DRDO and PSU news and discussion

[Holy Triad]

Since September 7.

 

[Dessert Storm]

DRDO Air Launched EMP Bomb

 

[porky_kicker]

View attachment 63637

This is the pic of SMART prior to launch

Contrary to a normal missile , some things are out of place

Find and list them if you can

Since nobody answered

The SMART missile doesn't fit inside the cannister . Possibly the cannister is shaurya cannister and is therefore a temporary arrangement.

A large part of its nose section is above the cannister which terminates at the topmost launcher holding arm.

Presence of a gas generator section at the bottom of the cannister.

SMART nose section has several ports possibly exhaust ports for RCS / VTM , and also several lateral slits are seen, I am guessing they contain fins which come out and then deploy by rotating 90 degree axially inorder to act as a aerodynamic braking system prior to seperation of the nose cone sections inorder to expose the torpedo payload for release. ( Also additionally the fins could act to allow safe seperation of the nose cone sections via aerodynamic drag in the absence of a seperation bladder system which normally is used to seperate the nose cone sections in flight )

 

[Dessert Storm]

4 millionth wheel rolled out by Rail Wheel Factory.

 

[Dessert Storm]

 

[porky_kicker]

Explosively driven helical flux compression generators or EHFCG have strategic role towards realisation of high power microwave generation, especially compact sized EMP weapons easily delivered by aerial bombs PGMs or missiles.

The picture below is very old and AFAIK only picture available of any component in relation to indian work on EFCG based technology.

The above picture is of a laboratory specimen of a helical FCG coil. In experiments with the above efficiency >= .75 was achieved.

Follow on experiments with improved design allowed a final output of 450ka with a seed current of only 4.3ka. At that time that is early 2000 it was the highest current gain ever achieved from HFCG experiments in India.
The high current pulse is then converted into high voltage pulse to drive a VIRCATOR to generate HPMW pulses strong enough to fry even hardened electronics etc.

Above is the block diagram of the timing circuit of seed current in stator and high explosive in armature and triggering of the diagnostics for lab testing.

However few years back drdo had moved on to more sophisticated Explosive-Driven Magneto- Hydrodynamic Generator for EMP.

 

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This is the pic of a reasonable small form factor Indian Marx generator ( laboratory model ) , Marx generator purpose is to generate a high voltage pulse from a low voltage supply in order to power HPM ( high power microwave ) systems. Marx generator are of various sizes depending on the output required .

Small sized Marx generators are required for EMP bombs in order to generate the desired high voltage output in a small form factor necessary to produce electromagnetic pulses via suitable pulse generating technologies.

Also there are other technologies which can be used in place of the above.

 

[porky_kicker]

The pic below is a Indian experimental lab model of S band magnetically insulated line oscillator (MILO) for generating HPM ( high power microwave ) pulses.

Generally MILO is a cross field device that generates gigawatts level of HPM. The device is compact because it generates the magnetic field by itself.

In the above experimental lab setup with the compact S band MILO with 2 choke, 3 SWS cavities and one coupling cavity , RF output power of 4 MW at a frequency of 3.26GHz for the beam voltage of 485 KV and the current of 48.4 KA was obtained.

The significance of MILO lies in its ability to deliver highest energy per mass per pulse compared to other HPM source devices/technologies.

And importantly MILO allows for smallest possible dimensions for a HPM weapon system along with the relevant support systems , light and compact enough to make it mobile ie truck / trailer / track mounted for battlefield operations.

According to unclassified reports the Americans tested mobile MILO devices with RF energy levels well over 1KJ per pulse ( 2-3 GW for .5-1us ).

AFAIK to the above system If a explosively pumped FCG or MHD is added and necessary miniaturisation is done in order to fit into a form factor of say a 500 kg bomb , one will possible get a very powerful EMP bomb strong enough to destroy all electrical and electronic equipments in a area as large as mumbai.

 

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COMJAM COMINT DF EW system

 

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Some of the work done by civilian agencies on pulse power systems

Most of these technologies can be easily reconfigured for military purposes

 

[porky_kicker]

Old but useful info on RUDRAM-2 and PRALAY

 

[porky_kicker]

This is a portion from a declassified doc from American NIA

Makes for a quite interesting read

AFAIK Rainfall lemonwood are SIGINT / ELINT facilities located in Thailand.

Also AFAIK during the said period they manged to break our comm and telemetry codes used during missile tests.

 

[porky_kicker]

Electro optical tracking system used during missile tests

 

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Only available pic of drdo seabed passive sensor array using hydrophones ( being deployed at sea - pic is old )

 

[utubekhiladi]

AFAIK Rainfall lemonwood are SIGINT / ELINT facilities located in Thailand.

Also AFAIK during the said period they manged to break our comm and telemetry codes used during missile tests.

what does it mean? does it mean our missiles like sagarika and dhanush are compromised??

Electro optical tracking system used during missile tests

View attachment 63919

is this thing home made?

 

[porky_kicker]

what does it mean? does it mean our missiles like sagarika and dhanush are compromised??

Lol depends

Most probably they know the actual capabilities associated with the said systems tested during that period.

During tests missiles carry telemetry equipments , during test flight they continuously emit signals which contains encrypted real time generated flight related information , onboard sensor generated information , navigation / guidance related information etc . If the information is isolated from the carrier signal and decrypted then one will have a very good idea of the actual capabilities of the system.

Perse the weapon is not compromised in terms of its capabilities , what is compromised is the information relating to its actual capabilities and it's strengths and weakness if any.

Anyways the breach was closed and necessary steps were taken to implement more secure signals and with better encryption.

 

[utubekhiladi]

Lol depends

Most probably they know the actual capabilities associated with the said systems tested during that period.

During tests missiles carry telemetry equipments , during test flight they continuously emit signals which contains encrypted real time generated flight related information , onboard sensor generated information , navigation / guidance related information etc . If the information is isolated from the carrier signal and decrypted then one will have a very good idea of the actual capabilities of the system.

Perse the weapon is not compromised in terms of its capabilities , what is compromised is the information relating to its actual capabilities and it's strengths and weakness if any.

Anyways the breach was closed and necessary steps were taken to implement more secure signals and with better encryption.

thanks for the reply.. also one more question.

Electro optical tracking system used during missile tests

View attachment 63919

is this thing home made?

 

[porky_kicker]

is this thing home made?

Seriously ?

Long range EOTS is something one makes at home ?

 

[utubekhiladi]

Seriously ?

Long range EOTS is something one makes at home ?

no boss, I meant home made as indigenous, Made in India.

 

[porky_kicker]

Troop level radar IA