In this activity students explore how a propeller's size can influence the amount of propulsion they will get. They will build a simple set-up where they can record how many revolutions a certain propeller makes in a set time. This can be compared to the same set-up with different sized propellers. ...

Students will explore how changing gear ratios can increase the or decrease the propulsion they get from their propeller. This activity can also be done in conjunction with the Propulsion - prop size activity in this Underwater Robotics unit.

NOTE: The RCX should never be submerged in...