Hi, no cyberbricks from me. You are right that it will be similar to lighting the seat load, and if "the hanging pendulum effect" really is an self-stabilizing concept in itself, then you are right that it will destabilize things. However I find it very probable that "the hanging pendulum effect" makes the bicycle rideable by amplifying pivot angle feedback to the rider instead of making the bike inherently stable. Rasmus "daryl bender" <darylbender@hotm Til: python@xxxxxxxxxxxxx ail.com> cc: Sendt af: Vedr.: [python] Re: some thoughts python-bounce@fre elists.org 05-10-15 00:24 Besvar venligst til python Hi I think adding weight "in front of front wheel center OR behind rear wheel center" will tend to be similar to lightening the seat load which should reduce the hanging pendulum effect and tend to *destabilize* things. As I think about it I think you either want to a) Lessen aerodynamic tendencies to that would cause the front boom to veer to one side or the other. I stress the front boom because in essence (being articulated) the rear of the bike sort of follows the front boom or, if receiving less drag, may even try to pass it (sort of like folding). b) Use aerodynamics to generate a down force which would proportionately increase the hanging pendulum effect which adds stability. In essence a sort of ground effects. *I* have trouble visualizing how a) would be acheived but b) might be acheived with a sort of inverted wing (placed between the wheels) which would increase the down force. To see if this would work we need someone to experiment if adding serious weight increases high speed stability. Anybody want to Grinch-like load thier python up with 1000lbs of sandbags and race down a mile long hill . . . . . like say "Anne St" where 25Hz lives perhaps and see what happens? ;-D Cheers Daryl - now ducking for the cyber brick I'm sure will be thrown at me. ;-D >To: python@xxxxxxxxxxxxx >Subject: [python] Re: some thoughts >Date: Fri, 14 Oct 2005 18:43:44 +0200 > >Good point about center of pressure related to center of gravity. > >Weight added in front of front wheel center OR behind rear wheel center >should stabilize the whole, as the weight counters the side pressure >(avoiding the middle part falling to the wind side). >Unfortunately, weight in front might increase wheel flop and make for >understeer. > >However , didn't someone on this list put a battery or similar weight >behind the rear wheel and report increased stability? >Rear weight should also create a little oversteer. > >Or I am rambling... > >Rasmus > ============================================================ This is the Python Mailinglist at freelists.org Listmaster: Jürgen Mages jmages@xxxxxx To unsubscribe send an empty mail to python-request@xxxxxxxxxxxxx with 'unsubscribe' in the subject field. ============================================================