[python] Re: The old qustion of PSI

  • From: Dirk Bonné <dirk.bonne@xxxxxxx>
  • To: python@xxxxxxxxxxxxx
  • Date: Fri, 25 Jun 2010 14:25:57 +0200

Glad to hear it!

I can't find any good picture of the handlebars but you can see a
glimpse of them in this video right at the beginning:


These handlebars on my pythoon are 55cms wide. They are unnecesary wide,
but are a consequence of trying to ride with a pivot angle of 70 and 80
degrees (now I am back at 60degrees which seems to be an optimum).

On the baby python the handlebars were only 45cm wide. The handlebars
are specifically NOT for excerting high force - and thus are not for
turning. They just give the last measure of fine control that are not
possible by foot-steer only. They especially help at low speed, at high
speed, or in climbing situations. Practically all the pythoneers that
can obtain high speeds (60+kmh) have handlebars installed.


On 25.06.2010 13:43, Howard Stevens wrote:
> Hi again Dirk.
> Thanks for the suggestion....it works really well! I made a straight
> bar 430mm long and bolted it on top and 40mm in front of the main
> pivot joint.  It feels comfortable, as it gives a convenient support
> for the hands and has virtually stopped the PSI.  I think mounting it
> fore or aft of the joint probably doesn't affect the mechanical
> leverage, as the important leverage distance appears to be how far
> lateral to the pivot, the handgrips are placed.  THe handlebars
> are very little use for turning but great to stabilise the trike. 
> Also I was previously worried about crashing if my feet slipped from
> the pedals, but this gives another means of control. So look out!  I'm
> now cruising!!  Cheers Howard


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