Brilliant video! An engineer's dream to fix problems simply with knowledge of flow physics and good judgement, rather than relying on sophisticated tools.
Wow! Very informative content! I would love to see more on aerodynamic topics, such as optimal brake cooling, diffuser lenghts and angles, wheel arch venting etc. Thanks for sharing your knowledge!
Just stumbled upon the NACA duct video and this one... why didn't I see this channel sooner!? Great useful information for trackday enthousiasts, grassroots series and even for some pros 👌
This is the most informative video I've watched all year. I autocross a TT in a prepared category and some of these ideas are brilliant for my use case as well. Thank you for posting!
very informative video. goes to show that all the fancy software and analysis won't do you any good without fundamental knowledge and the ability to test empirically and improve based on that. I'm not in the full time workforce yet but that's definitely something my school's Formula SAE team could stand to learn from...
Great work! I now want to improve the aerodynamics of my vw scirocco 3 to reduce drag. I have 2 ideas 1) Use the factory air intakes located on the sides of the front bumper and make air outlet holes in the wheel fender 2) Make a grille in the skirt of the rear bumper so that the air from it goes directly into the low-pressure zone behind the car, thereby reducing it. If you can give me some advice, then I would be happy!
What an amazing chanel you've created! Bravo! 👏 So much knowledge and useful information is very hard to find, and to be so understandable and dense. You're an amazing engineer! This is so interesting, to me at least, I can't believe I didn't find your videos earlier.
I mean once you sprayed it on the car, it should really start driving, overwise it will dry while the flow viz is running down. Same goes for hot surfaces (bonnet etc.) It will be dry before the car starts driving. But as soon as you are driving the flow effect is more significant than gravity.
Nice video and excellent explanations. Where is the car racing currently? I couldn't find any results from several years ago....Great to see Audi sedans be raced. RS4 chassis but no V8? How can I get more details about your build?
We changed it to a 3l V6 TDI for longer range for endurance races, much less pit stops and a lot faster overall. Unfortunately due to the diesel ban we couldn’t race it anymore. We even built a RS5 with the 3l BiTurbo and 400hp, 800Nm, but suddenly Diesels were not allowed anymore.
@@BSport320 That is really interesting. Curious why you chose the B7 platform (vs earlier B6 or B5 cars). Are the aerodynamics better? What does your car weigh and what spring rates were you using? I race a B5 (2001 US Spec) A4 1.8T car in NASA Time Trails and track days. We don't see many Audis at our events-so good to see they are raced elsewhere!
Thanks for insightful video’s!! Many engineers dream of being in the hothouse of intense pressure of F1… you had (it seems, a relatively short) time in F1, and then left. So whats more challenging, being a high-focus specialised F1 engineer or being a freelance engineer with a high diversity of challenges & opportunities? Also, would you go back to F1 (or LMH/LMDh) if approached by a factory?
I've been in F1 for 3 years, which is normal looking at my work mates. 4-5 years is regarded as a long time in F1:) Anyway, I left because I wanted to start my own business and enjoy the freedom and variety of projects now more than being specialized on a particular area. Never say never but currently I am pretty happy being self-employed.
That's not easy to say because the video summarizes one year of updates and the conditions at the Nurburgring are different every time. But with aero updates + some software updates for the engine, we were able to reduce lap times from 10:10s to around 9:50s (25km VLN track)
Great Stuff. A question on the NACA ducts in the floor....you said they had a "step" which was preventing them working efficiently.....how big was this step? The pic you showed had them mounted externally to the floor, with the "lip" on the outside, so is that step (i.e. the 2-3mm or whatever the thickness of the plastic is) too small to be a problem?
The step was 2mm and separated the flow. We could see that with flow viz and at the diff temperatures. After removing the step in front of them, the NACA ducts worked fine.
@@BSport320 Hey, sorry to be a pain but I don't quite understand, do you mind if I email you to ask another couple of questions? Just really curious and surprised how much of a difference it made etc :)
Really enjoyed this video, good combination between theoretical knowledge and understandable practical applications. Why kind of engine were you guys running, why not the NA V8?
