Sorry, meant to show this pic
On Sat, May 4, 2013 at 7:03 AM, Przemek Klosowski < przemek.klosow...@gmail.com> wrote: > On Fri, May 3, 2013 at 7:19 PM, Ben Potter <b...@bpuk.org> wrote: > > > I clearly hadn't had my morning cuppa when I sat down with that lot - > since > > the frontal area is wrong too. 0.79 is closer and gives 77% efficiency > > required for a US 200 mpg. The original would be a reasonable for a bus. > > Well, not quite: 2 m2 is a typical number for sedans, and 3m2 is a typical > minivan: > http://ecomodder.com/wiki/index.php/Vehicle_Coefficient_of_Drag_List > > The smallest production cars seems to be Porche 914 and Mazda > Miata---Miata electric conversion is apparently popular due to the > advantageous mechanical layout, and here we have another reason why it's a > smart idea. > > Having said that, it's Cd*A that counts, and not surprisingly the best CdA > numbers are from experimentals like Volkswagen Concept (.15 [m2]), Aptera > (.28) and GM EV1 (.37). Best production cars start just short of .5 (Honda > Insight , CRX), with the typical numbers between .55, and .7 > > > > aerodynamicDrag(CdA)stats-productionCars.png<https://mail.google.com/mail/u/0/undefined> > The rear is dishonourably brought up by Dodge RAM (1.7) and Mercedes > G-class (1.56) :) >
<<attachment: aerodynamicDrag(CdA)stats-productionCars.png>>
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