Physics of Racing

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Instagram: Physicsofracing
UBC Sports Car Club hosted lecture on the physics behind racing and car set-up. I will ultimately evolve this lecture into a multi-part series for online delivery.
Two short videos have been trimmed out of the lecture for copyright reasons. The impact on the content should be very minor. Links to the original videos are provided at the end of this intro.
Please sign up at physicsofracin... if you'd like to be notified when the course offerings become available. I hope to be able to develop at least the first of these in 2022 - thanks for your patience. I hope to include many elements left out of this lecture, including some material on powertrain, engine tuning, aerodynamics etc.
In the meantime, I've created an IG account - Physicsofracing - to answer any questions people may have on car physics. If you have a question, tag me in your post and I will try to answer, or DM me with a question.
Please forgive any errors and usage of a broad range of material from the internet. If you have any comments or spot any errors, please do email me at andre@phas.ubc.ca and put "Physics of Racing" in the subject line. Thank you to all who provided material for this lecture, and special thanks to Ferrari for use of their Pilota Corsa slides.
Trimmed videos:
Sebastian Vettel 2017 Singapore pole lap
www.youtube.co...
Ari Ventanen near miss (at 2:03)
• "Oh Dear God" Ari Vata...

Опубликовано:

29 сен 2024

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Комментарии : 437

@integrantedavidanoturna 11 месяцев назад

I only absorbed around 20% of what he said but I managed to get 4secs off on racing simulators just by watching this. Awesome video.

@t3hgir 9 месяцев назад

good, focus on braking points. That's where noobs lose lots of time :)

@alexsharp9813 4 года назад

This is literally the best lecture on racing physics I have ever seen. Thank you Sir.

@zonghanlee776 2 года назад

@Vladimir Putin bruv where did you go bruv

@datNERO17 2 года назад

Its the only lecture on racing physics you have seen lmao

@dmor6696 2 года назад

@@datNERO17 ahahah you just saved me the trouble

@pbuzzi 2 года назад

@@zonghanlee776 qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq

@lookoutforchris Год назад

This is literally the most ad filled video on RU-vid. Every 3 minutes there are 8 minutes of ads. I have to skip shit so often I can’t watch this while I do something else.

@kennyg1358 2 года назад

I'm fascinated with how athletes intuitively discover physics efficiencies. The brain and nervous system are amazing partners.

@SaintedPIacebo 2 года назад

The most fascination thing about this is just how much of this the drivers learn by experience and feel alone. Its like a baseball player throwing a ball, they might understand some of the physics of what they are doing and the cause and effect of their inputs, but many have no idea the technical aspect of what is going on, they simply feel math and data on a subconscious level and its simply amazing!

@onemorething100 10 месяцев назад

I assure you, The best of the best drivers know this.

@WelshAl 3 года назад

An outstanding gift to those of us who can't speak engineering. There were plenty of references which I could relate to not summarised in Greek letters. Thank you

@shouldigetit 2 года назад

Wonderful, thank you!

@pasteghost428 2 года назад

Everytime he does a flex, he sniffs his nostrils. Like, "I'm a Racecar driver and physics professor, no big deal, *sniff*“

@yanggybabyghoatyanggy2696 2 года назад

went to sleep and some how woke up on here ... im not mad this was gold lol

@imadrifter 2 года назад

Like how God Hand does it. Not quite grip but not quite drift, in between.

@bilo1897 2 года назад

Wow where was this professor when I was in college 😭. So cool!

@Mike2004Fede Год назад

1:31:55 RU-vid: Ari Vatanen's huge near miss! In Car Manx Rally 1983

@gtfree1809 2 года назад

best video ive seen, period

@jpg_6 2 года назад

BMW e36 M3 as a daily driver, what a legend!

@theedge5584 3 года назад

This Guy is living my Dream

@brianhiles8164 Год назад

(01:06:00 _et seq._ ) For the mention of the desirable characteristics of positive caster angle, you do not mention its effect upon anti-dive configuration. Is this pertinent?

@Andremarziali Год назад

It is pertinent indeed. I've left a lot out of this lecture, including anti-dive and anti-squat. I know it's nearly 3 years overdue, but I'm still hoping to provide more content at some point to fill in those gaps.

@obtrunco 2 года назад

There are a lot of missed clips and audio from this video.

