Racers Cornering in Slow motion | EXPLAINED
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- čas přidán 28. 11. 2019
- I explain the cornering techniques that MotoGP riders such as Marquez and Rossi use to go through a corner with slow-motion footage.
I also walk through some of the physics behind motorcycle geometry, and the chassis implication of each part of the corner. I explain: Body positioning, counter steering, trail braking, suspension range, motorcycle geometry, backing it in, tire traction, and throttle control.
Spanish version of this video: • Pilotos de MotoGP en c... - Auta a dopravní prostředky
I don't actually own or ride bikes but this channel is amazing thank you
Hey get on that shit man I didn't ride either but I am now
Now you have to ride
It’s never too late to ride whether You are freshly 18 or you’re 50 years old I’ve seen people start at 50 years old no joke and they ride every single day you can do it
Never too late :) I bought my first bike at 39, enjoying it thoroughly!
I got my first one at around 34 or 35, although I'd had friends let me take their bikes for spin. A few short years later, I've taught myself a ton of stuff about my bike, and now I'm starting a $3000 performance build out. It's a lot of fun once you get started!
The only thing I learned today is that I have no idea what I'm doing on my motorcycle.
you should probably like,, you know... like,, I mean,, like,, kind of... you know, like..
me too
May God forgive you. I almost choked on my cookie 🤣🤣🤣
Great answer, and problably this apply to most of normal everyday bikers, such as me and my neighbours, and still they know how to ride a bike!
😭😭😭😭
I need to watch this 100 times to understand it.
Ha ha ....I also
me too
you need to hit the track to understand it.
ya he doesnt explain it to well.
Its almost like trying to explain art....
Try it out for yourself.
I have spent thousands of dollars going to things like california superbike school and track days to learn these things and you are giving it out for free!! great stuff mate!!
Thanks!
Yeah but track time is funner
You've payed for track time and personalised feedback from instructors.
Those guys also give that info for free in their videos or for a small fee in their books.
P.S. But totally agree that Mike gives lot of greatly broke down info
@@adrianalexandrov7730 Haha Its a little different when someone can see what your doing wrong. Helps take what mike says and put it into practice
If get the chance go check out California Superbike School! Its so much fun mate!
I'm 15 years into riding and I'm constantly learning, if only videos like this existed when I started, might have kept it shiny side up more!
Phenomenal production value. Well done!
Thanks Yammie!
Holy shoot jammie pube you here!
Hope you won't crash your Daytona after watching this video.
Yammie here!
Jammy noob
I'm 79 and have seen many changes over the years, You explanation is top notch. I am in awe of anyone like yourself that can do all that you do. Be safe.
It sounds like you are still open to learning. That's what keeps me from day dreaming while I ride. Instead I work on being smoother in as many respects as I can.
It's really warming to see elderly people still passionate about their interests.
Hey,
Happy 80 bud!
Hope you still find time on the trail.
@@yashsvidixit7169 The body gets old, real desire stays young.
Very well done, and well put together. I did my final thesis on my engineering degree on motorcycle dynamics vs. wings of a fighter jet. People do not realize the beauty of so many factors working so precisely to give us results we take for granted.
@Peter Angles lmao
Did you come to the conclusion that gyroscopic forces on the wheels were not the main reason that a motorcycle or bicycle stay upright during motion?
@ Mo Mentum : I think I speak for a LARGE number just to say, wed like to see the final result...
I (for one) have already done a gyro-scope model attached to a pendulum... and it held position... at least suggesting VERY VERY strongly that a motorcycle is "self correcting"... in 90+ % of all other circumstances...
I'll only strongly urge you. "Print as you will." Because we will understand. ;o)
@@gnarthdarkanen7464 I want to distinguish the self correcting effects of motorcycles that are not due to gyroscopic motion and the forces in the tire when it's being pushed by the road. For instance, motorcycles with larger rake will more easily readily fall over. And the stability of a motorcycle at low speeds with the tires rotating slowly can still result in a stable bike.
