel slip is necessary for front wheel
control.

When tires roll freely making contact with the road, ice or no, this is
known as zero slip. At 100 slip, the wheel is locked and the tire begins
to skid. Most normal braking occurs between these limits. Based on
engineering research, the maximum amount of braking force can be
transmitted in the 8% to 35% range. With this amount of wheel slip, tires
have the best coefficient of friction with the road. Controled by a
computer reading sensors, only ABS can give you this.



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