@isabellamayumi8964 6 лет назад

racing is sooo coool thank u

@Ryosuke324 2 года назад

My question is. Where does HEAT as result of friction is in this Equation?,or its in F=uN

@Andremarziali 2 года назад

Hi Abel, F=uN only determines forces. The determination of heat, particularly in a tire is much more complex. In the elastic regime, there will be heat dissipated into the rubber due to (near) elastic deformation of the tire. The amount of heat here will depend very much on material properties of the rubber. For example, a steel spring being bent repeatedly in its elastic regime doesn't heat up much at all, but a squash (or racketball) ball being squished a few times heats up rapidly. Tires are somewhere in between I think, but will depend on compound. Separate from this, when a tire is in its frictional regime, a component of the force vector multiplied by the distance it is sliding will result in "work" being done on the tire that results in heat. This can be dramatic when it is focused into a small section of the tire as in under braking where the wheels are locked up. In that extreme case, the entire kinetic energy of the car being slowed down is being dumped into the contact patch (assuming the tire is kept locked so the brakes are not absorbing energy) and the rubber rapidly melts - hence flat-spotting. Hope that helps.

@elijahvy4844 2 года назад

I like drifting so....

@nilskoesters161 2 года назад

It's midnight on a friday and I am watching a lecture... I think this means this is pretty interesting to watch. Real good job sir. It's real fun listening your lecture :) Thank you

@martinarbe1 2 года назад

Same lol, 2 am and a beer and a joint. Very well invested Saturday imho

@Deus_1 2 года назад

Same, one week later :)

@roddydykes7053 2 года назад

1:30am Sunday for me

@tmyfatmufo 2 года назад

@@Deus_1 same lol saturday 1:50 am só Friday started lol

@zachbargo 2 года назад

midnight on a friday for me aswell😂

@MrDrivingFaster 3 года назад

I don’t know if I have ever seen somebody who knows the physics and knows the racing empirical knowledge so well. Great content

@ZachBZera 2 года назад

I know this is old but I would also like to add that he has the teaching skills to explain it in an easy to understand way

@TomatDKProductions 2 года назад

@@ZachBZera best teacher ever

@muhammednoufal2972 2 года назад

Oh oh o go

@stanbunicu 2 года назад

@@muhammednoufal2972 de a se poate in JJ JJ watt JJ JJ JJ. John in

@stanbunicu 2 года назад

@@ZachBZera are going out for

@oliverhardin1413 2 года назад

This was an incredible experience. I just sim raced with a bunch of new friends to racing and I have no idea how to explain what I feel when driving. I’ve come up with vague concepts for it all but none of it made sense to them. This video was crazy because he was literally explaining everything I never knew had terminology for 😂

@TheATLTengu Год назад

Dude a year or so later and I'm now seeing this video. Can't lie I wish you just sent me this because this is the first time I've understood the physics of racing lmao

@pozkodeth 10 месяцев назад

I shit and piss @@TheATLTengu

@vancedgalaxytab331 2 года назад

This is pure gold for a car enthusiast/engineer like me. Gives me a much better understanding of what I should be doing on track. Thanks for the awesome lecture👊👊

@TanmayPanchal46 5 лет назад

For someone who has been visiting tracks for years, this lecture has been a very educating. I was instantly able to relate with the practical driving techniques we have been taught. Amazing stuff..!!

@michielvanstaden2698 6 лет назад

I love this, the MR2 joke blew my mind.

@decoduck 3 года назад

26:05

@user-cc32vcg811 2 года назад

@@decoduck man's doin god's work. Appreciated it

@ChenSergio22 2 года назад

Maybe thats the name really came from🤔

@davidcito739 2 года назад

MR2 actually stands for: Midship Roundabout 2

@intelsilver 2 года назад

@@davidcito739 Wasn’t it Mid-engine Rear drive 2 seater?

@ianconn951 6 лет назад

Thank you for this. I can never find anyone in the car world (irl) who thinks about automotive engineering from a math perspective. Amazingly dense and informative.

@BradsHacks 3 года назад

I doubt you were talking to automotive engineers then lol

@johnkodera9926 3 года назад

Hard to find people with proper background. Everyone thinks they are the expert but sadly is it rarely the case.

