Indian Missile News And Discussion

[Arun_S]

[quote name='Rudra' date='01 September 2010 - 07:13 PM' timestamp='1283348125' post='108132']



Agni-II+ to be tested in Sept. end from Orissa coast

[url="http://orissadiary.com/CurrentNews.asp?id=20926"]http://orissadiary.c...ws.asp?id=20926[/url]





From the above URL:



This newly built missile has a length of 21 meters and diameters of 1.3 meter, weighs around 17 tonnes. It is designed to carry ‘special weapons’ nuclear payload of over 1,000 kg.



does anyone can explain what is this special weapons nuclear payload means?

[/quote]



Euphemism for nuclear warhead.



Here is excerpt of my Agni-IIAT article (following is my copyright material) that I used to previously host at Bharat Rakshak.

(I continue to hold copyright for following excerpt from my Agni article)

[size="2"]Agni-IIAT[/size] [size="2"][color="#c0c0c0"].[/color][/size]

[size="2"]Length (m)[/size] [size="2"]20[/size]

[size="2"]Max Diameter (m)[/size] [size="2"]1.2[/size]

[size="2"]Launch Weight - kg (Including Payload)[/size] [size="2"]2 7,000[/size]

[size="2"]Propellant[/size] [size="2"]Solid (HTPB/AP/AI)[/size]

[size="2"]Number of Stages[/size] [size="2"]2.5[/size]

[size="2"]Payload - kg [/size] [size="2"]300 - 1,000[/size]

[size="2"]Range [color="#ff0000"](Payload)[/color][/size] [size="2"]4,000 km [color="#ff0000"](1,500 kg)[/color][/size]

[size="2"]CEP Accuracy[/size] [size="2"]20 meters [/size][size="1"](estimated)[/size]





[size="4"]INTRODUCTION: AGNI-IIAT[/size]



[size="2"]The Agni-II was a quick and proven design, albeit of 1980s vintage. The Agni-IIAT is the result of a CIP (Continuous Improvement Program) with Agni-II. Different reports indicate India developing a more advanced technology (AT) version of Agni-II[/size][size="1"][sup][82][/sup][/size][size="2"] putting into use, state-of-the-art technologies to significantly improve the Agni-II performance[/size][size="1"][sup][83][/sup] [/size][size="2"]as well as to adapt it to the newer and lighter nuclear payload, that was proven by the Pokharan-II series of nuclear tests[/size][size="1"][sup][84][/sup][/size][size="2"]. The new propulsion system could greatly increase the missile's range to 4000 km (1500 kg payload) and potentially to ICBM range for lighter payload. [/size]



[size="2"]The Agni-IIAT is likely to incorporate the following changes:[/size]

1. [size="2"] A larger diameter booster stage made of stronger 250-Marging steel, improving fuel loading and fuel mass-fraction (~0.88).[/size]
2. [size="2"] Lightweight carbon composite motor casing[/size][size="1"][sup][85, 86][/sup][/size][size="2"] for the second stage, instead of steel casing, improving its mass-fraction (~0.92).[/size]
3. [size="2"] Lighter, tougher and higher [/size][size="2"]β[/size] [size="2"](beta) RV, with all carbon composite re-entry heat-shield, multi directional carbon re-entry nose tip and control surfaces[/size][size="1"][sup][87][/sup][/size][size="2"]. Very likely a unary version of the Agni-III's RV Mk-4.[/size]

[size="2"]We refer to this postulated configuration as Agni-IIAT that would be validated when it is tested sometime in the future[/size][size="1"][sup][88][/sup][/size][size="2"]. However this paper gives an insight to potency of such technological improvement.[/size]



[size="2"] Comparative Line drawing of Agni-II and Agni-IIAT [/size][size="2"] [/size]



[size="1"][Image [/size][font="Verdana"][size="1"][color="#000000"]©[/color][/size][size="1"] Arun Vishwakarma] [/size][/font]



[size="2"]New improved 1.2m diameter rocket case of maraging steel being handed over to M. Natarajan[/size]



[size="1"][Source: The HINDU, 10-Nov-06] [/size]



[size="2"]Composite casing of Agni-II's second stage [/size]



[size="1"][Image [/size][size="1"]: Advanced Systems Laboratory, Hyderabad] [/size]



[size="2"]Description[/size]



[size="2"]After Agni-II development DRDO has reported major success in developing superior sub-systems ranging from newer higher performance RV, lighter casing of second stage and booster case made of stronger Maraging steel. The new missile's form factor is almost same as the Agni-II, but qualitative improvements in propulsion and warhead significantly improves its range and effectiveness.[/size]



