How F1 Wind Tunnels Work

[@deeznoots6241]

Wind goes in, wind goes out. Nobody can explain that

[@FerreiraSP_]

Wind goes BRRRRRRRRR

[@michelemariotti8198]

Finally we have a Ferrari engineer on the channel!

[@deeznoots6241]

@@michelemariotti8198 can confirm, as a Ferrari Engineer i make sure we get as much wind into our car as possible, that way we get more wind out to produce more speed.

[@TestarossaF110]

@@deeznoots6241 wind = energy and energy = POWAAAAAAAAAAAA!!!! So yes I understand why Ferrari need you. Good job, keep at it!

[@that.guy11]

Chickens go in, pies come out

[@Anriandor]

Here I am, thinking they just put a fan in front of their car and look how the air moves...

[@malikemad4]

Fan spin , wind go woosh

[@McPlayer8t]

I mean in simple terms, that’s exactly right.

[@guardrailhitter]

@@malikemad4 yea, science!

[@dand1585]

They stick pieces of yarn to the body with masking tape to REALLY see the air, you know?

[@SimRacingVeteran]

@@dand1585 🤣

[@vale.antoni]

2:22 Oops. You have summoned Dustin from Smarter Everyday

[@EmeraldMack992]

Destin. Or Dusty if you are Stuff Made Here.

[@vernement4752]

@@EmeraldMack992 I don't why I just knew these two parts of youtube were connected by a lot of other people

[@AuroraAce.]

@@RandomGuy-ol6wi yea, I don't even watch F1 or like it yet I watch all of chain bears videos

[@bhatkrishnakishor]

😂

[@christiancandler5988]

Interviewer: "What makes you qualified to be an aerodynamicist for our f1 team?" Me: "I've watched all of chainbears videos and read Adrian Newey's autobiography" F1 team: "you're hired!"

[@marcocarpanese5519]

As a first year student in Aero Engineering who is yet to study anything that isn't calculus, this is oddly specific.

[@sunnohh]

Said Ferrari

[@SamDixon3244]

That's literally me 🤣

[@satyris410]

Well I watched a documentary about Williams from the early 80s with Ross Brawn as their aerodynamicist as well!

[@jackn36]

Having been doing this and just applied to F1 teams I wish this were true 😂

[@Atty1997]

I discovered this channel like 2 days ago and since then I have literally been doing nothing but binge watching your videos, it's like sooo addicting

[@thesnitch7]

like, that's like, awesome, like like like

[@reisanibal1]

I know the feeling 😉

[@benevery]

relatable

[@aidenarmstrong2863]

One thing I’ve learned about this channel is that even if a topic doesn’t seem interesting, he finds a way to make it interesting by diving into it

[@engineergaming4295]

@@thesnitch7 you sound like a Californian

[@bond007rules]

Everyone else: wind tunnels Me: ooh he's got a SM58

[@ThatBeTheQuestion]

How can you tell it's an SM58 specifically? I'd think if most people are going to do voiceover work and want to pick something from Shure's offerings, it'd be an SM57B.

[@ThatBeTheQuestion]

@@lostalone9320 I didn't say SM57. I said SM57B. I didn't notice that he had a face cam on. I usually skip the ad. Wish I had an SM57, though. And a Peavy 6505+. Different use case, but that'd be killer.

[@ThomasFilbert]

@@ThatBeTheQuestion there's no such thing as an SM57b unless Google and the Shure website are lying? Maybe you mean something different all together?

[@bond007rules]

@@ThatBeTheQuestion The SM57B really doesn't exist - surely you're thinking of the SM7B as has been suggested? And yeah it's a SM58-shaped Shure mic, so there's not much else it could be. It's a durable yet high-quality mic at a good price, and I can see why he has one. I'd tell Stuart to get a SM7B for that warm radio sound, but given the high and steadily improving quality of his existing VO it may be a case of diminishing returns.

[@sbinnala14]

Wait... Why they all start with SM?

