An-2 | |
---|---|
General information | |
Type | Agricultural, utility aircraft and military transport aircraft |
Manufacturer | Antonov |
Designer | |
Status | Series production may still continue in China as the Shijiazhuang Y-5; [1] engine refitting project began in 2013 [2] |
Primary users | Soviet Union (historical) |
Number built | 18,000+ [3] |
History | |
Manufactured | 1947–2001 |
First flight | 31 August 1947 [4] |
Variants | Antonov An-3 |
The Antonov An-2 (USAF/DoD reporting name Type 22, [5] NATO reporting name Colt [6] ) is a Soviet mass-produced single-engine biplane utility/agricultural aircraft designed and manufactured by the Antonov Design Bureau beginning in 1947. [3] Its durability, high lifting power, and ability to take off and land from poor runways have given it a long service life. The An-2 was produced up to 2001 and remains in service with military and civilian operators around the world.
The An-2 was designed as a utility aircraft for use in forestry and agriculture, but the basic airframe is highly adaptable and numerous variants of the type have been developed; these include hopper-equipped versions for crop-dusting, scientific versions for atmospheric sampling, water-bombers for fighting forest-fires, flying ambulances, float-equipped seaplane versions and lightly armed combat versions for dropping paratroops. [7]
The most common version is the An-2T 12-seater passenger aircraft. All versions (other than the An-3 and the An-2-100) are powered by a 750 kW (1,010 hp) nine-cylinder Shvetsov ASh-62 radial engine, which was developed from the Wright R-1820. [3] The An-2 typically consumes 2.5 L/min (0.66 US gal/min; 0.55 imp gal/min). [8]
The Antonov An-2 was designed to meet a 1940s Soviet Ministry of Forestry requirement for a replacement for the much lighter, largely wooden-airframed Polikarpov Po-2, which was used in large numbers in both agricultural and utility roles. Antonov designed a large single bay biplane of all-metal construction, with an enclosed cockpit and a cabin with seats for twelve passengers. The first prototype, designated SKh-1 and powered by a Shvetsov ASh-21 radial engine, flew on 31 August 1947. The second prototype was fitted with a more powerful Shvetsov ASh-62 engine, which allowed the aircraft's payload to be significantly increased from 1,300 to 2,140 kg (2,870 to 4,720 lb), and in this form it was ordered into production. [9]
Initial Soviet production was at State Factory 473 in Kiev, Ukrainian SSR, where the bulk of up to 5,000 units had been produced by 1960. Later Soviet production (after 1965, of model An-2M especially) was at State Factory 464 at Dolgoprudniy, Russian SFSR. After 1960, most An-2s were constructed at Poland's WSK factory in Mielec; it is believed that over 13,000 aircraft were built in Poland before principal manufacturing activity ended during 1991. [10]
Up until 2001, limited production was undertaken using remaining stocks of components, spares and maintenance coverage, such as a small batch of four aircraft that were produced for Vietnam. [10] China also builds the An-2 under licence as the Shijiazhuang Y-5. [3] It has been occasionally and erroneously reported that there was East German production of the An-2; while An-2s often underwent extensive refurbishment in East German facilities, no new aircraft were constructed there.[ citation needed ]
The An-2 is commonly used as a light utility transport, parachute drop aircraft, agricultural work and other tasks suited to a large slow biplane. Its slow flight and good short field performance make it suited for short, unimproved fields, and some specialized variants have also been built for cold weather and other extreme environments. The Guinness Book of World Records states that the 45-year production run for the An-2 was for a time the longest ever for any aircraft and challenged the well over two decades-long run of the much lighter, late-1920s origin Polikarpov Po-2 biplane it was intended to replace. The An-2's record was exceeded by the four-turboprop, 1954-origin, Lockheed C-130 Hercules military transport. [3]
During the early 1980s, Antonov experimented with a development of the An-2 powered by a modern turboprop engine. The unit used was a 1,080-kilowatt (1,450 hp) Glushenkov engine. Aircraft fitted with this engine had a longer, more streamlined nose to accommodate it. It received the designation of Antonov An-3. [3]
During 2013, Antonov announced that it had successfully flown for the first time a new version of the An-2, dubbed the An-2-100, which was fitted with a three-blade reversible propeller and a 1,100-kilowatt (1,500 shp) Motor Sich MS-14 turboprop running on kerosene rather than Avgas, which is no longer produced in CIS countries. [11] That same year, the company stated that it had received orders for upgrading "hundreds" of the An-2 planes still in operation in Azerbaijan, Cuba and Russia to the An-2-100 upgrade version. [2]
