I am currently building a mini boat-like robot to clean the water from floating trash. I used two servo motors to move the loader that I have installed in front of the boat, and two 3 V DC motors installed in the back to allow the boat to move across the water. I also used Arduino to program my servos and motors. When I tried to test my robot in water, the two DC motors did not push the boat forward. Why didn't the air push my boat? Here are the materials that I used to build my robot:
- Two 1 L water bottles
- A small plastic box to hold the electric circuits.
- Another small plastic box to serve as a trash collector.
- Two plastic propellers (taken from a mini fan).
- A toy loader.
The total weight of the boat is around 700 g. The picture below is the robot I am working on: