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Quality

Quality of the aircraft and the effectiveness of its use as a vehicle defined by its flight characteristics, reliability, durability and safety.
The last three indicators assess the quality does not distinguish the aircraft from other modes of transport, for the same flight characteristics has its own peculiarities.

Main features

Flight characteristics

By the flight characteristics generally include speed, range, altitude (ceiling), rate of climb, maneuverability, takeoff and landing performance and capacity. For, aircraft for various purposes, these characteristics not equal in their significance. For example, for a fighter-interceptor, the main purpose is to intercept and defeat in the air planes and other aircraft types by the enemy, particularly important will be not only high speed and high altitude, but also a great climb and maneuverability.
For passenger and transport aircraft are the most important payload, range and takeoff and landing characteristics enable the use of their existing airfields.
There are conventional in the technical literature to determine the flight characteristics of aircraft.

Maximum speed

the speed steady level flight when using full power, or thrust propulsion system. Speed ​​is one of the main indicators characterizing the quality of the aircraft. Range - the greatest distance that the aircraft can fly in a straight line without replenishment of fuel.
Flight distance depends on the altitude and flight speed.

Ceiling of the plane

Ceiling of the plane - is the ultimate height to which the aircraft can climb and he can still make level flight, but it can not climb (vertical velocity is zero). This height is called the theoretical ceiling, since it is practically impossible to use. In contrast to the theoretical ceiling - is the height at which the aircraft still has some conventionally accepted vertical speed for the climb. For piston aircraft is assumed that this rate should not exceed 0,5 m / s jet of 5 m / sec. There is a concept of dynamic ceiling, which refers to the height attainable by plane, not only at the expense of full power or thrust, but also due to supply kinetic energy acquired by air to disperse before the climb. Service ceiling - height substantially greater than the theoretical ceiling of the aircraft.

Terms

Rate of climb - the time set by plane given height. Rate of climb depends on the vertical ascent rate.
Maneuverability - ability of an aircraft in flight to perform a particular maneuver.
Typically, a maneuver characterized by the time of its execution, the value of congestion when the trajectory and other parameters.