Maximum lean angle?

[caspernz]

90 degrees from the vertical.

Depends on the angle of the water table in the immediate vicinity of the cold tyre heroics doesn't it??

[ukusa]

On a low bike like a Harley it would be a lot less than taller bikes.

Like maybe a Penny Farthing?

[sinfull]

On a low bike like a Harley it would be a lot less than taller bikes.

This place gets more retarded every day.

.............................

[Spazman727]

I think 100% is about maximum. I don't know how to go past 100% anything.

[wingnutt]

well generally, if you try to find grip using the chicken strip, you are already screwed, at maximum lean, a motorcycle pulls
1 G at 1.1 G you are gone, only a racing tire will allow more than 1.1G

if your instinct is telling you you are at about maximum, then you probably are very close.

[Hitcher]

What would be the maximum lean angle you could get on a cold tyre?

A contender for Most Ludicrously Facile Question of the Year.

[Hitcher]

at maximum lean, a motorcycle pulls 1 G at 1.1 G you are gone, only a racing tire will allow more than 1.1G

Compelling proof that 73.21% of online statistics are made up.

[ducatilover]

well generally, if you try to find grip using the chicken strip, you are already screwed, at maximum lean, a motorcycle pulls
1 G at 1.1 G you are gone, only a racing tire will allow more than 1.1G

if your instinct is telling you you are at about maximum, then you probably are very close.

What are you smoking? I'll avoid it like herpes on toast.

Send from my tower in Mordor using a pygmy hobbit dick on a pestle and mortar.

[imdying]

I wonder if an electronic warning device could be developed that gives an indication of when approaching a dangerous lean angle. Something like an electronic spirit level that was audible.

Already has, it's called traction control.

[bogan]

I wonder if an electronic warning device could be developed that gives an indication of when approaching a dangerous lean angle. Something like an electronic spirit level that was audible.

I made one of those a few years ago (its a bit more complicated than a spirit level btw), an LED bar graph was used instead of audio, as there isn't much you can do if you're about to fall off, and something beeps to tell you that... better to learn you got to 70% on that last corner, and don't bother pushing it any further. Worked ok, but needed a better accelerometer and testing data; well, that, and nobody wanted one either

[p.dath]

What would be the maximum lean angle you could get on a cold tyre? (or "tyres" plural considering most bikes have two)

There is a really famous guy called Hans B Pacejka. In my opinion, one of the world's experts in tyre dynamics. If you Google "Magic Tire Formula" you might learn that he is pretty clued up, and many major tyre manufacturers use his formulas and work when designing their tyres.

Now try and get one of his books, such as "Tire and Vehicle Dynamics", and he works through the maths involved. I'll warn you, it helps if you have a Ph.D in physics or applied mechanics, as it is complicated. I would be happy if I could just read it.

Now skip to the magic tire formula to do with grip, and you'll see it has around 20 input parameters. And from this you can expect a close approximation to the lean angle for the case your looking at.


But if you want a short answer, while the 20 or so input parameters are changing, which they will constantly be in this case, there is no one single answer for the question you asked. And even if you worked out the answer one day through experiments, you can bet the answer will be different the next day.


So the moral of the story is, treat the whole rider machine system with respect until it is warm. Actually, just treat it with respect, full stop.

[p.dath]

I wonder if an electronic warning device could be developed that gives an indication of when approaching a dangerous lean angle. Something like an electronic spirit level that was audible.

By dangerous I'm going to assume you mean unrecoverable. And if it has reached that point forget about the indication, you might as well get it to dial 111 instead with your location.

It's like have a "plane stalled" warning in a plane go off as it plummets out of the sky.

[p.dath]

well generally, if you try to find grip using the chicken strip, you are already screwed, at maximum lean, a motorcycle pulls
1 G at 1.1 G you are gone, only a racing tire will allow more than 1.1G

if your instinct is telling you you are at about maximum, then you probably are very close.

I would have thought the motorcycle would reach maximum lean angle after it had crashed and had come to a complete stop lying on its side, and would be "pulling" zero g's ? I'm teasing you. What I'm trying to say is while you are not likely to pull 1G on a motorcycle on the road, I'm not aware of any rule that means it will suddenly fail at 1.1G. If you can get enough weight onto the tyre, and the tyre carcass is strong enough, it may well continue to grip before it explodes from force - and because I haven't seen many motorcycle tyres explode from the force applied to them (apart from defective tyres) it seems unlikely that they would suddenly fail at 1.1G.

The chicken strip is not a defective strip of rubber. It grips like the rest of the tyre although it will change the shape of the tyre's profile. Lets take an extreme case of a sports motorcycle with a performance tyre leaning at around 50.1 degrees - do you think it'll be using the chicken strip near the middle or the extreme outer edge of the tyre completely away from the chicken strip?

[awa355]

I wonder if an electronic warning device could be developed that gives an indication of when approaching a dangerous lean angle. Something like an electronic spirit level that was audible.

Untill the fun police make this sort of rubbish mandatory, hopefully, long after I've given up riding, we will just have to learn to ride using our own skills.

Anyway, being cranked right over in a corner and having a 'beep' go off in your ear, wont change where you are and what your options are.

[Dave-]

I made one of those a few years ago (its a bit more complicated than a spirit level btw), an LED bar graph was used instead of audio, as there isn't much you can do if you're about to fall off, and something beeps to tell you that... better to learn you got to 70% on that last corner, and don't bother pushing it any further. Worked ok, but needed a better accelerometer and testing data; well, that, and nobody wanted one either

Have you re-evaluated gyro's recently bogan?

I've thought about hacking something similar together but maybe mounting the LED's in the helmet on the bottom of the visor area.