[@LatiosBlade]

Ferrari: "SOMEBODY WRITE THAT DOWN, WRITE THAT DOWN!"

[@Enzo_RJL]

its awesome to see how far you've come since the first video on aerodynamics (slipstreaming vs dirty air)

[@BastiaanNetjes]

You always seem to blow me away (no pun intended) with your animations. They always make things so clear and easy to understand. Top job!

[@Huntracony]

Knowing quite a bit about computer simulation, I highly doubt we'll get rid of wind tunnels any time soon. Fluid dynamics (air is also a fluid) are incredibly complicated to simulate, not to mention things like resonances that come along with it. Even if we have the software to accurately simulate it (which I don't think we do at the moment, though I could be wrong), it'll be quite slow and it'll have to start over for every small change you make to the setup (like changing the angle the wind comes from). So, while simulations can be quite useful, I don't think they'll be replacing wind tunnels any time soon.

[@manuelroza12]

simple: just throw some air onto those cars

[@rishi0299]

how hard can that be!

[@antonydigerlando5195]

@@rishi0299 you want the long answer 😂? Well... you have the boundary layer, flow speed, viscosity, cables, lengths, model sizes and how that affects what you’re testing, closed test sections, opened sections, jet types, fans, power... And more 💀

[@johanpacheco22]

@@antonydigerlando5195 fluid dymamics is oh so cool and oh so difficult

[@antonydigerlando5195]

@@johanpacheco22 read a textbook on some of it... it’s interested but very hard 😂

[@rishi0299]

@@antonydigerlando5195 I'm just joking around 😂

[@Echo024]

Extreme liver challenge: Drink every time he says “airflow”

[@weylinwest9505]

Liver.exe has stopped working.

[@ankit99ize]

Life.exe has stopped working

[@gamerforlife9988]

Universe.exe has stopped working

[@allenqueen]

I find wind tunnels and cfd animations fascinating to look at. Something about seeing the air move, which is generally invisible gets me excited. It's like I'm looking at something I'm not really allowed to. Rebellious.

[@mceajc]

I find it best to think about wind tunnels in this way: It is easiest to have your instruments and the thing you're interested in stationary. (Think how difficult it would be to have very precise instruments attached to a car as it is haring around a track in still air). Now your problem is having the moving air mimic stationary air, while actually moving past your instruments and the test subject. Still air doesn't move much, so you have to make sure the air interacts with itself much less than it interacts with the thing you want to measure. Wind tunnels trick the object into behaving as though it is moving fast through still air, instead of sitting still in fast air. So the big problem to solve is how to make the air behave as though it isn't moving, even though it's screaming around a loop very quickly.

[@shyasaturtle]

I really like your videos, they are simple and easy to understand and condense complex topics into simple, easy to watch videos. Thank you so much for making these videos :)

[@McPlayer8t]

I second that.

[@nols9886]

In the f1 2020 my team the one bloke is litteraly running a leaf blower on the car

[@1RustyGee]

yeah but its a branded lead blower

[@roquesales_]

Yes, but I think it's used to cool the brakes and radiators.

[@SimRacingVeteran]

@@roquesales_- wwwwwwwhooooooosh!

[@nols9886]

@Pauline Weinberger no i dont mean the track leaf blower i mean in the aero department in my team the guy uses a leaf blower to blow wind over rhe car if you dont have a good budget

[@SamDixon3244]

Same 🤣

[@darthgorthaur258]

My ex girlfriend actually did her master's in aerodynamic engineering and was aloud to use the Williams wind tunnel, she was working on a way to increase the max speed they could use rather than hit the make speed of the tunnel then extrapolating out from there because obviously they can't hit 300mh speeds with a wind tunnel...so they hit up to like 60-70 and then mathematically increase the speed to see what would happen....as such she was working on a way to make that obsolete and be able to get it up to actual race speed...she never could quite finish it before end of her course but Williams has carried on her work even to this day....as far as she's aware from talking to old friends who still worked there to recently and keeping track of the idea in mags an papers.. Edit: I haven't fully explained it very well in the post, I've just re read some bits and notice that... There is another post lower down which explains it abit more an better, she wasn't trying to allow the tunnels to run at any faster speed she was trying to find a way to reduce the need for the mathematical guessing how a part would behave at the top end because of the limits of the tunnels.

