DRDO, PSU and Private Defence Sector News

[ezsasa]

HAL should try that concept on LUH like this.
View attachment 55170View attachment 55169

At this point in time, forces will reject the design citing maintenance costs. More parts more opex.

 

[airtel]

Since it's a decade away they should try some new design concepts like raider x. Replacing mi 17 with another similar design is redundant.

HAL should try that concept on LUH like this.
View attachment 55170View attachment 55169

Since DRDO has limited budget and experience they don't try to experiment with new ideas , look all the weapons of DRDO Tejas , lch , dhruva etc all of them have simple less complicated , less innovative designs .
They are investing money only on only those designs in Which they are sure of success .

 

[Tuco]

Since DRDO has limited budget and experience they don't try to experiment with new ideas , look all the weapons of DRDO Tejas , lch , dhruva etc all of them have simple less complicated , less innovative designs .
They are investing money only on only those designs in Which they are sure of success .

Isn't HAL helicopter division self contained and has independent R&D, I mean DRDO doesn't have any say. I think HAL has a bit more freedom to spend money on R&D.

 

[airtel]

Isn't HAL helicopter division self contained and has independent R&D, I mean DRDO doesn't have any say. I think HAL has a bit more freedom to spend money on R&D.

And why do you think so ?

IAF is buying helicopters aeroplanes exactra from HAL but they are not paying their dues .

But HAl has to pay for subsystems which they get from foreign countries or private companies .


Btw my comment was for all Indian organisations not just DRDO , most of our rockets , missiles , aircrafts , destroyer frigates etc have simple less complicated designs which have high chances of success .

Their approach is not wrong according to me .

 

[ARVION]

.

 

[Bleh]

View attachment 55060

In Akash Mk1S the newly added active radar seeker works in conjunction with the original command guidance module retained from Akash Mk1.

The RPF ( radio proximity fuze ) receiver antenna which was in the nose of the missile was replaced with the Ku band active radar seeker . A new miniaturised and modified RPF antenna was placed behind the seeker which can be seen in the form of 2 new antennas protruding from the airframe.

View attachment 55061

I now present a general idea on how the dual guidance of Akash Mk1S works.

Case 1. Either standalone with command guidance only.
Case 2. Either standalone with active radar seeker only ( LOBL )
Case 3. combined guidance , initially with command guidance and than handover to active radar guidance in terminal stage. ( LOAL )

Case 1 :

When the akash is launched initially it will be command guided and if conditions permit , akash will enter end game manuvers with command guidence only. This offers guaranteed kill probability if the target is within LOS ( line of sight ) of the Rajendra guidance radar . It is very difficult to jam a GBR ( ground based radar ) compared to jamming of an onboard radar seeker. Also if for whatever reasons ( like airborne jamming or EW ) the onboard radar seeker is not able to or fails to acquire and lock on its target, command guidance will guide the missile to the target.

Case 2 :

Again depending on real time operational requirements

1. If the target is within the range of the onboard radar seeker, the seeker will lock on the target before launch . This is same as LOBL ( lock on before launch ) , it allows for faster engagement of the target provided the target is within the onboard seeker range.

2. If the Rajendra radar at any point of time detects it is in the danger of losing target lock due to action by airborne jammers/ECMs etc or is in the danger of being fired on by ARMs ( anti radiation missiles ), the GBR will switch off. The last known command guidance inputs preserved in the onboard computer of the missile will take the missile within the precalculated/anticipated zone where the onboard RF seeker will be activated to begin search for the target and initiate target lock for autonomous homing ie the onboard memory module preserves the previous command guidance inputs and the guidance algorithms calculates the intercept trajectory based on them which will guide the missile close to the target where the RF seeker can be switched on to search and lock on its target.

Case 3 :

Again depending on real time operational requirements

The missile will be launched and command guided from the GBR to take the missile to the optimal intercept point where the NEZ ( no escape zone ) of the missile is highest possible. And from within this NEZ the onboard radar seeker will be switch on to acquire and lock on the target in minimum time and with near 100% guaranteed lock . This will ensure the highest KP ( kill probability ) . This mode is similar to LOAL ( lock on after launch ) .

View attachment 55063

Conclusion :

One must realise onboard seeker must be within a predesignated distance from the target before it can successfully search locate and lock on its target with high kill probability. The closer the seeker is to its target before switching on, the higher is its ability to positively acquire and lock on its target and hence higher is the missile kill probability.

Rough analogue will be mid course guidance which must be provided first to take the missile close to the target so that the onboard seeker can come into play for guaranteed target kill.

Here Akash Mk1S command guidance comes into play both for mid course guidance as well as for end game guidance, with the added benefit that the onboard active radar seeker takes over the end game guidance if the command guidance is terminated after mid course guidance phase (or even earlier ) due to adverse conditions or enemy countermeasures. Additionally even without involving the command guidance ( ie the rajendra fire control radar ) the missile can be launched with the help of the onboard active radar seeker in LOBL mode.

View attachment 55062

In my knowledge Akash Mk1S is the only missile in the world with such unique guidance capabilities. Hopefully they will increase its range to 45 km by simply replacing the current propellant with the Al based propellant ( fuel rich propellant ) , already developed and tested by iit Madras team.

Note : anybody wanting to use it , feel free to use , just give the due credit .

What exactly are these?..

 

[porky_kicker]

What exactly are these?..

What do you mean ?

 

[Bleh]

What do you mean ?

