QAV250 Racing FPV Quadcopter

the FPV racing quadcopter is one of the best experience you can get from RC toy. this instructable will explain how you can build your own 250 class racing quadcopter, with FPV system to place your eyes in the sky

NOTE : this drone is not built for aerial filming, this is a sport quadcopter for racing. if you want to make a multi platform quadcopter, please visit my F450 quadcopter instructable.

parts for the quadcopter

1. qav250 carbon fiber racing frame
2. 4 EMAX MT1806 KV2280 Brushless Motors
3. 4 CF 5040 props
4. 4 SimonK Series 12A ESC
5. cc3d flight controller
6. 3s 1500mah lipo battery - good for 7 minutes of flight time
7. 2.4 Ghz, 9 channels transmitter and reciever module, if you want a cheaper radio system you can get a 6 channels system for 50$
8. male T-plug with wires

parts for the FPV system

• 1 2200mah 11.1v lipo battery (can power the goggles for 5 hours) - 10$
• boscam 5.8ghz transmitter and reciever set - 30$
• 4.3 inch tft display (you can use up to 7 inch display) - 14$
• micro ccd camera (you can use any ccd camera you want) - 9$
• foam box

building the quadcopter

the first step of building the quadcopter is building the frame, just follow the instractions you got with the frame and build all the chassis.

the quadcopter include 4 motors, 2 CW motors and 2 CCW motors, the motors installation order is:

front left arm - CW motor
front right arm - CCW motor
rear left arm - CCW motor
rear right motor - CW motor

when you install the motors, point the wires to the arm of the chassis.

the ESC has 5 wires and a plug, the 3 black wires needs to be connected to the motors.
for CW rotation you need to connect the wires straight from the esc to the motor (first ESC wire to first motor wire, second wire to second wire, third wire to third wire). for the CCW rotation you just need to switch between the second to the third wire. (first ESC wire to first motor wire, second wire to third wire, third wire to second wire)

connect and solder all the ESC red wires together to the T-plug red wire, and the black wires to the black one.

after you make all the connections with solder, you can connect the flight controller.

connect the ESC to the cc3d in this order

connect the motor output 1 to the front left ESC
connect the motor output 2 to the front right ESC
connect the motor output 3 to the rear left ESC
connect the motor output 4 to the rear right ESC

connect the 2.4Ghz reciever to the CC3D flight controller, just plug the connections from the reciever output to the cc3d inputs, (channel 1 to input 1, channel 2 to input 2, etc..) you need to connect at least 6 channels.

this is all the wiring you neet to make for the quadcopter, when you finish the wiring you need to update the cc3d firmware and make a calibration. the CC3D flight controller works with the exelent opensource openpilot program.
download the software and install it to your pc, follow the instractions in the open pilot UI and make the installation.

building the FPV system

i already made a full detailed instructable for making a cheap FPV wireless Goggles based on this quadcopter.

i will post more videos of this quadcopter very soon so please subscribe!