RaspberryPilot is an open-source project, if you are interested in making a quadcopter by raspberry pi, this project may be helpful to you.
Video:
Circuit:
RaspberryPilotApp (https://github.com/jellyice1986/RaspberryPilotApp) is an Android APP which is used to control RaspberryPilot, currently RaspberryPilotApp is the only tool to configure or drive RaspberryPilot.
There are two type of wireless communication system between RaspberryPilotApp and RaspberryPilot as below:
Type 1: use WiFi directly, the communication range is about 10 meters
Type 2: a 433 MHZ and 2.4 GHZ signal converter between RaspberryPilot and Android phone, the communication range can reach 200 meters