[python] Re: python Digest V8 #68

  • From: Howard Stevens <hstevens94@xxxxxxxxx>
  • To: python@xxxxxxxxxxxxx
  • Date: Wed, 25 Aug 2010 04:29:00 -0700

I would agree with Georges comments that although the hip joints may be
aligned with the pivot transversely, they are not aligned longitudinally, ie
they are displaced laterally and therefore will impart some lateral force on
the BB.  Also it seems that I am not the only one who has placed the pivot
at the front edge of the seat.  Looking at the gallery on the Python webpage
it looks like the following bikes have done likewise....Torbens, Laurents,
Rays, Marcels and also Jukka2, Jaculus, and BHP.  So I wonder if any of them
had PSI problems and how they solved them.
And regarding the PX5, Yes Jurgen, I think it would be wheel flop which
would be very uncomfortable as it would lead to rider flop!  I played around
with attaching the seat to the front section and it didn't feel good!
Anyway I am now going ahead with my trike construction with a pivot angle of
53 degrees but I will of course raise the seat to its original position.
This in turn will decrease the negative trail a bit, so I hope that wont
affect the steering adversely.....it should improve it if anything,
shouldn't it?  I will write again to the Python mailing list after testing
the new trike......hopefully with no further problems.  Thankyou all for
your assistance.  Cheers  Howard

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