ADA Tejas (LCA) News and Discussions

[ersakthivel]

 

[roma]

with only one back-burner engine ( or is there some backup mechanism ) isnt there a safety hazard if the one and only engine fails ? some jetfighters have multiple if one fails backup measures can be taken albeit with great difficulty ? ? sorry for such a naieve question .....im asking purely out of interest - and declare that ive no knowledge on this topic ( my areas are in org and strategic not aerotech ) but would like to know some ...thanks in advance for your info

 

[ersakthivel]

with only one back-burner engine ( or is there some backup mechanism ) isnt there a safety hazard if the one and only engine fails ? some jetfighters have multiple if one fails backup measures can be taken albeit with great difficulty ? ? sorry for such a naieve question .....im asking purely out of interest - and declare that ive no knowledge on this topic ( my areas are in org and strategic not aerotech ) but would like to know some ...thanks in advance for your info

There are two class of fighters twin engined and single engined,Tejas belongs to single engined variety.Since periodic maintenance is carried out there is no danger in flying them.Of course twin engine fighters have the safety margin, but they are maintenance heavy and very costly ,so all airforces operate both twin engined fighter and single engined fighters.

If we calculate the global accident rates troubles other than engine problem also play a part in a significant number of accidents,
Even sukhois and twin engined Migs too crash. But a twin engined fighter can safely return to base in case of one engine fails , a single engined fighter can't.It is obvious .

 

[rahulrds1]

 

[rahulrds1]

Re: ADA Tejas (LCA) - III

 

[sayareakd]

Is there any difference in dimensions between other tejas PVs and LSP-7 in dimensions?
There is a big bump near the verticlal tail fin.

The below is the picture of another tejas.

Parachute is inside that

http://drdo.gov.in/drdo/pub/techfocus/dec05/recovery.htm

 

[sayareakd]

Re: ADA Tejas (LCA) - III

Is there any difference in dimensions between other tejas PVs and LSP-7 in dimensions?
There is a big bump near the verticlal tail fin.

The below is the picture of another tejas.

Parachute is inside that

http://drdo.gov.in/drdo/pub/techfocus/dec05/recovery.htm

 

[rahulrds1]

RECOVERY PARACHUTE SYSTEM FOR LIGHT COMBAT AIRCRAFT DEVELOPED BY DRDO , [December 2005]

Recovery Parachute System

It is mandatory for a combat aircraft to demonstrate its spin recovery capability during flight test programme. The purpose of this system is to provide emergency recovery of aircraft from an inadvertent spin in case the aircraft controls are ineffective and are unable to pull it out of spin. The recovery is achieved by deployment of a parachute, which applies an anti-moment force at the rear of the out of control aircraft bringing its nose down further. This brings the aircraft into a controlled stabilized dive and helps it to come out of spin/deep stall.
DRDO has developed such parachutes for the flight test of LCA. The test altitude envelope for LCA (9500 kg weight) is 2 km to 12 km. The sequence of operation is as follows:

When a drogue gun is fired, the slug mass of the drogue gun moves rearwards and sequentially deploys the pilot chute at an aircraft wake distance of 23 m. When the pilot chute is stretched, snapping of the weak tie (48 kg) separates the slug mass of the drogue gun along with deployment bag of pilot chute. The chute then inflates and consequently pulls the packed main parachute. As the pilot chute moves rearwards the main parachute deploys sequentially. As soon as the main parachute is stretched, snapping of the weak tie (100 kg) separates the pilot chute and the deployment bag of main parachute. This allows the main parachute to inflate and produce necessary drag force of 32 kN, resulting in a yawing movement of aircraft. It then steepens the flight path angle (a-angle) of the aircraft. The aircraft can then be pulled out of spin by increasing its speed. The total operational time of the system is 3 s. When the aircraft comes out of spin, pilot jettisons the parachute by operating the release mechanism. The system has various redundancy/safety devices. When the release system fails, parachute can be separated through failure of weak link by accelerating the aircraft by 30 per cent.

