Indian Defence Review

Light Helicopters

Since the induction of the Allouette family into the IAF in the 1960s French helicopters have been used in the light utility segment by the IAF. HAL began manufacturing the Chetak (Allouette III) helicopters in 1962 under license from M/s SUD-AVIATION, later Eurocopter and now Airbus Helicopters. The first Chetak in a ‘fly-away’ condition was delivered in 1965. This was followed by Cheetah (Allouette II). The Chetak has an MAUW of 2.2 tonne and the Cheetah just 1.95 tonne. While the Cheetah can carry three passengers, the Chetak can carry five in addition to a two-man crew. Both types were flown extensively by the IAF as well as the Indian Army and the Indian Navy.

However, the Chetak and the Cheetah have been rather difficult to maintain since the original production lines were wound up in 1980s. HAL has been license-producing these types as well as carrying out their major maintenance tasks. The Cheetal (Cheetah with a Shakti aero-engine) was introduced to augment the Cheetah fleet for Operation Meghdoot. Its better load-carrying capability and reliability have encouraged the IAF to order a small number, reportedly 20, for its fleet.

The Chetak/Cheetah fleet was to be replaced by 197 light helicopters to be purchased from international vendor/s. Of these, 64 were to come to the IAF. The Request for Proposal (RFP) was first floated in 2008, and again in 2009, as the Reconnaissance and Surveillance Helicopter (RSH). Eurocopter AS 550 C3 Fennec emerged the winner each time. Each time the tendering process came under scrutiny on account of allegations of misdemeanor and was cancelled. The government then began to explore options for a direct deal with Russia for the manufacture of the Ka-226T in collaboration with HAL under the ‘Make in India’ programme.

The Ka-226T is a light, twin-engine, multi-role, utility helicopter offered by Russian Helicopters with a coaxial, contra-rotating main rotor design which permits compact dimensions. It has a MAUW of 3.6 tonne with internal load and 3.8 tonne with under-slung load and can carry seven passengers or up to 1.05 tonne of cargo in cabin or 1.1 tonne under-slung. The helicopter can fly at a maximum speed of 250 kmph and cruise speed of 220 kmph. It has a maximum flight range of 600 km with main fuel tanks. The operational and hover Out of Ground Effect (OGE) ceilings of the helicopter are 6.1 km and 4.6 km respectively. The Ka-226T model is fitted with updated navigation and automatic control equipment, as well as an interchangeable mission pod, which allows for flexible equipment configurations.

The Ka-226T’s MAUW locates it between the Chetak/Cheetah and the Dhruv and slightly above the LUH that HAL is developing. However, the advantage it holds over the Chetak/Cheetah and the LUH is its twin engine design which is significant from the point of view of survivability in hostile terrain. Its cruise speed of 250 kmph is higher than the Chetak’s which is 185 kmph and its range is 600 km, which is higher than the Chetak’s 500 km. Its fuselage length is just 8.1 metres as compared to the much lighter Chetak which is 10.03 metre long due to the tail boom required to accommodate the tail rotor – a design feature not required in an axial rotor design. The coaxial main rotor system and absence of a tail rotor not only makes it safer on the ground and in the air, but also makes it possible to use the Ka-226T in spaces with scant room for manoeuvre, as the fuselage does not extend beyond the area swept by the rotors. Additional safety is afforded by the rear opening door whose use is uninhibited due to the absence of a tail rotor.

The RSH acquisition process was set into motion by a government-to-government agreement in December 2015 followed by HAL and Russian Helicopters agreeing in October 2016, to form a JV with HAL holding 51 per cent share. According to the contract, the first 60 helicopters will be shipped to India in fly-away condition, whereas 40 additional helicopters will be delivered as kits to India, where they would be assembled at a new HAL facility to be built in the city of Tumakuru for which Prime Minister Modi had laid the foundation stone early last year. Its production capacity will be 75 helicopters a year. The first batch of ten Ka-226Ts is expected to be inducted by the end of 2017. Significantly, the French connection is retained in the Ka-226T deal as the helicopter is powered by two Turbomeca Arrius 2G1 engines.

The Ka-226T deal is a much-needed step towards modernisation of the IAF Light Utility Helicopter fleet although there is some apprehension on account of the fact that the Ka-226T has not been tried and tested over prolonged operations in a Siachin-like environment. Meanwhile, HAL is developing the Light Utility Helicopter (LUH) which is a single engine design in the three-tonne AUW class with a glass cockpit and capable of flying at 220 kmph with a service ceiling of 6.5 km and a range of 350 km with 500 kg payload. HAL’s intent behind this design was to replace the Chetak/ Cheetah fleet with all the four user services. Its design and AUW characteristics are closer to the Chetak/Cheetah family as compared to the Dhruv which is a heavier machine.

