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Karthi

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Pumpjet propulsion under development by DRDO. Feasibility study completed. Electric motor integrate withpymp jet propulsion will make subs Stealthy , Simple and less maintenance

IMG_20200730_103447.jpg



Layout of Pump jet propulsor. They consist 2 rows of blades stator & rotor shrouded by a duct
 

porky_kicker

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Nag missile...
Photo from today's tender document...tender issued for 2 nag models......View attachment 54734
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Is that a RF transparent window for data link next to the image processor bay ?

Don't recollect nag having a RF datalink before

Can't anybody confirm if nag had such a RF transparent window previously ?

If not then it is a new addition and points towards LOAL capability
 
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BangaliBabu

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View attachment 54770

Pumpjet propulsion under development by DRDO. Feasibility study completed. Electric motor integrate withpymp jet propulsion will make subs Stealthy , Simple and less maintenance

View attachment 54772


Layout of Pump jet propulsor. They consist 2 rows of blades stator & rotor shrouded by a duct
That's a DRDO hydrodynamic model for our future nuke subs?? It looks more like a torpedo model/actual torpedo with shrouded PJP!!
 

Karthi

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India employs home-grown Quantum cryptographic scheme for secure communication.

Researchers at the Raman Research Institute (RRI) in Bangalore have implemented India’s first quantum cryptographic scheme to enable secure communication of sensitive data1 — an acute need during the COVID-19 pandemic with most government, defence and academic communication going online. The widely used information transfer protocols employ a secret “key” known only to the communicating parties, who can encrypt and decrypt the messages. The mathematical toolbox used in such protocols is vulnerable to access by eavesdroppers. “The answer to this lies in using the Quantum Key Distribution or QKD,” says Urbasi Sinha, who heads the RRI teamQKD is a cryptographic method that enhances the security of the communication link by exploiting the principles of quantum mechanics such as the uncertainty principle and no-cloning theorem, Sinha says.

The process enables two remote users to generate and share a secret key – composed of a string of ‘0’ and ‘1’ bits – which they can use to encrypt and decrypt secret messages. A unique property of QKD is that any unauthorized break-in is immediately detected. It also protects the encrypted information from threats that might arise from future advances in computational power. The team developed QKD protocol indigenously as part of an ongoing project on secure quantum communication between two Indian ground stations using a satellite of the Indian Space Research Organisation (ISRO). “This is India’s first and only project on satellite based QKD,” says Sinha. The protocol operated with a high key rate of 50Kbits/second and low quantum bit error rate (QBER) of~3.5% — features that guarantee high security. “QKD is one of the crucial components of the high-powered National Mission on Quantum Technologies just launched by the Indian government,” Dipankar Home, a quantum physicist at the Bose Institute in Kolkata, told Nature India.
 

Ujjain

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View attachment 54770

Pumpjet propulsion under development by DRDO. Feasibility study completed. Electric motor integrate withpymp jet propulsion will make subs Stealthy , Simple and less maintenance

View attachment 54772


Layout of Pump jet propulsor. They consist 2 rows of blades stator & rotor shrouded by a duct
Is it for some AUV or torpedoes or something strategic?
 

Bhadra

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I get that but what level of protection can you expect from a light tank??!! I mean, their armor is no better than that of a modern IFV and their armor is hardly sufficient (if at all) to defend against any kind of even half-decent anti-tank weapon. So, don't you think that, if our army wants to deploy armored forces in Ladakh to act as a sort of mobile blocking force, then wouldn't it be more prudent to just deploy more MBTs like T 90Ms supported by ATGM carriers and gunships acting as a screen??

But in any case, it seems just moot since I don't believe the Army would ever gonna deploy any light tanks in Ladakh anyway.
Interesting....

Weapon platforms are designed for a purpose and an environment. Kind of threat and levels of Threat is an important part of the environment.

Tanks are designed for a dense anti tank environment and the purpose of tank is to be able to face anti tank weapons and breakthrough it either by penetration or bypassing to carry out the desired maneuver. Henec tanks are designed for protection from anti-tank fire, defeat anti-tank environment (mainly tanks) by fire power and carry out quick maneuvers (mobility).

On the contrary, the APC is designed to function in a light anti tank or suppressed anti tank environment but heavy anti-personnel environment in association with tanks. So the emphasis is on providing protection against small arms fire. give it a preponderance of small arms fire and mobility so that Infantry personnel could perform their tasks.

The over all idea is to achieve the togetherness of tanks and Infantry soldiers and not allow their separation due to enemy actions. That though may always may not be possible to achieve.

Therefore technologies have developed system that combine a tank and APC and make that as heavily protected carrier of infantry.. like Merkava.

yet again light tanks have been developed mainly to provide extended mobility to the platform wherein these can be taken to the objective areas by sea, helicopters, air-dropped or air transported. And to the araes where one doe not expect heavy anti tank environment like LICO. Basically those have been designed for expeditionary tasks. Korean Light tank is an example of it.

But the Indians are talking of only a light tank minus it being an infantry carrier. Such thinking envisages that Tank and Infantry is either have a separate carrier like BMP or tanks are only used as Infantry support weapons. Tanks are light only for the sake of transportability or amphibious requirements.

Hence. at the superficial look of it it appears as if IA has no doctrine for a light tank except for transportability... lift those and put those at Depsang. But what after that ?? That much effort for a platform that can not take a RPG shot ?? Not worth it.. Then India may as well go in for transportable Meduim tank of 34 - 38 ton class by L&T.

But if this light tank is an infantry carrier the entire perspective changes.. then it is a potent weapon for all expeditionary operations.. then It is a potent platform for recce and support, Flank protection, Scouting, command posts, MOUT. riverine terrain and even high altitude operations.. Then it is a BMP2 mounted with a gun... BMP up engined to minimum 800hp...

DRDO must get cracking on such product.
 

Bhadra

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View attachment 54895

Is that a RF transparent window for data link next to the image processor bay ?

Don't recollect nag having a RF datalink before

Can't anybody confirm if nag had such a RF transparent window previously ?

If not then it is a new addition and points towards LOAL capability
The answer is simple...
If the missile is required to function in an integrated environment with Rudra and LCH and UAVs then it must have a data link.

Then it must be a 7-8 km range missile...
Then it must be LOAL and MMW seeker missile ...
Then it should be Henina... ground-launched..
Then the integrated command platform and RF link system should preferably be compatible with Apaches also..
IIR seeker should be used only for MPATGM..

NAG is out...
 

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