3DR H520-G, Flight Manual

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3.6.2 INSTALLING THE PROPELLERS
• Each arm of the H520-G has a letter A or letter B labeled on it. “A” arms
have black center buttons; “B” arms have white center buttons.
• Each propeller has an A or B label etched into the blade. “A” propellers cannot
be attached to “B” motors, nor can “B” motors be mounted to an “A” motor.
• Match the A propellers with the A arms (black center button) and the B propellers with the
B arms (white center button). Place the prop on the motor, lightly press down while holding
the motor and turn the prop a quarter turn. A click will be heard and the center button will
slightly pop up. Hold the motor and test propeller security to assure a locked propeller.
3.6.3 MOTOR START AND LAUNCH
3DR recommends launching/landing on clean, level surfaces. Dust, dirt, sand, leaves and other lightweight
matter may reduce operational time and may cause mid-air failures from foreign object damage (FOD).
Launch and land from a clean surface such as clean concrete, wood, plastic or dry fabric. The launch pad
should be made of a heavy material and secured without the sides lifting from the rotor wash. Ensure the
pad is large enough to accommodate the landing gear and downforce from the propellers.
Never launch directly from sand, soft soil or dirty concrete.
Prior to motor start, position the H520-G with the nose pointing away and the battery latch facing rearward
towards the pilot. Before you start the motors, ensure the launch area is clear of people and equipment.
To turn on the RC, press and hold the Power Button (in the middle of the ST10C) for two seconds.
Press and hold the Arming Button for one second and the propellers will start to spin.
Check for any irregularities in prop speeds, noise or vibrations.
Once the visual and auditory check has been performed, move the left stick upward, away from the pilot.
Do not hesitate to add maximum throttle input. The H520-G will lift off the ground. When the H520-G is
approximately 15-20 feet in altitude, release the left stick, the stick will center itself and
the aircraft will hold its altitude.