Aerofoil Pada Sayap Pesawat Terbang | Praktikum dan Penerapan Hukum Bernoulli (Fluida Dinamis)

Summary

This video demonstrates a physics practicum on the effect of airfoils on airplane wings. The experiment compares two types of airplane wings: one with an airfoil (curved shape) and the other flat, showing how the airfoil generates lift when exposed to wind from a fan. Based on Bernoulli's principle, the increase in airspeed over the curved surface reduces air pressure, resulting in lift. The video explains the science behind airplane flight, including the relationship between airspeed, pressure, and the lift force that enables flight. A practical illustration shows the clear difference between the two wing types in action.

Takeaways

• 😀 Airplanes can fly due to the lift force generated by the shape of the airplane wings, specifically airfoils.
• 😀 An airfoil is a wing shape designed with a curved upper surface to increase the speed of air above the wing, creating a pressure difference.
• 😀 Bernoulli’s law explains the principle behind the lift force: as airspeed increases, pressure decreases.
• 😀 The main difference between airfoil and non-airfoil wings is that airfoils create lift due to their curved shape, while flat wings do not.
• 😀 The experiment demonstrates that when wind from a fan hits an airfoil, it is lifted immediately due to the pressure difference above and below the wing.
• 😀 When a non-airfoil wing is tilted, it can generate lift, but only by adjusting its angle, unlike the airfoil which is automatically lifted by the wind.
• 😀 Lift force is a result of the vortex flow created by pressure differences between the top and bottom surfaces of the wing.
• 😀 The mathematical formula for lift is: F = ½ ρ (V2² - V1²) A, where F is the lift force, ρ is air density, V1 and V2 are air velocities below and above the wing, and A is the wing area.
• 😀 The experiment uses foam, satay sticks, and a fan to simulate the airflow around the wings and demonstrate the effects of airfoils.
• 😀 Airfoils are crucial in real-world applications, such as in fighter planes, where the angle of the wing significantly impacts lift generation.

Q & A

What is the purpose of the experiment conducted in the video?

The purpose of the experiment is to prove the difference between an airfoil and a non-airfoil on airplane wings, specifically how they affect lift.

What are the tools used in the physics practicum?

The tools used in the practicum include foam, satay sticks, a fan, and plastic straws for constructing the airplane wing models.

What happens when the airfoil is exposed to wind from the fan?

When the airfoil is exposed to wind from the fan, it is lifted upwards due to the shape of the airfoil, which causes a pressure difference and generates lift.

What happens to the non-airfoil wing when exposed to the wind from the fan?

The non-airfoil wing is not lifted when exposed to wind from the fan because its shape is flat, which does not create the necessary pressure difference for lift.

Why does tilting the non-airfoil wing cause it to lift?

Tilting the non-airfoil wing allows it to generate lift due to the angle of attack, which alters the airflow and creates a pressure difference between the top and bottom of the wing.

How does Bernoulli's law relate to the lift generated by the wings?

According to Bernoulli's law, the increase in airspeed over the top of the airfoil causes lower pressure, while the slower air underneath the wing creates higher pressure, resulting in lift.

What is the force responsible for lifting an airplane?

The force responsible for lifting an airplane is called lift, which is generated by the pressure difference between the top and bottom of the wings, as described by Bernoulli's law.

What does the lift equation represent in the context of the experiment?

The lift equation, F1 - F2 = 1/2 * ρ * (V2² - V1²) * A, represents the difference in pressure between the upper and lower surfaces of the wing, which results in the lift force acting on the airplane.

How does the shape of an airfoil contribute to lift?

The shape of an airfoil is designed to curve upwards, causing air to flow faster over the top and slower underneath. This difference in airspeed creates a pressure difference, generating lift.

What is the application of the lift principle in real-world aviation?

The principle of lift, as explained in the experiment, is applied in the design of airplane wings, where the airfoil shape allows planes to generate lift and fly.