Kraków June 8, 2018
315a Section 2005.
Agusta A.109 construction
Agusta A.109 is a lightweight, two-engine, metal helicopter. Constructed in the classic Sikorsky system.
The rotor has 4 blades. The blades are articulated. The rotor blades can be folded manually for hangar. The rotor is equipped with a brake. The rotor blades are made of metal: aluminum, steel and nickel.
The propeller has 2 blades. The propeller is placed on the left side of the tail beam.
The main gearbox reduces rotations to the rotor 1: 15.26 and the propeller 1: 2.88.
The fuselage of the helicopter is made of aluminum and consists of 5 main elements: nose part, cockpit, cabin, rear part and tail boom.
The chassis is tripartite, with a front wheel, single wheels, concealed in flight. The chassis retracting mechanism is hydraulic. Tubeless tires have dimensions 306x135,6 mm, pressure 0.59 MPa. Some A.109 helicopters have been equipped with a non-retractable landing gear.
A.109 helicopter optionally have inflatable floats for emergency landing on water. This system is manufactured by Garret Air Cruisers.
The helicopter is piloted by two or one pilot. The helicopter cabin accommodates six passengers. Two rows of three seats.
The sanitary version takes two stretchers and two paramedics aboard. The equipment has a winch with a lifting capacity of 150 kg.
The army version takes seven soldiers aboard.
The A.109 helicopter is powered by two Allison 250-C20B turbine engines, manufactured in the USA. These engines are used in Bell Jet Ranger helicopters, MBB B0-105 and Hughes 500.
Engine dimensions: 1.946 m length, 0.483 m width, height 0.572 m. Engine weight 71.5 kg. Start power 313 kW, nominal power 272 kW. The gas temperature before the turbine is 810 degrees Celsius. The oil installation has a volume of 7.7 liters.
An alternative engine is the Turbomeca Arriel 1K engine with a starting power of 522 kW and a nominal power of 437 kW.
The main fuel tank is mounted in the rear part of the fuselage. It has a capacity of 550 liters. In version A.109 K, the fuel tank capacity has been increased to 700 liters. In Agusta A.109 helicopters, it is possible to install additional internal fuel tanks.
Electrical installation with constant current and voltage of 28V. The helicopter has two alternators (30V/150A) that are used to start the engines. Batteries (24V, 22Ah). Alternating current, 1-phase is obtained from three thyristor inverters (115 / 26V, 250Ah).
Avionics is assembled depending on the client's wishes.
VHF / MF radio station
UHF / MF radio station
ADF radio compass
4-channel automatic remote control
Vibration stabilization and damping system
Radio or laser altimeter
Weather radar or other type
Glass cockpit (since 1995)
Specifications Agusta A.109A (Data T-T)
Overall length 13.08 m (42,91 ft)
The length of the hull is 11.11 m (36,45 ft)
Total height 3.21 m (10,53 ft)
Diameter of the main rotor 11.00 m (36,09 ft)
The diameter of the propeller is 2.03 m (6,66 ft)
Width of the horizontal tail 2.88 m (9,45 ft)
Chassis base 3.53 m (11,58 ft)
Spacing of the main chassis 2.45 m (8,04 ft)
The cab volume is 2.83 m 3 (99,94 ft 3)
The luggage volume 0.52 m 3 (18,36 ft 3)
The surface of the rotor blade 1.82 m 2 (19,59 ft 2)
The surface of the propeller blade is 0.20 m 2 (2,15 ft 2)
The surface of the rotor wheel 95 m 2 (1 022,57 ft 2)
The surface of the propeller wheel 3.21 m 2 (34,55 ft 2)
Starting nominal weight 1.415 kg (3 119,54 lb)
Starting weight, maximum 2.600 kg (5 732,02 lb)
Top speed 311 km / h (193,25 mph)
Cruising speed 266 km / h (165,28 mph)
Lifting speed 488 m / min (8,13 m/s, 18,19 mph)
Operating cap 4 572 m (15 000 ft)
Operating cap with 1 engine running 1 370 m (4 494,75 ft)
The maximum range is 615 km (382,14 mi, 332,07 nmi)
Flight time up to 3 hours 30 minutes.
Written by Karol Placha Hetman