Accident Avoidance Characteristics of Unconventional Motorcycle Configurations

This paper presents the results of a program investigating the potential of unconventional motorcycle configurations for improved accident avoidance performance. Stability and obstacle avoidance characteristics were investigated analytically using mathematical models of both the uncontrolled and rider-controlled motorcycle. An analysis was also performed of the sensitivity of the optimum front-rear brake proportioning to road surface conditions and lateral acceleration. The results indicate that a low center of gravity, long wheelbase configuration has advantages in the moderate-to-high speed regime in terms of the margin of safety in performing an obstacle avoidance maneuver, and rider skill level required in braking. These advantages accrue at the expense of low speed maneuverability and controllability, and weight and overall complexity of the machine.