Haridas wrote:Sorry sir I will have to take you to the mat.
With due respect sir, I don't mind being taken to the mat with proper logic and reasoning. But what you say makes no sense to me at the moment.
Really ? Wrong !
Isn't the typo obvious there. I meant Agni III.
Agni VI has the same three stages as Agni V, except its first stage has a composite case. The throw weight increases from 1 ton to 3 ton.
wow the composite stage casing must be generating thust (using unobtainium), or is a wishful thinking with no scientific fesibility/foundation.
If you make the upper stage lighter, it has a remarkable effect on the size of the booster required. Case in point: By making the second stage lighter, Agni 2P has twice the range of Agni 2 using similar sized boosters even for the same payload. The missiles' overall weights are 16 and 17 tons respectively.
While I am not completely right in making the bolded statements above (more on that later), the following are slides from Dr. Saraswat.The payload increases from 1 ton to 3 ton with only a marginal increase in weight. Notice that he highlights that all three stages are made out of composites. Agni VI will actually have a new first stage which weighs 40 tons. The diameter will be slightly larger (presumably 2.3 mtrs) than that of the A5. While revealing this in 2013, Dr. Chander also said it is a technological challenge that the country has to overcome, i.e. to build a composite booster.
Haridas wrote: She is a scientist & engineer and would speak in measured way within a context, but surely who listened and reported it must be a dumb dork media reporter, for it is impossible to transform 48 tonne solid fuel missile throw capabelity (even assuming maraging case) into a 22 tonne solid fuelled craft no matter the level of optimization. I would be happy to be proven wrong (and eat vegitarian crow equivalent) if someone can kindly show scintifically / mathamatically it's viability using earthly material, much less material and techniques that isro or drdo has demonstrated.
It was not one reporter who reported, but a few.
She said they completely redesigned Agni III, just like they are doing for Agni 1 now. In the new Agni 3, the upper stage has a composite casing. It has new lighter avionics and has single digit accuracy. Hence, they decreased the payload from 2.5 tons to 1.5 tons. Even Avinash Chander spoke of the reduction of the payload. Now, if they dropped 2 tons or so from the second stage and made it much more efficient, how big does the booster need to be. Another way to ask the question is if it takes 16 tonnes for Agni IV to lob 1 ton to 4000 kms, how many tons does it need to lob 1.5 tons to similar distance. Suddenly, the 22 tons seems plausible, doesn't it?
On the other hand, you are asking me to believe that the guys always had the technology to build the motor casing of the booster using composites, but not the upper stages. So, in Agni III, they used composites for the lower stage and maraging steel for the upper stages.
And then they went to Agni V wherein they discarded the composite casing from Agni III and started using a steel casing again.
How does this stand your sanity test?