Bharat Rakshak

Kuttan

Thanks, Vikram. I stand corrected. (Maybe the author ran away before seeing the last part: how the last tank was actually knocked out) http://www.bharat-rakshak.com/ubb/smile.gif http://www.bharat-rakshak.com/ubb/wink.gif I also remember reading that all they ever recovered of Abdul Hamid was one...

Kuttan

Vikram: Please see Shiv's and my recollection (Shiv may have more hard data) from the newspaper reports in 1965, of the citation for the Param Vir Chakra. I doubt if the Param Vir Chakra is awarded for merely firing one's weapon until one gets blown up: in that case, 3000+ PVC (posthumous) sho...

Kuttan

<BLOCKQUOTE>quote:<HR>Grenades cannot destroy tanks <HR></BLOCKQUOTE>Thanks, SBajwa. Now I understand why, after the 1965 war, there were enough Patton tanks and US-built APCs to distribute around the country, so that even I could pl...

Kuttan

dsandhu: <BLOCKQUOTE>quote:<HR>QMH Abdul Hamid received the PVC for his role at the Battle of Assal Uttar not Chamb. <HR></BLOCKQUOTE>Thanks for the info. My understanding of newspaper reports in 1965, at an age expressable in si...

Kuttan

I too saw the movie very recently, but had read about it and the battle long ago, and also remember reading about the battle itself in 1971. My questions regarding the movie, (forget the emotional stuff), are: 1. Is it realistic that tanks line up abreast, with no cover, and the infantry rush ...

Kuttan

Shiv: no disrespect intended towards your brave relative who fought at Longewala! Duty in the Hunters must have been particularly brutal: many Hunter aircraft went down during that war, many of those inside enemy territory. I just thought the IAF account on the web is a little too "gung-ho"...

Kuttan

Thanks, Shiv. Now I like the movie better than the IAF account....

Kuttan

Hi Badar!For the latest in fighter technology, I can now reveal the latest in air combat tactics, based on extensive hands-on experience with the Jane's Authoritative F-15 simulation: if chased by missiles, fly F-15 straight into the ground: it bounces back with no damage, according to this fine ...

Kuttan

There was an article in India Today, circa 1998, when the movie came out. I did see the movie recently: liked it much better before I saw it. The concept of trying for realism appears to be unknown to Indian movie-makers. Probably, the version as presented sells much better than reality. In gener...

Kuttan

Without losing much mobility, jeep-mounted weapons, or weapons mounted on tracked all-terrain vehicles, may offer much better return on investment: these systems can also include radar and other sensors, and offer better launch stability. The man-portable is basically a terrorist weapon, or a hel...

Kuttan

Yogeshwar: Regarding Vermiculite: All I have heard of this is that when we dealt with a certain large aerospace company, the contract included a big stipulation that 'VERMICULITE SHALL NOT BE USED IN PACKING" any of the stuff sent to them. I had to go around asking what this stuff w...

Kuttan

Ashok: That was very nice, thanks! Worth many hours of searching textbooks and doing calculations. I believe the radar wavelengths are of the order of millimeters (is that right? I see references to "millimeter-wave radar" ?) The radius of curvature of a sharp edge is also of the ...

Kuttan

Hey, experts, I need some technical advice. I have acquired a copy of Jane's F-15 and the combined F-16/MiG29 pack, from the local CompUSA/OfficeMax. Now my questions: 1. Is Jane's F-15 actually accurate in flight dynamics, etc.? 2. How about the F-16/MiG 29 pack (not Jane's, but I expect ...

Kuttan

Best book on basic engg. aerodynamics is by Bertin, J.J. and Smith, M. , "Aerodynamics for Engineers" I think its Prentice-Hall. Advanced aerodynamics of supersonic planforms etc.? By far the best are: 1. R.T. Jones, "High Speed Wing Theory", originally published by Princet...

Kuttan

<BLOCKQUOTE>quote:<HR>many other 'fast' aircraft have low sweep angles<HR></BLOCKQUOTE>Sure, Salman, and many very slow ones (Learfan)have high sweep angles. On the fast fighters, the compromise is one of the following: 1. High...

Kuttan

Hi Salman: Unfortunately, its curfew time for me. Try to get this thread back to the issue of stealth, please: I am curious as to WHY corners scatter so much, and why the radius of curvature (1/sharpness) of the corner matters. In laser scattering, the actual phenomenon is supposed to go somethin...

Kuttan

BTW, In accordance with policy, all numbers are approximate, since I have not measured the sweep of the wing planform, or the geometry of the nose. The wing camber will affect these things somewhat. Otherwise, the phenomena should occur in about the ranges indicated, including the wing rock, which m...

Kuttan

Here's the rest of my problem with the LCA as the next-generation airspace defender: 1. It has leading-edge flaps, I assume, but very few other controls. Yes, they claim thrust vectoring, but this is the most risky of all the technical claims. I read that the thrust-vectoring nozzles need some ex...