@@pogtuber5146 Not sure what you're after, but I'd advise you to explore for whatever "as it is" and then try to explain it, rather than busy yourself hypothesizing so much now and then explore to find what you're hoping for...
Motorcycles with a larger rake... like choppers? They seem just as stable as anything else on two wheels to me... The dubious part is where their length is so far that you end up "fighting" to turn... and at some point there's a "break away" by which the gyroscopic forces holding the bike upright causes one or both tires to "kick out" of their line... and at that point the bike is out of control and can fall right over, but it's more like a car "braking away" into a spin out in my experience...
Otherwise, even at 5 mph, just a leisurely roll... I can stand or even jump on a peg or running board and the bike won't so much as wiggle out of stability until I purposefully push a handlebar...
BUT you do you, of course. I can only speak to my experience so far, and maybe you'll discover something... ;o)
I’ve been riding for over 40 years and the great thing with motorcycling is - ‘you never stop learning!’ Great video’s Mike.
You learn quick when you round a corner and there's a car pulling out or a patch of water.
Motorcycle racing is fascinating
It sure is!
Indeed it is, perhaps because a rider can make so much MORE difference to how a motorcycle behaves compared to a driver in a race car. Now, I hasten to add the 4 wheel race driver is no less talented - what I'm saying is a motorcycle rider moves their weight around as part of the process, and that's a highly visible skill. And because it's so visible, it's also possible to see which riders are doing it well - or poorly.
Ivan Julian car racing is 80% car 20% driver
Motorcycle racing is 20% machine 80% skill
@@ivanjulian2532 lol ok fanboy
@@conlosmorchitti5832 don’t be a prick
Riding for a few years, some of this stuff I happen to have been doing naturally. I had no idea why I used to. Now that I do, I'll be way more mindful and it gives me waaaay more room for improvement. Thanks Mike. Fantastic video. Fantastic content. Keep it coming my man.
I road WERA for years in the 80's. At 65 I still love carving corners. This channel is very good and truly explains the proper affects of hard braking, lean angles and acceleration. My Ducati V2 makes much of this easy, however the bike only does so much. Pick a bike that suits you and your riding style. Don't be afraid to lean beyond your comfort range. You will be amazed what you can do.(Make sure you are in a safe area to do this, void of cars, curbs and barriers) Most of my best learning moments were when I came into a corner way too fast, laid the bike over, kept calm, looked where I wanted to go not where I was going and I was woohooing all the way through. Next time I remembered that feeling and was able to increase my cornering speed. Good luck
Isle of Man TT racer: All we need is just a steel balls.
Ilham Syamsul “TT” titanium testicles 💪
Balls of lead
They leave their balls at home..
the size of watermelons!
We’ve all gone beyond competition. Once the world population went beyond 1 billion, competition becomes pointless. In 2020, If you make 1 mistake, you’re dead. It’s not balls of anything. IT’S CALLED OUT GROWING SOCIAL COMPETITION. The population is SO BIG nobody knows somebody has become world champion.
This has actually answered a few of my questions after my track days. And will probably help me improve. Thanks so much Mike.
Awesome!
I raced on lightweights back in the late '50s and into the '70s. Our narrow little tires and contact patch was some tricky negotiating to keep from 'tipping over'. There's a lot to be gained from learning to ride well in dirt track style to transfer to road racing. Super video, technology has allowed examining the dynamics like never before.
Thanks for the great technical explanation of different cornering techniques using slow motion, but I mostly enjoy how slow mo captures the beauty and skill of these riders of this extremely difficult sport.
1:11
Sauce
@@inexinferis7064 Witty
@@peterweller8583 Kylie Page
😂😂😂
Sameee wtffff
Driving a car fast around a track?: sport
Riding a motorcycle fast around a track?: art
Nah, they're both art. But mere mortals can learn to drive fast, while riding fast is reserved for the gods.
First 4 laps on a track day, I am an absolute hero in my own head, 5th lap people start lapping me, 8th lap I am in the paddock listing my bike on eBay!!!!!!!!!!!!
