Could a "heavy" racer win?

[SWERVE]

We all know that the only education you really learn at Uni are
Which pubs sell the cheapest beer
Which dealer sells the best drugs
And which girls (or boys !!!) sleep around.
All the basics to then go on and run the country............................

[crazy man]

We all know that the only education you really learn at Uni are
Which pubs sell the cheapest beer
Which dealer sells the best drugs
And which girls (or boys !!!) sleep around.
All the basics to then go on and run the country............................

lmao your right there

[Dave-]

Quick everybody run and hide the University educated have arrived to baffle us with bullshit no one in the real world cares about

ah yes, the real world devoid of physics.

[Kickaha]

ah yes, the real world devoid of physics.

Your education can't have been very good if you think there's a world devoid of physics

I'd ask for my money back if I was you

[Dave-]

Your education can't have been very good if you think there's a world devoid of physics

I'd ask for my money back if I was you

I've got better things to do with my time than waste it here.

see ya!

[Shaun]

I've got better things to do with my time than waste it here.

see ya!

me to but IM drunk again and cannot drive

[schrodingers cat]

This page needs a sarcasm smiley
seriously

[schrodingers cat]

So I've skim read over this thread, I'm pretty sure I get what everyone is saying (or trying to say)

here's how I see it.

the taller, lighter rider has the cornering advantage, by modeling a motorcyclist as a mass rotating around a parallel axis (using parallel axis theorm) the rider who's mass is closest to the axis with the lowest weight will have the lower tangential force which means the corner can be completed at a greater angular velocity.

in a straight line here's how I see it.

we know there is a static force of friction, that is the absolute force that the tyre will not slip at, any more and it begins slipping and becomes the kinetic force of friction, the equation is F.s = u * N (where I'm missing a load of sub script and a greek letter).

we also know the tyre excerts a torque and a tangential force is found as T = I * w (where I'm missing another 2 greek letters) and the tangential force will be divided by the radius.

so we can find the force at which a tyre will slip given the radius and mass and angular acceleration of the tyre and the weight of bike (assuming it has no front wheel, divide by the mass distribution) and coefficient of friction of a given tyre by saying:

(I * w)/r = u * N and solve for whatever dependant variable you wish, input the rest.

and because a wheel is an odd shape you'll have to do some pretty strange maths to work out the moment of intertia (yay torsional oscilations!) but that's beside the point.

what you really need to do next is solve the equation for angular acceleration and find the limit as mass tends to infinity.

I'm pretty sure I'm right, I'll ask my lab tutor in about a weeks time.

Sounds pretty right - for a single instant and as you admit yourself, assuming a single wheel of a regular shape.

You've just opened the whole can of worms - two wheels, transiant states, changing track surface (friction potential)

You can see why peole say 'Just get on the thing and wring its neck'

Good post tho

[RobGassit]

He could win if he could find his bike. Somebody with a degree calculate these odds.

[SWERVE]

He could win if he could find his bike. Somebody with degree calculate these odds.

I would say the odds of finding anything in there are.......... slim(unlike her haha)
Imagine what went through his head before tackling that............... must have felt like Sir Ed when he first stood at the base of Everest and looked up.

Just a pic you happened to have on file Mr Gassit......

[Kickaha]

Just a pic you happened to have on file Mr Gassit......

From his family album

[RobGassit]

Is it wrong to like them big?

[RobGassit]

Actually I googled "Buell on top" and this was the first hit!

[Dave-]

So I've skim read over this thread, I'm pretty sure I get what everyone is saying (or trying to say)

here's how I see it.

the taller, lighter rider has the cornering advantage, by modeling a motorcyclist as a mass rotating around a parallel axis (using parallel axis theorm) the rider who's mass is closest to the axis with the lowest weight will have the lower tangential force which means the corner can be completed at a greater angular velocity.

in a straight line here's how I see it.

we know there is a static force of friction, that is the absolute force that the tyre will not slip at, any more and it begins slipping and becomes the kinetic force of friction, the equation is F.s = u * N (where I'm missing a load of sub script and a greek letter).

we also know the tyre excerts a torque and a tangential force is found as T = I * w (where I'm missing another 2 greek letters) and the tangential force will be divided by the radius.

so we can find the force at which a tyre will slip given the radius and mass and angular acceleration of the tyre and the weight of bike (assuming it has no front wheel, divide by the mass distribution) and coefficient of friction of a given tyre by saying:

(I * w)/r = u * N and solve for whatever dependant variable you wish, input the rest.

and because a wheel is an odd shape you'll have to do some pretty strange maths to work out the moment of intertia (yay torsional oscilations!) but that's beside the point.

what you really need to do next is solve the equation for angular acceleration and find the limit as mass tends to infinity.

I'm pretty sure I'm right, I'll ask my lab tutor in about a weeks time.

Sorry to Necro, but turns out I'm right.

The mass holding the bike down does provide an increase in grip allowing the bike to accelerate at a rate given the mass, however the acceleration of the bike is impeded by the same mass, therefore the weight of a rider has no effect on the bikes performance....but we all know this isn't entirely true and the explanation lies in the slipping of the tyre, which we assumed the wheel did not do.

I think most of the difference lies in tyre slippage, but also rubber compounds, aerodynamics, engine design (gear ratios, fuel rates, rpm) will be reasonable contributions also.

For now, my advice is experimental or "just ride the fuckin' thing"