HAL Tejas | Updates, News & Discussions

[kurup]

Same is case with our cryogenic engine,low t/w,see the t/w of japanese or chinese cryos.

Can you explain this ??

 

[he-man]

Can you explain this ??

Our engine is heavier compared to other nations per unit thrust.

Thats totally normal,as the metallurgy improves we will improve too.
Also we need to get the gas-generator type of cryo too,its more economical than the staged combustion ce-7.5 we currently have.

But isro is one psu that has made us proud

 

[kurup]

Our engine is heavier compared to other nations per unit thrust.

Thats totally normal,as the metallurgy improves we will improve too.
Also we need to get the gas-generator type of cryo too,its more economical than the staged combustion ce-7.5 we currently have.

But isro is one psu that has made us proud

Any figures to prove it ??

 

[gslv mk3]

Also we need to get the gas-generator type of cryo too,its more economical than the staged combustion ce-7.5 we currently have.

Google CE 20.

 

[TimeToScoot]

@jarves, @he-man

I personally think India/DRDO/HAL are doing fine. Rome was not built in a day after all. What were India's achievements 5-7 years ago? No mars mission. No moon mission. No cryogenic engine. No Agni 4-5. No GSLV. and lots more. Before the baby can learn to run it has to learn to walk and I believe we're all way too impatient. India is after all only a $1.8 trillion economy.

But isro is one psu that has made us proud

Go back exactly an year when there was no mars mission and the cryogenic engine was still in the works. Would you have said the same thing? But yes, a lot can change within a year.

 

[jarves]

@jarves, @he-man

I personally think India/DRDO/HAL are doing fine. Rome was not built in a day after all. What were India's achievements 5-7 years ago? No mars mission. No moon mission. No cryogenic engine. No Agni 4-5. No GSLV. and lots more. Before the baby can learn to run it has to learn to walk and I believe we're all way too impatient. India is after all only a $1.8 trillion economy.

I have faith in HAL but if they will fail to achieve FOC by mid 2016 then i will loose it.

 

[sancho]

Something interesting / rather disappointing from the chat between Tarmak007 and Dr K Tamilmani, DG (Aero), DRDO:

Q: What is the total speed of tejas and will it be increased in tejas mk2?I have heard that tejas has speeds of upto mach1.6 ,is it true?

A: We have demostrated 1.6 M in LCA and the it is also the same for MK2

Tarmak007 | Facebook


If the MK2 remains at Mach 1.6 even with the higher thrust engine, it doesn't seems like much progress was achived in countering the weight and drag issues.

 

[he-man]

@jarves, @he-man

I personally think India/DRDO/HAL are doing fine. Rome was not built in a day after all. What were India's achievements 5-7 years ago? No mars mission. No moon mission. No cryogenic engine. No Agni 4-5. No GSLV. and lots more. Before the baby can learn to run it has to learn to walk and I believe we're all way too impatient. India is after all only a $1.8 trillion economy.



Go back exactly an year when there was no mars mission and the cryogenic engine was still in the works. Would you have said the same thing? But yes, a lot can change within a year.

I would have.
There is no comparison between isro and hal/drdo

 

[sudhir007]

Flight update:

From: 2520th flight on 24 Mar
TD1 : 233 PV1: 242 PV3: 381 LSP1: 74 LSP3: 198 LSP5: 252
TD2 : 305 PV2: 222 PV5: 37 LSP2: 294 LSP4: 110 LSP7: 79
NP1: 18 LSP8: 75

To:
2532th flight on 05 April
TD1 : 233 PV1: 242 PV3: 381 LSP1: 74 LSP3: 200 LSP5: 255
TD2 : 305 PV2: 222 PV5: 39 LSP2: 294 LSP4: 110 LSP7: 81
NP1: 19 LSP8 : 77

 

[Black Widow]

Our engine is heavier compared to other nations per unit thrust.
Thats totally normal,as the metallurgy improves we will improve too.
Also we need to get the gas-generator type of cryo too,its more economical than the staged combustion ce-7.5 we currently have.
But isro is one psu that has made us proud

Kaveri

• Length: 137.4 in (3490 mm)
• Diameter: 35.8 in (910 mm)
• Dry weight: 2,724 lb (1,235 kg) [Goal: 2,100-2450 lb (950-1100 kg)]

• Military thrust (throttled): 11,687 lbf (52.0 kN)
• Full afterburner: 18,210 lbf (81.0 kN)

GE404

• Length: 154 in (3,912 mm)
• Diameter: 35 in (889 mm)
• Dry weight: 2,282 lb (1,036 kg)\

• 11,000 lbf (48.9 kN) military thrust
• 17,700 lbf (78.7 kN) with afterburner

Snecma M88

• Length: 3538 mm (139.3 in)
• Diameter: 696 mm (27.5 in) max
• Dry weight: 897 kg (1,977 lb)

• Maximum thrust: 50 kN (11,250 lbf) dry, 75 kN (16,900 lbf) wet (afterburning)

I don't see Kaveri too inferior to a world class engine.. What say others?

