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RE: [NewMobilityCafe] Cut More Emissions, the easy way

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  • Stefan Langeveld
    Of course every car consumes more at 130 than at 90; i mentioned two different models, with different frontal area and coefficient of friction, not to mention
    Message 1 of 7 , Oct 31, 2005
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      Of course every car consumes more at 130 than at 90; i mentioned two different models, with different  frontal area and coefficient of friction, not to mention transmission losses and gear ratios.
      Loads of factors determine energy/fuel use . Take speed variation, which is very relevant. Cruise control is a useful tool ,but you can achieve efficiency with a steady foot (limited acceleration), keeping your distance, and not braking.
      Btw , video-meetings can also save a lot.
       
      Stefan Langeveld
       
       
       
       
       


      From: NewMobilityCafe@yahoogroups.com [mailto:NewMobilityCafe@yahoogroups.com] On Behalf Of Eric Bruun
      Sent: Friday, October 28, 2005 9:51 PM
      To: NewMobilityCafe@yahoogroups.com
      Subject: RE: [NewMobilityCafe] Cut More Emissions, the easy way

      Stefan

      Don't confuse how a car happens to be geared with energy efficiency. There is no possible way
      that an optimally geared car can consume more energy at 90 kph than at 130kph. Drag is the
      dominant source of resistance in this speed range, and it increases with the square of the speed. There is
      a huge difference between 810 and 1690.

      Eric Bruun



      -----Original Message-----
      From: Stefan Langeveld  <slangeveld@...>
      Sent: Oct 28, 2005 6:12 AM
      To: NewMobilityCafe@yahoogroups.com
      Subject: RE: [NewMobilityCafe] Cut More Emissions, the easy way


      I oppose such a limit.
      It ignores

      1.      Fuel consumption and emissions vary between models/engines , both could be lower for car A at 130 km/h than car B at 90.

      2.      Occupancy. You can achieve far greater reductions when 2 decide to decide to travel together.

      It's very difficult [impossible ?] to measure or limit the emissions per kilometer per person, that's why some propose a crude speed limit.
      Fortunately, ride sharing will work without new laws.

      [Stefan Langeveld ] 
        _____ 


      -----Original Message-----
      From: Stephen Plowden [mailto:stephenplowden@...]
      Sent: Thursday, October 27, 2005 1:23 AM
      To: Kyoto2020@yahoogroups.com
      Subject: Re: [Kyoto2020] Cut More Emissions, Build a Stronger EU -
      Activists

      Something I am thinking of doing once my current study is finished is to

      launch a campaign for a wordlwide maximum road speed limit of 90 km/h
      with vehicles built to match.  Would that be supportd by cafe society?

      Eric Britton wrote:


      >

      >
      > *CLIMATE
      CHANGE*:
      > Cut More Emissions, Build a Stronger EU - Activists
      >
      *Stefania** Bianchi





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