Suspension Geometry - Part 2 (Roll Center, Double Wishbone, MacPherson Strut)

Finally got done with Part 2. I know it took a while but the next video should follow soon.

[@CorgiTheCorgi]

Hired as a chassis engineer, still learning from KZbin. KZbin is simply amazing.

[@jackharper6746]

your speech doesn't sound scripted... but you deliver detail a high rate... respect!

[@gewow]

Man, this is an excellent video, honestly. I don’t know if you teach, but you should. Your way of splitting topics and covering them in a simple easy to follow train of thought is extremely helpful considering how complex all this is. Hats off. Keep up the great work.

[@daos3300]

as long as he's not teaching idiots to drive lethal homebuilt cars on public roads.

[@gewow]

Just because someone jumps off a bridge, doesn’t mean they promote that activity

[@zackj997]

As a visual learner, the graphics definitely make everything vastly easier to comprehend.

[@CASH-TO-THE-MERE101]

gewow 👑

[@coryman125]

I'm not normally much of a car person, but lately I've been playing a physics game about making cars, and the engineering problems behind making steering and suspension have really kept me interested. Found this video today while looking for better solutions, and it honestly helped a lot!

[@hasanimam3102]

What game??

[@swastikgrover3414]

yeah man what game??

[@lansiman]

i feel like I've graduated from automotive engineering academy just by watching your videos. i wish i could give you 1 million likes but until I'm able to do so you'll have to settle with one at the moment. thank you so much, you're really a car prodigy

[@MrSaemichlaus]

All of this is crazy helpful. I feel like a whole semester of study in a module could be replaced by a mini series like this.

[@dandoesathing2146]

Dude, thank you so much for going out of your way to help people understand these concepts, your videos are excellent! I'm building a small off road car and you've answered so many questions I had!

[@zzz11221]

Studying at Stuttgart rn, at the university which has been teaching car engineers since we invented the car. Yet this KZbin video explained it better than my professor.

[@martink20a64]

I want to say thank you. I had to watch it 2xs to comprehend everything, I think I finally understand why I want double wishbone in my track car, Please continue educating us...It is appreciated

[@DrVitalliO]

By far the most detailed and also easy to gollow series on suspention. Well done.

[@6Twisted]

I never realised suspension was so complicated...

[@1495978707]

6Twisted One of the biggest things I’ve learned in my physics education (I’m currently in a physics PhD program) is that everything has so much complexity that you can never really run out of it. Much of the art in the sciences is determining what parts of the complexity is important for the problem you’re trying to solve, and figuring out how to appropriately represent and work with it. As an example I spent a whole weekend recently just reading about and designing valve timing for a steam engine I’m designing. If I made everything constant, then it would’ve been simple, but making parameters adjustable means more complexity is involved. Similarly in car engines, until pretty recently almost all engines has constant valve timing, but then variable valve timing was introduced which means you need to be able to switch between cams, and even more recently Koenigsegg has developed a solenoid driven valve system for continuously variable valve timing, which obviously requires a huge amount of complex control system design. And I’m sure valves can get even more complicated if you really want

[@ungineer2480]

​@@1495978707 As electrical engineer and racing fan, I've always wondered why EM valve systems weren't introduced 30 years ago instead of sticking with mechanical and in the 80-ies the pneumatic valve [spring] system (Renault), given the advantages an EM based system brings: the speed potential it offers in combination with having a variable system when using software based controlling systems.

[@CmdrTobs]

@@ungineer2480 The amount of electrical energy required to energise a coil promptly enough is not worth it. The large engine and near unlimited budget and no requirement for reliability and marketing appeal has made it commercially viable for the first time on the koenigthingy.

[@burtvincent1278]

Excellent. Everything I wanted to know in one series. I was in a dilemma trying to install a 460 in a 54 ford and was about to install a straight front axle. Glad I watched this video first.

[@JSG1901]

These are GREAT videos. Thanks for taking the time to put all of this together. I think of myself as relatively knowledgable about suspension, but I'm learning all kinds of things. I really appreciate that you've gone to all this effort. You might want to talk to the Kahn Academy about teaching this stuff for them (admittedly, not exactly their cup of tea, but still). Well done!

[@ziggyfreud5357]

Once again dude. Super excellent vid. Top class explanation of what is quite a complicated topic. Excellent diagrams with simultaneous explanation. Thanks for all the time that you put in to doing this stuff. Much appreciated.

