# US 2025/0058870 A1 · Hybrid-use rotary-wing aircraft with aligned drivetrain

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- Number: US 2025/0058870 A1
- Document ID: US20250058870A1
- Status: Published application
- Kind: A1
- Application number: 18/728,214
- Filed: 2023-01-13
- Published: 2025-02-20
- Earliest claimed: 2022-01-14
- Assignees: Roze Mobility
- Applicants: Roze Mobility
- Inventors: Grégoire BOURGUIGNON
- Web page: https://patentgrep.com/patent/US20250058870A1

## CPC

- B64C 27/12: Rotor drives
- B64C 27/06: with single rotor
- B64C 27/82: characterised by the provision of an auxiliary rotor or fluid-jet device for counter-balancing lifting rotor torque or changing direction of rotorcraft
- B64D 27/04: of piston type
- B64U 10/17: Helicopters (flying platforms B64U10/13)
- B64U 20/73: Monocoque body
- B64U 50/11: using internal combustion piston engines
- B64U 50/27: with a single motor serving two or more rotors or propellers
- B64C 2001/0072: {from composite materials}
- B64C: AEROPLANES; HELICOPTERS
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64U: UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR

## Abstract

Rotary-wing aircraft, comprising: a drive motor (12) with a motor output shaft (12-3), a transfer gearbox (14) having the motor output shaft (12-3) as an input and having a first output (14-1) and a second output (14-2), a cockpit with associated cockpit electronics, a rotary wing with rotor and blades, a tail and tail rotor (20) with a drive shaft (20-1) for driving the tail rotor, and a skids unit with equipment suited to the intended application, characterized in that the motor shaft (12-3) of the motor (12), the transfer gearbox (14) with its second output (14-2) and the drive shaft (20-1) that drives the tail rotor (20) are aligned.

## Claims

### Claim 1

A rotary wing aircraft, comprising:
a drive motor (12) with a motor output shaft (12-3),
a transfer gearbox (14) having the motor output shaft (12-3) as an input and having a first output (14-1) and a second output (14-2),
a cockpit (22) with cockpit electronics,
a rotary wing (16) with rotor (16-1) and blades (16-2),
a tail (18) and its tail rotor (20) with a drive shaft (20-1) for said tail rotor, and
a skids unit (24) with equipment suited to the intended application,
characterized in that the drive shaft (12-3) of the motor (12), the transfer gearbox (14) with its second output (14-2) and the drive shaft (20-1) of the tail rotor (20) are aligned.

### Claim 2 (depends on 1)

The rotary-wing aircraft according to claim 1, wherein it comprises a structural core (10) and in that said structural core is monolithic.

### Claim 3 (depends on 1)

The rotary-wing aircraft according to claim 1, wherein the structural core (10) is made of carbon-fiber composites.

### Claim 4 (depends on 1)

The rotary-wing aircraft according to claim 1, wherein the structural core (10) comprises lateral housings suitable for receiving the fuel tanks required by the drive motor (12).

### Claim 5 (depends on 1)

The rotary-wing aircraft according to claim 1, characterized in that wherein the skids unit (24) is connected to the structural core (10) by quick-release fasteners.

### Claim 6 (depends on 1)

The rotary-wing aircraft according to claim 1, wherein the tail (18) comprises a connecting flange (18-1) and the structural core (10) comprises an attachment flange (10-5) suited to cooperate with said connecting flange (18-1).

### Claim 7 (depends on 1)

The rotary-wing aircraft according to claim 1, wherein the structural core (10) comprises a cradle (12-1) for receiving the drive motor (12).

### Claim 8 (depends on 1)

The rotary-wing aircraft according to claim 1, wherein the motor output shaft (12-3) of the motor (12), the transfer gearbox (14) with its first output (14-1) to the rotary wing (16) and its other output (14-2) to the tail rotor (20) are in the same plane.

### Claim 9 (depends on 1)

The rotary-wing aircraft according to claim 1, wherein in drone mode, the controls are electric.

### Claim 10 (depends on 1)

The rotary-wing aircraft according to claim 1, wherein in passenger-carrying mode, the controls are manual.