Stefan wrote: Hi everybody, I've been searching for other types of FWD trikes and found this: http://www.freedomryder.com/FRH-1.htm No pendulum effect, but positive trail. Stefan This model is a standard delta trike like many handcycles, (Draft, Top End, Schmiking, Wolturnus, Lightning, Greenspeed, Hall's Wheels, Varna, Principia) but Freedom Ryder do make the Superbike model (http://www.freedomryder.com/Superbike%20LC-1.htm) which really is lean steer with a self-righting effect. The axis is approximately 45 degrees with the pivot axis running through the centre of gravity. Probably has positive trail, but they don't show sude views. It has been raced on the US handcycle circuit for about 10 years, but the standard delta layout still dominates because lean steering requires some trunk control to steer reliably. Alejandro Albor races a similar system with great success,(http://www.awonalbor.com/thecompany.htm) but I think he's the only one who can handle it (Double amputee), and even he has a reputation for crashing a lot... All the best, Dan Chambers dan@xxxxxxxxxxxxxxxxxxxx -- ============================================================ 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. ============================================================