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Soviet/Ukraine four-engine large military transport aircraft
During development it was known as Izdeliye 400 (Product #400) in house, and An-40 in the West. First flown in 1982, civil certification was issued on 30 December 1992. In July 2013, 26 An-124s were in commercial service with 10 on order.
In August 2014, it was reported that plans to resume joint production of the Antonov An-124 had been shelved due to the ongoing political tensions between Russia and Ukraine. The sole remaining production facility is Russia's Aviastar-SP in Ulyanovsk. The various operators of the An-124 are in discussions with respect to the continuing airworthiness certification of the individual An-124 planes. The original designer of the An-124 is responsible for managing the certification process for its own products, but Russian/Ukrainian conflicts are making this process difficult to manage. Military operators are able to self-certify the airworthiness of their own aircraft, but Russian civil operators must find a credible outside authority for certification if Ukraine is unable or unwilling to participate in the process.[unreliable source?]
During the 1970s, the Military Transport Aviation (Komandovaniye voyenno-transportnoy aviatsii or VTA) arm of the Soviet Air Forces had a shortfall in strategic heavy airlift capacity. Its largest planes consisted of about 50 Antonov An-22 turboprops, which were used heavily for tactical roles. A declassified 1975 CIA analysis concluded that the USSR did "...not match the US in ability to provide long-range heavy lift support."
The An-124 was manufactured in parallel by two plants: the Russian company Aviastar-SP (ex. Ulyanovsk Aviation Industrial Complex) and by the Kyiv Aviation Plant AVIANT, in Ukraine. Design work started in 1971 and construction of facilities began in 1973. Manufacturing on the first airframe began in 1979. Ultimately this project brought together over 100 factories contracted to produce systems and parts.
The first flight took place in December 1982 and the first exposure to the West followed in 1985 at the Paris Air Show.
In the early 2000s, Volga-Dnepr upgraded its freighters with engine improvements to meet Chapter 4 noise regulations, structural improvements to increase service life, and avionics and systems changes for four persons operations down from six or seven.
Russia and Ukraine agreed to resume the production in the third quarter of 2008. In May 2008, a new variant--the An-124-150--was announced; it featured several improvements, including a maximum lift capacity of 150 tonnes. However, in May 2009, Antonov's partner, the Russian United Aircraft Corporation announced it did not plan production of An-124s in the period 2009-2012. In late 2009, Russian President Dmitry Medvedev ordered production of the aircraft resumed. It is expected that Russia will purchase 20 new aircraft. In August 2014, Jane's reported that, Russian Deputy Minister of Industry and Trade Yuri Slusar announced that Antonov An-124 production was stopped due to ongoing political tensions between Russia and Ukraine.
In January 2019, Antonov revealed its plans to restart the An-124 production without support from Russia.
Russian replacement design
At MAKS Air Show in 2017, the TsAGI announced its Slon (elephant) design to replace the similar An-124. The design was detailed in January 2019 before Wind tunnel testing scheduled for August-September. It should be produced at the Aviastar-SP factory in Ulyanovsk but would be a difficult investment without substantial foreign orders. It should transport 150 t (330,000 lb) over 3,800 nmi (7,000 km) (up from 1,675 nmi, 3,102 km), or 180 t (400,000 lb) over 2,650 nmi (4,910 km) at 460 kn (850 km/h). The Russian MoD wants a range of 4,100 nmi (7,600 km) with five Sprut-SDM-1 light tanks, their 100 crew and 300 armed soldiers.
It would be larger at 82.3 m (270 ft) long from 69 m (227 ft), with a 87-88 m (286-290 ft) span versus 73.3 m (240.5 ft) and 24.0 m (78.7 ft) high compared with 21.0 m (68.9 ft). A new higher aspect ratio, composite wing and a 214-222 t (472,000-489,000 lb) airframe would allow a 490-500 t (1,080,000-1,100,000 lb) gross weight. It should be powered by Russian PD-35s developed for the CR929 widebody, producing 35 tf (77,000 lbf) up from 23 tf (51,000 lbf). Two fuselages are planned, one for Volga-Dnepr with a width of 5.3 m (17.4 ft) from the An-124's 4.4 m (14.4 ft), and one for the Russian MoD of 6.4 m (21 ft) wide to carry vehicles in two lines.
By November 2019, the TsAGI had shown a 1.63 m (5 ft 4 in) long and 1.75 m (5 ft 9 in) wide model, ahead of windtunnel testing.
