说明：  A simple low cost AFV solution would provide an attractive alternative to several civilian applications where a helicopter would traditionally be used. Practical applications could include: traffic surveillance, aiding search and rescue operations, looking out for forest fires, etc. The objective of this thesis is to build and experiment with a low cost prototype AFV. This involves constructing a vehicle control system, as well as evaluating various design features and building materials. The vehicle will be propelled using four motors and propellers mounted to a fuselage. The design details will be discussed more extensively later in the thesis