At 08:32 AM 2/13/2006, you wrote: >Hello Tom, > >>I was thinking >>about the stability issue when coasting downhill, and it occurs >>to me that this is similar to the problem of a tractor + semi-trailer >>combination which wants to jackknife in the right (actually wrong!) >>conditions. Like the Python, there is a pivot (with 90 degree angle), >>drive is on the component forward of the pivot, and the weight is >>distributed between the forward wheels (through the 5th wheel >>pivot) and the trailer wheels. As long as the tractor is pulling the >>trailer, there is no problem, but when trying to brake the system >>can fold up. When I was looking into solving dynamics code, I saw that people were using ODE like http://www.ode.org/slides/igc02/s19.html and similar dynamic engines to simulate motorcycle behavior; a cycle is almost the same code as a semi, with Very narrow wheel base, two fixed parts to the wheels and a pivot. >Referring to the spooky feeling at 50+ km/h coasting speed, we >have not found a solution yet, but always welcome new thoughts. Have there been reports from the people that have an oil damper on their pivot? Ray ============================================================ 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. ============================================================