Dragster Rear Wing

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liqu
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Dragster Rear Wing

Post by liqu »

Hi, just about to finish my Supercomp rear engine dragster (234" Spitzer) any ideas how to set up the wing? (angle)
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Re: Dragster Rear Wing

Post by liqu »

Guess what engine
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Rick!
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Re: Dragster Rear Wing

Post by Rick! »

5-7 degrees is a good starting point, depending on the cross section (typically NACA). It's mostly to make the driver comfortable and not so much for down track down force.
Any slip joints in that hardtail?
If it's truly a Super Comp car and not Super Pro, maybe a few degrees more for when the guy in the other lane comes by at 190+ mph.
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Re: Dragster Rear Wing

Post by David Redszus »

It very much depends on the airfoil shape.

Drag and lift force data is available for hundreds of NACA wing foil shapes at increasing attack angles.

Usually, an increased attack angle will increase downforce along with an increased drag penalty.
But not always. We have raced a wing on an Atlantic car where to downforce increased with angle,
but drag did not. Up to a point. It was a total surprise to the crew chief who could not believe his lying eyes.
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Re: Dragster Rear Wing

Post by Rick! »

David Redszus wrote: Tue Oct 05, 2021 11:12 am It very much depends on the airfoil shape.

Drag and lift force data is available for hundreds of NACA wing foil shapes at increasing attack angles.

Usually, an increased attack angle will increase downforce along with an increased drag penalty.
But not always. We have raced a wing on an Atlantic car where to downforce increased with angle,
but drag did not. Up to a point. It was a total surprise to the crew chief who could not believe his lying eyes.
That characteristic is known as the "Drag Bucket". At relatively small AOA changes relative to the design AOA, the drag coefficient does not change. much. The link below helps one see the bucket in the drag coefficient plots.

lift and drag coefficients of selected NACA airfoils
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