#include <stdlib.h>
#include <stdio.h>

#define TRANSRATIO 2.72
#define PI 3.14159265359

int main(int argc, char **argv){

	double Kv = 3500;
	double Volts = 8.4;
	double Pinion_teeth = 36;
	double Spur_teeth = 72;
	double Wheel_Diameter = 4.35; //4.35;
	double Mph = 0;
	double tmp = 0;
	double motor_rpm, tire_rpm, spur_rpm;

	motor_rpm = Kv*Volts;
	spur_rpm = motor_rpm*Pinion_teeth/Spur_teeth;

	Mph = spur_rpm/TRANSRATIO;
	tire_rpm = Mph;
	//Mph = Kv*Volts*Pinion_teeth/Spur_teeth/TRANSRATIO;
	tmp = PI*Wheel_Diameter*60;
	Mph *= tmp;
	Mph /= 63360;

	printf("MPH: %lf\n", Mph);
	printf("motor rpm: %lf\n", motor_rpm);
	printf("tire rpm: %lf\n", tire_rpm);
	printf("spur rpm: %lf\n", spur_rpm);

	return 0;
}