Here is some old discussion regarding engine blade and problems and our tech status.
Credit :: BRF forum discussion.
And funfact is GTRE has core working OK, and has had trouble with LP Compressor and AB system mainly. So I dont see the point in replacing core. What we shud hv gotten from French is SCB. Not the ToT but blades supplied to our design. And help in AB system design.
JayS · Yesterday, 10:46 PM
JayS
I never have seen no reference to SCBs in Kaveri so far, apart from SCBs from DMRL. Kaveri has had DS blades. We do not have technology so far, for TBC coating and laser hole drilling. For that the blades are sent abroad. I cant think why France wouldnt want to mfg scb stock blades for us and supply.
JayS · 12:12 AM
JayS
The process that Russians ToTed is less advanced than even what DMRL has developed. What we were lacking was TBC and laser drilling. Recently we have seen TBC related tender from DMRL, IIRC, indicating some definite progress there.
JayS · 12:15 AM
#JaiShriRam Ramana
France had a close call with DT demanding India buy American for 114. India refused and bought S400. So France owes India one.
JayS
Interestingly HAL's HTSE1200 also have SCB in them. Question is how is HAL making them, or is it Snecma which is supplying them..? Its highly likely that HAL is getting Shakti SCB from Snecma and usi g them in HTSE. I would be surprized to see HAL making those SCB on their own based on Russian ToT. Its definitely a possibility and would be a pleasant surprize if its the case.
JayS· 12:25 AM
JayS
GTRE folks say its ready. Scecma has audited and says its ready for limited flight testing.
JayS· 12:27 AM
JayS
There is a plane for couple of FT campaigns on larger FTB, most likely IL76. I think a tender was out for first one. But my memory is bit hazy on this. The discussion must be there in Kaberi thread. Or Indranil might remember.
JayS· 12:30 AM
#JaiShriRam Ramana
Indranil and your article on MWF and comparison to Grippen being read in high places.
#JaiShriRam Ramana · 12:55 AM
JayS
Good too know. If it makes some. Impression where it matters,nothing like it.
JayS · 1:40 AM
No Jay, I meant the SCBs were almost ready from our labs and it was only a question of jigs. I don't recollect any news after that we made to make the prototype (k9?).
The failure was with the existing blade.. and we were working on the SCB (drdo pub i recollect). BTW, isn't DS the first step to single crystals? The process used by russkies for the AL fps is different? Or we never got this tech from them?
Anyway, I think we were close yp get the 90* bends with SCB (I need tp refer the pub) or something. I vaguely remember zirconium reference..hence the question.
2:43 AM
JayS
DMRL has 2nd Gen SCB. But they can make the stock material. From there to finished blade need two critical. Tech we didnt have, TBC and Laser driling for cooli g holes. Midhani was in process of dev those tech. This is way back in 2017.recently there was a tender for TBC machine setup.
JayS · 5:46 AM
JayS
Russian tech is a bit tedious one, per a DMRL scientist. Western method is better and DMRL has followed the western approach. Also IIRC, Al31 HPT blades have single pass internal cooli g channels. While western scb have multipass. Even DMRL blades are multipass.
JayS · 5:48 AM
JayS
We have couple of small jet engines, PTAE7, Manik which are good for drones. Companies like Poerjet, Kalyani are making micro jets. HTFE25 is there. Kaveri is too tfta for drones.
JayS· 6:17 AM
At IITB, we have now new propulsion lab for SCB research