Aérospatiale SA 315B Lama
| Company type | Company |
|---|---|
| Industry | Aerospace, defense |
| Headquarters | France , France |
Aérospatiale SA 315B Lama is a French single-engine helicopter that merges the lightweight airframe of the Aérospatiale Alouette II with components and the powerplant of the Alouette III, resulting in outstanding performance at high altitudes.
This model has been manufactured under licence in India by Hindustan Aeronautics Limited (HAL) under the name Cheetah. An enhanced variant, known as the Cheetal, features the more powerful Turbomeca TM 333-2M2 engine. HAL also developed an armed version marketed as the Lancer. Additionally, the helicopter was licence-produced by Helibras in Brazil under the designation Gavião.
Design and development
The SA 315B Lama was engineered to fulfill demands from both the Nepalese Army Air Service and Indian Air Force for a rotorcraft capable of operating effectively in "hot and high" environments, such as the Himalayan region, where medium-sized helicopters faced operational challenges. To meet these requirements, Aérospatiale combined the Alouette II’s reinforced airframe with the dynamic components and Turbomeca Artouste turboshaft engine derived from the Alouette III.
The prototype SA315B took to the skies on 17 March 1969, gained its airworthiness certification by 30 September 1970, and entered operational service in July 1971. Its renowned high-altitude capabilities garnered popularity worldwide, particularly in mountainous terrains. The adaptable platform supports various missions including light passenger transport, agricultural applications, oil and gas exploration, aerial firefighting, liaison duties, observation, search and rescue operations, cargo transport, and medical evacuation. It can handle underslung loads up to 1000 kg (2,205 lb). By December 1976, orders had reached 191 units from 68 different operators.
A large number of SA 315B Lamas were produced under licence in India by HAL as the Cheetah. Even decades after initial production commenced, HAL continued to receive export contracts for this helicopter. The Cheetah became a cornerstone product for HAL and provided valuable experience instrumental in developing indigenous helicopters such as the HAL Dhruv. In the 1990s, HAL introduced an armed light attack version based on the Cheetah platform called Lancer.
In 2006, HAL launched an upgraded Cheetal model for the Indian Army featuring the Turbomeca TM 333-2M2 engine optimized for demanding high-altitude conditions like those encountered on the Siachen Glacier. This modernization included enhancements such as new warning systems, a cockpit voice recorder, flight monitoring equipment, an artificial horizon, and updated avionics. The Indian Air Force initially procured 10 Cheetals in 2006. Later in February 2013, India and Nepal entered into a contract valued at approximately ₹300 crore (~US$55 million) for an additional supply of 20 Cheetals.
Operational history
Conceived to excel in extreme altitude environments, the Lama found extensive deployment in mountainous regions including South America and India. It demonstrated capability in transporting personnel and lifting loads to locations previously inaccessible to other rotorcraft.
During early demonstration flights over the Himalayas in 1969, the SA315B exhibited remarkable performance by landing and taking off at altitudes reaching 7,500 meters (24,605 feet). On 21 June 1972, pilot Jean Boulet established an absolute helicopter altitude record of 12,442 meters (40,814 feet), a record that remains unbroken as of 2022. Notably, during this flight, engine flameout occurred at peak altitude leading to an unprecedented autorotation descent which concluded safely without power. Days earlier, Boulet had set a similar altitude record while carrying a heavier load.
Following these milestones, a significant procurement order was placed by the Indian government in 1971 that included indefinite licence production rights granted to Hindustan Aeronautics Limited (HAL) located in Bangalore. The first Indian-assembled SA315B flew in October 1972 with deliveries starting December 1973. These locally produced units were designated Cheetah and operated extensively by both the Indian Air Force and Army Aviation Corps. The Cheetah proved its effectiveness in demanding environments such as Siachen and during conflicts with Pakistan. It also found civilian applications including aerial agricultural operations.
HAL-manufactured Lamas were exported to Nepal for military purposes; this included deliveries of an armed variant known as the HAL Lancer. Deliveries made between 2003 and 2004 became controversial due to reports alleging their use against Maoist insurgents during Nepal’s civil conflict.
Outside India, Brazilian company Helibras assembled Lamas under licence starting from 1978 under the name Gavião, with some units subsequently exported to Bolivia.
Over time, commercial demand for the Lama diminished as operators favored alternatives like the Eurocopter AS350 Écureuil which offered advantages such as reduced maintenance costs and higher speed but lacked comparable high-altitude performance. Nevertheless, due to its dependable engine, stable hovering characteristics, and efficient payload handling at elevation, the Lama maintained commercial service well into the twenty-first century.
In 2009, after encountering operational challenges with HAL’s newer Dhruv helicopter model, the Indian Army increased reliance on older Cheetah/Cheetal helicopters to compensate for shortfalls. By 2012 spare parts scarcity forced operators to cannibalize existing helicopters for components. In August 2016, India’s No. 114 Helicopter Unit expressed interest in upgrading its fleet to Cheetal variants as replacements for existing Cheetahs to ensure continuous deployment capability on the Siachen Glacier.
Variants
- SA315B Lama
- Developed from the SE 3150, this model is optimized for operations at high altitudes and powered by a 650kW (870hp) Turbomeca Astazou IIIB turboshaft engine, which is limited to 410 kW (550shp). It has maintained the absolute helicopter altitude record since 1972, reaching 12,442 meters.
- HB315B Gaviao
- The SA 315B Lama produced under license in Brazil.
- HAL Cheetah
- Indian-manufactured version of the SA 315B Lama under license.
- HAL Lancer
- A combat-oriented version featuring composite armor, reinforced glass, and gun aiming systems. It carries two detachable weapons pods, each armed with a 12.7-mm machine gun and up to three 70-mm rockets.
- HAL Cheetah (upgraded)
- An Indian variant equipped with the Turbomeca TM333-2M2 engine tailored for high-altitude missions. This upgrade enhanced speed to , extended range to , and allows a payload capacity of at altitude with an endurance of 3.5 hours. It includes FADEC engine management, an Electronic Backup Control Box, advanced cockpit instrumentation such as an electric artificial horizon, directional gyro, flight monitoring system, cockpit voice recorder, and a master flasher warning system. Its maiden flight was in January 2003. It set a record for the highest helicopter landing at 7,070 meters in the Himalayas on 2 November 2004. The Indian Air Force placed an order for 10 units in 2006, followed by the Indian Army ordering 20 in 2013—all have been delivered.
Operators
Former operators
- Ecuadorian Air Force
- Ecuadorian Army Withdrawn from service on 22 January 2025
Bibliography
- Chant, Chris. "A Compendium of Armaments and Military Hardware." Routledge, 2014. .
- Kjelgaard, Chris. "HAL spools up." Flight International, 18 December 1982.