Cars/bikes it is both an expression. I will say this though. Riding a bike makes you more aware of road conditions. Things like micro climates, gravel, leaves etc.
if you ever saw senna with an nsx and loafers, heel and toe around every corner as if the car was an extension of his body... to each, their own. both sports are amazing.
@@brandonlewis2599 Tell that to rally and F1 drivers
The track I work at is an AFT. I appreciate how you cover all bike disciplines without dumbing it down too much.
That counter-steering technique has saved my ass a few times avoiding holes or debris on the streets.
This is the most awesome commentary on the physics of braking,accelerating,cornering that I have ever seen. You are a legendary teacher.
I have ridden for many years,not recently though. But I used to make a regular run back and forth from Brisbane to Lismore via the Burringbar Ranges for many years. Any riders who know this range will tell you how fast and flickable it is.
Some of the skills you describe I used, it just took you to explain exactly what I was doing. You showed me some new ones too.
True lesson only applied when you grab the throttle and ride for countless hours.
Training make it perfect
Oh no. Buyers must educate themselves before they go buying. Lots of dead people had bought the wrong bike and car. Salesmen are NOT your friend.
Daryn how true that statement is.
not actually true....the thing is , I've known guys who swore they were going to make it, rode like absolute manics on the roads, bought the best kit, never made it.
That's why engineers design bikes and you ride them! What a subjectively bitter comment, sounded like the science that keep your ass alive means nothing to you. No doubt in my mind you are one of those pro-Trump goons! Please correct me if I'm wrong!
Training a wrong lesson won't get you anything tho
If you’ve gone in too hot on the corner & your going a little wide, and the exit looks as though you are going to be too wide (off the track) coming out.
By applying a light rear brake mid corner, compresses the rear suspension enough to alter your steering geometry by a couple of degrees helping you turn slightly tighter. (Preventing the possible off track exit). Saved my bacon a few times.
V King isn’t it more to do with increased rear tyre slip allowing a tighter turning radius?
@@williamsandbach9190 Not so much. By dragging the brake, you are slowing the bike down by small manageable increments to keep the bike stable and not overload the front. Slowing down lets you turn in faster and harder at the apex. It can bite you in backside and lock the wheel up, causing at best rapid increase in heart rate and at worst, get yourself catapulted off the high side of the bike. Not. Fun.
It's funny because that's what's known as trail braking, which we do naturally in our vehicles, but it's not as natural on the bike.
William Sandbach ... Light touch just enough to feel the rear squat (not so much to slow it down), front lifts minutely before repression.Once the angles changed, get off the brake completely. It does change the angle of the turn. If your bodies on the inside no problem.
Trailing brake has saved my bacon several times
Most of this comes naturally after riding for years, you just feel it after awhile. You can always spot a road racer with a dirt bike background on the track, Rossi is a great example of this. Great video dude!
8:56 notice how the gree spot of the rims gets in sync because of the rear tire going a bit faster for just a second. absolutely satisfying
Dang! Good eye!
If I ever tried any of those MotoGP guys' special techniques.. I'd be dead.
you'dbe dead if you tried to go on a track at a fraction of their speed without doing some of their stuff 😉
@@CarloPiana But I DO go around a track at a fraction of their speed. A small fraction but anyway :)
The other special technique they use that I'm unwilling to adopt is a willingness to take occasional, wicked falls. No pain, no gain is very literal at times.
@@kengoodrich9027 That is very true, and essential to their riding.
I'm old (57) but want to get into it. I ride street a lot with some enduro but this stuff scares the hell out of me. I want to do it because I ain't getting younger, but wonder if I am an old fool.
Mike, IMHO, your vids are some of the best out there! Great graphic and video examples of what your explaining. This only helps me ride my K5 GSX-R1000!
Your comments are really cool. I've been riding hard for over 45 years with both motorcross and street bike experience. the main thing I liked was you explaining how using the real brake going into a corner extends the wheelbase and makes the bike more tracable through the corner. I've never really understood it until now but always knew I needed a good rear brake. My SV650s lost rear brake for a few months- before I was able to fix it- and I couldn't get into a corner worth a shit. Now I understand why. thanks a bunch my friend!
