DRDO, PSU and Private Defence Sector News

[Karthi]

For side radar ?

Is it a part of AMCA program?

Don't Know . These antennas may be for Studying stealth characteristics . Me and other members posted about different kinds of conformal antennas , we have the tech and we can use it in any platform as will

 

[THESIS THORON]

For side radar ?

CAN YOU EXPLAIN ME WHAT IS SIDE RADAR (LIKE ON ONE SU57 "CHEEK RADAR")

 

[Lonewolf]

CAN YOU EXPLAIN ME WHAT IS SIDE RADAR (LIKE ON ONE SU57 "CHEEK RADAR")

Yeah , they make up for field of view constraints , like a radar can look at max till particular angle , in that too ,at the sides the power output and beam clarification is low , so swashplate radar (like on gripen ng )or additional cheek radar like su 57 are used .

 

[Chinmoy]

What exactly do you mean? Please explain....ramjets are engines, i have no nother notion about it.

Even small ammo fired from .22 based on cartridge goes supersonic and rifle bullets typically mach 2 to 3 especially mil grade.....not all things have the size to put engines even much simpler engines. With that said, anything can be researched and even experimented and studied with 10000 to 1 odds but intuitively speaking an arty shell does not have the size nor it plays role in traveling great distances (related to size as one param) nor it reaches altitude where ramjet's work optimally. This is my intuitive thinking and some of these are contradictions.

This is more natural evolution and are still very much considered special but with small aero surfaces that can be controlled, targeting can be improved using gps and so on. So they are not that hard to visualize as arty shells already need propellent charge to get them going. Fitting another engine is a bit counter intuitive to me not that it is impossible.....may be go for 400 mm or 203 mm or like soviets did nuclear charge shells but generally overcomplicating never ends up well as there are always more efficient ways.

Your notion about RAMJET that it can't work in subsonic scenario is wrong.

Coming to next two points, wish instead of writing such a long essay, you had simply looked out for Nammo project or 1155 Project of Raytheon.

Your conventional thinking of Ramjet engine is what blocking you to understand it's implementation in artillery shell. To increase its range, you don't need to fire the engine for a prolong period like that in CM. You have to fire it for just couple of seconds at max.

Ar last, regarding adding up additional engines in arty shells. Well, the record distance of 48 km by ATAGS shell has been attained with a base bleed round. A base bleed round uses a gas generator in its base, technically a rocket engine, to increase its range.

 

[omaebakabaka]

Your notion about RAMJET that it can't work in subsonic scenario is wrong.

Coming to next two points, wish instead of writing such a long essay, you had simply looked out for Nammo project or 1155 Project of Raytheon.

Your conventional thinking of Ramjet engine is what blocking you to understand it's implementation in artillery shell. To increase its range, you don't need to fire the engine for a prolong period like that in CM. You have to fire it for just couple of seconds at max.

Ar last, regarding adding up additional engines in arty shells. Well, the record distance of 48 km by ATAGS shell has been attained with a base bleed round. A base bleed round uses a gas generator in its base, technically a rocket engine, to increase its range.

That's why I said sounds complicated and needlessly expensive, there are already rocket artillery for that with extended range. Excalibur one round is close to 150k if I remember,we can imagine what this one will be....I just don;t see a point and thats my opinion. I did not comment on subsonic, I provided a desired envelope for that kind of engine. There are certainly better projects to fund than this but again I do not write the check, I just write free personal opinions.

 

[Chinmoy]

That's why I said sounds complicated and needlessly expensive, there are already rocket artillery for that with extended range. Excalibur one round is close to 150k if I remember,we can imagine what this one will be....I just don;t see a point and thats my opinion. I did not comment on subsonic, I provided a desired envelope for that kind of engine. There are certainly better projects to fund than this but again I do not write the check, I just write free personal opinions.

Again wrong notion about warfare here.

Cost of a general Arty shell is around 1 Lakh/unit.
Even if we increase it 10 folds with RAMJET, it would cost around 10Lakh/unit. Now don't compare it with a guided shell at the drop of a hat. A guided shell like Excalibur would cost 2 times more because of its kit.

Now cost of a Pinaka Mk2 is 23 Lakh/unit i.e, double of a RAMJET powered shell. For each Pinaka rocket fired for 60 km range, you could fire two RAMJET shells. This is cost aspect of the shell over conventional shell and tube artillery.

Now a conventional 155mm artillery shell would weight 30 to 50 kg against a 100kg warhead of Pinaka. Now in our case, we can't go directly for caliber increment in case of a CFV. So when you have to target anything beyond the reach of conventional artillery shell, you have to go for Pinaka. This is going to cause collateral damage which would mean a global political issue. On top of that you would be giving an excuse to Pakis to use A-100 on you which could target you at 100Km. That means you would be keeping on escalating the game which you could have nipped at the bud with a cheap alternative.

So whatever you think of firing a shell or a war, Cost and Political implications are two important factors. So 155 mmm RAMJET shell is a cost effective solution which could bridge the gap between artlley and tube artillery. Just like Excalibur, which cost a whooping 44Lakh/Unit, it would be a special purpose ammo on our arsenal.

 

[notaname]

@DRDO_India has developed single crystal blades technology and supplied 60 of these blades to Hindustan Aeronautics Limited @HALHQBLR as part of their indigenous helicopter development program for helicopter engine application. https://t.co/IMk8WXpJuf

 

[omaebakabaka]

Again wrong notion about warfare here.

Cost of a general Arty shell is around 1 Lakh/unit.
Even if we increase it 10 folds with RAMJET, it would cost around 10Lakh/unit. Now don't compare it with a guided shell at the drop of a hat. A guided shell like Excalibur would cost 2 times more because of its kit.

