Below are individual sketches.
This sketch features an aerodynamic front to back and left to right symmetrical design in order for the AEV to be able to move backwards and forwards without much resistance. It only has two motors because the weight of a third motor is much more of a trade off for extra thrust power.
This sketch features the streamline shape, which can decrease the air resistance to a relatively lower level and save energy. The propellers are positioned symmetrically to reach a higher running speed when all motors are running.
Below is the final team sketch.