Wing with top down compensation?
https://occamsracers.com/results/ope...-and-fastback/
According to that article, open top is 2.5x less effective. So can I adjust the angle to get to my desired downforce? For example, with the gtc200. If I want the downforce created at 0 degrees. With an open top can I pitch it at 12 degrees and get close to the same downforce? I’m assuming drag would be about the same as well? |
The wing is less effective because the airflow without a top is incredibly dirty. Dirty airflow across a wing will generate lots of drag and very little downforce. Changing the AOA will add even more drag and not much additional downforce.
Get a hardtop. |
Originally Posted by Halcyon
(Post 1549937)
https://occamsracers.com/results/ope...-and-fastback/
According to that article, open top is 2.5x less effective. So can I adjust the angle to get to my desired downforce? For example, with the gtc200. If I want the downforce created at 0 degrees. With an open top can I pitch it at 12 degrees and get close to the same downforce? I’m assuming drag would be about the same as well? https://occamsracers.com/2019/05/23/...airfoil-tools/ Savington may have different data, but my testing didn’t show any increase in drag with the wing and open top, despite the turbulence. In fact the wing was .03 Cd across all tops, and I kind of wonder if the wing might have helped clean up the wake because the open top should have had mode drag. In any case, you can play with the NCrit value to simulate turbulence. It comes down to this: you need clean airflow under the wing. |
Thanks for the response guys.
I enjoy driving at the track with the top down. But I guess I’ll drag the hard top along and experiment. |
Running the hard-top instead of open-top is 100% the better option. If you didn't have a hard-top then putting the soft-top up would be the way to go.
FWIW 9LR wángs produce the same CFD results in open air as they do on our standard mounts on a NA. :party: |
Originally Posted by flier129
(Post 1550410)
Running the hard-top instead of open-top is 100% the better option. If you didn't have a hard-top then putting the soft-top open would be the way to go.
FWIW 9LR wángs produce the same CFD results in open air as they do on our standard mounts on a NA. :party: |
Originally Posted by Morello
(Post 1550447)
I find it hard to believe the soft top open (with a roll bar) is better than soft top up...
|
putting the soft-top up ***
Typo! Johnny is rubbing off on me. |
Thanks for posting this. I didn't see that data before. It's helpful to see the data from the fastback. We built ours based off trolling this forum.
Cheers, LuckyKid Team PartsBadger |
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