Last updated

The Cessna 172 Skyhawk is the most produced aircraft in history. Cessna 172S Skyhawk 'G-JMKE' (45077563364).jpg
The Cessna 172 Skyhawk is the most produced aircraft in history.

An aircraft is a vehicle that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, [1] or in a few cases the downward thrust from jet engines. Common examples of aircraft include airplanes, helicopters, airships (including blimps), gliders, paramotors, and hot air balloons. [2]


The human activity that surrounds aircraft is called aviation . The science of aviation, including designing and building aircraft, is called aeronautics. Crewed aircraft are flown by an onboard pilot, but unmanned aerial vehicles may be remotely controlled or self-controlled by onboard computers. Aircraft may be classified by different criteria, such as lift type, aircraft propulsion, usage and others.


Flying model craft and stories of manned flight go back many centuries; however, the first manned ascent — and safe descent — in modern times took place by larger hot-air balloons developed in the 18th century. Each of the two World Wars led to great technical advances. Consequently, the history of aircraft can be divided into five eras:

Methods of lift

Lighter than air – aerostats

Hot air balloons Colorado Springs Hot Air Balloon Competition.jpg
Hot air balloons

Aerostats use buoyancy to float in the air in much the same way that ships float on the water. They are characterized by one or more large cells or canopies, filled with a relatively low-density gas such as helium, hydrogen, or hot air, which is less dense than the surrounding air. When the weight of this is added to the weight of the aircraft structure, it adds up to the same weight as the air that the craft displaces.

Small hot-air balloons, called sky lanterns, were first invented in ancient China prior to the 3rd century BC and used primarily in cultural celebrations, and were only the second type of aircraft to fly, the first being kites, which were first invented in ancient China over two thousand years ago. (See Han Dynasty)

Airship USS Akron over Manhattan in the 1930s USS Akron (ZRS-4) in flight over Manhattan, circa 1931-1933.jpg
Airship USS Akron over Manhattan in the 1930s

A balloon was originally any aerostat, while the term airship was used for large, powered aircraft designs — usually fixed-wing. [3] [4] [5] [6] [7] [8] In 1919, Frederick Handley Page was reported as referring to "ships of the air," with smaller passenger types as "Air yachts." [9] In the 1930s, large intercontinental flying boats were also sometimes referred to as "ships of the air" or "flying-ships". [10] [11]  — though none had yet been built. The advent of powered balloons, called dirigible balloons, and later of rigid hulls allowing a great increase in size, began to change the way these words were used. Huge powered aerostats, characterized by a rigid outer framework and separate aerodynamic skin surrounding the gas bags, were produced, the Zeppelins being the largest and most famous. There were still no fixed-wing aircraft or non-rigid balloons large enough to be called airships, so "airship" came to be synonymous with these aircraft. Then several accidents, such as the Hindenburg disaster in 1937, led to the demise of these airships. Nowadays a "balloon" is an unpowered aerostat and an "airship" is a powered one.

A powered, steerable aerostat is called a dirigible . Sometimes this term is applied only to non-rigid balloons, and sometimes dirigible balloon is regarded as the definition of an airship (which may then be rigid or non-rigid). Non-rigid dirigibles are characterized by a moderately aerodynamic gasbag with stabilizing fins at the back. These soon became known as blimps . During World War II, this shape was widely adopted for tethered balloons; in windy weather, this both reduces the strain on the tether and stabilizes the balloon. The nickname blimp was adopted along with the shape. In modern times, any small dirigible or airship is called a blimp, though a blimp may be unpowered as well as powered.

Heavier-than-air – aerodynes

Heavier-than-air aircraft, such as airplanes, must find some way to push air or gas downwards so that a reaction occurs (by Newton's laws of motion) to push the aircraft upwards. This dynamic movement through the air is the origin of the term. There are two ways to produce dynamic upthrust aerodynamic lift, and powered lift in the form of engine thrust.

Aerodynamic lift involving wings is the most common, with fixed-wing aircraft being kept in the air by the forward movement of wings, and rotorcraft by spinning wing-shaped rotors sometimes called "rotary wings." A wing is a flat, horizontal surface, usually shaped in cross-section as an aerofoil. To fly, air must flow over the wing and generate lift. A flexible wing is a wing made of fabric or thin sheet material, often stretched over a rigid frame. A kite is tethered to the ground and relies on the speed of the wind over its wings, which may be flexible or rigid, fixed, or rotary.

With powered lift, the aircraft directs its engine thrust vertically downward. V/STOL aircraft, such as the Harrier jump jet and Lockheed Martin F-35B take off and land vertically using powered lift and transfer to aerodynamic lift in steady flight.

A pure rocket is not usually regarded as an aerodyne because it does not depend on the air for its lift (and can even fly into space); however, many aerodynamic lift vehicles have been powered or assisted by rocket motors. Rocket-powered missiles that obtain aerodynamic lift at very high speed due to airflow over their bodies are a marginal case.


An Airbus A380, the world's largest passenger airliner Emirates Airbus A380-861 A6-EER MUC 2015 04.jpg
An Airbus A380, the world's largest passenger airliner

The forerunner of the fixed-wing aircraft is the kite. Whereas a fixed-wing aircraft relies on its forward speed to create airflow over the wings, a kite is tethered to the ground and relies on the wind blowing over its wings to provide lift. Kites were the first kind of aircraft to fly and were invented in China around 500 BC. Much aerodynamic research was done with kites before test aircraft, wind tunnels, and computer modelling programs became available.

