Quadrotor

Quadrotor is helicopter that has four rotors for stability.

Looking at making one using:
11.1v Brushless 13000-RPM motor for each rotor
11.1V 2200mAh Lithium Polymer Rechargeable Battery to power it
digital 1.7V to 2.75V 3-AXIS ACCELEROMETER
digital 2.4V to 3.6V 3-AXIS GYROSCOPE
5v RaspberryPi to calculate everything.

Looking at [1] for how to use the gyro and accelerometer together well.
Found out that the two opposite motors need to be going in one directions and the others in the opposite direction.
good link for info about quad rotors and making one: [2]