Kuttan

<BLOCKQUOTE>quote:<HR>How do you determine the design mach number by looking at the planform?<HR></BLOCKQUOTE>This is sure to lure Salman out with a nasty comment, but here I go anyway: Find the sweep angle of the leading edge. In...

Kuttan

Badar: Thanks for the planforms posting. I take back what I said about vortex lift: the inboard section has lower sweep. I have to go back to claiming that this is an extremely simple planform, almost like someone said: "go design me a generic platform for a technology demonstrator. Do...

Kuttan

Badar: Regarding chin inlet vs. side inlets. 1. Have not seen any aircraft with max Mach number above 1.8, with a chin inlet. (Maybe F-16 XL is designed for more; not sure). It is not convenient to incorporate variable geometry into a chin inlet, I suppose. For Mach 2 and above, variable geome...

Kuttan

<BLOCKQUOTE>quote:<HR>why not a direct feed of the two airflows (not merged by a Y-joint) straight to the engine face? <HR></BLOCKQUOTE>My guess is that this will cause much worse differences between the left and right sides of the f...

Kuttan

<BLOCKQUOTE>quote:<HR>what about the human eyeball Mk I, it is still a potent sensor. What about visual LO?<HR></BLOCKQUOTE>Quite right. I read in one of the books that I read (pure fiction as opposed to the books that you guys read)...

Kuttan

<BLOCKQUOTE>quote:<HR> If this happens does it not lead to a pressure instabilities that could result in engine stalls?<HR></BLOCKQUOTE>Yes, but if you don't, then the engine will be starved of air flow when you make either a left tu...

Kuttan

The thread that you refer to, was posted by ahluwalia, and contained an article titled: Re-Arming India's Armed Forces". I think there were few takers at that point, but that was what got me thinking that we needed to bring out what was known / could be inferred about stealth from the open lite...

Kuttan

Thanks! I too wondered about the gold shine of the F-22 canopy from certain angles, but thought that maybe gold was cheaper than the stuff they used to paint the rest of the aircraft. Makes sense that the cockpit contains lots of irregular surfaces.

Kuttan

Ashok Kumar: From the British article I read on BR about the plasma sheath business recently, I got the feeling that it was mainly an ad for this book that the British were selling, about Russian technology. A few years ago, while there was still a Soviet Union, disintegrating, I had the pleas...

Kuttan

What a relief to be back on a high-speed line! My exclusive-access system crashed on Friday evening (ECM burst, no doubt!)When you are stuck on a line that disconnects every 3 minutes and runs at 1baud, and you are facing a Salman who is getting irritated, its like being in an LCA with a 1st-gene...

Kuttan

Thanks for the info on the IEEE article and the web link (I'll have to check out the "baffles radar" part from a faster internet link). So, it appears that there is something to the angles of around 55 to 58 degrees: they are angles at which radiation might skim surfaces or get trapped ...

Kuttan

Satya: Let me try to answer that, and then Salman et al will tear into my answers and then we can both learn. Even I can do the conceptual design for a fighter plane, and reduce it to expected performance measures such as range, max. speed, max. altitude, max. payload, turning radius, etc. Wi...

Kuttan

Thanks, Dinesha. I'll look at the Discovery page. Ashok, I know of the Brewster angle only from laser optics, so I was just shooting in the dark. Maybe you can tell us if the 55-degree angle of most of the surfaces, and a 47-degree wing sweep angle of the F-22, have any significance for the radar...

Kuttan

I know this must have been a topic several times before, but perhaps it could be revisited since the article "Rearming the Armed Forces" posted on BR a few days ago cited Stealth as an urgent technological need in the IAF. Also, the SSN and other threads like the Akash/Rajendra are getting...

Kuttan

Very informative thread. Are you folks not worried http://www.bharat-rakshak.com/ubb/wink.gif that "Khan-baba" and his ilk may use these complicated mathematical expressions and figure out why the Ghauri keeps moving downwards rather than upwards when they light the top end?For example,...

Kuttan

Prof. Raghu: I have heard of G.G. Ponnambalam, but was too young to know who he was. On my few visits to Colombo, the zoo and prospect of ice-cream far superseded my interest in history. Don't know about the statues: I do think one was of Dudley's dad, riding a horse (he was some Governor-General or...

Kuttan

Johann, Raghu, this is delightful (though not exactly a painless topic) because I am filling gaps in a subject of intense interest. I did not want to detail the '80s in Sri Lanka because I had little direct knowledge, and I thought my statements would appear very biased: I've never met anyone who sh...

Kuttan

My perspective on Sri Lanka is that of a kid in central Ceylon in the 1960s, and then the natural interest of following events. The Sinhala people have been in three minds as to whether they are "a little bit of England" (with some cruelly substituting a pair of letters for "b"...

Bharat Rakshak

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