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A light bomber is a relatively small and fast type of military bomber aircraft that was primarily employed before the 1950s. Such aircraft would typically not carry more than one ton of ordnance.
The earliest light bombers were intended to drop their bombs in level flight over a target. During World War I some air forces began to distinguish [ citation needed ] between light bombers and the earliest purpose-built attack aircraft which carried out ground attack, close air support, anti-shipping and similar missions. After World War I, attack aircraft were typically identifiable by their ability to carry multiple fixed machine guns, automatic cannons and rockets in addition to bombs. Light bombers have often served as attack aircraft and vice versa.
Purpose-built light bombers disappeared from military aviation by the end of World War II, as advancements in propulsion and aeronautical design enabled newer attack/strike aircraft, fighter-bombers, and multirole aircraft types to deliver equal or greater bomb loads while also having superior performance, range and defensive capabilities. Modern aircraft carrying out similar missions include light attack aircraft, strike fighters, and counter-insurgency aircraft.
The first aircraft purposely designed for bombing missions were the Italian Caproni Ca 30 and British Bristol T.B.8, both built in 1913. [1] The T.B.8 was a single engine biplane built by the Bristol Aeroplane Company. It was fitted with a prismatic bombsight in the front cockpit and a cylindrical bomb carrier in the lower forward fuselage capable of carrying 12 x 10 lb (12 x 4.5 kg) bombs, which could be dropped individually or all together. [2] The T.B.8 was purchased for use both by the Royal Naval Air Service (RNAS) and the Royal Flying Corps (RFC).
The Eastbourne RNAS Squadron, operating the T.B.3, carried out the first bombing attack of World War I: on 25 November 1914, under the command of Charles Rumney Samson, the squadron attacked coastal gun batteries operated by German Empire forces, at Middelkerke, Belgium. [3] [4]
Most bombers used on World War I battlefields were in fact light bombers: typically single-engine biplanes with a bomb load of 50–400 kg. Two of the most famous were the Airco DH.4 designed by Geoffrey de Havilland, and the Breguet 14 designed by Louis Breguet. The same type often also served as reconnaissance aircraft; examples include the Albatros C.III, Avro 504, DFW C.V, LVG C.II, Royal Aircraft Factory R.E.8, Rumpler C.I and Voisin III. The Royal Aircraft Factory B.E.2 was even modified as a pioneering night fighter in attempts to shoot down German Zeppelins.
By the early 1930s many air forces were seeking to replace their older biplane aircraft (for example, the RAF's Hawker Hart and VVS's Polikarpov R-5) with more modern and higher performance monoplane designs. Specialised light bomber designs were single-engine or twin-engine aircraft with a bomb load of about 500–1,000 kg. Typical single-engine light bombers of this era included the Fairey Battle, Kawasaki Ki-32 (later known by the Allied reporting name "Mary"), Mitsubishi Ki-30 ("Ann"), Mitsubishi Ki-51 ("Sonia"), PZL.23 Karaś, and Sukhoi Su-2. Contemporaneous twin-engine light bombers included the Bristol Blenheim, Douglas B-23 Dragon, Kawasaki Ki-48 ("Lily"), Martin Maryland (also known as the A-22), Lockheed Hudson, Tupolev SB, and Mitsubishi G3M ("Nell"). While the Mitsubishi G3M was classified by the Imperial Japanese Navy as a medium bomber, it was a land-based day bomber with bomb loads as small as 800 kg (1,800 lb) and had a secondary role as a torpedo bomber. Many of these aircraft were also used in other non-offensive roles, such as reconnaissance and maritime patrol.
A sub-type of light bomber also emerged in the 1930s, the fast bomber (German Schnellbomber), which prioritised speed as a self-defense measure; even the bomb load was minimised towards this design goal. Early examples were the Bristol Blenheim and Dornier Do 17 (both introduced in 1937). A weakness of the fast bomber design concept was that improvements in the speed of bombers were, in most cases, quickly matched in subsequent fighter designs (which would additionally eclipse the load-carrying ability of light bomber aircraft within a few years).
During the early stages of World War II, the above-mentioned designs of the late 1930s often saw considerable action. In some cases, they became the basis of newer, faster light bombers, such as the Martin Baltimore (U.S. designation A-23/A-30 developed from the Maryland), as well as medium bombers with more powerful engines and heavier payloads.
Twin-engine light bombers were successful when converted into airborne radar-equipped night fighters during World War II; examples include the Bristol Blenheim, Douglas A-20 Havoc (as the P-70), and Dornier Do 17. Light bombers were selected as a basis for night fighters during this time because early airborne radar systems, used to find and track targets in the dark, were bulky and often required a dedicated operator in the crew; most smaller day fighters of that era were unsuited to such extra weight and personnel. Conversely, the Petlyakov Pe-3, which had been designed as a night fighter, was often used a light bomber.
