Need help with Engineering design project!! For our low level engineering design class we have a semester long project. Im going to explain the project as clearly as possible. It is a design competition in which we have to build a vehicle. This vehicle must utilize the potential energy of 5 gallons of water 6 ft off the ground. This water will travel through 1.25" pvc and make a 90 degree turn parallel to the ground. The water will come out here at the ground and somehow give our vehicle some type of energy. The goal of this competition is to harness this energy then pick our car up and move it to the start line. The car must travel 30 ft from the start line. Any distance it travels after 30 ft is considered 30 ft so we dont want to lose any efficiency here. The cheaper we make it and the heavier we make it the more points we get. My team intends to put a nozzle on the end of the pvc to concentrate the outpour of water to spin a small generator which will in turn charge a battery. This battery will have a switch that channels the power to a small dc motor that turns the axels on the vehicle. My team and I went to a specialty electronics store today and they had no small generators, more importantly one of the guys there told us that there was no way that 5 gallons of water going through a concentrated nozzle would not provide enough power to charge the battery enough to power the motor to propel our car 30 ft. Is he correct? I feel as though if we get the correct generator battery and motor combination then this will work. When I say combination i am talking about voltage/amps/watts etc. If it will work then what combination should we go with? We want to make our car as heavy as possible but ensure that it travels 30 ft. What does everyone think?