Propulsion by propeller

This project consists of placing a propulsion system for a robot by means of a DC motor and a propeller.
It consists of three parts:
Propeller of four wings that will be linked to the motor shaft.
Protective casing of the propeller for greater security, together with the support of the motor.
Support that will serve to replace the motor DC and unite the propeller with its case to the robot.
All the measures can be configured so they can adapt to the necessities of each project.

http://www.youtube.com/watch?v=9YIwYe39Zu8