Making a Custom Multi Link Suspension / 5 Link - E55 ASL Part 12
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- Опубликовано: 3 окт 2024
- The multi link suspension is possibly one of the most difficult suspensions to get right, in terms of geometry. Here's how it went
E55 ASL Playlist: • Project E55 ASL (Actua...
Suspension Geometry Video: • Suspension Geometry - ...
Instagram: / shehryar8215
I am member of a Formula Student Team and part of the suspension department, and I really enjoy all of your suspension videos, because they are really detailed and almost everything about your suspension matches about what we are running in our Formula Student racecar. I use your videos to better understand the way suspensions are designed. Reading the book is so difficult and usually I have to read one part several times to understand it. We are actually running a pull rod Suspension with longitudinally mounted coilover dampers, but we are changing to a push rod wank-heave system for fully adjustable anti roll settings next season. thanks for your inspiration and motivation and greetings from Germany! Georg
Hallo Georg, in welchem Team bist du denn unterwegs? Grüße aus Stuttgart
Bodensee Racing Team, UAS Konstanz bist du etwa beim Rennteam?
Engineering student in internship in Stuttgart here, that's what I wanted to say, this car reminds me so much of the formula student in our school!
im working in baja sae from brazil, and working o my own car! This video put in use every thing we lean in class
Me too ahahah suspension department in an Italian university
He has the spirit of the true privateer. He's building a high performance car using the minimum of tools. His science and engineering is spot on. I'm not sure why sponsors aren't air dropping tools and parts on his doorstep. His videos should be sponsored by Lincoln electric, Dewalt tools, metal supermarkets, Michelin tires etc...
He'd be the perfect candidate for a 3d printer, cnc router and cnc plasma cutter. But I enjoy his lower tech every man approach to the build.
Dude!! You inspire me to much. I've always wanted to do something like this. Keep up those explanation videos. They are so helpful
This is currently my favorite thing to watch on RUclips. Keep the videos coming man
project binky
@@michiage2709 Project binky is so cool too, but SK8215 make a video about all the rear suspension, and project binky is the same lenght video for a couple bracket is different :)
same here :) can wait for next episode
One of the best build video series on youtube for sure...
Don't forget the rx7 cosmo build by aaroncake!
Forget the area51 raid. I wanna raid this guy's mind. Genius at worst, can't imagine at best.
Genius at work...he knows everything in details
U wait till his workshop, progresses, and his skills become more inline with his knowledge.
No disrespect, He is ok on the tools. Ok. But his knowledge and comprehensive, conceptual understanding is orders higher.
Fitter&Turners or Boilermakers be watching some of this like, W.T.F... What the hell is he doing.
And thats ok, thats from an experts opinion. I ever thought thought u were getting pretty handy at your job, until u had to work with one of the old fellas for a days and be like .... whut!?! Why didn’t I think of that... That genius. And so simple...?
Great job.
I'm very happy to see a youtuber with a solid understanding of engineering principals.
So many build channels spend weeks chasing their tails over much simpler designs.
Unbelievable! And all of this in your home garage. I can't even build a simple bed and this guy is developing a race car 😂 I love your episodes. Keep going and greetings from Germany
At 15 min into the video... I could understand roughly 50% of what this video covering so far.
And here I thought I was getting better at my DIY skills during Covid.
This guy brings DIY to another universe...
Respect.
You are a very clever gentleman for sure! Enjoyed the explanation of the multi-link rear suspension as I have never really understood how these worked.
I love watching this after I watch those dumb "build" compilations of people bolting on air intakes and coilovers lol. It really puts into perspective the real engineering behind race cars. Truly epic what you are doing!
Exactly!!! You speak my language!🙄 Those "build" videos really makes me fucking cringe😬😕
I never know what to comment on your videos as I'm absolutely amazed and simply speechless, no word of a lie.
Your knowledge, delivery of technical information and implementation is simply amazing.
Seriously can't express how greatful and appreciative of your efforts to share all this and the sheer inspiration you are.
By default I like your videos before I even watch, keep up the amazing work.
There are sooo many people on RUclips loads of car channels but 'YOU' are serious top dog man, genuinely sick!
This is like day and night compared to your first self built car, it will look insane, once its finished!
The laser check is so precise I like it, and you nailed it, so hard to do this kind of perfection! Big up!
