ISRO General News and Updates

[Vamsi]

How? Only the Foxbat had a conventional turbojet engine that could reach up to Mach 3 and the engine had to be scrapped after reaching those speeds.


As far as I know, the transition between turbojet and ramjet modes in a turboramjet isn't a simple switch of the inlets, there are times when both are running together. That would introduce complex airflows and GTRE already has enough problems handling airflows in a conventional flow engine. If we go this route, it will be another long torturous development cycle, especially with the kind of funding we have.

Its either after burning turbojet upto M3 + DMRJ upto M6 or turboramjet upto M6 + Scramjet upto M9 , you cannot have a Turbojet upto M1.8 + Ramjet from M1.8 to M3 + DMRJ from M3 to M6 in a single airframe.

 

[Okabe Rintarou]

Its either after burning turbojet upto M3 + DMRJ upto M6 or turboramjet upto M6 + Scramjet upto M9 , you cannot have a Turbojet upto M1.8 + Ramjet from M1.8 to M3 + DMRJ from M3 to M6 in a single airframe.

Can't have because of weight penalties? I see.
Well, then we can safely say the timeline will not be adhered to. I hope it is, but a turboramjet is just too difficult to pull off.

 

[Vamsi]

Can't have because of weight penalties? I see.
Well, then we can safely say the timeline will not be adhered to. I hope it is, but a turboramjet is just too difficult to pull off.

Weight penalties as well as intake problems, you need a common intake for all 3 different engines

 

[Ajax01]

Buy an off the shelf engine they modify it. A Georgia based startup is attempting just that pretty sure ISRO can too.

 

[Vamsi]

Can't have because of weight penalties? I see.
Well, then we can safely say the timeline will not be adhered to. I hope it is, but a turboramjet is just too difficult to pull off.

In late 1990s and early 2000s DRDO planned a space plane called AVATAR. It was supposed to use a liquid aircycle engine. It collects oxygen mid air and liquify it and store it on board. It require very very complicated and complex technologies. But they studied it and its current status is unknown

 

[fire starter]

In late 1990s and early 2000s DRDO planned a space plane called AVATAR. It was supposed to use a liquid aircycle engine. It collects oxygen mid air and liquify it and store it on board. It require very very complicated and complex technologies. But they studied it and its current status is unknown

 

[Vamsi]

View attachment 117682

Do you know its current status, and what happened to that Technology demonstrator??

 

[SavageKing456]

In late 1990s and early 2000s DRDO planned a space plane called AVATAR. It was supposed to use a liquid aircycle engine. It collects oxygen mid air and liquify it and store it on board. It require very very complicated and complex technologies. But they studied it and its current status is unknown

It had feasibility studies completed in 2012

 

[Indx TechStyle]

What and when ?

Discussion few pages back.

 

[Karthi]

Posting the slides from the recent presentation of Dr Somanath . Collected more than 400 Slides in this month , i will post the reaming in the coming days . All are self explanatory, omitting many to avoid Spamming the thread. Really heart warming technologies , and these will be ready in this decade.

This Airbreathing Two stage to orbit Space plane can convert into our own SR-72 . all techs are now available . Including Dual Mode ramjet and Kaveri engine as Turbofan engine. I have posted about Kaveri in Kaveri thread . Dry Kaveri almost ready , resaerch on afterburner section going on

 

[Karthi]

Continue

 

[Karthi]

PS4 stage for debris removal with robotic arm , very good for removing chinese junks from Space using low cost PS4 spend rocket . Indian satellites can refuel using refuelling probe

An indian juggad , a swarm of drones to recover spend rocket engines and reusing. a cluster of drones with wit a net recovered a RH 200 booster .

 

[Vamsi]

Dr. S Somanath's latest interview
Guys, I'm willing to bet. He will be the next ISRO chairman

 

[Karthi]

Posting another set of pics Request everyone to traverse each picture you will get exciting stuff .

 

[Karthi]

 

[Karthi]

Please give an attention of the launching window calculations. ISRO already mission planned to planets like jupiter venus, neptune titan europa etc

 

[Karthi]

 

[Karthi]

View attachment 118170View attachment 118171View attachment 118172View attachment 118173View attachment 118174View attachment 118175View attachment 118176View attachment 118177View attachment 118178View attachment 118179

 

[Okabe Rintarou]

Great job @Karthi ! I've never seen such stuff from ISRO: delta v calculations of various missions, planetary defences, details of asetroid sample return mission (200 kg sample return with HLV!), active radiation shields, inflatable heat shields, etc. Thanks a lot man! Where did you even find this stuff?

Also never knew that it was possible to get delta v lower than that of Hohmann transfer orbits. But they've apparently managed to get one 25% less with a weak stability boundary transfer orbit, though the transit time is 4X as much.

 

[FalconZero]

Bro thank you for posting these slides, always find them informative.
Just a bit of confusion regarding the upper stage and the second stage of the future variants of the gslv.

This is what i knew or we knew in general that future variants of gslv will have a second stage powered by sce-200 engine with 120t fuel mass/thrust in total and also coupled with the 32t variant of the current upper stage using the same engine ce-20.

View attachment 117923

But now in this particular slide, we get a 160t 2nd stage with 27t upper stage, ummm why?

I don't exactly recall but i think either you or someone else posted here another ppt where it showed that we will have mk4 and mk5 variants of the gslv, basically a casual upgrade of second stage, third stage and maybe boosters i am not sure. So are these suggesting that configs may change or just old?

View attachment 118151

One additional query, are we going to use se-200 engine in any boosters of gslv?