Hi all, if the cross beam with the two wheels is suspended and allows for some lean steering, this could work. You could attach some handle bars to it to control the leaning. - DirkS Gerald <bepb@xxxxxx> hat am 24. August 2011 um 21:16 geschrieben: > Hi Vi, > Very unusual, the for a four wheel configuration. But I think if the > tadpod would stand on an uneven surface, you might face hanging in the > air with the driven wheel. > > For the three wheel configuration, I think, the issue is a suitable > drivetrain. Thats why I dug out the Russian trike. If nothing else, the > hubs of the frontwheels are about what you need. > > But maybe a trike configuration python with a two part shell fairing > would also be an option. > Two part in a way that allows the fairing to bend with the trike. > > Gerald > > > > > > > > On 24.8.11 16:33 , Vi Vuong wrote: > > Hi Dirk & Gerald > > > > Here is a blend of several ideas from suggestions. It's a cross > > between a quad / outrigger / shopping cart / solar panel, and a pivot > > overload... http://www.youtube.com/watch?v=IK9ynAhUFUc > > > > Vi > > > > > > Hi Vi, > > a simple solution would probably be a non tilting, rigid front > > part with a central drive unit powering an axle that is connected > > to the drive wheels on either side. Since you cannot fall over > > that easily, you could probably lower the pivot angle to get more > > lean-steer effect (and seat rise for that matter) only on the back > > part on which you are seated. So the majority of the total mass > > would shift during a turn. > > Another idea i had some time ago was to have a similar setup, but > > not with a stiff axle through the center of the front wheel, but a > > stiff axle in front of those driven wheels. This axle would also > > act as a rotation center for a suspended front wheel on either > > side (putting a normal bikes rear wheel drive chain to that axle > > on either side). A "steeringhandle" would then be used to solely > > adjust the lean factor, but not the steering which is still > > controlled by your feet. > > I planned to have similar sprokets on the wheelaxle and the > > driving axle in front, to create not lag during suspension. > > Also, i wanted to use stiff ropes from paragliders connected to > > both front wheel centers and "hang" the frame onto them while > > connecting them with the lean-steer-handles. Leansteering would > > then pull the frame up on one side of the frame, while lowering it > > on the other... > > greetings, > > DirkS > > > > > > ------------------------------------------------------------------------ > > *From:* Gerald <bepb@xxxxxx> > > *To:* python@xxxxxxxxxxxxx > > *Sent:* Sunday, August 21, 2011 8:55 PM > > *Subject:* [python] AW: FWD tadpole for velomobile > > > > Hi > > I think there is or maybe was a front wheel driven tadpod from > > Russia, the S-327. On the page > > http://www.trike.ru/en/photos.php are some pictures off an three > > wheel drive tadpod trike, S-3 3x3 which could be an evolvement. > > But both are steered by handelbars. > > > > Gerald > > > http://dirk.steuwer.de