my bike gets about 200 watt per mile harry Albuquerque, NM current bike: http://www.austinev.org/evalbum/1179 current non-bike: http://evalbum.com/1000
-------------------------------------------- On Thu, 11/12/15, EVDL Administrator via EV <ev@lists.evdl.org> wrote: Subject: Re: [EVDL] Watt-Hr Motorcycle Efficiency... To: "Electric Vehicle Discussion List" <ev@lists.evdl.org> Date: Thursday, November 12, 2015, 1:23 PM On 12 Nov 2015 at 11:59, Ing. Marco Antonio Gaxiola via EV wrote: > Considering the rule of EVs efficiency of 250Watt-hr per mile on a 2500 lbs > compact car, May it apply same in order to calculate the energy efficiency of > a prototype motorcycle? Maybe, but remember that a bike's aerodynamic qualities are significantly worse than a car's. This is because the bike's rider adds quite a bit of wind resistance. Another (possibly better) way to estimate the EV bike's energy efficiency might be to look at a similar ICE bike's fuel efficiency. Taking the efficiency difference into account, an 8kWh lithium battery, fully discharged, provides about the same range as a gallon of gasoline. So if your car got 35mpg as an ICEV, it should get around 230Wh/mi as an EV. If your motorcycle got 100mpg as an ICEV, it should use around 80 Wh/mi as an EV. Another way is to check the EV Album for similar vehicles. For example: http://evalbum.com/5125 This is a 450lb conversion bike with an 84v, 30ah (2520Wh) LiFePO4 battery. The range is listed as 40mi, so that's 63 Wh/mi. Or this one: http://evalbum.com/5128 This has a 768Wh battery and a range of 15 miles for an energy usage of 51.2 Wh/mi. However, the top speed is only 35mph, so the bikes' relatively poor aerodynamics may not play a very large role here. This bike can do 60mph: http://evalbum.com/5114 Even though it weighs only 176lb, it has a 3990 (!) Wh battery and a range of 50 miles, which works out to about 80 Wh/mi. David Roden - Akron, Ohio, USA EVDL Administrator = = = = = = = = = = = = = = = = = = = = = = = = = = = = = EVDL Information: http://www.evdl.org/help/ = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Note: mail sent to "evpost" and "etpost" addresses will not reach me. To send a private message, please obtain my email address from the webpage http://www.evdl.org/help/ . = = = = = = = = = = = = = = = = = = = = = = = = = = = = = _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at 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 Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
