# 3.2. Physical inspection and preparation

## Physical inspection after aircraft assembly is completed, including:

1. Check if there is any damage or cracks on the fuselage;
2. Whether the buckle connections of each component of the fuselage are tight;
3. Make sure all the motors and propellers are tightly fastened;
4. Rotate the rotor and tail propellers manually, to ensure the propellers rotatenormally;
5. Check if the GPS and Video\&data link antennas are installed properlly;
6. Check if the airspeed tube is clear without any block.
7. Use 92# or 93# gas, 2T 900 oil, Gasline and oil mixing ratio with 25:1 or 30:1, use the gas can from Yangda to get the mixing ratio easily.

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