I have the same experience that slow traffic reduces consumption - IF you still drive as smooth as possible. When the freeway is stop-n-go where one moment everyone accelerated to 50+ MPH and the next moment slams on their brakes for a full stop, then the driving is similar to through-town driving with all the traffic lights, people pulling out and such and consumption is equal to constant freeway speed. I try to maintain as constant and low speed as acceptable (it helps that I have an old Ranger truck) so doing a constant 55 MPH in the right lane brings me where I need to go with less than a minute difference compared to trying to do 65+ but the difference in consumption is huge.
Cor van de Water Chief Scientist Proxim Wireless Corporation http://www.proxim.com Email: [email protected] Private: http://www.cvandewater.info Skype: cor_van_de_water Tel: +1 408 383 7626 -----Original Message----- From: EV [mailto:[email protected]] On Behalf Of Peter Gabrielsson via EV Sent: Thursday, November 06, 2014 10:24 AM To: John Lussmyer; Electric Vehicle Discussion List Subject: Re: [EVDL] Range vs Speed There's definitely a huge reduction in consumption when I drive at a steady ~30-40mph in traffic compared to 65mph+. Some days, when the charger fails me, I pray for traffic so I can make it home. Surface streets with all the stop signs and lights however don't reduce my consumption nearly as much. My car is the reciprocal of yours but the physics remain the same. Of course, if you have very high tear loads then the longer run time will cut into any reduction in miles per kWh. Do you run 4wd? A miss-match in tire size could cause high losses. On Thu, Nov 6, 2014 at 9:38 AM, John Lussmyer via EV <[email protected]> wrote: > I should have mentioned, this is with my electric F-250. > Aerodynamics of a brick. > I was REALLY expecting the much higher aero losses at high speed to make a > measureable difference. > > On Wed Nov 05 21:43:42 PST 2014 [email protected] said: > >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. > > > -- > > Worlds only All Electric F-250 truck! > http://john.casadelgato.com/Electric-Vehicles/1995-Ford-F-250 > _______________________________________________ > 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) > > -- www.electric-lemon.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20141106/7bb5 a542/attachment.htm> _______________________________________________ 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)
