Antonov An-225 Mriya

The Antonov An-225 Mriya (Ukrainian: Антонов Ан-225 Мрія, lit. 'dream' or 'inspiration'; NATO reporting name: Cossack) is a strategic airlift cargo aircraft that was designed by the Antonov Design Bureau in the Ukrainian SSR within the Soviet Union during the 1980s. It is powered by six turbofan engines and is the heaviest aircraft ever built, with a maximum takeoff weight of 640 tonnes (710 short tons; 630 long tons). It also has the largest wingspan of any aircraft in operational service. The single example built has the Ukrainian civil registration UR-82060. A second airframe with a slightly different configuration[1] was partially built. Its construction was halted in 1994[1] because of lack of funding and interest, but revived briefly in 2009, bringing it to 60–70% completion.[2] On 30 August 2016, Antonov agreed to complete the second airframe for Airspace Industry Corporation of China (not to be confused with the Aviation Industry Corporation of China) as a prelude to commencing series production.[3]

An-225 Mriya
The An-225 in current livery in 2012
Role Outsize cargo freight aircraft
National origin Soviet Union
Design group Antonov
Built by Antonov Serial Production Plant
First flight 21 December 1988
Status In service
Primary user Antonov Airlines
Produced 1985
Number built 1
Developed from Antonov An-124

The Antonov An-225 was an enlargement of the successful Antonov An-124 that was initially developed for transporting Buran-class orbiters. The only An-225 airplane was completed in 1988. After successfully fulfilling its Soviet military missions, it was mothballed for eight years. It was then refurbished and re-introduced, and is in commercial operation with Antonov Airlines carrying oversized payloads.[4] The airlifter holds the absolute world records for an airlifted single-item payload of 189,980 kilograms (418,830 pounds),[5][6] and an airlifted total payload of 253,820 kg (559,580 lb).[7][8] It has also transported a payload of 247,000 kg (545,000 lb) on a commercial flight.[9]

Development
An-225 carrying Buran in 1989

The lead designer of the An-225 (and the An-124) was Viktor Tolmachev.[10]

The Antonov An-225 was designed to airlift the Energia rocket's boosters and the Buran-class orbiters for the Soviet space program. It was developed as a replacement for the Myasishchev VM-T. The An-225's original mission and objectives are almost identical to that of the United States' Shuttle Carrier Aircraft.[11][12]

The An-225 first flew on 21 December 1988[13] with a 74-minute flight from Kiev. The aircraft was on static display at the Paris Air Show in 1989 and it flew during the public days at the Farnborough air show in 1990. Two aircraft were ordered, but only one An-225 (registration CCCP-82060 later UR-82060[14]) was finished. It can carry ultra-heavy and oversize freight, up to 250,000 kg (550,000 lb) internally,[11] or 200,000 kg (440,000 lb) on the upper fuselage. Cargo on the upper fuselage can be 70 m (230 ft) long.[15]

The second An-225 was partially built during the late 1980s for the Soviet space program. Following the collapse of the Soviet Union in 1991 and the cancellation of the Buran program, the lone operational An-225 was placed in storage in 1994.[16][17] The six Ivchenko-Progress engines were removed for use on An-124s, and the second uncompleted An-225 airframe was also stored. In the 1990s, it became clear that a cargoliner bigger than the An-124 was needed. The first An-225 was restored by 2001.[8][18]

An-225 at Farnborough in 1990

By 2000, the need for additional An-225 capacity had become apparent, so the decision was made in September 2006 to complete the second An-225. The second airframe was scheduled for completion around 2008,[19] then delayed. By August 2009, the aircraft had not been completed and work had been abandoned.[4][20] In May 2011, the Antonov CEO is reported to have said that the completion of a second An-225 Mriya transport aircraft with a carrying capacity of 250 tons requires at least $300 million, but if the financing is provided, its completion could be achieved in three years.[21] According to different sources, the second aircraft is 60–70% complete.[22]

Airspace Industry Corporation of China (AICC)'s president, Zhang You-Sheng, told a BBC reporter that AICC first contemplated cooperation with Antonov in 2009 and contacted them in 2011. AICC intends to modernize the second unfinished An-225 and develop it into an air launch to orbit platform for commercial satellites at altitudes up to 12,000 m (39,000 ft).[13]

In April 2013, the Russian government announced plans to revive Soviet-era air launch projects that would use a purpose-built modification to the An-225 as a midair launchpad.[23]

