04-16-2011, 06:36 PM
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#101 (permalink)
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Recreation Engineer
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Quote:
Originally Posted by aerohead
I gleaned an article about Volvo's 3CC concept coupe from the Feb.2005 Popular Science,p. 17.
This car has a roofline of generous plan-taper which Volvo credits with a 12 % drag reduction.
Since my cover has this taper and gave a 13% mpg improvement,the article helps explain the difference between Ford's 10 % straight-sided aero-shell of 1988.
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Phil, would it be possible to attach or link some pix so I can see what you are saying? 
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04-16-2011, 08:27 PM
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#102 (permalink)
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Do more with less
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Thanks for the link. That is a very impressive mileage gain. They claimed a 12% reduction in drag, I presumed that was aero drag, No?
Volvo PS article.
Quote:
Originally Posted by aerohead
I gleaned an article about Volvo's 3CC concept coupe from the Feb.2005 Popular Science,p. 17.
This car has a roofline of generous plan-taper which Volvo credits with a 12 % drag reduction.
Since my cover has this taper and gave a 13% mpg improvement,the article helps explain the difference between Ford's 10 % straight-sided aero-shell of 1988.
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04-17-2011, 12:11 AM
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#103 (permalink)
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That's a pretty nice setup there.
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04-17-2011, 02:00 AM
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#104 (permalink)
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Quote:
Originally Posted by t vago
That's a pretty nice setup there.
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I was JUST about to post a picture of that car.
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04-17-2011, 12:25 PM
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#105 (permalink)
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There's a slight hint of that taper in the later Volvo C30.
Volvo could get away with that taper on the C30 as it's only a 4 seater.
Despite that and several more extensive drag reduction measures, it only returns the same FE numbers as the sedan S40 and wagon V50, due to its shorter length.
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04-23-2011, 02:33 PM
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#106 (permalink)
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pix
Quote:
Originally Posted by KamperBob
Phil, would it be possible to attach or link some pix so I can see what you are saying? 
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Bob,I don't have the image with me,and it may be a couple of weeks before I'm back on the computer,but I'll do it asap.
Short of that,Pop Sci may have some resource online for images don't know.Or maybe GOOGLE IMAGES.
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04-23-2011, 02:35 PM
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#107 (permalink)
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Master EcoModder
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yep,aero
Quote:
Originally Posted by Varn
Thanks for the link. That is a very impressive mileage gain. They claimed a 12% reduction in drag, I presumed that was aero drag, No?
Volvo PS article.
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yes,it's a air drag reduction.
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04-23-2011, 02:39 PM
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#108 (permalink)
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Master EcoModder
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Jaray Kombinationform
Quote:
Originally Posted by t vago
That's a pretty nice setup there.
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The roofline dates to Jaray's 1922 Patent application,finally issued in 1927.It pretty much makes the roof 'vanish.'
Rumpler also used this roof on his water drop limousine circa same time period.The roof dropped the Cd of the open cabin 1921 car from 0.54,to o.28,as tested in VW's modern tunnel
Last edited by aerohead; 06-11-2011 at 04:43 PM..
Reason: add data
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05-23-2011, 09:42 PM
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#109 (permalink)
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05-23-2011, 09:52 PM
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#110 (permalink)
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Aero Deshi
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Looks great! I'm glad you resisted the urge to taper it down too much in the back leaving 10 inches or so it looks like above the tailgate. Good Job!!
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