Thank you for breaking it down like that. I know it takes tremendous amounts of skill to ride a race bike. I have even more res for these incredible athletes now. Excellent video!
@Mike on Bikes, I usually watch videos like this and cringe at the inaccuracies, perpetuated myths, and outright falsehoods. This was really well done.
I work in MotoGP and Superbikes. This is excellent work, Mike! Keep it up!
A lot of these things are what you do naturally, when you've been riding a few years and feel comfortable on your bike.
But it's a visually nice video to watch and interesting to have it verbally broken down and explained.
This is one of the most underrated channels ever! Great content. Great audio. And Great editing!
This is a video I've been searching for a while. Just got into MotoGP this year and could never really find the next level deeper stuff to learn
Awesome!
You got into motogp this year? Woaah... Are you quatararo?
Isle of man tt nuff said
Brilliant video. Actually seeing how the bike flexes under different inputs is super helpful. I'd love to see the same video but from the perspective of street riding - i.e. where sliding the rear wheel isn't part of the process (one assumes!). Thanks again! I'll be studying this one a number of times.
Long time DRZ400SM owner, I've had many bikes before the SM and i'll NEVER go back!
It didn't take me long to get the hang of the riding with that dirt/sport mixed style from just riding on the roads. It truely is amazing fun & you explained it in such great detail.
Seriously enjoyed this video!
This is genuinely the best explanations I´ve found in CZcams, even after years watching videos on the matter.
I’m learning to ride track and increasing my speed on a CBR1000. Constantly you hear things that make you want to change things but what’s really cool is you explained something I do that I didn’t understand. I couldn’t explain to my dad or any of my friends why no matter what amount of engine braking the big bike gives me I need to drag my rear brake to feel safe entering the corner. I understood that under acceleration the rear shock extends, and Id love to add that on a bike like mine with a very poor turning radius the actual decrease in wheelbase actually becomes a huge factor in even making certain low speed turns without dropping the bike or pushing wide. But I never thought about the effect of braking on the suspension when entering. In no way do I pretend to be as good as those guys but thanks for telling me it’s not something to let go of. 👍
Great video. Love your incorporation of both supermoto and superbike riding styles. Keep these coming for sure
Thanks!
I agree
I’m 49 and I’ve been riding most of my life and I actually learned some new stuff here! Great video. Thanks.
(Suz DR-Z 400 E, Suz GSX-R 1000, Aprilia RSV 1000-R)
Wow, I love how detailed is your analysis. Quality content even for non-bikers as I.
Keep the videos coming. Even though I have to keep rewatching them I’m learning a lot
Salesmen don’t teach you anything and neither do bike racers and tv race commenters. Buyers educate themselves.
You have to experience it yourself to better understand it but this video explains a lot
In conclusion, I have no idea what I’m doing
Du har bäst förklaringar Mike! Det är ett nöje att kolla dina videos. Tack och God Jul!
Great video! As a new rider, I want to learn as much as possible about the physics behind going fast on a track, because that makes a better rider overall and I love speed with control.
Good stuff - looking forward to seeing more!
Thanks!
Great improvement of the scandinavian accent, compared to first uploads :D Great videos, specially for video editing. Keep it up man
Watching the rear tire float in the entry of the turn, and the front wheel floating off the ground at the exit of the turn in slow motion is surreal. I didn't even know that happened when watching racing at normal speed playback. Great footage and educational content👏👏👏👍
This guy talked about cornering for 14 minutes and know how to make it interesting! Bravo!
I think everyone subconsciously do their own version of weird techniques consciously or subconsciously. It all comes down to gut feeling, how you should position and move every muscle to get yourself comfortable on the bike
One of the best vids I saw in last couple of years. Great stuff. Thanks.
I started racing motocross in 1972 ... which was really a blessing, because the tracks were just mountainsides, and there was a real sense of community in the race world. I stopped racing, and moved to a hardtail 1957 HD Sportster with four over forks (Motor number 1677 ... that's right ... one of the first 2,000 built). Then I ended with a two Yamaha V Star Classic 1100 CC. Go to Boulder Colorado, and ask a few riders how fast I could get that cruiser through the mountains (Hint: Passed a few Ducati Monsters that were 'all in') I became a huge Rossi fan, and was amazed at his millisecond to millisecond control and next level expertise.