[@darko.v]

This explains why Williams have no points!!

[@ThatBeTheQuestion]

That's really cool.

[@12th.jahlil]

Thats incredible

[@narancs5]

Chainbear just said (4:05), that there is limit to how fast teams are allowed to run their windtunnels. So was your gf working on ways to break the rules ( like Ferrari with the fuelflow meter ) or did I misunderstand something?

[@mr.goodcat582]

@@narancs5 I thought only I didn’t understand that speedy speed part of the post.

[@garf117]

Video about laminar flow??? Someone call Destin from @smartereveryday.

[@auronapi]

I'm so glad I wasn't the only one who thought of Destin when he said laminar flow

[@amirsa7140]

As a project for our fluid dynamics class,i built a tiny wind tunnel,that was a very cool experience and I've learned a lot, design the wind tunnel and calculating drags,fan speed and ... Were so cool

[@mustangdoctor3834]

What gas do they use so you can see it?

[@blakedude0]

F1: the air needs to be completely undisturbed for the readings Also f1 teams: we gonna put a massive pylon in drivers seat cause why not

[@thesnitch7]

cause: a person or thing that gives rise to an action, phenomenon, or condition. BEcause: for the reason that; due to the fact that: The boy was absent BEcause he was ill.

[@Garfie489]

To be fair its the only way to attach the car securely whilst also not disturbing the vital parts of the car being tested

[@Chuckiele]

@@Garfie489 And also, that part is already inaccurate anyway as normally there would be a driver :D

[@VGOM2000]

@@thesnitch7 Stop whining, everybody understood what he meant with that.

[@thesnitch7]

@@VGOM2000 in order to 'stop' whining I would have to be 'continuing' to whine. Given my comment was days ago - I have to ask what the hell are you whining about, you insufferable whiner?

[@Thats_Mr_Random_Person_to_you]

Dunno about others but my gut suggests that wind tunnels will never be 100% phased out just because CFD is still based on 'approximations' so cannot tell the whole story alone. That is to say the CFD calculations are computationally hard. And there does come a point where the software has to stop doing the calculations and say 'yh, thats a good enough approximation' otherwise you would be running the calculations for an infinite time. And with the inherent aspect of chaos theory (small varuations to initial conditions massivly changing the output) more accurate simulations require more computation of more 'particles' etc.. etc.. I may be wrong, but one huge benefit of wind tunnels is the ability to compare the real world with the CFD models, allowing to to verify the CFD calculations and make tweaks to the CFD calculations to better match the real world model. It might be plausible that the CFD models become so good that the extremely tiny gains gained by verifying the data with the wind tunnel may not be worth the cost of doing so. But my gut tells me that in the race for 1/10th second gains, plus the F1 regulations evolving and changing to introduce challenges means its just unlikely.

[@NONOOBZ4EVR]

I know how wind tunnels work, I just love watching any new chain bear video! Great work as always

[@crackedemerald4930]

yes this comment right here officer

[@The_Bookman]

Best F1 KZbinr. Without parallel. I almost enjoy your videos more than the race, Mr Bear. Thank you for your efforts.

[@aromaj8]

Keep Your Hands Off My Closed Loop Wind Tunnel!

[@lknanml]

Thanks for the laugh. I had paused the vid at 0:39 to get a drink. Walk back in and my GF asks. What do horses and a guy with a camera in field have to do with F1 wind tunnels?.... I said where do you think the term horsepower came from? I think the smirk on my face just earned me the I have a headache tonight dear award......

