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Posted (edited)

Okay... humble pie time for me. Scuppered by my own experiment.

 

Turning the bars away from the direction of your turn, mid corner, DOES shorten your wheelbase. What it doesn't do is aid counter steering as the wheels orientation resists the turn and you will fall your gat off.

 

So. Fabian46, you were right, mostly, and I was mostly wrong.

 

 

So how far out of line was the rear wheel to shorten the wheelbase....?

 

and what was the lean angle

 

and how did you measure the "effective head angle"

Edited by GoLefty!!
Posted

 

 

So how far out of line was the rear wheel to shorten the wheelbase....?

Not a lot at all. basically, bike on its side (45 deg) and you "counter steer" (pull left handlebar towards you if turning right and vice versa) and the more you turn the bars, the further back (towards the rear of the bike) the contact patch moves, reducing the effective wheelbase.

 

won't work when you're upright for the reason you said before - rotating around the head tube. But as soon as the wheel is tilted, it's a different story. At the same time, your head tube to contact patch measurement reduces as well.

Posted (edited)

its a test that also does not work while you're actually riding the bike...

 

 

 

I see what you did there and its just wrong because at those extreme lean angle the bike is no longer riding. I have actually ridden a bike and tried that at slow speed. That Danny McAskill level of skill.

 

take the bike and at reasoable lean angle, say 15 to 20 degree, hold the front wheel rigidly and swing the rear o the gravel. Then go measure the distance of any point on the arc to the the point where the front wheel was anchored. You may want to try this with a can of referee's cream...

Edited by GoLefty!!
Posted
its a test that also does not work while you're actually riding the bike...

 

 

 

I see what you did there and its just wrong because at those extreme lean angle the bike is no longer riding. I have actually ridden a bike and tried that at slow speed. That Danny McAskill level of skill.

 

take the bike and at reasoable lean angle, say 15 to 20 degree, hold the front wheel rigidly and swing the rear o the gravel. Then go measure the distance of any point on the arc to the the point where the front wheel was anchored. You may want to try this with a can of referee's cream...

Yeah, I know. which is why I said I was scuppered by my own experiment.

 

In the experiment it DOES shorten the wheelbase, but it won't go through to real world unless you lean like Marques.

Posted (edited)

Yeah, I know. which is why I said I was scuppered by my own experiment.

 

In the experiment it DOES shorten the wheelbase, but it won't go through to real world unless you lean like Marques.

 

Ok but even if your experiment shows that within a certain condition it does shorten the wheelbase at an extreme lean angle you basically arguing semantics because the purpose of the experiment was too determine whether there is a benefit to countersteer. The angle of lean in your experiment require to satisfy your hypothesis is impractical meaning that the experiment is flawed and the hypothesis does not hold true.

 

Laying the bike flat on it side and turning the bars is not really of any use to anyone other than someone trying to the fit the bike into the load bed of a bakkie... :ph34r:

 

You're also no longer exploiting the contact patch of the tyre but rather the side walls....hmmmmm :nuke:

Edited by GoLefty!!
Posted

 

Ok but even if your experiment shows that within a certain condition it does shorten the wheelbase at an extreme lean angle you basically arguing semantics because the purpose of the experiment was too determine whether there is a benefit to countersteer. The angle of lean in your experiment require to satisfy your hypothesis is impractical meaning that the experiment is flawed and the hypothesis does not hold true.

 

Laying the bike flat on it side and turning the bars is not really of any use to anyone other than someone trying to the fit the bike into the load bed of a bakkie... :ph34r:

 

You're also no longer exploiting the contact patch of the tyre but rather the side walls....hmmmmm :nuke:

Exactly. Also part of why I said I was scuppered by my own experiment

 

Lol. What a dumbass

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