Check out these topical, educational K'NEX building projects provided to help you make the connection between K'NEX building and real-life experience. All projects are in PDF format for easy printing.
Another name for a propeller is an airscrew - a screw that turns and cuts through the air. The long blades of the propeller are the screw's threads, and the propeller's shaft is the screw's body. A propeller turns very fast. Its blades cut through the air and push the air backward, which causes the plane to move forward.