Aerial vehicle

An aerial vehicle comprising:

• a center body;
• two arm assemblies arranged at two opposite sides of the center body, respectively, each of the two arm assemblies including a proximal part and a distal part, and the proximal part being closer to the center body than the distal part;
• a power device including:
• two first rotor power assemblies each installed at one end of one of the two arm assemblies;
• and
• two second rotor power assemblies each installed at another end of one of the two arm assemblies;
• a driver mechanism mechanically coupled to the two arm assemblies and configured to drive the two arm assemblies to move relative to the center body to move the distal parts of the two arm assemblies between a first height position and a second height position different from the first height position;
• wherein:
• in a direction of a roll axis of the power device, the two first rotor power assemblies are closer to an installation site on the center body for installation of a load assembly than the two second rotor power assemblies;
• the two arm assemblies are configured such that when the distal parts of the two arm assemblies are at the second height position, a spacing between the two first rotor power assemblies is larger than a spacing between the two second rotor power assemblies;
• and
• the two arm assemblies are configured such that when the distal parts of the two arm assemblies are at the first height position, the spacing between the first rotor power assemblies is equal to the spacing between the second rotor power assemblies.