[python] Re: your Jetrike

http://personal.eunet.fi/pp/davinci/osa4eng.html

His trike has a python style drive train (or the Python has a Hipparion
style drive train -- depending on how you look at it ;-) ) and he
recommends a wheelbase of between 900 and 1200, with 1050 being about
optimal. Yours looks like it is quite a bit longer.


The wheelbase is 1550 mm.



However, re-reading 25mhz account of his PC2 riding test,
http://www.freelists.org/archives/python/10-2005/msg00017.html he
concluded that 1200+ was preferred. So maybe this is not the biggest issue. 

No, the SUV is longer.
It would be much better, if there is a box on the rear frame. I remember the FlevoTrike. Withot box it was very wonky; with box it was stable. the box has a whight of round 15 KG. 



What is your seat height and pivot angle?


30 cm and 67°



Your geometry looks as though it is essentially pivoting around the
front contact patch like a normal bike, with an elastomer to dampen it a
bit. This would lead me to suspect that it would be important for your
design to work well as a 'normal' bike does rather than as a trike. So
the long wheelbase would be a problem, as others have noted, a long
wheel base it less twitchy if you can get it balanced, but harder to get
started on.


I will see what happens, when I cut off the rear frame :-))

Mark
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