The first heavier-than-air craft capable of controlled free-flight were gliders. A glider designed by George Cayley carried out the first true manned, controlled flight in 1853.

The practical, powered, fixed-wing aircraft (the airplane or aeroplane) was invented by Wilbur and Orville Wright. Besides the method of propulsion, fixed-wing aircraft are in general characterized by their wing configuration. The most important wing characteristics are:

  • Number of wings monoplane, biplane, etc.
  • Wing support — Braced or cantilever, rigid, or flexible.
  • Wing planform — including aspect ratio, angle of sweep, and any variations along the span (including the important class of delta wings).
  • Location of the horizontal stabilizer, if any.
  • Dihedral angle  — positive, zero, or negative (anhedral).

A variable geometry aircraft can change its wing configuration during flight.

A flying wing has no fuselage, though it may have small blisters or pods. The opposite of this is a lifting body , which has no wings, though it may have small stabilizing and control surfaces.

Wing-in-ground-effect vehicles are generally not considered aircraft. [12] They "fly" efficiently close to the surface of the ground or water, like conventional aircraft during takeoff. An example is the Russian ekranoplan nicknamed the "Caspian Sea Monster". Man-powered aircraft also rely on ground effect to remain airborne with minimal pilot power, but this is only because they are so underpowered—in fact, the airframe is capable of flying higher.

Aircraft parked on the ground in Afghanistan Flightline at Kabul International Airport.jpeg
Aircraft parked on the ground in Afghanistan


An autogyro 20100627 Xenon2 Krakow 1328.jpg
An autogyro

Rotorcraft, or rotary-wing aircraft, use a spinning rotor with aerofoil cross-section blades (a rotary wing) to provide lift. Types include helicopters, autogyros, and various hybrids such as gyrodynes and compound rotorcraft.

Helicopters have a rotor turned by an engine-driven shaft. The rotor pushes air downward to create lift. By tilting the rotor forward, the downward flow is tilted backward, producing thrust for forward flight. Some helicopters have more than one rotor and a few have rotors turned by gas jets at the tips. Some have a tail rotor to counteract the rotation of the main rotor, and to aid directional control.

Autogyros have unpowered rotors, with a separate power plant to provide thrust. The rotor is tilted backward. As the autogyro moves forward, air blows upward across the rotor, making it spin. This spinning increases the speed of airflow over the rotor, to provide lift. Rotor kites are unpowered autogyros, which are towed to give them forward speed or tethered to a static anchor in high-wind for kited flight.

Cyclogyros rotate their wings about a horizontal axis.

Compound rotorcraft have wings that provide some or all of the lift in forward flight. They are nowadays classified as powered lift types and not as rotorcraft. Tiltrotor aircraft (such as the Bell Boeing V-22 Osprey), tiltwing, tail-sitter, and coleopter aircraft have their rotors/propellers horizontal for vertical flight and vertical for forward flight.

Other methods of lift

X-24B lifting body X-24B on Lakebed - GPN-2000-000209.jpg
X-24B lifting body
  • A lifting body is an aircraft body shaped to produce lift. If there are any wings, they are too small to provide significant lift and are used only for stability and control. Lifting bodies are not efficient: they suffer from high drag, and must also travel at high speed to generate enough lift to fly. Many of the research prototypes, such as the Martin Marietta X-24, which led up to the Space Shuttle, were lifting bodies, though the Space Shuttle is not, and some supersonic missiles obtain lift from the airflow over a tubular body.
  • Powered lift types rely on engine-derived lift for vertical takeoff and landing (VTOL). Most types transition to fixed-wing lift for horizontal flight. Classes of powered lift types include VTOL jet aircraft (such as the Harrier jump jet) and tiltrotors, such as the Bell Boeing V-22 Osprey, among others. A few experimental designs rely entirely on engine thrust to provide lift throughout the whole flight, including personal fan-lift hover platforms and jetpacks. VTOL research designs include the Rolls-Royce Thrust Measuring Rig.
  • The Flettner airplane uses a rotating cylinder in place of a fixed wing, obtaining lift from the Magnus effect.
  • The ornithopter obtains thrust by flapping its wings.

Size and speed extremes


The smallest aircraft are toys/recreational items, and nano aircraft.

The largest aircraft by dimensions and volume (as of 2016) is the 302 ft (92 m) long British Airlander 10, a hybrid blimp, with helicopter and fixed-wing features, and reportedly capable of speeds up to 90 mph (140 km/h; 78 kn), and an airborne endurance of two weeks with a payload of up to 22,050 lb (10,000 kg). [13] [14] [15]

The largest aircraft by weight and largest regular fixed-wing aircraft ever built, as of 2016, was the Antonov An-225 Mriya. That Ukrainian-built six-engine Russian transport of the 1980s was 84 m (276 ft) long, with an 88 m (289 ft) wingspan. It holds the world payload record, after transporting 428,834 lb (194,516 kg) of goods, and has flown 100 t (220,000 lb) loads commercially. With a maximum loaded weight of 550–700 t (1,210,000–1,540,000 lb), it was also the heaviest aircraft built to date. It could cruise at 500 mph (800 km/h; 430 kn). [16] [17] [18] [19] [20] The aircraft was destroyed during the Russo-Ukrainian War.[ citation needed ]

