Propulsion system for model airplane
First Claim
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1. A flying model airplane comprising:
- a fuselage having a first wing and a second wing attached to and extending from opposite sides of the fuselage;
a first propulsion unit, having a first motor and a first propeller rotated by the first motor, mounted at the back of the first wing;
a second propulsion unit, having a second motor and a second propeller rotated by the second motor, mounted at the back of the second wing;
a tail, comprising an elevator, connected to the fuselage; and
wherein the axis of rotation of each of the first and second propellers is angled in a fixed downward direction, and the distance between the first and second propellers and the tail is sufficiently short that the air flow from the propellers to the elevator will generate some downward force on the tail.
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Abstract
An improved structure and method for powering the flight of a model airplane by positioning the motors and propellers on the back side of the top wings of an airplane using a single or double-deck wing design so that the propellers and motors of the airplane are better protected from damage in the event of a crash. The fuselage of the airplane is formed of a deformable material such as a foam to aid in crash resistance.
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Citations
32 Claims
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1. A flying model airplane comprising:
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a fuselage having a first wing and a second wing attached to and extending from opposite sides of the fuselage; a first propulsion unit, having a first motor and a first propeller rotated by the first motor, mounted at the back of the first wing; a second propulsion unit, having a second motor and a second propeller rotated by the second motor, mounted at the back of the second wing; a tail, comprising an elevator, connected to the fuselage; and wherein the axis of rotation of each of the first and second propellers is angled in a fixed downward direction, and the distance between the first and second propellers and the tail is sufficiently short that the air flow from the propellers to the elevator will generate some downward force on the tail. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A flying model airplane comprising:
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a fuselage having a first wing and a second wing attached to and extending from opposite sides of the fuselage; a first propulsion unit, having a first motor and a first propeller rotated by the first motor, mounted at the back of the first wing; a second propulsion unit, having a second motor and a second propeller rotated by the second motor, mounted at the back of the second wing; wherein the fuselage is formed of a deformable material; wherein the axis of rotation of each of the first and second propellers is angled in a downward direction; and wherein the bottom of the fuselage provides a landing surface without wheels. - View Dependent Claims (26)
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27. A flying model airplane comprising:
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a fuselage having a first wing and a second wing, for providing the main wing of the airplane, attached to and extending from opposite sides of the fuselage; a first propulsion unit, having a first motor and a first propeller rotated by the first motor, mounted at the back of the first wing; a second propulsion unit, having a second motor and a second propeller rotated by the second motor, mounted at the back of the second wing; a processor, coupled to accept inputs from a radio receiver, electrically coupled to control the first and second motors in response to control signals for directing the airplane'"'"'s flight received by the radio receiver; wherein the axis of rotation of each of the first and second propellers is angled in a fixed downward direction; wherein the processor is operable to control a rotational speed difference between the first and second propellers to assist the airplane in making a turn; and wherein the airplane is operable to be controlled in upwards and downwards flight without the use of elevator control. - View Dependent Claims (28, 29, 30, 31, 32)
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Specification