[python] Re: Python hatched and done some first "steps".

  • From: Tom Weldon <thomaslee222@xxxxxxxxx>
  • To: python@xxxxxxxxxxxxx
  • Date: Mon, 12 Apr 2010 04:52:02 -0700 (PDT)

Hi Gerald,
Great looking design...very clean simple lines. I am very interested in how your learning curve progressess, especially in terms of controlled turns.  If you don't mind, could you tell me how tall you are  (I'm guessing pretty tall considering you are using 28 in wheels). Oh, yeah, did you TIG weld it?  Please keep us posted Gerald...thanks.   Tom.

--- On Sun, 4/11/10, Gerald <gkuettner@xxxxxx> wrote:

From: Gerald <gkuettner@xxxxxx>
Subject: [python] Python hatched and done some first "steps".
To: python@xxxxxxxxxxxxx
Date: Sunday, April 11, 2010, 5:18 PM

Hi Friends and Fans of the Python!
I finished my Python yesterday and took a first try on riding it today.
The riding went better than I expect, still the longest distance I was able to ride without having to use my hands was about 30m (90ft).
Making turns intentional is still beyond me. Guess some practice is still needed.

The frame geometrie is more or less classical - as far as classical applies to pythons:
Pivot angle: 63°
Trail:   -38
Seat Height: 32cm
BB-Seat Diff:  30cm
Ground clearance: 8cm
Wheelbase: 138cm
Wheelsize 28" (622)
Weight: 15kg


The handle bar is placed behind the seat - more or less only intended to have something to mount the  levers  for shifting hub and, later a rear break.
The front brake is provided by the coaster break of the shifting hub.

As I had no reasonable access to old bicicle frames, the frame contains literal no part of old bikes at all but consists of pieces of aluminum (AlMgSi0.5) that I got from a nearby workshop. Even the pivot consists of two non bicicle angular ball bearings. The weels and drive train obviously come still from old bikes.

Since I was very limited in means of space, there was nor full jib, only some supports to keep the single pieces in place while welding.



Gerald

Picture of Python




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