[@RadeticDaniel]

Well the horsepower was actually proposed vaguely about measures of work for the "average horse" (actually a good nugget of curiosity). Not all wrong there, despite not being what this video is about xD

[@jaimemj2]

that's a great video and those are some wonderfull animations that help explaining the topic, although i think that in situation like 9:50 with those three cars, it would be easier to detect the animations i you turn down the bright level in the other two, so light guides the eye, or maybe it was just me and it didn't affect anyone else, anyway great video thanks for explaining this kind of complex stuff to mundane people like me.

[@elmurcis1]

I'm a huge fan (In wind tunnel).

[@videogamevalley7523]

.....every time I watch your channel I learn something I didnt know or understand before. thanks my g (school is never out, jus done differently)

[@Bambishatshimself]

Stuart you are very smart man , u answer all the questions in my head about F1 n u make it sound easy, I never got bored of ur material, keep it coming mate.

[@chakky533]

The amount of work and preparation in this video is highly respectable. I can't imagine what I'd do if I had to make a video to explain this.

[@SOME-RANDOM-GUY457]

Mercedes: silky air,laminar flow, wind in wind out Ferrari: "Haha the wind goes Brrrrr"

[@petouser]

Hey Chain Bear. I love your videos, but I want to propose a topic for a future video. Can you explain *graining* ? And why it occurs, while others don't have at? And how some drivers are able to drive it away? In the last race in Turkey some drivers suffered from really harsh graining, and it's really hard to fully understand it for normal people!

[@TheMrFishnDucks]

Awesome video. Very informative. Keep up the good work.

[@policeboy1288]

“PIV” 😂😂😂😂😂 I love this channel man

[@jsquared1013]

What's so funny about the abbreviation for Particle Image Velocimetry?

[@dsdy1205]

@@jsquared1013 P****** in V*******, if you've spent any time in that part of the internet

[@danielegerussi7453]

I love this amount of weekly videoos thaaanks you're awesome

[@TechDiffuse]

Your videos are always good but this one is especially great. Haven't expected that when I saw the video title! Great work. Keep it up!

[@b2_barenko803]

I know this doesnt have a lot do to with this video but I just want to tell you chainbear that you are literally helping my school work. So we have a important presentation that we gotta make about something that has with technology to do. After 2 hours of being lost on what to talk about I decided to pick F1 cars, and while it's a big thing to talk about, your videos are the best. I have ready watched your videos before, but I've been binging these videos again and they're phenomenal The way you talk about stuff makes someone actually understand it like aerodynamics and wind tunnels. TlDr: ChainBear is literally saving my grades, appreciate you man

[@ethamsnith]

1) I love you & everything you’ve done to teach me more about the intricacies of F1 2) why do they have to use 60% models, why can’t they use full scale models

[@rockingttalent3666]

Making a full scale model can be quite expensive and time consuming and if any changes are required, it is easier to do it on a smaller model. Testing is done on certain prototyping principles and laws and conditions (lot of science stuff) and basically use something similar to ratios and proportions (in layman terms)

[@ethamsnith]

@@rockingttalent3666 thank you!!

[@zequijusti]

@@rockingttalent3666 say it. non dimensional numbers have to be the same

[@rockingttalent3666]

@@zequijusti haha. Correct. I just wanted to explain in much simpler terms.

[@ASJC27]

Most teams don’t have a full scale tunnel. They are much bigger and much more expensive to run so FIA outlawed full scale completely.

[@anidiotinaracingcar]

Yes, the detailed technical videos are back!

[@mogul1]

Awesome simulation and explanation

[@Malwontae]

That was a smooth video.

[@gabor6259]

Smooth operatooooooorrrrrrrrr!

[@lewiswood6117]

CB: Here's a nice video about wind tunnels! Me: lel PIV

[@shyamalgajjar6149]

This was an extremely well made and informative video, keep them coming!!!

[@govind9402]

Intro looks great with 3d solids, shadows, negative effect and minimalist effect.

