Bharat Rakshak

Arya Sumantra

RIP sir. Unfortunately the losses of Bharat's Navratnas have always come at crucial moments for the country.

Arya Sumantra

you are still assuming the aircraft is tethered - and your forces are acting on the tether point the way to think about flight mechanics is that the COG is the 'tethering point' - all motion is relative to it That is equivalent to saying that relative position of control surfaces and their geometry...

Arya Sumantra

1. The fundamental mistake in your description is that pitch axis doesn't pass through the CG! In reality the pitch axis passes through the CG. A plane in air is not tethered so if you create a moment it will always turn around its CG. Therefore all the three axises of freedom (has to) pass through...

Arya Sumantra

Talking about the wake and separation wrt Tejas, here something from an incident between two F15s

“As a general rule that’s(separation between fighters in combat time) 500 feet” at 1:13 secs

F15 crash
http://www.youtube.com/watch?v=aWdpwkzK ... re=related

Arya Sumantra

Gurus, I have a few questions embedded within a hypothesis. I have been comparing Tejas with Mirage 2000 which is a similar single engine delta fighter and yet is devoid of issues like alpha. I have also been observing some of the videos of vertical loops by dogfighters and multi-roles. A vertical t...

Arya Sumantra

Here’s one possible solution Buy X number of Eurofighter and Y number of Mig 29K for IAF. First the IAF should used them and as Tejas production stabilizes start sending them to IN for use on IAC. Eventually in long run even IN should replace them with Naval Tejas and Naval 5th gen. Thus an interim ...

Arya Sumantra

x-posted from China Military Watch thread from the rear aspect, the J20 seems to have about as much concern for LO as the Tejas Mk1..which is minimal. the Tejas being much smaller, no elevator fins, one vertical fin, no ventral fins, will actually have a smaller RCS from the rear aspect probably. wi...

Arya Sumantra

After wondering whether to post this late or not, I finally give in to try an attempt How many aircraft would be appropriate for a wartime CAP to protect an air base Here’s an overly simplistic static force balance with lot of generalization. For two front defence http://i54.tinypic.com/14wrbio.jpg ...

Arya Sumantra

Modern fighters would not be detectable until too late and in any case would be undetectable over 300 degrees of a circle - outside the 60 degree arc. Blind spots for some areas will always be there in any radar not in the nose. How about the L-band emitters in Pak-fa's wings ? Although there seem ...

Arya Sumantra

Mig 21 has a nose cone base of about 46 cm dia and russkies offer a Kopyo radar that can fire R77, good enough for trainer pod, although it is a pulse doppler type

Arya Sumantra

It occurs to me that many active radar guided missiles right from the 1950s have had their own seeker and compact seekers are available for police cars and small boats. Why not use a missile seeker as a radar? Active homing aams have transceivers(transmitter-receivers) but afaik even these aams are...

Arya Sumantra

Shiv, the plan is to mount it on the spine of the Mig-29k, one mount point behind the pilot and the 2nd mount point somewhere close to the tail piece, not as a under slung pod probably a single seater, the 8-9 metres is like the length of the brahmos which is shown to easily fit between the intake-...

Arya Sumantra

A radar pod would be something intermediate between a litening pod dia and a drop tank dia. I was doing a comparison of the base diameter of the nosecone of the Bundaar, J-10 ad Tejas and got a figure of something like 80-100 cm for all (can't recall the exact figure) I am guessing that at least a ...

Arya Sumantra

True Shivji but it is not an alternative location to those which already have a big one in the nose. It would be good to have one on radarless AJTs and IJTs with bvrs/wvrs slung on them to fall back on in desperate times atleast roles like defending rest of the country when all the main fighters are...

Arya Sumantra

So according to me 1. LCA MKII is not a medium fighter Nobody puts the most powerful 4th gen engine in a plane to make a light figher. MK1 is understandable perhaps because its intakes are small and other limitations put some restrictions. But for a plane that is being redesigned, MK2 with a 98kN e...

Arya Sumantra

Is it that every time you edit your post the post gets sent again to those who receive br posts by emails ?

Arya Sumantra

Gurus, Just like we have a litening pod, is it possible to have a radar pod for planes without radars such as trainers etc and sling them with a2g munitions and bvr aams ? The pod could also be slung onto aerostats(like the one drdo made recently) etc as a payload perhaps. Also it could be useful fo...

Arya Sumantra

We are still lucky that we are a country with lower costs in manufacturing, designing and r&d. But self-reliance is important for everyone. Are the critics telling us that we would not have been into this if not for low costs? Its our own even if the costs were not competitive. That our costs ar...

Arya Sumantra

Since the only new information you are able to bring on board is a query about my alma mater which you believe is a madarsa , the weight and validity of your argument has not changed but its direction has veered off topic. Nope, not referring to your alma mater, rather a balance operating on madars...

Arya Sumantra

Have you managed to find out how many missiles per sortie were carried on average for NATO/US CAP? What for? Let’s see the hole in the history you are deriving parallels from. Uncle and nato braced themselves for numbers game in standoff against russkie and (now)dragon fighters. BUT they end up fig...

