[python] Re: Fwd: Re: Prothon

sorry for butchering the spelling of your name, JeŽreŽmy, but I'm in too much 
of a hurry to go for special characters,

I think that the idea of using a foam core is a good one. See that you may well 
be in Germany. Try Obi for some of their purple/pink insulation. It seems to me 
to have good gluing characteristics when used with wood and epoxy. If you're 
really concerned about it's taking punishment make a layup of 6oz glass / 
0.8-1mm veneer / foam core / wood veneer / glass . Try 18-20mm foam. you'll get 
a very light and durable seat. You can cut the foam into strips with a 
model-builders foam melter wire "saw" or with a table saw or bandsaw.

regards,
Ronald von Kannnochnichtschweißen

> -----Ursprüngliche Nachricht-----
> Von: "Jérémy Hanon" <J_HANON@xxxxxx>
> Gesendet: 03.04.09 23:14:59
> An: python@xxxxxxxxxxxxx
> Betreff: [python] Re: Fwd: Re: Prothon


> Hello Jürgen,
> in fact the seat is not satisfying yet, the mold i build for it was more an 
> experiment. I wanted to find out how stiff wood and Glasfiber would be. for 
> this i combined 11 sheets of Walnut with two layers Glasfiber. It is very 
> comfortable and quite stiff but the next one will be a lot more wraped around 
> my back and hips. I hope to feel more "anchored" with the rear then... Still  
> some things to do..;)
> Also i will certainly take an other wood for the next one, maybe hickory(?) 
> or hard maple. this should be stiffer. I would like to keep the surface woody 
> (hey iŽm a woodworker...), and hope that a better form will make it work 
> allready. Otherwise. well i have some foam here. 
> Thanks for your advices,
> Jérémy
> -------- Original-Nachricht --------
> > Datum: Fri, 03 Apr 2009 22:53:10 +0200
> > Von: "Jürgen Mages" <jmages@xxxxxx>
> > An: python@xxxxxxxxxxxxx
> > Betreff: [python] Re: Fwd: Re: Prothon
> 
> > Bonsoir Jérémy,
> > 
> > a picture says more than 1000 words. I see you took a lot of effort into 
> > the front part. I also like the metal/wood combination. Some good 
> > solutions for non-welders. What did you use for the steering pivot?
> > 
> > The seat however is not really suitable for a center-steered bike. As 
> > you steer with your legs the rest of the body has to be anchored with 
> > the rear part of the bike. Therefore the seat must provide as much 
> > contact area as possible. The problem with your seat is first its 
> > narrowness and second its smooth surface which supplies no "grip".
> > 
> > I think the bike would be perfectly rideable with a better seat.
> > 
> > Cheers,
> > Jürgen.
> > 
> > >> Hello again.
> > >>
> > >> so it seems that no one have realised a faired Python yet. or am i
> > >> wrong? I just can?t let fall this idea, lets see what time will
> > >> bring, maybe in a couple of years.... For the moment i am trying to
> > >> optimate and to ride my prototype (Prothon would be a nice name?)
> > >> wich is currently still not finished. It is not the bike i want to
> > >> faire, but i hope to find a good geometry and construction method for
> > >> it. It is made out of wood-rest and an aluminiumsheet (5mm). The
> > >> current weight is around 16kg, wich is ok, for me. It should be
> > >> possible to make it around 12 with other tires, different wood and
> > >> some more holes in the front part. For the moment it seems to be
> > >> reasonable to keep it a little stronger, so it might survive a while
> > >> my 95kg trying to smash it.... I would be very thankfull for any
> > >> suggestion, it is only a prototype and i would love to optimate it...
> > >>
> > >>
> > >> Jérémy
> > >>
> > >>
> > >> Ps:The pivot-angle is 63°, seat-angle aprox.43°.
> > 
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