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Old 04-12-2020, 04:47 AM   #201 (permalink)
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The incredible trick that Porsche did to reduce cooling drag to near-zero.

No shutters. And the cooling system working at full power!

I'd never previously seen this described.

https://youtu.be/AAYqrDUxTiY

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Old 04-12-2020, 01:37 PM   #202 (permalink)
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That's pretty genius. On their first water-cooled 911.

They quantify the cooling system drag. Does that include (one wonders) the benefit to overall drag from the wheel deflectors?
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Old 04-12-2020, 05:49 PM   #203 (permalink)
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Quote:
Originally Posted by freebeard View Post
That's pretty genius. On their first water-cooled 911.

They quantify the cooling system drag. Does that include (one wonders) the benefit to overall drag from the wheel deflectors?
Yes it does.
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Old 04-14-2020, 07:14 PM   #204 (permalink)
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https://youtu.be/cOpuT10kDPw

Interesting rear aero on the latest Porsche Cayenne.
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Old 04-14-2020, 08:32 PM   #205 (permalink)
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Could you post the graphic at 1:39 as a still image? For posterity.

This is relevant to my interests, I paused the video and went out and measured my Dasher 3-door: 28. I'm hoarding some textured aluminum sheet big enough as needed, I've been thinking about a J-shaped edge that would slip over the whole hatch on three sides. I don't envision a problem with visibility.

I'd been thinking about rear-slanted 'D-pillar spoiler's. This confirms it. I think of it as a boxed cavity. Looking forward to the diffuser part.

It's radiator is next to the left front wheel. Twice as good, but half as much, air curtain?

The active spoiler might be helpful with two positions, eco and airbrake. Sort of a third brakelight semaphore. I wonder how to get that without drilling glass or metal.
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Old 04-14-2020, 08:36 PM   #206 (permalink)
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Note: 1/3rd scale model, not full-size car

Last edited by JulianEdgar; 04-14-2020 at 09:21 PM..
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Old 04-17-2020, 04:00 AM   #207 (permalink)
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On-the-fly height-adjustable suspension has enormous aerodynamic advantages for those chasing best aero outcomes.

https://youtu.be/rN5nOCsLUUw

Last edited by JulianEdgar; 04-17-2020 at 04:41 AM..
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Old 04-17-2020, 04:38 AM   #208 (permalink)
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malformed URL resolves to 'http://www.https.com//youtu.be/rN5nOCsLUUw'



edit:
I run 3 in the front, it looks better lower () but there exist speed bumps.

Why a tail-dragger instead of a rake?
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Last edited by freebeard; 04-17-2020 at 11:35 AM..
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Old 04-17-2020, 04:41 AM   #209 (permalink)
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How about this? https://youtu.be/rN5nOCsLUUw
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Old 04-17-2020, 01:03 PM   #210 (permalink)
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rear lift

Quote:
Originally Posted by JulianEdgar View Post
https://youtu.be/cOpuT10kDPw

Interesting rear aero on the latest Porsche Cayenne.
I'm guessing that,the slanted backlight is a concession to styling.Had Porsche simply extended the roof profile rearwards,achieving a traditional Kamm/Fachsenfeld truncation,that all rear lift would be cancelled.With the unitary separation line,pressure recovery would have improved on the greenhouse,yielding a higher base pressure and reduced pressure drag,and overall drag reduction.Static loading on the rear axle would probably have been just fine,even flat out on the Autobahn.

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