@DizzyD2 2 года назад

bro no way you said no one thinks about engineering from a math perspective? lmao so dense

@apoxalypsewhen 2 года назад

@@DizzyD2 i think he meant racing like driving in a math perspective

@Madoomabusa7410 2 года назад

I was about to say I have the same issue but Im a automotive, mechanical and systems engineer lol

@recca7 2 года назад

I fell asleep while RU-vid was playing in the background and woke up into this🤯 thank you RU-vid gods 🙏

@d35p0 2 года назад

Reporter: So why did you crash today? Professor: I didn't have enough traction budget

@MrToshiba10 3 года назад

For the Vettel onboard video it should be noted, that in F1 onboards they never show you how much percent of the maximum braking force is applied unlike for the accelaration, so they only show when braking is applied (I think because it is so crucial for laptime, the teams don’t want to show this metric to their opponents). This should become obvious if you listen to the rest of the lecture, but it still might cause some confusion, if you are not aware of this fact. In Le Mans broadcasting this year, they also showed how much braking is applied, which kind of suprised me.

@MrHaggyy 2 года назад

At the F1 level you actually don`t know how much braking force you can apply- as it highly depends on the tire, surface, and temps. Also, the pedal is way more pressure-sensitive than position-sensitive. The way you can move the pedal is highly correlated with the way the caliper has to move the brake discs. The actual braking is dosed by the amount of force your leg puts on the pedal.

@ugn669 2 года назад

If you sign up for F1 on their website you get access to full live telemetry, including throttle and braking.

@maxlundquist 2 года назад

@@MrHaggyy all of what you are saying, including the fact that it’s dependant on pressure, applies to any car

@MrHaggyy 2 года назад

@@maxlundquist yes it applies to any car but depending on the geometry of the hydraulics and how the brake booster works you can have more or less of it. My VW Golf has 3-4cm from light braking to looking up and it`s barely any force required to look them up. In Formula cars, you work with 1-2cm some even prefer no movement at all and the pedal force is equivalent to anything between 100-300kg.

@thecompanioncube4211 2 года назад

@@MrHaggyy I was watching an interview the other day of a car journalist (?), who is not a small stature guy, got to drive an actual F1 car and when he sat in the seat they asked him to push the brake as hard as your life depends on it and the engineers said it was impressive that he achieved 70% brake force... F1 drivers are almost superhumans

@abicol6010 2 года назад

As a physics major and a sim-racer I loved this. How have I not found this till now

@dankbuds6171 5 лет назад

Thank you so very much for this! Having been dropped out of high school,my mathematics limits me from further understanding of how to properly balance and setting up my vehicle for racing and cornering. This where stuff learned in school can be really useful and applied to the real world. I will be bookmarking this video and watching it over and over again. Thank you again Sir Marziali for this wonderful video! 👌👍👍

@jorgesanchis5477 2 года назад

isefull only if you like racing and i think its not the most usefull thing

@CrankyBuddha 2 года назад

@@jorgesanchis5477 Understanding the traction circle and the way grip works is absolutely useful in every day life if you drive a car or ride a motorcycle. Perhaps unintuitively, being a good racing driver will make you better at driving normally.

@SimRacing604 2 года назад

This was a phenomenal lecture. Thank you for sharing it

@thebreach4650 2 года назад

Hey Mike ! What a pleasant surprise to see you here !

@SimRacing604 2 года назад

@@thebreach4650 hey hey! It’s an invaluable lecture for a sim racer like me!

@lorddoobsworth144 11 месяцев назад

To an American, accuracy means being within inches, not feet. But as a highly sophisticated European man accuracy means being within millimeters, not inches.

@wyland_6247 4 месяца назад

As an American, noted 🤣

@Aiophgy День назад

What kind of snooty bs is this

@ali09gaming58 3 года назад

We need your knowledge for sim racing

@brucerobertson5919 3 года назад

Great content in this lecture, but I have to pull you up on one thing (just to be picky because I teach this stuff too). There is a common misconception that "pitching forward" is creating the longitudinal weight force (or rolling is causing the lateral weight transfer), and at 33:33 you mention the front springs "generating a force" to balance the moment. Actually it's the tyre contact that generates this reaction force, nothing directly to do with the springs. The springs are just the messenger as they transmit the elastic component of that weight transfer. For those that don't believe this, imagine a car with the springs replaced with a block steel... the weight transfer happens (very almost) exactly the same, but there is no spring to "generate a force", nor to allow any "pitching forward". This is sort of like how a racing kart works, where the only spring is the tyre, but there is still plenty of weight transfer happening.