Some Chinese engine (Data is given by communists, can't be trust, though I am posting it)

• Length: 4.14 metres (13.6 ft)
• Diameter: 1.02 metres (3 ft 4 in)
• Dry weight: 1,135 kilograms (2,502 lb)

• Maximum thrust: 51.2 kilonewtons (11,500 lbf) dry; 86.37 kilonewtons (19,420 lbf) with afterburner

 

[rockstarIN]

Kaveri

• Length: 137.4 in (3490 mm)
• Diameter: 35.8 in (910 mm)
• Dry weight: 2,724 lb (1,235 kg) [Goal: 2,100-2450 lb (950-1100 kg)]

• Military thrust (throttled): 11,687 lbf (52.0 kN)
• Full afterburner: 18,210 lbf (81.0 kN)

GE404

• Length: 154 in (3,912 mm)
• Diameter: 35 in (889 mm)
• Dry weight: 2,282 lb (1,036 kg)\

• 11,000 lbf (48.9 kN) military thrust
• 17,700 lbf (78.7 kN) with afterburner

Snecma M88

• 
  
  
  • Length: 3538 mm (139.3 in)
  • Diameter: 696 mm (27.5 in) max
  • Dry weight: 897 kg (1,977 lb)

• 
  
  
  • Maximum thrust: 50 kN (11,250 lbf) dry, 75 kN (16,900 lbf) wet (afterburning)

I don't see Kaveri too inferior to a world class engine.. What say others?

Some Chinese engine (Data is given by communists, can't be trust, though I am posting it)

• Length: 4.14 metres (13.6 ft)
• Diameter: 1.02 metres (3 ft 4 in)
• Dry weight: 1,135 kilograms (2,502 lb)

• Maximum thrust: 51.2 kilonewtons (11,500 lbf) dry; 86.37 kilonewtons (19,420 lbf) with afterburner

Its is the weight vs dry thrust that matters.

Kaveri - 1235kg - 52 kN (T.W - 9.4)
404 - 1036kg - 49 kN(T.W - 10.6)
M88 - 897kg - 50 kN (T.W - 12.54)
@sancho

 

[Robinhood Pandey]

Kaveri

• Length: 137.4 in (3490 mm)
• Diameter: 35.8 in (910 mm)
• Dry weight: 2,724 lb (1,235 kg) [Goal: 2,100-2450 lb (950-1100 kg)]

• Military thrust (throttled): 11,687 lbf (52.0 kN)
• Full afterburner: 18,210 lbf (81.0 kN)

GE404

• Length: 154 in (3,912 mm)
• Diameter: 35 in (889 mm)
• Dry weight: 2,282 lb (1,036 kg)\

• 11,000 lbf (48.9 kN) military thrust
• 17,700 lbf (78.7 kN) with afterburner

Snecma M88

• 
  
  
  • Length: 3538 mm (139.3 in)
  • Diameter: 696 mm (27.5 in) max
  • Dry weight: 897 kg (1,977 lb)

• 
  
  
  • Maximum thrust: 50 kN (11,250 lbf) dry, 75 kN (16,900 lbf) wet (afterburning)

I don't see Kaveri too inferior to a world class engine.. What say others?

Some Chinese engine (Data is given by communists, can't be trust, though I am posting it)

• Length: 4.14 metres (13.6 ft)
• Diameter: 1.02 metres (3 ft 4 in)
• Dry weight: 1,135 kilograms (2,502 lb)

• Maximum thrust: 51.2 kilonewtons (11,500 lbf) dry; 86.37 kilonewtons (19,420 lbf) with afterburner

Weight Is the main issue with Kaveri.

 

[narcon]

Something interesting / rather disappointing from the chat between Tarmak007 and Dr K Tamilmani, DG (Aero), DRDO:



Tarmak007 | Facebook


If the MK2 remains at Mach 1.6 even with the higher thrust engine, it doesn't seems like much progress was achived in countering the weight and drag issues.

Because MK2 will have more weight than the present model.

 

[narcon]

 

[Black Widow]

Its is the weight vs dry thrust that matters.

Kaveri - 1235kg - 52 kN (T.W - 9.4)
404 - 1036kg - 49 kN(T.W - 10.6)
M88 - 897kg - 50 kN (T.W - 12.54)
@sancho

Correct, I agree our machine is not upto mark, But its not too much inferior to the counterparts.. Given a chance, it will become one of the best in class...