[python] Re: Abs workout from python?
- From: Vi Vuong <vi_vuong@xxxxxxxxx>
- To: python@xxxxxxxxxxxxx
- Date: Tue, 5 Apr 2011 21:28:22 -0700 (PDT)
Hi Rob,
My conduit tube frame & coroplast seats have been ~35deg for lower back and
~25deg for upper back, so ~30deg average in the middle bend, which is not as
easy to measure as the flat sections. I use an inclinometer like this
one
http://www.wizardsatellite.co.uk/index.php?main_page=product_info&cPath=33_69_86&products_id=115
However, on python I notice that my upper back tend to lean forward a little,
so
I started using 35deg for the upper back as well. Higher angle ~45deg, I start
to slip forward out of the seat. Maybe when I gain more experience, I can lay
back a little more, and use the headrest also.
Good seat contour / contact is more important on python as the back is used to
control the bike. I have good experience with artificial grass pads, good for
ventilation also http://en.openbike.org/wiki/File:GuineaPigSeatPad.png. I plan
to check out foam liner next like
Malric's
http://1.bp.blogspot.com/-fe3VeP7LQEc/TYeFuZCydUI/AAAAAAAAA8E/UDvAZ5QZ5UE/s1600/DSCN5629small.jpg
Hammock seat design that Jürgen used is something worth studying, as it may
have
the best contour / contact, and angle (adjustable?).
Vi
________________________________
From: jan <jlaube@xxxxxxxxxx>
To: python@xxxxxxxxxxxxx
Sent: Tue, April 5, 2011 7:24:10 PM
Subject: [python] Re: Abs workout from python?
Hi Rob
It seems to me that all you need is a protractor and lots of pictures of
pythons. Then measure the angle of the mid part of the seat from the
horizontal. This method gives the same results as a number of manufactures
specs.
Good luck
Jan
From: Rob Raymakers
Sent: Tuesday, April 05, 2011 2:18 PM
To: python@xxxxxxxxxxxxx
Subject: [python] Re: Abs workout from python?
Hello,
i'm gathering specifications of the diffirent parts to build a python bike. I
got all the sizes/angles/measurements but I can not find how to
calculate/measure the angle of a seat. Searches on the internet only give me a
range between 19-30 degrees, but not how to measure the angle. Can anyone
explain it to me so i can finish my 3d model.
Rob
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