@Andremarziali 3 года назад

Thanks! You're right of course - I was simplifying to some extent to keep the discussion short. Yes, indeed the reaction force is generated at the contact patch of the tire, and transmitted to the chassis of the car through the suspension members and through the springs (or just the suspension members in the case of a kart). Interestingly, it is not necessarily true that the entire normal force at the tire be transmitted through the spring, as the various suspension angles may cause some of it to transmit directly through the control arms. Caster angle can also increase the force applied to the springs, so the relationship between the compression force at the spring and the normal force at the tire is complex. What I calculate (approximately) is indeed the normal force at the tire, which is related to the spring force by geometry in the steady state regime. The dynamic regime (where the dampers play a role) is also really interesting, though out of the scope of that lecture. For me, the real point of that discussion (and personal epiphany) was that the CG height has a strong impact on the degree to which a car will feel trail-braking effects. I'll be revisiting all this in my new lectures whenever I manage to get those recorded - hopefully in the next few months.

@brucerobertson5919 3 года назад

@@Andremarziali Yes, another way of looking at it is that if the pitch center and COG were coincident there would be no spring compression, but still weight transfer. Anyway I really enjoy your intuitive approach based on physics knowledge and driving experience, and have learned a couple things. I'm still not going to roof chop my M3 though :-)

@Mario-ox1wc 2 года назад

@@Andremarziali Your explanation made me realize why trail braking is such a strong effect in motorcycle racing, they have a much higher CG as a proportion of the wheelbase. The understeer effect is also very strong when applying throttle though it can be greatly tuned by adjusting the rear swingarm angle in order to work with or against the the rear spring. I think that works by altering the CG but the relationship is not clear to me yet. Must learn more.

@Ozzy3333333 2 года назад

24:40 the yaw axis completely depends on the suspension geometry, and most times it pivots near the rear axle, not the center of the car.

@Andremarziali 2 года назад

Excellent point! I wonder whether the "static" yaw axis (meaning the point the car pivots around in tight turns at parking lot speeds with virtually no slip angle) is the same as the effective yaw axis in a turn where there is slip in the front and rear tires. Presumably, with low front slip angle and high rear slip angle, the yaw axis would move forward. I'm really not sure what this looks like during turn-in when yaw moment is most important. I'll have to think carefully about this. Thanks for bringing it up!

@glowiever 5 лет назад

NICE!! Plenty of infos for simulation building. The information contained in this lecture is so hard to find on the internet.

@yuvarajbadiger700 3 года назад

Thank you very much... It was lucky that I came across a lecture like this. It was mindblowing to expand my views on physics of racing...

@UOTDF 2 года назад

@Andre Marziali - thank you for this wonderfully informative lecture. I have my first drive in a couple of days time of my 488 Challenge Evo and thanks to your lecture, I am now only 95% crapping my pants! Great stuff 😊

@Andremarziali 2 года назад

Fantastic! You'll love it. My friend with the 488C Challenge is also upgrading to the Evo package soon I think. Can't wait to try it. Just brake in a straight line!! These cars are super sensitive to trailbraking😅

@UOTDF 2 года назад

@@Andremarziali thanks! All advice welcome!

@UOTDF 2 года назад

@@skulle it was sensational. What a car! Once the heat gets into the slicks, the level of grip is phenomenal! Braking is outstanding too, although perhaps a little contrary to @Andre Marziali’s advice, I was able to trail brake effectively right into several corners. Nevertheless, it was really important to get on them really hard before initiating a turn. Here’s a snippet of the day… ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-mxT4BasEHjo.html

@UOTDF 2 года назад

@@skulle haha - that definitely helps! Keep studying, mate 😊👍🏻

@manveerghuman5276 2 года назад

This was incredible, needed so much! We need more people passionate in racing.

@tissuepaper9962 2 года назад

Pretty annoying that it seems like RU-vid made you cut out the clip of Vettel that you were using to explain cornering. It's a fair use, dammit!

