That's a nice one (python_alu1) from a stability analysis perspective. There is a clear transition (depending on weight distribution on front vs rear articulated parts) between the tendency of the front wheel to turn left with a left lean at small weight, but to turn right with a left lean at heavy weight (which would rather correspond to a real person). Doesn't yet mean it's unridable, but it surely affects maneuvrability, as "standard bicycles" (e.g. upright) always exhibit a left turn of the front wheel for a left lean, whether loaded or not...
Pascal On Thu, 24 Mar 2011, Vi Vuong wrote:
Found someone testing weights in a bucket tight to the seat http://www.tietoportti.com/Nojapy%C3%B6r%C3%A4.htmlVi ________________________________ From: "dirk@xxxxxxxxxx" <dirk@xxxxxxxxxx> To: python@xxxxxxxxxxxxx Sent: Mon, March 21, 2011 10:31:58 AM Subject: [python] Re: pushable/ rideable Hi *, i think, too, this is how Juergen mentioned it - a rule of thumb.the rideability has the drivers weight inside the equation. If you push the bike on its own, its all down to the weight distribution of the bike, plus the point where one actually pushes the bike probably atcs as a leaver to bring down force on the pivot. Folks with higher seats should therefore do better...greetings, DirkS "Dirk Bonné" <dirk.bonne@xxxxxxx> hat am 21. März 2011 um 11:30 geschrieben:The baby python was very difficult to walk with, but found the handling qualities very good. The pythoon is easy to walk with, and has good handling too. Don't see any connection. Dirk On 18.03.2011 22:33, Jürgen Mages wrote: > Thanks Gerald, > > while pushing my P3, e.g. through a pedestrian zone, I rarely apply > downwards pressure to the back of the seat (which is my handle). It is > more like a smooth sidewards shifting to keep the bike on its track. > > However, of course, this pushable/rideable rule is just a rule of > thumb ... > > Cheers, > Jürgen. > > PS: Any pictures of your specimens available? > > >> Hi Vi, Hi Jürgen, I am not sure about the pushable requirement. Maybe >> a python beeing pushable is an indication that the pivot angle is >> right, but it seems, just that a python is rideable does not >> ensure it is also pushable. I do own two such specimens. Both of >> them ride quite nice and I do so in public traffic. >> >> For a python to be pushable, I think, beside having the pivot angle >> right you need to be able to put sufficient weight on the pivot >> while pushing. If the back of the seat is to far back, you may not >> be able to. >> >> >> Gerald > > ============================================================ > > This is the Python Mailinglist > > //www.freelists.org/list/python > > Listmaster: J???rgen Mages jmages@xxxxxx > > To unsubscribe send an empty mail to python-request@xxxxxxxxxxxxx > with 'unsubscribe' in the subject field. > > ============================================================ > > ============================================================ This is the Python Mailinglist //www.freelists.org/list/python Listmaster: J???rgen Mages jmages@xxxxxx To unsubscribe send an empty mail to python-request@xxxxxxxxxxxxx with 'unsubscribe' in the subject field. ============================================================http://dirk.steuwer.de
