Throwback to the first HSTDV test, from the scientists speech back in 2020.
Institute Lecture on “The recent flight demonstration of hypersonic air-breathing cruise vehicle by India”
Title : “The recent flight demonstration of hypersonic air-breathing cruise vehicle by India”
Date : October 19, 2020 | Time : 3.00 pm
Abstract: Starting with the intense determination of the two brothers Orvile and Wilbur Wright at Kitty Hawk, North Carolina, and their success, the aspiration of flying at higher and higher speed in the atmosphere has led the mankind to a position where it is possible to conceive of aircrafts flying at speeds more than few times that of sound in air. When the flight is in hypersonic regime (M∞ >5.0), the burning of fuel must occur at supersonic speeds inside the combustor to allow the possibility of heat addition and minimise the total pressure loss and so, thrust loss. In turn, this allows propulsive efficiency of the hypersonic systems to be brought up to meaningful values and also contribute to reduced vehicle size and weight. The success of efficient design of such a transatmospheric hypersonic vehicles depends largely on the proper choice of the propulsion system which is capable of producing large thrust, demanded by the system. This type of vehicle uses supersonic combustion ramjet (scramjet) propulsion system.
The development of hypersonic air-breathing cruise vehicle has tremendous applications in high-speed transport, space access, national defence, etc. It is attractive for military operations and can provide significant payoff for offensive strike against time critical, hardened, deeply buried and heavily defended targets due to its longer range, shorter response time and enhanced effectiveness. Its reduced tracking by ground based radars compresses enemy's decision-making window, effectively enabling the hypersonic attacker to get inside an adversary's command, control, and battle management cycle.
Although, various countries including USA, Russia, China, UK, France and India are in the race to develop hypersonic airbreathing cruise vehicles; only a few practical flight tests of these vehicles have been conducted worldwide. Extensive R&D efforts are continuing for the design and testing of scramjet combustors for hypersonic vehicles. The flight trial of hypersonic air-breathing cruise vehicle (X-51) by USA for 210 sec duration is close to hypersonic weaponization program. Russia and China are also claiming the successful demonstration of hypersonic air breathing cruise missile; but no information is available in the open literature.
Recently, on September 7, DRDO, India has successfully test flown a vehicle integrated hydrocarbon fueled scramjet engine (cruise vehicle) in an autonomous mode. The cruise vehicle is put atop a solid rocket booster (launch vehicle) and carried to 32 Km altitude at Mach 6 conditions. The heat shield fairings which protected the cruise vehicle from aerodynamic heating during ascent phase were separated and the hydrocarbon fueled scramjet engine was ignited. The vehicle flown in power-on condition for 24 seconds before plunging into the sea. This maiden flight demonstration has proved many complex technologies and design tools for the development of hypersonic air breathing vehicles and put India in the league of the few advanced nations which possesses this complex technology.
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