Development work at sub-system level has been successfully completed and final qualification tests are under progress.

 

[rahulrds1]

Re: ADA Tejas (LCA) - III

RECOVERY PARACHUTE SYSTEM FOR LIGHT COMBAT AIRCRAFT DEVELOPED BY DRDO , [December 2005]

Recovery Parachute System

It is mandatory for a combat aircraft to demonstrate its spin recovery capability during flight test programme. The purpose of this system is to provide emergency recovery of aircraft from an inadvertent spin in case the aircraft controls are ineffective and are unable to pull it out of spin. The recovery is achieved by deployment of a parachute, which applies an anti-moment force at the rear of the out of control aircraft bringing its nose down further. This brings the aircraft into a controlled stabilized dive and helps it to come out of spin/deep stall.
DRDO has developed such parachutes for the flight test of LCA. The test altitude envelope for LCA (9500 kg weight) is 2 km to 12 km. The sequence of operation is as follows:

When a drogue gun is fired, the slug mass of the drogue gun moves rearwards and sequentially deploys the pilot chute at an aircraft wake distance of 23 m. When the pilot chute is stretched, snapping of the weak tie (48 kg) separates the slug mass of the drogue gun along with deployment bag of pilot chute. The chute then inflates and consequently pulls the packed main parachute. As the pilot chute moves rearwards the main parachute deploys sequentially. As soon as the main parachute is stretched, snapping of the weak tie (100 kg) separates the pilot chute and the deployment bag of main parachute. This allows the main parachute to inflate and produce necessary drag force of 32 kN, resulting in a yawing movement of aircraft. It then steepens the flight path angle (a-angle) of the aircraft. The aircraft can then be pulled out of spin by increasing its speed. The total operational time of the system is 3 s. When the aircraft comes out of spin, pilot jettisons the parachute by operating the release mechanism. The system has various redundancy/safety devices. When the release system fails, parachute can be separated through failure of weak link by accelerating the aircraft by 30 per cent.

Development work at sub-system level has been successfully completed and final qualification tests are under progress.

 

[ersakthivel]

But the spin recovery test on tejas has not been completed ,That is one of the reason why it has not reached high AOA level as without validating the parameters of near stall behaviour and post stall recovery of the aircraft MAX AOA and MAX G can't be reached with confidence, SO FBW is restricted to 6g is and flight envelope is opened only till 85 percent.

To conduct this SPIN RECOVERY test ADA is taking consultancy from EADS, not to reduce weight as implied by some members.The weight reduction consultancy was taken for N LCA's landing gear not for air force version.

 

[Ganesh2691]

IAF looking to Induct all Six Squadrons of Tejas by 2022

Indian air force chief in a recent interview to media house has told that , Indian air force is looking to induct all 6 Squadron of Tejas aircraft by 2022 , out of which 4 Squadrons will be of Tejas MK-II aircraft's and 2 Squadron of Tejas MK-I aircraft .

Indian air force will be receiving it first Tejas aircraft's in form of SP-1 and SP-2 next year, Air chief also confirmed revised dates of IOC-II pushed back to mid of 2013 and FOC in 2015 as reported earlier by idrw.org .

IAF expects delivery of all 40 Tejas MK-1 to be done by end of 2016 or early 2017 and Production of Tejas MK-2 to begin in 2016 or early 2017 and complete delivery of 4 Squadrons or 80 aircraft's by 2022 period.

Considering the delays Tejas Program is going through lately, rising of 6 Squadron in less than 9 years is a point in question, HAL has to aggressively start the production of the aircraft's and meet Tejas MK-II deadlines to avoid further delays.

First batch of New GE Engines ordered for Tejas MK-II will start coming to India by last quarter of 2013 and Integration and first flight of Tejas MK-II is expected by end of 2014 or early 2015, sources have informed idrw.org that Larger Team has been re-assigned for the development of Tejas MK-II and the Project will likely gain speed in 2013 and it is expected that first bare air-frame will be ready by next year.

