What is the easiest to build form of human powered propulsion for a cardboard boat(must be made of cardboard)? Answered
Me and a group of people are working on a cardboard boat and the propulsion has to be made mostly of cardboard. We want to use something better than paddles. I have been looking around to try and find something that can be adapted out of cardboard and have only found a couple of methods of propulsion.
1. paddle wheel
2. normal propeller
4. hydrofoil wing
Anything else that might work that is not in this list would be awesome. Remember, this is human powered so the RPMs will be low.