Seeing a few questions in here about speed sensitivity, downforce definitely does vary as the square of the speed (L = 1/2*density*velocity^2*coefficient of lift*area), however what I am more talking about is changes in flow separation and the coefficients of lift and drag varying with speed. Thanks for watching!

I would live to see a super in-depth look at the bargeboard area of an f1 car and how all the various devises work and what they're used for

Welcome back to the first video of regular scheduled programming since my return! Hope you guys enjoy it!

“Wait it’s all rice?” “Always has been”

Could you do like a "CFD simulation for beginners" or something like that?

Could you do a video on the subject of wheel arch vents: their appropriate time and place in race cars, and how they work? Also, the new Lotus Evija has some really interesting exterior design choices which could make for an interesting video.

That last one makes quite a bit of sense. Because on aircraft, the multi-element flaps act as a single element when retracted and only become multiple elements when extended past a certain point. The goal of the flaps is to maximize lift at low speeds. So multi-element wings should really only be used at tracks where the top speeds are relatively low. Otherwise, the time gained in the corners will be negated by the greatly reduced top speed. I would like an in-depth explanation on how the slip ratio of the tire works.

Could you do a video about the flow field and vortices around a modern F1 car, particularly how vortices are used to energise the leading edge of the floor and also how they are used to seal the underfloor?

I just found your channel and it is great so far! I'm glad you are returning! Can't wait to see more!

I would be very very grateful if the next video teach us about building a proper diffuser, step by step. I love your videos, thanks for sharing your experience. 🏎️🏁

Hey! I didn’t realise you’re back! You’re videos were the best and most in-depth, I was struggling to find good information anywhere else.

Hey Kyle! Thanks so much for all the videos! I've learned so much and I got interested enough to get a couple books on car aeroydamics! My favorite so far is probably Competition Car Aerodynamics. That book helped clarify details on a lot of things for me and gave kinda general numbers on results related to a couple topics you covered. I've also tried finding some studies myself on things I was wondering about, but most of them are behind paywalls... One topic in particular I was wondering about is having windows down, and especially what can be done about it. Pretty much all track day groups and club level racing, at least in the US, requires the front windows to be down. From what I've been able to find there is benefit to venting the cabin. Would you maybe be able to discuss this? I found the abstract from a study saying that having windows open vs running air conditioning is more efficient until about 60 mph and then as speeds increase it get's increasingly worse. And an air conditioner takes about 4-5 HP to run! So it seems to me like there are potentially fairly big benefits. Especially for someone like me who primarily goes to 'horsepower' tracks where average lap speeds are at 70-80 mph even with a 2900 pound 200ish hp car on street tires. A couple things I've found so far: A decent amount of (front engine) sportscars in various GT series, from the Aston martin DBR9, to Ginnetta G50z, to the M3 GTR (most relevant to me haha), and even up to today with the lexus RC F have holes at the bottom of the rear windshield. In their cases (I assume) it's pretty much just to vent air they purposely let in to help keep the driver a bit cooler. But that does kinda prove to me that that is a 'good' place to vent air out. I had seen people in various forums claiming that it wouldn't work, and that air could even come in through there. But that area is typically going to be a relatively low pressure zone from my understanding so that doesn't really make sense. I've even read people saying some spec miata racers were being caught / penalized for leaving a gap at the bottom of their hardtop. Nascar teams were running NACA ducts backwards in their rear side windows to help evacuate air out of the drivers cabin until it was banned. I've read that the NACA duct isn't necessarily the best duct design as a vent like this, but it was good enough to be beneficial for them... Not really sure of what else to do other than limit window opening size as much as rules allow. Maybe use deflectors? Seems like that could very easily hurt more than it helps, though. At least on modern NASCAR it looks to me like the B pillar is sloped kind of as a deflector. Or at least in a way that definitely doesn't draw air into the car. I'm sure you've got a ton of video ideas already, but I think this could maybe be a good one? It would certainly be beneficial to pretty much every club racer in the US!

Sooooo glad that you’re back!! Great video! Could you make an aerodynamic analysis of the Bugatti Bolide? Would love to see your take on that!

Just happy to see you back on UKposts! Thank you for the content.

Jeez. I just watched one of your earlier videos. You have evolved steve buscemi's eyes. Working at mercedes drained the life out of you. That said, awesome to have you back.