The largest military airplanes are the Ukrainian Antonov An-124 Ruslan (world's second-largest airplane, also used as a civilian transport), [21] and American Lockheed C-5 Galaxy transport, weighing, loaded, over 380 t (840,000 lb). [20] [22] The 8-engine, piston/propeller Hughes H-4 Hercules "Spruce Goose" — an American World War II wooden flying boat transport with a greater wingspan (94m/260ft) than any current aircraft and a tail height equal to the tallest (Airbus A380-800 at 24.1m/78ft) — flew only one short hop in the late 1940s and never flew out of ground effect. [20]

The largest civilian airplanes, apart from the above-noted An-225 and An-124, are the Airbus Beluga cargo transport derivative of the Airbus A300 jet airliner, the Boeing Dreamlifter cargo transport derivative of the Boeing 747 jet airliner/transport (the 747-200B was, at its creation in the 1960s, the heaviest aircraft ever built, with a maximum weight of over 400 t (880,000 lb)), [22] and the double-decker Airbus A380 "super-jumbo" jet airliner (the world's largest passenger airliner). [20] [23]


The fastest recorded powered aircraft flight and fastest recorded aircraft flight of an air-breathing powered aircraft was of the NASA X-43A Pegasus, a scramjet-powered, hypersonic, lifting body experimental research aircraft, at Mach 9.6, exactly 3,292.8 m/s (11,854 km/h; 6,400.7 kn; 7,366 mph). The X-43A set that new mark, and broke its own world record of Mach 6.3, exactly 2,160.9 m/s (7,779 km/h; 4,200.5 kn; 4,834 mph), set in March 2004, on its third and final flight on 16 November 2004. [24] [25]

Prior to the X-43A, the fastest recorded powered airplane flight (and still the record for the fastest manned, powered airplane / fastest manned, non-spacecraft aircraft) was of the North American X-15A-2, rocket-powered airplane at Mach 6.72, or 2,304.96 m/s (8,297.9 km/h; 4,480.48 kn; 5,156.0 mph), on 3 October 1967. On one flight it reached an altitude of 354,300 ft (108,000 m). [26] [27] [28]

The fastest known, production aircraft (other than rockets and missiles) currently or formerly operational (as of 2016) are:

Note: Some sources refer to the above-mentioned X-15 as the "fastest military airplane" because it was partly a project of the U.S. Navy and Air Force; however, the X-15 was not used in non-experimental actual military operations. [28]


Unpowered aircraft

Sailplane (Rolladen-Schneider LS4) PH-1274 Rolladen-Schneider LS-4b.JPG
Sailplane (Rolladen-Schneider LS4)

Gliders are heavier-than-air aircraft that do not employ propulsion once airborne. Take-off may be by launching forward and downward from a high location, or by pulling into the air on a tow-line, either by a ground-based winch or vehicle, or by a powered "tug" aircraft. For a glider to maintain its forward air speed and lift, it must descend in relation to the air (but not necessarily in relation to the ground). Many gliders can "soar", i.e., gain height from updrafts such as thermal currents. The first practical, controllable example was designed and built by the British scientist and pioneer George Cayley, whom many recognise as the first aeronautical engineer. Common examples of gliders are sailplanes, hang gliders and paragliders.

Balloons drift with the wind, though normally the pilot can control the altitude, either by heating the air or by releasing ballast, giving some directional control (since the wind direction changes with altitude). A wing-shaped hybrid balloon can glide directionally when rising or falling; but a spherically shaped balloon does not have such directional control.

Kites are aircraft [42] that are tethered to the ground or other object (fixed or mobile) that maintains tension in the tether or kite line; they rely on virtual or real wind blowing over and under them to generate lift and drag. Kytoons are balloon-kite hybrids that are shaped and tethered to obtain kiting deflections, and can be lighter-than-air, neutrally buoyant, or heavier-than-air.

Powered aircraft

Powered aircraft have one or more onboard sources of mechanical power, typically aircraft engines although rubber and manpower have also been used. Most aircraft engines are either lightweight reciprocating engines or gas turbines. Engine fuel is stored in tanks, usually in the wings but larger aircraft also have additional fuel tanks in the fuselage.

Propeller aircraft

A turboprop-engined DeHavilland Twin Otter adapted as a floatplane WestCoastAirFloatplane.jpg
A turboprop-engined DeHavilland Twin Otter adapted as a floatplane

Propeller aircraft use one or more propellers (airscrews) to create thrust in a forward direction. The propeller is usually mounted in front of the power source in tractor configuration but can be mounted behind in pusher configuration . Variations of propeller layout include contra-rotating propellers and ducted fans .

Many kinds of power plant have been used to drive propellers. Early airships used man power or steam engines. The more practical internal combustion piston engine was used for virtually all fixed-wing aircraft until World War II and is still used in many smaller aircraft. Some types use turbine engines to drive a propeller in the form of a turboprop or propfan. Human-powered flight has been achieved, but has not become a practical means of transport. Unmanned aircraft and models have also used power sources such as electric motors and rubber bands.

Jet aircraft

Lockheed Martin F-22A Raptor Lockheed Martin F-22A Raptor JSOH.jpg
Lockheed Martin F-22A Raptor

Jet aircraft use airbreathing jet engines, which take in air, burn fuel with it in a combustion chamber, and accelerate the exhaust rearwards to provide thrust.

Different jet engine configurations include the turbojet and turbofan, sometimes with the addition of an afterburner. Those with no rotating turbomachinery include the pulsejet and ramjet. These mechanically simple engines produce no thrust when stationary, so the aircraft must be launched to flying speed using a catapult, like the V-1 flying bomb, or a rocket, for example. Other engine types include the motorjet and the dual-cycle Pratt & Whitney J58.