Arya Sumantra

4 aircraft carrying 4 missiles each will be more agile and have greater ability to loiter than 2 aircraft (of the same type) carrying 8 missiles each, and those four aircraft will require more resources to shoot down than two heavily laden aircraft. To me it would seem like a far better idea to hav...

Arya Sumantra

With zero kills and probably hundreds of sorties and thousands of hours of flying , using up fuel and airframe life, how many missiles would be the appropriate number to carry per CAP sortie? Why use a wrong analogy? Actionless sorties were there in uncle-eeraq conflict because uncle had total air ...

Arya Sumantra

Look at the figures carefully: 30,000 sorties, 210 kills: This means that the likelihood of a kill per sortie is 210/30,000 i.e 0.7 percent The meaning of that is that there is likely to be one kill after about 150 sorties. 149 will have no kills That would be a misinterpretation. Any AF would cont...

Arya Sumantra

The plane we make will not be as stealthy as the F-22 or F-35. It's engine will not be as efficient. Its range and payload will not be comparable. But it will be ours. If we can take pride in making something on our own without cursing each other for being incompetent bums who cannot match US/Russi...

Arya Sumantra

OK. But if exposing a compressor face directly so that it is visible from the intakes does not make all that much of a difference because of reflections along the walls - why is such a song and dance made about visible compressor faces? Because you want to avoid any direct reflections(highest inten...

Arya Sumantra

Congrats to all involved with Tejas. Hopefully a high production rate facility with commonality/flexibility to fabricate mk2 & amca subsequently from same unit will be set up. And may GoI allot a higher sanctioned fleet strength for IAF if the fighter bought was indigenous. A big salute to the e...

Arya Sumantra

The entire compressor face cannot be seen except in a small cone represented by the blue shaded triangle. It appears that part of the compressor face will be seen in front of and below the MKI. The "cone" where part of the compressor face will be visible will be 35 km wide at a distance o...

Arya Sumantra

Arya saan, that jet is IIRC the 35 UB the camouflage and the bort number 305 was allocated to the twin seater SU 35 UB and the other flanker in the vid seems to be the RUAF SU 27 SM upgrade of the basic Flanker... Su35 UB with a canard is indeed difficult to distinguish externally from a mki. The l...

Arya Sumantra

^^^ Not sure about movie. Inspite of the title it is actually Su 30 and not 35. It's got canards. The missile dodging part is indeed CGI.

Arya Sumantra

Austin wrote: Great Video of MKI in action

This one takes the cake. Low ground clearance overflight at 3:05 is awesome

Arya Sumantra

One more guess scenario: because of the lengthened stage, the play in the cables got reduced. As the vehicle passed through high aerodynamic stress the vibration of the vehicle caused the cables to flap and pulled out the connectors from the mating connector. Or it could be Resonance build up of vi...

Arya Sumantra

Beyond a certain population size, a country is forced to stick to low-value added and higher numerical employment sectors so that its huge crowds can remain employed. This means it's currency is forced to remain low in value to remain competitive. In higher value added work, the profits are greater,...

Arya Sumantra

Yes you would be right if you had to produce x Newtons of lift from the body. Generally it goes the other way. After you design the fuselage, you say, I am getting x Newtons of lift. That's surprising. Because the weight of plane and payload it would have to carry is pre-decided as requirements pri...

Arya Sumantra

From China Military Watch thread: quote="Austin" "What are the disadvantage of lifting body design over design like J-20/F-22 that uses classic wings for lift ?" If the fuselage body also generates lift besides the wings then isn't it a constraint for fuselage side profile shape?...

Arya Sumantra

If you're going to put this thing on national TV, showing a jet in yellow primer just doesn't look quite as good. That's not the point. The reason is when you show off your plane with unfinished surface with panels and rivets exposed, the quality of your machining and finishing gets exposed to all....

Arya Sumantra

why stealth is required to defeat stealth. Stealth is not required to defeat stealth. What is required is to expose what is hidden by stealth. Like mutually assured destruction works for deterence. Somewhat deterrence is achieved by enemy seeing you as equal once you have similar capability and ene...

Arya Sumantra

Is 6 months of cheaper supply of oil worth "XYZ" amount of trouble for India, say shutting out of Iraq oil or restrictions on outsourcing or black listing companies like ONGC, Reliance? What will our counter response be? The front companies need not be ongc or reliance. And it isn't as on...

Arya Sumantra

What are the disadvantage of lifting body design over design like J-20/F-22 that uses classic wings for lift ? If the fuselage body also generates lift besides the wings then isn't it a constraint for fuselage side profile shape? Merely a flat underbelly will not make fuselage lift-generating. Just...

Arya Sumantra

But what's the harm in buying as much as we can with INR ? Even if mere 6 months supply is bought in INR that means that much of foreign exchange saved. If after that this trade stops for whatever reasons of instability in that region, we still would have saved some bit.

Arya Sumantra

the 50m cep @ 600km for DF15c target test grid in the 2nd artillery link above indicates indian airbases in north and east india can and will be targeted with BMs. SAMs are useless against the reentry speed of this class of missile, I am not even sure it falls in the PAD engagement envelope. perhap...

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