[python] Re: Stability Theory

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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