Abstract: The invention is a novel system for monitoring a plurality of functions and conditions of a vehicle and providing a graphic presentation and recordation of torque and horsepower as well as other factors contributing to or depreciating a vehicle's performance as well as concurrently displaying manufacturers established parameters for on-board, live comparison of actual performance with expected design performance. Externally visible components of a display panel includes a group of separate analog and digital signal visual display means for indicating the approximate value of the operating parameters. All information is reported live and updated by the on-board computer. When the vehicle's accelerator is fully opened, a switch is engaged, and if other necessary conditions are met, the torque corresponding to the RPM is plotted concurrently with the manufacturers established parameters and remains graphically presented on the screen until cleared.

Abstract: An arrow vane which is of a solid one-piece construction and of a soft flexible material such as polyurethane. The vane has a base portion and an integrally formed fin with corrugations therein. The corrugations are at a 45.degree. angle with respect to the base portion. The fin also has openings with V-shaped edges therethrough which permit air to pass through the fin for improved accuracy.