[python] Re: PX5
- From: Jürgen Mages <jmages@xxxxxx>
- To: python@xxxxxxxxxxxxx
- Date: Tue, 24 Aug 2010 11:41:44 +0200
Hello Howard,
thanks for putting this question again on the table. Riding the PX5 felt
very akward and I never really mastered it. Nowadays I would not blame
it to PSI. I think it was wheelflop, due to the heavy weight of the
front part. I should correct that on my website.
The theory of Dirk seems very good to me and I have some similar advise
on my website: There should be a balance between wheelflop an
selfcentering and then a little bit more of selfcentering should be
added then the geometry should be perfect (Alignment of hips and
steering pivot is mandatory!).
The question is: How to measure this balance?
My rule of thumb is: Hold the bike with one hand by the seatback and
notice how wheelflop makes the front part fall to one side. Then press
the seat slightly downwards (about 3 kg I guess) and now the front part
should center itself. Also it should be possible to push the bike
through a crowded area with only one hand at the seatback.
Maybe one day we can work out a less empiric way of determinating this
sweet spot.
Cheers,
Jürgen.
On 20.08.2010 04:56, Howard Stevens wrote:
The question remains open as to why there was PSI noticed on Jurgens
PX5. I can't understand how there could be any with the pivot BEHIND
the hips??...any comments Jurgen?
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