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evnow
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Re: Concept Good. Giant Fish Design Bad.

Tue May 11, 2010 2:39 pm

Bicster wrote:Nissan has stated that they sacrificed Cd in the Leaf in order to make the car as functional and comfortable as possible. Seems fair to me.
True - but I'd guess it needs to be better than Versa, which was not designed for better cd (I guess). I mean, whats the point of the huge headlights, smooth underbelly etc if the cd is no better than an average sedan.
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garygid
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Re: Concept Good. Giant Fish Design Bad.

Tue May 11, 2010 2:47 pm

I suspect that the "reported" Leaf Cd figure was just conjecture.
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LeafHopper
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Re: Concept Good. Giant Fish Design Bad.

Tue May 11, 2010 3:31 pm

It was designed in a wind tunnel. So Cd was very important to the designers. The only compromise was the roof line did not tail off as quickly as required to reduce drag. The Leaf designers told me that they needed the rear headroom to make it comfortable.

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evnow
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Re: Concept Good. Giant Fish Design Bad.

Tue May 11, 2010 3:54 pm

LeafHopper wrote:It was designed in a wind tunnel. So Cd was very important to the designers. The only compromise was the roof line did not tail off as quickly as required to reduce drag. The Leaf designers told me that they needed the rear headroom to make it comfortable.
Yes, you can see the result in the prius/leaf size comparison diagrams. Leaf has better backseat headroom.
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LeafHopper
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Re: Concept Good. Giant Fish Design Bad.

Tue May 11, 2010 4:03 pm

My aerodynamic design:
Image

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sjfotos
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Re: Concept Good. Giant Fish Design Bad.

Tue May 11, 2010 4:12 pm

It's, uh, very 'green'......
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garygid
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Re: Concept Good. Giant Fish Design Bad.

Wed May 12, 2010 7:44 am

I think the Leaf has a higher rear roofline to give "better" headroom, needed because the rear passenger seats are considerably higher.

For example numbers only, if the roof is 1 inch higher and the seats 2 inches higher, the resulting headroom would be 1 inch LESS.
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johnr
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Re: Concept Good. Giant Fish Design Bad.

Thu May 20, 2010 10:18 pm

Remember I said the Leaf has a drag coefficient of 0.29? That fact is straight from Nissan. Check out this interview with Nissan's Mark Perry (the relevant statement is at 10:30, but the whole clip is worth watching if you haven't yet) - http://www.youtube.com/watch?v=pVwtwhvmK0I
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