@frederickschulze8014 2 года назад

Around 20:00 when he's talking about braking... I'd have a slight disagreement here. Usually, it's much more important to time braking correctly than to quickly move from the accelerator to the brakes. Someone might spend 0.25 seconds coasting every time the go from the accelerator to the brake, but if they are braking at the exact right time every time, then that's much more important. If you can instantly transition from gas to brakes but you brake 0.05 seconds too late, you'll lose much more time. You can lose way more time with mistimed brakes than with slow brake transition. That said, if you're in autocross, you're constantly doing the transition so you need to be good at both. If you're on a track, the transition doesn't matter as much.

@seph95 6 лет назад

YOU SHOULD GO TO IUPUI In indianapolis! The only school for Motorsports Engineering in the USA. A legitimate Motorsports-focused Mechanical Engineering Degree, from Purdue University.

@Me-eb3wv 4 года назад

Woag

@ANDERSON110 11 месяцев назад

Excellent lecture! Thank you so much for recording this.

@midslam 10 месяцев назад

The most in-depth, informative video on weight transfer I've ever seen. And I've been studying the craft for some time now. Thanks mate, much appreciated. Will allow me to dial out some minor issues.

@Nevertrustalawyer 3 года назад

I ride sport-bikes, and I found this interesting. About 5 years ago, I started trail braking, it compresses the forks, shortens the wheelbase and helps the bike turn. I also ride snowmobiles which are three point vehicles and no front brakes, but non the less, I enjoyed learning from the video, thank you!

@iisszzll 3 года назад

this helped me a lot trying to understand weight loads and relative angular moment understeer, honestly I can't thank you enough, this is a pure gold mine! I will be recommending this video for sure

@JeffEmbracedDC 3 года назад

Great lecture for on-road/street/auto-x racing. Would like to see something similar for offroad racing.

@brendenbanks9293 4 года назад

@Andre Marziali - @1:15:00 or so you start talking about frequency. I was thinking "this guy is my spirit animal" as I've argued many of the things you discuss up until this point in the video. Frequency calc are a static look at how relatively stiff one end of the car is vs the other. Useful for determining roll couple and load distribution in roll by considering corner weight and motion ratio. Looking at a car with ONLY springs on it like yours, how else would we know how well balanced it is (neutral)? Keep in mind, I do understand what you're saying, that in racing flat ride doesn't matter! true! you can put a stiff front spring on the car and a soft rear spring with a big rear sway and the car will still be "neutral handling" but have poor pitch moment over bumps. However, the way you phrase it is such that the static calc isn't useful at all and that's where I diverge. Without this basis for making car changes, you'll be completely shooting int he dark and working purely in terms of trial and error. Then using things like sway bars and alignment to handicap what is probably poor spring rate choice to begin with.

@Andremarziali 4 года назад

You have a fair point - I didn't mean to imply the freq calcs were useless, it's just that they're far less intuitive to me than understanding the roll resistance at each axle with respect to understanding handling. You're right though, that without considering frequency, at least as a means to compare axles, you could end up with counterproductive compromises of springs and sway bars. I'm currently re-working and expanding this lecture into multiple, more detailed lectures and will definitely address your point there. Thanks for the feedback!

@brendenbanks9293 4 года назад

@@Andremarziali Thanks for the reply. Looking forward to it! It's just a constant battle when people complain about under-steer in the BMW world especially. Then when you try to exemplify for them with basic static calcs that it's likely they are heavily under-steer biased they want to dismiss the math as not practical in real world "because race car." Well have fun under-steering then!

@Luismercado0862 2 года назад

Excellent video, make me remember my college days. Im a mechanical engineer and participate on amateur track time events and tune my own cars. No matter if the person go into racing or not, but it helps to avoid car accidents for daily drivers.

@claytonep797 5 лет назад

Wish i have a teacher like this....

@soraaoixxthebluesky 4 года назад

54:12 this part sounds counter intuitive. Then why in a race car, especially in F1, which is a clearly visible with an onboard camera we can clearly see that they ultilized a anti-Ackerman effect which give and extra slip angle to the outside tyre during a turn. This only possible with one explanation, the outer tyres have more grip than the inside tyres.

@Andremarziali 4 года назад

Indeed you're right, the outer tires have more "grip" in the sense that they provide the larger share of the overall cornering force, but their grip coefficient is lower. In other words they generate more cornering force than the inside tires because they are more heavily loaded, but they do it less efficiently than the inside tires.

