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by Arun_S
09 Nov 1999 08:44
Forum: Mil-Tech Archive
Topic: Agni -> Surya?
Replies: 21
Views: 9527

Re: Agni -> Surya?

Yes, I will send the program to BR members requesting it. <B>BUT </B>currently I have developed it on VB 4.0 (very old), & run it on Windows-95 only. So let me test out it's inter-operability with Windows-98, before I send it & later get flooded with complain of run-time problem. Not to ment...
by Arun_S
05 Nov 1999 13:14
Forum: Mil-Tech Archive
Topic: Agni -> Surya?
Replies: 21
Views: 9527

Re: Agni -> Surya?

<B>Interesting Agni-II range enhancement by staging the last stage. </B><P>If the last stage is split into 2500 Kg & 1500 Kg segments (assuming 0.85 mass ratio can be retained on both new segments; which is quite a challange), then on a 500Kg payload the range enhancement is from 2948 Km(injecti...
by Arun_S
05 Nov 1999 00:35
Forum: Mil-Tech Archive
Topic: Agni -> Surya?
Replies: 21
Views: 9527

Re: Agni -> Surya?

<I>>>What is the range of Agni-II with RV(500kg)+payload(500kg) factoring in rotational and centrifugal effects? </I><P>Yes the rotational & centrifugal effects are accounted for. <P>The program is still in my home computer, so I can not run it now to get the acutal figures. However the number t...
by Arun_S
04 Nov 1999 15:02
Forum: Mil-Tech Archive
Topic: Agni -> Surya?
Replies: 21
Views: 9527

Re: Agni -> Surya?

OK. <BR>I have only run some basic trajectories. The priliminary result is that the best range is on A-3 configuration, and that all PSV-3 based configns (i.e. P-1,P-2,P-3) are inferior, mainly due to the lower thrust rating at launch. <P>The better of the above give max speed of ~ 5km/sec and range...
by Arun_S
02 Nov 1999 23:28
Forum: Mil-Tech Archive
Topic: Agni -> Surya?
Replies: 21
Views: 9527

Re: Agni -> Surya?

I would be glad to share the program. <P>I am also looking forward to someone to volenteer to audit the calculation scheam.<P>I need to add a confign GUI to the program so that user can specify parametrs for as many stages, without requiring to modify the code to initializ various parameters.<P>As f...
by Arun_S
02 Nov 1999 14:50
Forum: Mil-Tech Archive
Topic: Agni -> Surya?
Replies: 21
Views: 9527

Re: Agni -> Surya?

OK, now I have factored in the effect of earth's rotation & centrifugal force, which tend to improve the range.<P>I am yet to factor in for air drag, and shallow glide. For the time being I am assuming that these two opposite factors cancel out each others effect.<P>Thus now the Agni-II confign ...
by Arun_S
02 Nov 1999 12:19
Forum: Mil-Tech Archive
Topic: Agni -> Surya?
Replies: 21
Views: 9527

Re: Agni -> Surya?

OK. Bare with me for relatively modest incremental progress. Please note that I am not a aerospace engineer by profession, just that I have some credible intertial navigation experience.<P>So now I have the 2 stage rocket ballistic software (prototype) ready. <P>I am yet to factor in for air drag, c...
by Arun_S
01 Nov 1999 08:55
Forum: Mil-Tech Archive
Topic: Agni -> Surya?
Replies: 21
Views: 9527

Re: Agni -> Surya?

I have just finished writing a prototype program to compute missile trajectory. I need to generalize it for muti-stage rocket.<P>As against the simpler analytic equations, this S/W currently accounts for effect of gravity on true launch lift, as well as the effect of steady boost phase as against si...
by Arun_S
28 Oct 1999 10:26
Forum: Mil-Tech Archive
Topic: Agni -> Surya?
Replies: 21
Views: 9527

Re: Agni -> Surya?

