F1 Aerodynamics - 3: Slots, Diffusers, Bargeboards, S-duct 

ChrisC7498 Gaming it's implied why do you ask?

ChrisC7498 Gaming - while implied I imagine it’s still appreciated... great video *Chain Bear !!!*

This is quality, RU-vid should pay him!

Good drawings. If you can put a little bit more detail on specific parts you want to explain why they are thet shape, that would be awesome! Great videos you make, with the simplest and best explanaition on RU-vid. I think I am beginning to understand fluid dynamics a bit due to these vids. Thanks!

I thought your 3/4 section was fantastic! Keep up the good work!

Rear endplate discussion was quite clear. All three videos are good stuff for the technically inclined.

Could you do a small video, to explain Renaults Exhaust solution and how it affects airflow under the rear wing? Great video as always. I liked the 3/4 style and had no issues, to understand your explanation. Keep it up!

Chain Bear F1 Can you explain why Ferrari has those weird mirrors?

Who said he isn't hired though :)

But there's no sense crying over every mistake. You just keep on trying 'till you run out of cake. And the science gets done and you make a neat gun for the people who are still alive! :D

+1

Haha 5years later but same !

@@frikadel4972 nice!

​@frikadel4972 what's formula student 🤔

@@skpist it’s an international competition made for engineering schools, where teams of students make their own single-seater and compete in summer against other teams

Be very skeptical of any offers of cake from ChainBear.

So these things particularly temperature and elevation drive the air density. Density goes up with increasing air pressure (decreasing altitude) and down with increasing temperature. The aerodynamic forces are proportional to density (all else being equal) so on a hot day in Mexico (highest altitude track AFAIK) you get less down force and drag. Interestingly with a turbo car the engine power isn't necessarily affected as much by altitude (atmospheric pressure) as the turbo can provide boost to bring the power up to close to sea level power. So Mexico might be a great place for straight line speed (normal engine power & low drag) but you won't brake or go around corners as well (low down force). I would expect in Mexico they would set the car up for more down force (i.e. higher angles of attack on the wings etc) than they would on the same track at sea level.

Ok so Downforce is air pushing down ( very simplified ) So if air is denser,there should be more downforce So cooler,lower air ir more optimal Idk about humidity

@@guanweihe7614 3 years late, as humidity increases density of air decreases as the water particles take up some of the space that could be taken up my air particles. So you want high pressure, dry, cool air for best aerodynamic performance. It’s also the same for engine performance, for best power output you want high pressure, dry, cool air.

I'm not sure but I believe the reason why some want it back is because unlike with wings the dirty air of cars in front shouldn't be an issue, or at least as much

Yeah, lot of the drivers complained about the dirty air last year. I mean, if ground effect helps F1 being more competitive, do that. Seems more simple and cheap than changing the whole engine spec again.

If I recall it right, ground effect in the way it was used by Lotus was like a suction cup, sticking the car to the ground on the straight lines and in the turns, but the problem was that the car was so dependant on it that if the effect was lost (by hitting a bump or another car), the car would fly away, so it got banned for safety reasons. Today's cars also produce ground effect, but not in that hermetic almost perfect way, so the car is not totally dependent of it.

Keep in mind that flat floors and diffusers are still creating "ground effect", it's the same effect as before, they've just limited the ways in which it can be generated, not allowing full car length underbody Venturi tunnels anymore. Some reasons why it was "banned" (limited): Back in the early days of late 70s and early 80s they were great at generating high amounts of downforce, but weren't too good at making it stable with varying car attitude (rake, ride height, body roll, etc.), and some cars were prone to what's known as "porpoising", where the car would get sucked down, altering the ride height, which would then reduce downforce via e.g. starving the underbody air flow (or alter the distribution, perhaps making the rear end squat more than the front), which would raise the car, which would help feed the underbody airflow, rinse and repeat, causing the cars to kind of wobble around with the fluctuating aero forces. These days we understand these things much better, and can design underbodies that aren't anywhere near as sensitive and behave more stable. In all honesty a lot of this was already solved by Group C and IMSA GTP prototypes, which heavily used underbody Venturi tunnels etc. to great effect without major issues. The prototypes/GTs that flipped at Mulsanne came nearly a decade later and due to other reasons. Heck, we have people designing ground effect _road cars_ these days, they wouldn't be even considering that if they weren't sure they can design them to be stable. =) They were seeing a suddenly exploding amount of downforce compared to what they'd had before, and one that was (as mentioned above) often very sensitive and could me lost in an instant. Combine that with the relatively low grip levels of tyres back then and you have a recipe for scary situations. It does make sense that they'd ban it. These days we're making more DF than they had back then anyway from the underbody and wings, and our tyres are also so much better (put an 80s F1 on modern tyres and it'll go many seconds quicker just due to pure mechanical tyre grip alone), that in combination with the more stable aerodynamic behavior we can create anyway I doubt it'd be a really huge problem. I do think that moving towards more underbody aero and less wing aero is the way to go in many ways. The main reason why front wings in particular are so insanely overdesigned is that they want and need to create vortices to extract whatever performance they can from the heavily regulated underbody. Radically simplifying the wings so that they're not generating such overwhelmingly strong vortices while relaxing underbody regulations to enable cars to make more use of it should help reduce the effects of dirty air significantly, making the aero more efficient overall (efficiency is good, right?), helping in part to provide for better racing.

It's coming back in 2022😁🤘🏼

Also used on commercial airliners, during take of and landing in the addition of flaps to allow a larger angle of attack before stalling the airfoil, this allows the pilot to take of earlier and at a steeper angle. The flaps just elongate the wing so it can generate more lift but also more profile drag, hence why they put them away again after the intiail climb