Read the last tweet. --"A ramjet powered ARM that is considerably lighter than NGARM"
If I am not wrong NGARM uses a solid fueled dual pulse detonation engine which is a very advanced lightweight propulsion system(which is why it was chosen to be used for an Airborne missile). Now making a ramjet ARM that is considerably lighter would also mean its a solid fueled Ramjet(since liquid fueled rockets are generally heavier and we are sure as hell not making a cryogenic engine). Isn't the SFDR supposed to be the Indo-Russian solid fuel ramjet project ? Is this a different project ? or is it supposed to use the SFDR engine ? The current NGARM is supposed to have a range of 100-125 km. It would also be safe to assume the ramjet ARM will have a much longer range. Since ramjets tend to be more expensive,more complex and more time consuming to build than solid rocket engines, it only makes sense to build them if they give you a performance boost that cannot be replicated by the dual pulse propulsion. So we are talking 125+ km of range at least. Being able to detect/engage targets from this far away would require a serious sensor package(both passive and active). Interesting times ahead.
Also, remember Rudra-2, Rudra-3 what are they exactly ?
You took it the wrong way . What Vijainder sir meant was that ,
Ramjet powered ARM = father of (rocket motor powered and considerably lighter NGARM!)
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