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914World.com _ 914World Garage _ What angle & downforce on rear spoiler, 6" Sheridan type,

Posted by: neo914-6 Jul 30 2006, 09:48 PM

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Posted by: Brad Roberts Jul 30 2006, 10:00 PM

There is no downforce in that "spoiler" All it does is stop lifting of the rear.

You need a wing with some kind of angle of attack before you get downforce.


B

Posted by: Andyrew Jul 30 2006, 10:28 PM

Um..

Heres some pics.

Attached Image

Attached Image

Posted by: Aaron Cox Jul 30 2006, 10:29 PM

looks so nascar!

Posted by: Andyrew Jul 30 2006, 10:32 PM

And thank you!

(you should see my wheels and 10.5in slicks on it... muhaha..)

Posted by: Andyrew Jul 30 2006, 10:38 PM

BTW. Measured... Its about 71 deg from the hood line.(ie, printed a protractor, folded it to 71 from the center mark, and placed it on the hood and spoiler and it lined perfectly)

It was about 50 deg from horizontal..

Posted by: plymouth37 Jul 30 2006, 10:59 PM

when is that crazy wing going to be done Felix? sounds cool.

Posted by: alpha434 Jul 31 2006, 12:54 AM

What was the final design going to look like? Did you decide on one sticking up from the rear like Andrews, or laying flat against the rear (disguised as bodywork, popping up from pistons at the rear,) Or a full spoiler permantly sticking up, and articulating down during braking.

Show a drawing.

Posted by: alpha434 Jul 31 2006, 01:01 AM

A big part of this is the hydraulics. It's a part of the brake sytem, so you're going to need at least one piston. Long and skinny. And you'll probly go to a larger master cylinder to handle the extra area.

This post may be more for other's benifit than Neo's.

Posted by: maf914 Jul 31 2006, 11:49 AM

Do like the Chaparrals (2C, 2D, 2E, 2F, 2G) from the 60's did. Put in an auto tranny and throw away the clutch pedal. Replace it with a wing angle control pedal. The wing runs at a high angle of attack (fail safe position) until you depress the pedal to flatten it out. This would be the proper wing position for say the Mulsanne Staight. laugh.gif

Posted by: neo914-6 Jul 31 2006, 04:03 PM

The concept is shown here http://www.914world.com/bbs2/index.php?act=ST&f=2&t=43612

I just need how much force it will see so the mechanical designer/fabricator can determine "wing" materials and strength of the hydo/elect ram(s)

Thanks Andrew, I should have brought a protractor to the BBQ but then I didn't know you had one. We have digital protractors at work!

Posted by: Andyrew Jul 31 2006, 09:07 PM

lol... I printed a picture of a protractor and measured....


Mine aint digital (although I couldnt find my real plastic one) lol

Andrew

(ps, good luck!)

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