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I've always maintained that the collab is just a scam. Nobody parts with their crown jewels. This is the only area where the cutting edge will surely remain out of reach even in 2050 because we need a decades long engine development program with no funding cap, larger than even IGMDP to start...

This might be okay for static parts, but won't work for the turbine blades. The substrate they have chosen is not turbine blade material.

Not sure, @Ajax01 did mention that it has been physically tested already, so probably already developed. But don't know for what blade material. And if we can develop blades of that material. Don't think it can be part of any Indian engine by 2024-25. Maybe it will be used for AMCA engine though.

Earlier we had only 1200 degrees C capable Yttrium Stabalized Zirconia TBC. Beyond 1200 C it used to become ineffective at creating a thermal gradient between the turbine blade material and the gases coming out of the combustor. DRDO recently developed a two-layer TBC based on Lanthanum...

^Chinese agent asking to shut down important DRDO labs. :bplease: Just kidding. I know you aren't an agent. I don't think they ever stopped. Recent progress, especially in thermal barrier coatings is very encouraging.

That IDRW article says RR is offering new core development.

If you so much as try that are you'll get sanctioned by not just UK but also USA. Rolls Royce is integral part of US-UK MIC. Nobody touches them.

But French option is license production like Al-31. They already have a core ready. Doesn't seem like they are sharing IPR or the entire process with us. They will simply do to us what the Russians did to us with FGFA. RR seems to be promising more, but are also less reliable than the French...

This:-

They are throttling the fuel supply, but its supposed to be non-afterburning. And that doesn't look like afterburner exhaust either, not with that kind of instability. Doesn't seem like a flameout or a compressor stall either. The heck is happening here? EDIT: Its technically called a tailpipe...

This one seems like its for HTSE-1200.

I think Jha reported that DTTI on engines was indeed dead. But now that we have some idea that Kaveri might be out of the woods, Americans may now be trying to offer us the same tech they once denied. Americans always do that. When we are not close enough to achieving a technology in-house...

As far as I understand it, high altitude test facility isn't necessarily meant to be situated at a higher altitude. It just has to simulate higher altitude conditions. So it needs to throw rarefied air at colder temperatures at the engine. The facility should allow for testing of multiple...

No idea. I think he is talking about all the test facilities that we require for a serious jet engine program but currently don't have. Would include the high altitude ground test facility, flying test bed as well as various other facilities. Based on Kabini core, a high bypass version could...

Are developing or have already developed? If they are developing then it will take more time. Reminds me, the new fan should also lead to some improvement in pressure ratio.

True, that reason alone might not be enough. I was looking at the thrust to weight from an engine perspective, and remembered the thrust to weight ratio of 9 for GE-404 and 7.8 for Kaveri. Actually 9 was thrust to weight of GE-414 :facepalm: Lets just hope they get a good enough specific fuel...

Not yet, I think. It will be a big news whenever it happens.

Was that video from this year? After March? The news of the flameholder fix is from March this year. They would have tested it only after the that. At least in March, during the flameholder test, there were no flameouts.

Its common for jet engines. TS1400 is a helicopter engine. The helo can simply hover few feet above ground during initial flight tests. Kaveri can't be tested that way, 'cause if it fails, there is no safety net, it will cause the plane to crash. Therefore a flying testbed. Looking forward to...

Because its expensive but if they had the political will, they could have sold the idea to voters and got it done regardless. ISRO human spaceflight is expensive program. But its easy to sell to the public and so the politicians approved it. If Kaveri succeeds, they might even find it in them to...