From the Instructable:
- X mode flying
- MPU-6000 gyro & accelerometer sensor for flight stabilization
- USB battery recharging on the transmitter, the copter plugs into the transmitter to recharge
- When the copter plugs into the transmitter, the user can synchronize to a random radio frequency
- Controlled using a Wii Classic Controller, which plugs into the transmitter
- Running a modified MultiWii firmware, which is open source, written with Arduino and Processing
- Square center body is 1.5" by 1.5"
- Propellers are about 45mm in diameter
- Diagonal motor to motor distance is 110mm
- Motors are supposedly "X-Twin" spare motors, they come with the propellers
- Flight battery is a single Li-poly cell, 3.7V, 350mAH, 20C
- Controller battery is a single Li-ion cell, 3.7V, 1000mAH
- Uses ATmega128RFA1 microcontroller for both copter and transmitter
- This particular ATmega has a built-in 2.4GHz transceiver, 16 possible channels, 250kbit/s or 2mbit/s max depending on the standard being used.
- The "arms" and "body" are connected by locking slots, making them easy to build and repair
- Motors slide right into the arm
- Two layer 1.6mm thick FR4 PCB used (this is the default for a lot of PCB manufactures), the components are all on a single side (easy to assemble)
- All open source project, schematics + PCB + code all available. Heavy use of Arduino and Zigduino involved.