Compared to engines using propellers, jet engines can provide much higher thrust, higher speeds and, above about 40,000 ft (12,000 m), greater efficiency. [43] They are also much more fuel-efficient than rockets. As a consequence nearly all large, high-speed or high-altitude aircraft use jet engines.


Some rotorcraft, such as helicopters, have a powered rotary wing or rotor , where the rotor disc can be angled slightly forward so that a proportion of its lift is directed forwards. The rotor may, like a propeller, be powered by a variety of methods such as a piston engine or turbine. Experiments have also used jet nozzles at the rotor blade tips.

Other types of powered aircraft

  • Rocket-powered aircraft have occasionally been experimented with, and the Messerschmitt Me 163 Komet fighter even saw action in the Second World War. Since then, they have been restricted to research aircraft, such as the North American X-15, which traveled up into space where air-breathing engines cannot work (rockets carry their own oxidant). Rockets have more often been used as a supplement to the main power plant, typically for the rocket-assisted take off of heavily loaded aircraft, but also to provide high-speed dash capability in some hybrid designs such as the Saunders-Roe SR.53.
  • The ornithopter obtains thrust by flapping its wings. It has found practical use in a model hawk used to freeze prey animals into stillness so that they can be captured, and in toy birds.

Design and construction

Aircraft are designed according to many factors such as customer and manufacturer demand, safety protocols and physical and economic constraints. For many types of aircraft the design process is regulated by national airworthiness authorities.

The key parts of an aircraft are generally divided into three categories:


The approach to structural design varies widely between different types of aircraft. Some, such as paragliders, comprise only flexible materials that act in tension and rely on aerodynamic pressure to hold their shape. A balloon similarly relies on internal gas pressure, but may have a rigid basket or gondola slung below it to carry its payload. Early aircraft, including airships, often employed flexible doped aircraft fabric covering to give a reasonably smooth aeroshell stretched over a rigid frame. Later aircraft employed semi-monocoque techniques, where the skin of the aircraft is stiff enough to share much of the flight loads. In a true monocoque design there is no internal structure left. With the recent emphasis on sustainability hemp has picked up some attention, having a way smaller carbon foot print and 10 times stronger than steel, hemp could become the standard of manufacturing in the future. [50]

The key structural parts of an aircraft depend on what type it is.


Lighter-than-air types are characterised by one or more gasbags, typically with a supporting structure of flexible cables or a rigid framework called its hull. Other elements such as engines or a gondola may also be attached to the supporting structure.


Airframe diagram for an AgustaWestland AW101 helicopter Merlin Airframe Material.jpg
Airframe diagram for an AgustaWestland AW101 helicopter

Heavier-than-air types are characterised by one or more wings and a central fuselage. The fuselage typically also carries a tail or empennage for stability and control, and an undercarriage for takeoff and landing. Engines may be located on the fuselage or wings. On a fixed-wing aircraft the wings are rigidly attached to the fuselage, while on a rotorcraft the wings are attached to a rotating vertical shaft. Smaller designs sometimes use flexible materials for part or all of the structure, held in place either by a rigid frame or by air pressure. The fixed parts of the structure comprise the airframe.


The source of motive power for an aircraft is normally called the powerplant, and includes engine or motor, propeller or rotor, (if any), jet nozzles and thrust reversers (if any), and accessories essential to the functioning of the engine or motor (e.g.: starter, ignition system, intake system, exhaust system, fuel system, lubrication system, engine cooling system, and engine controls). [44] [45] [48]

Powered aircraft are typically powered by internal combustion engines (piston [51] or turbine [52] ) burning fossil fuels -- typically gasoline (avgas) or jet fuel. A very few are powered by rocket power, ramjet propulsion, or by electric motors, or by internal combustion engines of other types, or using other fuels. A very few have been powered, for short flights, by human muscle energy (e.g.: Gossamer Condor). [53] [54] [55]


The avionics comprise any electronic aircraft flight control systems and related equipment, including electronic cockpit instrumentation, navigation, radar, monitoring, and communications systems. [44] [45] [47] [49]

Flight characteristics

Flight envelope

The flight envelope of an aircraft refers to its approved design capabilities in terms of airspeed, load factor and altitude. [56] [57] The term can also refer to other assessments of aircraft performance such as maneuverability. When an aircraft is abused, for instance by diving it at too-high a speed, it is said to be flown outside the envelope, something considered foolhardy since it has been taken beyond the design limits which have been established by the manufacturer. Going beyond the envelope may have a known outcome such as flutter or entry to a non-recoverable spin (possible reasons for the boundary).


The Boeing 777-200LR is one of the longest-range airliners, capable of flights of more than halfway around the world. Boeing 777-200LR banking over mountain.jpg
The Boeing 777-200LR is one of the longest-range airliners, capable of flights of more than halfway around the world.

The range is the distance an aircraft can fly between takeoff and landing, as limited by the time it can remain airborne.

For a powered aircraft the time limit is determined by the fuel load and rate of consumption.

For an unpowered aircraft, the maximum flight time is limited by factors such as weather conditions and pilot endurance. Many aircraft types are restricted to daylight hours, while balloons are limited by their supply of lifting gas. The range can be seen as the average ground speed multiplied by the maximum time in the air.

The Airbus A350-900ULR is now the longest range airliner.[ citation needed ]

Flight dynamics

Flight dynamics with text.png

Flight dynamics is the science of air vehicle orientation and control in three dimensions. The three critical flight dynamics parameters are the angles of rotation around three axes which pass through the vehicle's center of gravity, known as pitch , roll, and yaw .

