GTRE GTX 35VS Kaveri

Kattar said:
Very good speech by DRDO scientist - Dr. Subrata Das . He didn't go into specifics and that maybe deliberate

# Four categories related to Engine Development- 1. Design & Technology. 2. Material & Manufacturing. 3. Quality, Reliability, Certifications, Life cycle testing etc. 4th is LRUs related to engine

# Breakdown of development cost - 40% Material, 30-35%, Manufacturing, 20-25% Sub-systems / LRUs

# When people talk of TOT, CKD, SKU, it only covers above 3. Nobody gives Design & Technology

# When Kaveri program started nothing was available - Design Tools, simulation or analysis tools, Material Characteristics Data. All had to be developed independently

# None of engine producers in country who have got so called ToT have got competence in the Design & Technology. It is available to the country now only because of Kaveri program (In short, they are doing screw-driver-giri only and have no autonomy)

# We’ve developed 35-40 material & manufacturers across country through Kaveri program.

# We now have 80-85% of required capability for Aero Engines locally i.e except in one or two areas

# Indian Engine will be on a Indian Aircraft in application role in two years

# We have some deficiencies in test facilities which has been presented in detail in many forums in many ways. So won’t speak of that here

# At GTRE. we have 5 test beds and all 5 are occupied 365 days a year. Two additional test beds for upto 130 KN coming up near Bengaluru

# When we have to integrate we got stuck although it is only 20% value., we had to go reverse engineer everything including lubricants, fuel systems etc

# All systems have gone through all sorts of test and certifications and will be seen flying in couple of years as we have ensured reliability & quality

# Contemporary Technologies such as BLISK, BLINK & Thrust Vectoring should be aimed for now. This needs co-ordination and integrated planning between Design agency like DRDO, certification agencies, user & industry. Unless this is done, we cannot be truly atmanirbhaar in Aero engines for next 20-30 years
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Dr. Subrata Das clarifies that only plan now if for Kaveri Dry Thrust. Kaveri will not be integrated with LCA. GTRE has submitted plan for High thrust engine for AMCA but is upto GoI

GTRE is trying to help develop Indian companies with manufacturing high end components such as Turbines etc as agencies like HAL have faced issues despite receiving so called ToT
 
londonparistokyo said:
If they can get the underpowered version into an LCA as a test they can iterate it to the correct powered version. That is how technology is developed. If they take this seriously, I believe they will have it within 5 years.
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Indeed,
Once you have an indian engine that works, you will be ready to improve it small step by small step.
a real ait test bed will give you much more datas that a ground one.
It will take time, but the goal is on the horizon.
 

View: https://x.com/Defencematrix1/status/1889594628464152845
Kaveri in house
( the version Godrej I'd making that will go into ghatak will have make max sustained dry thrust of 48kn)

Max dry thrust-52kn.


Max wet thrust-81kn.

F404-"IN20" engine, used in the Tejas

Max Dry Thrust: ~53.9 kN ( 3.6% more than Kaveri inhouse)

Max Afterburning (Wet) Thrust: ~85 kN( 4.71% more than Kaveri in house).


F404 in20 ( with after burner)- 1180kg.
Last know weight of Kaveri( with after burner)- aproxc 1180kg.
So almost same weight.
But if we go by twr of 7.8 in booklet weight of Kaveri comes down to :- 1059kg( with after burner), which Is 10.26 percent lighter than f404 in20.



f404 in20 is barely enough for tejas, meaning tejas is slightly above being underpowered with this engine.
It will be slightly underpowered with Kaveri, if one with inhouse test no. Is fitted.

Godrej is making a weaker afterburner for thrust upto 75kn as jets use dry thrust most of the time, and it's for testing purpose.
 
randombully said:

View: https://x.com/Defencematrix1/status/1889594628464152845
Kaveri in house
( the version Godrej I'd making that will go into ghatak will have make max sustained dry thrust of 48kn)

Max dry thrust-52kn.


Max wet thrust-81kn.

F404-"IN20" engine, used in the Tejas

Max Dry Thrust: ~53.9 kN ( 3.6% more than Kaveri inhouse)

Max Afterburning (Wet) Thrust: ~85 kN( 4.71% more than Kaveri in house).


F404 in20 ( with after burner)- 1180kg.
Last know weight of Kaveri( with after burner)- aproxc 1180kg.
So almost same weight.


f404 in20 is barely enough for tejas, meaning tejas is slightly above being underpowered with this engine.
It will be slightly underpowered with Kaveri, in one with inhouse test no. Is fitted.

Godrej is making a weaker afterburner for thrust upto 75kn as jets use dry thrust most of the time, and it's for testing purpose.
Click to expand...

F-404 isn't flat rated , Kaveri is. Consider dry thrust of Kaveri as 60 KN at same parameters as for ratings given for F-404 & wet thrust at 90 KN.
 
Azaad said:
F-404 isn't flat rated , Kaveri is. Consider dry thrust of Kaveri as 60 KN at same parameters as for ratings given for F-404 & wet thrust at 90 KN.
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If that's true then why isn't thus being integrated in Tejas at fast pace for testing?
Specially after delay of f404 for more than a year?
Kaveri has completed ground and aerial test with ill76 succesfully
 
randombully said:
If that's true then why isn't thus being integrated in Tejas at fast pace for testing?
Specially after delay of f404 for more than a year?
Kaveri has completed ground and aerial test with ill76 succesfully
Click to expand...
Because it's not been flight tested except for the FTB & from what I understand they're planning on testing only the Dry Version of the KDE aboard the LCA as of the present meaning in the next 2-3 years.

If those tests turn out to be successful , they'd mate the AFB onto it & carry out further tests. Can't vouch for the veracity of this news as it doesn't make sense given the dry version of the KDE is going on board the Ghatak which should also fly in 3-4 years from now.
 
Azaad said:
Because it's not been flight tested except for the FTB & from what I understand they're planning on testing only the Dry Version of the KDE aboard the LCA as of the present meaning in the next 2-3 years.

If those tests turn out to be successful , they'd mate the AFB onto it & carry out further tests. Can't vouch for the veracity of this news as it doesn't make sense given the dry version of the KDE is going on board the Ghatak which should also fly in 3-4 years from now.
Click to expand...
Means one more modi term required, i dont think other party will support this.
 
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