# What Do You Know About Flight Dynamics?

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In the science of flight, flight dynamics is a useful concept, along with a set of principles, widely used in aircraft, spacecraft, and satellites.
This concept uses the understanding of three quantities (force, speed, and time) to help scientists understand vehicles flying in outer space or through the air and their control, stability, and performance.

• 1.

### Which of these forces is applied to spacecraft flight dynamics?

• A.

Momentum

• B.

Gravitational force

• C.

Frictional force

• D.

Air resistance

• E.

Impulse

B. Gravitational force
Explanation
The gravitational force is applied to spacecraft flight dynamics. This force is responsible for keeping the spacecraft in orbit around a celestial body, such as the Earth or another planet. It is the force of attraction between the spacecraft and the celestial body it is orbiting. The gravitational force determines the trajectory and speed of the spacecraft, allowing it to maintain a stable orbit or travel to different celestial bodies.

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• 2.

### Which of these does not act on a spacecraft?

• A.

Air resistance

• B.

Gravitational force

• C.

Lift and drag

• D.

Propulsive force

A. Air resistance
Explanation
Air resistance does not act on a spacecraft. Air resistance is the force that opposes the motion of an object through the air. However, in the vacuum of space, there is no air or atmosphere to create resistance. Therefore, spacecraft are not affected by air resistance and can travel freely without this force acting upon them.

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• 3.

### Flight dynamics are used to study these factors except which one?

• A.

Momentum of vehicles flying through air

• B.

Performance of vehicles flying through air

• C.

Stability of vehicles flying through air

• D.

Control of vehicles flying through air

A. Momentum of vehicles flying through air
Explanation
Flight dynamics is the study of various factors related to vehicles flying through the air, such as their performance, stability, and control. However, it does not specifically focus on the momentum of these vehicles. Momentum is a concept in physics that relates to the mass and velocity of an object, and while it may be relevant in certain aspects of flight, it is not a primary factor studied in flight dynamics.

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• 4.

### In fixed-wing aircraft, which of these represents the angle of attack?

• A.

Alpha

• B.

Beta

• C.

Gamma

• D.

Trigonometric functions

A. AlpHa
Explanation
The angle of attack in fixed-wing aircraft refers to the angle between the oncoming airflow and the chord line of the wing. This angle, denoted by the Greek letter alpha, is crucial in determining the lift and drag forces acting on the aircraft. By adjusting the angle of attack, pilots can control the lift and therefore the altitude and speed of the aircraft. Beta, Gamma, and Trigonometric functions are not specifically related to the angle of attack in this context.

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• 5.

### In fixed-wing aircraft, which of these represents the angle of spaceship?

• A.

Alpha

• B.

Beta

• C.

Gamma

• D.

Trigonometric functions

B. Beta
Explanation
In fixed-wing aircraft, the angle of spaceship is represented by the term "Beta".

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• 6.

### What do the angles on the fixed-wing aircraft denote?

• A.

Vector direction of airspeed

• B.

Scalar direction of airspeed

• C.

Single direction of airspeed

• D.

Multiple directions of airspeed

A. Vector direction of airspeed
Explanation
The angles on the fixed-wing aircraft denote the vector direction of airspeed. A vector quantity has both magnitude and direction, and in this case, the angle of the aircraft indicates the direction in which the air is flowing relative to the aircraft. This is important for the pilot to know, as it affects the aircraft's performance and control.

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• 7.

### Which of these is the dominant force in spacecraft flight dynamics?

• A.

Lift and drag

• B.

Gravitation

• C.

Air resistance

• D.

Propulsive

B. Gravitation
Explanation
Gravitation is the dominant force in spacecraft flight dynamics because it is responsible for keeping the spacecraft in orbit around a celestial body, such as the Earth or the Moon. Gravitational forces determine the trajectory and speed of the spacecraft, as well as its ability to maintain a stable orbit. Lift and drag, air resistance, and propulsion are also important factors in spacecraft flight dynamics, but they are secondary to the gravitational force.

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• 8.

### Which is the set of dynamics applied to flight vehicles?

• A.

Rotational and translational

• B.

Rotational and linear

• C.

Linear and translational

• D.

Circulatory and translational

A. Rotational and translational
Explanation
The correct answer is rotational and translational. This is because flight vehicles, such as airplanes and helicopters, experience both rotational motion (around their center of gravity) and translational motion (in a straight line). Rotational motion is necessary for controlling the direction and stability of the vehicle, while translational motion allows the vehicle to move forward or backward. Therefore, both dynamics are applied to flight vehicles.

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• 9.

### What are the critical parameters of flight dynamics called?

• A.

Flight-time

• B.

Angle of rotation

• C.

The way of air

• D.

Angle of moment

B. Angle of rotation
Explanation
The critical parameters of flight dynamics are called "Angle of rotation". These parameters refer to the angles at which an aircraft rotates around its various axes, such as roll, pitch, and yaw. The angle of rotation is crucial in determining the stability, control, and maneuverability of an aircraft during flight. It affects the aircraft's ability to maintain its desired flight path, perform turns, and recover from disturbances or maneuvers.

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• 10.

### What are the three aircraft principal axes?

• A.

Yaw, roll, and pull

• B.

Roll, push, and pull

• C.

Roll, pull, and yaw

• D.

Roll, pitch and yaw

D. Roll, pitch and yaw
Explanation
The three principal axes of an aircraft are roll, pitch, and yaw. Roll refers to the rotation of the aircraft around its longitudinal axis, causing one wing to rise while the other lowers. Pitch is the rotation around the lateral axis, causing the nose of the aircraft to move up or down. Yaw is the rotation around the vertical axis, causing the aircraft to turn left or right. These three axes are essential for controlling the movement and stability of an aircraft in flight.

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• Mar 21, 2023
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• Jun 18, 2018
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