HAL Dhruv (Polaris)

History

While still largely reliant on foreign suppliers, the Indian military industry has made strides in developing in-house solutions to meet continued demand. Hindustan Aeronautics Limited (HAL) has developed the "Dhruv" (meaning "North Star") as a medium multi-role helicopter for the Army, Air Force and Navy. Since then, about 200 examples of this type have been produced.

Its armed combat version is HAL "Rudra".

The Dhruv was introduced in late 1984, stemming from a 1979 requirement for a 5-ton multi-role military helicopter. The process involved foreign aid from Germany's MBB group - then West Germany. The first flight was recorded on August 20, 1992. However, due to technical challenges, sanctions, changing Army requirements (and its overall commitments) and internal economic issues, the development phase was plagued by delays - its first flight was actually planned for 1989.

This led to the platform's eventual launch in March 2002.

Another setback was the engine of choice - the American LHTEC T800 turboshaft - which was embargoed. This forced engineers to choose a model of French origin (India has had close ties to both France and Russia in recent decades) among the 1,000-horsepower Turbomeca TM333-2B2 turboshaft engine.

Then the choice of the French engine required the help of French engineers, which benefited the program a lot.

At its core, Dhruv is a very traditional multi-role platformer. It has a well-glazed cockpit that can accommodate two people side by side. Behind the cockpit is the passenger seating area, separated on both sides by sliding doors.

The engine is located in the canopy as usual and drives the starboard-mounted four-blade composite main rotor (low-mounted) and four-blade tail rotor (via an extended shaft in the tail shaft). For ease of operation and maintenance, the landing gear was fixed as a dual slide assembly, although some versions with retractable wheeled landing gear were also seen.

The raised tailstock allows for the installation of a clamshell access door at the rear of the fuselage. The tail also includes a vertical tail (to which the tail rotor's drive gear is mounted) and low mounting level (with a smaller vertical tail).

The Dhruv military form originally came under the Mk. 1 designation, a rough form of the intended design, with a mechanically measured cockpit. Production of these products began in 2001, with approximately 56 units delivered. The Mk.

2 introduces a locally designed and developed (by HAL) all-glass cockpit for a more modern look. These are largely faithful to the Mk. 1st version in addition to advanced internals and production started in 2007. The Mk.

3 received an upgraded engine (1,200 hp "Shakti" engine), improved countermeasure customization (hay and flare dispensers), improved electronic warfare equipment (EW), improved survivability and vibration control solutions. The introduction of this form took place in 2012. Mk.

4 "Rudra" is the already mentioned armed combat model with an integrated weapon system.

Dhruv also exists in the civilian market in C, CFW and CS models. These spaces can accommodate up to 12 passengers and have been in use since late 2003. The helicopter is in service (or will soon be in service) with the governments of Ecuador, India, Israel, Maldives, Mauritius, Nepal and Suriname. In civilian airspace, Dhruv has been spotted (or ordered) in India, Turkey and Peru.

The first export customers were Nepal and Israel.

Specification

Basic

Production

Roles

Dimensions

Weight

Performance

Performance

Armor

Changes