An-124-100 kneeling with front ramp down (nose undercarriage retracted)
not kneeling - nose gear extended
Externally, the An-124 is similar to the American Lockheed C-5 Galaxy, having a double fuselage to allow for a rear cargo door (on the lower fuselage) that can open in flight without affecting structural integrity. It is slightly shorter, with a slightly greater wingspan, and a 17% larger payload. Instead of the Galaxy's T-tail, the An-124 uses a conventional empennage, similar in design to that of the Boeing 747. The An-124's main engine is the Lotarev D-18 (238-250 kN).
The aircraft uses oleo strut suspension for its 24 wheels. The suspension has been calibrated to allow landing on rough terrain and is able to kneel to allow easier front loading. The plane has an onboard overhead crane capable of lifting up to 30 tonnes of cargo, and items up to 120 tonnes can be winched on board.
Up to 150 tonnes (150 long tons; 170 short tons) of cargo can be carried in a military An-124; it can also carry 88 passengers in an upper deck behind the wing centre section. The cargo compartment of An-124 is 36×6.4×4.4 m (118×21×14 ft), ca. 20% larger than the main cargo compartment of the C-5 Galaxy, which is 36.91×5.79×4.09 m (121.1×19.0×13.4 ft). Due to limited pressurisation in the main cargo compartment (24.6 kPa, 3.57 psi), it seldom carries paratroopers.
Pilots have stated that the An-124 is light on the controls and easy to handle for an aircraft of its size.
Germany led the recent effort to lease An-124s for NATOstrategic airlift requirements. Two aircraft are leased from SALIS GmbH as a stopgap until the Airbus A400M is available. Under NATO SALIS programme NAMSA is chartering six An-124-100 transport aircraft. According to the contract An-124-100s of Antonov Airlines and Volga-Dnepr are used within the limits of NATO SALIS programme to transport cargo by requests of 18 countries: Belgium, Hungary, Greece, Denmark, Canada, Luxembourg, Netherlands, Norway, United Kingdom, Poland, Portugal, Slovakia, Slovenia, Finland, France, Germany, Czech Republic and Sweden. Two An-124-100s are constantly based on full-time charter in the Leipzig/Halle airport, but the contract specifies that if necessary, two more aircraft will be provided at six days' notice and another two at nine days' notice. The aircraft proved extremely useful for NATO especially with ongoing operations in Iraq and Afghanistan.
United Launch Alliance (ULA) contracts the An-124 to transport the Atlas V launch vehicle from its facilities in Decatur, Alabama to Cape Canaveral. ULA also uses the An-124 to transport the Atlas V launch vehicle and Centaur upper stage from their manufacturing facility in Denver, Colorado to Cape Canaveral and Vandenberg Air Force Base. Two flights are required to transfer each launch vehicle (one for the Atlas V main booster stage and another for the Centaur upper stage). It is also contracted by Space Systems Loral to transport satellites from Palo Alto, CA to the Arianespace spaceport in Kourou, French Guiana and by SpaceX to transport payload fairings between their factory in Hawthorne, California and Cape Canaveral.
Airbus Transport International, a subsidiary of Airbus, has selected a Russian cargo company, Polet Airlines, as "designated carrier" to the company. Polet expects its three An-124-100s will transport astronautic equipment manufactured by EADS, which is Airbus' parent company, and components of the Airbus A380 superjumbo.
As of 2013[update] the An-124 has visited 768 airports in over 100 countries.
An An-124 was used in May 2018 to transport an 87,000 lb die tools from Eaton Rapids, Michigan, USA to Nottingham, England in order to restart Ford F-150 production due to a fire in the Eaton Rapids Magnesium Casting Facility.
Joint proposal with Air Foyle to meet UK's Short Term Strategic Airlifter (STSA) requirement, with Rolls-Royce RB211-524H-T engines, each rated 60,600 lbf (264 kN) and Honeywell avionics--STSA competition abandoned in August 1999, reinstated, and won by the Boeing C-17A.
Variant ordered by the Russian Air Force with new avionics, a new improved braking system and a payload of 150 tonnes.
As of June 2019[update], five An-124 hull-loss accidents have been recorded, with a total of 97 fatalities:
On 13 October 1992, SSSR-82002, operated by Antonov Airlines crashed near Kiev, Ukraine during flight testing, suffering nose cargo door failure during high-speed descent (part of test program) resulting in total loss of control. The airplane came down in a forest near Kiev, killing eight of the nine crew on board.
On 15 November 1993, RA-82071, operated by Aviastar Airlines crashed into a mountain at 11,000 feet (3,400 m) while in a holding pattern at Kerman, Iran. 17 fatalities.
^Though the as planned An-124-100M-150 enlarged version has a 7% higher payload than the operational Boeing 747-8F. The 747-8F has over two times the range (5,050 mi or 8,130 km) with a payload of 295,800 lb (134,000 kg) than the An-124-100M-150 with the same payload. The An-124-100M-150 is to carry less than half the payload at the same range.