Shaheed Memorial Lecture in Bangalore (30 November 1991), called Tipu Sultan the innovator of the world's first war rocket. Two of these rockets, captured by the British at Srirangapatna, were displayed in the Royal Artillery Museum in London. According to historian Dr Dulari Qureshi Tipu Sultan was a fierce warrior king and was so quick in his movement that it seemed to the enemy that he was fighting on many fronts at the same time. Tipu managed to subdue all the petty kingdoms in the south. He was also one of the few Indian rulers to have defeated British armies. Tipu Sultan's father had expanded on Mysore's use of rocketry, making critical innovations in the rockets themselves and the military logistics of their use. He deployed as many as 1,200 specialised troops in his army to operate rocket launchers. These men were skilled in operating the weapons and were trained to launch their rockets at an angle calculated from the diameter of the cylinder and the distance to the target. The rockets had twin side sharpened blades mounted on them, and when fired en masse, spun and wreaked significant damage against a large army. Tipu greatly expanded the use of rockets after Hyder's death, deploying as many as 5,000 rocketeers at a time. The rockets deployed by Tipu during the Battle of Pollilur were much more advanced than those the British East India Company had previously seen, chiefly because of the use of iron tubes for holding the propellant; this enabled higher thrust and longer range for the missiles (up to 2 km range). British accounts describe the use of the rockets during the third and fourth wars. During the climactic battle at Srirangapatna in 1799, British shells struck a magazine containing rockets, causing it to explode and send a towering cloud of black smoke with cascades of exploding white light rising up from the battlements. After Tipu's defeat in the fourth war the British captured a number of the Mysorean rockets. These became influential in British rocket development, inspiring the Congreve rocket, which was soon put into use in the Napoleonic Wars. Navy In 1786 Tipu Sultan, again following the lead of his father, decided to build a navy consisting of 20 battleships of 72 cannons and 20 frigates of 65 cannons. In the year 1790 he appointed Kamaluddin as his Mir Bahar and established massive dockyards at Jamalabad