> //-------------- Original Message: --------------
> Hi!
> I started my own Python (Already some weeks ago actualy).
>
> Some bits about my Python in making:
> The Frame will be TIG welded from Aluminum.
> (Oddments that I got from a nearby workshop working with Aluminum)
>
> I intend to use 28x1,6 (23-622) weels that come from a trekking bike.
> (My inseam length of about 86cm, so I hope this will work out.)
I have about 91cm inseam and 622/23 (that is narrow tires - nothing like 1,6"), and have the seat a bit back, but the BB pretty close to the wheel. I think you will be fine, but don't make too big tolerances. http://www.youtube.com/watch?v=afUoLpVzjdo
>
> The pivot angle is about 60 degrees. It will be possible to add or take
> a few degrees by adjusting the rear or front suspension.
>
> Maybe someone can help me with a few answers:
> 1) Did anybody tried to build a Python using a coaster break? Is it
&
gt; worth getting a (used) gear hub with coaster break?
> On fist impression the idea seems to nice because:
> *You would be able to use the break while still have the hands free.
> *It would solve the issue of having to build and fix the sockets for a
> V-brake.
I don't like the restricted back movement of pedals on my recumbents. You will love a steerer anyway, so you could choose a hub gear with a roller brake for simplicity.
> On second thought, I am a bit unsure if it is possible to use the break
> and still steer the bike.
dunno.
> 2) Did anybody try and use slide bearing in stead of a ball-bearing for
> the pivot? I got myself to ball-bearings but I am a bit unsure if the
> higher friction of a slide bearing would not improve stability of the
> python. Any experiences?
>
Friction in headsets cause unstability - small corrections on a binding headset beco
mes big corrections because af the force needed to start the correction. Try tightening the headset on a "normal" bike or a motorbike and take it for a spin if you dont believe me.
> Thanks for answers or comments!
Good luck with the project!
Cheers,
Torben
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