The Siberian Research Institute of Aviation (SIBNIA) has test flown a highly modified An-2 with carbon fibre winglet-like braces and carbon fibre wing structures. It was equipped with a five-bladed turboprop engine, most probably the Honeywell TPE331 already installed on a modernized version of the An-2 that entered service in 2014. According to Russian aviation company Sukhoi, this aircraft was built to demonstrate the aerodynamic and structural changes that were planned for an eventual An-2 replacement announced on 10 June 2015. The autoclave-cured carbonfibre composite materials – including wing panels, spars and ribs – were produced by the Novosibirsk Aviation Plant. Sukhoi says the design change improved the speed of the An-2 by 50%, and testing also has shown the minimum flying speed of the aircraft is "close to zero". [12]
The Antonov An-2 is a mass-produced single-engine biplane that has been commonly used as a utility and agricultural aircraft. It is deliberately furnished with a minimum of complex systems. The crucial wing leading edge slats that give the aircraft its slow flight ability are fully automatic, being held closed by the airflow over the wings. Once the airspeed drops below 64 km/h (40 mph), the slats will extend because they are on elastic rubber springs. [3] Under typical conditions, the take-off is complete within 170 m (560 ft) while the landing run requires 215 m (705 ft); these figures will vary dependent upon various factors, such as the aircraft's take-off/landing weight, the external air temperature, surface roughness, and headwind. [3]
The An-2 is equipped with various design features which make it suitable for operation in remote areas with unsurfaced airstrips. It is fitted with a pneumatic brake system (similar to those used on heavy road vehicles) to stop on short runways, along with an air line attached to the compressor, so the pressure in the tires and shock absorbers can be adjusted without the need for installing specialised equipment. [3] The batteries, while sizable, are relatively easy to remove, so the aircraft does not need a ground power unit to supply power for starting the engine. Likewise, there is no need for an external fuel pump to refuel the aircraft as it is provided with an inbuilt onboard pump, which allows the tanks to be filled from simple fuel drums. [3]
According to the operating handbook, the An-2 has no stall speed. A note from the pilot's handbook reads: "If the engine quits in instrument conditions or at night, the pilot should pull the control column full aft and keep the wings level. The leading-edge slats will snap out at about 64 km/h (40 mph) and when the airplane slows to a forward speed of about 40 km/h (25 mph), the airplane will sink at about a parachute descent rate until the aircraft hits the ground." [3]
As such, pilots of the An-2 have stated that they are capable of flying the aircraft in full control at 48 km/h (30 mph) (as a contrast, a Cessna four-seater light aircraft has a stall speed of around 80 km/h (50 mph)).[ citation needed ] This slow stall speed makes it possible for the aircraft to fly backwards relative to the ground: if the aircraft is pointed into a headwind of roughly 56 km/h (35 mph), it will travel backwards at 8 km/h (5 mph) whilst under full control. [3]
The An-2's ability, looks and flying characteristics, and its status as one of the world's biggest single-engined production biplanes, mean that demand for the An-2 is increasing in Western Europe and the United States, where they are prized by collectors of classic aircraft, making it an increasingly common sight at airshows. Many western countries prohibit the use of the An-2 commercially because the aircraft has not been certified by the relevant national aviation authorities. These restrictions vary by country, but all prevent the An-2 being used for any 'for profit' purpose, with the exception of the United States, where An-2s imported since 1993 are limited to experimental certification, [7] but PZL-built An-2s are exempt from this restriction due to a bilateral agreement with Poland. [3]
The An-2 was adopted in bulk by both the Soviet Air Force and other Eastern Bloc military forces. It was first used in a military context during the Korean War of the early 1950s.[ citation needed ]
The Vietnam People's Air Force (VPAF) was another prolific user of the AN-2; during the Vietnam War, the service occasionally used the type as an attack aircraft. During the 1960s, a single An-2 that was attempting to engage South Vietnamese naval units was shot down by a United States Air Force McDonnell Douglas F-4 Phantom II fighter, under the control of an Air Intercept Controller on the USS Long Beach. [3]