Flight dynamics is concerned with the stability and control of an aircraft's rotation about each of these axes.


The empennage of a Boeing 747-200 Aircraft tail.JPG
The empennage of a Boeing 747-200

An aircraft that is unstable tends to diverge from its intended flight path and so is difficult to fly. A very stable aircraft tends to stay on its flight path and is difficult to maneuver. Therefore, it is important for any design to achieve the desired degree of stability. Since the widespread use of digital computers, it is increasingly common for designs to be inherently unstable and rely on computerised control systems to provide artificial stability.

A fixed wing is typically unstable in pitch, roll, and yaw. Pitch and yaw stabilities of conventional fixed wing designs require horizontal and vertical stabilisers, [58] [59] which act similarly to the feathers on an arrow. [60] These stabilizing surfaces allow equilibrium of aerodynamic forces and to stabilise the flight dynamics of pitch and yaw. [58] [59] They are usually mounted on the tail section (empennage), although in the canard layout, the main aft wing replaces the canard foreplane as pitch stabilizer. Tandem wing and tailless aircraft rely on the same general rule to achieve stability, the aft surface being the stabilising one.

A rotary wing is typically unstable in yaw, requiring a vertical stabiliser.

A balloon is typically very stable in pitch and roll due to the way the payload is slung underneath the center of lift.


Flight control surfaces enable the pilot to control an aircraft's flight attitude and are usually part of the wing or mounted on, or integral with, the associated stabilizing surface. Their development was a critical advance in the history of aircraft, which had until that point been uncontrollable in flight.

Aerospace engineers develop control systems for a vehicle's orientation (attitude) about its center of mass. The control systems include actuators, which exert forces in various directions, and generate rotational forces or moments about the aerodynamic center of the aircraft, and thus rotate the aircraft in pitch, roll, or yaw. For example, a pitching moment is a vertical force applied at a distance forward or aft from the aerodynamic center of the aircraft, causing the aircraft to pitch up or down. Control systems are also sometimes used to increase or decrease drag, for example to slow the aircraft to a safe speed for landing.

The two main aerodynamic forces acting on any aircraft are lift supporting it in the air and drag opposing its motion. Control surfaces or other techniques may also be used to affect these forces directly, without inducing any rotation.

Impacts of aircraft use

Aircraft permit long distance, high speed travel and may be a more fuel efficient mode of transportation in some circumstances. Aircraft have environmental and climate impacts beyond fuel efficiency considerations, however. They are also relatively noisy compared to other forms of travel and high altitude aircraft generate contrails, which experimental evidence suggests may alter weather patterns.

Uses for aircraft

Aircraft are produced in several different types optimized for various uses; military aircraft, which includes not just combat types but many types of supporting aircraft, and civil aircraft, which include all non-military types, experimental and model.


Boeing B-17E in flight Color Photographed B-17E in Flight.jpg
Boeing B-17E in flight

A military aircraft is any aircraft that is operated by a legal or insurrectionary armed service of any type. [61] Military aircraft can be either combat or non-combat:

Most military aircraft are powered heavier-than-air types. Other types, such as gliders and balloons, have also been used as military aircraft; for example, balloons were used for observation during the American Civil War and World War I, and military gliders were used during World War II to land troops.


Agusta A109 helicopter of the Swiss air rescue service Pilatus Agusta A109 Flug.jpg
Agusta A109 helicopter of the Swiss air rescue service

Civil aircraft divide into commercial and general types, however there are some overlaps.

Commercial aircraft include types designed for scheduled and charter airline flights, carrying passengers, mail and other cargo. The larger passenger-carrying types are the airliners, the largest of which are wide-body aircraft. Some of the smaller types are also used in general aviation, and some of the larger types are used as VIP aircraft.

General aviation is a catch-all covering other kinds of private (where the pilot is not paid for time or expenses) and commercial use, and involving a wide range of aircraft types such as business jets (bizjets), trainers, homebuilt, gliders, warbirds and hot air balloons to name a few. The vast majority of aircraft today are general aviation types.


An experimental aircraft is one that has not been fully proven in flight, or that carries a Special Airworthiness Certificate, called an Experimental Certificate in United States parlance. This often implies that the aircraft is testing new aerospace technologies, though the term also refers to amateur-built and kit-built aircraft, many of which are based on proven designs.

A model aircraft, weighing six grams MiniCeline ultralight aircraft.jpeg
A model aircraft, weighing six grams


A model aircraft is a small unmanned type made to fly for fun, for static display, for aerodynamic research or for other purposes. A scale model is a replica of some larger design.

See also



Related Research Articles

A vertical take-off and landing (VTOL) aircraft is one that can take off and land vertically without relying on a runway. This classification can include a variety of types of aircraft including helicopters as well as thrust-vectoring fixed-wing aircraft and other hybrid aircraft with powered rotors such as cyclogyros/cyclocopters and gyrodynes.

<span class="mw-page-title-main">Fixed-wing aircraft</span> Heavier-than-air aircraft with fixed wings generating aerodynamic lift

A fixed-wing aircraft is a heavier-than-air flying machine, such as an airplane, which is capable of flight using wings that generate lift caused by the aircraft's forward airspeed and the shape of the wings. Fixed-wing aircraft are distinct from rotary-wing aircraft, and ornithopters. The wings of a fixed-wing aircraft are not necessarily rigid; kites, hang gliders, variable-sweep wing aircraft and airplanes that use wing morphing are all examples of fixed-wing aircraft.

