[python] Re: Python, of course.
- From: Olaf Johansson <noll@xxxxxxxxx>
- To: python@xxxxxxxxxxxxx
- Date: Mon, 12 Sep 2005 11:25:28 +0200
What is acceptable stability anyway? To most people the python or flevo
are far to unstable and hence below their acceptance. They are not
willing to invest the time it takes to learn to ride these bikes.
And above that point? Among us who do ride these contraptions - what do
we consider stable or not? Again, it depends on how deep you are into
the knicklenker-addiction. There are no norms, only individual
preferences. I for one think that anything can be ridden as long as you
find joy in trying.
I am not even sure there are good bikes and bad bikes - it all depends
on how you use them.
tamam,
olaf
On Sep 12, 2005, at 10:46, Dirk Bonne wrote:
On 09/01/2005 07:02 PM, mtb@xxxxxxx wrote:
At 12:35 AM 8/20/2005, you wrote:
The calculations made by Ray and Dirk are a big progress towards the
evaluation of stabilty factors in the python frame geometry. But the
ultimate solution is still not found (and I guess it never will be ;-)
I think that the "solution" would require modeling the reflexive
response and natural damping action of human bodies; the python itself
cannot be made self-stable. However, as everyone here seems to agree,
it can be made easier to control (minimizing necessary input).
As others pointed out, making a unicycle taller makes it "more stable"
and easier, but it can never be truly stable.
A little late responce to this: I totally agree with this point of
view. The human must be calculated in. If there is to be a real
progress of the evaluation of the stability of the python, then one
needs to know what is easy for a human to control and what is not. But
this depends on the amount of learning this particular person does.
In my view a bike and a rider combination is acceptable when the
corrections needed on the part of the rider to keep the bike up does
not need much of concentration effort.
dirk
In 100 years of effort, no one has ever published a complete physical
description of the motion of hinged two-wheeled vehicles. There is a
commercial package I saw that can dynamically model almost all of the
important aspects of motorcycles. It is done with a package like ODE
http://ode.org/
http://ode.org/slides/igc02/s19.html
Ray
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