On 12 January 1968, a clandestine TACAN site (call sign: Lima Site 85 /Phou Pha Ti) installed by the United States Air Force in Northern Laos for directing USAF warplanes flying from Thailand to Vietnam was attacked by three North Vietnamese An-2s. A pair of An-2s fired on the outpost using a mixture of machine guns and rockets while a third An-2 orbited overhead to survey the assault. [14]
An Air America Bell UH-1B, XW-PHF that had been resupplying the site gave chase to the two attacking aircraft. Using an AK-47, the American crew (Ted Moore Captain, Glen Wood Kicker) succeeded in shooting down one of the An-2s while the second aircraft was forced down by combined ground and air fire, eventually crashing into a mountain. The surviving Antonov returned to its home base, Gia Lam, near Hanoi. [14]
During the Croatian War of Independence in 1991, a number of aged An-2 biplanes previously used for crop-spraying were converted by the Croatian Air Force to drop makeshift barrel bombs. They were also used to conduct supply missions to the town of Vukovar and other besieged parts of Croatia. [15]
The chief advantage for the An-2 was that they could take off and land in small or improvised airstrips. They were also frequently used to drop supplies by parachute on isolated garrisons. At least one AN-2 was shot down on 2 December 1991 over Vinkovci, eastern Slavonia, by a Serbian surface to air missile (SAM) emplacement which purportedly launched a salvo of SA-6s at the aircraft. [16] [17]
Reportedly, North Korea has operated a number of the AN-2s. The Korean People's Army Special Operation Force is known to use the An-2 to facilitate the infiltration of paratroopers. [18] It has been speculated that in wartime, these aircraft could possibly be used to deliver troops behind enemy lines for sabotage operations. [3]
During the 2020 Nagorno-Karabakh war Azerbaijan Forces operated unmanned AN-2 for surveillance and bombing of Armenian defenses, [19] [20] [21] however the type of the drone was unknown as of October 2020. [22] Armenian forces revealed footage of the alleged shootdown of an Azerbaijani An-2, according to video evidence at least 11 An-2 have been destroyed, with 10 confirmed as shot down and one crashing after takeoff. [23] [24]
On March 2, 2022, Russian An-2s were observed being stationed at Seshcha Air Base, Bryansk Oblast. As the base is situated close to the border with Ukraine, it was speculated that the aircraft are to be used as part of the 2022 Russian invasion of Ukraine. [25]
Over the years, dozens of nations and companies alike have employed the An-2 in civil roles. The type was heavily used throughout the Soviet Union and the Eastern Bloc nations; in particular, Russian airline Aeroflot has operated a large number of the An-2s. During the Soviet era, the An-2 was used as a short-range airliner in Estonia, performing regular flights between the towns of Kuressaare and Kärdla, which reside on separate islands, Saaremaa and Hiiumaa.[ citation needed ]
Since the collapse of the Soviet Union and the various communist states of Eastern Europe, most airlines in these regions have been withdrawing their An-2s from service. This is due to some of these aircraft being over 40 years old, as well as a result of the decline in the production of avgas to fuel the type. [7] Private operators are typically still using the An-2s, as their stability, capacity and slow-flying ability has made them relatively popular for some functions, such as for skydiving. [3] [7]
Whilst their relatively high noise levels, increasing maintenance costs, high fuel consumption [7] and unsophisticated nature (the pre-flight checks alone take between 30 and 40 minutes) has rendered them obsolete for the majority of commercial routes in Europe, the large number of aircraft available means that unit prices are especially low in comparison to contemporaries (being available from as little as US$30,000 for a serviceable example). The price factor has made them highly attractive for continued use in the developing world, where their ability to carry large loads into short airstrips makes them assets to airlines on a budget. Many ex-Aeroflot An-2s have since found work with regional operators across Africa, Central and South America, Cuba and southeast Asia. [3]
As of 2015, there were thousands of An-2s remaining in operation around the world, including over 1,500 in Russia, 294 in Kazakhstan and 54 in Ukraine. [2]
In September of 2024, Vladimir Putin ordered the single-engine UZGA LMS-901 Baikal aircraft into serial production as the An-2’s intended replacement. [26] However, certification of that aircraft's Klimov VK-800SM engine is not expected until 2025, with engine deliveries not starting until 2026. [26]
The aircraft is popular with air charter companies and small airlines, and is operated by private individuals and companies.
