WTF is Aero? The Basics Explained and Myths Revealed Pt1 - The Front End
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- Опубликовано: 10 июл 2020
- Aero is a huge topic when it comes to cars, but we've gone and explained the basics in a way you can understand. In part 1 we cover the front end, including cooling, bonnet vents, diffusers, splitters, flat floors and more. Special thanks to AMB Aero.
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After 15 years of car "enthusiasm" I thought there wasn't much left to learn... then this comes along and funnels that notion right upside down and through my under tunnels.
There's always more.
Always.
I love it :D
You probably know more about aero than the video. The video breaks laws of physics many times with the explanations. The mods do what he says but not why he says. Not at all
@@LucidSnapshots I'd be curious to know what you think is wrong in there because it all seems pretty right to me. A successful race car builder with championship wins is vouching for that video as well.
I've watched this video at least 20 times by now. Excellent work!
What a nucking futs episode Andrew 👌 just smashed 10+ years of misinformation rolling around in my head I thought was correct, really enjoying the the technical episodes lately keep it up!
I took the undertrays off my A5 2L turbo for a diverter upgrade. I didn't put them back on thinking the drag assist was neglible at Aussie speeds. I was going to put them back on eventually.
Then I upgraded the stock intercooler to a massive Wagner competition unit. I didn't see the performance or IATs I thought I would get.
THEN I put the undertrays back on, holy crap did it pick up torque, power, and throttle response. Your description of air routing through the engine bay and heat exchangers really woke me up to the differences it makes. Cheers.
I've been thinking about custom ducting/trays for my car since they are long gone, timely reminder about how necessary they are!
You’d think that after 4 months of this video being out, you’d stop seeing the lifted hood. I always thought it was for clearance, talk about educating myself. Awesome video guys!
Brilliant video! Very well explained.
This was like an introduction to fluid dynamics class. I have learned so much in 40 minutes, thanks Andrew.
This is nowhere near an introduction... There is so much more knowledge you need to know before you actually can understand compressable flow
This is a 40 minute video?
...oh, shit, it is.
@@manivsewparsad2511 hence why I said introduction.
This video is extraordinarily useful.
Exactly what I was looking for.
A lot of this confirms my instincts, but I’m now less aerodynamically dumb than I was before watching
I’m grateful
This is actually a lot of what Julian edgar has has been talking about in his book and on his youtube channel! Apparently the best way to improve a cars aero performance is just an undertray, it reduces so much drag and lift that its a very noticeable affect on the car, and its just an aluminum sheet.
does pvc sheet works?
@@ilham7345 If rigid, yes, any rigid flat material will work.
all these videos are so great!
Thanks so much for putting all the work in for these excellent and informative videos!
This was a legitimately brilliant video, I learnt a lot and look forward to future entries to the series. Keep up these killer videos 👌
Amazing video.
Really looking forward to learning more in the next of three series!
Awesome Ep mate! Hangin' for Part 2!!
Really good video. One of the best I've seen on racecar aero. It has taken me years to learn and apply most of the info here into my car!
I learned quite a lot from this video, love this series!
Well worth the watch!
"This could be a 10,000part series..." I was think surely not but yes, yes it could be.
Such a great explanation and im looking forward to the rest of the videos
Great video. With regard to the radiator, air only flows through them if there is a pressure differential between the faces. So, by expanding the air on the intake side, as you have done, the pressure increases as the speed drops, thereby increasing the differential pressure allowing more air to flow through thereby increasing the cooling effect.
These Motive Video videos are so good, i learned a heap from the dry sump video and even more with this aero video, thanks a million :)
Absolutely excellent mate 😁👍 I thoroughly enjoyed your previous episode on Jet 200 with Andrew Brilliant but the information in this episode is great & I can't wait for the next part!!!
I knew a fair amount of what was said but the explanation of the splitter air dam & how to tweak the parts, such as the positioning of bonnet vents to make aero more effective was REALLY useful...
Thanks again Andrew. Keep up the great work & informative videos ✌
That was bloody excellent. Currently getting more serious about sprints in the R33, and this was jam packed with just the right level of depth that I needed, and it was digestible to an enthusiast the whole way through. Excellent work mate!
Best practical aerodynamic video ever.
Thanks for a great video, you explained very well and concisely.
Thank you for the info, looking forward to the next part!
That was super interesting, watched it all in full. I’m not looking for more speed but more fuel efficiency, loads of great info. Especially the air halt hat gets trapped in your front bonnet and slowing down the air into your inter cooler . Great video Andrew !
This was great, thanks. Learned a few principles I can apply to my daily
Very informative. Thanks for taking the time to do these regular videos. This is one of the best channels I've discovered for petrol heads. Hello from Scotland.
Yes! We need more aero content Andrew! Great stuff!
