A main requirement given for the designs by the national park is that it needs to be energy efficient. With the energy supply being limited in the park the study of efficiency had to be done to find the most efficient way to power the designs. A common for of power is wind power through the use of propellers. The goal is to determine the efficiency the propulsion system by setting the input power supplied to the motor, and measuring the power output from the electric motor and the propeller using a thrust stand. The wind tunnel and the different propellers that could be used for the design is what was used for this lab. A type pushed or puller direction was given in terms of the placement of the propeller in the wind tunnel. Then propeller was put in the wind tunnel and the percent power was continuously increased then the current was logged based on the indicator. After the current was taken down the thrust and RPM was calculated and used to graph against the given data to find the percent error in the data.
From all of this data the results of all the propellers were compared to each other to find the most efficient one to use of the further designs. The type EP- 3030 was decided as the ideal propeller and the one that will be used on the further tests and labs.