Helicopters For Offensive Roles

The only helicopter for an offensive role in the IAF was the Chetak in an Anti Tank Guided Missile (ATGM) role with a French AS 11 wire-guided missile until the Russian Mi-25 was inducted in 1983. The Mi 35, an upgraded version, followed in 1990. In a selection process for the replacement of the ageing Mi-25/35 fleet, Boeing’s AH-64E Apache met all Air Staff Requirements. 22 Apaches were finally ordered after considerable delay, in September 2015 at a cost of Rs 13,951 crore. The Apache is a twin-engine, tandem cockpit, two-man crew machine with a nose-mounted sensor suite for target acquisition and night vision systems. It is armed with a 30 mm M230 chain gun and four hard points mounted on stub-wing pylons, typically carrying a mixture of AGM-114 Hellfire missiles and Hydra 70 rocket pods. It is possibly one of the best attack helicopters in the world. The deliveries of the helicopters are expected to begin in July 2019 and completed by March 2020. However, with a decision having been taken about all future attack helicopters being allocated to the Army, the deployment of just 22 Apaches by the IAF, is of limited value. The procurement of six Apache attack helicopters has been cleared by the government.

For the offensive role, the IAF also has the Mi-17V armed with Shturm-V missiles, S-8 rockets, a 23mm machine gun, PKT machine guns and AKM sub-machine guns. It features eight firing posts for aiming the weapons and its onboard armament allows it to engage enemy personnel, armoured vehicles, land-based targets, fortified posts and other fixed and moving targets. The cockpit and vital components of the helicopter are protected by armoured plates while the aft machine gun position is also fitted with armoured plates to protect the gunner. The helicopter incorporates engine-exhaust Infra-Red (IR) suppressors, a flares dispenser and a jammer and is thus a veritable machine for offensive roles.

Indigenous options for offensive roles are the Rudra and the Light Combat Helicopter (LCH), both from the HAL. The Rudra is the weaponised version of the Dhruv ALH mentioned earlier; it joined service in 2013, and HAL official website projects a final product with a turret gun, rockets, Air-to-Air Missiles, Air-to-Ground Missiles, a Helmet Pointing System, a Data Link, an Infra Red Jammer and an Obstacle Avoidance System. The IAF has ordered 16 and, as the lead agency for integrating air-to-air missiles, is negotiating for the Mistral missile with French missile OEM MBDA. The LCH is being developed by HAL to meet the IAF’s requirement of a dedicated light helicopter for combat operations. It has a narrow fuselage in tandem cockpit configuration and reasonable stealth features, armour protection, night attack capability and crash-worthy landing gear for better survivability. It is also expected to have an Integrated Avionics and Display System (IADS), an IR Suppressor, a 20mm gun, as well as hard points for missiles and rockets. The IAF is expected to get 65. Both these types would add firepower to the IAF’s helicopter fleet but, in terms of payload and performance, will remain far short of the Apache which is inarguably the most lethal attack helicopter in the world today.

Conclusion

Soviet/Russian helicopters (Mi-4, Mi-8, Mi-17 family, Mi-25/35, Mi-26) have made up the majority of IAF helicopter holdings since the 1960s and Kamov Ka-226T is on its way to join its ranks soon. However, the political reality of improving US-India relations is evident in the decision to induct the Apache and the Chinook helicopters at an expected cost of $2.5 to $3 billion. These inductions are expected to be complete by 2020 and will provide adequate and qualitative boost in heavy-lift capability but only a consoling attack capability to be supplemented by as yet unproven Rudra and LCH.

In the medium-lift segment, the IAF has satisfactory number of platforms (Mi-17 V5s) though not in adequate numbers. Hopefully, in the future, older versions of Mi-8s and Mi-17s will get replaced by Mi-17 V5s or even more advanced versions. The Ka-226T, yet to be used extensively in India’s harsh environments, is an acquisition to watch. Should it fail to meet the light utility requirements satisfactorily in terms of payload, performance and reliability, it would be a rude shock for India as the investment in infrastructure would be an irreversible step.

To summarise, the IAF helicopter fleet modernisation is in slow and steady progress. Growth in the economy in the coming years may permit quickening of the modernisation pace and bring the strength up to a level commensurate with the fourth largest position the IAF holds amongst the air forces of the world.