Dude, you're inspiring future Engineers, including myself. Currently i'm working in a FSAE team in Brazil, in Chassis development, side by side with the suspension part. Keep it up man!!
Thank you so much for all the work you put into explaining all of these complex suspension geometries to us all! You do an absolutely fantastic job! Second to none! It’s so refreshing to have something I don’t know very well explained so clearly with visual demonstrations of exactly what’s being described! Keep up the great work man!
Yours is the type of channel that makes RUclips legendary to watch for true petrolheads. Building/tuning your own car :)
I love this series beacause first it involves a v8, and second he is using metric units. Love it !
The whole testing on minimising your bump steer on the rear was inspiring. I can’t wait to see the results translate on the track!!
Bro! You wanna know what’s insane??? Your brain brotha! Your a freaking genius!!! Hands down this video really explains how your mind works! I will now go and start watching your videos on this build from the beginning. Found my new favorite RUclips video!
Can't wait for next vid! Not only is it a great effort to build something from scratch but to also document it and explain everything, to give so much of your time is just humbling and inspirational. Keep them coming! ❤️from Australia.
How does this guy only have 31k subs? Amazing stuff...
I love the content but for alot of people its too much information (I love it), video too long (for those with attention span issues), and people want to see a completed project in 3 parts lol
Most likely NOT actively marketing his channel to the extent possible. He's too busy building a car instead of researching self promotion.
Getting some real project binky vibes, great job.
What software do you use for suspension geometry?
oh wow ive learnt so much in 24 min than years of goofing around on my own, thank you!
Respect from Nigeria bro, been following you!
where did you get the internet connection ? i tought you guys were starving.
@@yolbulucu
Hahaha...😂🤣 Long story bro!
Keep in mind though, my country is known worldwide for high rates of cyber crime. You keep asking questions like these, your curiosity might land you in the cruel hands of these cyber scammers. DON'T SAY A NIGERIAN DIDN'T WARN YOU.
Ohhh, and sundance kid, you definitely need internet for cybercrime...now you know!🕺🏽
@@autojando7223 hehe you are funny, how is it in Nigeria?
I remember the merc build, good to see you back as your work is excellent.
Building a car as we speak and your videos are a true help
How did you gather soooo much knowledge!?😮 I mean you even have good electronic knowledge since you made your own ECU.
Kau, how do you know everything he says is going to work? he could be just talking your ear off OR he could be a genious. Kind of like Kyle the aerodynamicist, if kyle was so good at it he wouldnt be making youtube video, he would be working for an F1 team. i get th feeling this car is going to need a huge rear wing to compensate for lack of rear mechanical grip. it's a great build tho, i am enjoying it
I think he once said he was studying engineering. Other than that a LOT of research and he currently races, talking to other tams a the track can teach you a lot.
supersevenn kyle now work for an F1 team, that’s why for the lack of contents
@@supersevenn Maybe he is. But maybe he knows what he's talk about. Regardless of anything, his work is still damn impressive.
supersevenn Hah you idiot Kyle joined Mercedes F1 as an aerodynamic i think 1-2 years ago. You are a real shithead, try to be as good as other people, get good arguments and then start talking shit about them!
Great Videos. You are extremely talented and knowledgeable. Thank you for sharing.
I am here because an EV group on Facebook, this video really help! thanks for sharing
Very tricky to get right. Few years ago I was hillclimbing a standard-ish road spec car, but it wasn't a conventional suspension setup (Rover Hydragas). Changed the entire thing to coilover suspension, made wishbones and rosejointed as much as I could. Left the front geometry fully adjustable and it was a complete pain in the ass. Great job you're doing there
So inspired! Can’t wait to get to that point on my Willy’s Jeep build!
Beautiful work, straight up art
Really????? with wire feed welding on thin wall tubing?!?!?!?!?
My brother look at the perfection of the geometry, It's eye candy
The Mathematics are noteworthy, however for your Brother and Anyone around this land locked missile need to be safe or this could look like a spilled box of tooth picks, The welds NEED be Air frame quality.
Simple as that and I defy anyone who chooses to argue my point.
Have you heard or GTAW (Heliarc) welding method?
www.wisegeek.com/what-is-heliarc-welding.htm
Clear enough to you?!?!?!??!
@@robertsears2762 who hurt you?
