Aérospatiale SA 315B Lama

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SA 315B Lama
Aerospatiale SA-315B HB-XTM.jpg
An SA 315B Lama over Mt. Lauberhorn
Role General Purpose Helicopter
National origin France
Manufacturer Aérospatiale/Helibras/HAL
First flight 17 March 1969
Introduction July 1971
Retired Chilean Army
Status Active limited service
Primary user Indian Air Force
Developed from Aérospatiale Alouette II

The Aérospatiale SA 315B Lama is a French single-engined helicopter developed to meet hot and high operational requirements of the Indian Armed Forces. It combines the lighter Aérospatiale Alouette II airframe with Alouette III components and powerplant. The Lama possesses exceptional high altitude performance; on 21 June 1972, the type established a helicopter absolute altitude record of 12,442 m (40,814 ft), a record which remained unbroken as of November 2016.

The helicopters have been built under licence by Hindustan Aeronautics Limited (HAL) in India, known as the Cheetah; HAL later developed an upgraded variant, powered by the Turbomeca TM 333-2M2 engine, which is known as the Cheetal. An armed version, marketed as the Lancer, was also produced by HAL. It was also built under licence by Helibras in Brazil as the Gavião.

Design and development[edit]

The SA 315B Lama was originally designed to meet a Nepalese Army Air Service and Indian Air Force requirement for a rotorcraft capable of undertaking operations at hot and high conditions. Both countries possessed extreme mountain ranges in the form of the Himalayas in which even relatively powerful medium-sized helicopters could not be effectively operated within, thus there was an expressed desire for an aerial vehicle capable of operating in this challenging environment.[1] To achieve the desired performance, Aerospatiale elected to combine elements of two existing popular helicopters in their inventory, the Aérospatiale Alouette II and the Aérospatiale Alouette III to produce a new rotorcraft specialised for high altitude performance. Specifically, the new helicopter, named Lama, was equipped with the Alouette III's Turbomeca Artouste turboshaft powerplant and its dynamic systems, and was furnished with a reinforced version of the Alouette II's airframe.[2][1]

On 17 March 1969, the first SA 315B, powered by an Artouste IIB engine, undertook its maiden flight.[1] On 30 September 1970, the type received its airworthiness certificate, and it was introduced to operational service in July 1971. Due to its favourable high altitude performance, the Lama quickly became popular with operators worldwide, often being deploy within mountainous environments.[1] As with the Alouette series, the type can be fitted for various roles, such as light passenger transport, agricultural tasks, oil-and-gas exploration, aerial firefighting, and other specialised duties. The military variants of the Lama include liaison, observation, photography, air/sea rescue, transport and ambulance duties. The SA315B is particularly suited to mountainous areas due to its performance and can carry underslung loads of up to 1000 kg (2,205 lb). By December 1976, 191 Lamas had been ordered by 68 operators.[3]

SA-315B Lama, 2007

A significant number of SA 315B Lamas were manufactured under license in India by Hindustan Aeronautics Limited (HAL), under the name Cheetah. More than three decades after production in India began, HAL was still receiving export orders for the original Cheetah.[4] Along with the Alouette III, the Cheetah was a key product for HAL; experience from manufacturing the type aided in the later development of more advanced indigenous helicopters such as the HAL Dhruv.[5] During the 1990s, HAL proceeded to develop an armed light attack helicopter based upon the Cheetah, which was given the name Lancer.[6][7]

In 2006, HAL proposed a modernised variant to the Indian Army, designated as Cheetal, the principle change of which being the adoption of a modern, more powerful Turbomeca TM 333-2M2 powerplant in the place of the Artouste; HAL promoting the Cheetal's capabilities for operating in high altitude environments, such as the Siachen Glacier. Other improvements include new warning indicates, a cockpit voice recorder, flight monitoring system, artificial horizon, and modernised electronics. In 2006, an initial 10 Cheetals were ordered by the Indian Air Force.[8][9] In February 2013, it was announced that the Indian and Nepalese Armies had signed a 300 crore (~US$55 million) contract for the urgent procurement of a further 20 Cheetals.[9][10]

Operational history[edit]

SA-315B Lama, 2003

The Lama was developed specifically to provide a rotorcraft with exceptional high-altitude performance. In practice, the type found considerable use within regions that possessed extensive mountain ranges, such as South America and India, being capable of lifting loads and deploying personnel in areas that had been previously impossible to have otherwise achieved.[1]

During 1969, a series of early demonstration flights involving the SA315B were performed in the Himalayas; during one such flight, a single rotorcraft carrying a crew of two and 120 kg of fuel landed and then took off at what was then the highest altitude to be recorded, 7,500 m (24,605 ft). On 21 June 1972, a Lama with a single pilot (Jean Boulet) aboard established a helicopter absolute altitude record of 12,442 m (40,814 ft), a record which still stands as of November 2016.[11][1] During the same flight, the Lama's engine flamed out at the peak altitude of the flight, which led to an inadvertent record being set for the longest ever autorotation after which the rotorcraft was brought to a safe unpowered landing.[12][13][1] Days before, the same pilot and aircraft had set a similar record at a higher weight.[14]

