A propeller includes a blade free to rotate. A first stop is positioned to mechanically engage one or both of a first portion of the blade and a first structure coupled to the blade when the blade is in a first position at a first end of the rotational range of motion. A second stop is positioned to mechanically engage one or both of a second portion of the blade and a second structure coupled to the blade when the blade is in a second position at a second end of the defined rotational range. The blade rotates to the first position against the first stop when the propeller is rotated in a first direction and to the second position against the second stop when the propeller is rotated in a second direction.

Systems and methods for a weapon mountable tactical heads-up display (HUD) are provided. The HUD may include a 9 degrees of freedom (9DOF) sensor, a target library, and a target finder visualization. The target library may store respective ballistic information for each target of a plurality of targets. The respective ballistic information may include a target vector for each target of the plurality of targets. The target vector may be calculated based on data received from the 9DOF sensor. The target finder visualization may allow a shooter to locate a selected target of the plurality of targets. The target finder visualization may be based on the target vector.

An electronic vertical takeoff and landing (eVTOL) multicopter which includes a communications interface configured to establish a communication channel between a site local server and the eVTOL multicopter and send a vehicle identifier and vehicle state information from the eVTOL multicopter to the site local server. The eVTOL multicopter also includes a processor configured to perform a management operation received from the site local server, wherein the site local server is configured to determine the management operation based at least in part on the vehicle identifier and the vehicle state information.

An electronic vertical takeoff and landing (eVTOL) multicopter which includes a communications interface configured to establish a communication channel between a site local server and the eVTOL multicopter and send a vehicle identifier and vehicle state information from the eVTOL multicopter to the site local server. The eVTOL multicopter also includes a processor configured to perform a management operation received from the site local server, wherein the site local server is configured to determine the management operation based at least in part on the vehicle identifier and the vehicle state information.

A combination unmanned aerial vehicle (UAV) having a fixed wing UAV, a plurality of rotor UAVs, a first communication component and a plurality of second communication components. The first communication component is arranged on the fixed wing UAV, and the plurality of second communication components are correspondingly arranged on the plurality of rotor UAVs. The first communication component can communicate with the plurality of second communication components. When operating in long-distance and complex surrounding areas, it can fly to a designated position through the fixed wing UAV, and then release the plurality of rotor UAVs, which may carry out reconnaissance operations on one or more targets in one area at the same time, or operate on multiple targets in multiple areas, and transmit signal commands in real time through the first communication component and the second communication component.

A combination unmanned aerial vehicle (UAV) having a fixed wing UAV, a plurality of rotor UAVs, a first communication component and a plurality of second communication components. The first communication component is arranged on the fixed wing UAV, and the plurality of second communication components are correspondingly arranged on the plurality of rotor UAVs. The first communication component can communicate with the plurality of second communication components. When operating in long-distance and complex surrounding areas, it can fly to a designated position through the fixed wing UAV, and then release the plurality of rotor UAVs, which may carry out reconnaissance operations on one or more targets in one area at the same time, or operate on multiple targets in multiple areas, and transmit signal commands in real time through the first communication component and the second communication component.

Vertical take-off, landing and horizontal straight flight of an aircraft includes activation a plurality of front and rear lifting propellers, each of which is connected to a respective independently operating electric motor. In addition, horizontal straight flight of the aircraft includes activation of additional left and right pushing propellers, each of which is connected to an independently operating electric motor. The front and rear lifting propellers are respectively positioned generally horizontally and symmetrically opposite to one another and equidistantly relative to a longitudinal axis of the aircraft. The right pushing propeller and the left pushing propeller are positioned generally vertically and symmetrically opposite to one another and equidistantly relative to the longitudinal axis of the aircraft.

Vertical take-off, landing and horizontal straight flight of an aircraft includes activation a plurality of front and rear lifting propellers, each of which is connected to a respective independently operating electric motor. In addition, horizontal straight flight of the aircraft includes activation of additional left and right pushing propellers, each of which is connected to an independently operating electric motor. The front and rear lifting propellers are respectively positioned generally horizontally and symmetrically opposite to one another and equidistantly relative to a longitudinal axis of the aircraft. The right pushing propeller and the left pushing propeller are positioned generally vertically and symmetrically opposite to one another and equidistantly relative to the longitudinal axis of the aircraft.

A multirotor aerial vehicle (MAV) is disclosed. The MAV includes a housing, a plurality of rotatable arms, wherein each of the plurality of rotatable arms has a proximal end coupled to the housing and a distal end configured to rotate about a vertical axis passing through the proximal end of the corresponding arm, a plurality of thrust-generating rotors, each coupled to a corresponding one of the plurality of rotatable arms at the corresponding distal end, a flight controller configured to selectively control each of the plurality of thrust-generating rotors, and a flight trim controller configured to control rotation of the plurality of rotatable arms in order to adjust the geometric center of the rotors of the MAV from a first center of gravity (CoG) associated with the MAV in an unloaded state to a second CoG associated with the MAV in a loaded state.

A multirotor aerial vehicle (MAV) is disclosed. The MAV includes a housing, a plurality of rotatable arms, wherein each of the plurality of rotatable arms has a proximal end coupled to the housing and a distal end configured to rotate about a vertical axis passing through the proximal end of the corresponding arm, a plurality of thrust-generating rotors, each coupled to a corresponding one of the plurality of rotatable arms at the corresponding distal end, a flight controller configured to selectively control each of the plurality of thrust-generating rotors, and a flight trim controller configured to control rotation of the plurality of rotatable arms in order to adjust the geometric center of the rotors of the MAV from a first center of gravity (CoG) associated with the MAV in an unloaded state to a second CoG associated with the MAV in a loaded state.