<span class="mw-page-title-main">Military aircraft</span> Aircraft designed or utilized for use in or support of military operations

A military aircraft is any fixed-wing or rotary-wing aircraft that is operated by a legal or insurrectionary military of any type. Military aircraft can be either combat or non-combat:

<span class="mw-page-title-main">Aviation</span> Design, development, production, operation and use of aircraft

Aviation includes the activities surrounding mechanical flight and the aircraft industry. Aircraft includes fixed-wing and rotary-wing types, morphable wings, wing-less lifting bodies, as well as lighter-than-air craft such as hot air balloons and airships.

<span class="mw-page-title-main">Flight</span> Process by which an object moves, through an atmosphere or beyond it

Flight or flying is the process by which an object moves through a space without contacting any planetary surface, either within an atmosphere or through the vacuum of outer space. This can be achieved by generating aerodynamic lift associated with gliding or propulsive thrust, aerostatically using buoyancy, or by ballistic movement.

<span class="mw-page-title-main">Jet aircraft</span> Aircraft class powered by jet propulsion engines

A jet aircraft is an aircraft propelled by jet engines.

<span class="mw-page-title-main">Takeoff</span> Phase of flight in which a vehicle leaves the land or water surface

Takeoff is the phase of flight in which an aerospace vehicle leaves the ground and becomes airborne. For aircraft traveling vertically, this is known as liftoff.

<span class="mw-page-title-main">History of aviation</span> History of the design, development, production, operation, and use of aircraft

The history of aviation extends for more than two thousand years, from the earliest forms of aviation such as kites and attempts at tower jumping to supersonic and hypersonic flight by powered, heavier-than-air jets.

<span class="mw-page-title-main">Air brake (aeronautics)</span> Flight control surface meant to increase drag

In aeronautics, air brakes or speed brakes are a type of flight control surface used on an aircraft to increase the drag on the aircraft. Air brakes differ from spoilers in that air brakes are designed to increase drag while making little change to lift, whereas spoilers reduce the lift-to-drag ratio and require a higher angle of attack to maintain lift, resulting in a higher stall speed.

<span class="mw-page-title-main">Airplane</span> Powered, flying vehicle with wings

An airplane or aeroplane is a fixed-wing aircraft that is propelled forward by thrust from a jet engine, propeller, or rocket engine. Airplanes come in a variety of sizes, shapes, and wing configurations. The broad spectrum of uses for airplanes includes recreation, transportation of goods and people, military, and research. Worldwide, commercial aviation transports more than four billion passengers annually on airliners and transports more than 200 billion tonne-kilometers of cargo annually, which is less than 1% of the world's cargo movement. Most airplanes are flown by a pilot on board the aircraft, but some are designed to be remotely or computer-controlled such as drones.

<span class="mw-page-title-main">Early flying machines</span> Aircraft developed before the modern aeroplane

Early flying machines include all forms of aircraft studied or constructed before the development of the modern aeroplane by 1910. The story of modern flight begins more than a century before the first successful manned aeroplane, and the earliest aircraft thousands of years before.

<span class="mw-page-title-main">Light-sport aircraft</span> Category of lightweight aircraft that are simple to fly

A light-sport aircraft (LSA), or light sport aircraft, is a fairly new category of small, lightweight aircraft that are simple to fly. LSAs tend to be heavier and more sophisticated than ultralight aircraft, but LSA restrictions on weight and performance separates the category from established GA aircraft. There is no standard worldwide description of an LSA.

<span class="mw-page-title-main">Hybrid airship</span> Partially aero-static aircraft

A hybrid airship or plimp is a powered aircraft that obtains some of its lift as a lighter-than-air (LTA) airship and some from aerodynamic lift as a heavier-than-air aerodyne.

<span class="mw-page-title-main">Rotorcraft</span> Heavier-than-air aircraft which generates lift over rotating wings

A rotorcraft or rotary-wing aircraft is a heavier-than-air aircraft with rotary wings or rotor blades, which generate lift by rotating around a vertical mast. Several rotor blades mounted on a single mast are referred to as a rotor. The International Civil Aviation Organization (ICAO) defines a rotorcraft as "supported in flight by the reactions of the air on one or more rotors".

<span class="mw-page-title-main">Propeller (aeronautics)</span> Aircraft propulsion component

An aircraft propeller, also called an airscrew, converts rotary motion from an engine or other power source into a swirling slipstream which pushes the propeller forwards or backwards. It comprises a rotating power-driven hub, to which are attached several radial airfoil-section blades such that the whole assembly rotates about a longitudinal axis. The blade pitch may be fixed, manually variable to a few set positions, or of the automatically variable "constant-speed" type.

<span class="mw-page-title-main">Subsonic aircraft</span> Aircraft with a maximum speed less than the speed of sound

A subsonic aircraft is an aircraft with a maximum speed less than the speed of sound. The term technically describes an aircraft that flies below its critical Mach number, typically around Mach 0.8. All current civil aircraft, including airliners, helicopters, future passenger drones, personal air vehicles and airships, as well as many military types, are subsonic.

<span class="mw-page-title-main">Glider (aircraft)</span> Aircraft designed for operation without an engine

A glider is a fixed-wing aircraft that is supported in flight by the dynamic reaction of the air against its lifting surfaces, and whose free flight does not depend on an engine. Most gliders do not have an engine, although motor-gliders have small engines for extending their flight when necessary by sustaining the altitude with some being powerful enough to take off by self-launch.