[@jaysuneakle]

This video was deep! Loved it. As usual, i learned a ton, all while realizing how much i don't know! Thanks again!

[@RaumBances]

Excellent explanation. The only detail I would add is that they move the road surface not just because of the airflow under the car but also because a rotating wheel affects the airflow differently than a static one especially at the rear of the vehicle where turbulence from the wheel impacts the performance of the diffuser and creates drag.

[@RitchieMonroe]

Thank You. Stellar explanation.

[@davec8921]

Lots of cool info there. I had no idea they were so complex. Or that they were limited in speed and to scale models.

[@LuisLuna-te4gf]

I laughed a little too hard when he said smooth and air flow is going to lose its meaning lol good shit chain bear.

[@MrBungwung]

Really great video

[@conflict6292]

Excellent vid. Cant hear lamina flow without thinking of Dustin (s.e.d). Allways good to hear Anderson get a mention, i could be wrong but was it not Gary Anderson that invented the pito tube rig ??.

[@jonstout9236]

Excellent info, thanks!

[@jerickho7795]

Had to build on of these for my extended essay, pretty fun project

[@DJDiarrhea]

This channel really doesn't need an intro

[@grannieannie1371]

So did Williams allow you to photograph their computer? That was a very smooth video Stuart. Sorry someone had to say it.

[@vinniev77]

Probably a stupid question but wouldn't it be more useful for the teams that don't expect to be out front to test in turbulent/chaotic air flow? Like obviously getting a baseline understanding for qualifying and seeing if parts work as expected is necessary but surely seeing how the car behaves and can be improved in traffic would be more useful to some.

[@otm646]

You first have to understand the dynamics of your shape in near perfect conditions. Otherwise you're throwing in a bunch of variables that you don't necessarily know how to account for.

[@bhatkrishnakishor]

Who thought of Smarter Everyday when Chain bear said laminar flow

[@manishjoshi2760]

Informative video, gr8

[@nunotpinto]

Question: Why is it better to have the flow of air as smooth as possible? When running on a track, the air doesn´t have a laminar flow or does it?

[@marshyyboyy]

Actually theres very little laminar flow in a tunnel, it's almost entirely turbulent. the trick is to get turbulent intensity as low as possible

[@ASJC27]

Exactly right. It’s never laminar in a WT, and turbulence levels are almost always higher than in free air.

[@kimi_hakim]

Hi Chainbear. Can you do a video about fuel management? Been searching all your videos to no avail.

[@omkarkokamthankar5760]

Great video Stuart! Can you also make a video about CFD & it's applications in motorsports?

[@JamesKandler]

This us really useful, cheers xx

[@aprilwest-ryan1618]

What app do you use to make you animations because I would really love to know

[@CloroxBleach-cq7tj]

2:22 *A wild Smarter Every Day Appears*

[@MrRezQ]

This video tickled my brain in all the right ways

[@kalumbabwale3729]

Awesome video

[@itsazii]

Hey, I've been wondering. Where do you get your information? Because your videos are very informative and I've just been wondering where you get information.

[@jussidjachenko9483]

Why use a wind tunnel when you can just climb a tall mountain and use the wind there?

[@andy_liga]

Cause laminar flow and air velocity control, plus the air pressure plays a serious role in aerodynamic simulation

[@charleyatkins9094]

@@andy_liga wooooooooosh

[@lcberchtold1208]

I think it is the slicks, they don’t provide you with the necessary grip to drive up a mountain and how else would you get the car up there

[@aliamr9768]

Protect this man he's a genius

[@aliamr9768]

@@andy_liga R/WOOOOOOOOOOOOSH

[@adolfoherrasti8139]

Great video as always Chain Bear! However, a question popped-up as I was watching it. How do they simulate track conditions on the wind tunnels? Because air rarely is smooth and steady on a racetrack (unless you are Hamilton)

[@210parrish]

So if the teams are upset about "dirty air" when behind other cars in corner, is there not a way to test "dirty air" in the tunnel?