This guy is a diy hero, you can build hi tech quality stuff at home if you research and apply yourself
There's a phrase 'jack of all trades, master of none ' you seem to be a master of all!
G'day from West Australia,
I Am liking what you are doing, from an Engineer's point of view🙂 3rd gen 38yrs trade life thus far.
I wait for your videos and click on them the minute I get a notification lol thanks for your very talented work!
I love that you put an amg engine in it and not an LS. Big vintage Mercedes car guy and after I finish my 280sel 4.5. Id love to swap another older Mercedes with a 6.3 c6s engine.
This will be done and then the subscriptions will catch up. Can't believe how fast you are building a car.
im gonna be lazy on this one, and then creates a whole rear suspension, damn you are badass smart
Man you are incredible! Keep up with this amazing project! Greetings from Brazil
I'm speechless. This guy is awesome. 👍
Ive been watching this build since you started making the chassis and i think its awesome and its turning out amazing
that channel deserves millions of views.... awesome content dude....
Respect from Kurdistan man I really enjoy this!
My Audi A6 Quattro had that suspension in the front. Handles very well
I can't wait to see it all velded. 😅 Love it man! Can't wait for you to finish.
Drive shaft loop would be a quick add that would ensure your safety. Aluminum won't do much to stop a driveshaft at speed.
Canadian tire needs to sponsor you!
Love the whole series. I was surprised though when the heim joints on the rear suspension were oriented in a manner that you convincingly argued against for the front suspension. The joints on the spindle made sense because of reusing the holes but the orientation of the joints on the frame were new and went against your orientation argument for the front joints.
Great job man, the laser test is a bright idea as well
Great video on multi-link rear suspension. I do not understand the implications of all the design features but it should enable your to take corners at higher speeds. I notice you are using triangular architecture for the frame of your car body. Fascinating. Keep up the great work.
Good stuff. For the drivesaft just bend one U-shaped tube over the saft and weld it to the framerails. That tubing acts as sort of blastshield if saft gets crumbled or break.
You my inspiration always looking forward to a new video,ive learnt so much from your videos.Keep up the good work.
Nice job & well detailed multi link design. Push push !
Very impressed with your knowledge I look forward to your future videos.
Your videos are very good and informative. Im currently building my own race car based on the lotus 7 but with a lot of different set ups on suspension
Your suspension is an adaptation of the AMG rear uprights to accommodate a widening of track. So why did you not use a negative scrub radius which takes load off the arms and makes the suspension more stable under acceleration and deceleration? Your rear hubs and bearings will have a short life with the large tires and forces of geometry and 50mm spacers. It may be wise to modify to achieve a negative scrub radius to achieve lower load. Widening the axles is relatively simple and may have had more benefit than you thought.
He touched the subject on another video, he went with a positive scrun radius because a negative gives very little road feedback and very easy to spin out with.
Feedback from rear is not possible, so that makes no sense .negative scrub keeps the rear tire toe to remain the same.
Are there any possibilities of the joint going into bind, or contact the sides of your brackets, since you used no high missalignment spacers with the rod ends? And fix that center welded driveshaft. It's going to end badly. (Edit). A sheet of aluminum trans tunnel is not in the same league as a production car steel tunnel which has stampings to increase strength and usually supports and/or bracketry. I've seen the aftermath of a driveshaft that letgo while towing a car on a dolly and it completely ripped through the tunnel and basically vaporized the whole console. This was in a 450 sl which is not thin metal at all. Please send that driveshaft to be balanced. They will tell you they won't do it welded in the middle then make it correctly for you.
Awesome stuff! My question is with the push-rod - based, suspension in the rear (actually front and rear) have you considered adding a third coilover to dial out toe-out during braking? Formula cars have been using this technique for decades. Seems as if this could not only help maintain the amount of on-throttle track-out toe-in you're aiming for and help provide consistent aero-loading in all situations.
Fantastic job on the video ! Had to leave a like ! Nice details and images , very impressive ! Keep it up bro and have fun !!!
KEEP GOING THIS WILL BE SO WORTH IT AT THE END
Can't wait to see the next part!
Great video, really interesting stuff. The only thing I would suggest is a driveshaft safety loop. Sheet metal won't do much to protect you from a driveshaft at high speeds.
Beautiful... Thank you for sharing!
