Little Eagle Helicopter Course Presentation

  Because the air flows faster on the upper surface of the wing and slower on the lower surface, a pressure difference is formed. The product of the pressure difference and the area of the wing is lift. This is how an airplane flies. During the early 20th century, when twin-wing aircraft were the main type, the engine power was insufficient, and the aircraft speed was not high. Therefore, it was necessary to rely on a large enough wing area to provide lift. Since the aircraft could not be made infinite in size, the use of multiple wings was to provide enough wing area (even the appearance of tri-wing aircraft). During this period, the speed of the aircraft was below 400 km/h. Single-wing aircraft appeared in the late 20th century to the present. With the development of engine technology and the successful research and development of high-horsepower engines, the speed of the aircraft has become faster and the wing area no longer needs to be large. In addition, due to weight and drag issues (the aircraft requires to be as light as possible and the smaller the drag the better, the drag and weight ratio of multi-wing is larger than that of single-wing), the twin-wing aircraft were abandoned. During this period, the speed of the aircraft was between 400 km/h and more than three times the speed of sound. Compared with single-wing aircraft, twin-wing aircraft have better stability and flexibility in flight control (because the controllable wing area is larger and the speed is low), but they are completely at a disadvantage in terms of speed.

Experimental Objective: 1. To understand the airscrew propeller - a device that converts the rotational power of an engine into thrust or lift by rotating the blades in the air, commonly known as a propeller.


Experimental Cognition
Foam Wing: The wing is one of the important components of an aircraft, mounted on the fuselage. Its primary function is to generate lift.
Propeller: A propeller is a device that converts the rotational power of an engine into forward thrust by rotating the blades in the air. It consists of two or more blades connected to a hub, with the rear side of the blades being a spiral surface or approximately a spiral surface. It is a type of ship propulsion.
The propeller is divided into many types and is widely applied, such as in airplanes, ships, etc.

Wooden Body: High-quality and Environmental-friendly Wood
Rubber Band: Imported Rubber Band

Experimental steps:
1. Experiment preparation: Recognize the experimental equipment: foam wing, propeller, wooden body, rubber band.

Experiment Report:
In the early stages of aircraft development, engines had low power and were heavy, and the materials used to construct the fuselage were mostly wood and canvas. To solve the problem of taking off, larger wing areas were needed to generate enough lift at low speeds. Biplanes have two wing surfaces, which provide a larger total wing area.

Company Profile

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