An unmanned aerial vehicle includes a plurality of rotors, a first type of rotation driver to drive one or more first rotors included in the plurality of rotors, a second type of rotation driver to drive one or more second rotors included in the plurality of rotors, and a controller configured or programmed to control rotation of the plurality of rotors by controlling the first type of rotation driver and the second type of rotation driver. The controller, when performing a landing operation, is configured or programmed to generate a difference between a first thrust that is a sum of thrust generated by the one or more first rotors, and a second thrust that is a sum of thrust generated by the one or more second rotors, smaller than that during hovering.

Example implementations provide fluid-borne vehicles comprising a body and a plurality of thrust vectoring modules, each thrust vectoring module comprising a set of thrust producing means, wherein a first thrust producing means, mounted on a first mounting bar having a first mounting bar axis, is rotatable about the mounting bar axis and the mounting bar axis is rotatable about an arm having an arm axis that is nonparallel to the mounting bar axis; and a second thrust producing means, mounted on a second mounting bar having a second mounting bar axis, is rotatable about the second mounting bar axis and the second mounting bar axis is rotatable about the arm axis that is nonparallel to the second mounting bar axis.

Example implementations provide fluid-borne vehicles comprising a body and a plurality of thrust vectoring modules, each thrust vectoring module comprising a set of thrust producing means, wherein a first thrust producing means, mounted on a first mounting bar having a first mounting bar axis, is rotatable about the mounting bar axis and the mounting bar axis is rotatable about an arm having an arm axis that is nonparallel to the mounting bar axis; and a second thrust producing means, mounted on a second mounting bar having a second mounting bar axis, is rotatable about the second mounting bar axis and the second mounting bar axis is rotatable about the arm axis that is nonparallel to the second mounting bar axis.

A rotary wing vehicle has a vehicle body. A gimbal assembly mounted to or within the body. A propeller assembly is mounted to the gimbal. The propeller assembly has first and second fixed pitch propellers. The gimbal assembly has a first gimbal rotatable about a first axis and a second gimbal rotatable about a second axis.

A rotary wing vehicle has a vehicle body. A gimbal assembly mounted to or within the body. A propeller assembly is mounted to the gimbal. The propeller assembly has first and second fixed pitch propellers. The gimbal assembly has a first gimbal rotatable about a first axis and a second gimbal rotatable about a second axis.

We describe a propeller-thrust-governing system (PTGS) for a propeller that is part of an aircraft. The PTGS includes one or more control surfaces that are located within an airflow of the propeller. The control surfaces are adjustable to reduce thrust produced by the propeller and are also adjustable to redirect the thrust.

We describe a propeller-thrust-governing system (PTGS) for a propeller that is part of an aircraft. The PTGS includes one or more control surfaces that are located within an airflow of the propeller. The control surfaces are adjustable to reduce thrust produced by the propeller and are also adjustable to redirect the thrust.

An aerial vehicle includes a center body, two arm assemblies arranged at the center body, a power device, and a driver mechanism mechanically coupled to the arm assemblies. The power device includes two first and two second rotor power assemblies. Each pair of first and second rotor power assemblies are installed at two ends of an arm assembly. The driver mechanism drives the arm assemblies to move relative to the center body such that distal parts of the two arm assemblies move between first and second height positions. In a direction of a roll axis of the power device, the first rotor power assemblies are closer to an installation site on the center body than the second rotor power assemblies. When the distal parts are at the second height position, spacing between the first rotor power assemblies is larger than spacing between the second rotor power assemblies.

An aerial vehicle includes a center body, two arm assemblies arranged at the center body, a power device, and a driver mechanism mechanically coupled to the arm assemblies. The power device includes two first and two second rotor power assemblies. Each pair of first and second rotor power assemblies are installed at two ends of an arm assembly. The driver mechanism drives the arm assemblies to move relative to the center body such that distal parts of the two arm assemblies move between first and second height positions. In a direction of a roll axis of the power device, the first rotor power assemblies are closer to an installation site on the center body than the second rotor power assemblies. When the distal parts are at the second height position, spacing between the first rotor power assemblies is larger than spacing between the second rotor power assemblies.

Described is an aircraft, in particular a drone, with a supporting body (2) and at least two propulsion arrangements (4, 8) arranged at a distance from one another on the supporting body (2), which are designed to generate a propulsive thrust in a direction of propulsion (8b). According to a first aspect of the invention, the propulsion arrangements (4, 8) on the supporting body (2) are each mounted so as to be pivotable independently of one another about a first axis of pivoting (6) extending at an angle to the direction of propulsion (8b) and a first actuating drive (10) is provided and designed to pivot the propulsion arrangements (4, 8) independently of one another about the first axis of pivoting (6). According to a second aspect of the invention, in which a trunk body (20) is provided, this trunk body (20) is mounted on the supporting body (2) so as to be pivotable about a second axis of pivoting (22) and a second actuating drive (24) is provided and designed to pivot the supporting body (2) relative to the trunk body (20).