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Antonov An-70

Antonov An-70The AN-70 aircraft belongs to a new generation of the short takeoff and landing tactical military medium transport. AN-70 is capable to carry practically any item of the military armament and equipment nomenclature with a total weight up to 35-47 t of cargo over the 3,000-5100 km range at cruising speed of 700-750 km/h, air drop of personnel and vehicles, including the single piece of cargoes up to 21 t with both high and low altitudes, delivery of 300 soldiers and evacuation of 206 wounded and sick persons. Maximum service range is 8,000 km. Depending on the type of operation and takeoff weight, AN-70 can be operated both from the concrete runways of the 1550-1800 m length with an average-strength covering and unpaved strips of the 600-700 m length with a low covering strength. With the short takeoff and landing regime, when operating from the 600-700 m length unpaved runways, AN-70 is capable to carry 20 t of cargo to the 3,000 km range.

Four D-27 engines with the SV-27 counter-rotating propfans ensure a high cruising speed and 20-30% fuel economy in comparison with modern turbojet airplanes. The integrated digital system of the airborne equipment provides operation of the aircraft at all latitudes, around-the-clock, in the VFR and IFR weather conditions, the flights over the military dispositions, the takeoff and landing from the unequipped unpaved airfields. Application of the equipment with the multiplex channels of data exchange makes it possible to modify and adapt easily the onboard avionics to any version. The build-in aerial delivery system ensures the autonomous loading/unloading of the wide range of cargoes and their air dropping. The onboard loading equipment consists of four overhead rail electric motor hoists with a total cargo lifting capacity of 12 t, two onboard electric winches with the 1.5-ton tractive effort each. At customer request the aircraft can be equipped with the easily removable upper deck or roller conveyer to automate the container handling operations.

The onboard monitoring and diagnostic systems make possible the autonomous operation of the AN-70 aircraft from the poorly equipped airfields without application of any special ground facilities. The aircraft maintenance is based on the "on-condition" strategy. High technical and operational potential of the AN-70 aircraft allows to create on its basis the entire range of the variants and modifications for the military and civil purposes: aircraft equipped with EWS, flying command post, patrol aircraft, tanker and the AN-70T civil-aviation family.

The International Consortium, the Medium Transport Aircraft (MTA), was founded in 1996. Among the MTA founders, besides ANTONOV ASTC, there were the aircraft commercial production factories, the aircraft engine and equipment designers, some business corporations and governmental representatives. The MTA Consortium forms and executes the joint research and development activity, production, economical and foreign trade activities, provides the long-term cooperation and unification of the financial, physical and other resources to solve the issues of the AN-70 certification, production, marketing, leasing, and after-sale support.

The An-70 was developed by Antonov as a replacement for its An-12, which is currently in widespread military and civilian use with operators throughout the CIS. It was originally designed to be in production in 1988. The An-70 belongs to a new class of short takeoff and landing tactical military transports. The AN-70 military transport STOL aircraft has no equal in the world in a number of its characteristics. This aircraft is very capable of accopplishing qualitatively new tasks beyond possibilities of previous military transports. The AN-70 is unique owing to its ability to take off from short unpaved runways of only 700 m length with heavy cargo.

AN-70 cargo cabin dimensions allow the aircraft to accomodate almost all types of military equipment and armament of CIS and NATO countries. The An-70 is capable of carrying practically any item from military armament and equipment nomenclature with a total weight of up to 47 tons. The aircraft is capable of delivering 20-35 tons of cargo over the range of 5,000-6,600 km at cruising speed of 750 km/h, air dropping of personnel and vehicles including single cargoes of up to 20 tons from both high and low altitudes, delivery of 300 soldiers and evacuation of 206 wounded and sick.

Antonov An-70The most prominent feature of the An-70 is its four Russian designed propfans. Four D-27 engines with counter-rotating SV-27 propfans ensure high cruising speed and 20-30% fuel saving in comparison with modern airplanes with turbojet engines. The propfans consist of 14 blade Stupino counter rotating scimitar propellers and the Progress turboprops. Combined these are designed to offer very high speed combined with low fuel consumption. The Russian developed SV-27 all composite propellers are highly swept and are claimed to have a 90% efficiency in cruise, at near jet speeds.

Takeoff and landing speeds are lower thanks to the propfans, while the An-70's ability to fly from relatively short fields means it can operate from 80% of all ClS airstrips, allowing shorter journeys and greater point to point flights. Depending upon the type of operation and takeoff weight, the An-70 can be operated on both average-strength hard-surface runways and unpaved 700-900 m strips with low surface strength. In case of short takeoff and landing on 700 m unpaved runways, the An-70 is capable of carrying 20-30 t of cargo over the range of 1,200-3,000 km.

For the An-70 loss of one of the four engines with a high probability of lead if not for disaster, to a serious accident. This is due to the fact that a significant portion of the wing lift is created by the running of the propeller. When an engine failure appear severe expands and heeling moments that require symmetric power decrease powerplant. Such an outcome and was demonstrated at Omsk. For military plane that will be used for fire effects, such features are not valid in principle.

The An-70 is one of the most recent aircraft to be developed in the Commonwealth of Independent States and incorporates a range of modern technology design concepts. Composite materials are used throughout the airframe, including the horizontal and vertical tails which are all composite. The integrated digital complex of onboard equipment provides operation of the aircraft in all latitudes, all and around-the-clock, in VFR and adverse weather conditions, flights over unmarked terrain, protection against antiaircraft means, formation flying, takeoff and landing on unequipped unpaved airfields.

Antonov An-70The An-70 also incorporates fly-by-wire and an advanced flightdeck with six full color digital displays and a head up display used for landings on short strips. The digital avionics are also linked via a databus equivalent to US 1553B standard, believed to be another first for a ClS aircraft, and allowing far easier integration of western avionics in the future. Use of equipment with multiplex channels of data exchange makes it possible to easily modify and adapt the onboard avionics structure to suit any version.

Onboard aerial delivery system ensures autonomous loading/unloading of a wide variety of cargoes and their air dropping. The onboard loading equipment comprises four overhead rail electric motor hoists with total cargo lifting capacity of 12 t, two onboard electric winches each with a 1.5-ton tractive force. At customer option, the aircraft may be equipped with an easily removable upper deck or roller conveyer for container handling automation. Onboard monitoring and diagnostic means make possible the autonomous operation of the An-70 aircraft on poorly equipped airfields without use of any special ground facilities. The aircraft maintenance is based on the "on-condition" strategy.

At the end of 2012, Antonov completed a deep modernization of An-70 aircraft. In particular, to ensure the transition to a fully digital control board complexes and systems, cathode-ray tubes in the cockpit replaced by liquid crystal displays, onboard electronic computers are replaced with more efficient, he said. Thus, the AN-70 was an ample supply of competitiveness not only on the characteristics of airframe and power plant, but also on-board systems.

An-70 models include the basic An-70 military freighter, two crew An-70-100, export An-77 and commercial An-70T. The proposed An-70TK would be a twin propfan convertible passenger/freight aircraft. The high technical and operational potential of the An-70 aircraft allows to create on its basis an entire range of versions and modifications for military and civil use: AEW aircraft, flying command post, patrol aircraft, tanker and a family of the civil-aviation An-70T transports.



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