Great stuff as always. Glad some of the stuff you did for me made an appearance!

Happy to have you back! I would love some videos on intro to common perhaps open source CFD software

Hi Kyle ! Would love to hear you talk more about designing for front downforce in a typical time attack car, specifically the front diffuser shapes and ride height affects on them , these are rarely discussed elsewhere

Glad you return here!!!! I would love tou see stuff like diy aero kit tutorial, or some cfd visualize RPOS vs CONS btw what about courses?

Glad to have the best car engineering and race prep channel getting new videos!

Really fascinating watching as a driver and learning more about the cast intricacies of aerodynamics, thanks for the lesson!

Kyle im so glad i found you. What amazing content!

First time seeing your video and I really like it! Being both a gear head with some engineering background and a race car driver this look into engineering is fascinating.

Thank you so much! Unquestionably, one of the best, most informative channels out there. Well Done.

I would love a video on exhaust blown diffusers, and other activitie flow control techniques.

about time!!!! good to have you back

I love how none of these things that I knew already, and I'm an aero enthusiast.

So glad you're back. I haven't gone through your whole library yet, but if you haven't already done so, I'd like to know more about the aerodynamics of brake ducting for cooling in Production Cars. i.e. The impact of turbulence or wheel arch pressure on cooling ducts that originate at the front of a car. Thanks!

Great to see you making videos again.

I'm new to your stream and enjoying learning through the videos. Thanks. My suggestion for a possible future subject is to expand on the effects of fender top vents on LMP/DPi. In particular, I was watching the in-car cameras of the DPi cars at Daytona. From inside the car, you could see that the combination of high downforce at speed and the banking, had the cars at full bump with the top of the tire seeming to be above the top of the fender. I would be curious to understand how airflow on the top of the tire would affect local downforce, drag, and down stream flow. Thanks again. Jac

I am so F'n happy you are making videos again!!

Really good video, particularly the rear diffuser size question, look forward to chatting next year re the C3 corvette next year Kyle, tks, Jon 🏴󠁧󠁢󠁳󠁣󠁴󠁿

Great to have you back !

Very clarifying :) As a video suggestion I'd be interested in your take on DPi cars especially the Acura. As design references to the road vehicles are more or less desired there are many different takes on modifying the aerodynamic package and I'm wondering what you could read of the designs from a performance perspective.

Hello! I've being a huge fan of your post ever before the hiatus, so I'd like to suggest a topic for a future video covering the aero of the P1 class prototypes from Endurance Brasil. This is an endurance racing series where aero has a level of design degree of freedom similar to that of Time Attack or Pikes Peak cars, allowing teams to implement features like DRS (without limitations on use), underbody aerodynamics and many interesting solutions that are mostly forbidden everywhere else. Cars in this series are mainly spaceframe built in Brazil, like the Metalmoro AJR, Sigma P1 and DTR01, but there are also a couple modified Ginetta G58s, that went through a lot of mechanical and aero updates (DRS included), with more cars expected to join the grid in the near future.

This channel is GOLD!! Keep bringing this bombs of aero knowledge! 💪💪

Heyyyyy your back!!!!! Awesome I love your videos

Very informative and straight to the point! Aerodynamic is one of those fields that people think they understand but actually don't.

Love your information. Any chance of a circle track, dirt, aero video. Such as sprint car, late-model, modified?

Really enjoyed that episode! More myth busters please.

Just found your channel and I’m really enjoying it! I’d like to see more of how some of these technologies apply to flight if that is something you can comment on, I think that there is a adverse correlation in how racing cars leverage wings and how a flying vehicle your benefit from that, considering lower Re from the larger camber of flying vehicles. Consider Cars look to see if they can go faster on corner then shed the drag to go faster, where a flying device is trying to transition to as slow as possible to transition for flight (land) then like the cars shed as much drag to go faster. I’m curious to see how you would leverage a multi element wing in the Re range of 2M to 4 M Re range. It’ll still enjoy your videos irregardless if you consider this :)

I want to see a video where you go over the aero on famous race cars from the past and talk about what we have learned since. I remember a video you did where you did something similar at a hill climb event and it was fascinating.

