Drone Manufacturer: Yamaha
Drone Model: R-MAX
Pilot Qualifications: Unknown Status
Pilot Flight Experience: Unknown Hours
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During initial climb, the pilot received a low rotor speed warning and returned the remotely piloted aircraft (RPA) to the landing site. During landing, the pilot encountered control issues due to the low rotor speed and the RPA subsequently struck a rock resulting in minor damage to the rotor blades.
Loss of control.