As of 8 January 2023 there have been 802 An-2 hull-loss accidents, claiming a total of 825 lives. [58] One of the most recent accidents occurred around 13:30 on 14 November 2022 in the Everglades, when an An-2, which had been seized by U.S. Customs and Border Protection was being transported to Fort Lauderdale Executive Airport and overturned during a forced landing caused by an engine failure. Both pilots survived.
The first known post-WWII act of suicide by pilot was with an An-2. Timofei Shovkunov stole an An-2 and flew it directly into his apartment building in Voroshilovgrad (now Luhansk) on March 27, 1972, apparently despondent after his wife having left along with his son the day before. He was the lone casualty. [59]
In the third known post-WWII act of suicide by pilot, on September 26, 1976, Russian national Vladimir Serkov made an unauthorized takeoff with an An-2 (Reg # USSR-79868) from Novosibirsk-Severny Airport. He crashed it into the stairwell of an apartment complex at Stepnaya st., house 43 / 1, where his ex-wife's parents lived, in an attempt to kill his ex-wife. After completing two laps around the scene, Serkov attempted to pilot the plane to the parents' apartment where his wife and two-year-old son were visiting. The aircraft pierced the stairwell between the 3rd and 4th floors, and being fueled with 800 liters of gasoline, ignited a large fire inside the stairwell that ultimately spread to damage 30 total apartments. Firefighters were on scene in five minutes, taking 57 minutes to extinguish the blaze. A four-year-old and two six-year-old children were killed at the scene from burns. Another four-year-old child died eight days later as a result of burns. In total, 11 residents were injured as a result of fire burns. [60] [61] Serkov's ex-wife (and her parents) and his toddler son were not injured in the incident. [60] [61]
Data from Biplanes, Triplanes, and Seaplanes [4]
General characteristics
Performance
Related development
Aircraft of comparable role, configuration, and era
The Ilyushin Il-18 is a large turboprop airliner that first flew in 1957 and became one of the best known Soviet aircraft of its era. The Il-18 was one of the world's principal airliners for several decades and was widely exported. Due to the aircraft's durability, many examples achieved over 45,000 flight hours and the type remains operational in both military and civilian capacities. The Il-18's successor was the longer-range Ilyushin Il-62.
PZL was the largest Polish aerospace manufacturer of the interwar period, and a brand of their aircraft. Based in Warsaw between 1928 and 1939, PZL introduced a variety of well-regarded aircraft, most notably the PZL P.11 fighter, the PZL.23 Karaś light bomber, and the PZL.37 Łoś medium bomber.
The Mikoyan-Gurevich MiG-9 was the first turbojet fighter developed by Mikoyan-Gurevich in the years immediately after World War II. It used reverse-engineered German BMW 003 engines. Categorized as a first-generation jet fighter, it suffered from persistent problems with engine flameouts when firing its guns at high altitudes due to gun gas ingestion. Multiple different armament configurations were tested, but none solved the problem. Several different engines were evaluated, but none were flown, as the prototype of the MiG-15 promised superior performance.
The Antonov An-22 "Antei" is a heavy military transport aircraft designed by the Antonov Design Bureau in the Soviet Union. Powered by four turboprop engines, each driving a pair of contra-rotating propellers, the design was the first wide-body transport aircraft and remains the world's largest turboprop-powered aircraft to date. The An-22 first appeared publicly outside the Soviet Union at the 1965 Paris Air Show. Thereafter, the model saw extensive use in major military and humanitarian airlifts for the Soviet Union, and is still in service with the Russian Aerospace Forces.
The Antonov An-24 is a 44-seat twin turboprop transport/passenger aircraft designed in 1957 in the Soviet Union by the Antonov Design Bureau and manufactured by Kyiv, Irkutsk and Ulan-Ude Aviation Factories.
The Antonov An-8 is a Soviet-designed twin-turboprop, high-wing light military transport aircraft.
The Antonov An-10 Ukraina is a four-engined turboprop passenger transport aircraft designed in the Soviet Union.
The Antonov An-12 is a four-engined turboprop transport aircraft designed in the Soviet Union. It is the military version of the Antonov An-10 and has many variants. For more than three decades the An-12 was the standard medium-range cargo and paratroop transport aircraft of the Soviet air forces. A total of 1,248 aircraft were built.
