KR20010035451A - A rudder structure in a micro-light fixed pitch coaxial helicopter - Google Patents

Abstract

PURPOSE: A rudder of a fixed-pitch inversed rotor type small-sized helicopter is provided to effectively turn the direction of the nose of the helicopter by using both down wash and head wind by inclining and simultaneously rotating the surfaces of vertical tail wings by connecting the surfaces to supports with hinges. CONSTITUTION: In a rudder(01) for a fixed-pitch inversed rotor type small-sized helicopter, the surfaces of vertical tail wings as the rudder are inclined right and left in the operation direction and simultaneously the surfaces rotate right and left so that the direction of a nose of the helicopter is effectively turned in case of hovering and flying back and forth, wherein the vertical tail wings are connected to supports(24) by hinges(23) attached in two diagonal lines to be mounted to a belly of the helicopter.

Description

A rudder structure in a micro-light fixed pitch coaxial helicopter

The present invention is a device for changing the direction of the nose during hoovering or forward and backward movement in a small helicopter of the inverted rotor type with a fixed pitch, up to now has the form of a vertical wing like a rudder of a fixed-wing aircraft. This vertical wing is a cable connected to a pedal operated by the pilot, and when the pilot presses the pedal according to the direction of the nose, the vertical wing is inclined to the left and right, and the tail is received by the downflow generated from the rotor blades. If the tail moves to the right around the main rotor axis, the nose moves to the left and the nose moves to the right if the tail moves to the left.

The present invention adopts a method of tilting the surface of the conventional tail vertical blades left and right as described above, while receiving the downflow (down wash) of the main rotor to change the nose direction during hoovering, The left and right movements are effective, but the purpose is to solve the problem of not having a direct effect on the turning of the nose by the vertical tail wing as in the fixed wing aircraft in the forward or backward flight.

When flying forward or backward, when the rudder, which is a vertical tail wing, is viewed about the vertical axis, turning the wing surface to the left or right will change the nose's direction as if it were a fixed wing. It becomes difficult to turn the nose during ringing. In order to solve this problem, if additional vertical tail wings are installed according to their functions, they are mechanically complicated, weight of the aircraft increases, and pedal operation becomes difficult. Another purpose is to allow the nose to turn effectively during flight.

1 is an overall rotor helicopter of the reverse rotor type is equipped with a rudder

Indicate location.

2 shows that the rudder moves from side to side by a cable connected to a pedal

Showing the structure enabled

3 shows that the rudder is connected to the pilot's pedal.

4 shows a posture in which the rudder moves.

5 shows the rudder for a downflow (downwash) descending in the vertical direction.

The side is tilted from side to side to show the role it receives.

6 shows the rudder against wind (head wind) coming from the front;

It shows the role that the surface receives left and right.

7 shows a hinge attached to the rudder;

<Explanation of symbols for main parts of drawing>

01: Rudder 02: Boom

04: rotor 08: rotor head

11: When the surface of the rudder is inclined or rotated to the position 12 or 15

Rotational direction of the tail

12: Right tilt of the rudder face 13: Left tilt of the rudder face

14: left turn of the rudder face 15: right turn of the rudder face

21: installation hinge of the rudder 22: support pin

23 hinge of cable bar 24 rudder support

25 push-pull bar 26 cable bar

31: Pedal 32: Cable

42: direction of down wind (down wash) 43: direction of nose (front) side

In order to achieve the above object, a feature of the present invention is that the surface of the rudder is inclined from side to side, while the surface of the rudder rotates from side to side at the same time. To this end, as shown in FIG. 3, the present invention provides a pedal 31 for pilot operation, a cable 32 for transmitting a pedal movement, and a cable bar 26 moving back and forth around the hinge 23 when the cable is pulled. The operation of the pedal 31 is transmitted to the rudder by the push-pull bar 25 which transmits the movement of the cable bar 26 to the rudder 01. Also, as shown in FIG. 2, the rudder 01 of the vertical tail wing is attached to the tail fuselage of the helicopter by two supports 24. The vertical wing rudder 01 of the tail shown in FIG. 1 rotates about the hinges 21 at both ends of the support 24 shown in FIG. The two supports 24 allow the face of the rudder to rotate left and right about the hinge 21 in FIG. 7, and as shown in FIG. 7, the two hinges 21 satisfy both the horizontal and vertical axis rotations. In order to be able to, the front hinge is characterized in that the lower side in the diagonal direction compared to the rear hinge.

When the pilot presses the pedal 31 with his foot, the rudder, which is a vertical tail, is rotated by the connected cable 32, the cable bar 26 and the push-pull bar 25. The two support hinges 21 Since it is located in the lower side of the diagonal direction, as shown in the center of the horizontal axis, as shown in Figure 4, it is inclined to the left and right, and at the same time, the surface of the rudder rotates on the vertical axis. Therefore, as shown in FIG. 5, the rudder at the time of hoovering due to the effect on the wing surface of the rudder 01 in which the downflow (down wash) 42 generated in the rotor 04 is inclined from side to side (12, 13). Is in the 12 position, the tail is rotated in the direction of 11, as shown in Figure 6 if the rudder (01) plane of the vertical wing is turned to the 15 position in the wind (43) coming from the front The tail of the fuselage rotates in the direction of eleven. Accordingly, the direction of the tail fuselage in the forward and backward flight is rotated by the left and right rotation of the rudder.

As described above, according to the present invention, when the rudder surface of the existing vertical tail wing is connected to the support by the hinges attached in two diagonal directions, the rotor is lowered by tilting the wing surface to the left and right and rotating at the same time. Efficient use of wind (head wind) from the front or rear of downflow or forward and backward movements in both cases can facilitate the turning of the nose.

In addition, the existing pedal and the vertical tail wing can be utilized as it is by changing the attachment position of the support and the hinge without any additional device, thereby increasing the weight of the helicopter or obtaining a nose changeover effect without complicated mechanical structure.

Claims (2)

Fixed pitch reversing rotor In small helicopters, the vertical tail wing is tilted to the left or right, while the wing surface is rotated to the left or right to effectively change the direction of the nose during hoover or forward and backward flight. To turn the tail wing. The vertical turning wing of claim 1, wherein the vertical tail wing is installed in the fuselage of an airplane using a hinge attached to two sides of the tail wing in two diagonal directions.