A propulsion system includes a motor, the motor disposed at a center portion of the propulsion system, the motor further including a rotor shaft. The system includes a splitter gearbox coupled to the rotor shaft, the splitter gearbox further comprising at least one splitter output shaft. The system includes at least one continuously variable transmission (CVT), the CVT coupled to the splitter output shaft, the CVTs further including a driveshaft. The system includes at least one bevel gearbox, the bevel gearbox comprising a bevel gearbox input shaft and a bevel gearbox output shaft, the bevel gearbox input shaft disposed parallel to the horizontal plane and the bevel gearbox output shaft disposed at an angle to the bevel gearbox input shaft, wherein the bevel gearbox input shaft is coupled to the driveshaft. The system includes at least one propeller coupled to the bevel gearbox output shaft.

A propulsion system includes a motor, the motor disposed at a center portion of the propulsion system, the motor further including a rotor shaft. The system includes a splitter gearbox coupled to the rotor shaft, the splitter gearbox further comprising at least one splitter output shaft. The system includes at least one continuously variable transmission (CVT), the CVT coupled to the splitter output shaft, the CVTs further including a driveshaft. The system includes at least one bevel gearbox, the bevel gearbox comprising a bevel gearbox input shaft and a bevel gearbox output shaft, the bevel gearbox input shaft disposed parallel to the horizontal plane and the bevel gearbox output shaft disposed at an angle to the bevel gearbox input shaft, wherein the bevel gearbox input shaft is coupled to the driveshaft. The system includes at least one propeller coupled to the bevel gearbox output shaft.

Provided is a flight device and a flight device control method that ensure safety even if a defect occurs in a power connection/disconnection unit. Rotor-side power transmission units 26 of a flight device 10 include first and second rotor-side power transmission units 261 and 262. Power connection/disconnection units 27 transmit power according to conditions and include first and second power connection/disconnection units 271 and 272. The first power connection/disconnection unit 271 is provided between a first engine-side power transmission unit 251 and the first rotor-side power transmission unit 261. The second power connection/disconnection unit 272 is provided between a second engine-side power transmission unit 252 and the second rotor-side power transmission unit 262. The arithmetic control unit 31 changes the flight status when the degree to which the first power connection/disconnection unit 271 transmits the power and the degree to which the second power connection/disconnection unit 272 transmits the power differ by a certain amount or more.

Provided is a flight device and a flight device control method that ensure safety even if a defect occurs in a power connection/disconnection unit. Rotor-side power transmission units 26 of a flight device 10 include first and second rotor-side power transmission units 261 and 262. Power connection/disconnection units 27 transmit power according to conditions and include first and second power connection/disconnection units 271 and 272. The first power connection/disconnection unit 271 is provided between a first engine-side power transmission unit 251 and the first rotor-side power transmission unit 261. The second power connection/disconnection unit 272 is provided between a second engine-side power transmission unit 252 and the second rotor-side power transmission unit 262. The arithmetic control unit 31 changes the flight status when the degree to which the first power connection/disconnection unit 271 transmits the power and the degree to which the second power connection/disconnection unit 272 transmits the power differ by a certain amount or more.

A transmission device for an unmanned aerial vehicle (UAV), wherein arms driving propellers are positionable to not interfere with an air cleaner and a radiator. A transmission device for a UAV in which arms are positioned on a machine body upper section and propellers are driven using a straight-four engine, the transmission device including a drive gear that is attached to a crankshaft; a clutch shaft drive gear that meshes with the drive gear; a bevel gear that drives a drive shaft; a drive shaft base gear that is driven by the bevel gear; a top section gear train that includes a drive shaft main gear, a left sub-gear meshing with the main gear, a reverse gear meshing with the main gear, and a right sub-gear meshing with the reverse gear; first and second bevel gears that mesh with the left sub-gear and drive the first and second arms.

A transmission device for an unmanned aerial vehicle (UAV), wherein arms driving propellers are positionable to not interfere with an air cleaner and a radiator. A transmission device for a UAV in which arms are positioned on a machine body upper section and propellers are driven using a straight-four engine, the transmission device including a drive gear that is attached to a crankshaft; a clutch shaft drive gear that meshes with the drive gear; a bevel gear that drives a drive shaft; a drive shaft base gear that is driven by the bevel gear; a top section gear train that includes a drive shaft main gear, a left sub-gear meshing with the main gear, a reverse gear meshing with the main gear, and a right sub-gear meshing with the reverse gear; first and second bevel gears that mesh with the left sub-gear and drive the first and second arms.

An aerial vehicle connected to or integrated with a work device, including a power source to generate power, a rotor to generate lift used for flight by rotating a propeller, and a power transmission to transmit driving power to the work device.

An aerial vehicle connected to or integrated with a work device, including a power source to generate power, a rotor to generate lift used for flight by rotating a propeller, and a power transmission to transmit driving power to the work device.

A hybrid system for drones and other modes of transport. A combustion engine provides range and/or lifting capacity for drones while electric motors/generators provide both control and maneuverability. One or more combustion engines, in conjunction with one or more electric motors/generators form a propulsion system whereby each is connected to and drives its own driving pinion in one or more planetary gear sets, and provide continuously variable transmission for driving propellers or driveshafts. The combustion engine may be connected directly to one of the planetary gear's driving pinions, or can drive one of the planetary gear's driving pinions. If the propellers are only driven by either a combustion engine, or an electric motor/generator, the other engine/motor will be kept at rest by a braking device for a combustion engine or a braking device for an electric motor/generator.

A hybrid system for drones and other modes of transport. A combustion engine provides range and/or lifting capacity for drones while electric motors/generators provide both control and maneuverability. One or more combustion engines, in conjunction with one or more electric motors/generators form a propulsion system whereby each is connected to and drives its own driving pinion in one or more planetary gear sets, and provide continuously variable transmission for driving propellers or driveshafts. The combustion engine may be connected directly to one of the planetary gear's driving pinions, or can drive one of the planetary gear's driving pinions. If the propellers are only driven by either a combustion engine, or an electric motor/generator, the other engine/motor will be kept at rest by a braking device for a combustion engine or a braking device for an electric motor/generator.