Point of story: This video answered SO MANY questions I have had for decades! THANK YOU!!!!!!!
Excellent descriptions and examples. I didn't race but rode bikes for decades. This vid has clarified a couple of things about weight transfer and clutch-use during braking and turning. Thank you. Peace.
This is absolutely brilliant, thank you! These pro riders do most of this stuff intuitively, the rest of us have to learn it.
exactly. also they drive thesame corners all day every day with perfect conditions, its impossible for a regular rider to try to learn any of these pro (not high skilled: PRO) skills without first having like, 100 hours of track time? great video none the less, but these guys sit on their bike for a living and drive instinctively for sure
They’ll sell you stuff you can’t use, from shops. Buyer beware! Buyers job is to get educated before you go shopping. You might find you don’t like these new era bikes.
Most of these guys train hard and were probably coached from a young age. No one instinctively knows how to ride a motorcycle on a track. They learn by being taught or by crashing a lot.
@@Dave-sw2dm Sure, but these guys at the very top are developing their own styles and techniques and some of them have otherworldly abilities that no amount of training will get most of us to. They would have learned and practiced many of the basics for years but at some point they are intuitively better than others. Just how it is.
@@Dave-sw2dm Correct. We're all beginners at first, even the pros. When I was 15 I took my bike down to the beach sands and learned how to fall off. That is practicing how NOT to ride a motorcycle. Falling off is the best teacher, but not recommended on hard roads.
I've been riding for 59 years now, and very seldom fall off these days, despite riding like a hooligan at crazy speeds. Most people I know will only ride pillion with me once. LOL.
This is a great video and so helpful. There’s not enough of this sort made. Thanks :)
Thanks!
I totally agree
This is some next level...stuff. Had my low-side 10/7 - this video would have prevented it. The motor-cross 'drifters' on the track was incredible. Thank you for providing information w/ clarity.
Great video! I always drag the rear when cornering. I didn't know why. Now I do! In fact, I'm going to come back to this video a few times as I'm seeing more and more of why I do what I do. For me, it has been instinctive based on thousands of hours of nailing corners as fast as I can. I just kept adjusting things each time until I got it right. I can feel when I nail a corner as I come out of it. You can feel it 100% and you know you haven't left anything on the table. Anyway, great vid and thanks for making it!
Excellent video! I'm gonna have to watch it several times, though.
As I understand it, dragging the rear brake also keeps some load on the front when you come off the front brakes, this still keeps some extra traction on the front tyre but also slows down the front suspension when it tries to extend, making the bike more stable and settled.
Yeah, making the back end squat a little will keep the load transfer smooth, so the front doesn't get lifted as much. It's like two sides of the same coin.
It's also easier i think to keep the rear brake at a set level, and then modulate power to the rear wheel with the throttle. Especially if you're riding a super torquey bike like the Ducati Miller is on. Similar to keeping the rear brake on a little to prevent the wheel breaking out when going slow in mud.
It also provides some drag on the rear and helps the front rotate quicker
Dragging the rear brake while staying on the throttle helps to keep the top of the chain tight too. And that keeps everything smoother all the way through the turn.
If you only use engine braking and front brakes, that tightens up the bottom of the chain...
@@Jim1457a Fascinating, never thought about it that way. Always used engine braking, smootch clutch loosening to keep my bike steady whilst entering the corner.
Thank you for putting this content out there. It really helps when dissecting Motorcycle Dynamics!
dude this channel is awesome. educational but entertaining and even someone like me with zero motorbike experience understands what he says in this video and i love it. Keep it up dude!
Thunderhill is a good track. The long straight into turn 1 is my favorite. Then 11 and 12 into the back straight is fun.
I love how I know you’re Swedish because of the way you say „technique“
Thank you for this video! You have gone over some very critical corning techniques and explain the physics behind what is going on. Very cool!