[@firemanfred9471]

Watching you explaining suspension-set up for race-cars; convinced me that you probably worked for a "Racing Team" and you were in charge of suspension set-up.. well done on your efforts... I race a Lotus7 kit-car and am having issues with set-up. Will watch a few more times and analyze my present set-up... Thank you, Durban South Africa.🇿🇦🇿🇦🇿🇦

[@BDMotorsport]

Excellent content and delivery, thanks again. Brilliant videos.

[@singleturbosupra7951]

I love these videos! Now I didn't quite understand everything on the first watch, but I'm going to watch again later and try to read this stuff from elsewhere as well, maybe I'd learn to understand it fully!

[@xfmotorsports]

Thanks, yeh some of these things are confusing to understand at first, but try searching it. Some of the other diagrams might explain it better.

[@ShaunHensley]

Also it helps when you’re able to make the changes and then feeling what you did.

[@WONMARK]

You, my friend and this channel are a blessing... Thanking you for videos such as these

[@TheNameIwantedWasTkn]

dude, every video of yours i watch is like having a lightbulb moment..good stuff

[@matthewdupuis232]

Another great coverage of the topic!

[@gabrielebertoli3766]

Your videos are the best explaining vehicle dynamics!

[@abhishekbanerjee2679]

Love the explanation in the videos with the animations. Really paints a good picture. Would you consider making a video on watts link suspension and independent with two links at the bottom. I am seeing these more on euro variants and watts on the opel astra but a video would be very helpful

[@brianjiao9211]

a really complete and detailed lesson for us! appreciated!

[@Amitkumar-ur2ly]

I am in love with these videos. It is very informative and very well explained. Thanks a lot for such video 😊😊

[@sammedshah9329]

what a excellent video! this man has explained everything very easily. PLZ post some more videos on suspension topic. We are expecting more videos on this in future.

[@dielaughing73]

Fantastic video. Makes it all so easy to understand!

[@jacquelineharshbarger3720]

Thanks. You helped me so much! I have some idea of what may be going on with my vehicle now when I take it in for a damage estimate. I have a 2008 Acura RL, pristine vehicle that is 12 yrs. old,low miles, I just bought it. Some goof backed into me with his 2019 Silverado (sticking out 6-8 inches, tow hitch). I was in the vehicle parked, he backed into me. I was reclined in the seat, with the visor on the windshield, surfing the web. I was jolted in the car. No damage to the outside, of course I have not opened my hood yet, hmm, not sure if any sensors were damaged either, or the steering column paddle driving, etc. before I knew about the wheels being turned and steering column locked - I let him leave. Well then I realized my wheels were turned and the steering wheel was locked when he pushed the front of my vehicle back. My steering is not returning to the forward position, and my 8 position, lumbar, heated seat moves every time I accelerate the car from a stand still position. All is good, I have two witnesses, and an officer reviewed the surveillance video, she found him in the casino, so I got his insurance information. Thanks for the being thorough in your teaching, so a laymen could understand. Now I understand how my double wishbone suspension works.

[@duster0066]

Superb. I learned this in book form 45 years ago. This video is very good. There is a boat load of math missing, but the content is superb.

[@robbiemurchison7845]

These videos are great! Packed full of useful info

[@ScottHolland0331]

Great series of videos. Thanks.

[@vikashseelam9752]

your video just saved from fear of failing exam. One day will meet you buddy thanks a ton. For the first time I found something reasonably usefull. Thanks a lot

[@TheYeahman34]

Very interesting videos!Please explain also the multi link front suspension in your next video.

[@ZiinokZzHD]

Thanks so much for sharing this knowledge

[@prajwalhajare7699]

Please make part 3 and add all the remaining suspension types. You really teach well.

[@big-time-dave5738]

Great video! Would be nice to see something on the differential equations and whatnot.

[@TheMadMagician87]

Great videos, thanks! Really look forward to part 3 on linkage suspension systems. My interest is largely in off-road racing, so triangulated 3 and 4 link, but if you wanted to cover other multilink designs, lateral locators like panhards and watts links, or more out there stuff such as Tatras swinging half shafts etc, that would be awesome! Thanks for the effort you put into these, very informative! Which CAD modelling software are you using in these videos?

[@rishavkumar536]

You do it awesome sir. the way everything is explained is something very few people can do. please make a video on rear h arm suspensions please. I will be waiting for that.

[@MrFifur]

nice crash. allso good info!

[@allaboutengines5125]

another good video, sir. you teach very well...

[@xfmotorsports]

ALL ABOUT ENGINES thanks !

