JPH04325397A - Multi-engine airplane - Google Patents

Abstract

PURPOSE:To improve the safety against an engine fire and reduce the noise to a cabin by mounting one engine each at wing root sections of the right and left horizontal tail wings, and mounting one engine at the lower section of a fuselage so that it can be discarded at the time of a fire. CONSTITUTION:One engine 3 is mounted each at wing root sections of the right and left horizontal tail wings 5, two in all, and one engine 3a is mounted via a pylon 4 at the lower section of a fuselage 2 so that it can be discarded at the time of a fire. The engine 3a is used as an option, the engines 3 are normally used, noises hardly reach a passenger compartment, and it is quiet. Even if a fire breaks out on the engines 3, they are sufficiently separated from the passenger compartment, passengers have a sufficient margin for the evacuation time, flames and smoke are discharge backward and hardly enter the passenger compartment. The engine 3a is located on the airframe axis and can be immediately switched for use when a trouble occurs on the engines 3, and it can be discarded when a fire breaks out, thus the safety is improved.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to multi-engine aircraft.

0002

[Prior Art] Conventional engine configurations for multi-engine aircraft include two engines, one each on the left and right sides under the wings 01, as shown in Fig. 2, and two engines in total, one on each side under the wings 01, and the fuselage 03 as shown in Fig. 3.
As shown in Figure 4, one engine 03 is installed on each side of the wing 01, and one engine 03 is installed at the root of the vertical stabilizer 04, for a total of three engines. The equipment is being put into practical use. In each figure, (a) is a view seen from the front, and (b) is a plan view.

0003

[Problems to be Solved by the Invention] The above-mentioned conventional multi-purpose aircraft had the following problems to be solved.

[0004] That is, in the aircraft shown in FIGS. 2 and 3, the distance between the cabin and the engine is short, so there is a problem in that the noise into the cabin is large.

[0005] Furthermore, the aircraft shown in FIG. 4 has a problem of poor maintainability because the engine is mounted at a high position.

Furthermore, in the aircraft shown in FIGS. 2 and 3, the distance between the cabin and the engine is short, so there is a problem that passengers may be delayed in escaping in an emergency (when an engine fire occurs).

Another problem is that conventional aircraft, including the aircraft shown in FIGS. 2, 3, and 4, are not equipped with a system for jettisoning an engine that has caught fire.

[0008]

[Means for Solving the Problems] As a means for solving the above problems, the present invention provides a total of two engines, one mounted on each wing root of the left and right horizontal stabilizers, and one mounted on the lower part of the fuselage so that they can be jettisoned in the event of a fire. The object of the present invention is to provide a multi-engine aircraft characterized by being equipped with a single engine.

[0009]

[Operations] Since the present invention is constructed as described above, it has the following functions.

That is, by mounting the two engines on the wing roots of the horizontal stabilizer that are farthest from the cabin, engine noise into the cabin can be reduced.

[0011] Furthermore, since the distance between the cabin and the engine is long, in the event of an emergency (engine fire, etc.), passengers have more time to escape, and fire, smoke, etc.
It is ejected to the back (into the air) where there is nothing.

[0012] Furthermore, since the engine exhaust is ejected rearward at the rear end, it does not have an adverse aerodynamic effect on the control surface or the like.

Furthermore, fuel can be directly supplied from a fuel tank installed within the horizontal stabilizer.

Furthermore, since one engine is mounted in the lower part of the fuselage, this can be used as an option.

Furthermore, in the event of a fire occurring during flight, one engine mounted in the lower part of the fuselage can be jettisoned, thereby reducing the weight of gas and reducing the burden on the remaining two engines.

[0016]

[Embodiment] An embodiment of the present invention will be explained with reference to FIG. FIG. 1 is a diagram of this embodiment, in which (a) is a front view, (b) is a plan view, and (c) is a left side view.

In the figure, two engines 3, one each, are mounted on the root portions of the left and right horizontal stabilizers 5. Furthermore, one engine 3a is mounted in the lower part of the fuselage 2 via a pylon 4 so that it can be jettisoned in case of a fire or the like.

Since this embodiment is configured as described above, the engine 3a is used as an option.
When the engine 3 is used normally, noise hardly reaches the cabin and the cabin is quiet. Furthermore, even if a fire occurs in the engine 3, there is enough time to evacuate the passengers since it is sufficiently separated from the passenger cabin. In addition, fire and smoke are exhausted to the rear and hardly ever enter the cabin.

Although the engine 3a may be used all the time, it can be used as an option when transporting equipment, etc., and even if trouble occurs, the engine 3a remains on the axis, so it can be immediately switched to use. Additionally, in the event of a fire, it can be thrown away, improving safety.

[0020]

Effects of the Invention Since the present invention is constructed as described above, it has the following effects.

[0021] Since the service engine is located at the rear end, engine noise into the cabin is reduced. Additionally, the negative impact on the cabin due to engine fire is reduced.

[0022] Since the mounting position of the engine is lowered, the maintainability of the engine is improved. The engine under the fuselage can be jettisoned in the event of a fire, correspondingly increasing the safety of human life.

[Brief explanation of drawings]

FIG. 1 is a diagram of a commercial airliner according to an embodiment of the present invention;
(a) is a front view, (b) is a plan view, and (c) is a left side view.

[Figure 2] Diagrams of the first conventional example, (a) is a front view, (b)
is a plan view.

[Figure 3] Diagrams of the second conventional example, (a) is a front view, (b)
is a plan view.

[Figure 4] Diagrams of the third conventional example, (a) is a front view, (b)
is a plan view.

[Explanation of symbols]

1 Wings 2. Torso 3,3a engine 4 Pylon 5 Horizontal stabilizer

Claims (1)

[Claims] [Claim 1] It is characterized by being equipped with a total of two engines, one each mounted on the wing roots of the left and right horizontal stabilizers, and one engine mounted on the lower part of the fuselage so that it can be jettisoned in the event of a fire. A multi-engine aircraft.