hey guys! i need your oppinion and advice/suggestions on somthing. My group for university has to design and build a small model car within the dimensions (300x300x700) mm that runs on air, using a dustbuster motor. i dont have the model name but we can assume the motor we're dealing with is quite weak. Now, there cant be any mechanical connection with the motor and the axle of the car- since we need to harness airflow. weight plays a crucial issue when designing such vehicles..air power is a relatively weak force. We cant use any explosives or dangerous materials. any words of advice would be great!