Man! That intro! Got Goosebumps😍
The explanation was really deep... Thank you Mike👍
I learned more here than in school.
If you ever do ANYTHING with your life at all, you'll probably quickly realize what a waste of time school was...
All this talk of angles is useless without a basic grasp of trigonometry.
Same
@@interestedparty497 which is what you learn in elementary.
So of 10 years or more of school 6 are wasted time
Gosh these vids are amazing!!!
Thx!
@@MikeonBikes Hey do you ever ride Skyline or Hwy 9? I'm pretty sure I remember you saying you live in the SF Bay area in one of your vids
On very rare occasions, when I’m not on the track I do ride HWY 9 . 😁
@@MikeonBikes lol what track? I've never been on a track and have been itching to try it out.
@@brendanfitzgerald7860 Thunderhill, Sonoma, Buttonwillow, Stockton little 99, Hollister hills OHV, Metcalf OHV, Foresthill OHV...
Watching bikes corner in slow motion was the best visual explanation I got learning how to countersteer.
Many examples of tight turns where you can blatantly see the wheel turned opposite the direction of travel in a corner. It made it all make sense.
Ridden and raced for 40 years, and I learnt from this video, Well done.
Gracias por poner subtítulos en español, así me ayudas a sacarle jugo a mi SUZUKI GSXR600 K9. Me suscribo. Saludos desde Guanajuato México 🇲🇽🏍️
Lot of good information in this video. Along with that good music in the beginning. If anyone wondering where to get that music.
Artist name: Adrian Berenguer
Track: Continent
Lots of other tracks including violin are amazing. You can find him on Spotify.
Been driving motorcycles for 37 years now. Watching this video and others, just makes me admire and appreciate pro riders all the more.
I visited my folks this weekend. A nice drive home through the Adirondack mountains. I mentioned to my Dad that I’ve been really into watching F1 lately. He said the same but Super-bikes. I ended up here. Just baffles me this cornering and how they don’t go over but so far loving it!
Awesome, detailed explanation very helpful, many thanks!
Thanks!
Me watching video: ok now i know what to do in corners
Me in the corner: ahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
( Brain 🧠 stops working )
Jot Sodha for me it’s the other way around
😆 same
Hahaha gago
This vid didn’t teach you anything. Ever heard of drag bikes? They don’t go around corners.
hahahahhahaahha tang inang yan 🤣😂🤣😂
everything in this video is so impressing/beautiful/passionate that makes me (as a bikes and physics lover) soooooooooooooo amazed that i could watch it in repeat for hours.
I watched this video when I didn't have a sports bike 2 years ago.
Got recommended this again when I have one! Thanks for such an amazing vid, friend!
Márquez doesn't feather the clutch because MotGP don't use clutch to downshift. The first and only time they use it is at start. Seamless shift works this way. Engine break is controlled by the electronics and slip clutch. The rest is entirely accurate in my own book.
Thanks! I should have mentioned seamless shift.
Once I broke my clutch so it was constantly engaged. I managed to get home and clutchless upshifting was easy. My downshifting on the other hand was anything but seamless lmao
@@jameschartrand7962 actually, if you know how to do, also downshifing can be done relatively easily, you need to remove all possible torque, but without blipper il really not easy. 1st-2nd almost impossible even upshif and with fast-shifter (I've one on my track bike, then again)
I'm surprised that that Jack Miller doesn't have a thumb-brake so he can move freely while using his rear brake I thought all the MotoGP riders had them.
@@rivrevvmedia he's Australian. Enough said.😃
Thank you. Very informative, thoughtful a clear
Thanks!
Wow, the motorcycle dynamics is so very complicated and i love it!
amazing video with accurate explanations of the motorcycle dynamics. Not so many with this quality around. WELL DONE! thanks!
I really can’t understand this video, but you explained me a lot.
You explained me a lot, but I still don't understand shit. Thank you.
Salesmen have been ripping off customers for decades. So this vid tries to stop people getting robbed. The problem is, these bikes aren’t for sale.
I thought I knew quite a lot but learned some interesting things here.
