Is the steering gear for fixed wing?

There are four servos in one ***! Generally speaking, the model has four channels, controlling direction, lift, power (throttle) and aileron (swaying the wings left and right). So basically there are four servos. But if it is electric and the engine is controlled by an electronic governor, one can be omitted. Sometimes two aileron servos are used for precise and powerful operation. One on each side. So usually 4 is enough.

The so-called fixed-wing aircraft refers to an aircraft whose wing position, sweep angle and other parameters are fixed; compared with some modern supersonic aircraft, when flying at base speed, in order to obtain a larger Lift, the wings extend larger (the sweep angle is smaller), and as the aircraft speed increases during flight, the sweep angle can change and increase. This is no longer a fixed-wing aircraft, but is typically a helicopter, which is also called a helicopter. Rotorcraft does not have fixed wings; carrier-based aircraft fold their wings in order to reduce the floor space when parked; but if the wings cannot fold or change their angle during flight, they are still classified as fixed-wing aircraft. At present, all civil aviation passenger aircraft are fixed-wing aircraft. Fixed-wing aircraft or fixed-wing aeroplane, often referred to as aircraft (English: aeroplane), refers to the forward thrust or pull generated by the power device, the lift generated by the fixed wings of the fuselage, and flying in the atmosphere. A heavier-than-air aircraft. The aircraft in today's world are mainly fixed-wing aircraft.

Deformation of fixed-wing aircraft

There is also a variable-sweep wing aircraft, that is, an aircraft whose wing sweep angle can be changed during flight, which is also a fixed-wing aircraft. The small aspect ratio and large swept wings widely used in modern supersonic aircraft have small supersonic drag, but low aerodynamic efficiency at low speeds and poor lift characteristics. Using a large aspect ratio wing with a small sweep angle that is good at low speed will worsen the supersonic performance. Variable swept wing aircraft can solve the conflict between high and low speed performance requirements by changing the wing sweep angle. The aircraft uses a larger sweep angle during takeoff, landing and low-speed flight. At this time, the wing aspect ratio is the largest, so it has high low-speed cruise efficiency and large takeoff and landing lift. When flying at supersonic speed, using a smaller sweep angle will reduce the aspect ratio and relative thickness of the wing, which is very beneficial to reducing the resistance of supersonic flight. In addition, when supersonic bombers and attack aircraft fly at ultra-low altitude and high speed, in order to reduce the turbulence caused by unstable airflow, the wings are also required to have a small sweep angle and a small aspect ratio. Modern variable-sweep wing aircraft are commonly used in multi-purpose fighters, fighter-bombers and strategic bombers, such as the Soviet Union's MiG-23 fighter, Tu-160 strategic bomber, Western Europe's "Tornado" and the United States' F-14 fighter, B-1 Strategic bombers are all swept-wing aircraft.

Characteristics of fixed-wing aircraft

Compared with other means of transportation, fixed-wing aircraft have many advantages:

Fast speed. The current cruising speed of jetliners is about 900 kilometers per hour.

High mobility. The flight of fixed-wing aircraft is not blocked by mountains, rivers, deserts and oceans, and flights can be increased at any time according to the number of passengers and cargo.

Safe and comfortable. According to statistics from the International Civil Aviation Organization, the average number of fatalities per 100 million passenger kilometers in civil aviation is 0.04, which is one-tenth to one-hundredth of the number of fatalities in road traffic accidents. It is ranked as the safest mode of transportation along with railway transportation.

But fixed-wing aircraft also have their own limitations as a means of transportation:

They are expensive. Both the fixed-wing aircraft themselves and the fuel consumed by fixed-wing aircraft are much more expensive than other modes of transportation.

Affected by weather conditions. Although aviation technology can now adapt to most meteorological conditions, severe weather conditions such as wind, rain, snow, and fog can still affect the safety of aircraft taking off and landing.

There are restrictions on the take-off and landing sites. Most fixed-wing aircraft need to take off and land at the airport, which requires a long runway for takeoff and landing, and the requirements for takeoff and landing are relatively strict.

Certain danger. Although the number of fatalities per 100 million passenger kilometers of civil aviation passenger aircraft is much lower than that of other common means of transportation, the survival rate of flight accidents is very low, so the public's psychological feeling is still somewhat dangerous.

In addition, although fixed-wing aircraft continue to improve fuel efficiency, every kilogram of fuel consumed during flight will emit 3 kilograms of carbon dioxide, and the gas is emitted directly in the atmosphere, which has a greater impact on global warming than ground emissions. Be big.