@motojojo_ 2 года назад

Great lecture, lots of food for thought. Now I can try calculating the improvement of polar moment by shifting weight around 👍 (yeah, I make that sound easy but I know it's not 😅) Guessing the video at the end was the legendary one of Ari Vatanen (this one ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-cxDz0Z066NI.html for those who're not sure).

@connoreddy8585 Год назад

My entire vehicle performance module in an hour and a half. Amazing lecture

@cesarpalmos8235 2 года назад

This randomly got recommended to me, I'm glad I watched, I was able to instantly apply some of theory and achieve consistent, faster, cleaner lap times.

@BeReady726 2 года назад

I modified my Camry subtly (looks stock) to make it handle very well. It was funny going flat through a corner at 80 mph to freak some tailgater out and cause them to retreat. Lol

@Kurisu_KASutoro 2 года назад

this is what i like if i go to schooling 😁😁😁 racing school

@Powerslide15 2 года назад

If only more people would take the time to understand the physics of driving a car. So many accidents could be avoided.

@Xerxes1337 4 месяца назад

It's crazy how the basics aren't taught more in driving school. You would expect operating a 1.5 ton machine would require more technical knowledge than "speed bad, slow good". Now everyone blames speed when a high performance car crashes on a straight. No bro these cars have high performance brakes as well, the dude just can't drive. Not saying speeding is good on public roads but somehow people get into accidents at low speeds as well so something is missing.

@Ozzy3333333 2 года назад

At 53:00 weight transfer in a corner is not "vertical load" on a tire as your table shows. Vertical loading (from downforce )of a tire generally gives more grip with more downforce, this is good. When a tire is near the limit of grip in a corner, adding stiffer spring on that tire adds more "lateral loading" (not vertical load as the table shows) that reduces max grip (slip angle is now excessive for that tire) (BTW, I have that "tune to win" book). Good video, thanks for sharing. Best book ever for my 4 decades of racing, "the soft science of road racing motorcycles", only $5 used, it teaches high speed thought, let that sink in for a moment. Motorcycles require keeping track of 5 things at once, where a car is only two, this makes it simple to use the books technique for cars, it has helped me win many many races by being consistently quick lap after lap.

@Ozzy3333333 Год назад

Reinforcement of my statement, you want vertical force and not lateral force. Drag racing wants all the force vertical they can get, a perfect wheelie transferring all the weight to the rears. TF is not 11,000 HP and the rear wing can be setup to generate 8000 lbs of down force, why, more traction.

@Andremarziali 4 года назад

Please sign up at physicsofracing.com/ if you'd like to be notified when the formal course offerings become available. These have been greatly delayed from what I was hoping for, but still in the works. I'll send emails to everyone registered on the website when new content becomes available.

@kevinm.n.5158 2 года назад

It's almost summer 2022, I signed up though hopefully by the time it comes out I'll have some money to spend.

@Andremarziali 2 года назад

@@kevinm.n.5158 sorry it's taken so long - I did end up getting distracted by things ramping up in my day job. The good news is when I do get to making it, I'll likely release it bit by bit to RU-vid for free.

@z50king29 2 года назад

Ferarri uses Comic Sans in their slide show?? Yikes

@captain_context9991 2 года назад

Americans "building a race car" Chopping down a European car with an angle grinder, and tuning the engine.

@RhodokTribesman 2 года назад

Are you saying a stock M3 would be faster than a stock M3 with the furniture and sound deadening removed?

@BeatTheD3viL 2 года назад

I should have watched this video earlier. Would have saved me repairs on broken passenger side control arms, twice.

@philips3825 2 года назад

RU-vid algo at 2am: You should watch this. Me:

@PopcornSticker 3 года назад

9:59 is that where italians got their flag from right? these guys love racing

@ferchuu9 3 года назад

underrated comment

@PopcornSticker 3 года назад

thank you my man

@excrubulent Год назад

As someone who already knows a lot of the physics, there were some important insights here that I hadn't ever considered, especially about the transitional stage where you're trail braking and releasing the brake. It had never occurred to me that because the front springs are still compressed as you release the brake, you're still benefiting from the increased front traction and the lack of braking. That's why that instant of release creates such a strong turn-in, and it's really important in off-road racing where understeer is a big problem. Getting the timing of that brake release right is how you get the Scandinavian flick to work as well. I'd love to see an expert discuss the specific issues as they apply to off-road racing. There are a lot of questions I have particularly about spinning tyres and side bite on a loose surface. Contrary to tarmac racing, sliding is much faster on loose surfaces.

