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N&S America : SR-72 REVEALED ??
 
BY : http://sitelife.aviationweek.com/ver1.0/Content/images/store/7/2/d7a20495-377f-4998-a2ae-a6d2dbff3345.Large.jpg

SR-72 REVEALED ??



An unobtrusive model at DARPATech in Anaheim looks like the Hypersonic Cruise Vehicle (HCV) that is the far (very far) term goal of DARPA's Falcon program, but actually it's not.Rather, it depicts HTV-3X, a new addition to a family of hypersonic test vehicles that has tended to lose and gain members since Falcon got started. HTV-3X, though, is by far the most ambitious member of the HTV clan, and although opinions clearly are varied as to the feasible timescale for the project, it could get a real hypersonic aircraft flying long before the B-52-sized HCV.

It's also the demonstrator that has been described as the lead-in to a new reconnaissance/strike aircraft nicknamed SR-72. For the moment, though, it's a proposal struggling for attention and money.Key features - apparent from images snagged from DARPA video, and from other sources - include the fact that HTV-3X is an unmanned, fighter-sized aircraft. It's powered up to Mach 4 by high-speed turbojet engines, larger versions of the technology used in the RATTLRS high-supersonic cruise missile program. After that, ramjets take over, switching to scramjet mode above Mach 6.

The ramjets are of the inward-turning, circular type designed by ramjet/scramjet pioneer Fred Billig. Unlike the classic flying-doorstop shape of earlier scramjet designs, HTV-3X has an efficient waverider shape, and does not have to go 400 mph to get off the runway.


SR-72 REVEALED ??


HTV-3X is powered by hydrocarbon fuel - basically similar to jet fuel - and takes off and lands on a runway. In part, the demonstrator proposal is a response to the checkered history and operational impracticality of rocket-boosted one-shot demonstrators. But it's also aimed at demonstrating to customers that practical hypersonics may not be as far off as they think.
 
 
 
   
 
 
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  • Boeing's HyFly hypersonic missile fails in bid for Mach 6
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    Comments (1)  Print
     
     
    #1 Author: avatar_singh (2 October 2007 18:11)
     
    http://english.ohmynews.com/articleview/article_view.asp?code=2495784&menu=c10400&no=363684&rel_no=1&page=1&isSerial=&sort_name=&ip_sort=86.145.200.36


    http://english.ohmynews.com/articleview/article_view.asp?code=2495784&menu=c10400&no=363684&rel_no=1&page=1&isSerial=&sort_name=&ip_sort=86.145.200.36

    http://english.ohmynews.com/


    China-India Influence: So Near, Yet So Far
    BRIC is overhyped. Even India is overhyped. China is the main player
    Email Article Print Article Ranjit Goswami (ranjit)
    China isn't hype. It's a hard reality for the rest of the world powers to readjust their respective positions unwillingly in order to let this growing power take up more and more room in the limited global arena.

    And many powers, realizing the potential and reality of China shrank their respective space to accommodate China, only to rediscover within days that the space they vacated was occupied by this octopus-dragon within days, and that it asking for even more sooner than anyone expected.

    Enough has been written on rising China; however the actual impact of China can't be gauged with Western-style measures of economic power (read GDP). That only understates China's power, helping China to further strengthen itself without drawing adverse attention. In terms of GDP, it still is 1/4th that of the U.S. or the EU.

    Still many joined the hype when it came to focus on future growth drivers of the world economy, and influencing geopolitics through a combination of economic and military measures. And unfortunately, hype has followers everywhere.

    The biggest of that hype is proven by the coinage of the "BRIC" acronym, encompassing the obvious four of the largest eight populous countries.

    The four not included in that Goldman Sachs creation are the U.S. itself, Indonesia, Pakistan, and Bangladesh.

    One scale does not fit all. It's high time that the world rewrites that Brazil-Russia-India-China by beginning and ending with China alone, and still it would be an understatement for China. If one wants to add another important meaningful growth destination that can influence the world economically and militarily, it's Russia.

    On the other hand, India is all hype. As time moves, more and more of the hype is falling part, compared to China.

    It's either propaganda or stupidity that often compares India and China as running side by side in the same race of economic growth, accompanied with influencing world opinion (read Asia-Pacific/South Asia). Their similarities are few, whereas the differences stand like the Himalayas in between these two neighboring nations.
     
     
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