[@CASH-TO-THE-MERE101]

ALL ABOUT ENGINES 🔥

[@seankile7580]

@@xfmotorsports Do you have a video on calculating anti squat geometry? I’m fairly certain it’s a different approach from anti dive.

[@engineersarkar9634]

Such a beautiful explanation

[@baldeaglegarage]

Fantastic video and explanation!

[@floringogu4975]

great video, thanks for sharing all this knowledge

[@pranktek6108]

Keep doing . You are a awesome teacher.❣️ Love from India 🙏

[@arunkumar735]

stuffy videos!these helped me a lot! Thank you sir!

[@FilippoMulas]

Great, very exhaustive video,thank you very much!

[@483972]

thank you for your time , very informative. appreciate it :)

[@divyanshsahu4381]

Damn! You teach better than all the professors of automobile department in my University. Please add more conceptual videos like this.

[@iheartmysquid]

really great videos i would like to see a bit on solid rear axle suspension ie 4/3 link watts and panhard

[@thinkerdoit]

Amazing video. You should teach this stuff. As a viewer i’d really like to understand how these principles compare to older technology. e.g. classic VW, or 70’s Porsche 911 or RSR. Particularly how the rear suspension works with a rear weight/engine car. Would you consider doing a video? I think contextually it would say a lot about how the high level principles were applied in specific application.

[@pankajsharma-lp2cc]

i love you, what a beauty these videos are . so perfect and so nice ,capable to graduate anyone. please keep making them.....

[@MrPunya000]

great video, nicely explained

[@djzar6188]

Thank you, this video was helpful for me. This stuff was really confusing to me until you explained it well!!! 👍

[@jasonjackson3114]

Fire 🔥. Well crafted videos. You deserve money and shiny things for this effort.

[@Nihil1st1347]

Very well explained, thanks a lot! Can You pls also explain the suspension geometry of torsion dampers as introduced for tanks by W. Christie and also used in many Alfa Romeo cars? There seems to be a benefit of that in order to keep everything as simple as possible.

[@pedroborges3617]

you're doing great man. love your vídeos to improve our project at college

[@49S13]

Best suspension video ever made.

[@louly3212]

Automation the car company tycoon game is where you can build engines and run them but also static configurations of the whole car which includes suspension and offers much better detail about the choices of suspension and their effects if i remember correctly, highly recommended

[@kodeshian1]

Oooh I bought that a long time ago when it was an engine simulator only, I'll need to reinstall it :)

[@YogavenkatanarayananG]

This is really awesome!

[@checolate9680]

It was very helpful. Thank you!

[@mahela1993]

Thank you.. I think yours is the only animated source for this information in the internet

[@user-cg8qx4sr6m]

you're the best!!!!!! top explanation!!!!

[@felipestreetboard]

Very good explanations dude, keep on with this

[@alexgotta3317]

perfect explanation.. just perfect.

[@vincentbarkley9121]

Terrific video. Thank you.

[@stevesloan6775]

Brilliant video

[@donavonbebo7906]

Great vid i like that you're tech and not BS. I have a delta-wing suspension on the rear of my C70 Volvo it's kinda rare can you explain how it works or doesn't work?

[@electric1534]

Great ! Good explanation

[@stevegivelas9769]

Wow awesome man Very informative

[@xfmotorsports]

Thanks !

[@AntaresSQ01]

So when designing this sort of suspension from what position do you calculate your roll and pitch centres? When the wheel is in the middle of it's travel? What order do you go about setting this up? Is the first step getting your minimum ride height, your desired wheel travel and then the wishbones? Great video, really helps visualising and understanding the concept.

[@peter.d.song95]

Excellent video. Subscribed

[@41ace39]

this guy is literally risking his life to teach us about suspension

[@sidewazemotorsports1529]

Great videos!

[@jyu5560]

this is very helpful, please make a part 3

[@vollcare4076]

Perfect content 👍 If I want to increase negative camber on a MPherson front suspension there are two ways: 1. Move the top/upper mounting point of the strut to the inside of the car (camber plates etc), let’s say by 10mm or 2. Push the wheel out at the bottom by installing longer lower control arms, let’s say also by ca 10mm What is the better solution and why ? Thanks a lot

[@edbuller8834]

fantastic video, thank you!

[@ahmedhashem4454]

as always, i'm speechless and don't know how to thank you

[@anidiotinaracingcar4874]

Fascinating

[@Driftuner]

yeah multi link and TTA/TTI explanation would be awesome bro!

