1. 1. Dhruv Advanced Light Helicopter (ALH), India
2. 2. CONTENT INTRODUCTION DESIGN WEAPONS HELICOPTER CABIN ENGINES
3. 3. INTRODUCTION The Helicopter Division of the government-owned Hindustan Aeronautics Limited (HAL) has developed the Dhruv (Pole Star) advanced light helicopter (ALH), a light (5.5t class) multirole and multimission helicopter for army, air force, navy, coastguard and civil operations, for both utility and attack roles by day and night. The helicopter, which is built to FAR 29 specifications, entered series production in 2000.
4. 4. DESIGN The helicopter is of conventional design and about two-thirds by weight of composite construction. The high tail boom allows easy access to the rear clamshell loading doors. The blades are mounted between cruciform-shaped carbon-fibre-reinforced plastic plates on a fibre elastomer constructed rotor head. The helicopter is equipped with an active vibration control system developed by Lord Corporation of North Carolina that uses sensors to monitor on-board conditions and outputs signals to actuators to cancel fuselage floor vibrations.
5. 5. WEAPONS The army and air force helicopters have stub wings fitted to carry up to eight anti-armour missiles, four air-to-air missiles or four rocket pods for 70mm and 68mm rockets. In December 2006, Nexter Systems (formerly Giat) was awarded a contract for the installation of the THL 20 20mm gun turret on the first 20 Indian forces Dhruv helicopters. The turret is armed with the M621 low-recoil cannon and is combined with a helmet-mounted sight.
6. 6. HELICOPTER CABIN The 7.3m cabin accommodates several layouts. As a passenger helicopter the cabin accommodates 12 or 14 seats. A crew door and a rearward sliding door are installed on each side of the fuselage for the military helicopters. The cargo compartment at the rear of the cabin has a volume of 2.16m. Clamshell doors at the rear of the cabin provide easy and fast access for loading and unloading cargo.
7. 7. ENGINES The helicopter has a twin-engine configuration allowing continued flight virtually throughout the flight envelope. The prototype helicopter is fitted with two Turbomeca TM 333-2C or 2B2 engines rated at 740kW take-off power. The helicopter is fitted with self-sealing crash-resistant tanks installed under the cabin floor. The fuel system includes cross feeding and fuel dumping systems. The maximum fuel capacity is 1,400l.
8. 8. REFERNCE http://www.army- technology.com/projects/dhr uv/
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