Bharat Rakshak

Haridas

That is why decoys are deployed that are many times lighter than RV and can mimic its payload during midcourse , Latest decoys are not just lighter and mimic warhead in thermal and Radar spectrum but can survive re-entry too. Pray tell us how the lighter decoy can mimic the huge thermal signature w...

Haridas

ramana wrote:Mort, in this business only demonstrated capability is acknowledged.
So yes A-MIRV is next step. Even three good ones.

One of the initial weaponeer s told me the early design configuration exercise envisaged three flower petals of Agni2 rv for the final big fat astra.

Haridas

Entire China could soon be within India’s N-strike zone - Rajat Pandit, ToI There is, however, interest in ongoing DRDO work on developing "manoeuvring warheads or intelligent reentry vehicles" to defeat enemy ballistic missile defence systems, as well as MIRVs (multiple independently tar...

Haridas

ArjunPandit wrote:didnt p2 involve testing of Sub kt device for TNW?

Sub kt was to caliberate Eqn of State of verious fissile materials isotopes (except u235).
Now where all would one apply that ?
Make a system or a system of systems!

Haridas

Zynda keep it here for focus and continuity. A few questions to you: - 2024 is weldable? What is its fracture toughness strength? Looks like 1/2 of good steel like 4340 (24 vs 50). Yes 2024 is weldable. Al 6013 is more suitable, is welable and in addition stronger than 2024 & corrosion resistan...

Haridas

The exterior surface has composite elements thus weld marks not v clear, the weld line is however very clear on interior surface. Your arrow for weld line should point to the interior surface. BTW looks like high quality weld. One can see the part is not welded on all 4 edges. Just bottom and top (c...

Haridas

Ramjet engined Akash booster is made by a Drdo lab. The frikking thing burns (outside to inside) in a second or so. BRAHMOS booster could largely draw from it, it's ram engine needs are similar though less demanding.

Haridas

You can do geodesic and nongeodesic winding for pressure vessels and various other things like T bars etc. Other method is to layer sheets or tapes depending on the need. Tejas uses multiple layers of carbon fibre sheets. HAL stall at Aero India shows many composite parts for Tejas. One can see for...

Haridas

Thanks Vasu raya ji.

Haridas

Manish_P wrote:I was referring to the brave unknown (to me) co-pilot, Shiv ji.

Unless i have read the post by Deejay sir wrong, Air Commodore P Sharma, the pilot, is the brother of BRF poster Arun_S.

Yes, real brother.

Haridas

juvva wrote:
manjgu wrote:so whats the res of the latest cartosat2?
I remember some one mentioning 64cm in the post launch speech.....

Has got to be better than the resolution of the first experimental reconnaissance sat (65cm), the TES

Haridas

What will be more important is if 1. IAF is involved right from the start to the fullest extent possible One can take the horse to water but can't force it to drink if it does not want to drink. IAF has officer position that don't stay on the job more than one posting. Unless it now opens a new out...

Haridas

ISRO's record on air-igniting large solid core stages is patchy (see ASLV) and the only air-ignited solid stage ISRO has is HPS-3 (PSLV 3rd stage). Disha ji, 1. Could you please elaborate? 2. Since ASLV days (those were the days) ISRO has moved on to master more complex solid stages, so I would lik...

Haridas

Disha: thank you, as always clearly explained for everyone's benefit.

Haridas

DJ ji, will most likely have to go to Metcalf house, the clarks and section officers there are sleep loving babus.

Haridas

Indranil wrote:In fact, if Sc160+2S60s+C25 was supposed to be able to lift 3 tons to GTO, wouldn’t L110+2S60s+C25 be able to lift 2.25 tons to GTO?

Saar, calculate and thou shall know.
Zameen aasman ka fark hai SC160 aur L110 kay beech.

Haridas

Jaxa's Epsilon drove me to read a bit more about the H-IIB. Epsilon's first stage is H-IIB's booster (SRB-A3). SRB-A3 burns 66 tons of HTPB to produce a a thrust of 230 tons for 114 seconds. In our earlier discussion, you suggested that the proposed Indian equivalent would provide an equivalent thr...

Haridas

I don’t think Matheswaran Sir would hide and snipe. To his credit, he has been open about his stand in public. It’s not R Pandit either, because he is not an official.. Those who know him would not hold him to such high pedestal. Have met Maaty (his call sign) and known him for many years, so i thi...

Haridas

It had to be all solid to decrease fueling time etc on the launch pad if they want a launch campaign of 3 days Really depends on required precision for orbital insertion. Liquid upper stage allows for higher ISP and velocity correction due to solid fuel stages that inherently having appreciable V d...