In August 2016, representatives from Ukraine's Antonov and AICC, an import-export company operating out of Hong Kong,[24] signed an agreement to recommence production of the An-225, with China now planning to procure and fly the first model by 2019.[25][26] The aviation media cast doubt on the production restart, indicating that due to the ongoing Russia–Ukraine conflict needed parts from Russia are unavailable, although they may be made in China instead.[27]

On 25 March 2020, the freighter commenced a series of test flights from Hostomel Airport near Kiev, after more than a year out of service for the installation of a domestically-designed power management and control system.[28]

Design
An-225's main landing gear

Based on Antonov's earlier An-124, the An-225 has fuselage barrel extensions added fore and aft of the wings. The wings also received root extensions to increase span. The wings are anhedral.[29][18] The flight control surfaces are controlled via fly-by-wire and triple-redundant hydraulics.[8][30] Two more Progress D-18T turbofan engines were added to the new wing roots, bringing the total to six. An increased-capacity landing gear system with 32 wheels was designed, some of which are steerable, enabling the aircraft to turn within a 60-metre-wide (200 ft) runway. Like its An-124 predecessor, the An-225 has nose gear designed to "kneel" so cargo can be more easily loaded and unloaded.[8] Unlike the An-124, which has a rear cargo door and ramp, the An-225 design left these off to save weight, and the empennage design was changed from a single vertical stabilizer to a twin tail with an oversized, swept-back horizontal stabilizer. The twin tail was essential to enable the plane to carry large, heavy external loads that would disturb the airflow around a conventional tail. Unlike the An-124, the An-225 was not intended for tactical airlifting and is not designed for short-field operation.[11]

Three of six Ivchenko Progress D-18T turbofan engines on the An-225

Initially the An-225 had a maximum gross weight of 600 t (660 short tons; 590 long tons), but from 2000 to 2001 the aircraft underwent modifications at a cost of US$20M such as the addition of a reinforced floor, which increased the maximum gross weight to 640 t (710 short tons; 630 long tons).[31][32][33]

Both the earlier and later takeoff weights establish the An-225 as the world's heaviest aircraft, being heavier than the double-deck Airbus A380. It is surpassed in other size-related categories, however: Airbus claims to have improved upon the An-225's maximum landing weight by landing an A380 at 591.7 tonnes (1,304,000 lb) during tests,[34] and the Hughes H-4 Hercules, known as the "Spruce Goose", has a greater wingspan and a greater overall height. But the Spruce Goose is 20% shorter and overall lighter, due to the materials used in its construction. In addition, the H-4 only flew once, making the An-225 the largest aircraft in the world to fly multiple times.[8][35]

The An-225's pressurized cargo hold is 1,300 m3 (46,000 cu ft) in volume; 6.4 m (21 ft 0 in) wide, 4.4 m (14 ft) high, and 43.35 m (142 ft 3 in) long[8][36][37] — longer than the first flight of the Wright Flyer.[38][39][40]

Operational history
Antonov An-225 at Manchester Airport in 2006

During the last years of the Soviet space program, the An-225 was employed as the prime method of transporting Buran-class orbiters.[35]

Antonov commercialization
Antonov An-225 at Arlanda Airport, Sweden

In the late 1980s, the Soviet government was looking for a way to generate revenue from its military assets. In 1989, the Antonov Design Bureau set up a holding company as a heavy airlift shipping corporation under the name "Antonov Airlines", based in Kiev, Ukraine and operating from London Luton Airport in partnership with Air Foyle HeavyLift.[15][41]

The company began operations with a fleet of four An-124-100s and three Antonov An-12s, but a need for aircraft larger than the An-124 became apparent in the late 1990s. In response, the original An-225 was re-engined, modified for heavy cargo transport, and placed back in service under the management of Antonov Airlines.

Antonov An-225 at Hostomel Airport, Ukraine

On 23 May 2001, the An-225 received its type certificate from the Interstate Aviation Committee Aviation Register (IAC AR).[42] On 11 September 2001, carrying four main battle tanks[8] at a record load of 253.82 tonnes (279.79 short tons) of cargo,[7] the An-225 flew at an altitude of up to 10,750 m (35,270 ft)[43] over a closed circuit of 1,000 km (620 mi) at a speed of 763.2 km/h (474.2 mph).[44][45] The hire cost can be $30,000 per hour.[46]

The An-225 attracts a high degree of public interest, so much that it has managed to attain a global following due to its size and its uniqueness. People frequently visit airports to see its scheduled arrivals and departures, such as in Perth, Australia in May 2016 when a crowd of more than 50,000 people gathered at Perth Airport.[47]

