**6.6 Tilt rotor mechanism**

Unmanned aerial vehicles with vertical take-off and landing capabilities take off and land vertically. It takes off vertically from the ground, then transitions to a stage when the tilt-rotor mechanism is utilized to tilt or rotate the motors about the y-axis (body-fixed frame) in order to take off vertically and cruise like a fixed-wing. To lift the fixed-wing aircraft, the VTOL UAV has four rotors at the tips of the wings. During the take-o\_ phase from the leading edge of the, the leading-edge motors face upwards, while the trailing-edge motors face downwards. During the cruise, the rotors in the front operate as tractors, while those in the back act as pushers. The C.G. is located at

**Figure 9.** *Tilt rotor mechanism.*

*Unmanned Aerial Vehicle for Agriculture Surveillance DOI: http://dx.doi.org/10.5772/intechopen.104476*

**Figure 10.** *Camera housing and the FLIR Vue pro R640.*

the intersection of motor diagonals, ensuring that no superfluous seconds are generated. Through a spar, the tilt-rotor system is connected to the wing (**Figure 9**).
