recently i have just constructed my own quadcopter using the following parts purchased from hobbyking:
Flight controller: HobbyKing KK2.1HC Multi-Rotor Hard Case Flight Control Board With Remote Programmer
Motor: 4 x Turnigy D2836/8 1100KV Brushless Outrunner Motor
ESC: 4 x Hobbywing X-Rotor ESC - 40amp (OPTO)
Lipo Battery: Multistar High Capacity 3S 4000mAh Multi-Rotor Lipo Pack
Tx/Rx: Turnigy 9X 9Ch Transmitter w/ Module & 8ch Receiver (Mode 2) (v2 Firmware)
Frame: S500 Glass Fiber Quadcopter Frame with PDB 480mm
Power distribution board: Turnigy Multi Rotor Power Distribution Board
Propellers: HobbykingÃ¢â€žÂ¢ Propeller 10x4.5 Black (CW/CCW) (4pcs)
But was unable to lift it off the ground. Yes I did carried out the ESC calibration which is
- Props off
- Turn FC (Flight Controller) Ã¢â‚¬Å“OffÃ¢â‚¬?
- Tx Ã¢â‚¬Å“OnÃ¢â‚¬?
- Throttle to Ã¢â‚¬Å“MaxÃ¢â‚¬?
- Press down buttons 1 & 4.
- Keep pressing until last step
(Releasing the buttons early will abort calibration)
- Turn Ã¢â‚¬Å“OnÃ¢â‚¬?FC
- Wait for the ESCÃ¢â‚¬â„¢s to beep its full throttle calibrated signal
(Takes a few seconds)
- Lower throttle to Idle
(Wait for the throttle idle calibrated signal)
- Release button 1 & 4
I'm pretty sure I did the above steps correctly by verifying that all 4 x motors spin simultaneously upon throttle up.
I also carried out the receiver test (found that rudder and elevator are inverted, so corrected them using the Tx), Sensor test (All ok), ACC calibration was carried out, motor layout set to X configuration.
Lastly I did make sure that all the motors are actually spinning in the right direction (according to the motor layout); motor 1 (front left) turns CW, motor 2 (front right) turns CCW, motor 3 (rear right) turns CW and motor 4 (rear left) turns CCW. The motors that are initially spinning at the incorrect direction are corrected by having any of the 2 motor wire (motor has 3 wire: red, black and yellow) swapped position (Learnt that from a youtube tutorial). The appropriate propellers are also carefully installed on the right motors; CW propeller to CW motor and CCW propeller to CCW motor.
Observation: Upon throttle up, quadcopter wasn't vibrating too much (seems stable) but surpass the 40 or 50% throttle (approx), the quadcopter tends to flip to one side (it seems that one side tends to have greater lift then another, If I do remember correctly, it was the front arms that have greater lift as compared to the rear arms).
FYI, I do not have the AUX channel of the KK2.1 HC connected to the channel 5 of the Rx as the slot is taken up by a power cable (5V) used for powering the flight controller from the power distribution board. Reason is because I have actually mistakenly purchased an OPTO ESC instead of an ESC with BEC. BEC comes with additional power (red) wire which can power up the flight controller at M1, since OPTO does not has the additional red wire, my only solution is only to power up the board using the reciever channel (AUX channel).
The test flight was carried out in my living room and I have read about how ground effect can affect the stability of the quadcopter such as if the room is not big enough you are creating your own turbulance which is coming back to your copter and making it unstable. Not sure if that is the problem (I doubt so), have not tested it out in an open field tho.
The following attached is the photo of my quadcopter (Blue arms are the front arms, white arms are the rear arms). Hope the gurus out there can help to solve my issue