Paddle Wheel Catamaran - swims against stream

thingiverse

The "Paddle Wheel Catamaran" is a swimming boat that effortlessly teaches fundamental laws of physics. With an attached cord, the boat can swim against the river's current. As a result, the third Newton's law of motion in classical mechanics is clearly illustrated: "To every action, there is always an equal reaction; or the mutual actions of two bodies upon each other are always equal and directed to contrary parts." - Isaac Newton (1729) Print Settings Printer: Flashforge Creator Pro Rafts: Yes Supports: No Notes: If scaling is off, try multiplying by 10. The dimensions of the Paddle Wheel Catamaran should be roughly: Length: 200 mm Width: 130 mm Height: 88 mm I designed this boat using Autodesk Inventor 2016. As a kid, my father taught me to build a boat like this from wood. Therefore, the design is based on my memories. Project: Paddle Wheel Catamaran Overview & Background: This project teaches fundamental laws of mechanics. By completing this project, you will understand how the boat swims against the current. Objectives: Students of all ages can learn from this project. Its surprising turning point makes it easy to fascinate people. Audiences: Since mechanical principles are easy to understand, the appropriate age is about six years old. Kids in primary school should be able to learn from participating in this project. Subjects: physics mechanics engineering Skills Learned: By completing this project, you will gain skills in: Mechanical winches The behavior of paddles in flowing water Understanding of Newton's third law The shape of boats Activity: After printing the parts, drill a hole into the red highlighted part. To attach a cord, use a 1-2mm drill. Thread the cord through the hole and secure it with a knot. Plug the paddle to the boat frame as shown in the cover photo. Once assembled, hold the end of the cord and place the boat in some flowing water. Initially, the flow will move the boat until the cord is tight. The water will try to push the boat away from you. By holding the cord tight, the force on the cord corresponds to Newton's third law: Newtons Third Law: Action = Reaction Once the cord is tight, the boat stops and the flowing water sets the paddle in rotation. While the paddle starts rotating, the cord is wound up, and therefore the boat moves towards you. Duration: It would take about one lesson to complete this project once the boat is built. Preparation: Students need no prior preparation.