186 pivots about the pivot pin 190 in the direction of the arrow 236 the hook portion 192 of the pivot arm 186 rotates in the direction of the arrow 236 out of the stop slot 194 this allows the trigger 196 to be rotated in the direction of the arrow 238 to the position shown in fig1 in fig1 the trigger 196 is pressed against the spring loaded switch 200 as the trigger 196 presses against the spring loaded switch 200 a signal is generated and sent to the processor 212 in response to the signal the processor 212 causes energy from the battery 214 to be provided to the motor 114 causing the output shaft 142 of the motor 114 to rotate in the direction of the arrow 230 of fig5 accordingly the drive wheel 140 which is fixedly attached to the output shaft 142 also rotates in the direction of the arrow 230 this rotational energy is transferred to the flywheel drive wheel 132 through the belt 138 rotation of the flywheel drive wheel 132 causes the axle 134 and the flywheel 130 to rotate in the direction of the arrow 232 the rotation of the flywheel 130 is sensed by the flywheel speed sensor 220 and a signal indicative of the rotational speed of the flywheel 130 is passed to the processor 212 the processor 212 controls the motor 114.