HAL AJT-39 Combat Trainer

Discussion in 'Indian Air Force' started by agentperry, Oct 24, 2011.

  1. agentperry

    agentperry Senior Member Senior Member

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    The HAL HJT 39, aka CAT (Combat Air Trainer), is an Advance Jet Trainer (AJT) project proposal by Hindustan Aeronautics Limited (HAL) for the Indian Air Force. HAL HJT 39 CAT Programme was Announced at Aero India, February 2005, with Mockup of front fuselage and cockpit shown. It is Projected to fly within three and a half years of go-ahead with airframe and engine commonality with HAL HJT-36 Sitara, avionics comparable with those of HJT-36 and HAL Tejas. The project is currently at the advanced design stage.


    Design

    CAT is Planned as a twin engine transonic “Lead in Fighter Trainer” (LIFT) with a very substantial ground attack capability with a maximum speed of 1,000 km/hr.
    CAT features Multi Functional Dials (MFD) for tactical avigation, Radar Warning Receiver (RWR) and indigenous CSIO/BEL-developed Head Up Display (HUD) and Up Front Control Panel (UFCP), used on the LCA. The HUD would display both navigation and weapon aiming. CAT also features redundancy features like stand by instrumentation system, Fly-by-Wire (FBW), hands-on-throttle-and-stick HOTAS), INS along with GPS receiver, flight control computer and display processor. The avionics would be confirming 32-bit dual mil 1553B Bus Standard.
    The FBW planned consist two digital channels and one engine analog channel. Full Authority Digital Engine Control (FADEC) will be implemented for better handling. Some other features of the modern cockpit are automatic pressure cabin and temperature control systems, zero / zero ejection seat and crew emergency escape system. Radar are optional, but a new radar are to be developed.
    [edit]Airframe
    Among the prominent External design features revealed are a moderately-swept wing, with no wing-body blending or wing root strakes, a prominent vertical fin. The low wing sweep will give a good low-speed performance and excellent handling characteristics essential for the trainer role. The wing will also have a clean leading edge, while having high-lift devices on the trailing edge, for good runway performance. The HJT-39 will be an all-composite aircraft.
    [edit]Cockpit
    CAT is Planned to have tandem seat configuration which lets the trainee sit in the Front Cockpit with considerable stagger between the front and rear seats.The cockpit is designed in such away that the vision for both the occupants is the maximum. The trainer has a bird’s eye view of the trainee’s action and controls. The cockpit will a state of the art glass cockpit having Head up Display (HUD), Head down instruments and weapon aiming controls. The Ergonomics of the cockpit is another key feature of the CAT.
    [edit]Engine
    In view of the ground attack requirements, it will be powered by two NPO Saturn AL-55 turbofans of 2,200 kg thrust each, compared to the 1,800 kg thrust of the variant for the single-engined HJT-36 intermediate jet trainer
    [edit]Armament
    CAT features 5 hard points.The external stores with practice bombs, rockets, missiles and a gun in central fuselage.
    The maximum take off weight with external stores ia projected as 9,500kg. The HJT-39 will also have a virtual training capability, with radar simulation, computerised training aids and the like. An item of optional equipment for the HJT-39 is an On-Board Oxygen Generation System (OBOGS).
    HAL plans to deliver a prototype in 39 months after the clearance from the government with the project cost of Rs 750 crore. (2005)


    but this thing is quite old and dont know IAF is mulling it or not. please shed some light on it.
     
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  3. agentperry

    agentperry Senior Member Senior Member

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    Revisiting Indian Combat Air Trainer project

    By P. Chacko Joseph | August 2nd, 2008 | Category: Opinions and Articles | 2 comments
    Indian aviation has benefited from the years of advanced aerospace research associated with Light Combat Aircraft (Tejas). Tejas testing have qualified all parameters required for development of any modern aircraft. This was verified by the fact that the Prototype Intermediate Jet Trainer (IJT) was developed in 36 months from the conceptual stage. IJT is currently under testing and is expected to enter IAF. It was only logical that Indian Aerospace tried the creation of the Advanced Jet Trainer (AJT) designated as “Combat Air Trainer” (CAT) or Hindustan jet Trainer – 39 (HJT-39).


    Combat Air Trainer Mock up at Aero India 2005

    CAT was a twin engine fully digital AJT designed in view of training pilots in the rapidly changing aircraft technologies to be introduced in IAF in future. CAT was a transonic “Lead in Fighter Trainer” with a maximum speed of 1,000 km/hr. The cockpit was a state of the art glass cockpit having Head up Display (HUD), Head down instruments and weapon aiming controls.
    The HUD would display both navigation and weapon aiming. CAT features Multi Functional Dials (MFD) for tactical navigation, Radar Warning Receiver (RWR) and other uses. CAT featured redundancy features like stand by instrumentation system, Fly-by-Wire (FBW), HOTAS, INS along with GPS receiver, flight control computer and display processor. The avionics would be confirming 32-bit dual mil 1553B Bus Standard.


    Trainee / Front Cockpit

    The FBW planned had two digital channels and one engine analog channel. Full Authority Digital Engine Control (FADEC) will be implemented for better handling. Some other features of the modern cockpit were automatic cabin pressure and temperature control systems, zero / zero ejection seat and crew emergency escape system. Radar was optional, but a new radar was to be developed.
    The maximum take off weight with external stores projected was 9,500kg. The external stores are practice bombs, rockets, missiles and a gun in central fuselage. CAT featured 5 hard points.


    Instructor / Rear Cockpit

    CAT had tandem seat configuration lets the trainee sit in the Front Cockpit. The control surfaces were planned with carbon composites and rest of the aircraft will be made of metal.
    In a training environment trainer and trainee need a holistic view of the environment. The cockpit was designed in such away that the vision for both the occupants is the maximum. The trainer has a bird’s eye view of the trainee’s action and controls. The ergonomics of the cockpit is another key feature of the CAT.

    The Hindustan Aeronautics Limited (HAL) proposed design of CAT underwent the Indian Air Force air staff requirement (ASR) evaluation in 2005. HAL planed to deliver a prototype in 39 months after the clearance from the government. The first prototype was expected to roll out in 2009-2010. A notable remark was that all avionics and design is indigenous.
     
  4. Adux

    Adux Senior Member Senior Member

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    It is stupid for the Indian Airforce to go for HAL products.
     
  5. A chauhan

    A chauhan "अहिंसा परमो धर्मः धर्म हिंसा तथैव च: l" Senior Member

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  6. Adux

    Adux Senior Member Senior Member

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    I hope Indian Airforce standardize on the Hawk or any other option that is suitable for the role. HAL's has to be shown that Indian Airforce is not a stupid organization and that it cannot be a dumping ground, just because HAL is a PSU.
     

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