Many other aircraft which originally had been designed as fighters or other mission-specific bombers but fit the size, performance and payload requirements for the light bomber role would also be adapted to perform such missions during World War II. Most dive bombers , such as the Junkers Ju 87 Stuka and Vultee Vengeance were light bombers by definition, as these aircraft typically carried bomb loads of one ton or less. Likewise, many torpedo bombers were light bombers according to their size and warload and it was common for these aircraft to also be used for level bombing missions. The Bristol Beaufort, Nakajima B5N and Grumman TBF Avenger, while designed as torpedo bombers, saw some action purely in the light bomber role. Types designed before the war as heavy fighters were also frequently adapted as light bombers, including the Messerschmitt Bf 110, Potez 633, Fokker G.I, Kawasaki Ki-45, Bristol Beaufighter, and Lockheed P-38 Lightning.
Light attack aircraft such as the Breda Ba.65, Ilyushin Il-2 Šturmovík, Northrop A-17, and Vultee V-11 initially differed little in armament and operational role from light bombers. As World War II progressed, specialised attack designs became increasingly focused on low altitude strafing of surface targets, armed with automatic cannons, heavy machine guns and newly-developed rockets; the A-20 and B-25 Mitchell (type-classed as a medium bomber) each had variants with 8 or more forward-firing machine guns for ground strafing missions. Later variants of the Ju 87 Stuka dive bomber were adapted to the role of ground attack against tanks armed with 37 mm cannon, and the Curtiss SB2C Helldiver (a U.S. Navy dive bomber adopted later in World War II when that design role was beginning to disappear) also was assigned to ground attack sorties using its cannon, bombs and rockets.
The light bomber, as a discrete aircraft type, began to be superseded as World War II opened. The growth of engine power from the 1,000 hp to the 2,000 hp class during the war produced single-engine fighters with greater performance, offensive and defensive capabilities than the light bombers of only a few years earlier. This gave rise to the fighter-bomber type, notably the Fw 190 F and G models, Hawker Typhoon and Republic P-47 Thunderbolt. Multirole twin-engine designs capable of hauling bomb loads greater than 2,000 lbs such as the Lockheed P-38 Lightning, Junkers Ju 88 and de Havilland Mosquito also supplanted earlier 1930s-era light bomber designs during the war.
One of the last light bombers to be introduced in World War II, the U.S. Douglas A-26 Invader, replaced the earlier A-20 Havoc type and also was designated by the USAAF as a replacement for its Martin B-26 Marauder (which had the same engines and a similar bomb load as the Invader) medium bomber.
The substantial increases in performance, load-carrying ability, and multirole versatility of new combat aircraft designs (including the advent of jet aircraft) by the end of World War II signaled the end of the dedicated light bomber type. Attack aircraft, strike fighters, counter-insurgency aircraft and combat UAVs are types which today carry out technologically enhanced equivalents of the former light bomber role.
A bomber is a military combat aircraft designed to attack ground and naval targets by dropping air-to-ground weaponry, launching torpedoes, or deploying air-launched cruise missiles. The first use of bombs dropped from an aircraft occurred in the Italo-Turkish War, with the first major deployments coming in the First World War and Second World War by all major airforces causing devastating damage to cities, towns, and rural areas. The first purpose built bombers were the Italian Caproni Ca 30 and British Bristol T.B.8, both of 1913. Some bombers were decorated with nose art or victory markings.
A military aircraft is any fixed-wing or rotary-wing aircraft that is operated by a legal or insurrectionary armed service of any type. Military aircraft can be either combat or non-combat:
The Bristol Blenheim is a British light bomber aircraft designed and built by the Bristol Aeroplane Company (Bristol) which was used extensively in the first two years of the Second World War, with examples still being used as trainers until the end of the war. Development began with the Type 142, a civil airliner, in response to a challenge from Lord Rothermere to produce the fastest commercial aircraft in Europe. The Type 142 first flew in April 1935, and the Air Ministry, impressed by its performance, ordered a modified design as the Type 142M for the Royal Air Force (RAF) as a bomber. Deliveries of the newly named Blenheim to RAF squadrons commenced on 10 March 1937. In service the Type 142M became the Blenheim Mk.I which would be developed into the longer Type 149, designated the Blenheim Mk.IV, except in Canada where Fairchild Canada built the Type 149 under licence as the Bolingbroke. The Type 160 Bisley was also developed from the Blenheim, but was already obsolete when it entered service.
An interceptor aircraft, or simply interceptor, is a type of fighter aircraft designed specifically for the defensive interception role against an attacking enemy aircraft, particularly bombers and reconnaissance aircraft. Aircraft that are capable of being or are employed as both ‘standard’ air superiority fighters and as interceptors are sometimes known as fighter-interceptors. There are two general classes of interceptor: light fighters, designed for high performance over short range; and heavy fighters, which are intended to operate over longer ranges, in contested airspace and adverse meteorological conditions. While the second type was exemplified historically by specialized night fighter and all-weather interceptor designs, the integration of mid-air refueling, satellite navigation, on-board radar and beyond visual range (BVR) missile systems since the 1960s has allowed most frontline fighter designs to fill the roles once reserved for specialised night/all-weather fighters.
