[python] Re: gyro forces

  • From: "daryl bender" <darylbender@xxxxxxxxxxx>
  • To: python@xxxxxxxxxxxxx
  • Date: Wed, 19 Oct 2005 08:40:13 -0400

Hi

Ya I rode them too and used to race motocross before that. "Nuts" is a term that tends to get applied to anybody who rides a big bore bike well. Ask you friend. The thing is its really the benchmark that's changed. You will do things that average joe couldn't even fathom but you do because you know they are simply withing the performance parameters of yourself and the bike. That gets you 98% of the way to competitive. Once you go there that last 2% re-introduces the risk. ;-) anyway....

Without braking I think you'll find that the gyro effect is always there and increases with speed (it gets more "sluggish" to make a turn at high speed). When you refer to "turning the opposite corner" I think you mean "countersteering". In fact you do this all the time but at high speed it becomes a deliberate undertaking (a hard push). It sort of (repeat *sort of*) has the feel of what you need to do to turn the spinning bicycle wheel in your hands. Sloppy analogy (it is different) but you *can* feel the gyro induced forces through the bars.

Braking from speed is another layer on top of this if you will. It does try to stand the bike up (still not sure mathmatically *why*) and if your trying to instigate a time limited turn normally you're going to be in trouble. Countersteering does work but it takes SERIOUS, concious, deliberate effort sort of like a rancher grabbing a bull by the horns and twisting him to the ground.

Cheers
Daryl - I don't think you'll ever see a greater symbiosis of man and machine than a great road racer. I don't think you'll ever see a greater symbioisis of man and dirt than a bad one (DB - still here after all these years) ;-D


From: "Paul Bell" <paulb@xxxxxxx>
Reply-To: python@xxxxxxxxxxxxx
To: python@xxxxxxxxxxxxx
Subject: [python] Re: gyro forces
Date: Mon, 17 Oct 2005 09:32:47 -0400 (EDT)

> It´s good that Dirk brought back the gyro effect into discussion.
>
> Jürgen.
>

I was just talking to a motorcycle buddy about gyro effects. He is a very good
rider and rides the worlds fastest production superbikes.(he's nuts!)

At any rate what he said was, at higher speeds when you are in a corner and
hit the brakes the gyro effect kicks in and tries to stand the bike straight
up. He says as you get accustomed to it you can counter this effect by turning
opposite from the corner. He says this drops the bike back into the turn.
Weird but interesting. He also said without brakes there isn't any real gyro
effect.

Not sure if this helps but interesting take on gyro effects on two wheeled
vehicles.

Cheers,

Paul Bell

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