Great video. I have a front end lift issue I need to work on myself.
I just learned so much during this video. Thank you so much Andrew!
One of your best videos Andrew, very well explained.
What a fantastic video! From an engineering student myself, really really well structured and informative.
Thanks. Good introduction to such a detailed topic.
This was a great video. Thanks for producing it!
Great video Andrew, much appreciated cheers.
You ‘re the best .This is the very well and simple expleain of aero .Please keep going .
This was very informative and explained very well, differently learned a bit more.
Man I've been looking for some quality aero info since Kyle Engineers stopped uploading! Functional aero is probably the most cost effective mod to a performance car.
Thanks for this Andrew. I found it helpful and really educational 👍
super impressed with this video...but now I have so many questions.
M8 really enjoyed this video and helped me to Design and understand what I need to do fro my road/track car. Looking forward to the rear video
Thanks 🏴
Fantastic, this video is brilliant and I send my greatest of thanks for making it!
Really interesting video opened my eyes to a new element in racecar building thank you Andrew Hawkins 🤟🤟👌👌
That was very informative. Thank you.
Thanks Andrew. Great explanation
Great insight thank you! We’ll get an answer to your Leroy conundrum soon enough as a body is being made at present.
Wow. Thanks for all that! I know a lot of the theory, but it's great to see the practical application of it
I enjoyed that. I look forward to the next one
Really great vid very informative never knew just how much are affects the car.
Dude !!! Such a great video! Can't wait for more
Great content and explain !! 👌
Very Cool Video with lots of useful information!
That's what i call introduction to knowledge, thank you!
Well, that was bloody fascinating
Excellent video, thanks. Pip
Exactly what i needed and Just in Time.
Man what a video! Thank you
Appreciate your vids, especially gtr no secret, please more vids. Keep it up!! Subscriber here....
Highly recommend Simon McBeath's book to anyone interested in racing aerodynamics.
Hey, thanks!
I feel more educated now, good video 👌🏻
Great info 👌
Awesome video!
This is awesome!
Thankyou 🙏
Great video
Greetings guys, I have done a lot of research trying to find out something like this for many months, you guys really have the knowledge and expertise on this !! We have built a couple of projects here in Costa Rica following your tips , great , amazing video !!
A lot of factual and useful information. Street Bandito also did a video on aero that compliments your session with not much difference. Check them out. They added tunnels to create the high and low pressures whilst taking the air around the front tires.
Wait you were in the airforce?? Might want to do a random video and have a yarn about that and other shit you have done with your life that has gotten you to this point?
Wait you've never seen Andrew's hektic jet tats? bruh was a steely eyed missile man
@@HHCHunterYTC no I haven't 🤣🤣
It makes more sense why the cars are named "jet" now
There is going to be some hacked up front bars and bonnets this week.
I love tech talk stuff like this.
Well done video!
Great video!
Great video!! 5* mate!
Nice 1 andrew 👍
Great vid!
Flat floor over a certain ride height is better. Under that height, it create more drag. Conversely, having a rough underside at a certain height is better, but not at height....controlling the boundary layer is where it’s at. Awesome stuff as always.
I'd be curious to know where you studied this theory and proved it, as it's not what we've heard from leading aerodynamicists.
Motive Video let’s get together for a beer then, not enough scope in this format.
Another brilliant video, thank you. One question, why not put bell mouths on the holes in the bumper to the air filter? Would this help to feed more air into the filter with less drag? Or maybe even mean you only need one hole?
Loved it!
Great Video! Where did you get the pair of louvers that are in the hood?
you are almost there, its angle of attack that creates down force and the shape of the wing that stops the separation of air flow from the wing. Bernoulli has little effect on lift apart from separation of the air flow from the wing. You can test this by blowing on a sheet of paper, blowing underneath requires a lot less effort compared to blowing over the top.
We're keeping it simple. And explained both of those principles. Remember most people watching know zero about aero
@@MotiveVideo Bernoulli principle tends to confuse a lot of people. angle of attack makes a lot more sense when you use the example of rowing with an oar
We did explain that theory as well
We explained that theory but people need to understand low pressure created in tunnels and diffusers
Cleetus actually ran Leroy in a windtunnel. And they calculated how much faster it would be with a body on it.
We know. We're friends
Thanks Hawkins. Awesome info. When’s the next ep?? Can’t wait.
2 weeks mate
Good video 👍👍👍! As a fellow RUclipsr, I am on the lookout for fresh ideas! Great Job!
so you see people removing bonnets to aid with overheating. how would no bonnet affect things?
The bonnet needs to be there to be smooth exterior as well as actually ducting air around. The vents are there to mainly create low-pressure zones underneath as the air travels above them which basically sucks out their air. (Not high-pressure areas like he explains). The air on top doesn't want to go back in the bonnet really as that would be like adding thrust to the car lol
This is awesome. Thought it was going to be too “basic” it was not.
