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Originally Posted by ThePass
(Post 1178057)
I have a gurney flap like you're describing on the endplates on my car.
We have a shelf full of endplate variations that we put through testing - several with various elements/shapes along the trailing edge - before we settled on these. I intentionally made the trailing edge straight so that if one wishes they can play with attaching a gurney flap. In our testing we saw that trailing edge elements/gurneys can improve outwash and create a virtual endplate extension, further adding to peak downforce numbers, but the trade-off is more fluctuation in pressure, whereas a 2D endplate creates a more constant amount of pressure. I'm experimenting with some more radical trailing edge stuff on a new version of endplates on my car, but that gets into stuff that becomes car-specific, not something that will just bolt on to any car and work the same. I'll post some pics of that stuff as it develops though just for fun discussion material :) -Ryan |
Subscribed and in for a COT set.:party:
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Updated my response to concealer's question about wing heirarchy on page 1 as I just noticed that 949 sells the GTC-300 with miata specific mounts.
-Ryan |
Group buy is up!
https://www.miataturbo.net/group-buy...0/#post1178234 This is for all variations EXCEPT GTC-200 as we are going right into regular production with those and will have them available very soon. Updating first post with the link as well. |
Before I bite the bullet, I see there are some numbers to the increase in downforce with the use of these endplates. Just curious how these numbers are determined and perhaps you could give us some insight on the testing done with these in particular with the COT version?
Thanks! |
Of course :)
Much of the testing is pretty simple but time consuming, measuring the pressure differential between the top and bottom of the wing at various points along its width. This allowed us to not only see fairly accurate "real world" downforce numbers, but we could also map out the degradation in pressure as you moved outwards towards the ends of the wing (and observe improvements across that area as well). The one thing more important to me than " test lab" numbers though is the real-world effect on performance, and that is something we've seen across the board. That's why the 5mph difference in top speed that we consistently saw in testing on Sean's car is such an important point, as is the substantial improvement (experienced in testing both on the GTC-200 models on Sean's car and the COT models on my car) in rear grip feel and the ability to dial in more front downforce to regain balance and have a faster car overall as a result. As substantial as the benefits are on a 3D wing, good endplate design is even more important for a low-drag airfoil like the COT, where its performance relies so heavily on the airflow under the wing. Downforce is a product of high pressure on top, low pressure below - accomplished by slowing the air over the top and accellerating it below. Increase downforce by improving either of these. Some wings have aggressive curvature to dramatically slow the topside air. The COT has a very flat profile, so its performance comes primarily from the underside, which depends heavily on the endplate. To make matters worse for the 'standard' COT endplate, it has very little height below the wing due to its original low-mounted application, so an improved endplate has a substantial effect. -Ryan |
What was the speed difference in the corner leading into the front straight at ACS? How much of that 5mph was from reduced drag and how much was from carrying more speed coming onto the straight?
How much less AOA are you able to run and generate the same down force on a GTC-200? |
Originally Posted by unk577
(Post 1178498)
What was the speed difference in the corner leading into the front straight at ACS? How much of that 5mph was from reduced drag and how much was from carrying more speed coming onto the straight?
How much less AOA are you able to run and generate the same down force on a GTC-200? The answer to the second half of your question isn't going to be one perfect exact number for every car and situation. Tweaking aoa to find the balance after swapping endplates, I believe Sean pulled 2-3* out, but aoa is adjusted for different tracks, conditions, etc. so it's not a hard and fast number - sometimes more, sometimes less. Using only conservative figures from our testing combined with CFD data from APR, the increase in overall downforce by changing to our endplates is on par with the results of increasing the aoa 5 degrees, but with virtually none of the drag that comes with increasing the angle. -Ryan |
Thanks, when will you be releasing the price on the GTC-200 end plates?
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Expecting them to hit the website in 1.5 to 2 weeks tops. I'll update this thread with a link when we do and they'll be available for immediate purchase and shipping, no lead time or delays. :)
Those with wings other than the GTC-200 should check out the group buy that is currently running. No current plans to put the variants for other wings into production at this time, so this is your shot at them. -Ryan |
Just a reminder, the group buy ends at midnight tonight! We don't know when/if some of these endplate variations will be available again.
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1 Attachment(s)
Stephanie Cemo/Cemo Racing switched to our endplates on her APR GTC-500 for the Superlap Battle Finale at Buttonwillow this past weekend. Without any other major changes to the car she set a new PR by 2 seconds over her time in practice from the day before and took 2nd place in Unlimited RWD.
https://www.miataturbo.net/attachmen...ine=1416273149 -Ryan |
Wow! That must've been the most cost effective means of knocking time off of their lap- times. lol
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There were some delays due to the holidays, but our endplates for the GTC-200 are now in stock at Good-Win Racing:
Singular Motorsports GTC-200 Endplates APR recently did a design change on their 200-series wing, but we made sure that these endplates fit ALL GTC-200's. -Ryan |
How do I get the Car Of Tomorrow (COT) end plates?
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Shoot us an email. COT, GTC-300/500, GT250, Kognition, etc. are special order (takes a couple weeks to make) but I believe I have a set of COT endplates on the shelf right now so you may be in luck :)
sales@singularmotorsports.com -Ryan |
^^email sent
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Looks nice, I'll have to keep these in mind for the new build.
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Got mine in... Wing thread will come as soon as my new GTC 200 gets here.
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I have a new version of APR GTC-200 3D wing. APR increases the length of a wing foil from 59.5" to 60.5". Will this Singular Motorsports Endplates for GTC-200 still fit with new version of APR GTC-200 60.5" 3D wing?
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