@@BSport320 A diesel?! Interesting! Maybe you could do a video about how racing with a diesel engine is different from petrol? Just a random idea, I really appreciate that you take the time to answer my questions.
I wish I do these in ordinary cars,especially overheating like. This model RS4 B7 is known to be thirsty,gets hot fast,now I understand why. Nevertheless,this is interesting channel.
question: are the old open top CanAm cars way better aero-wize? less frontal area, hatchback shapes are better then coupe shapes. i know their are easier to design and cheaper due to no doors or roof. thanks
Seems a choice of compromise: open cockpit so less drag, more flow to the back, but less surface to guide it. Even if the former seems to me the less relevant. Viceversa for every point for the closed one
Vielen Dank, super cooler Content. Ich frage mich gerade, ob ich bei meinem Fahrzeug die Radhausentlüftungen öffnen soll, oder nicht. Es handelt sich um einen Radical RXC. Für wie entscheidend hältst Du die Radhausentlüftungen bei so einem Fahrzeug? Danke und viele Grüße
Hi, vielen Dank. Das haengt davon ab wie die Entlueftung aussehen, wo sie positioniert sind und was du erreichen moechtest. Wir koennen gerne einen Beratungstermin dazu vereinbaren. Du kannst mich gern per Email kontaktieren.
@@BSport320 interesting. Would there be a point where you would sacrifice front tyre size for increased downforce? Or was that simply not a worthwhile tradeoff for a car as front-heavy as the RS4?
As a small team we couldn’t just simply change tyre size on an all-wheel-drive car. We were pretty happy with the mechanical grip and the static downforce of the nose heavy Audi was good anyway. But for more performance at faster corners it makes sense to have them. We worked on front diffusers lateron.
It was the 3.0 TDI in a RS4 body. Better for endurance racing, 3x less fuel consumption, 3x less pit stops, quicker overall and much more torque for quattro.
Video is 2 years old but it popped up in my suggested. Couple things that worry me: these are audi employed engineers, how could they have over looked these simple things? The flat underfloor having a sharp edge is rookie error as an engineer they shouldve seen that from the jump Ducting shouldve also been obvious Im just saying as engineers these shouldve been glaring things that she shouldve seen.
@@BSport320 if they were engineers for engines and couldnt figure out why their engine was overheating does help B. I take your point but i cant not look past that.
Brilliant video! An engineer's dream to fix problems simply with knowledge of flow physics and good judgement, rather than relying on sophisticated tools.
Thanks for showing aerodynamics practically
You are welcome!
Wow. Really a good video. You have more actionable info in 8 minutes than most videos have in an hour. I very much appreciate all of it.
Thanks! Glad you enjoyed it!
I'm really surprised this video only has 8K views after 2 years. Really good content provided here IMO
I'm upset at this channel- because you don't post enough! MOORRRE! MORE!
The over-surface NACA duct problem seems so evident in hindsight, yet must require experience to detect.
Thanks a lot for sharing.
My favorite video on aero. Hands down.
Thanks a lot!
Man i have never learned so much from a single video... Respect for that simple explanation
Glad you liked it!
Wow!
Very informative content!
I would love to see more on aerodynamic topics, such as optimal brake cooling, diffuser lenghts and angles, wheel arch venting etc.
Thanks for sharing your knowledge!
More to come!
Just stumbled upon the NACA duct video and this one... why didn't I see this channel sooner!?
Great useful information for trackday enthousiasts, grassroots series and even for some pros 👌
Glad it was helpful!
Great video! Thanks for sharing. I’m sure this will help a lot of people.
Thanks!
Most underrated video on UA-cam. Thank you for great info.
I would be interested in a video on how analyse flow vis and cotton threads please ! Very interesting video
This is the most informative video I've watched all year. I autocross a TT in a prepared category and some of these ideas are brilliant for my use case as well. Thank you for posting!
Glad it was helpful!
Wow didn't expect practical and applicable tips on aero, best video ever
very informative video. goes to show that all the fancy software and analysis won't do you any good without fundamental knowledge and the ability to test empirically and improve based on that. I'm not in the full time workforce yet but that's definitely something my school's Formula SAE team could stand to learn from...
What an awesome video. Thank you. One thing I would like to know more about is relieving fender pressure.
