08-16-2011, 10:50 PM
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#121 (permalink)
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Master EcoModder
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(click on image for latest VLC blog post)
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08-16-2011, 11:33 PM
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#122 (permalink)
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(:
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I would be interested in how much Cd goes up in yaw on "covered wheel" vehicles like that, and Aptera, etc. That pic is what the wind sees at what, 10 degrees yaw, and oftentimes the yaw is even worse than that.
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08-17-2011, 06:25 AM
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#123 (permalink)
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Master EcoModder
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Quote:
Originally Posted by Frank Lee
I would be interested in how much Cd goes up in yaw on "covered wheel" vehicles like that, and Aptera, etc. That pic is what the wind sees at what, 10 degrees yaw, and oftentimes the yaw is even worse than that.
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Looking at the model from this angle, the frontal area is as big as what a solid (i.e. filled-in) car would have had.
The IMW 7 shows you don't need this fancy lay-out to be efficient - without all the design limitations of podded wheels.
__________________
Strayed to the Dark Diesel Side
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08-17-2011, 08:47 AM
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#124 (permalink)
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Master EcoModder
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I agree that outboard wheels complicate things -- the is probably interplay between air flow around the main body and the wheel fairings. The forward most piece (the nose of the car) would likely cause the wheel fairings to "see" slightly higher pressure, and the air would be "moving" somewhat sideways in relation to the direction of travel.
I hope to see what a low drag "single volume" shape is capable of, with my open source CarBEN EV car.
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09-14-2011, 12:34 PM
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#125 (permalink)
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Some additional details on the Electric VLC:
(click on image for link) |
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09-14-2011, 10:00 PM
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#126 (permalink)
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Master EcoModder
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I have some additional details on the track test, directly from Oliver Kuttner:
Quote:
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The average of 45 mph that we did with the electric VLC is around NC Car. That is a really tight track. To get 45 average you have to go 70 on the straight. it is almost impossible to get 45 average in my Jetta TDI there, and if you do you need a new set of tires after a day.... so that [VLC] will do 310[MPGe] on the highway... all day long.
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09-19-2011, 10:39 PM
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#127 (permalink)
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09-20-2011, 10:13 AM
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#128 (permalink)
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...beats walking...
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...reminds me of a "clipped-wing" airplane (ha,ha). Wonder what its "range" is? CdA?
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09-20-2011, 12:40 PM
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#129 (permalink)
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Master EcoModder
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Yes, the aerodynamics engineer is Baranby Wainfan and he usually does aircraft.
If I remember correctly, the Cd is 0.164 by the new SAE method (0.145 by the old SAE method), and I'll get the area Of the gen 2 car anyway) when I can.
The range on the <10kWh pack is ~90 miles. If the eVLC had a Leaf-sized pack, the range would be well in excess of 200 miles; maybe 225.
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10-11-2011, 12:44 PM
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#130 (permalink)
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