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If rhenium was the bottleneck, there was no reason for DRDO to even try and develop SCB. Why did they even bother? Also, USA does not have a veto on the world's Rhenium. We can get it from Chile, Peru or Kazakhstan. And even if they can block sales of Rhenium like they did to China, that does...

They have. 2nd gen SCB AFAIK. I am not sure why the article says that Kaveri is using DS blades. Its still using DS blades?

Hopefully Kaveri flies in Tejas for Aero India.

GE 404 that is being used on Tejas has 2nd gen single crystal blades. When the GE 404 first came, it had first generation single-crystal blade. See source: (https://www.flightglobal.com/FlightPDFArchive/1991/1991 - 0980.PDF). The GE404 being used now in Tejas has newer tech including a new hot...

Never said that. Read the line that set me off. The French want(ed?) to form a JV which would "control all future jet engines made in the country". This is what I spoke against. I would feel bad if Kaveri was "saffranized" and put on Tejas. But it would still be bearable. But if the French lay...

The only reason why we are talking of a "Saffranized Kaveri" is 'cause its better to have an engine of which some parts are built in India fitted into Tejas. The alternatives are American built F-414. But let us not forget, "Saffranized Kaveri" is nothing but a stop-gap. The Indian fighter jet...

Sorry, I mistyped it as 2nd gen. I meant 3rd generation DS blades have Rhenium. Its written in that same document. Rare Earths OK. But Rhenium???:confused1: Kaveri is not a gonner. Even if the Safran tie-up falls apart, the effort is too close to success to be be given up. Rest assured, even...

Then WTF does it mean? I would agree if you would have said: "Being self-sufficient does not mean that you have to make every piece". But every key piece must be made in-house. The superalloys without Rhenium are used in first generation SCB. Look at the tables on pages 996 and 997 of your...

AFAIK, F-404 has 2nd gen SCB. F-414 has 3rd gen SCB. Not sure about Al-31. I think it has 1st gen SCB. Every increase in generation of SCB yields a roughly 100 Kelvin Celsius increase in TET. Coatings give upto a 300 Kelvin increase. You cannot substitute one with the other though. After 1st...

The same coating is not being used on Kaveri though. Its a different, more advanced coating that is being used (or is being planned). Otherwise, the DRDO scientist would not have highlighted this as an issue. I just hope they have surmounted the thermal barrier coating issue. We are already...

All that proves is that HAL has the ability to coat Al-31 turbine blades. Where does it say that coatings are a substitute for Rhenium? Where does it say that Kaveri's coatings are already achieved? DRDO already has 2nd generation SCBs. How do they have that without Rhenium? About the thermal...

^This is the image you posted. It mentions in point number 8: "Special furnaces for coating the engine parts". No mention of coating of Turbine blades. If you cannot post a proper source, don't post at all. Once Kaveri is flying, and they declare that they are using Nickel-based superalloys, we...

Source please. AFAIK, CMC is a futuristic substitute for superalloys, and is not being used in current engines. If GTRE was pursuing this, they would not be dishing out these:- Designing Turbine Blades for Fatigue and Creep ^See point number 8: "Single Crystal alloys, the key to high...

I was doubtful at first, but now I am sure. You are indeed @Vijyes . Wars these days don't last half a decade like WWII, so for the 100th time, there is not going to be a requirement for 1000+ engines in one year if we go to war. Modern wars have stern escalation controls and even if we blow...

I thought that was the original agreement. Why the French doing a Russia on us now? Then how do we have 2nd gen SCBs? The challenge in creating 3rd gen SCB is not the amount of Rhenium that is used. The challenge in creating 3rd gen SCB is the instability in microstructure (TCP segregation) of...

Not quite what I was saying. By raw-materials, I mean ores. What I meant was that we do not yet manufacture Titanium parts of Al-31 in India from the ore stage. We might be machining some or all of the components from stock supplied by the Russians. Although that stock can be called...

I doubt that. You mean that even all Titanium parts are made in India? From raw-materials? I don't think that is possible. Yet.

Hey @Vijyes !! Long time no see!! BTW, what is 100%ToT?

Macron's visit has been delayed time and again. If I remember correctly, he was supposed to visit last December. Lets just hope this "big announcement" about Kaveri comes during this visit of Macron. I will only believe an official source on this matter.

No. In ships where Combined Diesel or Gas propulsion are used, such as in Shivalik class frigates, there are multiple engines. Some are CI Internal combustion (Diesel) engines and some are gas turbines. While cruising, gas turbines are kept off and the engine and ship's systems run off of the...