Following in the aftermath of the records set by the helicopter, a major order was placed by the Indian government in 1971. The Indian order included an arrangement for the indefinite license production of the SA315B to be conducted by Hindustan Aeronautics Limited (HAL) at their facility in Bangalore, India. The first Indian-assembled SA315B flew on 6 October 1972, with deliveries starting in December 1973; Indian-produced helicopters were given the name Cheetah. Operated by both the Indian Air Force and the Indian Army's Aviation Corps, the Cheetah have proved capable, operating in difficult and remote areas such the mountainous Siachen region, and during times of conflict with neighbouring Pakistan.[4] Cheetahs have also been operated for civil purposes, such as aerial agriculture.[15]

HAL-built Lamas have also been produced by neighbouring Nepal for military use. Sales have included a quantity of an armed variant, marketed as the HAL Lancer; one batch was reportedly delivered to Nepal between June 2003 and September 2004. The sale of Lancers to Nepal encountered international controversy due to allegations that these rotorcraft have participated in combat operations against members of the Communist Party of Nepal during the Nepalese Civil War.[16]

SA-315B Lama, 2003

In addition to India, other countries have participated in licence production activities. In 1978, a export agreement was reached with Brazilian aircraft manufacturer Helibras, under which it would perform domestic assembly of the Lama. Such Helibra-produced SA 315Bs were marketed under the designation Gavião;[17] several examples of which were successfully exported to neighboring Bolivia.

In later life, the Lama's commercial appeal waned in favour of the newer Eurocopter AS350 Écureuil, which had lower maintenance requirements and was capable of higher speeds but incapable of equalling the Lama's high altitude performance.[1] The type remained in commercial service into the 21st century, being only slowly retired as it typically continued to be adequate for its given tasks. According to Vertical Magazine, popular qualities of the Lama included its capable engine, favourable stability while hovering, and its ability to effectively convey payloads at altitude even during peak temperatures.[1]

In 2009, due to issues with the newly introduced HAL Dhruv helicopter, the Indian Army increased operational usage of their older Cheetah/Cheetal rotorcraft to meet the temporary shortfall.[18] In September 2012, it was reported that an ever-decreasing amount of spare parts compatible with the Cheetah has led to the type's operators being required to cannibalise helicopters in order to provide components for others.[19] In August 2016, it was reported that No. 114 Helicopter Unit were keen to introduce the upgraded Cheetal as a replacement for its existing Cheetah rotorcraft for continuous deployment on the Siachen Glacier.[20]

Variants[edit]

SA 315B Lama
Derived from the SE 3150, it was designed for high altitude operations using a 650kW (870shp) Turbomeca Astazou IIIB turboshaft, derated to 410kW (550shp). This derivative still holds the absolute altitude record for all types of helicopters since 1972: 12,442 m.
HB 315B Gaviao
Brazilian license-built version of the SA 315B Lama.[17]
HAL Cheetah
Indian license-built version of the SA 315B Lama.[17]
HAL Lancer
Modified armed combat variant. Changes include composite armouring, toughened glass, and gun sights. Armaments include two jettisonable weapons pods, each of which contains a single 12.7 mm machine gun and up to three 70 mm rockets.[21][22]
HAL Cheetal
Modernised variant, fitted with the Turbomeca TM333-2M2.[23] Speed is increased to 210 km/h (130 mph) and range is increased to 560 km (350 mi).[24]

Operators[edit]

 Afghanistan
 Argentina
A 1990-built Swiss-operated Lama
 Ecuador
 India
 Namibia
 Pakistan
 Togo

Former operators[edit]

 Angola
 Argentina
 Bolivia
 Chile
SA315B Lama lifting off from St Johann im Pongau
 Ecuador
 El Salvador
 India
 Morocco
   Nepal
 Peru

Specifications (SA 315B Lama)[edit]

View of a SA 315B Lama; note the three-bladed main rotor

Data from Jane's All The World's Aircraft 1982–83[37]

General characteristics

  • Crew: 1
  • Capacity: 4 passengers or 1,135 kg (2,500 lb) slung payload
  • Length: 10.24 m (33 ft 7¼ in)
  • Main rotor diameter: 11.02 m (36 ft 1¾ in)
  • Height: 3.09 m (10 ft 1¾ in)
  • Main rotor area: 95.38 m2 (1,026 ft2)
  • Powerplant: 1 × Turbomeca Artouste IIIB turboshaft, 649 kW (870 hp) derated to 410 kW (550 hp) each

Performance

  • Maximum speed: 192 km/h (119 mph)
  • Range: 515 km (320 miles)
  • Service ceiling: 5,400 m (17,715 ft)
  • Rate of climb: 5.5 m/s (1,080 ft/min)

See also[edit]

External video
Footage of SA 315B Lamas performing aerobatic manoeuvres
Video of Lama operations amongst mountainous terrain
A Lama performing several utility flights in the Alps
Related development
Related lists

References[edit]

Citations[edit]