[@RadeticDaniel]

Yes, they can try some variations of perturbed flow, but not the exact configuration produced by another car. To produce a valid simulation you need the correct pattern and for that you'd need to measure the flow behind every car of every team. The best you cn get are simulations of your own two cars runing close to each other and maybe some data on generic turbulance in winter testing =)

[@anirudhjilla5908]

I wish my physics teacher was atleast 10% as good as you. If so I wouldn't be watching youtube all day long with soo random pointless video. Ps: your videos are the best one's and I wait for them daily to pop up on my feed😍😭

[@egerthainla9392]

Very informative video! Can you please favourite this comment, because there is really lovely video out there by Willem Toet who worked for Sauber for many years. He shares really cool inside information which you mentioned in this video, but Toet explains how did they come up with certain methods and so on. Great video, I'd like to see more quizes though ;)

[@dyslexofficial2798]

So if the air in the wind tunnel was turbulent the cars would preform better in traffic then?

[@utetopia1620]

4:15 Why don't the arms holding the car in place disrupt the air, too?

[@ForeverDayGreen]

They probably do. But from the looks of it one arm is behind the car (and therefore not important to the readings) and one is above the cockpit, where you want uninterrupted airflow anyway (to feed air into the cooling system). So both arms are probably in positions where they can be deemed non influential on the parts of the airflow you really care about (I.e. diffuser, front wing, rear wing)

[@bmanna495]

they're symmetrical airfoils, so in the limits of friction the airflow doesn't get turbulent

[@sikckaputten]

Whenever you said "laminar flow", I got flashbacks from Admiral General Aladeen.

[@rs-flamingo]

PIV sounds awesome

[@keisuketakahasi4584]

ok... cool... but how do they develop parts from that? i expect them to look at the wind tunnel and be like "yup thats efficent" but how would they make it actually better?

[@mr.goodcat582]

They gather data from existing car, analyze it and then model something new in PC. If it works “on paper”, they make it for the wind tunnel, if it shows expected results- the part is produced for a real car.

[@RadeticDaniel]

It's a sort of tradicional advanced mathematics problem. Get a surface shape that has ideal facing area when observed from all points where wind is expected to come from in various situations. To much area and you're dragging, to little area and you have no downforce, the right amount in the wrong places and you become Williams with little downforce and lots of drag. . After that you run through computer models checking different air densities, humidity levels and temperature just to be on the safe side about the boundary layer behaviour. All that is still not considering cooling for brakes and power unit, what makes it harder yet.

[@joergssons6330]

Great video as always, but do you know if you are allowed to use two models of cars to simulate driving behind another one or do they just simulate that as well or not at all?

[@leetlebob8203]

7:40 is this an optical Illusion or is the car slowly moving back and fourth

[@marcophilhom6844]

Does it matter what type of airflow comes in to the engine Laminer disturbed or turbulent? Is one more efficient than the other.

[@kkyy8686]

What do you use to animate your videos?

[@eddiebooth9795]

of course this comes out a day after my paper on wind tunnels was due haha

[@Nickyy64]

Howdy Stuart!

[@motorsportministries7843]

hey chain bear, thank you so much for your videos. absolutely brilliant. I have a question. How can you explain the competitiveness of this season? Yes Red Bull came out a lot better this year due to the high rake being the favorite to my understanding, but recently we have seen a Red Bull that is arguably all around better than the Mercedes, even at the tracks where Mercedes were to be stronger. Also Land Norris out of nowhere is on P2. George Russell somehow qualifies P9 when His williams has sat in P17 all year. Brilliant driver but how does he go from P17-P9? This year has a lot of shakeups. I know about the flexi wing as you have made that video, but perhaps a video of just why this year is so competitive compared to the past years of stagnant racing? I mean giovinacci is P5. The Aston Martins are strong. Its very interesting... Why is this? Parts improvements? if So, what parts? Thanks

[@mhilmyfauzi4523]

Didn't expect that method to be the less invasive one

[@dom6770]

We all know the skillshare trial is not limited to 1000 people.

