How can i make a "one way air nozzle" (a nozzle where air goes forward but not back)?
I'm making water rockets. pocket sized ones. those fly ~5 meters. i want to improve the results and move forward to bigger rockets, by making a one-way air nozzle. the air will need to go inside the rocket, but not out. i tried it with my simple bicycle pump, but the air leaks. please give me instructions or suggestions, and i cant buy a new pump. my rocket should meet the requirements of a simple, cool, pocket sized, homemade rocket.