IAF looking to Induct all Six Squadrons of Tejas by 2022 | idrw.org

 

[Ganesh2691]

Re: ADA Tejas (LCA) - III

IAF looking to Induct all Six Squadrons of Tejas by 2022

Indian air force chief in a recent interview to media house has told that , Indian air force is looking to induct all 6 Squadron of Tejas aircraft by 2022 , out of which 4 Squadrons will be of Tejas MK-II aircraft's and 2 Squadron of Tejas MK-I aircraft .

Indian air force will be receiving it first Tejas aircraft's in form of SP-1 and SP-2 next year, Air chief also confirmed revised dates of IOC-II pushed back to mid of 2013 and FOC in 2015 as reported earlier by idrw.org .

IAF expects delivery of all 40 Tejas MK-1 to be done by end of 2016 or early 2017 and Production of Tejas MK-2 to begin in 2016 or early 2017 and complete delivery of 4 Squadrons or 80 aircraft's by 2022 period.

Considering the delays Tejas Program is going through lately, rising of 6 Squadron in less than 9 years is a point in question, HAL has to aggressively start the production of the aircraft's and meet Tejas MK-II deadlines to avoid further delays.

First batch of New GE Engines ordered for Tejas MK-II will start coming to India by last quarter of 2013 and Integration and first flight of Tejas MK-II is expected by end of 2014 or early 2015, sources have informed idrw.org that Larger Team has been re-assigned for the development of Tejas MK-II and the Project will likely gain speed in 2013 and it is expected that first bare air-frame will be ready by next year.

IAF looking to Induct all Six Squadrons of Tejas by 2022 | idrw.org

 

[ersakthivel]

good news at last.

 

[Kunal Biswas]

Old News But Interesting read..

 

[Kunal Biswas]

Re: ADA Tejas (LCA) - III

Old News But Interesting read..

 

[ersakthivel]

Hope the tejas mk-2 progress fast.

 

[ersakthivel]

IAF looking to Induct all Six Squadrons of Tejas by 2022

Indian air force chief in a recent interview to media house has told that , Indian air force is looking to induct all 6 Squadron of Tejas aircraft by 2022 , out of which 4 Squadrons will be of Tejas MK-II aircraft's and 2 Squadron of Tejas MK-I aircraft .

Indian air force will be receiving it first Tejas aircraft's in form of SP-1 and SP-2 next year, Air chief also confirmed revised dates of IOC-II pushed back to mid of 2013 and FOC in 2015 as reported earlier by idrw.org .

IAF expects delivery of all 40 Tejas MK-1 to be done by end of 2016 or early 2017 and Production of Tejas MK-2 to begin in 2016 or early 2017 and complete delivery of 4 Squadrons or 80 aircraft's by 2022 period.

Considering the delays Tejas Program is going through lately, rising of 6 Squadron in less than 9 years is a point in question, HAL has to aggressively start the production of the aircraft's and meet Tejas MK-II deadlines to avoid further delays.

First batch of New GE Engines ordered for Tejas MK-II will start coming to India by last quarter of 2013 and Integration and first flight of Tejas MK-II is expected by end of 2014 or early 2015, sources have informed idrw.org that Larger Team has been re-assigned for the development of Tejas MK-II and the Project will likely gain speed in 2013 and it is expected that first bare air-frame will be ready by next year.

IAF looking to Induct all Six Squadrons of Tejas by 2022 | idrw.org

Well that exposes lot of bullshit slung in this thread by some senior members that mk-1 is a trainer a proto type ,and a couple of mig-21s can wipe out a squadron of LCA and lot more nonsense in this thread.

By 2020 tejas mk-3 with stealth and internal bomb bays will be ready if sensible thought process prevails in MOd-IAF combine.

SO as a fighter line despite all the hues and cries raised against tejas by many forieners,it has proved it's worth to IAf.AS LSP-7 is with IAF for a month.