Great Videos Kyle ! Could you comment on the new F1 2022 cars regarding aerodynamics? I rewatched your video "How Do You Fix Overtaking Aerodynamics in Formula 1? 6 Potential Solutions" ... and it looked like F1 was watching your video as well and to some extend, they changed the rules based on your video .

I learned so much from this, as a car guy with a technical car education! Thank you!

So good to have you back, Kyle. ✌🙋🏻‍♂️🏁

It's always great to learn new things about aerodynamics from you

I'm so happy you are back

Great videos🙌. Could you teach us some Mathematical formulas, like theoretical top speed,....? And how to work with CFD Fluid Simulation.🙏

im glad your back

Awesome video! Can you make a video of the aerodynamics of rims? Especially about what is the best for brake cooling or ventilation drag and how the perfect rim for efficiency would look like. Does it make sense to apply a wheel cap for aerodynamic purposes? I am currently writing a thesis about this topic and it would be perfect!

@Kyle.Engineers I'd really appreciate if you could do something for us saloon car club racers , some pointers and basics of making effective aero, and maybe some simple ways to confirm things are working as optimally as possible without access to fluid dynamics and complicated computer analysis , just some good solid grass roots club spec aero options ( I run a classic touring car for example ) Love your vids, great to have you back :)

I'm so glad you're back.

This is cool knowledge for me. I really enjoy your content Kyle.Engineers.

Wow dude. It's good to see you back

His back! Lewis told me you dropped a clip. Very informative mate

Welcome back!!!!!!!

i love your videos! can you make a compairson video between 1980/1990s group c cars and todays lmp1 cars? i think that would be awesome. either way great video!

Thank you, Kyle, for all the videos that you've done.

Glad you're back.

A wing can stall at any speed. Its ALL angle of attack.

You’re back!

Oh yes, I was waiting for this kind of content

Best tool for demonstrating the concept of flow separation: Line Rider ☺

For myth 1 surely it’s the difference in pressure on either side of a surface that counts? It doesn’t make much sense to only talk about one side.

Awesome videos as usual

I disagree with his first claim that aerodynamic downforce phenomena are generated by suction, not pressure. “Suction” is a virtual force much like centrifugal force. Neither are real forces. Suction is an apparent force that is really the result of the higher pressure in the side of the system in question opposite from the “suction” lower pressure. Suction cannot exert a pulling force and only appears to be a force when in reality the net force is only exerted from the high pressure side of the system like an airfoil turned upside down from how it is usually positioned for aerodynamic lift.

There is not enough content about aerodynamics here on youtube. Thank you

KYLE returns!!!!!

Question/idea: can you have a multi level diffuser with slots in the strakes to achieve multiple strake vortices on multiple levels?

Fantastic video!

Came here after watching the news. Feels like a relief watching this

I've been watching your channel for a while with great interest but my race car world is somewhat different to everybody else's. I'm near the end of building a 4WD streamliner to take a shot at 500 mph. It is only 36" wide, 33" high & nearly 40ft long. It would be interesting to say the least to get your opinion on what I'm doing here. It has four full length stakes on each side & the top where the center two blend into an intake duct then terminate at two tail fins then I'm creating a sharkskin type surface between those. There is no driver pop-up, it's a lay-down configuration with the windshield being part of the nose. Should be ready for shakedowns in May or June.

with the pressure side vs the vacuum side part at the beginning. its true that the pressure side is more important because they are the same thing. The "sucking force" is really just the lack of pressure pushing on that side of the aero feature. Also the pressure side can without a doubt create more force than the vacuum side because the atmosphere is only at such a high pressure, if you had a perfect vacuum on one side of a plate and atmospheric pressure on the other it would have the same force on it as if you had atmospheric pressure on one side and 2 atmospheres of pressure on the other. what i mean by this is the amount of + pressure you can create is less limited than the amount of "-" pressure you can make (basically limited bu atmospheric pressure)

AJ Hartman sent me here, and I’m glad he did 😊 Great content!!

Great video. Have you ever considered doing a video on the flexible front wings as used in F1 (notability Red Bull) in the early 2010s? I'd be interested to hear your thoughts in what Red Bull were trying to achieve, and how they were able to overcome the technical challenges to get them to work. Especially in comparison to say Ferrari where they had obvious hysteresis/porpoising problems.

Great video. Can you do a video on the 2021 rule change in F1 and why the high rake cars weren't as affected as the low rake cars?

