HAL Advanced Light Helicopter Dhruv

Discussion in 'Indian Air Force' started by s_bman, Mar 1, 2009.

  1. StealthSniper

    StealthSniper Senior Member Senior Member

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  2. AJSINGH

    AJSINGH Senior Member Senior Member

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    even Jordan is intested in dhruv ,one of one my friend in jordan stratregic studies departmenttold me about that
     
  3. nitesh

    nitesh Mob Control Manager Stars and Ambassadors

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    ALH all the way guys, only guessing now what's in store for LCH

     
  4. marcos98

    marcos98 Regular Member

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    TWO MORE ALH DHRUV FOR ECUADOR
    Ecuador's Defence Minister Javier Ponce is expected in India shortly on an official visit to sign a few defence agreements with the country. Among them will be Ecuador exercising its option to buy two more Indian ALH Dhruv helicopters, taking its Dhruv fleet to nine choppers. Earlier this year, the Ecuadorian Air Force (Fuerza Aérea Ecuatoriana) purchased seven Dhruvs for the logistical role, including one kitted out as a VIP transport for the country's President. The fleet is currently based in the military area of José Joaquín de Olmedo International Airport in Guayaquil, in the heart of Ecuador.
    great going dhruv......
    LiveFist - The Best of Indian Defence: Two More ALH Dhruvs For Ecuador!
     
  5. nitesh

    nitesh Mob Control Manager Stars and Ambassadors

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  6. p2prada

    p2prada Stars and Ambassadors Stars and Ambassadors

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    Remember IA's deal for 197 light helicopters was canceled last year because Bell decided to leave due to some bribery case. The new RFP has not been announced as of date.
     
  7. RPK

    RPK Indyakudimahan Senior Member

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    LiveFist - The Best of Indian Defence: SPECIAL: Dhruv Shakti In Siachen

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    By Group Captain Hari Nair
    Flight Ops (Rotory), HAL

    It is the raison d’être for the Advanced Light Helicopter (Dhruv) with Shakti engines, and the very mention of the mission starts the adrenaline rush in a helicopter pilot.

    Picture the stark landscape of the Siachen Glacier comprising just three colours: the Brown of the craggy mountains with peaks so sharp that they resemble fangs, the almost alien dark Blue of the high-altitude sky, and the dazzling White of the perennial ice cover. Then throw in a stupefying mix of high-air temperature and rarified atmosphere, add a postage stamp-sized helipad situated between deep ice crevasses at a geographical elevation of 5,940m (19,480 ft). The mission is to land on that postage-stamp helipad at a temperature of ISA+20 (-5°C), hover the helicopter Out of Ground Effect (OGE) with 200 kg of load and fuel for one hour of flying plus 20 minutes of reserve.

    To add a further bit of spice as if all this were not enough, there are also tactical considerations in the approach and getaway due to extreme proximity of the helipad to a very ‘friendly’ neighbour on the west. Simply impossible you say? Well you were right — up to now that is. Demonstration of the mission was well beyond the performance envelope of most helicopters and in fact it was one of the reasons for development of the Lama (Cheetah) helicopter from the Alouette-III (Chetak) in the 1970s.

    Although the Cheetah manages some payload in the hot summer months,it is unable to meet the above mission requirement. Also, its payload drops significantly in ISA+20 conditions at that altitude. The mentioned mission requirements appear beguilingly simple — however at those stated conditions, everything (aerodynamics, engine performance, control margins, handling and stability) tapers off to a point, usually well short of the target for most helicopters.

    It is not just about additional power from powerful engines. There are helicopters that can fly at the required altitude. However, they invariably are at the limits of control margins, stability and handling due to their conventional hinged rotors, and therefore are practically not suited for such missions in the harsh flying environment which is invariably accompanied by extreme turbulence. Also, the technical trick is to translate the additional power available from the more powerful (but invariably heavier) engines into rotor thrust and still have a useful margin of payload. Usually, at that altitude, the power required by conventional rotor systems to hover with useful payload and fuel rapidly outstrips the power available from most turbine engines.

    So, it is that sort of a target that would make most helicopter designers and test pilots frown, shake their heads and mutter darkly under their breath —“elusively out-of-reach and quite simply impossible”. However, the ALH was designed to stringent manoeuverability requirements specified by the IAF and Indian Army. Some of its capabilities are routinely demonstrated by the Sarang Display Team. In fact when various combinations of manoeuvres were initially tried out by this scribe as a former team-member to define the display manoeuvre sequences, there were always generous margins available on all controls.

