[python] Re: Python, of course.

If the bike could be modelled reasonably, then a survey of people's python 
results and geometries could could be used as matrix factors and solved for. 
This would give a fuzzy representation of what human adult reflex response is, 
I think.

Ray


At 02:25 AM 9/12/2005, you wrote:


>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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