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AgustaWestland AW109 Multirole Military / Utility Helicopter (1976)

Authored By Staff Writer | Last Updated: 7/2/2014

The AgustaWestland AW109 helicopter has gone on to see worldwide use by in both military and civilian roles.

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The British-Italian helicopter concern of AgustaWestland developed their AW109 model of 1971 as a commercial-level passenger-minded transport. Initial work began in the latter part of the 1960s under the guise that the new product be centered around a single turboshaft engine in an effort to keep developmental, and ultimately procurement, costs down. All other aspects of the helicopter would remain highly conventional with a lightweight classification. By 1970 the design had evolved to become a twin turboshaft-powered mount and assigned the company designation of AW109 (AgustaWestland Model 109). First flight of the type was recorded on August 4th, 1971 to which a years-long period of testing ensued before the aircraft was brought to market in 1976. The series maintains an active presence all over the world today (2013) and is featured in many military forces as well.

The AW109's design was that of a sleek and aerodynamically-refined aircraft featuring a well-sloped and pointed nose assembly. The cockpit was set well ahead in the design with seating for two pilots behind a two-piece forward windshield for excellent visibility out of the cockpit. Entry and exit from the cockpit was through hinged automobile-style doors fitted to either side of the cockpit. Aft of the cockpit was the passenger cabin with variable seating or medical litter options. Search and Rescue types were outfitted with specialized equipment for their given role and armed versions showcased door-mounted machine guns. Entry and exit to the passenger cabin was via rectangular sliding doors to either side of the cabin, these doors sliding rearwards against the helicopter's body. The powerplant was fitted above the cabin roof in the usual way and powered a four-bladed main rotor atop a short mast as well as a two-bladed tail rotor at the rear (the tail rotor facing portside). The empennage consisted of a tapered assembly which housed the tail rotor shaft within. The tail unit was slightly raised from the fuselage underside and capped at its aft end by a large dorsal and smaller ventral vertical tail fin. Horizontal stabilizers were set along the tail stem near the rudder. The undercarriage consisted of two single-wheeled main legs and a single-wheeled nose leg, all were retractable into the floor of the A109 (on most production versions).

The AW109 first appeared in the aptly-designated A109A production model fitted with 2 x Allison Model 250-C20 American turboshaft engines. The A109A EOA was a specially developed militarized version for service with the Italian Army while the A091B proved another militarized model that fell to naught. The A109A was modernized through the A109A Mk II initiative and this begat a MEDEVAC version as the A109A Mk II MAX. The A109C grew into a commercial passenger model sporting 2 x Allison Model 250-C20R-1 turboshaft engines with seating for eight and was followed by a MEDEVAC as the A198C MAX.


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Specifications for the
AgustaWestland AW109
Multirole Military / Utility Helicopter


Focus Model: AgustaWestland A109 (Power)
Country of Origin: Italy
Manufacturer: AgustaWestland - Italy
Initial Year of Service: 1976
Production: 600


Crew: 2 + 8


Length: 42.78 ft (13.04 m)
Width: 36.09 ft (11.00 m)
Height: 11.48ft (3.50 m)
Weight (Empty): 4,409 lb (2,000 kg)
Weight (MTOW): 6,614 lb (3,000 kg)


Powerplant: 2 x Pratt & Whitney Canada 206C turboshaft engines delivering 567 horsepower OR 2 x Turbomeca Arrius 2K1 turboshaft engines delivering 571 horsepower to a four-bladed main rotor and two-bladed tail tail rotor.


Maximum Speed: 177 mph (285kmh; 154 kts)
Maximum Range: 599 miles (964km)
Service Ceiling: 19,685 ft (6,000 m; 3.7 miles)
Rate-of-Climb: 1,930 feet per minute (588 m/min)


Hardpoints: 2
Armament Suite:
Usually none. Armed (Military) Versions can field any of the following:

2 x 12.7mm heavy machine gun pods
2 x 7.62mm general purpose machine gun pods
2 x 12.7mm OR 7.62mm machine gun on pintle mounts at cabin doors.
2 x TOW anti-tank missiles (2x2 OR 2x4 each)
2 x 7-shot 2.75in/81mm unguided rocket pods
2 x 12-shot 2.75in/81mm unguided rocket pods
2 x rocket/machine gun pod combo mounting (3 rockets, 200 x machine gun ammunition).


Variants:
A109 - Base Series Designation


A109A - Initial Production Models; fitted with 2 x Allison Model 250-C20 turboshaft engines.

A109A EOA - Italian Army model

A109A Mk II - Modernized commercial A109A

A109A Mk II MAX - MEDEVAC variant based on A109A Mk II variant.

A109B - Proposed military variant; never produced.

A109C - Commercial passenger variant; fitted with 2 x Allison Model 250-C20R-1 turboshaft engines; seating for eight passengers.

A109C MAX - MEDEVAC variant of the A109C

A109D - One-Off Prototype Form

A109E "Power" - Modernized commercial passenger variant; fitted with 2 x Turbomeca Arrius 2K1 or 2 x Pratt & Whitney PW206C turboshaft engines.

A109E "Power Elite" - Lengthened passenger cabin; based on A109E production model.

A109 LUH (Light Utility Helicopter) - Militarized variant based on the A109E Power series.

MH-68A "Stingray" - US Coast Guard operational model for search & rescue sorties and armed intercept.

A109K - Militarized variant

A109K2 - Hot-and-High performance model with fixed undercarriage.

A109M - Militarized variant

A109KM - Hot-and-high militarized variant of the A109M.

A109KN - Navalized variant of the A109M

A109CM - Base military model of the A109M

A109GdiF - Specialized variant of the A109M for service with the Guardia di Finanza of Italy.

A109BA - Belgian Army Variant

AW109S "Grand" - Fitted with 2 x Pratt & Whitney Canada PW207 series turboshaft engines; lengthened passenger cabin; revised main rotor blades.

CA109 - Local Chinese license-production variant of the A109 under the CAIC label.

AW109 "Grand New" - Simplified AW109S Grand

AW109 SP - Alternative designation for AW109 Grand New model.


Operators:
Albania; Argentina; Australia; Bangladesh; Belgium; Benin; Bulgaria; China; Chile; Ghana; Greece; Honduras; Iran; Italy; Japan; New Zealand; Latvia; Malaysia; Mexico; Montenegro; Nigeria; Paraguay; Peru; Poland; Saudi Arabia; South Africa; Slovakia; Slovenia; Sweden; United Kingdom; United States; Venezuela