A comparison of the tejas with mig-21 it is going to replace,

MIG-21
Like many aircraft designed as interceptors, the MiG-21 had a short range. This was not helped by a design defect where the center of gravity shifted rearwards once two-thirds of the fuel had been used.


This had the effect of making the plane uncontrollable, resulting in an endurance of only 45 minutes in clean condition. The issue of the short endurance and low fuel capacity of the MiG-21F, PF, PFM, S/SM and M/MF variants—though each had a somewhat greater fuel capacity than its predecessor—led to the development of the MT and SMT variants.

These had a range increase of 250 km (155 mi) compared to the MiG-21SM, but at the cost of worsening all other performance figures (such as a lower service ceiling and slower time to altitude).

Avionics of MiG-21 Bison consists of Super Kopyo X-band pulse Doppler radar


Air-to-air operating mode

1. Detection range (Ddet), km:

- against free airspace:
head-on >50
in pursuit >30
- against surface background:
head-on >50
in pursuit >25

Single target detection and tracking range 0.75 Ddet .So the tracking range is mind numbing 35 kms, I suppose.

These pathetic ranges are for detection not for tracking I suppose.


With these detection range it can never see an LCA tejas firing a 80 km ASTRA or any other long range missile.

With these specs only squadron of fighters your beloved MIg-21 can wipeout is IJT SITARA sqn.

This is the LCA mk-1's radar specs,

The coherent pulse-Doppler Multi-Mode Radar in development is designed to keep track of a maximum of 10 targets and allows simultaneous multiple-target engagement.

Jointly developed by the LRDE and HAL Hyderabad, the MMR is being designed to perform multi-target search, track-while-scan (TWS), and ground-mapping functions. It features look-up/look-down modes, low/medium/high pulse repetition frequencies (PRF), platform motion compensation, doppler beam-sharpening, moving target indication (MTI), Doppler filtering, constant false alarm rate (CFAR) detection, range-Doppler ambiguity resolution, scan conversion, and online diagnostics to identify faulty processor modules.

While originally planned to be fitted on production aircraft, delays in the development of MMR prompted the DRDO to co-operate with Israel Aerospace Industries to integrate a Hybrid version of the EL/M-2032 radar for use with Tejas.]

The EL/M-2032 radar used in LSP-3 has a detection and tracking range of up to 150 km in air-to-air mode, the air-to-ground mode generates high resolution radar imagery of locations at up to 150 km, and air-to-sea mode can detect and classify naval targets at ranges of up to 300 km.Another track System is an infrared search and track system (IRST)

The mk-2 will have an AESA radar

The LCA sees the mig-21 bisons at 150 km and starts tracking.

At 80 km it will fire the astra-mk-1 that was proposed for it.(mk-2 has 120 km range).

The mig won't see the LCA even when the astra is 10 meters before the nose.



Tejas - Specifications - Powerplant

These are tejas engine specs.

F404-GE-IN20
Dimensions: Diameter 890 mm, Length 3.9 m
Weights: Max Weight 1,035 kg (2,282 lb)
Engines Performance: Thrust 9,163 kg (20,200 lb)

These are the mIG-21 specs

Empty weight: 4,871 kg (10,738 lb)
Gross weight: 7,100 kg (15,650 lb)
Powerplant: 1 × Tumansky R11F-300, 37.27 kN (8,380 lbf) thrust dry, 56.27 kN (12,650 lbf) with afterburner each.


So what kind of spare power MIG-21 will give to avionics and EW suite(is there any?).


At best MIG-21 is a target practice for LCA mk-1.

 

[SajeevJino]

At best MIG-21 is a target practice for LCA mk-1.

Nope we will place our Legendary Mig 21 in our Museams ..

 

[tony4562]

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[tony4562]

Nope we will place our Legendary Mig 21 in our Museams ..

By the time LCA actually ends up in IAF's hands