Did you check the bump steer for the full travel of the suspension? If you have little bit of toe-in on compression chances are you have little bit of toe-out on extension. So when you accelerate the rear goes down and you get toe-in which adds stability. But when you brake your rear goes up which could mean you get toe-out which means instability. It is possible to get toe in for both directions if your steer arm length is correct though. I'd imagine you did check that.
Yeh, making the toe link longer gives toe in in both directions. I ended up setting it close to 0 anyways. Will be running about 0.3 degrees static toe in after the final alignment, so its always going to remain positive in all positions
I was gonna do something very much like this yesterday, but then I took a nap.
Correction: under acceleration the propulsive force is applied at the axle height on the knuckle.. You tilted the steering axis to help pointing it toward the contact patch (which is valid to minimize the braking force leverage), but doing so it increased the leverage of the propulsive force (which was allready increased by the wheel spacer). This will tend to toe in under power (by compliances).
Been waiting all week for the video! Cooooooool!
Amazing project I am following the progress intently. I would love to see you design and build your own uprights on your next project.
i cant stop watching!
The pick up points on the chassis for this suspension need to be triangulated with the chassis. Will you be coming back to do that at some point? What I am pointing out is that welding the chassis pick up points mid tube is a weak point, the tubes are easily bent by the forces applied. Triangulating those spots spreads the suspension loads to stronger points on the suspension, usually the intersection of other chassis tubes.
How clever are some folk..... awesome!
Awesome video. I'm so excited!
You are the man! Love your videos.
WOW! Very fast and eficient! keep it up!
If you have issues with lag, add a compressed air tank/line blowing into the exhaust.
Respect. Keep up the great work & videos.
what platform you use to simulate ?
wow!
Cool build dude :D nice idea turned into something rly good looking. hope u will actually get to race it.
Sick!!!
Well done mate love your work. You explain everything so well. I'd love a copy of your plan its nicely done.
Kingpin inclination is the term you referred to I believe....Nice build.
Really good and interesting videos!
But...
Atleast weld in a safety loop for the driveshaft, i understand you're in a hurry but the outcome could be way worse than that extra time spent, be safe! :)
Man,.. you are awesome.. i am a crafty Guy but you put me to absolute shame!!! I live too see your videos because I am dreaming of something similar
That weighs less than a Suzuki samurai or Tracker. That’s awesome
Great video again. Really well done. What software are you using for the kinematics?
Also just a comment but the clearance between halfshafts and chassis looks quite close when accounting for suspension! travel!
It looks like you could have some binding on the upper links if you hit a big curb.
this video is such a gem! Instant subscribe ;)
*BRILLIANT*
*Too bad you don't have 2 electric rack & pinions laying around*
*Four wheel steering*
*They must be indexed and synched to track properly, and
*that's usually done with modules to a BCM, right?*
Love your work mate. Wish you were in Australia so I could help with the body.
Body building is a trade in Australia and that's mine
Nice video as always. What programm did you use to simulate the multi-link suspension?
I believe he uses ANSYS.
You could even use fusion 360
awesome, you left me speechless
These videos are insanely awesome, loving the progress and your in depth knowledge. Would you be willing to sell cad designs once finished so we can build one too! I think something like this with an OM606 diesel and holset turbo would be a fun project!
I have a question . In the books it sais that when designing a car you should start from choosing the tyre size for the project. But how exactly do you decide on the tyre size what is the correct method ?
This is awesome, but if you ever damage the car you're gonna learn real quick why track cars have bolt in subframes separate from the rollcage and chassis.
I'd add some bracing to reinforce the square tubing you're attaching your links to and a driveshaft loop tbh
The laser motion is a GENIUS idea! But, How do you actually calculate the instant centers locations of a multi link? Since upper forward and backward links have different "planes" ....so the average of both? Or do you ignore the front links (lower forward one determines antisquat correct? That's most steeply angled so ) and just be concerned with the rear upper and lower links? Especially if the coilover is bolted to the rear lower link. One more question if I may, why did you weld the Toe arm at the aft of the knuckle vs at the fore? I've seen some factory cars with loooong toe arms at the aft (bmws, Mercedes...etc) and some stubby and short but its located at the front of the knuckle (porsche gt3). I understand the effect of the arm length on the toe curve but I never understood how the location of the arm effects how it behaves! Thanks!!
What software did you use to design the car and suspension geometry?