Love the detail. Thanks for sharing.
Many thanks for sharing your finds ... some of us dont have much track time and this is a great help :)
You are welcome! Let me know if you need any help with your projects!
Great example of aero done right
Super insightful and interesting!
Glad you enjoyed it
Brilliant and simple to understand. Thanks!
Glad it was helpful!
Awesome! More content like this please!
Awesome video. You deserve way more views. Thanks for sharing that guys.
Great work!
I now want to improve the aerodynamics of my vw scirocco 3 to reduce drag. I have 2 ideas
1) Use the factory air intakes located on the sides of the front bumper and make air outlet holes in the wheel fender
2) Make a grille in the skirt of the rear bumper so that the air from it goes directly into the low-pressure zone behind the car, thereby reducing it.
If you can give me some advice, then I would be happy!
Thanks! You can contact me via email to arrange a call.
@@BSport320 Where I can find your email?
Great video. Simple explanations of the problem solving approach.
Excellent
What an amazing chanel you've created! Bravo! 👏 So much knowledge and useful information is very hard to find, and to be so understandable and dense. You're an amazing engineer! This is so interesting, to me at least, I can't believe I didn't find your videos earlier.
Welcome!
Simply fascinating to see, i always learned something here!
Awesome video. Thanks for sharing some of your real world examples. Really enjoyed this.
Excellent video, some very neat info on budget racing.
Thank you so much, please keep making such videos, it really helps a lot.
Beautiful video, very interesting. One of your best
Glad you enjoyed it
Awesome video. Thank you. Godspeed❤
Great info! I will apply some of it for my time attack build as well!
Does the effect of gravity on the flow-vis ever cause issues? Or are the aero effects always much more significant?
I mean once you sprayed it on the car, it should really start driving, overwise it will dry while the flow viz is running down. Same goes for hot surfaces (bonnet etc.) It will be dry before the car starts driving. But as soon as you are driving the flow effect is more significant than gravity.
Very informative, congrats for the performance
Thank you
Thanks for sharing
Thanks for watching!
Such a good video...
Glad you liked it
Brilliant video!
Such a wonderful video!
Nice video and excellent explanations. Where is the car racing currently? I couldn't find any results from several years ago....Great to see Audi sedans be raced. RS4 chassis but no V8? How can I get more details about your build?
We changed it to a 3l V6 TDI for longer range for endurance races, much less pit stops and a lot faster overall.
Unfortunately due to the diesel ban we couldn’t race it anymore. We even built a RS5 with the 3l BiTurbo and 400hp, 800Nm, but suddenly Diesels were not allowed anymore.
@@BSport320 That is really interesting. Curious why you chose the B7 platform (vs earlier B6 or B5 cars). Are the aerodynamics better? What does your car weigh and what spring rates were you using? I race a B5 (2001 US Spec) A4 1.8T car in NASA Time Trails and track days. We don't see many Audis at our events-so good to see they are raced elsewhere!
Thank you for infos
Brilliant
How do you make your flow vis yourself? What was the petroleum you used?
Very nice video 👍
Thanks for insightful video’s!! Many engineers dream of being in the hothouse of intense pressure of F1… you had (it seems, a relatively short) time in F1, and then left. So whats more challenging, being a high-focus specialised F1 engineer or being a freelance engineer with a high diversity of challenges & opportunities? Also, would you go back to F1 (or LMH/LMDh) if approached by a factory?
I've been in F1 for 3 years, which is normal looking at my work mates. 4-5 years is regarded as a long time in F1:)
Anyway, I left because I wanted to start my own business and enjoy the freedom and variety of projects now more than being specialized on a particular area.
Never say never but currently I am pretty happy being self-employed.
Cool. What was the difference in lap time? 😬
That's not easy to say because the video summarizes one year of updates and the conditions at the Nurburgring are different every time. But with aero updates + some software updates for the engine, we were able to reduce lap times from 10:10s to around 9:50s (25km VLN track)
2 tenths
Are there any translations of those races, Would like to see the car on track and chant for your team)
Great Stuff. A question on the NACA ducts in the floor....you said they had a "step" which was preventing them working efficiently.....how big was this step? The pic you showed had them mounted externally to the floor, with the "lip" on the outside, so is that step (i.e. the 2-3mm or whatever the thickness of the plastic is) too small to be a problem?
