DRDO and PSU's

In context of ground test run of HAL Warrior and it "lack" of stealth shaping and serrations, it could be that they will be added for the in-production vehicles and they wanted to fly & test out the "simpler" version first. But, it's possible that what I had been saying about the "fall" in importance of shapes and "rise" in importance of the materials (RAM, RAS, paints/coats) in stealth vehicles going forward is starting to happen.
Why would a designer pay the aero-dynamic penalties of "stealth-shaping" when some materials can give a -20dB (99%) reduction over a broadband C,X and Ku band and -10dB (90%) over the whole range of 38GHz band of frequencies?
So, low drag more manuverable designs with newer materials will be just as stealthy as older less kinematic performance designs with shaping.

I usually post about RAMs. But I have been reading up on Thermal Barrier Coatings (TBCs) lately.

I always wondered is there a limit to how much rising the Turbine Entry Temp (TeT) can increase performance and if there was an upper limit to it. In the CAPS talk, GTRE director talked about
"gas adiabatic temp of hydrocarbons in air". I looked into it, turns out 2220 deg K (1950 deg C) is the gas adiabatic temp of hydrocarbons in air. So, there is no point in hitting temp above this ~2000 deg C is the highest temp a gas turbine aero-engine needs to achieve.
In that context, I saw a research going on in IIT Patna where they realized a TBC which survives something near 2000 thermal cycles at 1800 deg C (2073 deg K) with no major problems (like spallation). There was also an interesting work on a bond-coat less TBC (lighter) with CNTs which also shows 48 cycles at 1800 degC.
 
economictimes.indiatimes.com

Armenia to tow Indo-French artillery gun system

India and France have developed the Trajan 155 mm towed artillery gun system. Armenia has chosen this system for its forces. Several subsystems of the gun were developed in India. Deliveries will happen in the coming months. Armenia is also getting Pinaka multi-barrel rocket launchers and Akash...
economictimes.indiatimes.com economictimes.indiatimes.com

1736990235314.webp


"The artillery system has been tested by the Indian Army and has met all qualitative requirements, including operations in varied terrains - from marshy plains to high-altitude cold deserts. However, it was not ordered by the Army after an earlier procurement plan was abandoned."
 
sameer said:
economictimes.indiatimes.com

Armenia to tow Indo-French artillery gun system

India and France have developed the Trajan 155 mm towed artillery gun system. Armenia has chosen this system for its forces. Several subsystems of the gun were developed in India. Deliveries will happen in the coming months. Armenia is also getting Pinaka multi-barrel rocket launchers and Akash...
economictimes.indiatimes.com economictimes.indiatimes.com

View attachment 21998


"The artillery system has been tested by the Indian Army and has met all qualitative requirements, including operations in varied terrains - from marshy plains to high-altitude cold deserts. However, it was not ordered by the Army after an earlier procurement plan was abandoned."
Click to expand...
Why no ATAGS?
 

View: https://x.com/AdithyaKM_/status/1879721518361710951

Army chief throws weight behind ALH, says it will remain workhorse​


“Let me assure the countrymen and my own Indian Army that the ALH has not hit a rough patch. These small accidents keep taking place. All over the world, even the best helicopters meet with such accidents,” he said on the sidelines of the 77th Army Day parade held in Pune

“In those 40,000 hours, only one glitch took place. And we are flying these helicopters at altitudes of more than 15,000 feet. The ALH is a workhorse, and it will remain a workhorse. We have 100% confidence in this platform,” he added.
Click to expand...

Aayein?:notsure:
 
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