[python] Re: AW: Re: AW: AW: Re: Twist-Python
- From: "dirk@xxxxxxxxxx" <dirk@xxxxxxxxxx>
- To: python@xxxxxxxxxxxxx
- Date: Mon, 25 Jun 2012 20:36:38 +0200 (CEST)
Gerald <bepb@xxxxxx> hat am 24. Juni 2012 um 08:44 geschrieben:
> Hi Dirk,
> You are right, it is the frontpart off the pivot which is compressed. Seems I
> was somehow confused. Maybe I better not write about bike geomety after
> midnight.
>
> Gerald
>
> -----Ursprüngliche Nachricht-----
> Von: "dirk@xxxxxxxxxx" <dirk@xxxxxxxxxx>
> An: python@xxxxxxxxxxxxx
> Gesendet: Donnerstag, 21. Juni 2012 16:05:31 GMT+00:00
> Betreff: [python] Re: AW: AW: Re: Twist-Python
>
> Hi Gerald,
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>
> i actually think, it should be the front part, that recieves pressure while
> the
> rod in the middle is being pulled out - at least if the rider is sitting.
> Given a very high pedal position, high pedalling force with low rider weight
> and
> the rider leaning with the upper part of his back against the seat could
> reverse the situation in theory, but then, the inverse pendulum effect should
> be
> reversed as well, since you are pulling up the bottom bracket.
>
> regards,
> DirkS
>
>
> Gerald <bepb@xxxxxx> hat am 20. Juni 2012 um 00:23 geschrieben:
>
> > Hi,
> > sorry, I think I have to correct myself. Obviously, its rather the rear part
> > off the disk that is beeing pressed together by the weight off the rider.
> >
> > Gerald
> >
> > -----Ursprüngliche Nachricht-----
> > Von: Gerald <bepb@xxxxxx>
> > An: python@xxxxxxxxxxxxx
> > Gesendet: Dienstag, 19. Juni 2012 20:40:17 GMT+00:00
> > Betreff: [python] AW: Re: Twist-Python
> >
> > Hi,
> > first off all, I too, like the flat construction off the pivot. This will
> > allow for a even lower seat position.
> > If I am not much misstaken, only the frontend off the disks will be pressed
> > together due to the load on the pivot.
> > One or two coaster blocks - I hope the term is right - on or in stead off
> > one
> > off the disks might even improve the pivot.
> >
> > BR Gerald
> >
> > -----Ursprüngliche Nachricht-----
> > Von: "dirk@xxxxxxxxxx" <dirk@xxxxxxxxxx>
> > An: python@xxxxxxxxxxxxx
> > Gesendet: Montag, 18. Juni 2012 12:22:28 GMT+00:00
> > Betreff: [python] Re: Twist-Python
> >
> > Hi,
> >
> > i suspect a lot of friction/wear, especially on the outer end of the discs,
> > since they travel a lot when turning. However, this might turn out as a
> > wanted
> > damping effect, potentially reducing psi...
> >
> > I think, there are bearings available, that have a similar diameter to these
> > discs, but aren't prone to friction.
> >
> > greetings,
> > DirkS
> >
> >
> > "Jürgen Mages" <jmages@xxxxxx> hat am 16. Juni 2012 um 07:53 geschrieben:
> >
> > > I also have thought of such seat swivel bases some years ago, but
> > > abandoned the idea: The central bolt seemed too weak and I was too lazy
> > > to enforce it. The ukranian version might last without too much wear.
> > > Time will proof if it works ... anyway it's a very smart idea.
> > >
> > > Jürgen.
> > >
> > > On 16.06.2012 05:26, Vi Vuong wrote:
> > > > Having to use head tube for pivot exclusively so far, I can
> > > > appreciate the compactness of the disk. Pivot placement seems
> > > > conveniently good for minimum PSI. I am wondering if a seat swivel
> > > > base can be used as a disk pivot, relatively inexpensive but maybe a
> > > > bit heavier...
> > > > https://www.google.com/search?q=Boat+Seat+Swivel&tbm=isch
> > > >
> > > > Vi
> > > >
> > > >
> > > >
> > > >
> > > >> ________________________________ From: Jürgen Mages <jmages@xxxxxx>
> > > >> To: Python Mailinglist <python@xxxxxxxxxxxxx> Sent: Friday, June
> > > >> 15, 2012 5:41 PM Subject: [python] Twist-Python
> > > >>
> > > >> Hello folks,
> > > >>
> > > >> some inventive stuff from Ukraine:
> > > >>
> > > >> http://hpv.com.ua/2012/04/twist-%D1%81-%D0%BF%D0%BE%D0%B4%D1%80%D0%BE%D0%B1%D0%BD%D0%BE%D1%81%D1%82%D1%8F%D0%BC%D0%B8-2/
> > > >> http://hpv.com.ua/2012/04/twist-python/
> > > >>
> > > >> that disk-pivot is definitely new to me!
> > > >>
> > > >> Cheers, Jürgen.
> > >
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