    The ALH’s highly manoeuverable rigid rotor system has some beneficial spin-offs at high altitude — good control power, good control margins and easier handling for pilots. The typical high-altitude sluggish handling and inertia in other helicopters is absent in the ALH. The controls remain crisp, with adequate control margins and good stability. The only compensation on approach to a helipad is to cater for the higher True Air Speed (TAS) and reduce the IAS appropriately at an earlier point.

    On 11 Aug 2009, at 0750 hrs, the shrill whine of two escorting Cheetah helicopters mixed with the deeper roar of the ALH’s Shakti engines broke the morning silence on the glacier as the ALH-Shakti made an approach to the helipad.

    The observed temperature was between -1°C and0° C (ISA+22) and Wg Cdr (Retd) Unni Pillai (Chief Test Pilot (RW), HAL) was at the controls with Lt Col T. Srinivas. The two experimental test pilots wereintensely focused on the difficult approach, which under the best of conditions usually approaches near white-out condition.

    This was the beginning of the culmination of years of hard work by the dedicated team of designers, who had toiled hard to achieve the ‘impossible corner point’. They had strived to achieve the near-perfect mix of carefree handling of the ALH’s rigid rotor system with abundance of power from the Shakti engines at extreme altitudes. While ‘Srini’ called out the approach and reserve power parameters, Unni manipulated the controls and brought in the ALH to a hover over the tiny helipad.

    On the approach, the ALH hadan equivalent mission payload of175 kg on-board. Unni brought in the ALH to a low hover, pulled up into a hover OGE, while Srini checked the power and other margins. After the sit-down, personnel from the post loaded upthe helicopter with an additional 160 kg and the crew pulled up the ALH to hover OGE above 12m (35 ft) on radio altimeter.

    The hover was a tricky exercise — too low and they would be ‘in Ground Effect’ which would affect the accuracy of the test, and if too high, the crew would lose sight of the tiny helipad under the helicopter’s nose and would enter white-out. The crew observed the power margins and carried out a second sit-down. Another 80 kg was added and the ALH was hovered OGE for the third time. The power margin was adequate and so the crew carried out another sit-down and added a further 240 kg. The ALH was picked up for the fourth hover OGE. At that point, after catering for fuel burn during the successive hovers, the ALH had an equivalent of 619 kg of mission payload on-board, with fuel for one hour plus 20 minutes of reserve.

    It was best summarised by the marshaller at the post who gave the thumbs-up to Unni and Srini, walked up to them after the last hover andy elled to them above the noise of the engines and rotors: “Jhahaz mein bahut dum hain (the craft has plenty of power)!” The ALH-Shakti had gone well beyond the mission requirement of 200 kg of load and had beaten the dreaded ‘corner point’.

    It was an elated team of designers lead by Ms Rama Bhat who received thehelicopter back at Leh. The Chief Aerodynamist Mr Girish who had been into serious number-crunching into the late hours, notwithstanding the rarified atmosphere of Leh was especially happy since the performance had been as predicted. The team had also been supported very well on-site by representatives of the certification and inspection authorities. Team ALH-Shakti had proved true the ALH slogan — Any Mission, AnyPlace, Any Time.

    (Gp Capt Nair flies for HAL's Rotory Wing Flight Ops team. He was commissioned in the helicopter stream of the IAF in December 1983. He has been associated with the Dhruv (ALH) programme, and commanded a combined Chetak-Cheetah unit in the Western Sector. He formed and commanded the Sarang Helicopter Display Team comprising Dhruv helicopters, during 2003-2005. He served as Chief Operations Officer, in an IAF base in the North-East)
     
  8. Parashuram1

    Parashuram1 Regular Member

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    I don't think arming an Arab country would be of interest to Indian politics in any way since this would strain its close ties with Israel, which also operates the Dhruv.

    Apart from that, India must also remember another major fact that all the Arab nations support Pakistan's stand on Kashmir and none support India's Kashmir position. Therefore, a lot of things have to be looked upon when considering arming a country that is rival to an already best friend of Delhi and at the same time has vested interests in weakening Indian interests in front of the world.
     
  9. wild goose

    wild goose Regular Member

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    Hi,

    Egypt and Jordan are the only countries in middle east that recognises Israel. So they won't be worried about Dhruvs. And it will no way cause a strain.
    Did Israeli help or support to China in J10 fighter program strain Indo-Israeli ties?

