Bharat Rakshak

csaurabh

Panel pulls up space department for shelving fibre project Nearly 20 years after the Vikram Sarabhai Space Centre (VSSC) signed an agreement with the National Aerospace Laboratories (NAL) to develop T800 - a high-strength carbon fibre for space launch vehicles - a parliamentary committee has critic...

csaurabh

My take on T/W. I have asked these questions few time. Hopefully Maitya sir or someone will answer. T/W ratio is not really impacting overall weight as such. As you point out, LCA carries 4000 kg of weight. It can easily sacrifice 230 kg, If that means it can carry an indigenous engine. Anyway, wha...

csaurabh

https://x.com/shreedharsingh9/status/1893237701106696339 ---> GTRE is working on improving the thrust-to-weight ratio of the Kaveri engine. Now the T/W ratio is 6.5, it should be 8. To improve the power-to-weight ratio the internal temperature of the turbine must be high. GTRE is working with DRML ...

csaurabh

This year appears to be exceptionally bad planning. They are saying at the gate that they are not giving any passes, and the passes can be got online only. And the website registration is broken for the last few days, it says payment failed ( no matter which payment method is used ) Don't know if I ...

csaurabh

Well, let's be a little realistic here.. All bureaucrats get paid on time at the end of the month. They have no incentive to push papers. In fact, pushing papers is highly suspicious, as people will think they have something to gain by it. In government offices, everyone is watching each other. They...

csaurabh

Def Secy stating that we can't absorb funds is the fib of the century unless he was referring to small MSMEs getting sudden orders from AF. Fact is L&T, Tata, DPSUs would live mass orders, and we are short of R&D funds. To state otherwise is to ignore the reality as it exists where ATAGS ha...

csaurabh

I was hearing a lot on how miniaturization will make all but the manned or interplanetary planetary missions less reliant on development of bigger rockets, is that no longer the case? Number 2, even if reusability of first stage plays a key role in reducing the cost of satellite launches, is the de...

csaurabh

India's share of space activity is slipping in the face of exponential expansion by private companies like SpaceX. Even Chinese companies are also quickly expanding and evolving. I hope that Indian companies manage to get a foothold in the launch market, to do the same, otherwise we will be left we...

csaurabh

maitya ji - very clearly articulated.

Hopefully that will shut people up about fancy ideas of getting an M88 core from somewhere to fix the Kaveri and other such nonsense.

csaurabh

I was watching one of the defence youtube channels where they said that Kaveri is now performing almost same as GE404 engine, it's just 150 kg heavier. If this is true then we should straight up ditch F404 and use Kaveri. The Tejas has almost 10,000 kg of fuel+weapons carrying capacity. You can easi...

csaurabh

This is exactly what I was telling those like Alpha Defense and others who were saying that due to Dassault's large backlog, the Navy's Rafales couldn't be delivered till 2030 or so. I was insisting that if a company takes on an order it is their obligation to deliver on time or else penalties woul...

csaurabh

This is an excellent article. Wish our babooze and import pasand generals could show this kind of out-of-box thinking. Western air forces may be relying on converted airliners because they have a massive civilian airliner manufacturing industry in the first place.. which we don't have. So need not b...

csaurabh

What is the point of this without the engine. How can it be used in AMCA if the engine is being imported. Haven't heard of the 110 kN turbofan to be developed with a foreign partner for the AMCA? Engine to be developed with a foreign partner is a very vague idea at this point. But even if that is t...

csaurabh

Half of the things (68 billion $) we import is electrical, electronics and heavy machinery items.That means we need to some how find private investment to manufacture these things locally. I would have thought after Galwan, we would have reversed this trend somehow. We have not done that. Our consu...

csaurabh

https://www.msn.com/en-in/news/other/iisc-bengaluru-develops-indigenous-fuel-injector-for-fighter-planes-to-be-tested-on-amca/ar-AA1ul1tc?ocid=msedgntp&pc=U531&cvid=379cc759466543fab22cb68d10b41a85&ei=15 IISc-Bengaluru develops indigenous fuel injector for fighter planes, to be tested o...

csaurabh

"We transform carbon dioxide into sustainable aviation fuel" This is very interesting tech, Haresh ji, 1000+ barrels a day in California! India can use this tech and garner carbon credits to drive the costs further downwards. Each Indian coal plant in the nation can feed their CO2 and pro...

csaurabh

https://pbs.twimg.com/media/GNXQmrxWQAAMzC0?format=jpg&name=medium https://economictimes.indiatimes.com/industry/telecom/telecom-news/india-to-begin-producing-t100-carbon-fibre-in-2-5-years-v-k-saraswat/articleshow/109978486.cms?from=mdr There's no such thing as 'T100' carbon fibre. The TXX des...

csaurabh

I thought this was pretty impressive: Printing Parts with Liquid Metal https://www.youtube.com/watch?v=H93W-CiOT4A Looks awful, a basic pipe bender plus some welding will produce much better aluminium struts to be used in furniture probably in less time. This is essentially a casting process but le...

csaurabh

Explained beautifully. It's amazing that so many highly educated people in India are unable to understand this. Well to be honest, 'educated' or otherwise, most people simply don't know the circus of the public procurement system. I myself didn't until I became part of it. The other major problem i...

csaurabh

Would not compressed air leak out more whereas water uncompressed would leak less? It's getting OT but: 1. If a tank is designed to be pressurized, it will be designed to not leak gases 2. If a tank isn't supposed to be pressurized, it should be strong enough to withstand the load whether water or ...