  1. ^ a b c d e f g h i Robinson, Skip. "The Mountain King." Vertical, 17 November 2016.
  2. ^ "Aérospatiale SE 313B Alouette II." Flight International, 17 July 1975. p. 84.
  3. ^ "SA.315B Lama." Flight International, 27 November 1976. p. 1589.
  4. ^ a b "HAL bags $10 mn order for Chetak, Cheetah from Namibia." Economic Times, 10 June 2009.
  5. ^ Kjelgaard 1982, pp. 1772-1773.
  6. ^ "High hopes." Flight International, 15 March 2005.
  7. ^ "Hindustan Aeronautics Limited - Helicopter Division Bangalore: Brief History." HAL, Retrieved: 20 November 2016.
  8. ^ "Cheetal." Hindustan Aeronautics Limited, Retrieved: 30 November 2015.
  9. ^ a b Mathews, Neelam. "HAL’s Cheetal Meets Indian Army’s Urgent Needs." AIN Online, 1 March 2013.
  10. ^ "Army, HAL sign Rs 300 cr deal for 20 Cheetal choppers." Business Standard, 21 February 2013.
  11. ^ ""FAI Record ID #754 Altitude without payload. Class E-1 (Helicopters), turbine." "FAI Record ID #753 - subclass." "FAI Record ID #11657 - Absolute." Fédération Aéronautique Internationale (FAI). Retrieved: 21 September 2014.
  12. ^ FAI Records set by SA-315B
  13. ^ Randall Padfield, R. (1992). "Chapter 8 Autorotation". Learning to Fly Helicopters. McGraw-Hill Professional. p. 151. ISBN 0-07-157724-6. Retrieved 4 November 2010. 
  14. ^ ""FAI Record ID #788 - Altitude without payload. Class E-1c (Helicopters: take off weight 1000 to 1750 kg), turbine." Fédération Aéronautique Internationale (FAI). Retrieved: 21 September 2014.
  15. ^ Kjelgaard 1982, p. 1774.
  16. ^ "The EU Code of Conduct fails to prevent French Helicopters being produced under licence in India and transferred to Nepal." Amnesty International, September 2004.
  17. ^ a b c Chant 2014, p. 348.
  18. ^ Rao, Radhakrishna (15 July 2009). "Indian report slams performance of HAL's Dhruv helicopter". Flight International. 
  19. ^ Matthews, Neehlam, "Spares Unavailability Threatens India’s Aging Helo Fleet." AIN Online, 14 September 2012.
  20. ^ "'Siachen Pioneers' bets on Cheetal helicopters." Brahmand.com, 17 August 2016.
  21. ^ Anantha, Krishnan M. "Army turns to HAL for Lancer supply." Times of India, 3 January 2001.
  22. ^ "Lancer." HAL, Retrieved: 18 November 2016.
  23. ^ "First Flight of the HAL Cheetah Powered by Turbomeca's TM 333 2M2 Engine" Turbomeca, 6 February 2003.
  24. ^ Upgraded HAL Cheetal Helicopters for Indian Army - Armedforces-International.com, December 19, 2012
  25. ^ "Afghan air force receives Cheetal helicopters". flightglobal.com. 28 April 2015. Retrieved 28 April 2015. 
  26. ^ a b c d e f "World Air Forces 2013" (PDF). Flightglobal Insight. 2013. Retrieved 14 March 2013. 
  27. ^ "World Air Forces 1987 pg. 40". flightglobal.com. Retrieved 14 March 2013. 
  28. ^ "World Air Forces 1987 pg. 38". flightglobal.com. Retrieved 14 March 2013. 
  29. ^ "National Gendarmerie SA315". Retrieved 14 March 2013. 
  30. ^ "World Air Forces 2001 pg. 38". flightglobal.com. Retrieved 14 March 2013. 
  31. ^ "Ejercito de chile Alouette II". Retrieved 12 March 2013. 
  32. ^ a b "World Air Forces 1987 pg. 51". Retrieved 2013-03-14. 
  33. ^ "World Air Forces 1987 pg. 60". flightglobal.com. Retrieved 14 March 2013. 
  34. ^ "World Air Forces 1987 pg. 73". flightglobal.com. Retrieved 14 March 2013. 
  35. ^ "World Air Forces 2011 (pdf)" (PDF). flightglobal.com. Retrieved 14 March 2013. 
  36. ^ "World Air Forces 1987 pg. 77". flightglobal.com. Retrieved 14 March 2013. 
  37. ^ Taylor 1982, pp. 50–51.

Bibliography[edit]

  • "Airplane Magazine". 1 (5). London: Orbis Publishing Ltd. 1990: 138. 
  • Chant, Chris. "A Compendium of Armaments and Military Hardware." Routledge, 2014. ISBN 1-13464-668-2.
  • Kjelgaard, Chris. "HAL spools up." Flight International, 18 December 1982.
  • Taylor, John W. R. (1982). Jane's All The World's Aircraft 1982–83. London: Jane's Yearbooks. ISBN 0-7106-0748-2. 

External links[edit]