[@bubbybumble616]

I really needed this, since I'm not a car guy and I'm working on making a realistic car for a game

[@yimjiwo2345]

really really thank you very much. It is very helpfull for designing our team's ksae(Korea fsae) car.

[@Matt-kr8de]

Fantastic video! I have a question for you: do you know a method to decide hardpoints on the chassis? Thanks a lot

[@Angelum_Band]

There are torsion forces in the front when you brake. Also there are torsion forces in the back when you accelerate. Yes it would be interesting to see a part 3 that covers that matter. I know it is not specifically for cars but some trikes use DW-Link suspension another subject to cover. I am pretty sure you can wing that.

[@peshhhiify]

Wow, keep it up, very helpfull!!

[@ajayv304]

Thank you and it's very helpful.

[@SergejKolmogorov]

Nice videos. Thank you!

[@aripapagianis8269]

This is an awesome video very helpful. I would like to see a 3 link trailing link would you be able to make a video on that?

[@thezaalls]

If the camber changes on the MacPherson are gained and then lost, could you reduce the lost camber by lowering springs and making the dampers shorter and harder? As the suspension is compressed you gain the camber but it is too stiff for further movements so you would not lose as much camber.

[@TheCraftyPig]

I feel back in school.. and I love it

[@glennbunch]

The line that connects the front and rear roll centers is called the roll axis. It is the imaginary line that the body rolls on when subjected to lateral forces to the center of gravity. When cornering forces build up, the body dumps more weight on the front end if that roll center is much lower than the rear one. This means a nose heavy car will understeer more. Having the roll centers about the same height will reduce this tendency. In my experience with five race cars in forty years, low roll centers cause more roll by the body pushing down on the tire whereas a high roll center pushes against the tire in a more sideways direction, giving less bite, but more of a tipping motion, especially with a solid rear axle.. This is why you will need much stiffer springs with a lower roll center. Also, now you will find that you generate more tire heat with lower roll centers and higher G forces too. All of this tuning depends on the cars weight and tire width etc. because if you max all of this out , even with 14 inch wide tires, you can quickly overheat them on a road course.

[@thomaswomack3888]

First let me say this was an excellent video, but I have some questions about the effects of moving the lower control arm pivot points specifically in a McPherson strut setup. What would be the effect of raising or lowering the rear pivot point of the lower control arm on the front suspension. On my subaru that point could relatively easily be shimmed to lower that pivot point some. Would that be a beneficial considering the car has been lowered some?

[@nagarajkulkarni3251]

Lecture was awesome...please make video on multilink sus

[@narasimhakasu9357]

which software you are using in designing the suspension?

[@NorthDakotaCarGuy]

14:18 .....i don't know what laws you have there but if that was me i would be in some really deep s*** XD

[@brodiescott2728]

ikr, seems like a automotive prodigy, then goes racing a homebuilt gokart thing on the road with traffic, no helmet and fucks someone elses car up XD pretty sure that thing wouldnt be insurable lmao

[@randallmason9687]

I live in B.F.E. South Carolina. We run race bikes/cars on the road for testing. Had some close calls with deer though!!

[@CASH-TO-THE-MERE101]

North Dakota Car Guy 👀

[@williamstryker6643]

with more steering angle, it might have been worse. steering moment and rim/tire deflection angle/moment due to terrain can overwhelm control arm load paths but this does manifest in the knuckle.

[@madnice77]

Hey sir, what's that design program you are using?

[@anidiotinaracingcar4874]

I'd love to see a video about other geometries, especially since I have a trailing arm on my car

[@POVShotgun]

14:20 lol wtf

[@williamstryker6643]

RIP frame...Lower points are moaning.

[@jute91]

very interesting thinking inside these videos. I am swapping suspension into my track car and I need to figure all this out on the same time. What program is this where you can test behaving?

[@sudeeppoojari9118]

Excellent video s..thanks a lot✌️✌️

[@tommye.s.2294]

YEEEEES! Been waiting on this one! (Y)

[@ericmichel3857]

Thanks for the videos they are really great! What affect would lowering the upper strut mount have? Aside from reducing the travel I am thinking it would generally help geometry such as a bit more camber, negative scrub, and possibly lowering the role center? I ask because i have a new mount that is about 5 mm lower and I was thinking that as long as the shock doesn't bottom out this slight change in geometry should be a positive effect in general, yes?

[@xfmotorsports]

5mm is a really small difference so it shouldn't change things too much. If your on the same shocks then yes the bottom out will change by 5mm. For the other angles you can go for a 3d wheel alignment. They will be able to tell you the exact camber, caster and toe angles