[@lambdaexclamationpoint]

I like how you can explain things like I’m a child, but not be patronizing

[@hoxfrey9093]

I'm watching this while procrastinating my fluid flow engineering class 😂😂

[@RadeticDaniel]

motivation goes a long way to put in those extra ours, i'd say you were studying anyway xD

[@spacecowboy3063]

I have an idea for an episode. What do they mean by "balance" and how is it adjusted? They sure do talk about it a lot.

[@roflchopter11]

6:38 somehow I never connected those dots until I watched this video

[@vernonbear]

We had a cooling problem on our Van Dieman RF88. We tied some red wool to the front suspension, ragged the car past the pits at Silverstone, took photos of it as it drove by and established that the air was being shifted up over the radiator cowlings. Wind tunnel? Pfff. We learnt from sailing telltails 😀

[@johnrich6928]

Excellent presentation, as always. I'm interested to know, given that the conditions in a race won't match those in the wind tunnel, is this a major issue?

[@LeonQuadros]

Great question. There is no way to truly get a simulation of actual race day airflow because of the unbelievably large number of data points. Moreover, no air is truly laminar, as there is bound to be disturbances and turbulences due to a varying number of factors. So teams had a choice, test your car on a racetrack and get data from that, which was both banned by the FIA and gives less data than the wind tunnel, or make the air behave predictably and understand how the car "should behave" under ideal circumstances, and get a ton of usable data. The difference in performance in the wind tunnel versus racing conditions exists, obviously, but you won't miss any major flaws in the wind tunnel that show up on race day.

[@johnrich6928]

Appreciate the response, thanks, and that makes sense, best option chosen.

[@dave6429]

Video starts at 1:05

[@22Uzbekistan]

use SponsorBlock addon

[@lcberchtold1208]

Just find out yourself everyone! Don’t let his sponsors think their money ain’t worth it!

[@kiereluurs1243]

Wow, there's a lot to it. The tunnel itself to start with.

[@ihatemegatron216]

Disturbed with wibbles and swirlies is actually pretty close. the swirlies are sometimes called eddy's if they occur directly after an obstruction.

[@thesnitch7]

where I come from Eddys are called Bruces

[@ihatemegatron216]

@@thesnitch7 that sounds considerably more intimidating.

[@ASJC27]

It doesn’t have to follow an obstruction to be called an eddy. Even free turbulence is talked about in terms of eddies.

[@MSportsEngineering]

Springs and dampers are not typically ran in rolling road wind tunnels. Load cells in the suspension don't make sense if those devices are absent. You sure about that part CB?

[@ryofurue]

I was wondering: can't FIA use CFD to restrict turbulence behind the cars? First FIA would give a CFD package to the teams. The teams then feed their CAD data into the software and have to modify their designs until the turbulence (using some measure) is less than the FIA-set threshold. Then the teams would send their final design to FIA, which would verify that the turbulence is below the threshold using the same software. FIA would reserve the right to add sensors to any of the actual cars during the race weekends to improve their CFD program and update the software once in a while. In this way, the difficulty in following the car in front would finally go away.

[@adamdickinson2894]

I heard a story that a LM team (can't remember if it was Ford in the 60s or Porsche) tracked the airflow by seeing where the dead flies were on the car. They noticed there were none on the rear wing which meant the air wasn't flowing over the wing as intended

[@philkensebben157]

My recollection is it was either testing for the Ford GT40 project or Carroll Shelby's other LeMans project, the Daytona Cobra. I know it had to do with Carroll Shelby.

[@HATECELL]

Is there a rule limiting model size and wind speed for tests, or are there practical reasons? I've been at the Sauber wind tunnel about 10 years ago and that thing is totally big enough for a full size car, and can apparently go over 300km/h, so they could just put the real car in it if they wanted to