Can someone now use the equation to get prlim range enhancement estimates for Agni-II by staging the Second rocket into two ?<P>Appriciate your initiative. I would have done it except that I am on the road (in Japan).<P>The next step would be be look at Ramana's list for viable combinations to fit I...
by Arun_S
20 Oct 1999 02:46
Forum: Strategic & Security Issues Archive
Topic: Strategic Folder III-A
Replies: 31
Views: 14417

Re: Strategic Folder III-A

<I>>> Cryogenic engines have a large significance. Since, India has succesfully lauched the PSLV-C2 (which requires cryogenic engines) it means that we have the technology as well as the means to make ICBMs.</I><P>Not correct. PSLV does use a Liquid Fuel stage(Vikas), but that stage is not cryogenic...
by Arun_S
11 Oct 1999 12:09
Forum: Nuclear Issues Archive
Topic: Yield of Pokhran II ?
Replies: 37
Views: 15292

Re: Yield of Pokhran II ?

Excerpt from <A HREF="http://www.bullatomsci.org/issues/nukenotes/so98nukenote.html" TARGET=_blank>http://www.bullatomsci.org/issues/nukenotes/so98nukenote.html</A> <P><I>Nuclear stockpiles. We assume that there are proven Indian plutonium designs for a two-stage thermonuclear weapon, a st...
by Arun_S
07 Oct 1999 01:50
Forum: Military History Archive
Topic: Question on 1971 war and Mumbai blackout
Replies: 18
Views: 15211

Re: Question on 1971 war and Mumbai blackout

In 1971, my father was posted in AF-Poona(Lohgaon) flying the 3 finned Superconni of No:6 (Dragon)Squadron, for Navel-Recce & transport. <P>He was on standby duty even when he was at home, and used to fly mission all odd hours of the day (to date I do not know of the mission details. I suspect m...
by Arun_S
09 Sep 1999 01:34
Forum: Mil-Tech Archive
Topic: MiG-21-93 firing trials
Replies: 8
Views: 6915

Re: MiG-21-93 firing trials

Just calibrating the discusssion:<P>>><I>The range cited were for drone-sized targets. Fighters will have considerably greater RCS.</I><P>Target Drons are used weapons test simulate both the filght profile and the radar RCS. Such drones carry RCS enhancing reflectors (90 degree between 3 reflector s...
by Arun_S
18 Aug 1999 03:22
Forum: Nuclear Issues Archive
Topic: N-Doctrine: Discussions Only. Please no news posts
Replies: 22
Views: 11652

Re: N-Doctrine: Discussions Only. Please no news posts

For effective Second Strike capability, I do hope that India has a secret DRDO factory to churn out hundreds of Agni & Prithvi decoys/dummies to move around the country just like the real ones. Given the poor record of secret keeping, these decoys must look and feel like the real ones to oridina...
by Arun_S
18 Aug 1999 03:15
Forum: Nuclear Issues Archive
Topic: N-Doctrine: Discussions Only. Please no news posts
Replies: 22
Views: 11652

Re: N-Doctrine: Discussions Only. Please no news posts

>><I>A question: Is it possible to engineer a multi-purpose device? Ie, a fission core and boosted fission _and_ second core fusion? Or does is one limited to fission->boost and fission->fusion and not fission->boost OR fission->fusion? </I><P>IMHO, given high cost of Fissile Material and India's re...
by Arun_S
18 Aug 1999 00:40
Forum: Nuclear Issues Archive
Topic: N-Doctrine: Discussions Only. Please no news posts
Replies: 22
Views: 11652

N-Doctrine: Discussions Only. Please no news posts

<B>Indian Nuclear Doctrine: Discussions Only.</B><P><I>Please do not post any news items on this thread</I><BR> <BR>I had been awaiting Ramana to start the new thread. But I could'nt wait to raise few questions on the new Nuclear Doctrine.<P>So let me start with the previous post from Ramana. <P>---...
by Arun_S
17 Aug 1999 23:29
Forum: The Kargil Archive
Topic: Kargil Impressions - Trip Report
Replies: 9
Views: 18549

Re: Kargil Impressions - Trip Report

As I said before in another thread. You are just in time ! <B>Welcome back.</B> <BR>Looking forward to some good discussion on the new Nuclear Policy.<P>Cheers -Arun Sharma