Great video!

Yes! In! Haven't watched yet but I'm excited!

holy heck he is bacK!

Could you make a video on wheel arch and front end design of enclosed wheel cars in particular please!! This is what my dissertation project is based on (Scanning, Modelling, CFD/Wind Tunnel testing a Civic EF hatchback) so I would appreciate your take on it!😄

Great video! Have you ever looked into mart aerodynamics? Cheers

My friends and I need a debate settled and I think you’re exactly the person to settle it. Another aerodynamicist recommended the bottom edge of our front splitters to be rounded and the top edge to be cut squarely. I know it doesn’t matter: but we all have Miatas.

sharp edges is also a problem not only in aerodynamic but in engine tuning of two strokers where people tend to knife edge al over inside the cylinder where its airflow.

Proud to say i knew everything except for the part about edge vortices at the end lol

Nice thx - if I would do anytungbaro I would love to know how to reduce drag on a daily driver hence save fuel / optimize top speed

Kool video .dose the same rules apply to RC cars and Scalextric ?? Also idea for video getting downforce without drag ...such as drag cars also air going into engine bay the effect on air flow such as air scoops bonnet scoops ECT

Have you ever made a video about winged sprint cars ? Your take on those would be quite interesting and the so called "side force"

this is my content mekka for the next couple of weeks for sure

Great video

It'd be amazing if you could discuss the different aero philosophies used by F1 teams, shows some CFD simulations on various parts, etc

The day my Dad (an Aeronautical engineer) explained that a wing is sucked up, as opposed to pushed up, my mind was blown.

I would love to see a video on duckbill style wing for slower speed racing. Also how it will affect for higher speed. Vs wings

Hi Kyle! I was curious why sailboat with Jibs tend to go better upwind than boats without them. For some reason the multi element wing system works better at closer angles of attack when you are limited on power. I have no idea why that is the case, but people tend to agree that jibs make sailboat point higher into the wind.

Hi Kyle, would be great to see a video explaining (in general terms) the advantages/disadvantages of the wide nose F1 aero concept like Ferrari runs vs the narrow nose aero concept like Mercedes runs. Also the same on the loaded outboard Front wing vs the unloaded outboard Front wing concepts. Keep up the great content 👍😎

Would you consider putting together a basic video on running simulations, aimed at someone who wants to implement aero for a time attack car? You mention flowvis, and I've tried to understand OpenFOAM but I'm sort of lost. I'm not a high dollar builder by any means, but I am super curious as to how aero actually works on the 944. I've heard it was designed without wind tunnel testing so I'm interested to see how it performs, and what tweaks could be made - particularly low-effort / high reward.

Enjoying. I went back multiple times few seconds to look again at graph or listen again what you are saying, but no amount of coffee can save my half sleeping brain today. My question: how high can diffuser start so that it still works. And I am remembering that they do not work if underbody is not flat before it - from your 2017 videos. But is there any usefulness.... Another one is that how making flat floor under the front engine bay can help, and in that case how to successfully still direct engine air like stock, underneath the car? I quess my question is how long under tray at front is beneficial in drag reduction? And how short diffuser and at what height is minimum for any use.

It would be nice to see what kind of airfoils, where and why are used on the various aerodynamic devices on a F1 car!

4WD cars. What is best for drive for front vs rear with regards to wheel rotation speed. 1. Faster wheel speed in the front than the rear? 2. Faster wheel speed in the rear than the front? 3. Both Front and Rear wheels spinning at the same speed? With a focus on two areas; a) The effects on cornering in the above 3 cases. b) The effects on straight line speed / stability in the above 3 cases. Bearing in mind, this must be a common problem to solve/address with cars with bigger rear tires (diameter) vs smaller front tires and the use of varying front/rear differential gear ratios to address it.

Hey Kyle, I would love to see a video about aero dynamics regarding drift cars. I have seen a few crazy sideways wings that drifters have attempted to use to improve grip while in drift. Do those do anything? Its an interesting subject because even at the highest level of drifting they seem to completely disregard aero still. Obviously due to cost and issue of repairing after a crash mid event but still an interesting subject I would love to hear about.

Love your Knowledge. Please Review the 1969 Dodge Charger Daytona (Nascar) Aero front to back. Please consider in the year and engineers Chrysler used for this. Thank you