The invention relates to a system (10) for remote and/or autonomous harvesting at least a portion of a tree, said system (10) comprising: a remotely and/or autonomously controlled means (110) configured for harvesting said at least a portion of a tree, a remotely and/ or autonomously controlled Unmanned Aerial Vehicle (100), UAV, comprising, at least one means for holding (105) said harvested portion of said tree and being configured for transporting said harvested portion of said tree away from the original location of the tree, wherein said system comprising at least one means for detecting said tree to be harvested, and a base station (120) for communication with said means configured for harvesting at least a portion of a tree and/or said UAV. The invention also relates to a method for remotely and/or autonomously harvesting a tree.

The invention relates to a system (10) for remote and/or autonomous harvesting at least a portion of a tree, said system (10) comprising: a remotely and/or autonomously controlled means (110) configured for harvesting said at least a portion of a tree, a remotely and/ or autonomously controlled Unmanned Aerial Vehicle (100), UAV, comprising, at least one means for holding (105) said harvested portion of said tree and being configured for transporting said harvested portion of said tree away from the original location of the tree, wherein said system comprising at least one means for detecting said tree to be harvested, and a base station (120) for communication with said means configured for harvesting at least a portion of a tree and/or said UAV. The invention also relates to a method for remotely and/or autonomously harvesting a tree.

The operational efficiency of a rotorcraft in cruising. The rotary wing aircraft, according to the present disclosure, has a main body and a plurality of motors provided in the main body for rotating each of the rotors, which are parallel to a reference plane. When the main body is inclined with respect to one direction of travel and flying in the direction of travel, the rotational speed of each of the plurality of motors is approximately the same.

The operational efficiency of a rotorcraft in cruising. The rotary wing aircraft, according to the present disclosure, has a main body and a plurality of motors provided in the main body for rotating each of the rotors, which are parallel to a reference plane. When the main body is inclined with respect to one direction of travel and flying in the direction of travel, the rotational speed of each of the plurality of motors is approximately the same.

The present disclosure relates to a rotorcraft. The rotorcraft according to the present disclosure has a parachute mechanism for releasing a parachute in a predetermined direction and an attitude control means for setting the aircraft to a specific attitude when releasing said parachute. According to such a configuration, the parachute can be deployed in an attitude suitable for its deployment, thereby reducing damage, etc., that may occur when the flying vehicle falls.

The present disclosure relates to a rotorcraft. The rotorcraft according to the present disclosure has a parachute mechanism for releasing a parachute in a predetermined direction and an attitude control means for setting the aircraft to a specific attitude when releasing said parachute. According to such a configuration, the parachute can be deployed in an attitude suitable for its deployment, thereby reducing damage, etc., that may occur when the flying vehicle falls.

A modular autonomous aerial passenger vehicle is provided to automatically transport any person or luggage or capable of being used by the defense organizations for monitoring without any interference or need of human pilot. The autonomous aerial vehicle is comprising of an aerodynamic main body having 4 fixed arms each and 2 foldable arms each of which further having a pair of propellers coupled at the edge of each foldable arm, one at the top and one at the bottom. Further, the autonomous aerial vehicle further includes a power management system; safety system; interior cockpit having a HMI and seating arrangement, where the HMI is a brain computer interface that acquires signals from the brain and analyses them to convert it into commands. It includes a display unit and manual control unit; primary and auxiliary battery modules, flight control unit, plurality of sensors and cameras and other safety equipment for safe functioning of the present autonomous aerial vehicle.

A method is provided for operating a vehicle that includes rotors driven by actuators to cause the vehicle to move. The method includes determining rotational speeds at which to drive the rotors to achieve a controlled movement of the vehicle. The rotational speeds include a rotational speed for a rotor of a pair of the rotors driven by a pair of the actuators. The method includes monitoring the rotational speed to detect that the rotational speed has approached or reached a defined avoid band of rotational speeds, and biasing the rotational speed to produce at least one biased rotational speed for respective rotors of the pair that is outside the defined avoid band. The method includes generating commands for the actuators based on the rotational speeds, and modifying the commands including those of the commands for the pair of the actuators based on the at least one biased rotational speed.

Multi-rotor rotorcraft comprise a fuselage, and at least four rotor assemblies operatively supported by and spaced-around the fuselage. Each of the at least four rotor assemblies defines a spin volume and a spin diameter. Some multi-rotor rotorcraft further comprise at least one rotor guard that is fixed relative to the fuselage, that borders the spin volume of at least one of the at least four rotor assemblies, and that is configured to provide a visual indication of the spin volume of the at least one of the at least four rotor assemblies. Various configurations of rotor guards are disclosed.

The invention relates to a system for remote and/or autonomous holding at least a portion of a tree trunk, said system comprising: a remotely and/or autonomously controlled Unmanned Aerial Vehicle (100), UAV, at least one remotely and/or autonomously controlled means (105) for holding at least a portion of a tree trunk attachable to said UAV (100), means for detecting at least a portion of a tree, means for detecting at least one tree parameter of at least a portion of a tree and/or at least one growing condition of at least a portion of a tree, a base station for communication with said UAV (100), means configured for directing said means (105) for holding at least a portion of a tree trunk to a particular position of said tree trunk depending on said at least one detected tree parameter and/or said at least one detected growing condition.