A helicopter has a main rotor with propeller blades which is driven by a rotor shaft and which is hinge-mounted to this rotor shaft. The angle between the surface of rotation of the main rotor and the rotor shaft may vary. A swinging manner on an oscillatory shaft is essentially transverse to the r
A helicopter has a main rotor with propeller blades which is driven by a rotor shaft and which is hinge-mounted to this rotor shaft. The angle between the surface of rotation of the main rotor and the rotor shaft may vary. A swinging manner on an oscillatory shaft is essentially transverse to the rotor shaft of the main rotor and is directed transversely to the longitudinal axis of the vanes. The main rotor and the auxiliary rotor are connected to each other by a mechanical link. The swinging motions of the auxiliary rotor controls the angle of incidence (A) of at least one of the propeller blades of the main rotor. There are wings from the body and a stabilizer at the tail.
대표청구항▼
What is claimed is: 1. A remote control toy helicopter comprising a body with a tail; a motor and a battery for the motor, the motor being controllable by a controller remote from the helicopter body; a main rotor with at least two propeller blades, wherein the propeller blades define a plane of ro
What is claimed is: 1. A remote control toy helicopter comprising a body with a tail; a motor and a battery for the motor, the motor being controllable by a controller remote from the helicopter body; a main rotor with at least two propeller blades, wherein the propeller blades define a plane of rotation of the main rotor, wherein the main rotor is driven by a rotor shaft, on which the propeller blades are mounted; a tail rotor driven by a second rotor shaft directed transversly to the rotor shaft of the main rotor; an auxiliary rotor driven by the rotor shaft of the main rotor in the rotational sense of the main rotor, the auxiliary rotor being mounted such that a first longitudinal axis of the auxiliary rotor, in the sense of rotation, is situated in an acute angle relative to a second longitudinal axis of one of the propeller blades of the main rotor, the auxiliary rotor having a further plane of rotation being spaced from the plane of rotation, the auxiliary rotor being mounted in a swinging relationship on an oscillatory shaft provided essentially transversely to the rotor shaft of the main rotor and the swinging motion being relatively upwards and downwards around the oscillatory shaft, such that the swinging motion of the auxiliary rotor controls an angle of incidence of the propeller blades of the main rotor, each of the propeller blades having a substantially convex upper surface along the second longitudinal axis, the upper surface being convex from a leading edge to a trailing edge of the blade, wherein each propeller blade has a substantially concave lower surface along the second longitudinal axis and the lower surface being concave from the leading edge to the trailing edge of the blade throughout a substantial portion of the second longitudinal axis of the blade, wherein the propeller blades of the main rotor are essentially in line with each other, wherein the concave lower surface of each of the blades is complementary in shape to the convex upper surface of each of the propeller blades, wherein the propeller blades of the main rotor are mounted pivotably on a joint formed by a spindle which is fixed on the rotor shaft of the main rotor, and the spindle is substantially parallel to the longitudinal axis, wherein the main rotor is a unitary body, and wherein the propeller blades are essentially rigidly connected with each other and wherein each propeller blade has an upper surface formed in the form of an upwardly convex curve running from a free end of the propeller blade toward the rotor shaft. 2. A toy helicopter according to claim 1, wherein the first longitudinal axis of the auxiliary rotor runs along a line of the auxiliary rotor which runs through the rotor shaft, and wherein the second longitudinal axis extends from the ends of the propeller blades towards the rotor shaft. 3. A toy helicopter according to claim 1 wherein there is a single plane of rotation of the main rotor defined by the plane of rotation of the second longitudinal axis running through the spindle. 4. A toy helicopter according to claim 1 wherein the auxiliary rotor has two rotor elements, preferably vanes each having a convex curved upper surface from a leading edge to a trailing edge thereof and a concave lower surface complementary in shape to the upper surface, extending essentially in accordance with the first longitudinal axis. 5. A toy helicopter according to claim 1 wherein the first longitudinal axis of the rotor elements, preferably of the vanes, is in the sense of rotation in front of the second longitudinal axis of the propeller blades. 6. A toy helicopter according to claim 1 wherein the auxiliary rotor is a rigid whole mounted pivotably around the oscillatory shaft. 7. A toy helicopter according to claim 5 wherein the rotor elements, preferably the vanes, of the auxiliary rotor extend essentially straight along the first longitudinal axis rigidly connected with each other. 8. A toy helicopter according to claim 1 wherein the rotor shaft extends through an aperture in the main rotor. 9. A toy helicopter according to claim 1 wherein the plane of rotation of the auxiliary rotor is above the plane of rotation of the main rotor. 10. A toy helicopter according to claim 1 wherein the first longitudinal axis of the rotor elements, preferably of the vanes, of the auxiliary rotor in the sense of rotation, is located within an angle of 5 to 25 degrees, preferably approximately 10 degrees, with the second longitudinal axis of one of the propeller blades of the main rotor. 11. A remote control toy helicopter comprising a body with a tail; a motor and a battery for the motor, the motor being controllable by a controller remote from the helicopter body; a main rotor with at least two propeller blades, wherein the propeller blades define a single plane of rotation of the main rotor, wherein the main rotor is driven by a rotor shaft, on which the propeller blades are mounted for rotation only in the single plane with respect to the rotor shaft; a tail rotor driven by a second rotor shaft directed transversly to the rotor shaft of the main rotor; an auxiliary rotor driven by the rotor shaft of the main rotor in the rotational sense of the main rotor, the auxiliary rotor being mounted such that a first longitudinal axis of the auxiliary rotor, in the sense of rotation, is situated in an acute angle relative to a second longitudinal axis of one of the propeller blades of the main rotor, the auxiliary rotor having a further plane of rotation being spaced from the plane of rotation, the auxiliary rotor being mounted in a swinging relationship on an oscillatory shaft provided essentially transversely to the rotor shaft of the main rotor and the swinging motion being relatively upwards and downwards around the oscillatory shaft, such that the swinging motion of the auxiliary rotor controls an angle of incidence of the propeller blades of the main rotor, each of the propeller blades having a substantially convex upper surface along the second longitudinal axis, the upper surface being convex from a leading edge to a trailing edge of the blade, wherein each propeller blade has a substantially concave lower surface along the second longitudinal axis and the lower surface being concave from the leading edge to the trailing edge of the blade throughout a substantial portion of the second longitudinal axis of the blade, wherein the concave lower surface of each of the blades is complementary in shape to the convex upper surface of the propeller blade, wherein each propeller blade has an upper surface formed in the form of an upwardly convex curve running from a free end of the propeller blade toward the rotor shaft. 12. A toy helicopter according to claim 11 wherein the auxiliary rotor has two rotor elements, preferably vanes each having a convex curved upper surface from a leading edge to a trailing edge thereof and a concave lower surface complementary in shape to the upper surface, extending essentially in accordance with the first longitudinal axis.
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이 특허에 인용된 특허 (87)
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