Now cost of a Pinaka Mk2 is 23 Lakh/unit i.e, double of a RAMJET powered shell. For each Pinaka rocket fired for 60 km range, you could fire two RAMJET shells. This is cost aspect of the shell over conventional shell and tube artillery.

Now a conventional 155mm artillery shell would weight 30 to 50 kg against a 100kg warhead of Pinaka. Now in our case, we can't go directly for caliber increment in case of a CFV. So when you have to target anything beyond the reach of conventional artillery shell, you have to go for Pinaka. This is going to cause collateral damage which would mean a global political issue. On top of that you would be giving an excuse to Pakis to use A-100 on you which could target you at 100Km. That means you would be keeping on escalating the game which you could have nipped at the bud with a cheap alternative.

So whatever you think of firing a shell or a war, Cost and Political implications are two important factors. So 155 mmm RAMJET shell is a cost effective solution which could bridge the gap between artlley and tube artillery. Just like Excalibur, which cost a whooping 44Lakh/Unit, it would be a special purpose ammo on our arsenal.

There is a reason why you don't see shit like this ever replacing anything other than novelty and western white elephants to pocket more of tax payer money. Ramjets are nothing new....if this idea had merit you would seen these things long time back.....don't make everything a missile or what its not. Rest is your blabber......first understand simple english and context and not parrot "wrong notion" to everything and everyone. Keep your opinion and I will keep mine. To simplify more let's agree to disagree.....if it has merit it will come to market

 

[Lonewolf]

@DRDO_India has developed single crystal blades technology and supplied 60 of these blades to Hindustan Aeronautics Limited @HALHQBLR as part of their indigenous helicopter development program for helicopter engine application. https://t.co/IMk8WXpJuf

If i remember there were some similarities in core of hal htfe 25 and htse 1200 ,so experience gaining exercise nice

 

[Arihant Roy]

The HPT blades have been manufactured using vaccum investment casting method from nickel based CMSX-4 superalloy . 60 sets have already been delivered .

Defence Research and Development Organisation (DRDO) has developed single crystal blades technology and supplied 60 of these blades to Hindustan Aeronautics Limited (HAL) as part of their indigenous helicopter development program for helicopter engine application. It is part of a program taken up by Defence Metallurgical Research Laboratory (DMRL), a premium laboratory of DRDO, to develop five sets (300 in number) of single crystal high pressure turbine (HPT) blades using a nickel-based super alloy. The supply of remaining four sets will be completed in due course.

Helicopters used in strategic and defence applications need compact and powerful aero-engines for their reliable operation at extreme conditions. To achieve this, state-of-the-art Single Crystal Blades having complex shape and geometry, manufactured out of Nickel based superalloys capable of withstanding high temperatures of operation are used. Very few countries in the world such as USA, UK, France and Russia have the capability to design and manufacture such Single Crystal (SX) components.

The DMRL undertook this task based on its expertise gained during the development of such a technology for an aero-engine project earlier. Complete vacuum investment casting process to realise the blades, including die design, wax pattering, ceramic moulding, actual casting of components non-destructive evaluation (NDE), heat treatment and dimensional measurement, has been established at DMRL.

Special ceramic composition had to be formulated for making strong ceramic moulds which can withstand metallostatic pressure of liquid CMSX-4 alloy at 1500°C and above during casting operation. The challenge of maintaining the required temperature gradient has also been overcome by optimising the casting parameters. A multi-step vacuum solutionising heat treatment schedule for complex CMSX-4 superalloy to achieve the required microstructure and mechanical properties has also been established.Further, a stringent non-destructive evaluation (NDE) methodology for the blades along with the technique for determining their crystallographic orientations has been developed.

Raksha Mantri Shri Rajnath Singh has congratulated DRDO, HAL and the industry involved in the development of critical technology.

Secretary Department of Defence R&D and Chairman DRDO Dr G Satheesh Reddy congratulated and appreciated the efforts involved in the indigenous development of this vital technology.

 

[Leonardo Alves]

The HPT blades have been manufactured using vaccum investment casting method from nickel based CMSX-4 superalloy . 60 sets have already been delivered .

View attachment 86867

what is the max. temperature limit these can sustain will be the main achievement. These are liquid at 1500 celsius so must be in range of 1400 to 1600 from me.
Must be for htfe-1200 and it's variant.

 

[Lonewolf]

what is the max. temperature limit these can sustain will be the main achievement. These are liquid at 1500 celsius so must be in range of 1400 to 1600 from me.

That's a super alloy not pure nickel

 

[Leonardo Alves]

That's a super alloy not pure nickel

Yes and if I am not wrong most HPT goes on this line of temp. sustainment, high class ones from west.
I actually wanted to give 1300 to 1400 range but the India fraternity can do wonders nowadays.

 

[fire starter]

 

[FalconSlayers]

 

[Karthi]

warhead's of DRDO Missile Launched Precision guided munitions (MLPGM). 10Kg.

80 kg FG Warhead for endo-atmospheric interceptor missile

40 kg FG Warhead for endo-atmospheric interceptor missile

 

[Lonewolf]

@Karthi sir , us the present model of drdo final or a more advanced version with better fuel cell in deveolpment ( solid based fuel cell) .

@Bleh hvt sir once wrote there are two versions of cats warrior , what were they ?

 

[Tactical Doge]

@Bleh hvt sir once wrote there are two versions of cats warrior , what were they ?

A small one for flight testing and as a testbed
And the full size production Variany,
AFAIK

 

[Lonewolf]

A small one for flight testing and as a testbed
And the full size production Variany,
AFAIK

Engine ????, If final version get hal htfe 25 , it would be the mini Bomb truck

 

[Vamsi]

Engine ????, If final version get hal htfe 25 , it would be the mini Bomb truck

PTAE-7 engine