A torpedo bomber is a military aircraft designed primarily to attack ships with aerial torpedoes. Torpedo bombers came into existence just before the First World War almost as soon as aircraft were built that were capable of carrying the weight of a torpedo, and remained an important aircraft type until they were rendered obsolete by anti-ship missiles. They were an important element in many famous Second World War battles, notably the British attack at Taranto, the sinking of the German battleship Bismarck, and the Japanese attack on Pearl Harbor.
A night fighter is a fighter aircraft adapted for use at night or in other times of bad visibility. Night fighters began to be used in World War I and included types that were specifically modified to operate at night.
An attack aircraft, strike aircraft, or attack bomber is a tactical military aircraft that has a primary role of carrying out airstrikes with greater precision than bombers, and is prepared to encounter strong low-level air defenses while pressing the attack. This class of aircraft is designed mostly for close air support and naval air-to-surface missions, overlapping the tactical bomber mission. Designs dedicated to non-naval roles are often known as ground-attack aircraft.
A strategic bomber is a medium- to long-range penetration bomber aircraft designed to drop large amounts of air-to-ground weaponry onto a distant target for the purposes of debilitating the enemy's capacity to wage war. Unlike tactical bombers, penetrators, fighter-bombers, and attack aircraft, which are used in air interdiction operations to attack enemy combatants and military equipment, strategic bombers are designed to fly into enemy territory to destroy strategic targets. In addition to strategic bombing, strategic bombers can be used for tactical missions. There are currently only three countries that operate strategic bombers: the United States, Russia and China.
Heavy bombers are bomber aircraft capable of delivering the largest payload of air-to-ground weaponry and longest range of their era. Archetypal heavy bombers have therefore usually been among the largest and most powerful military aircraft at any point in time. In the second half of the 20th century, heavy bombers were largely superseded by strategic bombers, which were often smaller in size, but had much longer ranges and were capable of delivering nuclear bombs.
A medium bomber is a military bomber aircraft designed to operate with medium-sized bombloads over medium range distances; the name serves to distinguish this type from larger heavy bombers and smaller light bombers. Mediums generally carried about two tons of bombs, compared to light bombers that carried one ton, and heavies that carried four or more.
A fighter-bomber is a fighter aircraft that has been modified, or used primarily, as a light bomber or attack aircraft. It differs from bomber and attack aircraft primarily in its origins, as a fighter that has been adapted into other roles, whereas bombers and attack aircraft are developed specifically for bombing and attack roles.
The Bristol Type 163 Buckingham was a British Second World War medium bomber for the Royal Air Force (RAF). Overtaken by events, it was built in small numbers and was used primarily for transport and liaison duties.
The Kawasaki Ki-100 (キ100) is a single-seat single-engine monoplane fighter aircraft used by the Imperial Japanese Army Air Service during World War II. The Japanese Army designation was "Type 5 Fighter". It was not assigned an Allied code name.
The Mitsubishi Ki-67Hiryū was a twin-engine heavy bomber produced by Mitsubishi Aircraft Company and used by the Imperial Japanese Army Air Service and Imperial Japanese Navy Air Service in World War II. Its Army long designation was "Army Type 4 Heavy Bomber" (四式重爆撃機). Japanese Navy variants included the P2M and Q2M.
The escort fighter was a concept for a fighter aircraft designed to escort bombers to and from their targets. An escort fighter needed range long enough to reach the target, loiter over it for the duration of the raid to defend the bombers, and return.
The Mitsubishi Ki-21 was a Japanese heavy bomber during World War II. It began operations during the Second Sino-Japanese War participating in the Nomonhan Incident, and in the first stages of the Pacific War, including the Malayan, Burmese, Dutch East Indies and New Guinea Campaigns. It was also used to attack targets as far-flung as western China, India and northern Australia.
The Nakajima Ki-49Donryu was a twin-engine Japanese World War II heavy bomber. It was designed to carry out daylight bombing missions, without the protection of escort fighters. Consequently, while its official designation, Army Type 100 Heavy Bomber, was accurate in regard to its formidable defensive armament and armor, these features restricted the Ki-49 to payloads comparable to those of lighter medium bombers – the initial production variant could carry only 1,000 kg (2,200 lb) of bombs.
The Kawasaki Ki-48, was a Japanese twin-engine light bomber that was used during World War II. Its Allied reporting name was "Lily".
The Mitsubishi Ki-2 was a light bomber built by Mitsubishi for the Imperial Japanese Army Air Service (IJAAS) in the 1930s. Its Allied nickname was "Louise". Despite its antiquated appearance, the Ki-2 was successfully used in Manchukuo and in North China during the early stages of the Second Sino-Japanese War, in areas where danger from enemy fighter aircraft was minimal. It was later used in a training role.
An emergency fighter is an aircraft designed or adapted for use as a fighter during an emergency period in war. While useful as a broad concept or definition, it is not easy to make the category of emergency fighter clear cut, as many aircraft designs are produced under pressure in wartime, and aircraft which were hastily adapted for use as fighters may then go on to have a mainstream career.