Aggressive Camber

"tromoly" (tromoly) 12/18/2015 at 16:19 • Filed to: Formula SAE, Wings, Camber

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No, not wheels, wings, the best things to have camber!

Yes, that topmost element is well past vertical. #wingswork

(before anyone asks, no I’m not involved with this car/team in any way, shape, or form)

uofime-2 > tromoly 12/18/2015 at 16:26

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Holy crap! Normally I’d think they’d been hitting the pipe when they did that design, but I know that team does some serious validation.

However, now that I think about it, our elements were nearly vertical and we used a gurney flap so we may have effectively been doing the same.

this is not matt farah's foxbodymiata > tromoly 12/18/2015 at 16:52

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How the hell does that make enough downforce to justify what seems like a metric ass ton of drag? Clearly I'm not an aerodynamicist

tromoly > uofime-2 12/18/2015 at 17:05

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The paper they wrote on the rotating reference plane / curved test section in ANSYS CFX is mind blowing, because of course you should test wings under cornering conditions because that’s why you’re building wings.

tromoly > this is not matt farah's foxbodymiata 12/18/2015 at 17:07

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My wing theory knowledge is pretty bad, so can’t help on the mechanics.

For Formula SAE the average speeds are around 40-ish mph with top speeds around 65 mph or so, aero development tends to be fine with a bit more coefficient of drag than cars built for higher speeds.

roflcopter > tromoly 12/18/2015 at 17:41

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Would you mind showing me where I can find that paper? Sounds pretty interesting.

tromoly > roflcopter 12/18/2015 at 17:49

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I can’t find the actual paper, been looking for it recently and am empty-handed. This article shows it decently enough to get an idea of what they did.

http://www.monashmotorsport.com/wp-content/upl…

roflcopter > tromoly 12/18/2015 at 18:09

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Alright, I’ll look around a bit and let you know if I find it!

tromoly > roflcopter 12/18/2015 at 18:52

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Just figured out that it had previously been posted to Scridb.com, but has been deleted sometime in the last year. If you have access to a research paper database, look for “Formula SAE Aerodynamic Analysis” by Stuart Buckingham, the paper covers the Beowulf Cluster they developed as well as the rotating reference plane.

dontbethatguy > this is not matt farah's foxbodymiata 12/18/2015 at 20:16

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At the speeds FSAE cars run, average lap speed isn’t drag limited- its downforce limited. I ran a bunch of optimumlap simulations to validate this and the numbers back it up. I’d post the findings but my desktop is at school and I am home for break. If you’re interested I can post them when i get back to school. Also, assuming the flow is attached at the top of the wing (where it is above vertical) the drag would be less than what you would intuitively believe.