If you have a 3D printer, there are tons of projects to build frames and components, but this quadcopter is relatively easy to build and different from the X conventional frames.
The X design of the frame provides a lot more space for equipments and it’s more simple to build. With a cost of $56, the frame can be printed in about 8 hours.
On the printed frame is attached a MultiWii 328P flight controller with gyro, accelerometer, barometer, and magnetometer sensors. The controller is ideal for multicopters having expandability options and full programmability.
Using a Bluetooth module, the controller can be programmed wirelessly from any Android device.
From the ground, the user controls the quadcopter via the FrSky radio system. For complete instructions hit the link below.