AW139 Multimission Helicopter - Military Analizer (2022)

TheAgustaWestland AW139is a 15-seat medium-sized twin-enginedhelicopterdeveloped and built byAgustaWestland(now part ofLeonardo). It is marketed at several different roles, including VIP/corporate transport, offshore transport, fire fighting, law enforcement, search and rescue, emergency medical service, disaster relief, and maritime patrol.In addition to AgustaWestland’s manufacturing facilities in Italy and the United States, the AW139 is produced in Russia by HeliVert, a joint venture between AgustaWestland andRussian Helicopters.

The AW139 was originally designed and developed jointly by Agusta andBell Helicoptersand marketed as theAgusta-Bell AB139, being redesignated AW139 when Bell withdrew from the project. Since entering service in 2003, the AW139 has become one of AgustaWestland’s most influential products; it has been subsequently developed into the enlarged medium-lift military-orientatedAW149.

Development

Origins

In 1997, the Italian helicopter manufacturerAgustalaunched a programme to develop a replacement for theBell Huey familyof helicopters (which had been built in very large numbers byBell Helicopterand under license by Agusta). A potential market of 900 aircraft was predicted. In 1998, Bell and Agusta entered into an agreement setting up a joint venture, Bell/Agusta Aerospace Company (BAAC), to develop two aircraft: a conventional helicopter and atiltrotoraircraft. These became the Bell/Agusta AB139 andBell/Agusta BA609respectively.Bell was to be the leading partner for the development of the BA609 while Agusta would be the lead partner for the AB139; it was intended for production, sales, and support to be shared.

On 26 September 2000, the first order for the type was placed byBristow Helicopters. The first preproduction helicopter flew on 3 February 2001 atVergiatein Italy,with two further AW139s also participating in flying trials.The first production AW139 made its first flight on 24 June 2002. European JAA certification was received in June 2003, and its FAA type certificate followed in December 2004. By May 2005, the AW139 had received in excess of 100 orders worldwide.In the US, the type was marketed under the designation US139, and was entered into the US Army’s Light Utility Helicopter competition.One key market for the AW139 was the oil & gas industry, which required helicopters of increased endurance for offshore operations.In 2005, AgustaWestland bought out Bell’s 25% share in the program and all of its rights to the AW139 for $95 million.

In April 2008, AgustaWestland revealed that it was in the process of certifying an increase in the AW139’s max gross weight to 14,991lb (6,800kg) to better compete in long-range markets served by helicopters such as the largerSikorsky S-92andEurocopter EC225.In 2007, a second production line at theUnited StatesAgustaWestland Aerospace plant inPhiladelphia,Pennsylvaniawas established;the Philadelphia plant produced its 200th AW139 in September 2014, at which point U.S. production was intended to reach 40 units per year in the near future.By 2011, AgustaWestland was producing 90 AW139s per year; 9.5% of the company’s overall revenue in 2010 was attributed to the type.By 2013, a combined total of 720 AW139s had been sold to over 200 operators in 60 different countries.

Further development

In 2011, a military-configured variant, the AW139M, was revealed by AgustaWestland. It was promoted at the US market, including for the U.S. Air Force’s Common Vertical Lift Support Program. The AW139M is equipped with a high definition forward-looking infrared (FLIR), self-protection system, heavy-duty landing gear, and has low thermal and acoustic signatures; a significant proportion of the equipment is sourced from American manufacturers. Options offered include an external stores system including various armaments, armoured seats, self-sealing fuel tanks, and a full ice protection system for all-weather operations.

The AW139 serves as the basis for AgustaWestland’s wider business strategy, under which it aims to produce a standardised family of helicopters with common design features. The sharing of components and design philosophies is intended to simplify maintenance and training for operators; commonality also lowers the production costs. The AW139 was the first of this group, and as of 2014, it was to be joined by the largerAW149andAW189, aimed at military and civilian customers respectively. Advances made in the development of new models are intended to be transferable onto existing family members, decreasing the cost of future upgrades for the AW139.

In June 2010, it was announced that AgustaWestland and Rostvertol would build a manufacturing plant inTomilino, Moscow Region, where it was initially planned to produce AW139s by 2012.HeliVert, a joint venture between AgustaWestland and Rostvertol, commenced domestic production of the AW139 in 2012, at which point it was planned that between 15 and 20 helicopters would be produced per year. The first AW139 to be assembled in Russia made its first flight in December 2012.In January 2013, the Russian Defense Ministry was reportedly considering placing an order for seven AW139s.In January 2014, HeliVert received a Certificate of Approval from the Aviation Register of the Interstate Aviation Committee to commence production of commercial AW139s.In September 2014, a certificate was granted to perform comprehensive maintenance and servicing of the type at the Tomilino facility.

In 2015, AgustaWestland unveiled an AW139 variant with an increased gross weight of 7tonnes, enabling a range of 305km while carrying 12 passengers; existing AW139s can also be rebuilt to the newer heavy-weight model. The heavier airframe comes at the expense of decreased hot and high performance.In November 2015, AgustaWestland demonstrated a 60-minute “run-dry” test (no oil) of an AW139’s main gearbox, 30 minutes greater than any other certified rotorcraft at the time.

