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Space Science

ISRO Successfully Test-fires Scramjet Rocket Engine (thehindu.com) 54

An anonymous reader writes: Indian Space Research Organisation (Isro), on Sunday, successfully tested two indigenous scramjet engines. India has become the fourth country to demonstrate the flight testing of scramjet engine after the US, Russia and European Space Agency.
According to a report, the scramjet will bring down the launch cost of weather satellite INSAT-3DR which is a weather forecast system designed for enhanced meteorological observations and disaster warning. The satellite scheduled to be launched in August earlier, but it has been postponed to September.

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ISRO Successfully Test-fires Scramjet Rocket Engine

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  • More than half ? (Score:4, Informative)

    by religionofpeas ( 4511805 ) on Monday August 29, 2016 @12:21PM (#52789933)

    Scientists say that the scramjet technology effectively cuts down the cost of launching rockets by reducing its weight by more than half

    Not really. Scramjets have a limited speed range, so you need a rocket (or perhaps another type of jet engine) to bring it up to the lower limit, and then another rocket to take it from maximum speed to orbital speed. This add extra complexity, weight and drag.

  • I know what was meant, but it seems a funny word to use on a non-living thing. But it's cool to learn that the European Space Agency is now considered a country. Way to go, European Space Agency!
    • by hey! ( 33014 )

      Indigenous means "originating where it is found", or "naturally occurring in a particular place". It can be used referring to individuals, groups of people, flora, fauna, minerals -- pretty much anything. It shares many of the same dictionary definitions as "native".

      The word usage problem is using "indigenous" for an artificial, mobile invention, which is a bit unusual. You wouldn't say "indigenous airplane" because it's not something naturally found in a place or confined to a place. That would be an un

      • I've noticed that in US-speak, rocket engines are often "domestic" if manufactured in the US (when the RD-180's replacement is the topic, for example) but often "indigenous"" if manufactured in developing countries. Kind of reminds me of "expats" vs. "immigrants".
      • by gfxguy ( 98788 )
        That's true - it's why I didn't say it was wrong, just funny (or, awkward, really) to me.
  • by brambus ( 3457531 ) on Monday August 29, 2016 @01:27PM (#52790389)
    Scramjets are, by definition, air-breathing, and are therefore not rocket engines. Admittedly a nit of terminology, but the /. crowd are generally more technically/engineering minded people and those tend to care about proper use of jargon.
    • I'm pretty sure the headline left out a slash, and it should read "scramjet/rocket engine". Scramjets (as I'm sure you're aware) need a way to get to supersonic speeds before they start working.

  • The real intent of course, is a better weapons platform to defend against Pakistan. Sadly, it is just a matter of time before some fundie moles get their trigger fingers on Islamabad's nukes and return the entire world to the 12th Century.
  • by K. S. Kyosuke ( 729550 ) on Monday August 29, 2016 @01:31PM (#52790425)

    According to a report, the scramjet will bring down the launch cost of weather satellite INSAT-3DR which is a weather forecast system designed for enhanced meteorological observations and disaster warning. The satellite scheduled to be launched in August earlier, but it has been postponed to September.

    No fucking way. INSAT-3DR will be launched on a GSLV Mk II vehicle which doesn't have any scramjets. Even more obvious should be the fact that a successful engine test now can't possibly bring down launch costs a few months later. That timeline is like an order of magnitude more optimistic than what commonly happens in aerospace.

    • by ceoyoyo ( 59147 )

      The stupid in the summary burns. The stupid in the article is a glaring bright bonfire. Especially the part where they say "cutting through the technical jargon, here's all you need to know...."

    • I'm guessing there was a bit of a translation mix up there. They probably made an example of the upcoming launch as the type of payload that they could save costs on in the future.
    • by robinsc ( 84714 )

      The two statements aren't related. The delay in launch was due to a technical problem , not due to change of launch technology.

      The other statement was that the use of scramjets would bring down the cost of satellite launches such as the INSAT by 50%.
       

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