# US 8,783,618 B2 · Weathertight fitting for aircraft tail vertical stabiliser mounting

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- Number: US 8,783,618 B2
- Document ID: US8783618B2
- Status: Granted
- Kind: B2
- Application number: 13/136,013
- Filed: 2011-07-20
- Published: 2012-04-19
- Granted: 2014-07-22
- Earliest claimed: 2010-10-19
- Assignees: Airbus Operations S.L.
- Applicants: Enrique Vera Villares; Elena Arévalo Rödríguez; José Maria Pina López; Javier Cabeza Huertas; Diego Folch Cortés
- Inventors: Enrique Vera Villares; Elena Arévalo Rödríguez; José Maria Pina López; Javier Cabeza Huertas; Diego Folch Cortés
- Web page: https://patentgrep.com/patent/US8783618B2

## CPC

- B64C 1/26: Attaching the wing or tail units or stabilising surfaces
- Y10T 29/49826: Assembling or joining
- B64C: AEROPLANES; HELICOPTERS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Weathertight fitting (41) for the mounting of the tail vertical stabilizer of an aircraft in a rear area of its fuselage, the construction being based on a casing (5) made with a composite material as one unitary piece and some frames (7) that are comprised of: one first piece (43) comprised of two bodies (45, 45′), that include the mounting lugs (47, 47′) for the tail vertical stabilizer and some vertical walls (49, 49′) for joining the fitting (43) to the frames (7) of the fuselage, and a weathertight central profile (51); two pairs of additional pieces (55, 55′; 65, 65′) of angular shape, that include some horizontal walls (57, 57′; 67, 67′) for joining to the casing (5) and some vertical walls (59, 59′; 69, 69′) for joining to the aforementioned bodies (45, 45′). All the weathertight fitting's (41) pieces are made with a composite material.

## Claims

### Claim 1

A weathertight fitting (41) for mounting a tail vertical stabiliser in the rear fuselage area of an aircraft that is built using composite casing (5) material and that is comprised of a unitary section and frames (7) that are made with a composite material, characterised as comprising:
a) a first piece (43) made with a composite material and comprised of at least two bodies (45, 45′) and a central profile (51) for joining the at least two bodies (45, 45′) together, each of the two bodies (45, 45′) including a mounting lug (47, 47′) for mounting the tail vertical stabiliser to the fuselage and a vertical wall (49, 49′) for joining the first part (43) to the frames (7) of the fuselage;
b) a first pair of pieces (55, 55′) of angular shape made with a composite material and having a horizontal wall (57, 57′) and a vertical wall (59, 59′), each of the pieces (55, 55′) of the first pair being joined to one of the two bodies (45, 45′) of the first piece (43) and the horizontal wall (57, 57′) of each of the pieces (55, 55′) being structured to be positioned relative to the casing (5); and
c) a second pair of pieces (65, 65′) of angular shape made with a composite material and having a horizontal wall (67, 67′) and a vertical wall (69, 69′), each of the pieces (65, 65′) of the second pair being joined to one of the two bodies (45, 45′) of the first piece (43) and the horizontal wall (67, 67′) of each of the pieces (65, 65′) being structured to be positioned relative to the casing (5).

### Claim 2 (depends on 1)

The weathertight fitting (41) of claim 1, wherein the mounting lug (47, 47′) of each of the two bodies (45, 45′) of the first piece (43) and the vertical wall (69, 69′) of each of the pieces (65, 65′) of the second pair have a drilled hole (48, 48′) designed to be aligned for receiving a bolt for joining the tail vertical stabiliser to the aircraft.

### Claim 3 (depends on 2)

The weathertight fitting (41) of claim 2, wherein the central profile (51) of the first piece (43) is aligned with the horizontal wall (57, 57′) of each of the first pair of pieces (55, 55′).

### Claim 4 (depends on 3)

The weathertight fitting (41) of claim 3, wherein the composite material of the first piece (43), the first pair of pieces (55, 55), and the second pair of pieces (65, 65′) comprises carbon fibre reinforced plastic material.

### Claim 5 (depends on 4)

A process for mounting the weathertight fitting (41) of claim 4, to the fuselage of the aircraft, comprising:
a) mounting the first piece (43) to an interior part of the casing (5);
b) mounting each of the pieces (55, 55′) of the first pair by joining the horizontal wall (57, 57′) to the casing (5) by means of a mechanical joint and joining the vertical wall (59, 59′) to one of the two bodies (45, 45′) of the first piece (43) by means of a mechanical joint; and
c) mounting each of the pieces (65, 65′) of the second pair by joining the horizontal wall (67, 67′) to the casing (5) by means of a mechanical joint and joining the vertical wall (69, 69′) to one of the two bodies (45, 45′) of the first piece (43) by means of a chemical bond.

### Claim 6 (depends on 4)

A process for mounting the weathertight fitting (41) of claim 4, to the fuselage of the aircraft, comprising:
a) mounting the first piece (43) to an interior part of the casing (5);
b) mounting each of the pieces (55, 55′) of the first pair by joining the horizontal wall (57, 57′) to the casing (5) by means of a mechanical joint and joining the vertical wall (59, 59′) to one of the two bodies (45, 45′) of the first piece (43) by means of a chemical bond; and
c) mounting each of the pieces (65, 65′) of the second pair by joining the horizontal wall (67, 67′) to the casing (5) by means of a mechanical joint and joining the vertical wall (69, 69′) to one of the two bodies (45, 45′) of the first piece (43) by installing bushings (71, 71′) in the drilled holes (48, 48′) of lugs (47, 47′) used for receiving a bolt joining the vertical stabiliser to the first piece (43).