@g0k4y_ Год назад

Came after that Nascar wall grinding moment

@Pilsnor 2 года назад

I hope its okay that i use this as my secret source/bibel of tuning cars in gt7, i trust that you will appreciate me sending some gt7 traffic this way, this not self promotion, but i would like to start having this playing over my mic while have nothing to say or a knowledge gaps, but first i will play the intruduction and tyres, and hopefully they come over to see the video and learn something, trust me this has suddenly become very rellavant to Gran Turismo, hopefully i will have honour of the teacher himself checking out my “homework” here on my personal channel 😊 hopefully you see this some day where you really need it like i needed your video IN many ways 💚

@theguythatweird 2 года назад

I'd like to imagine the parking lot for the lecture building being a car meet

@straight6604 3 года назад

Really interesting how something just based in physics can be subjective and people can have different opinions. It happens with lots of compound parts that are hard to measure. I learned a lot, disagree with some, and note how he contradicted himself a few times.

@matthew6443 4 года назад

Can someone explain why he says trailing braking and pitching the car forward, increases weight on the front tires and gives you more grip. But then later on says putting more weight on each tire reduces the grip in regard to cornering body roll? Seems to contradict each other

@Andremarziali 4 года назад

Hi Matthew, thanks for asking this. The difference is that in trailbraking, the forward pitching of the car generates an additional downward force on the front tires, but the actual location of mass within the car doesn't change, so there is additional grip force on the front tires WITHOUT an increase in the mass that the front tires must move around the corner. Conversely, adding actual mass on the front tires increases the grip force but also increases the force required for the front axle to steer the car, as there is now more real mass to steer around the corner. What's worst is that because tires are less efficient in grip as they are more heavily loaded, the added grip force and added force requirement from the mass do not cancel, and the overall grip decreases. I hope that helps. The key is the difference in the origin of the extra downward force on the tires.

@gtrstreet 3 года назад

@@Andremarziali while your explanation in the comment makes perfect sense (thank you for that!), I'm interested in a slightly different aspect of the original question. Why does transferring load to the front during trail braking generates grip, but transferring load to the outside tire while cornering takes away from the available grip?

@Andremarziali 3 года назад

@@gtrstreet Thanks for asking! The distinction is subtle. The fact is the rear-to-front load transfer that occurs under braking does decrease the overall available braking grip in the same way that lateral weight transfer takes away from cornering grip. The mechanism is the same - the front tires take more load and work less efficiently, the rear tires take less load and work more efficiently, but since the front tires are taking a great fraction of the braking force, the overall braking grip declines. Now, that is a decline in grip in the BRAKING direction - i.e. longitudinally. Laterally, the mass the front tires need to push in the cornering direction hasn't changed, but their normal force has increased, so the available grip in the front increases for lateral or cornering forces. Similarly though, there is a decrease in the normal force on the rear tires leading to a decrease in their available cornering grip. The overall result increases front axle cornering grip and decreases rear axle cornering grip, leading toward oversteer which can be used to cancel typical corner-entry understeer. Hope that helps!

@gtrstreet 3 года назад

@@Andremarziali Great explanation, thanks a lot! I revisit this lecture from time to time and I find it immensely helpful. Now I just wish you had a lecture on damper adjustments as well 😄 I find the transitive behavior of a car during cornering a bit counterintuitive.

@Andremarziali 3 года назад

@@gtrstreet Working on it! Stay tuned.

@Hamoae 4 года назад

Wow! I am not a race driver (not because I do not want to) but since I started playing F1 in PlayStation my interest to learn more about the physics of racing has not done but increasing and increasing. I really enjoyed your lecture and I am hungry for more...

@aryanmishra5591 3 года назад

Cool! Can you suggest any idea other sources like this.Gems like this are hard to come by , I also want to learn Vehicle Dynamics in an intuitive and fun way rather than a bunch of derivations.

@punicharana 2 года назад

Any sim racer here?

@2gnospam 2 года назад

Great video! With respect to the interaction of camber with caster during steering, I think (e.g. not 100% sure) that you have to model the KPI (king pin inclination angle) effect.

