DRDO, PSU and Private Defence Sector News

[NoobWannaLearn]

Did Zorawar enter user trials?AFAIR it was supposed to enter user trials some time in April right?

Was supposed to go this month so probably went for trials hard to get info on it

 

[standard snowball]

The Truth about the Rohini radar!!!

FORCE Magazine/Tempur defence writer Prasun K Sengupta wrote in a few days ago to say, "Before DRDO and BEL take us all to Cloud 9 regarding the Rohini and Revathi 3-D radars, Rohini and Revathi 3-D radars are derivatives of the Polish TRS-19 radar, developed by Poland's Przemyslowly Instytut...

defenceforumindia.com

can anybody shed more light on this

 

[Samej Jangir]

NO, IT DOESN'T!! It's just a big effing myth. T-90 has thicker armor than Arjun as well as having much better and more uniform coverage, as in, more of its surface area being covered by the said armor.


Whoever gave you that idea??!!

Then why is Arjun so heavy? Is it just because of the extra crew needing more room? As for APFSDS, rifled guns have difficulty as the fins themselves give stability and does not need spinning force to keep the ammunition aligned. Rifling interferes with the fin stabilisation. This is why most tanks use smoothbore. Also, rifled bored wear out quickly while smoothbore have long life.

 

[Satish Sharma]

The Truth about the Rohini radar!!!

FORCE Magazine/Tempur defence writer Prasun K Sengupta wrote in a few days ago to say, "Before DRDO and BEL take us all to Cloud 9 regarding the Rohini and Revathi 3-D radars, Rohini and Revathi 3-D radars are derivatives of the Polish TRS-19 radar, developed by Poland's Przemyslowly Instytut...

defenceforumindia.com

can anybody shed more light on this

hehe sem2sem with little antenna differences.

Here are some details on Rohini/ Revathi series based on some extensive googling + source research, IEEE, Radar symposium etc

-LRDE and PIT worked together on a family of mobile S Band radars, which PIT marketed as the TRS-15 and now 19

The first LRDE version was developed as the 3D CAR and displayed in 2001. (This is why Prasun seized upon the date). Of course, the fellow didnt even grasp the fact that a developed system displayed in 2001 meant work on the system would have been ongoing from several years before and that PIT would admit its cooperation with LRDE to jointly develop the radar

LRDE and PIT cooperation was basically to develop the antenna system and overall architecture.

After that both countries seem to have gone their way. Eg Signal processing on both radars is different and so are design aims.

For instance latest 3D CAR on DRDO site is advertised as TWS 150 targets, while the latest PIT TRS radar can only TWS 120. But TRS-19 has some 10-20 km more range and more height coverage. Other hardware is also different
PIT Variants:

PIT had originally advertised the TRS-15 and its been moved upto the TRS-19 designation but as mentioned, it has significant differences from the 3D CAR, as well as the Rohini. The PIT variants apparently have different transmitters, different exciter/ receivers as well as signal processing.

PIT priority:

PIT has concentrated on the TRD-1211 radar and a different design, the TRC-20. Both have been ordered by the Polish services, the AF and Army respectively.

7 TRD1211 Radar types are in service with the Polish AF. These are large radars for theater defence with ranges of 300 km and beyond.

The TRC-20 is actually 4 PESAs in one, hoisted up similar to the 3DCAR and scans in both elevation and horizontally, electronically. Instrumented range is similar to 3D CAR.

 

[Blood+]

Then why is Arjun so heavy? Is it just because of the extra crew needing more room?

Pretty much.

As for APFSDS, rifled guns have difficulty as the fins themselves give stability and does not need spinning force to keep the ammunition aligned. Rifling interferes with the fin stabilisation. This is why most tanks use smoothbore. Also, rifled bored wear out quickly while smoothbore have long life.

Ok, so what?? How are these trivia even relevant to my question?? You said Arjuns CAN"T fire APFSDS rounds at all, which is demonstrably untrue.

 

[binayak95]

Pretty much.


Ok, so what?? How are these trivia even relevant to my question?? You said Arjuns CAN"T fire APFSDS rounds at all, which is demonstrably untrue.

yeh samej jangir ek number namuna hai. ignore and be at peace

 

[NoobWannaLearn]

Lmao

 

[Blood+]

yeh samej jangir ek number namuna hai. ignore and be at peace

Absolutely.

 

[Chinmoy]

Reason why I ask to not take this guy seriously.

 

[Chinmoy]

And unfinished.

That covered via Mk1a upgrade. But you can't shake off the fact that when it was conceived, we had basically zero infra to support it. On top of that, T-72s in 80's literally spelled doom for it in designing phase itself.

If only designers would have adopted the T-72 design in its initial phase itself, then might be instead of T-90s we would have seen atleast 500 Arjun as of today.

 

[Blood+]

That covered via Mk1a upgrade.

Not exactly, the flaws in the base design were never touched upon, not even in the so-called MkIA.

But you can't shake off the fact that when it was conceived, we had basically zero infra to support it. On top of that, T-72s in 80's literally spelled doom for it in designing phase itself.

If only designers would have adopted the T-72 design in its initial phase itself, then might be instead of T-90s we would have seen atleast 500 Arjun as of today.

Absolutely this. The only thing I would change in the T-72 design would be reposition the autoloader to the turret bustle. Oh and that gawd-awful gearbox, I mean less than 4km/hr of reverse speed?? Are you freaking serious??!! A bloke could even walk faster than that.

 

[Satish Sharma]

Not exactly, the flaws in the base design were never touched upon, not even in the so-called MkIA.

& Which were those design issues ?
Didn't Arjun perform better than t90 in desert. Even it's speed is better than t90.

 

[Chinmoy]

Not exactly, the flaws in the base design were never touched upon, not even in the so-called MkIA.

Apart from weight, every other aspect has been touched upon.

But yeah, the basic flaw of weight is still there in Mk1A.

 

[Satish Sharma]

Apart from weight, every other aspect has been touched upon.

But yeah, the basic flaw of weight is still there in Mk1A.

Arjun was initially conceived as 45ton tank then what happened? That it became a 62ton mammoth (67Ton for mk1a). Did army change requirements ??

 

[Chinmoy]

Arjun was initially conceived as 45ton tank then what happened? That it became a 62ton mammoth (67Ton for mk1a). Did army change requirements ??

PSQR was for 55 ton not 45 ton.
But it came out to be overengineered with 62 ton.

 

[Blood+]

Apart from weight, every other aspect has been touched upon.

Dude, what're you talking about?? The entire turret needs a drastic redesigning!! Plus, the hull ammo storage needs to go as well. Then there is the issue with the main gun and that huge-ass mantlet dead center of the front turret. And let's not even talk about the lower front hull plate. There are just too many issues with the base design that wasn't addressed in the MkIA, for whatever reason.

But yeah, the basic flaw of weight is still there in Mk1A.

No, not that. You want adequate level of protection on take with a 4 man crew, then you'll have to go THICC!! Look at the Abrams SEPV3!! So the weight itself is not that big of an issue.

 

[Blood+]

PSQR was for 55 ton not 45 ton.

Fear of the M1 Abrams, wasn't it??

But it came out to be overengineered with 62 ton.

You mean the MkI or the MkIA?? The MkI, as far as I remember, is 58.5 tons, no??

 

[indiatester]

Lmao

I would have given it the benefit of doubt for a while, But you guys were on it like that. You folks dug up even the kundli of their ancestors

 

[patriots]

 

[NoobWannaLearn]