Drop tankIn aviation, a drop tank (external tank, wing tank or belly tank) is used to describe auxiliary fuel tanks externally carried by aircraft. A drop tank is expendable and often capable of being jettisoned. External tanks are commonplace on modern military aircraft and occasionally found in civilian ones, although the latter are less likely to be discarded except in an emergency. The primary disadvantage with drop tanks is that they impose a drag penalty on the aircraft.
Air combat manoeuvringAir combat manoeuvring (ACM) is the tactical art of moving, turning, and situating one's fighter aircraft in order to attain a position from which an attack can be made on another aircraft. Commonly associated with dogfighting, air combat manoeuvres rely on offensive and defensive basic fighter manoeuvring (BFM) to gain an advantage over an aerial opponent. Military aviation originated in World War I when aircraft were initially used to spot enemy troop concentrations, field gun positions, and movements.
Active electronically scanned arrayAn active electronically scanned array (AESA) is a type of phased array antenna, which is a computer-controlled array antenna in which the beam of radio waves can be electronically steered to point in different directions without moving the antenna. In the AESA, each antenna element is connected to a small solid-state transmit/receive module (TRM) under the control of a computer, which performs the functions of a transmitter and/or receiver for the antenna.
TriplaneA triplane is a fixed-wing aircraft equipped with three vertically stacked wing planes. Tailplanes and canard foreplanes are not normally included in this count, although they occasionally are. The triplane arrangement may be compared with the biplane in a number of ways. A triplane arrangement has a narrower wing chord than a biplane of similar span and area. This gives each wing-plane a slender appearance with higher aspect ratio, making it more efficient and giving increased lift.
Flying aceA flying ace, fighter ace or air ace is a military aviator credited with shooting down five or more enemy aircraft during aerial combat. The exact number of aerial victories required to officially qualify as an ace is varied, but is usually considered to be five or more. The concept of the "ace" emerged in 1915 during World War I, at the same time as aerial dogfighting. It was a propaganda term intended to provide the home front with a cult of the hero in what was otherwise a war of attrition.
Foster mountingThe Foster mounting was a device fitted to some fighter aircraft of the Royal Flying Corps during the First World War. It was designed to enable a machine gun (in practice, a Lewis Gun) to fire over, rather than through the arc of the spinning propeller. It took several forms when applied to different aircraft types, but all shared the feature of a quadrant shaped I-beam rail on which the gun could slide back and down in one movement.
Push-pull configurationAn aircraft constructed with a push-pull configuration has a combination of forward-mounted tractor (pull) propellers, and backward-mounted (pusher) propellers. The earliest known examples of "push-pull" engined-layout aircraft was the Short Tandem Twin An early pre-World War I example of a "push-pull" aircraft was the Caproni Ca.1 of 1914 which had two wing-mounted tractor propellers and one centre-mounted pusher propeller. Around 450 of these and their successor, the Ca.3 were built.
Fokker ScourgeThe Fokker Scourge (Fokker Scare) occurred during the First World War from July 1915 to early 1916. Imperial German Flying Corps (Die Fliegertruppen) units, equipped with Fokker Eindecker (Fokker monoplane) fighters, gained an advantage over the Royal Flying Corps (RFC) and the French Aéronautique Militaire. The Fokker was the first service aircraft to be fitted with a machine gun synchronised to fire through the arc of the propeller without striking the blades.
Nieuport 11The Nieuport 11 (or Nieuport XI C.1 in contemporary sources), nicknamed the Bébé, is a French World War I single seat sesquiplane fighter aircraft, designed by Gustave Delage. It was the primary aircraft that ended the Fokker Scourge in 1916. The type saw service with several of France's allies, and gave rise to the series of "vee-strut" Nieuport fighters that remained in service (latterly as trainers) into the 1920s. The Nieuport 11 is a new much smaller aircraft based on the general configuration of the Nieuport 10, but designed specifically as a single-seat fighter.
Gun harmonisationIn aerial gunnery, gun harmonisation, convergence pattern, convergence zone, convergence point or bore-sight point refers to the aiming of fixed guns or cannon carried in the wings of a fighter aircraft. The wing guns in fighters were typically not bore-sighted to point straight ahead; instead they were aimed slightly inward so that the projectiles met at one or more areas several hundred yards or metres in front of the fighter's nose.