csaurabh

I think the article is misleading. There is a reason why you may want to fill up the missiles with water and that is to prevent the missiles from buckling under the payload weight when they themselves are empty of weight/fuel. The reason the missiles are empty of fuel is because they couldn't make ...

csaurabh

Thanks for confirming my assessment. Converting technical capabilities to indigenous subsystems requires a national mission. Unfortunately our ordering process focuses mostly on costs, so favours suppliers who've already monetised their research costs. There's no incentive to develop unless the end...

csaurabh

ISRO/DRDO/etc have been trying to develop some CAD/CAM/simulation softwares for decades. Nothing much has come from it other than some internal codes for specific purposes (eg. Computational Fluid dynamics ). But nothing that is like a commercial software. ... I am aware of this Autolay thing. I do...

csaurabh

^^Yes I can partly confirm to the point of paper 2D drawing being replaced by computer 3D modelling. Having seen first hand, my father-in-law standing for hours and drawing for HAL, we have moved or should I say leapfrogged. Did DRDO/HAL develop their own 3D software or did they use SolidWorks whic...

csaurabh

Yet I also find it bizarre that we can't develop such technology ourselves. This shouldn't be some super-difficult thing to do. I don't know why we have to boast and brag that we are a space power, when we have to buy anything and everything from abroad. We can do this stuff more cheaply. Unfortuna...

csaurabh

What is a hybrid rocket and what are the green propellants used? I don't see any info about this on their website either.. Hybrid rocket means that it is a hybrid of liquid rocket and solid rocket. Typically it means using a solid fuel and liquid oxidiser. Virgin Galactic uses hybrid rocket in its ...

csaurabh

https://x.com/alpha_defense/status/1729393639703662716?s=20 ---> 𝗜𝗡𝗥 𝟱𝟱𝟴𝟵! Rs 5589 was the difference in the price between Acoustics India Pvt Ltd and BaE-HAL Software Ltd bids for the role *Senior Domain Expert*. https://x.com/Tej_Intel/status/1729136458542522424?s=20 ---> Imagine a company has to...

csaurabh

Tis great on appointment. I however feel that all retired ISRO people have a ton of stuff to contribute. The GOI should retain them (the leaders and people with solid contributions) in some advisory capacity on Space. They can chart out future stuff and also provide youngsters in ISRO their knowled...

csaurabh

Lots of Info about Selection of Build Materiel for STARSHIP I don't want to get into a debate of Stainless steel vs Carbon Fibre Composites. Both are good, depending on the application. Rather my problem is with Elon Musk in general and Starship in Particular. Elon Musk has made a list of extraordi...

csaurabh

Elon said the following on usage of stainless steel by Spacex in starship instead of Aluminium/carbon fiber: Carbon Fiber Composite: 1. Costs 130$/kg 2. For Starship needed a huge autoclave (9 meters dia, 70 meters length) 3. Composites are porous to hot gases, needs an inner liner which adds to co...

csaurabh

https://swarajyamag.com/infrastructure/railways-float-bids-for-procurement-of-19-modern-rail-testing-cars-for-detection-of-track-defects The tender has been floated with the requirements like the manufacturer having supplied SPURT cars in multiple countries and having an experience of testing more t...

csaurabh

In a more positive news, Cabinet has given nod to Indian Space Policy 2023...the aim is to encourage Pvt Sector in activities such as satellite design & even launches while ISRO will focus on advanced Space related R&D activities. I am pretty sure there will be a lot of hand-holding from IS...

csaurabh

Let's put things in perspective here.. China does 40-60 launches a year, some of them really heavy ones. We do 4-6 . China has a space station in orbit and rovers on Mars, things we can only dream of China has a massive pool of talent in R&D for aerospace and defence research, while we run after...

csaurabh

Commercial aviation (and by extension engines for it) is a much bigger deal than military aviation. Moreover converted versions of passenger aeroplanes are used for military transport, refuelers, awacs, etc. However as a country we have invested into developing fighter aircraft and some helicopters ...

csaurabh

Amber G., you measure the institution's success by the success of its students/graduates. In other words, the student/graduate is the 'product'. By that measure, I am also a successful 'product' of IITK. Also I am a successful 'product' of my school and coaching institution. It could be argued that ...

csaurabh

US funding to Indian academia would make it even bigger of a disaster than it currently is. Already as it is, Indian scientific endeavour is totally stymied by the need to generate 'papers' approved by 'international publications' which is mostly controlled by US and EU. Any kind of indigenization o...

csaurabh

What the flying-f@$%! We have China breathing down our necks & the Forces have spent only 52% of their Capex in 2022-23. Why? Because cannot place orders with Russia Here is a novel idea - how about ordering indigenous weapons? https://swarajyamag.com/defence/defence-just-50-per-cent-of-the-all...

csaurabh

Some news from my alma mater IIT Kanpur... (Similar news items from other IIT's and premier institutes in India) As the placements season kicks off - I - Impressive! ₹40,000,00 (~$500,000) starting salary+comp for a fresh graduate from IIT Kanpur. IIT-K student hits record ₹4 crore placement jackpo...

csaurabh

Can somebody remind me, which verse of Veda says that or for the new age people, what article of the constitution? We are not a country governed by Vedas or constitutions. We are governed by 'Circulars' and 'Notices' issued by random petty bureaucrats. It is a a legacy of the British raj that we do...

csaurabh

Jet pack i don't understand. But robotic mules make a great deal of sense. No, they don't. It has been proven conclusively that conventional mules (ie. of the horse variety) are simply superior to robotic mules in every way. IC-engine based mules make a ton of noise, and battery powered ones just l...

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