[python] Re: Stability Theory
- From: Ray Schümacher <mtb@xxxxxxx>
- To: python@xxxxxxxxxxxxx
- Date: Wed, 16 Feb 2005 08:12:02 -0800
At 04:47 PM 2/16/2005 +0100, you wrote:
>Hi Jürgen,
>
>May be the stability problems of the P3 at speeds higher then 50km/h, is
>simply because you are lying more flat, and may be it has nothing to do with
>CGs, angles, trails or whatever. The bike could "just" have another oscilation
>frequency, so it begins to shimmer at a lower speed.
Hi Dirk,
I agree. Lowering the rear mass decreases the moment about the rear contact
patch (like a shorted, inverted pendulum) and also shifts mass back, which my
preliminary runs showed to always decrease the stable range. It might be the
main advantage of the Traylors, having mass mostly over the front wheel.
Trail and angle really define the bike, I don't think BB-seat length would be
much influence. It would only slightly decrease the distance from the front
mass to the pivot axis.
Ray
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