You’ll learn 1000 times more from gaming. The establishment puts a price on stuff which prevents you from learning. Gaming has opened up the new world full of learning for you. You can learn more than Rossi knows, in 2 years, from gaming. Gaming is the future, not real life. You can race every second of every day in gaming. There’s no 2 week wait, thing.
Haven’t even bought a bike yet but this is super informative. Not just for track purposes but provides a lot of detail to what you could apply to maybe even normal driving.
Mike, your videos are amazing. Thanks and good luck on the -road-track!
This could legit be a documentary with your voice
We can clearly see the countersteering
I just did california superbike school the other day. I'm 52 and racing supersport. I'm not very good at it but I'm trying to improve. This video is great. You actually taught me something.
3 mins in and this is already the best video I've seen on the subject.
The kid in the Kuja leathers is Max Toth. One Insanely fast 14 yr old. Going into Red Bull Rookies next year!
On the topic of shifting weight forward to increase the traction of the front tire (e.g. 5 minute mark), what I never hear discussed is the trade between increasing traction from the weight shift (yes, this surely happens) and *needing* more traction because the tire is more heavily loaded. In general (i.e. avoiding considerations of extreme unloading), for a given turn radius, isn't a more heavily loaded tire going to slide-out first to a more lightly loaded tire as speed increases? Yes, it generates more traction, but also needs more traction to make the turn because more lateral force is needed to follow the arc.
Great observation! Lets consider the following things:
1.
Rubber generates friction in three major ways: a) Adhesion, b) Deformation, and c) Wear.
(This entire section is an excerpt from "The Racing & High-Performance Tire, Paul Haney, 2004")
a) Adhesion
Adhesion is a property of rubber that causes it to stick to other materials, like tape. If the two surfaces were perfectly smooth the true area of contact would be the same as the observed area of contact, but this is not the case. Real surfaces are actually very rough, so contact is limited to the highest protuberances on each of the two surfaces.
insideracingtechnology.com/Resources/vertload.gif
As you can see in Fig. 3.3, larger loads on the rubber presses the road irregularities into the rubber, increasing the contact area. More area in contact means more adhesion between the surfaces and higher friction forces. This situation satisfies the general requirements of the friction equation, Ff = Cf x Fv.
b) Deformation: Mechanical Keying
Rubber in contact with a smooth surface generates friction forces mainly by adhesion. When rubber is in contact with a rough surface deformation comes into play. Movement of a rubber slider on a rough surface results in the deformation of the rubber by high points on the surface called irregularities or asperities. A load on the rubber slider causes the asperities to penetrate the rubber and the rubber drapes over the asperities. The energy needed to move the asperities in the rubber comes from the differential pressure across the asperities as shown in Fig. 3.4, where a rubber slider moves on an irregular surface at speed V.
insideracingtechnology.com/Resources/mechkey.gif
c) Wear
In addition to adhesive friction and deformation friction, rubber produces traction forces by means of tearing and wear. As deformation forces and sliding speeds go up, local stress can exceed the tensile strength of the rubber, especially at an increase in local stress near the point of a sharp irregularity. High local stress can deform the internal structure of the rubber past the point of elastic recovery. When polymer bonds and crosslinks are stressed to failure the material can't recover completely, and this can cause tearing. Tearing absorbs energy, resulting in additional friction forces in the contact surface.
Wear is the ultimate result of tearing. When local stresses increase in strength past initial tearing or remain at high strength for a period of time, that tearing can result in separation of material.
Total Friction
Now we can write a more general equation for rubber friction:
Ftotal = Fad(hesive) + Fdef(formation) + Fwear
2. The maximum lateral force that can be developed increases as the vertical load increases, as shown in segment 1. BUT because of tire load sensitivity en.wikipedia.org/wiki/Tire_load_sensitivity, it is at a diminishing rate. So for a pneumatic tire the coefficient of friction decreases as the vertical load increases.
What all of this means: A rider must find a balance between loading up the tire enough vertically, to achieve maximum lateral force, without overloading it vertically, which will cause the coefficient of friction between the tire and the asphalt to decrease to the extent that less lateral force can be achieved.
Make sense?