<span class="mw-page-title-main">Tailless aircraft</span> Aircraft whose only horizontal aerodynamic surface is its main wing

In aeronautics, a tailless aircraft is an aircraft with no other horizontal aerodynamic surface besides its main wing. It may still have a fuselage, vertical tail fin, and/or vertical rudder.

The period between 1945 and 1979 is sometimes called the post-war era or the period of the post-war political consensus. During this period, aviation was dominated by the arrival of the Jet Age. In civil aviation the jet engine allowed a huge expansion of commercial air travel, while in military aviation it led to the widespread introduction of supersonic aircraft.


  1. "Aircraft — Define Aircraft at". Archived from the original on 28 March 2015. Retrieved 1 April 2015.
  2. "Different Kinds & Types of Aircraft". Archived from the original on 21 November 2016.
  3. US patent 467069 Archived 23 February 2014 at the Wayback Machine "Air-ship" referring to a compound aerostat/rotorcraft.
  4. Ezekiel Airship (1902) Archived 3 December 2013 at the Wayback Machine Archived 22 February 2014 at the Wayback Machine "airship," – referring to an HTA aeroplane.
  5. The Bridgeport Herald, August 18, 1901 Archived 3 August 2013 at the Wayback Machine – "air ship" referring to Whitehead's aeroplane.
  6. Cooley Airship of 1910, also called the Cooley monoplane. "Unbelievable Flying Objects". Archived from the original on 2 November 2013. Retrieved 10 February 2014. "Round Aircraft Designs". Archived from the original on 2 April 2012. Retrieved 7 September 2011. – a heavier-than-air monoplane.
  7. Frater, A.; The Balloon Factory, Picador (2009), p. 163. Wright brothers' "airship."
  8. George Griffith, The angel of the Revolution, 1893 Archived 22 February 2014 at the Wayback Machine  — "air-ship," "vessel" referring to a VTOL compound rotorcraft (not clear from the reference if it might be an aerostat hybrid.)
  9. Auckland Star, 24 February 1919 Archived 24 March 2014 at the Wayback Machine "Ships of the air," "Air yachts" – passenger landplanes large and small
  10. The Sydney Morning Herald, Monday 11 April 1938 – "ship of the airs," "flying-ship," referring to a large flying-boat.
  11. Smithsonian, America by air Archived 18 January 2014 at the Wayback Machine "Ships of the Air" referring to Pan Am's Boeing Clipper flying-boat fleet.
  12. Michael Halloran and Sean O'Meara, Wing in Ground Effect Craft Review, DSTO, Australia "Archived copy" (PDF). Archived from the original (PDF) on 22 May 2013. Retrieved 24 August 2012.{{cite web}}: CS1 maint: archived copy as title (link), p51. Notes an agreement between ICAO and IMO that WIGs come under the jurisdiction of the International Maritime Organisation although there an exception for craft with a sustained use out of ground effect (OGE) to be considered as aircraft.
  13. "World's largest aircraft the Airlander makes maiden flight in UK," Archived 22 November 2016 at the Wayback Machine 16 August 2016, London 'Daily Telegraph' via Retrieved 22 November 2016.
  14. "Airlander 10, the world's largest aircraft, takes off for the first time," 19 August 2016, CBS News (TV) retrieved 22 November 2016.
  15. Kottasova, Ivana "The world's largest aircraft crashes after 2nd test flight" Archived 22 November 2016 at the Wayback Machine , 24 August 2016, CNN Tech on CNN, the Cable News Network. Retrieved 22 November 2016.
  16. July, Dyre. "Fly Drive Aanbiedingen". Archived from the original on 4 November 2016.
  17. "Watch the world's biggest plane land in Australia," Archived 22 November 2016 at the Wayback Machine 16 May 2016, Fox News. Retrieved 22 November 2016.
  18. Rumbaugh, Andrea, "World's biggest airplane lands at Bush airport," Archived 23 November 2016 at the Wayback Machine Updated 18 November 2016, Houston Chronicle / Retrieved 22 November 2016.
  19. Lewis, Danny, "The World's Largest Aircraft Might Lose its Title to a Blimp,", 18 September 2015, Smart News,, Smithsonian Institution, Washington, D.C.. Retrieved 22 November 2016.
  20. 1 2 3 4 "Ask Us – Largest Plane in the World," Retrieved 22 November 2016.
  21. "World's Second Largest Aircraft," Archived 22 November 2016 at the Wayback Machine 28 July 2013, NASA. Retrieved 22 November 2016.
  22. 1 2 Loftin, Laurence K., Jr., "Wide-Body Transports" Archived 7 June 2013 at the Wayback Machine , in Chapter 13, "Jet Transports," in Part II, "The Jet Age," in Quest for Performance: The Evolution of Modern Aircraft, NASA SP-468, 1985, Scientific and Technical Information Branch, NASA, Washington, D.C., Updated: 6 August 2004. Retrieved 22 November 2016.
  23. "Airbus reviews A380 schedule," Archived 2 February 2017 at the Wayback Machine 29 April 2008, The New York Times . Retrieved 22 November 2016.
  24. "Hypersonic X-43A Takes Flight.htm," Archived 2 November 2016 at the Wayback Machine NASA retrieved November 2016.
  25. "Fastest aircraft, air-breathing engine," Archived 20 December 2016 at the Wayback Machine Guinness World Records. Retrieved 2 December 2016.
