Energy used in driving is simple physics: Everything you put into acceleration you get back in Momentum. Everything you put into a hill, you get back as potential energy. Everything you put into braking is LOST (regen gains some back). Wind resistance goes up as the cube of speed.
So the only real control you have over energy is keeping the speed (wind resistance) down. Gas cars are actually MORE efficient at high acceleration when the throttle plate is wide open and the pumping losses are minimized. So creeping away from a traffic light does not really gain anything. BUT, if it is a typical gas car and the engine then keeps running during the coast phase, that too is 100% waste (engine running but doing nothing). When people say go "light on the accelerator" they are not talking about the rate of acceleration at all. They are talking about DON'T OVER ACCELERATE beyond what it takes to coast to the next stop without having to use the brakes. Bob, WB4APR -----Original Message----- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of John Lussmyer via EV Sent: Thursday, November 06, 2014 12:44 AM To: Electric Vehicle Discussion List Subject: [EVDL] Range vs Speed I'm not seeing much difference in power usage at different speeds. Last night, I drove 60 miles on the highway/freeway, almost entirely at 60mph. used 125AH out of my freshly charged pack. Tonight, I drove the return trip, taking almost an hour longer due to horrible slow traffic on the freeway. Often stopped or below 10mph. Same power usage. -- Tigers prowl and Dragons soar in my dreams... _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA) _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