Contracted flights

The type's first flight in commercial service departed from Stuttgart, Germany on 3 January 2002, and flew to Thumrait, Oman with 216,000 prepared meals for American military personnel based in the region. This vast number of ready meals was transported on 375 pallets and weighed 187.5 tons.[48]

The An-225 has since become the workhorse of the Antonov Airlines fleet, transporting objects once thought impossible to move by air, such as 150-tonne generators. It has become an asset to international relief organizations for its ability to quickly transport huge quantities of emergency supplies during disaster relief operations.[49]

The An-225 has been contracted by the Canadian and U.S. governments to transport military supplies to the Middle East in support of coalition forces.[49] An example of the cost of shipping cargo by An-225 was over 2 million DKK (approx. €266,000) for flying a chimney duct from Billund, Denmark to Kazakhstan in 2004.[50]

Antonov Airlines An-225 landing at Hostomel Airport, 2014

On 11 August 2009, the heaviest single cargo item ever sent by air freight was loaded onto the An-225. At 16.23 m (53.2 ft) long and 4.27 m (14.0 ft) wide, its consignment, a generator for a gas power plant in Armenia along with its loading frame, weighed in at a record 189 tonnes (417,000 lb).[5][6]

During 2009, the An-225 was painted in a new blue and yellow paint scheme,[51] after Antonov ceased cooperation with AirFoyle and partnered with Volga-Dnepr in 2006.[52]

On 11 June 2010, the An-225 carried the world's longest piece of air cargo, two 42.1 m (138 ft) test wind turbine blades from Tianjin, China to Skrydstrup, Denmark.[53][54]

The An-225 became involved in the COVID-19 pandemic relief effort, conducting flights to deliver medical supplies from China to other parts of the world.[55][56][57][58][55]

Operators
When at altitude, the An-225 has distinctive sextuple vapour trails
 Soviet Union
 Ukraine

Specifications (An-225 Mriya)
Comparison between five of the largest aircraft:
  Antonov An-225
  Airbus A380-800
  Boeing 747-8
  Hughes H-4 Hercules
  Stratolaunch

Data from Vectorsite,[11] Antonov's Heavy Transports,[59] and others[8][18][36][37]

General characteristics

  • Crew: 6
  • Length: 84 m (275 ft 7 in)
  • Wingspan: 88.4 m (290 ft 0 in)
  • Height: 18.1 m (59 ft 5 in)
  • Wing area: 905 m2 (9,740 sq ft)
  • Aspect ratio: 8.6
  • Empty weight: 285,000 kg (628,317 lb)
  • Max takeoff weight: 640,000 kg (1,410,958 lb)
  • Fuel capacity: more than 300,000 kg (661,000 lb)[60]
  • Cargo hold: volume 1,300 m3 (46,000 cu ft), 43.35 m (142.2 ft) long × 6.4 m (21 ft) wide × 4.4 m (14 ft) tall
  • Powerplant: 6 × Progress D-18T turbofans, 229.5 kN (51,600 lbf) thrust each

Performance

  • Maximum speed: 850 km/h (530 mph, 460 kn)
  • Cruise speed: 800 km/h (500 mph, 430 kn)
  • Range: 15,400 km (9,600 mi, 8,300 nmi) with maximum fuel; range with 200 tonnes payload: 4,000 km (2,500 mi)
  • Service ceiling: 11,000 m (36,000 ft)
  • Wing loading: 662.9 kg/m2 (135.8 lb/sq ft)
  • Thrust/weight: 0.234
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See also

Related development

Aircraft of comparable role, configuration and era

Related lists

References
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  2. Yeo, Mike (6 September 2016). "Antonov Sells Dormant An-225 Heavylifter Program to China". AINonline. Retrieved 15 December 2016.
  3. Lin, Jeffrey; Singer, P. W. (8 September 2016). "China Will Resurrect The World's Largest Plane". Popular Science. Retrieved 15 December 2016.. Note that the company name is wrong. The official press release has the right name:
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External media
Images
An-225 image gallery
Second Antonov An-225 (line no. 01-02) under construction, September 2004
Second Antonov An-225 under construction, August 2008
Second Antonov An-225 under construction, August 2008
Video
An-225 on YouTube The worlds biggest planes: Antonov An-225 in comparison with Airbus A380-800, Airbus A340-600 and Boeing 747-400
An-225 on YouTube Landing in crosswind
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