Regarding the trick dynamics of pusher trailers, the are several pusher trailers made from front wheel drive subcompact cars and their builder reported there were no tricky dynamics in their thousands of miles of driving experience. and they also used the regenerative brake system to charge the main battery pack enroute.
*Dennis Lee Miles * *Director **E.V.T.I. Inc.* *E-Mail:* *evprofes...@evprofessor.com* <evprofes...@evprofessor.com> *Phone #* *(863) 944-9913* Dade City, Florida 33523 USA On Thu, Jul 10, 2014 at 8:28 AM, EVDL Administrator via EV < ev@lists.evdl.org> wrote: > On 9 Jul 2014 at 14:59, Dennis Miles via EV wrote: > > > just put a battery pack in the trailer and a motor on the wheel, a > > simple relay to turn the motor on and as your EV becomes discharged ... > > Push your EV with the range extender trailer and use regenerative > > braking of your EV to charge your EV Pack. > > I'm no expert, but this plan sounds kind of lossy. There are also all > kinds > of twitchy vehicle dynamics involved in pusher trailers. Check the > archives; it's been discussed here. > > IMO it's more direct and practical to use a battery or genset in the > trailer, connected via cable to the vehicle. If the aux battery matches > the > main battery in voltage and chemistry, you can just parallel it. Otherwise > you'll need some kind of DC:DC and regulation scheme, which adds to the > complexity. > > The battery trailer is a proven scheme. Team New England's Solectria Force > ran one for 3 years (1999-2002) in the Tour de Sol. I seem to recall some > controversy over where it fit into the rules because of the trailer. But > they won the range prize at least one year. > > http://imagebin.org/315432 > > Yes, that's a kid's sandbox on wheels! The shape reportedly did wonders > for > the trailer's aerodynamics. It also drew smiles from the TdS officials and > spectators. > > A battery trailer allows you to have a small, light battery for your EV's > daily mission, with easily-added optional longer range when you need it. > The obvious tradeoff is the awkward maneuvering you get with a trailer. > > 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 > For EV drag racing discussion, please use NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140710/21c29871/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)