The Antonov An-28 is a twin-engined light turboprop transport aircraft, developed from the Antonov An-14M. It was the winner of a competition against the Beriev Be-30, for use by Aeroflot as a short-range airliner. It first flew in 1969. A total of 191 were built and 16 remain in airline service as at August 2015. After a short pre-production series built by Antonov, it was licence-built in Poland by PZL-Mielec. In 1993, PZL-Mielec developed its own improved variant, the PZL M28 Skytruck.
The Antonov An-30, is a development of the An-24 designed for aerial cartography.
The LWD/WSK Junak was a Polish trainer aircraft, used from 1952 to 1961 by the Polish Air Force and until 1972 by Polish civilian operators. It was designed by the LWD bureau and produced by the WSK Warszawa-Okęcie factory.
PZL Mielec, formerly WSK-Mielec and WSK "PZL-Mielec" is a Polish aerospace manufacturer based in Mielec. It is the largest aerospace manufacturer in postwar Poland. In 2007, it was acquired by Sikorsky Aircraft Corporation, which retained the brand name. Between 1948 and 2014, the company manufactured approximately 15,600 aircraft.
The PZL M-15 was a jet-powered sesquiplane designed and manufactured by the Polish aircraft company WSK PZL-Mielec for agricultural aviation. In reference to both its strange looks and relatively loud jet engine, the aircraft was nicknamed Belphegor, after the noisy demon.
The Mil Mi-2 is a small, three rotor blade Soviet-designed multi-purpose helicopter developed by the Mil Moscow Helicopter Plant, designed in the early 1960s and produced exclusively by WSK "PZL-Świdnik" in Poland. Nearly 5500 were made by the time production stopped in 1999, and it remains in service globally.
The Antonov An-3 is a Soviet civil multipurpose and agricultural aircraft. It is essentially a turboprop-powered development of the An-2, designed to upgrade or replace it. The basic transport version (An-3T) is supplemented by a cargo/passenger version (An-3TK), an agricultural version (An-3SH), a forest fire-fighting version (An-3P), as well as an ambulance version. It is designed to carry passengers and cargo, operating from paved or unpaved airfields, including snow covered surfaces up to 35 cm (14 in) deep.
The Polikarpov Po-2 was an all-weather multirole Soviet biplane, nicknamed Kukuruznik. The reliable, uncomplicated design of the Po-2 made it an ideal trainer aircraft, as well as doubling as a low-cost ground attack, aerial reconnaissance, psychological warfare and liaison aircraft during war, proving to be one of the most versatile light combat types to be built in the Soviet Union. As of 1978 it remained in production for a longer period of time than any other Soviet-era aircraft.
The Mil Mi-1 was a Soviet three- or four-seat light utility helicopter. It was the first Soviet helicopter to enter serial production. It is powered by one 575 hp (429 kW) Ivchenko AI-26V radial piston engine. It entered service in 1950 and was first seen on the 1951 Soviet Aviation Day, Tushino and was produced for 16 years. More than 1,000 were built in the USSR and 1,594 in Poland, as SM-1.
The Yakovlev Yak-2 was a short-range Soviet light bomber/reconnaissance aircraft used during World War II. It was produced in small numbers, and most of them were destroyed during the opening stages of Operation Barbarossa.
The Antonov An-14 Pchelka or Pchyolka, Bdzhilka is a Soviet utility aircraft which was first flown on 15 March 1958. It was a twin-engined light STOL utility transport, with two 300 hp Ivchenko AI-14RF radial piston engines. Serial production started in 1966, and about 300 examples were built by the time production ended in 1972. The An-14 failed to replace the more successful An-2 biplane, which was manufactured until 1990; the An-2 is still manufactured on special order. The An-14's successor, the An-28 with turboprop engines, is still manufactured at PZL Mielec factories in Poland, under the names PZL M28 Skytruck and PZL M28B Bryza.
The Shvetsov ASh-62 is a nine-cylinder, air-cooled, radial aircraft engine produced in the Soviet Union. A version of this engine is produced in Poland as the ASz-62 and the People's Republic of China as the HS-5.
{{cite book}}
: CS1 maint: multiple names: authors list (link)