Haridas

^^^ Seems to be converging. I see that fatter diameter is generally more MF efficient and scalable. As for 2.5m dia, dont see the drastic advantage, given that a nearby diameter is mastered and tooled up. Yes if dia has to change for say SLBM then all money used is good use.

Haridas

Of course. So your view of the rocket is 10 mtr-2.8 mtr dia first stage (S-60) tapering into a ~6 mtr-2.0 dia second stage (S-24), followed by liquid / solid third stage 2.0 mtr dia, followed by a fairing with a pointed nose. I think 2.8m dia second stage is more likely compared to 2m dia stage. Up...

Haridas

Ha ha..

hakim saab eating crow with all the non existance MIRV Mijjiles configs of India coming into reality from public sources

I also now see hakim has opened design your own nuke bum dukaan under MBBS hakim tutalege.

funny, but that is out of scope of this thread.

Haridas

It is not a concern. SLBM/ICBMs use similar aspect ratio, so controllability is not an issue. But the atmosphere is not kind to short and stalking things trying to move very fast through it. SLBMs as I sustpect you already know often use aerospikes to overcome this limitation, and the outcome is no...

Haridas

Well we don't have anything between the PSOMs and S139, so for a 100 ton rocket a new stage has to be built.. Is it new or modified depends on glass half full, as the booster is segmented and increasing or decreasing segments is evolutionary not revolutionary. The 2.8 mtr dia is very interesting (i...

Haridas

The proposed Second stage is a new thing and without expensive or extensive testing, it will not fly. I presume ISRO will continue with proven PS3 1 stage - S60 2 stage - PS3 - improved ?? 3 stage - PS4 - improved ?? Its glass half full.... One can alternatively treat it as an improvement, becoz 2n...

Haridas

What you are saying is that they can get the same performance of pslv-3s by not only removing the 2nd liquid stage (as in the 3s) but also removing over half of the existing first stage AND not using composite casing for the middle solid - what gives? Sir, I just did the first cut calculation for 1...

Haridas

Sure, cross the bridge when it comes.

Haridas

Cybaru wrote:Is the trainer longer in length than the single seater? can't find any sources on web that give its dimensions.

Iirc same length.

Haridas

^^^ pie in the sky dreams are easy mental stimulant but of no consequence. Export only possible after 120 a/c IAF order fullfilled, guess when Phillips saar? Now even if India has to export 20 A/C before fulfilling iaf needs it would be for very stategic compulsions (say Lanka, BD or Vietnam ), cost...

Haridas

IIRC the above configuration will have max aerodynamic stress at ~Mach 1.7 @~2.5 km altitude.

Haridas

Happy new year to one and all.. there is no better way to start the new year. https://www.drdo.gov.in/drdo/pub/monograph-emag/airworthiness-certification/index.html#page/1 if some one can get the full book they are lucky i think I have been trying to buy it for a while. All those monographs are ava...

Haridas

Indranil wrote:The LCA trainer is so easy on my eye.

Let there be more curves on the Mk2.

Two Air Commodores !

Haridas

Yes. ISRO engine nomenclature generally reflects approx fuel in the stage in tonnes. All-up wt of stage thus is more, depending on MF. I think the mini Pslv will be: 1. Booster 60 tonne, 2.8m dia, 9m long (2 segments instead of 5 segments of current pslv S139) 2. Second stage ~24 tonne, 2.8m dia, 5m...

Haridas

The PSLV 4th stage could possibly be used in single engine configuration for upper stage, though if only 2 solids are used in the lower stages might have to have better propellant mass fraction. That was my assumption too. Just scaled it to half the size. It's a He pressure fed liquid engine that i...

Haridas

^^^ Saar, just calculations. First feasibility validation; next form fitting based on available information from public or chaiwalla source. Reuse make sense when the rockets are comparable or just pure luck. If ISRO wants a rockets 1/10th the cost, 3 days to assemble, 1/3rd the weight and a very di...

Haridas

Isro's plan: A rocket that can be made in 3 days As per this ISRO is developing a 100t launcher which will cost "1/10 of original manufacturing cost of PSLV", payload of 500-700kg and will be ready to launch by end of 2018 or early 2019. Was there reports of this earlier or did ISRO just ...

Haridas

.... another approach is having a constellation of micro sats that provide near continuous coverage and in real time of the whole region. ISRO is experimenting with IMS-A, B and they also have the famed 104 sat launch under their belt, only if they can manage to put SAR sensors with good enough res...

Haridas

JTull wrote:ISRO to launch one rocket every month in 2018: Officials

contrast that with 15 ago when there would be dedicated thread on BRF for each pslv mission, and about 1 mission per year.

Any one has the Rocket simulator?

Haridas

sudeepj wrote: Su30 can do mach 1.2 with the Brahmos attached! its a beast!

shallow dive and fire in tailpipe.

Haridas

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