Quote:
Originally Posted by akima
Motorcycle Intersection Stoppie Crash
|
Regarding training:
Panic reaction of rider who was not ready to ride in traffic (not enough education and practice of proper reaction to that situation) and moving too fast for conditions (across the most dangerous place for motorcycles: street's intersection).
Please read:
https://www.ninjette.org/forums/showthread.php?t=80343
Regarding Physics:
Due to inertia, his/her CG and the CG of the bike tend to continue moving forward with the original speed.
Front brake and front tire are creating huge friction force pointing aft in order to get rid of the kinetic energy accumulated in those two CG's.
Watch his/her feet and legs not clamped onto the bike, allowing her CG move forward making the rear lighter and deprived of stability.
As the rear lifts up, the lever (horizontal distance) between CG and front contact patch shrinks making the lift effect easier to happen.
Once the weight vector coming from the CG (diagonal line in the schematic below) jumps over the front contact patch there is no more stopping effect.
Notice that the rear tire hit the door with double the speed of the CG: more kinetic energy to form that huge dent.
