JRiggs
10-30-2009, 10:16 PM
Porsche Panamera Dynamic Wing
"The Porsche Panamera sedan's deploying rear wing has a couple of fascinating elements: It varies its angle of attack based on speed, and on the faster Panamera Turbo, it unpacks with two extensions that slide out like a vegas dealer slinging cards."
http://i264.photobucket.com/albums/ii163/gurrmon/porsche-panamera-innovations-4.jpg
"The Panamera creates negative lift by deploying an upside down wing from its tail. But a wing also generates drag, which 'drags' down fuel economy. Porsche's solution: Generate only as much negative lift as is needed for a given speed."
http://i264.photobucket.com/albums/ii163/gurrmon/image_cd_gallery.jpg
"The Panamera's wing remains stowed just below the rear window until 56 mph. At that speed, the wing deploys on motorized struts, up and out of the low-pressure boundary layer close to the body and into the denser air a few inches above, where it can get a good bite. It starts at an attack angle of -3 degrees, or with the leading edge slightly higher (the wing is upside down, remember)."
"The Turbo's wing also starts at -3 degrees, then jumps to +10 degrees at 127 mph. At high speeds, the wing not only reduces lift but creates downforce."
<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/VrCV-9qZQVA&color1=0xb1b1b1&color2=0xcfcfcf&hl=en&feature=player_embedded&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowScriptAccess" value="always"></param><embed src="http://www.youtube.com/v/VrCV-9qZQVA&color1=0xb1b1b1&color2=0xcfcfcf&hl=en&feature=player_embedded&fs=1" type="application/x-shockwave-flash" allowfullscreen="true" allowScriptAccess="always" width="425" height="344"></embed></object>
From
December 09 Car and Driver Magazine.
Found that to be an interesting read
-enjoy-
"The Porsche Panamera sedan's deploying rear wing has a couple of fascinating elements: It varies its angle of attack based on speed, and on the faster Panamera Turbo, it unpacks with two extensions that slide out like a vegas dealer slinging cards."
http://i264.photobucket.com/albums/ii163/gurrmon/porsche-panamera-innovations-4.jpg
"The Panamera creates negative lift by deploying an upside down wing from its tail. But a wing also generates drag, which 'drags' down fuel economy. Porsche's solution: Generate only as much negative lift as is needed for a given speed."
http://i264.photobucket.com/albums/ii163/gurrmon/image_cd_gallery.jpg
"The Panamera's wing remains stowed just below the rear window until 56 mph. At that speed, the wing deploys on motorized struts, up and out of the low-pressure boundary layer close to the body and into the denser air a few inches above, where it can get a good bite. It starts at an attack angle of -3 degrees, or with the leading edge slightly higher (the wing is upside down, remember)."
"The Turbo's wing also starts at -3 degrees, then jumps to +10 degrees at 127 mph. At high speeds, the wing not only reduces lift but creates downforce."
<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/VrCV-9qZQVA&color1=0xb1b1b1&color2=0xcfcfcf&hl=en&feature=player_embedded&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowScriptAccess" value="always"></param><embed src="http://www.youtube.com/v/VrCV-9qZQVA&color1=0xb1b1b1&color2=0xcfcfcf&hl=en&feature=player_embedded&fs=1" type="application/x-shockwave-flash" allowfullscreen="true" allowScriptAccess="always" width="425" height="344"></embed></object>
From
December 09 Car and Driver Magazine.
Found that to be an interesting read
-enjoy-