Ferrari Mailing List: Re: Technology in cars/Stupid drivers (was Re: Some No.... Michael Schumacher)

[philville dejazzd.com (philville]

   Who didn't know that........

   Forget the wipers, I just slather my w/s with Rain X   that and 80
   mph keeps it hi and dri
   ----- Original Message -----
   From: Ken Rentiers <rentiers [at] me.com>
   Date: Thursday, December 24, 2009 4:24 pm
   Subject: Re: [Ferrari] Technology in cars/Stupid drivers (was Re: Some
   No.... Michael Schumacher)
   To: Phil Tegtmeier <philville [at] dejazzd.com>
   Cc: The FerrariList <ferrari [at] ferrarilist.com>
   > Angle of incidence = angle of reflection. An infrared beam
   > emitted from the device will bounce back to a sensor when it
   > hits the glass/air interface, except if a raindrop is there and
   > the beam then escapes. Because the index of refraction of glass
   > is very much the same as that of water the IR beam passes thru
   > the glass and is sent elsewhere by the curved raindrop surface.
   > The sensor loses its signal and the wipers are triggered.
   >
   >
   > On Dec 24, 2009, at 3:19 PM, Hans E. Hansen wrote:
   >
   > > Most GM cars do too.  I haven't touched the headlight
   > switch in many
   > > years.
   > >
   > > Interesting how the auto wipers work.  The rain hits a small
   > > grid on the W/S (often behind the rear view mirror) and an
   > > optical sensor detects distortion in the light passing thru.
   > >
   > > Hans.
   > >
   > > On Thu, Dec 24, 2009 at 12:58 PM, Ken Rentiers
   > <rentiers [at] me.com> wrote:
   > >> My 2003 sled does both those things.
   > >>
   > >> On Dec 24, 2009, at 2:48 PM, LarryT wrote:
   > >>
   > >>> Maybe they think there's automatic headlights - like Volvo
   > offers wipers
   > >>> that start when it rains?
   > >>
   > >>
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