After determining which propellers produced the most efficient results, the positioning of the propellers was changed between the base model and a new model.The chosen propeller blade design was the rectangular shaped blades. With the new model design, the propellers were placed farther away from each other. The new base configuration was a cross shape instead of the original T-shape. The AEV was ran using the same scenario as the base model, and data regarding the AEV’s power and distance were recorded (see below).
When the base configuration was changed, the team discovered something interesting. The cross shaped base did not seem to work, and the distance that the AEV traveled was extremely small (see below). The T-shaped base was determined to be the better model to work with. When the propellers were moved further apart, the AEV took a longer time in accelerating when compared to the base model.
Team N was able to conclude, based on the performance of the different propellers, which propellers worked best for the AEV’s efficiency. Team N was also able to make a conclusion on the positioning of the propellers on a new model versus the original one. The conclusion was that the AEV will go a farther distance on a T shaped model with the longer, rectangularly bent propellers. Data was gathered to show that when the straight, longer, rectangular propeller was used on the original model, the AEV failed to move at all (see below). On the longer, bent, rectangular propeller, the AEV went farther and faster than it did while testing other propellers. This helped to make a conclusion on which propeller worked best. Once that conclusion was drawn, data was taken to make a conclusion on which model works best with the chosen propeller. Data proves that the AEV went farther using the T shaped model than it did using the cross shaped model.
Cross Shaped Base
Cross Shaped Base- Power vs Distance
Code used:
celerate(4,0,25,3); //accelerates motor 1
goFor(1); //keeps motors 1 and 2 going for 1 second
motorSpeed(4,20); //sets motors 1 and 2 to 20% speed
goFor(2); //keeps motors 1 and 2 going for 2 seconds
reverse(4); //reverses motors 1 and 2
motorSpeed(4,25); //sets motors 1 and 2 to 25% speed
goFor(2); //keeps motors 1 and 2 going for 2 seconds
brake(4); //brakes motors 1 and 2