  26. 1 2 3 4 5 6 Jackson, Doug, "Ask Us – Aircraft Speed Records," 22 April 2001, Retrieved 22 November 2016.
  27. "Fastest speed in a non-spacecraft aircraft," Archived 20 December 2016 at the Wayback Machine Guinness World Records. Retrieved 2 December 2016.
  28. 1 2 3 4 Bergqvist, Pia, "Fastest Airplanes: Top Performers in Their Class," Archived 3 September 2017 at the Wayback Machine 17 September 2014, Flying . Retrieved 3 December 2016
  29. Benson, Tom, ed., "Speed Regimes: Hypersonic Re-Entry," Archived 23 November 2016 at the Wayback Machine Glenn Research Center, NASA. Retrieved 22 November 2016.
  30. "NASA Armstrong Fact Sheet: SR-71 Blackbird" Archived 23 November 2016 at the Wayback Machine NASA. Retrieved 22 November 2016
  31. "Lockheed SR-71A," Archived 20 December 2016 at the Wayback Machine display notes, 29 May 2015, National Museum of the United States Air Force retrieved 2 December 2016
  32. Trujillo, Staff Sgt. Robert M.,"SR-71 Blackbird: Gone but not forgotten," Archived 20 December 2016 at the Wayback Machine 26 January 2016, 9th Reconnaissance Wing Public Affairs, U.S. Air Force. Retrieved 2 December 2016
  33. "Absolute speed record still stands 40 years later," 27 July 2016 General Aviation News. Retrieved 22 November 2016.
  34. Woolen, Angela, "SR-71 pilots, crew relive absolute speed record," Archived 20 December 2016 at the Wayback Machine 9 August 2016, 78th Air Base Wing Public Affairs, United States Air Force. Retrieved 2 December 2016
  35. Bender, Jeremy and Amanda Macias, "The 9 fastest piloted planes in the world," Archived 20 December 2016 at the Wayback Machine 18 September 2015, Business Insider. Retrieved 3 December 2016
  36. "Fast and furious — the world's fastest military aircraft," Archived 20 December 2016 at the Wayback Machine Airforce Technology. Retrieved 3 December 2016
  37. The Five Fastest Military Jets Ever Made"," Archived 6 August 2016 at the Wayback Machine 2016, Bloomberg. Retrieved 3 December 2016
  38. 1 2 "Ask Us – Fastest Airliner and Area Rule," Retrieved 22 November 2016.
  39. 1 2 "Fastest aircraft, airliner," Archived 20 December 2016 at the Wayback Machine Guinness World Records. Retrieved 2 December. 2016.
  40. Whitfield, Bethany, "Cessna Citation Ten Chases Mach 0.935 Top Speed: Jet would retake speed prize from G650," Archived 20 July 2016 at the Wayback Machine 28 August 2012, Flying . Retrieved 22 November 2016.
  41. "Cessna rolls out first production unit of new Citation X," Archived 22 November 2016 at the Wayback Machine 15 April 2013, Wichita Business Journal. Retrieved 22 November 2016.
  42. "Guided Tours of the BGA". Archived from the original on 25 March 2015. Retrieved 1 April 2015.
  43. "ch10-3". Archived from the original on 14 September 2010. Retrieved 26 March 2010.
  44. 1 2 3 4 5 Gove, P.B., editor: Webster's Third New International Dictionary of the English Language, Unabridged, 1993, Merriam-Webster, Springfield, Mass., USA
  45. 1 2 3 4 5 Crane, D., editor: Dictionary of Aeronautical Terms, Third Edition, ASA (Aviation Supplies & Academics), Newcastle, Washington, USA
  46. 2012 Federal Aviation Regulations for Aviation Maintenance Technicians, 2012, Federal Aviation Administration, U.S. Department of Transportation
  47. 1 2 3 Gunston, Bill, editor: Jane's Aerospace Dictionary 1980, Jane's, London / New York / Sydney
  48. 1 2 "Glossary" in Pilot's Handbook of Aeronautical Knowledge (PHAK), Federal Aviation Administration, Washington, D.C., retrieved September 12, 2022
  49. 1 2 Wragg, David W. editor: A Dictionary of Aviation, 1974, Frederick Fell, New York
  50. "World's First Plane – Designed & Powered By Hemp – Is 10 Times Stronger Than Steel". 8 February 2021.
  51. "Internal Combustion Engine," Glenn Research Center, National Aeronautics and Space Administration (NASA), retrieved September 12, 2022
  52. "Engines," Glenn Research Center, National Aeronautics and Space Administration (NASA), retrieved September 12, 2022
  53. Bryan, C.D.B.: The National Air and Space Museum, 1979 / 1984, Abrams, New York
  54. Taylor, Michael J.H., editor: Jane's Encyclopedia of Aviation, 1989 ed., Portland House / Random House, New York
  55. "Electrified Aircraft Propulsion" (EAP), Glenn Research Center, National Aeronautics and Space Administration (NASA), retrieved September 12, 2022
  56. "eCFR — Code of Federal Regulations". Archived from the original on 2 April 2012. Retrieved 1 April 2015.
  57. (PDF). 1 June 2010 Archived from the original (PDF) on 1 June 2010.{{cite web}}: Missing or empty |title= (help)
  58. 1 2 Crane, Dale: Dictionary of Aeronautical Terms, third edition, p. 194. Aviation Supplies & Academics, 1997. ISBN   1-56027-287-2
  59. 1 2 Aviation Publishers Co. Limited, From the Ground Up, p. 10 (27th revised edition) ISBN   0-9690054-9-0
  60. "Airline Handbook Chapter 5: How Aircraft Fly". Airline Handbook. Air Transport Association. Archived from the original on 20 June 2010.
  61. 1 2 Gunston 1986, p. 274