Advanced R&D Test 3

For this test, Team Q had noticed that the two motors on the AEV were not operating at the same power levels. The back motor always took more power to travel as fast as the front motor. As a result, the team decided to find out how much the difference in power is by analyzing the engines’ efficiencies and at what speed both engines were equal to each other. For the first part of the test, each motor was run at different power levels for three seconds each time. For the latter part of the test, both motors were run at differing speeds in opposite directions of each other, until the AEV did not move forwards nor backwards.

Back and Front Motor Comparison

Motor Power Back (Grey) Motor Efficiency (m/J) Front (Orange) Motor Efficiency (m/J)
30% 0.007038488 0.153044263
35% 0.016798794 0.151332734
40% 0.025660967 0.229283469
45% 0.041234226 0.259259307
50% 0.060084093 N/A
55% 0.109797712 N/A
60% 0.12896002 N/A
65% 0.137709808 N/A
70% 0.152244064 N/A

From this data, the back motor must travel at around 2.376 times the front motor’s speed in order to be as efficient.

 

At 30% power with the front motor, the back motor at 59% power equaled the front motor’s speed and the AEV did not move.

 

This signifies that the back motor must perform at 1.967 times the front motor’s power in order to output the same speed. Since the back motor has to travel at a higher power to improve efficiency than it must to equal the front motor’s speed, the back motor is overall less efficient than the front motor