1 What is the normal flight altitude of a civil jet aircraft?

The flight altitude of civil aircraft Hot recommended font: small large].

The flight altitude of a civil aircraft.

The flight altitude layer of a civil aircraft.

Medium-sized and above civil aircraft are flying at high altitude, which refers to the space at an altitude of 7,000-12,000 meters. In this space, there are 1 height layer of 1 km, which is divided into 6 height layers: 7 km, 8 km, 9 km, 10,000 m, 11,000 km and 12,000 km.

High-altitude aircraft are only allowed to fly at a given altitude.

In addition, when civil aircraft fly, the zero degree limit is due south and north, and all aircraft heading to the right (east) fly even high-level layers, that is, 8 kilometers, 10,000 meters, and 12,000 kilometers of altitude layers; All aircraft heading to the left (west) fly in the singular altitude layer, i.e. 7 km, 9 km, 11,000 km altitude layer.

For example, a civil aircraft flies from Beijing to Hangzhou, which is located in the easterly direction south of Beijing, and the aircraft segment flies at an even number of altitude levels, and the return flight flies at a singular number of altitude levels. Another example is that the plane flies from Shenyang to Hangzhou, and Hangzhou is west to the south of Shenyang, and the plane must fly in a single altitude layer, and on the return journey, it must fly in a double number layer.

In this way, the planes flying in opposite directions are not at the same altitude and avoid collisions.

The maximum flight altitude of different aircraft.

Short-route aircraft generally fly at 6,000 meters to 9,600 meters, long-route aircraft generally fly at 8,000 meters to 12,600 meters, and the maximum flight altitude of ordinary civil airliners will not exceed 12,600 meters, and some business jets can fly at an altitude of 15,000 meters.

Boeing 737-300 (Boeing 737-300 aircraft).

Captain: 32 8

Height (m) 4 01

Maximum number of seats 145

Maximum payload (kg) 15200

Maximum flight altitude (m) 11280

Range (km) 5460

Maximum cruising speed (km/h) 831

Boeing 757-200 aircraft).

Captain: height (m).

Maximum number of seats 200

Maximum payload (kg) 24460

Maximum flight altitude (m) 11280

Range (km) 6319

Maximum cruising speed (km/h) 928

Boeing 777-200 aircraft).

Boeing Aircraft Company of the United States.

Captain: height (m).

Maximum number of seats 380

Maximum payload (kg) 54930

Maximum flight altitude (m) 15000

Maximum cruising speed (km/h) 940

Why are civil aviation crews and passengers not equipped with parachutes?

The flight altitude of civil aircraft is significantly higher than the altitude of parachuting, the air is thin, ultra-low temperature, and the person who parachutes.

When it descends to a survivable altitude (4,000 meters), it will already become a rigid corpse, even if the plane is rising.

Steeply descending to a low altitude, the strong relative air currents at a speed of about 400 km/h will also blow the skydiver to the tail and hit the wing.

Dead, so most of the planes used for parachuting are tail doors. Not to mention the fact that the untrained skydive, when grounded.

It's similar to jumping off a building, so neither the civil crew nor the passengers are equipped with a parachute.

Technically, the cruising speed of an aircraft can be referred to as "normal flight speed".

Because this speed can fly for a long time, it is more fuel-efficient, and the pilot does not feel too tired, and the cruising speed of the new generation of military jets is generally about 7 knots per minute, or 420 knots per hour. or between the speed of sound.

.This is true even for supersonic fighter aircraft.

Unless necessary, in the case of air combat, the "normal flight speed" is exceeded

Varies , the advanced ones are capable of cruising at supersonic speeds or even at double sonic speeds.

In 1949, the British company de Haweland developed the first large jet passenger aircraft, the "Comet 1", which doubled the passenger capacity (up to 80 people), flew at a speed of more than 800 kilometers per hour, and reached an altitude of 10,000 meters. The Comet is powered by four Phantom turbojet engines, each producing 2,250 kilograms of thrust, meaning Britain wants to lead the world in civil aviation. With a design speed of 800 kilometers per hour and a flight altitude of 12,000 meters, the large airliner is twice as fast and at an altitude of any aircraft available.

The fuel is stored in tanks inside the wings, which are designed so smooth that the flight brakes must be used to slow down when landing. Compared with the piston engine passenger aircraft, the new generation of passenger aircraft has the characteristics of large passenger capacity, high flight speed, increased flight altitude, long range and pressurized cabin.

For the sake of convenience, let's ignore drag and mass changes due to fuel consumption (these effects are far less than the energy of the aircraft to fly, which is negligible).

The first thing to be sure of is that momentum is conserved, so.

mv=-mv

where m is the mass of the aircraft, m is the mass of the jet, v is the speed of the aircraft, and v is the velocity of the gas, it can be clearly found that the two velocity directions are opposite, and the mass of the aircraft is definitely greater than the mass of the ejected gas, that is, m m

So v, that is, the speed is the opposite, greater than the flight speed.

According to the momentum formula, if the velocity of the gas is the speed of sound, then the airplane must also be the speed of sound, and it will eject half of its mass per unit of time. Doesn't seem realistic?

So the gas is definitely already above the speed of sound.

In fact, supersonic aircraft's air intake and tail nozzles are designed to allow the gas to reach above the speed of sound.

You may be talking about a speed of 9,000 kilometers per hour, 1Conversion; 9,000 km-h = 9,000 km 60 minutes = 150 km Bridge split clock = 150,000 60 seconds = 250 m seconds.

2.If you ride a bicycle (at a speed of about 5 meters per second), you need to take t=s v=9,000,000 meters 5 meters per second = 1,800,000 seconds = 30,000 minutes = 500 hours.

Jumbo jet jets fly at speeds of up to 150 kilometers per minute. Riding a bicycle at a speed of 5 meters per second takes 500 hours to complete this bridge journey.