Oh sorry, pic didn't attach. I meant these.

 

[Karthi]

Pump Jet Propulsion research Of DRDO. Accidentally found from my laptop

Test setup for the wake survey of LWB body model fitted with PJP

Schematic diagram of LWB fitted with PJP

LWB fitted with PJP.

LWB model ailieghned in the test section

Schematic diagram for instrumentation and test setup for LEB model fitted with PJP.

 

[Karthi]

PJP Layout

Electric Drive Train

Proposed electric Motor Compartment for PJP , electric Motor will provide 35 MW of power , scale down version with 1MW is under testing

 

[porky_kicker]

Oh sorry, pic didn't attach. I meant these. View attachment 55176

Air intake cap for the the air intakes . They are dropped once the booster burns out for the ramjet to kick in.

 

[NeXoft007]

ALWT already have Pumpjet Propulsion, but light weight torpedo design have its own power restrictions.

Also, I have seen a post above about Takshak, Takshak is EHWT, originally a sub-launched variant of Varunashtra, but with uprated 330kW battery (if my info is right) and have no relation with Shakti Thermal Torpedo that has power output of 500kW. There's no new info about Shakti or Takshak. But we will hear more about Takshak in near future.

 

[BangaliBabu]

View attachment 55198

PJP Layout

View attachment 55199

Electric Drive Train

View attachment 55200

Proposed electric Motor Compartment for PJP , electric Motor will provide 35 MW of power , scale down version with 1MW is under testing

for subs??

 

[Karthi]

for subs??

This one is for Submarines

 

[Karthi]

Development of Fluidic Thrust Vectoring Capability for AURA High Aspect Ratio Fixed Nozzle (ADA) was developed by IIT Kanpur.

Thrust vectoring is an important feature in combat air vehicle design. There are various methods of achieving thrust vectoring. One of the conventional methods is by using complex mechanical actuation systems. These are usually very expensive, heavy, sluggish and difficult to integrate and maintain. They are also aerodynamically inefficient and as stealth requirements become even more important, the need for a reduction in the radar- cross section (RCS) and infra-red radiation (IRR) signatures of military aircraft becomes a huge challenge. Another method of achieving thrust vectoring is by using fluidics. “Fluidics” is the technology of employing general fluid phenomena of wall attachment and stream interaction in specially designed devices to perform the functions of sensing, logic and control. Fluidic thrust vector control involves the use of no moving parts. It increases structural rigidity and decreases weight. It has great flexibility, rapid response and is inexpensive. With careful design, it could lead to a reduction in the overall radar cross section of the aircraft. Research in this area has been carried out to demonstrate the fludic thrust vectoring technique in a rectangular nozzle.

In picture : FLUIDIC THRUST VECTORING & COMBUSTION INSTABILITY RESEARCH FACILITY at NAL

 

[fire starter]

View attachment 55224

View attachment 55225


Development of Fluidic Thrust Vectoring Capability for AURA High Aspect Ratio Fixed Nozzle (ADA) was developed by IIT Kanpur.

Thrust vectoring is an important feature in combat air vehicle design. There are various methods of achieving thrust vectoring. One of the conventional methods is by using complex mechanical actuation systems. These are usually very expensive, heavy, sluggish and difficult to integrate and maintain. They are also aerodynamically inefficient and as stealth requirements become even more important, the need for a reduction in the radar- cross section (RCS) and infra-red radiation (IRR) signatures of military aircraft becomes a huge challenge. Another method of achieving thrust vectoring is by using fluidics. “Fluidics” is the technology of employing general fluid phenomena of wall attachment and stream interaction in specially designed devices to perform the functions of sensing, logic and control. Fluidic thrust vector control involves the use of no moving parts. It increases structural rigidity and decreases weight. It has great flexibility, rapid response and is inexpensive. With careful design, it could lead to a reduction in the overall radar cross section of the aircraft. Research in this area has been carried out to demonstrate the fludic thrust vectoring technique in a rectangular nozzle.

In picture : FLUIDIC THRUST VECTORING & COMBUSTION INSTABILITY RESEARCH FACILITY at NAL

watch this.

 

[Karthi]

Visit : this link

FLUIDIC THRUST VECTORING & COMBUSTION INSTABILITY RESEARCH FACILITY - CSIR - NAL

www.nal.res.in

 

[Karthi]

The Chinese globel times news. Chines helicopter shoot down by unknown Indian EMP (Electro magnetic pulse weapon) busted .


Is this true ???

 

[patriots]

View attachment 55238

The Chinese globel times news. Chines helicopter shoot down by unknown Indian EMP (Electro magnetic pulse weapon) busted .


Is this true ???

Seems this photo is from a Pak poster ......
Bdw there were some photos in social media ..but nothing in mainstream media .... again....wrong thread

Post here......

India-China 2020 Border Dispute - Military and Strategic Discussion

This is a continuation of the thread "India China LAC & International Border Discussions" which ran into 1,338 pages and over 26,750 posts. That thread was like a bottle of Maaza (less than 4% of actual fruit). Try to stick to the military, tactical, and strategic angles of the ongoing...

defenceforumindia.com

 

[amit19]

View attachment 55238

The Chinese globel times news. Chines helicopter shoot down by unknown Indian EMP (Electro magnetic pulse weapon) busted .


Is this true ???

EMP or microwave weapon?

Or the copter went down due to malfunction and chini trying to hide it by blaming India?