@@MikeonBikes Thanks Mike. I can see the pieces in play, but the overall situation is to complicated to resolve with basic principles and intuition. In addition to the loading of the front tire, there's also the rear tire and ultimately, the goal is to maximize performance of the two-tire system. At my level of riding it hardly matters, but its fun to think about.
@@kengoodrich9027 It sure is fun to think about.
Supermoto riders use a "U-to a -V" line through tight corners, because it generates faster lap times. They slide the rear to achieve this.
You certainly want to "maximize the performance of the two-tire system", sometimes this means sliding the rear into corners.
As I heard at the braking point, you move your bodyweight forward. Then into a corner(right before steering) you should move your weight backward not to lose traction.
@Johnny Steffy Do not "lock your arms." When the front slides it will turn. If your arms are locked, your whole upper body will shift, amplifying the turn and greatly increase the likely hood of crashing. Even in panic braking, your arms have to be as loose as possible on the bars to allow the bars to turn without upsetting the bike more.
as a rider, watching this video is a well spent 14 minutes and 48 seconds of my life.
HEY KOOL EXPLANATION!!!!! Next time someone tells me I don’t need rear brakes , I’ll point them your way!!’ I’ve been trail braking for 49 years in all styles. Balances me and the bike out, This is an excellent video!!!!!Cheers
So cool! I’m gonna pack my suit and go now.
Do it!
-Im 15
-I don't ride motorcycles
-this was in my recommended
-so I went with it
This video is amazing. It is the first one I see on this channel and I immidiatly subsribed, it's something i don't usually do.
I love the details you give and the accuracy of the informations. I learned so much in this few minutes. Please keep go like this bro!💪💪💪
I am so glad I subscribed to your channel so long ago. There is just always something very interesting to watch!!
I played this video near my 80cc moped. Now it's 1000cc Super Bike.
XD
What resources do you use? I would really love to dig more into this myself . Great video!!
Check out:
How and Why Motorcycle Design and Technology, Cocco, Gaetano.
Race Tech's Motorcycle Suspension Bible (Motorbooks Workshop), Paul Thede.
Motorcycle Dynamics (Second Edition), Vittore Cossalter
Mike on Bikes wow awesome. Thanks a lot mike
Keith Code : A twist of the wrist 2 and 'The soft science of road racing motorcycles'
@@MikeonBikes
Great video and thanks for the links.
Some books may be challenging but I find when my brain has some understanding of a concept that in practice (without the explanation) seems alien and just plain wrong, it's a lot easier to try something new. Loved the explanation of using the rear brakes to affect the rear geometry too.
At the end of the day it's all about doing 'your homework', whether it's reading the books and getting conceptual knowledge or going out on track and riding and seeing what the fastest riders are doing and learning from them and also seeking coaching advice.
I've never really thought about SuperMoto before but it looks so much fun. Not sure I'd want to toss my S1000RR around like that, nor would I ever do that on the street but maybe instead of replacing it in a year or two with another S1000RR I'd just keep it and get a SuperMoto bike for 'off road use only.' I've seen countless videos of Rossi riding his dirtbike around "The Ranch" that he has back home but never really thought about something like this for your everyday guy. For me, even when just riding on the road, learning skills like these is all just an extra 'get out of jail card' to deal with situations that may randomly present themselves that would otherwise lead to a less than happy ending. In a similar way, when I raced bicycles on the road, there were some times in early season races where I'd use techniques learned on mountain bikes to keep my ass off the asphalt.
Just Subscribed to your channel and I'm off to see if there's a "SuperMoto for the technically challenged" video.
Keep up the good work.
I just have immense respect for Isle of Man Racers! That's just insane. Just watching the videos makes your heart rate skyrocket and breath change to gasps! It really humbles those who think they're great on bikes!
I miss my motorcycle stolen by cops after their murder attempt accident on me Dec 2018! Love your videos Mike! Just goes to show how much we don't pay attention to.
Thank you for this explanation and comparison of rider activities in a race environment.
I am not a motorcycle rider and had no idea of the complexity and variety of methods used to corner. Very interesting!