[python] Re: Fw: Positive Trail using Hubless Wheel?
- From: bren102 <bren102@xxxxxxxxx>
- To: python@xxxxxxxxxxxxx
- Date: Mon, 25 Jul 2011 07:02:21 -0700 (PDT)
Hi Dirk,
Your python site is great! If the steering pivot is kept at the same height
and angle while moved forward to just inside the front wheel, this should be
enough to make the ground contact point move forward of the tire contact point,
while also maintaining the seat rising effect. I understand seat rising effect
occurs due to the steering axis not being vertical.
I should just build one to experiment and then post the results :-) !
Regards,
Brendan
--- On Mon, 7/25/11, dirk@xxxxxxxxxx <dirk@xxxxxxxxxx> wrote:
From: dirk@xxxxxxxxxx <dirk@xxxxxxxxxx>
Subject: [python] Re: Fw: Positive Trail using Hubless Wheel?
To: python@xxxxxxxxxxxxx
Received: Monday, July 25, 2011, 3:33 AM
Hi,
i believe thats only possible, if the rider moves up while sitting further
at the front.
Also, the wheel has to be rather big, since the steering pivot still has to
be before the contact point of the front wheel, otherwise
there is not seat rising effect - i think...
greetings,
DirkS
"Jürgen Mages" <jmages@xxxxxx> hat am 25. Juli 2011 um 08:59 geschrieben:
> Hi Brendan,
>
> thanks, but how would you achieve the alignment of the hips with the
> steering axis? That is necessary to avoid pedal/steering interference
(psi).
>
> Regards,
> Jürgen.
>
>
> On 25.07.2011 05:22, bren102 wrote:
> > Hi,
> >
> > After reading my post below, I realized I should clarify how I
> > thought positive trail can be achieved - the steering pivot can now
> > be placed within the hubless wheel, allowing steering trail to be set
> > positive.
> >
> > Regards,
> >
> > Brendan
> >
> > --- On Sun, 7/24/11, bren102 <bren102@xxxxxxxxx> wrote:
> >
> >> From: bren102 <bren102@xxxxxxxxx> Subject: Positive Trail using
> >> Hubless Wheel? To: python@xxxxxxxxxxxxx Received: Sunday, July 24,
> >> 2011, 11:13 PM Hi,
> >>
> >> My first post after following the python list for a few years!
> >>
> >> I came across the following hubless wheel design idea online and
> >> immediately thought that its use may allow a python with positive
> >> trail to be built. How would a positive trail python handle? The
> >> addition of positive trail may cause a stronger self centering
> >> effect upon steering!
> >>
> >> Lunartic Hubless Wheel prototype:
> >>
> >>
http://www.thepadrino.com/2010/08/lunartic-cycle-bike-without-spokes.html?utm_source=wahoha.com&utm_medium=referral&utm_campaign=wahoha
> >>
> >>
> >> http://www.youtube.com/watch?v=cPsY2NfPJtw&feature=player_embedded
> >>
> >> Regards,
> >>
> >> Brendan Kingston, Ontario, Canada.
> >>
>
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