There's a theory I thought of which could be very much a possibility ALTHOUGH I DON'T WANT TO RANT ABOUT IT AT PUBLIC SM.
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1. Akash-NG is approx 1m shorter than Akash Mk.1/ Mk.1S (4.8m vs. 5.8m)
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2. Akash-NG is powered by solid fuel Dual Pulse Rocket Motor.
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3. Barak 8 too have solid fuel Dual Pulse Rocket Motor.
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4. Akash-NG is approx 30cm longer than Barak 8 (4.8m vs. 4.5m)
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5. Barak 8 have 90km range.
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[Considering all of the points above, do Akash-NG still have just 50km range? Not buying it.]
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6. Now again, diameter of Barak 8 is 0.225m while the internal height of Akash-NG cannister is 0.38m (NOT SAYING Akash-NG diameter would be 0.38m, but Akash-NG diameter could be a larger than Barak 8's 0.225 diameter).
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[Point 6 suggests that Akash-NG range could well exceed Barak 8's 90km range]
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{Everything would be clear once the official schematics of Akash-NG comes out as its diameter is still a MYSTERY}
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7. Barak 8ER is officially Israel's IAI only project, and no Indian Company (DRDO) is involved.
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[Point 7 could mean the Akash-NG could actually be our desi Barak 8ER with a longer and larger body than Barak 8 (non-ER), but without the ~0.5m x 1.5m (diameter x height) attached booster of the original Barak 8ER]
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ONCE AGAIN! Its all a theory made by me as the 50km official range of Akash-NG seems difficult to digest.
never believe the news as it is. Take it with a pinch of salt. Akash, is a hybrid solid fuel first stage and liquid fuel ramjet second stage right? Just like Brahmos. Assume that Brahmos and Akash have similar engines, though I believe the engines are one in the same. Both do 2.5 mach etc...
so we do the math.
Brahmos with range of 250KM though we know its like 400 or 700 KM. And a weight of 3 tons
250km/3000 tons is = 0.083 x 720kg Akash weight = 60 KM for Akash range give or take. Thats a pretty good number no where near 25 km on brochure?
do the same math with Akash figs
25 km / 720 kg = 0.035 x 3000 tons of Brahmos and you get 100 km. Not at all the range of Brahmos is it?
Akash is understated range. Real range is 60km+. Meaning its a very long range SAM. Its got room for growth in tracking etc... but limited BMD capabilities as its an air breathing engine. I'd expect newer versions of Akash to have seekers, longer range AESA radars and network centric capabilities to make use of such long ranges. Which would be why Navy is interested in the missile although Navy would also BMD missiles as well.