Indian Missile News And Discussion

[Guest]

[quote name='Arun_S' date='07 March 2010 - 01:25 PM' timestamp='1267948044' post='104930']

ISRO's 7 second is for passive test and that is first step to engine realization, and penultimate for first hot test (with fuel) which is expected to be of longer duration to account for operating phase.



Also ISRO's approach with cryogenic fuel allows option to cool critical part using the cryo fuel (regenerative cooling). [/quote]



India and Japan were the leaders (theoretical and experimental work) in scamjet propulsion for many decades,





Arunji the above underlined matter is far from fact. In fact it was US,UK, n Australia. USA started work on scramjet during early sixties (Johns Hopkins Applied Physics Laboratory) and Australia in 1981.

In the 1950s and 1960s a variety of experimental scramjets engines were built and ground tested in US and the UK. In 1981 tests were made in Australia under the guidance of Professor Ray Stalker in the T3 ground test facility at ANU

While India did their first ground test in the year 2005 at VSCC.

THE INDIAN Space Research Organisation (ISRO) added another feather to its cap when it successfully tested the use of oxygen moving at a speed of Mach 6 — six times the speed of sound — in laboratory conditions to produce a stable supersonic combustion lasting for a few seconds.



Put in a nutshell, the organisation has tested the scramjet (supersonic combustion ramjet) technology that uses air moving at supersonic speed (Mach 6) for ignition. The speed of sound is 750 km per second and is called Mach 1. Anything beyond Mach 1 is considered supersonic. Ramjets, on the other hand, use air at subsonic speed (below Mach 1) for ignition.



Joining the elite club



With this, India has joined the elite club comprising a handful of nations that are working on mastering the technology. The U.S., Japan, China, Russia, Australia, and some countries in Europe, according to an ISRO press release, are working on scramjet technology.

India n Japan were never leaders in scram tech baba.