Why not see what it would take to have auto speedometers calibrated in both km/h and m/s with m/s as the secondary unit scale. A 0-220 km/h scale would be 0-60 m/s. Every 5 m/s would correspond to 18 km/h.
Jerry ________________________________ From: "[email protected]" <[email protected]> To: U.S. Metric Association <[email protected]> Sent: Sunday, March 15, 2009 11:56:31 AM Subject: [USMA:43888] Re: wind velocity Mark, Just as you do now, I have long advocated the SI unit of speed, m/s, for wind speed as well as for vehicle speed, for reasons of safety and metrication. Unfortunately, it is necessary to cement m/s tick markers on an analog speedometer, and no recourse for digital displays, until manufacturers provide a m/s option. Is m/s an option already in *any* vehicle instrument cluster? Gene. ---- Original message ---- >Date: Sun, 15 Mar 2009 04:04:24 -0800 >From: Mark Simon <[email protected]> >Subject: [USMA:43871] wind velocity >To: "U.S. Metric Association" <[email protected]> > > >The weather report predicts there will be a west wind with velocity of >28 km/h. I am going to ride my bicycle about 18 km towards the west >today. I cannot visualize 28 km/h, but I can visualize 7.8 m/s. This >means to me that I will get a better workout, going to my destination, >and should have an easier ride home. Would somebody please explain the >logic of measuring velocity in km/h? I do not understand why this is >done. I live in Southern California, and traffic is unpredictable >here. When I drive, I am only concerned with safety, and leave >additional time to get to my destination. If were are going to convert >to the metric system in the United States, why not consider using m/s >as the basic unit? I am usually only concerned with my velocity when >the traffic light turns yellow in front of me, and I have to make a >decision whether to decelerate or continue driving. If my velocity is >measured in m/s, that would make calculations simpler. In Europe, with >its denser populations, does measuring velocity in km/h work well in >calculations? I wager that highways are engineered using m/s >calculations. >Is it possible to get a velocimeter for a bicycle that measures in m/s? >