The step was 2mm and separated the flow. We could see that with flow viz and at the diff temperatures. After removing the step in front of them, the NACA ducts worked fine.
@@BSport320 Hey, sorry to be a pain but I don't quite understand, do you mind if I email you to ask another couple of questions? Just really curious and surprised how much of a difference it made etc :)
@@Jon.S Sure, you can. But you could also ask questions here, it might be interesting for others too.
🔥
Really enjoyed this video, good combination between theoretical knowledge and understandable practical applications. Why kind of engine were you guys running, why not the NA V8?
Thanks!
The NA V8 needed 3 times more fuel per lap which resulted in too many pit stops. The better choice for long endurance races was the V6 TDI.
@@BSport320 A diesel?! Interesting! Maybe you could do a video about how racing with a diesel engine is different from petrol? Just a random idea, I really appreciate that you take the time to answer my questions.
I wish I do these in ordinary cars,especially overheating like.
This model RS4 B7 is known to be thirsty,gets hot fast,now I understand why.
Nevertheless,this is interesting channel.
question: are the old open top CanAm cars way better aero-wize? less frontal area, hatchback shapes are better then coupe shapes. i know their are easier to design and cheaper due to no doors or roof. thanks
Seems a choice of compromise: open cockpit so less drag, more flow to the back, but less surface to guide it. Even if the former seems to me the less relevant. Viceversa for every point for the closed one
Vielen Dank, super cooler Content. Ich frage mich gerade, ob ich bei meinem Fahrzeug die Radhausentlüftungen öffnen soll, oder nicht. Es handelt sich um einen Radical RXC. Für wie entscheidend hältst Du die Radhausentlüftungen bei so einem Fahrzeug? Danke und viele Grüße
Hi, vielen Dank. Das haengt davon ab wie die Entlueftung aussehen, wo sie positioniert sind und was du erreichen moechtest.
Wir koennen gerne einen Beratungstermin dazu vereinbaren. Du kannst mich gern per Email kontaktieren.
@@BSport320 Gerne, hatte Dir direkt eine Mail geschrieben. Viele Grüße
What year were you doing this? I really wanna do this but I live in Canada. There’s no road course or circuits.
Plenty of circuits in Canada
How was the gas mileage
Must have been a lot of fun albeit a lot of hard work to work on this project.
Why weren't you running front diffusers? Regulations issues or something else?
Simply no space. The RS4 has a large engine in front of the front axle and we were running very wide tyres.
@@BSport320 interesting. Would there be a point where you would sacrifice front tyre size for increased downforce? Or was that simply not a worthwhile tradeoff for a car as front-heavy as the RS4?
As a small team we couldn’t just simply change tyre size on an all-wheel-drive car. We were pretty happy with the mechanical grip and the static downforce of the nose heavy Audi was good anyway.
But for more performance at faster corners it makes sense to have them. We worked on front diffusers lateron.
@@BSport320 Thanks so much for taking the time to explain.
More
Turbo??? Was it not the NA V8?
It was the 3.0 TDI in a RS4 body.
Better for endurance racing, 3x less fuel consumption, 3x less pit stops, quicker overall and much more torque for quattro.
@@BSport320 ah I was also wondering for a moment there 😅 How much power is it making? I’m assuming just about 350hp given the top speed of the car.
That’s pretty close. The mono turbo versions were around 320hp, the later bi turbo engine we used was around 400hp
Video is 2 years old but it popped up in my suggested.
Couple things that worry me: these are audi employed engineers, how could they have over looked these simple things? The flat underfloor having a sharp edge is rookie error as an engineer they shouldve seen that from the jump
Ducting shouldve also been obvious
Im just saying as engineers these shouldve been glaring things that she shouldve seen.
In their defense: They were engineers for engines, brakes, electronics. They had no aero or cooling guy. That's why I joined the team.
@@BSport320 if they were engineers for engines and couldnt figure out why their engine was overheating does help B. I take your point but i cant not look past that.