This is Motive Video. We don't do basic :)
That's was a very interesting video!! Tho you didn't cover hood scoops like you would find on a STI any comments on them? Thanks
They're terrible for aerodynamics
Will u do a video on brake ducting?
Step 1. Buy whole bunch of ebay spec "aero" bits.
Step 2. Watch Motives WTF episode.
Step 3. Throw out all ebay spec crap lol
Funny story. The centre bonnet vent started life as an eBay generic vent that we modified.
@@MotiveVideo That is it, some people go ham, but just need some good basics to get the result they are after. Like on a cold day you can cover up the holes full or partial depending on the data with some tape.
I've been increasingly more interested in aerodynamics and have been wanting to get my hands on a CFD program to mess with potential aero ideas for my R32 GTR, Mostly to solve the front end lift issues at high speed & also to see how much drag one of those fujimura carbon gurney flaps make lol
Have a look at OpenFOAM. You'll need a modelling program as well to create the geometry. This will likely be the most difficult to do since other than correct dimensions etc you'll need to decide the fidelity of your simulation and how that will relate to the level of detail of your model. Without access to some significant processing hardware you'll be limited by your computational resources so keep the model simple. Of course this has limitations in that with the low fidelity you won't be simulating some of the interactions of smaller parts of the car... CFD is a harsh mistress!
Its amazing how much you can get out of a simple fluid dynamics principle:
As channeled air passes through a section of different cross sectional area, the velocity has to decrease or increase to keep the mass flow constant. With a diffusor, the area increases and velocity decreases. That reduces the dynamic pressure and the total pressure in effect is decreased, creating a low pressure zone underneath = downforce.
I wonder, however, how much active aero would help some of the problems you see here - and if turbos would benefit from something like a small reverse cowl to suck air from. In general, fans have been used on racecars to make them quite sticky to the road - are they completely banned from time attack?
Reminds me of a lesson you gave around ‘96😁
?
I think one of the reasons why the R35 GT-R was so much quicker then expected is because of Aero. You have to accelerate the mass and apply force to counteract the drag. The power and traction element allows it to get past the range where its weight mattered a lot less compared to drag, but its contemporary rivals all had a much higher C/D.
Very interesting i want to improve my aerodynamics on my bmw
Dude, take a sub. Seriously good channel.
if u want stock car that is preety grounded at hight speed astra G in wagon
ive done 170 (1,6L) and actuall issue of this car was rear end lift when cornering without accelereation if u pedal to the metal on the corner balance was keeping rear end grounded
stock front lip is actually designed preety well and front vent is almost fully covered with plastic (u can take it off btw) i gotta say that ive drive it hard when it was 30 C outside and radiator fan didnt have to start blowin,g coolant was keeping 80 C so taking off that cover isnt necesary at all
that limits air under the car and pressure in engine bay
no lift babe
but its actually slippy on low speeds
ive crashed it at 40km/h when understeer kicked in half way the corner
but anyway preety fun car i cannot recomend compact or coupe ive never drive one but those have even more weight on front and rear end might be a real problem
I have shared this video with my Nismo club here in costa rica and everyone is getting mad!!, greetings guys!!
Mad as in good or mad as in their theories are wrong and they're upset?
@@MotiveVideo hey no no, mad as goooooooooood you guys really know what you doing!!! actually we built a S14 with RB26 following many tips from your videos, low budget ofcourse lol
36:45 haha! I was in the middle of typing up a comment where I was going to recommend you put those guys in touch with Cleetus to make a body for the vette, I'm sure it would be well in the 6's with a body. Though probably too fast for the current cage who knows. Too funny though
They know that Leeroy could go much faster with a body but the whole point of Leeroy is that he is a road-buggy
You haven’t seen the Leroy air tunnel episode I guess ? They know it’s shit but they built it just because / they can and maybe it shuts off enough people lol
Check this out all questions answered
ruclips.net/video/1X35-bGWpEY/видео.html
That NASCAR aero display is pretty fantastic. I remember when the “car of tomorrow” came out and all of the hate it got.
Yeah but tbh I still love the wing on the 2009 cars way better than the little duck tail they have now
What about more info on the side skirts?
You showed the bonnet being raised and the pressure zones on the white board but can we see CFD proof of this actually happening? The is a high pressure zone there on unmodified cars because its a sharp angle change but what happens when you reduce that angle with the raised hood? isn't there a high pressure zone at the firewall from all the air coming into the engine bay?
what about vortex generators? i remember that cannards are kinda vortex generators
Awesome content, can we find a sponsor for some good whiteboard markers though ???
The markers are fine. People watch on small screens