Design

The AW139 is a conventional twin-engine multi-role helicopter. It has a five-bladed fully articulated main rotor with atitaniumhub and composite blades and a four-bladed articulated tail rotor. It is fitted with retractabletricycle landing gear, the two aft wheels retracting into external sponsons which are also used to house emergency equipment.It is flown by a crew of two pilots, with up to 15 passengers accommodated in three rows of five. The AW139 had been aimed at a vacant niche in the market, sitting below larger types such as theEurocopter AS332 Super PumaandSikorsky S-92, and above smaller ones like theBell 412andEurocopter EC155.Rotor & Wing has described the AW139’s flying attitude as ‘docile and predictable’.

The AW139 is powered by twoFADEC-controlledPratt & Whitney Canada PT6Cturboshaft engines; the FADEC system seamlessly adjusts the engines for pilot convenience and passenger comfort, and can automatically handle a single-engine failure without noticeable deviation.It was constructed with maintenance requirements in mind; critical systems can be readily accessed, where possible the number of parts has been reduced, and many components have been designed for an extended lifecycle; a Health and Usage Monitoring System (HUMS) is also equipped.More than a thousand customizable items of equipment can be configured per customer demand, including auxiliary fuel tanks, rescue hoists, cargo hooks, search and weather radar, ice protection systems, external cameras and searchlights, and seating arrangements.

The AW139 features a modularglass cockpit, a commonly-installed feature being the four-axis autopilot, which enables functions such as auto-hover capability. The cockpit has been designed to enable single-pilot flight operations underinstrument flight rulesconditions, and it is also compatible with the use ofnight vision goggles.Pilot training for the type is available via advanced Level D Full Flight Simulators. According to Shipping & Marine, the AW139 has “the largest cabin in its class”; containing up to 15 passengers or four litters and accompanying medics, an additional baggage compartment is used to stow equipment to keep the main cabin clear for use.

Large sections of the AW139 have been developed and produced by a range of different companies. Airframes are typically produced byPZL-Świdnik, who delivered their 200th airframe in April 2014.Pratt & Whitney Canadaproduce the type’s PT6C turboshaft engines, while the primary and secondary transmissions were developed byWestland GKNandKawasaki Heavy Industriesrespectively. A significant portion of the avionics are sourced fromHoneywell.Turkish Aerospace Industrieshas been subcontracted to manufacture various elements of the AW139, including the fuselage, canopy, and radome.Final assembly of most AW139s is performed at AgustaWestland’s facilities inPhiladelphia,United States, andVergiate,Italy;those destined for customers within theCommonwealth of Independent Statesare typically assembled by a third final manufacturing plant inTomilino,Moscowoperated by HeliVert.

Variants

  • AB139: Original Italian-built production aircraft, 54 built.
  • AW139: Designation change from 55th aircraft onwards, built in Italy.
  • AW139 (long nose configuration): Long nose variant with increased room for avionics built in Italy and the United States.
  • AW139M: Militarised variant, capable of carrying various weapons payloads.
  • HH-139A: Italian Air Force designation for ten search-and rescue configured AW139Ms.
  • VH-139A: Italian Air Force designation for two VIP configured AW139s.
  • US139: Military variant, was the AgustaWestland proposed entry for the US Army Light Utility Helicopter programme in partnership with L-3 Communications.
  • MH-139 Grey Wolf: Military variant from Boeing in partnership with Leonardo.It was selected by the US Air Force to replace the service’sUH-1Nfleet with the first four MH-139As to be delivered in 2021.The USAF accepted its first MH-139 on 19 December 2019 and named it “Grey Wolf”.

Specifications (AW139)

Crew1 / 2
Capacityup to 15 passengers, depending on configuration
Length (rotors running)
16.66m (54ft 8in)
Width2.26m (10ft 0in)
Height4.98m (16ft 4in)
Main rotor diameter13.80m (45ft 3in)
Loaded weight6,400kg (14,110lb); 7,000kg (15,000lb) for 7 t version
Empty weight
Max take off weight
Maximum speed (Vne)310km/h (193mph, 167kn)
Cruising speed at sea level306km/h (191mph, 165kn)
Ascent speed at sea level10.9m/s (2,140ft/min)
Ceiling in service6,096m (20,000ft)
Passable distance at sea level with standard reserve1,061km (659mi, 573nmi)
Powerplant2 ×Pratt & Whitney Canada PT6C-67Cturboshaft engine , 1,142kW (1,531hp) each

Operators

  • Algeria
    • Algerian Air Force
    • Algerian Navy
  • Royal Australian Air Force(contracted withCHC Helicopter)
  • Bangladesh Air Force
  • Cyprus Air Force
  • Egyptian Air Force
  • Irish Air Corps
  • Italian Air Force – 15 AW139 in service.
  • Kenya Air Force
  • Lebanese Air Force
  • Libyan Air Force
  • Nigeria
    • Nigerian Air Force
    • Nigerian Navy
  • Pakistan
    • Pakistan Air Force
    • Pakistan Army
  • National Air of Panama
  • Qatar Emiri Air Force
  • Senegalese Air Force
  • Royal Thai Army
  • Turkmen Air Force
  • UAE Air Force
  • United States Air Force – 83 MH-139 Grey Wolf planed.

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