@MementoVita 4 месяца назад

Intro-0:00 Driving Theory 101: Intro-5:39 Car Tires-6:51 (Traction Budget and G-Circle)-9:45 Racing Lines-12:07 (Movement Progression)-15:35

@wessen666 2 года назад

trying to get into gran turismo 7...know nothing about cars nor physics, but i think i understand a bit more now on how cars work

@theandrewglenn1 2 года назад

I don't know how to speak or interpret physics, but the small racing experience I do have became my translator. What an AMAZING lecture and thank you for putting it on RU-vid

@_entrxpy 5 лет назад

I'm an automotive engineering student in Modena and I don't know why you aren't my professor yet ! Please come here and teach us some lessons, that would be absolutely awesome!

@Andremarziali 5 лет назад

I'd love to! I can lecture in Italian too ;) I'm seriously working on putting a set of lectures together that would make a nice short course at the university level. Happy to do some as guest lectures if there's interest.

@_entrxpy 5 лет назад

@@Andremarziali parli italiano? ancora meglio! if you really would be forward to do this, i can ask my professors to see if it's possible to do something! i'd seriously do anything i can to make this happen

@Andremarziali 5 лет назад

@@_entrxpy Si! Non molto bene, ma parlo Italiano - sono Bergamasco. Feel free to email me if there's interest. I may be in Europe this summer for some racing so maybe something could work out. andre@phas.ubc.ca

@exemch4826 Год назад

this would be the coolest class to take

@ron5948 3 месяца назад

Let me gouys u ones uungligns give a tip only that one she said KEKE, so we have 4 wheels independenlyy and a tire that is very slippy sidesways ehrtcanwrdo? ??? Ye high torque on each veeeeery quick response so bo ice farbauge KEKE

@babatu6717 Год назад

1:17:14 "frequency thing was developed for passenger cars it is a transmissivity issue as far as i can tell" It matters like life-death difference in any car on a poorly built road. Humps that align in a sequence that resonate with any of your car's axles in a corner will show you what it's all about. Try some former soviet block country "highway" at big speed but be prepared (have your will written and signed beforehand). There was a police released video on YT from a crash scene in Hungary where two boys in a Huracan filmed their accident. At over 300 kph the car hits the humps (not even in a bend) - they flew off and died.

@bolt5564 2 года назад

Thank you for explaining the difference between the actual equation for friction and the simplified equation for friction you first learn about in physics.

@ron5948 3 месяца назад

Tolookinto whether 4 sided ground effect like thingy makes sense 4 point for each pssht no sidrd ron bc lets u drasticall psssht.... ???

@jspeed04 2 года назад

One of the best videos on both racing and physics I've ever come across. I've learned so much in this lecture. I mean, wow. Thank you.

@KILLERPOLECAT 2 года назад

Great lecture. I'm sure the final video can only have been Ari Vatanen at the 1983 Manx International!

@rudysuarez7670 3 года назад

This is a must watch, applying these concepts on the track and the backroads. *QUALITY*

@qwertykeyboardwarrior Месяц назад

going to school on youtube is awesome. i love being able to rewind the teacher and play it twice, i also get to smoke during a lecture, its really under rated. i bet more people would go to school if there were classes with smoking lol

@davidjereb 9 месяцев назад

1:31:56 As soon as you said "cattle grid", I immediately knew you just showed them a clip of Ari Vatanen scaring the shit out of his copilot.

@jwinut1 2 года назад

nice vid for GT7 tuning :)

@alexcr5276 2 года назад

Part of the reason I love racing so much is because of all the science, physics and engineering that goes into the sport. Thanks for sharing this lecture! 👏🏼👏🏼

@maydaygaming3953 4 года назад

Thank you so much. Iv shared a link to this in the grt youtube discord im in. We play gt sport and i hope we can translate this info to better lap times.

@astro6393 3 года назад

Nice im here from GT Sport too.

@joao_13_08 Год назад

'and with wreckless use of an angle grinder, ive removed about 1000 pounds, from the car' lmfao im gonna love this

@davidbutcher1105 Год назад

Where it comes to race car set ups I have a saying that I feel sums up the process and goal: "In the religion of auto racing the tire contact patch is God and everything you do must be in service to it. Worship false idols at your peril"