[size="2"][color="#000000"]Accuracy of this longer range missile is augmented by space based precision navigation system. India and Russia are working together on the development and launch of a new generation of Global Navigation Satellite System (GLONESS) that will be operational by 2007[/color][/size][size="1"][sup][89][/sup][/size][size="2"][color="#000000"]. India is also building its own IRNSS ([/color][/size][size="2"]Indian Regional Navigation Satellite System[/size][size="1"])[/size][size="1"][color="#000000"][sup][90][/sup][/color][/size][size="2"][color="#000000"] covering 35% of earth surface, centered around India for assured access to space based precision navigation[/color][/size][size="2"].[/size]



[size="2"]Manoeuvring Re-Entry Vehicle: [/size]



[size="2"]New lighter and tougher RV, with all carbon composite re-entry heat shield with multi directional carbon re-entry nose tip and control surfaces, the new lightweight composites can withstand temperatures of up to 6,000º centigrade, thus capable of greater re-entry velocity[/size][size="1"][sup][91, 92][/sup][/size][size="2"]. The new RV smaller in diameter & length but higher [/size][size="2"]β[/size] [size="2"](beta) compared to the RV of Agni-I/II, similar to RV-MK4 of Agni-III & Agni-III++.[/size]



[size="2"]Propulsion[/size]



[size="2"]First Stage: A new 1.2 meter diameter[sup][92.A][/sup] booster case made of 250-Maraging steel with improved chamber pressure and fuel mass-fraction (estimated 0.88). Approximately 12 meter long and 20 tonne mass[/size]



[size="2"]Second Stage: Lightweight filament wound carbon composite motor casing[/size][sup][size="1"][93, 94][/size][/sup][size="2"] [sup] [/sup] for Stage-II with improved fuel mass-fraction (estimated between 0.90 - 0.92[/size][size="1"][sup][95][/sup][/size][size="2"]).[/size]



[size="2"]Agni-IIAT Configuration[/size]



[size="2"]Agni-IIAT Stage 1[/size]_____ [size="2"]Agni-IIAT Stage 2[/size] _____ [size="2"]PBV/HAM[/size] _____ [size="2"]RV[/size] [size="2"]

Gross Mass [/size] [size="2"] ____ [/size][size="2"]20,000 kg [/size][size="2"]____ [/size][size="2"]6,000 kg[/size] [size="2"]____ [/size][size="2"]220 kg [/size] [size="2"]____ [/size][size="2"]50 kg[/size]

[size="2"]Fuel Mass [/size][size="2"] ____ [/size][size="2"]17,600 kg[/size] [size="2"]____ [/size][size="2"]5,400 kg [/size][size="2"]____ [/size][size="2"]40 - 180 kg[/size]

[size="2"]Empty Mass[/size] [size="2"]____ [/size][size="2"]2,400 kg [/size][size="2"]____ [/size][size="2"]600 kg[/size][size="2"] ____ [/size][size="2"]20 - 50 kg[/size]

[size="2"]Fuel-Mass-Ratio[/size][size="1"][sup][96][/sup][/size][size="2"]____ [/size][size="2"]0.88[/size][size="2"] ____ [/size][size="2"]0.90[/size][size="2"] ____ [/size][size="2"]0.82[/size]



[size="2"]Thrust @ Vacuum [/size][size="2"]____ [/size][size="2"]78,600 Kgf[/size] [size="2"]____ [/size][size="2"]42,580 Kgf[/size]

[size="2"]Thrust @ Sea Level[/size][size="2"]____ [/size][size="2"]70,400 Kgf[/size] --

[size="2"][color="#ff0000"](Burn Time)[/color][/size][size="2"]____ [/size][size="2"][color="#ff0000"](58 seconds)[/color][/size] [size="2"]____ [/size][size="2"][color="#ff0000"](35 seconds)[/color][/size]



[size="2"]Length[/size] [size="2"]____ [/size][size="2"]12 meters[/size] [size="2"]____ [/size][size="2"]4.8 meters[/size] [size="2"]____ [/size][size="2"]2.6 meters[/size]



[size="2"]Diameter[/size] [size="2"]____ [/size][size="2"]1.2 meter[/size] [size="2"]____ [/size][size="2"]1.2 meter[/size] [size="2"]____ [/size][size="2"]1.0 meters[/size]

[size="2"][color="#ffffff"].[/color][/size]

[size="2"][color="#008080"]Case Material[/color][/size] [size="2"][color="#008080"]250-Maraging Steel[/color][/size] [size="2"]____ [/size][size="2"][color="#008080"]Filament wound composite material[/color][/size] [size="2"]____ [/size][size="2"][color="#008080"]All Carbon Composite[/color][/size]