# US 2025/0083805 A1 · Blended falx winglet

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- Number: US 2025/0083805 A1
- Document ID: US20250083805A1
- Status: Published application
- Kind: A1
- Application number: 18/463,625
- Filed: 2023-09-08
- Published: 2025-03-13
- Earliest claimed: 2023-09-08
- Assignees: Textron Aviation Inc.
- Applicants: Textron Aviation Inc.
- Inventors: Bryan C. HINSON; Corey HAGEMEISTER; Kelly LAFLIN; Gonzalo MENDOZA
- Web page: https://patentgrep.com/patent/US20250083805A1

## CPC

- B64C 23/069: {using one or more wing tip airfoil devices, e.g. winglets, splines, wing tip fences or raked wingtips}
- Y02T 50/10: Drag reduction
- B64C: AEROPLANES; HELICOPTERS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

Blended falx winglets are provided which include an initial winglet section adapted to being attached to an aircraft wingtip, and forward and aft sub-winglets extending outwardly and upwardly from the initial winglet section. The forward and aft sub-winglets may have respective curved transition sections with different radii of curvature, e.g., the radius of curvature of the curved transition section of the forward sub-winglet may be greater than the radius of curvature of the curved transition section of the aft sub-winglet.

## Claims

### Claim 1

A blended falx winglet comprising:
an initial winglet section adapted to being attached to an aircraft wingtip; and
forward and aft sub-winglets extending outwardly and upwardly from the initial winglet section.

### Claim 2 (depends on 1)

The blended falx winglet according to claim 1, wherein the forward and aft sub-winglets include respective curved transition sections with different radii of curvature.

### Claim 3 (depends on 2)

The blended falx winglet according to claim 2, wherein the radius of curvature of the curved transition section of the forward sub-winglet is greater than the radius of curvature of the curved transition section of the aft sub-winglet.

### Claim 4 (depends on 3)

The blended falx winglet according to claim 3, wherein the radius of curvature of the transition section of the forward sub-winglet is at least about 1.5 times greater than the radius of curvature of the transition section of the aft sub-winglet.

### Claim 5 (depends on 1)

The blended falx winglet according to claim 1, wherein each of the forward and aft sub-winglets includes a terminal end section extending from the curved transition section.

### Claim 6 (depends on 5)

The blended falx winglet according to claim 5, wherein the terminal end section is planar or curved.

### Claim 7 (depends on 5)

The blended falx winglet according to claim 5, wherein the terminal end section of the aft sub-winglet is positioned inboard relative to the terminal end section of the forward sub-winglet.

### Claim 8 (depends on 7)

An aircraft which comprises the blended falx winglet according to claim 7.

### Claim 9 (depends on 1)

An aircraft which comprises the blended falx winglet according to claim 1.

### Claim 10 (depends on 1)

An aircraft comprising a fuselage and port and starboard wings, wherein each of the port and starboard wings include the blended falx winglet according to claim 1.