land-speed
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Re: Motorcycle streamliners steering

To: "Dave Seely" <dseely@sginet.com>,
Subject: Re: Motorcycle streamliners steering
From: "Glen Barrett" <speedtimer@charter.net>
Date: Mon, 23 Sep 2002 13:25:52 -0700
One must remember that the steering on streamliner type vehicles two or four
wheels has maybe 3 to 4 degrees of steering angle, very limited for not over
steering
during the run. Quick steering or excessive turning angle can result in a
very exciting ride or worse.
Glen
----- Original Message -----
From: "Dave Seely" <dseely@sginet.com>
To: "Waldron, James" <James.Waldron@CWUSA.COM>; <land-speed@autox.team.net>
Sent: Friday, September 20, 2002 5:42 AM
Subject: Re: Motorcycle streamliners steering


> I think I follow what Jim is saying.  When I transitioned from light
weight
> dirt bikes to heavy road bikes I noticed the exaggerated gyroscopic effect
> of the heavier wheels.  What was interesting was that in order to execute
a
> smooth right turn, I needed to apply forward pressure on the right
handlebar
> ('a left turn'), then when the proper lean angle was achieved gently pull
> that right bar back to maintain that desired angle.  This is due to
> gyroscopic precession where a force applied to a gyroscope reacts 90
degrees
> in the direction of rotation.  You can simulate this with a bicycle wheel
> held up by the axles at arms length.  Have someone spin it for you then
push
> the right end of the axle away from you.  So perhaps what our very
> streamlined brothers and sisters are experiencing is simply the increase
in
> gyroscopic effect of the wheels as the speed dramatically increases.  This
> all must be a very odd sensation indeed when you are sitting below the
axle
> height and very near the roll center.
> Dave Seely
> 1141 XF/VOT

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