JPH04221295A - Pylon device for aircraft - Google Patents

Abstract

PURPOSE:To solve a problem related to the conventional fixed type pylon device where a positional relationship between an airframe and an on-board article suspended from the pylon device is fixed, and the flatter characteristic and performance of an aircraft are restricted by the pylon device. CONSTITUTION:A suspension section 1b for carrying an on-board article (store) 3 is made movable fore and aft, relative to a bonded section 1a fixed to an airframe.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pylon device mounted on an aircraft.

0002

[Prior Art] A conventional aircraft pylon device 1 is shown in FIG.
As shown in FIG.
It consists of a fixed structure for loading payloads (stores) 3 such as fuel tanks and weapons onto the aircraft. Note that 5 in the figure is a mounting portion for mounting the load 3 on the pylon device.

0003

[Problems to be Solved by the Invention] As mentioned above, conventional aircraft pylon devices have a fixed structure, so once the attachment location between the main wing and the pylon device is determined, the attachment location of the payload is fixed. As a result, the positional relationship between the main wing and the payload is fixed, and the center of gravity of the aircraft is determined.

[0004] Therefore, there is a problem in that the conventional fixed pylon device restricts the flutter characteristics of the aircraft, which is affected by the positional relationship between the main wing and the payload, and the performance of the aircraft, which is affected by the position of the center of gravity.

The present invention aims to provide an aircraft pylon device that can solve the above problems.

[0006]

[Means for Solving the Problems] The present invention provides a pylon device for an aircraft having a connecting portion fixed to the fuselage and a suspension portion for mounting a payload, in which the suspension portion is movable in the longitudinal direction.

[0007]

[Operation] In the present invention, by moving the suspension part of the pylon device on which the payload is mounted in the longitudinal direction, it is possible to change the positional relationship between the aircraft body and the payload and the position of the center of gravity of the aircraft.

Therefore, for example, during a takeoff run, it is possible to reduce the takeoff run distance by moving the payload to the rear together with the suspension section and moving the center of gravity to the rear.On the other hand, during flight, the payload is moved backwards along with the suspension section. Good flutter characteristics are ensured by controlling the positional relationship between the store and the main wing by moving the main wing forward.

[0009]

Embodiment A first embodiment of the present invention will be explained with reference to FIGS. 1 and 2. In the figure, 1a and 1b are the fixed part and suspended part of the pylon device, 2 is the main wing, and 3 is the storage for fuel tanks, weapons, etc. mounted on the suspended part 1b, and the main wing 2 and fixed part 1a are the attached parts. The store 3 and the suspension part 1b are fixed by a mounting part 5. Inside the fixed part 1a, there are gears 6a, 6 arranged horizontally one after the other perpendicular to the machine axis direction.
b is installed. The hanging portion 1b is a fixed portion 1a.
It is inserted into an elongated hole 1c in the machine axis direction provided at the bottom of the machine, and is supported by rollers 8 in the machine axis direction so as to be movable in the machine axis direction relative to the fixed part 1a as shown by the arrow in FIG. A rack 9 provided in the machine axis direction at the upper end of the lower part 1b meshes with the gears 6a and 6b. Further, the gear 6a is driven by a motor 7 disposed within the fixed portion 1a.

In this embodiment, the fixed part 1a of the pylon device
When the motor 7 inside rotates, the gear 6a is rotated, and this is transmitted to the rack 9 at the upper end of the hanging part 1b, so that the hanging part 1b moves in the front-rear direction, thereby changing the position of the store 3. becomes possible.

As described above, in this embodiment, by moving the store 3 in the front and back direction together with the suspension part 1b,
The relative position between the store 3 and the main wing 2 can be changed, and the center of gravity position of the aircraft can also be changed. As a result, for example, during a takeoff run, the store 3 can be moved rearward to reduce the takeoff roll distance, while during flight, the store 3 can be moved forward to control the positional relationship between the store 3 and the main wing 2, thereby improving the takeoff roll distance. It is possible to ensure good flutter characteristics.

A second embodiment of the present invention will be explained with reference to FIG. The pylon device includes a fixed part 1a fixed to the main wing 2 with a mounting part 4 and a suspended part 1 which fixes the store 3 with a fixed part 5.
The hanging part 1b is inserted into an elongated hole 1c provided in the lower part of the fixed part 1a in the machine axis direction, and the hanging part 1b can be moved in the machine axis direction with respect to the fixed part. The inside of the fixed part 1a is divided into front and rear fluid-tight tank parts 11a, 11b by the upper end 1d of the suspension part 1b, and valves 10a, 10a, 10a, 10a, 10a, 10a, 10a, 10a, 10a, 10a, 10a, 10a, 10a, 10a, 11b, 10a, 11b are provided in the upper part of each tank part 11A, 11B, respectively. 10b is provided, and the same valves 10a, 10
b is connected to a source of fluid such as compressed gas or fuel.

In this embodiment, fluid is supplied (injected) to the tank section 11a inside the fixed section 1a through the front valve 10a,
Tank part 11b inside fixed part 1a via rear valve 10b
By discharging the fluid from the tank parts 11a, 11
The suspension part 1b of the pylon device moves rearward together with the store 3 due to the difference in the fluid pressure of b. Moreover, by performing the above operation in reverse, the hanging portion 1b of the pylon device moves forward together with the store 3. This makes it possible to change the location of the store 3, making it possible to improve flutter characteristics and performance as in the first embodiment.

[0014] In the above embodiments, the pylon device is provided on the main wing, but in the present invention, the pylon device may be provided at a position on the fuselage other than the main wing.

[0015]

Effects of the Invention The present invention has the above-described configuration, and since the pylon device can be moved to any position in the longitudinal direction, the flutter characteristics of the aircraft can be ensured, and furthermore, the pylon device By moving the aircraft in the longitudinal direction, it is possible to move the center of gravity of the aircraft, thereby improving the performance of the aircraft.

[Brief explanation of the drawing]

FIG. 1 is a partially longitudinally sectional front view of a first embodiment of the present invention.

FIG. 2 is a longitudinal side view of the same embodiment.

FIG. 3 is a front sectional view of a second embodiment of the invention.

FIG. 4 is a front view of a conventional pylon device.

FIG. 5 is a side view of a conventional pylon device.

[Explanation of symbols]

1a Fixed part 1 of pylon device
b Suspension part 2 of pylon device
Main wing 3 Store 4, 5
Mounting parts 6a, 6b Gear 7 Motor 8
roller 9
Rack 10a, 10b Valve 11a, 11b Tank

Claims (1)

[Claims] 1. An aircraft pylon device having a connecting portion fixed to the fuselage and a suspended portion for mounting a payload, wherein the suspended portion is movable in the longitudinal direction.