Here are couple of designs with positive trail and "rise" effect, but the rigid frame makes non-reptile ..:..:..(: http://www.google.com/search?q=dirtsurfer http://www.youtube.com/watch?v=qRL8eohthe4 Vi >________________________________ >From: bren102 <bren102@xxxxxxxxx> >To: python@xxxxxxxxxxxxx >Sent: Tuesday, July 26, 2011 2:57 PM >Subject: [python] Re: Fw: Positive Trail using Hubless Wheel? > >Hmm, it seems to me not necessarily a flevo or speculoos type steering as they >have no seat rising effect to aid stability. > >As a technical exercise - looking at Dirk's python, extend the steering head >forward horizontally to within the front wheel, but not past the front wheel >axle, maintaining the same steering angle until the trail is positive. > >The seat rising effect still applies as the steering head is still at the same >angle and is not horizontally higher than the front wheel axle. > >So, a python with positive trail! > >Maybe I should create a diagram? > >Regards, > >Brendan > > >--- On Mon, 7/25/11, Michael Ostermeier <list@xxxxxxxxxxxxxxxxxx> wrote: > >> From: Michael Ostermeier <list@xxxxxxxxxxxxxxxxxx> >> Subject: [python] Re: Fw: Positive Trail using Hubless Wheel? >> To: python@xxxxxxxxxxxxx >> Received: Monday, July 25, 2011, 3:48 PM >> Hi, >> >> bren102 wrote: >> > Perhaps the rider can be seated higher to maintain hip >> alignment with the steering axis? >> >> Yes, but then you wont have a lowrider and end up having a >> Flevobike. >> >> >> >> […] may allow a python with positive >> trail to be built. >> >> This will get you a speculoos-type bicycle. >> >> Regards >> >> Miche >> >> PS: see: http://en.openbike.org/wiki/Front_Wheel_Driven_Bicycle >> ============================================================ >> >> This is the Python Mailinglist >> >> //www.freelists.org/list/python >> >> Listmaster: Jürgen 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: Jürgen Mages jmages@xxxxxx > >To unsubscribe send an empty mail to >python-request@xxxxxxxxxxxxx >with 'unsubscribe' in the subject field. > >============================================================ > > > >