    Moreover, by selling a few Dhruvs(if at all Jordan buys) India is not 'arming' them. It is a recognition for Dhruv, because Jordan can easily get any of the Western choppers they wish for.

    It should be taken as a pure business initiative rather than dragging Kashmir into it.
     
  10. Sridhar

    Sridhar House keeper Moderator

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    Ecuador: Helicopter crashes during military ceremony|Momento 24

    Ecuador: Helicopter crashes during military ceremony

    Posted on27 October 2009 at 22:33. Tags: accident, air force, ceremony, chopper, correa, Ecuador, firemen, helicopter, india, quito, rafael
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    An Ecuadorean air force helicopter has crashed during a military parade in Quito, after a fire was reported in the back end of their aircraft.
    Air Force officials said two people were on board the Dhruv helicopter when it came down. Neither was seriously injured.
    Eye witnesses said the aircraft was flying in military formation when a fire began in the back portion of the helicopter, and it started to spiral toward the ground.
    Firemen arrived at the scene immediately and put out the flames.
    The accident took place as soldiers celebrated the 89th anniversary of the Ecuadorean Armed Forces.
    The helicopter is one of seven that Ecuador obtained from India last year for $45.2 million.
    As a result of the accident, the government has suspended the use of the remaining six helicopters of this type in the country which includes the one used by Ecuador’s President Rafael Correa.
     
  11. Sridhar

    Sridhar House keeper Moderator

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  12. RPK

    RPK Indyakudimahan Senior Member

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    Equador helicopter crash news-Dhruv chopper crashes during military parade in Equador

    Quito (Equador): An Indian-made Dhruv helicopter crashed during a military parade injuring its two pilots and prompting authorities to ground another six recently purchased Dhruv choppers.

    The helicopter was flying in formation with two other choppers over an air force base near Quito yesterday when it suddenly veered off course and slammed to the ground, witnesses said.


    "The two crew members managed to get out by their own means and were taken to hospital. Their condition is apparently good," air force general Leonardo Barreiro told reporters.

    He said the chopper was destroyed in the accident, which is under investigation. The crew members were both trained in India.

    The remaining six Dhruv helicopter bought from India six months ago for USD 45 million "have been grounded for the moment until the investigation is finished," the presidential office said in a statement.

    The helicopters include one used by President Rafael Correa.

    Bureau Report
     
  13. indian_blues

    indian_blues Regular Member

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    Probably because of bad maintenance? still a serious blow to marketing dhruv. :(
     
  14. p2prada

    p2prada Stars and Ambassadors Stars and Ambassadors

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    Sabotage also cannot be ruled out or faulty parts.
     
  15. roma

    roma NRI in Europe Senior Member

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    Ecuador suspends Indian-built helicopters

    Ecuador suspends Indian-built helicopters


    An Indian-built Dhruv, or Advanced Light Helicopter, has crashed at a military parade in Quito, Ecuador. Both the pilots of the helicopter are safe.

    The helicopter was one of seven sold by Hindustan Aeronautics Limited (HAL) to the Ecuadorian Armed Forces for 45 million dollars. As a result of the accident, the government has suspended the use of the remaining 6 helicopters, which includes the one used by Ecuador's President, Rafael Correa.

    The helicopter crashed as Ecuadorean Armed Forcese were celebrating their 89th anniversary. Eye witnesses said the aircraft was flying in military formation when a fire began in the back portion of the helicopter and it started to spiral toward the ground. Firemen arrived at the scene immediately and put out the flames.


    Any follow-up info ?
     
  16. amitkriit

    amitkriit Senior Member Senior Member

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    IAF and Army are already using these helicopters in large numbers, can we get performance report of these platforms in Indian hands? Can it be so that Ecuador faltered on maintenance, and hence the incident?
     
  17. Koji

    Koji New Member

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    If you combine the IAF, Navy, and Coast coard, the total number of Dhruvs is approximately 50. That's a relatively low number and they're pretty new. I don't know how much data has been compiled.
     
  18. Rahul Singh

    Rahul Singh Senior Member Senior Member

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    Tragic incidents are not leaving ALH. I believe, it's a perfectly safe machine to fly with and the incident could be called minor. BTW, any info on how bad the crash was? Is chopper repairable or it has been written-off?
     
  19. Rahul Singh

    Rahul Singh Senior Member Senior Member

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    It's in service for over 5 years and sufficient should be available.....

    I think HAL needs to rush some of it's engineers to Equador immediately .
     
  20. Koji

    Koji New Member

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    HAL has a team of 10 based in Quito. They are already on site.
     

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