Hello Howard, why not put handlebars on your python? Your arms are the best dampers in the world. Dirk On 18.06.2010 04:46, Howard Stevens wrote: > Hi Pythonites. Like some others I have some problems with PSI with my > Python-like trike. The steering pivot is 100mm in front of the line > of my hips and I cannot get it closer than this with my design. I > have tried bungy cords which make it quite rideable but when peddling > up hills the PSI becomes more noticeable, despite paying attention to > pedalling style and gearing. My idea is like the old motorbike > dampers which reduced movements by increasing the friction of the > joint movements. (see the attachment) By having a hollow pivot pin > with a cam lever and skewer with a nut on the lower end, and adjusting > the nut at the lower end of the pivot screw you could adjust the > amount of friction and hence movement needed, but avoiding any locking > which could be dangerous. By releasing the cam lever at the top, all > the friction would cease and so you could easily turn. The friction > would be between the bottom aluminium plate and the carbon fibre base > of the front wheel housing. The old motorbike dampers had a couple of > bronze plates as well, which I understand made good friction plates. > Another thing I mentioned was the idea of putting a wide tyre on the > front wheel, thus giving increased traction for pulling on hills and > for braking. The extra rubber to road contact would also make the > wheel less likely to wobble, according to some experimenters. > So any comments ? Happy cycling Howard Stevens ============================================================ This is the Python Mailinglist //www.freelists.org/list/python Listmaster: Jürgen Mages jmages@xxxxxx To unsubscribe send an empty mail to python-request@xxxxxxxxxxxxx with 'unsubscribe' in the subject field. ============================================================