Absolutely fascinating Nidhin! I had never even the slightest thought of rocket propelled sword blades, despite the many innovative combination weapons that Indian armourers produced. I think it is most intriguing to see the many influences that seem to have come to India's weapons from China, and it would appear as noted in the film, that these terrifying rocket sword blades had impressive effect on the British as well.
Thank you so much for posting this
All the best,
Jim