Leaning

[pyrocam]

Hmm. I thought I could figure this out myself but instead of making up my mind I thought I might just ask.

My theory is, it pretty much doesnt matter how low the bike gets as long as the center of gravity is close to the middle of the bike
like (YAY MSPAINT)


but. im sure ive seen bikers who just stay on the same position and go around using the centrifugal force to hold them on.


Im talking about comuting corners by the way, not 180k SH22 corners. I want to practice them at 50k and whatnot.

Ive played around with putting my butt on the opposite side of the bike that im turning but it feels odd. prefer just to lift up on feet and lean that way (IE lean right while going left) to keep the bikes center of gravity pretty much upright.

anyway. how wrong am I ? Cheers

[Two Smoker]

VERY VERY WRONG!!!

Picture 2 is correct... ONLY DO PICTURE 2!!! Or do the opposite and drop your weight to the inside of the corner...

[Waylander]

I always thought that no matter what speed you lean with the bike at anything faster than walking speed and the rest of the time you turn the bars.


By walking speed I mean the point at wich you have to have your feet on the ground or you fall over.

[sAsLEX]

pretty much wrong

you want to get the centre of gravit low for sure, but also want it to be on the inside of the curve so its "centrifugal"force is applied to push the tires into the ground rather than pull them away will post pic later

ok pic, left is leaning with the bike slash into the corner, Centre of Gravity is red dot
right is leaning away from corner, CoG is red dot

Blue lines represent forces due to gravity and cornering in the vertical and horizontal planes respectivly.
One of the left has the resultant of these pushing the tire and bike into the ground, more grip and stabilty
one on the right is pulling the CoG down and to the rightand not pushing the bike in to the road as much
--both "bikes" heading in to the page and turning left

[Coyote]

Imagine leaning over like that in pic 2 when you are upright and going straight ahead. That's the sort of effect leaning like that would have around a corner

[James Deuce]

There's not such thing as centrifugal force. It is a centripetal force.

[sAsLEX]

There's not such thing as centrifugal force. It is a centripetal force.

yip thats why its qouted! but to the layman there is and most people really struggle to grasp the fact that something isn pushing them to the outside while cornering

Centripetal means centre seeking.

[pyrocam]

hmmm. ok by leaning into the corner. if your going fast enough, and lets say its on a curve like a track. you will be pushing the bike straight 'down' by down I mean in the direction the wheels are aligned to. but if you do pic one. then wouldnt you be putting the directional force 'down' as in towards gravity therefore putting pressure on the part of the tire in contact with the surface of the road instead of trying to push it away from where it is?

does that make sense?

[pyrocam]

yip thats why its qouted! but to the layman there is and most people really struggle to grasp the fact that something isn pushing them to the outside while cornering

Centripetal means centre seeking.

I would have thought it was centrufugal force since your on the 'outside' IE your acting like part of a centrifuge. oh wait.
no.
your right. my bad. centrifuge not a centrufuge my bad

[James Deuce]

I would have thought it was centrufugal force since your on the 'outside' IE your acting like part of a centrifuge. oh wait.
no.
your right. my bad. centrifuge not a centrufuge my bad

There isn't any such force. My 7th form Physics tutor took great pains to enforce that and had successfully challenged exam questions that contained the word centrifugal. Centripetal force describes a force being generated to prevent an object moving in a straight line. The object wants to travel at a tangent to the arc your a setting it on through other forces. A slightly more simple example than a motorcycle is a sling.

[notme]

http://vf750fd.com/blurbs/counter.html

One of the clearer explanations I've seen.....

The broom experiment mentioned is how centripetal forces were explained to me in a class during the collection of one of my "formal" qualifications - quite refreshing to be in a frickin' boring lecture thinking "ah shite, more particle theory - here we go again..." and instead this biker lecturer starts going on about getting your knee down!

[Will]

Pyrocam,

You are going to do the Ride Right Ride safe Course, aren't you. You will learn so much there, like leaning doesn't do anything, it is all in your countersteering. And get to practise it all.

[GNR]

im scared, i understand all the centralpetal forces and the rest :S, it so raa,

[Waylander]

Bah you people bringing physics into this. Just do what you feel comefortable with. 9 out of 10 it's correct.

[FROSTY:Me]

Dude in simple terms--Stick with the bike for now.dont worry about all the knee out hanging off the bike stuff untill you've got a fair few miles under ya belt.