Shitless Ang Moh, Xijinping's new hypersonic bombers @MACH7 bombs NY in 2Hrs!

[pusy2rights]

But of course already have the DF-41 much faster over MACH20 can hit NY within 21 mins.




http://www.independent.co.uk/travel...two-hours-supersonic-air-travel-a8223686.html

1. INDYGO

China announces plan for hypersonic jet able to reach New York from Beijing in two hours
The team's hypersonic jet design features two layers of wings / Science China Press


A research team claimed the plane would travel at 6,000km/h

• Helen Coffey
• 13 hours ago

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The Independent Travel
A team of Chinese researchers has claimed to have designed a hypersonic jet that could travel at 6,000km/h, five times faster than the speed of sound.

The team from the Chinese Academy of Sciences said the plane would be able to transport passengers and cargo from Beijing to New York in two hours – the journey currently takes an average of 13 and a half hours.

Cui Kai, who headed up the research, published a paper on the new design in this month’s Physics, Mechanics and Astronomy journal, in which he said: “It will take only a couple of hours to travel from Beijing to New York at hypersonic speed”.

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The team said they had tested a scaled-down model of the jet in a wind tunnel, and that it reached speeds of 8,600km/h with low drag and high lift. To compare, Concorde’s top speed was 2,179km/h.

The design, dubbed the I Plane, features two layers of wings to reduce turbulence and drag while creating more lift.

Talk of hypersonic travel has been ramping up of late. “It’s certainly within the realm of possibility,” Dr Kevin Bowcutt, senior technical fellow and chief scientist of hypersonics for Boeing Research and Technology, told NBC last month. “I think we have the technology now where we could actually do it.”

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Boeing has dipped its toe in the water with its X-51A WaveRider, and it is now reportedly working with Lockheed Martin to develop a jet-powered hypersonic aircraft – although both are keeping schtum about the design.

Supersonic commercial planes – those that travel faster than 1,236km/h, the speed of sound – are likely to be the precursor to hypersonic jets. Boom Supersonic, for example, plans to produce passenger aircraft that can travel at MACH 2.2, or 2,335km/h, that will enter service in 2023.

These jets could carry 50 passengers, flying from New York to London in three hours and 15 minutes. But it won’t come cheap; fares are expected to cost $2,500 one way.

• More about:
• hypersonic
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[pusy2rights]

China succeeded in testing Hypersonic MACH7 bomber.

http://mil.news.sina.com.cn/jssd/2018-02-24/doc-ifyrvspi1452023.shtml

中国测试7倍音速飞行器 造型怪异是否能成为轰炸机
中国测试7倍音速飞行器 造型怪异是否能成为轰炸机

0

　　据《南华早报》22日报道称，中国科学院的一个研究团队称对缩小版的高超音速飞机模型进行了风洞测试，测试结果良好，显示这型飞机飞行速度可达7倍音速，每小时可飞行8600公里，从北京飞抵纽约只需2小时。

　　高超音速是近几年航空航天领域的热词，从中国到美国，都有高超音速武器相关的新闻报道。不过高超音速目前在军事上的应用，主要是导弹、弹头和无人飞行器。这些箭型导弹、乘波体弹头或者无人飞行器，在冲压发动机、组合动力发动机或者火箭发动机等动力的推动下，达到10马赫以上的高速，某些高超音速弹头末端甚至可达20马赫。但这些弹头一般体积较小，而这次中国科学家研究的高超声速飞行器，则截然不同。

　　中国科学院以崔凯研究员为首的团队，研究的是一种用于运送乘客和货物的高超音速飞行器。和高超音速弹头不同，用于运输的高超音速飞行器除了高速之外，还需要具备高升阻比、高升力和高容积率。高升阻比以保证航程， 高升力使其在高海拔巡航飞行条件下保持升重平衡， 高容积率以满足载客/载货需求。但是高超音速飞行器升阻比很难提升，而且提高升阻比势必降低容积率。因此高超音速飞行器，很难实现大型化。

　　而崔凯研究员为首的团队则创造出一种独特的双升力面立体布局（见上图），其外观是在传统布局上方增加额外的升力面，有点像“飞机背飞机”，能够同时满足高升阻比、高升力系数和高容积率的“三高”需求。这种布局的核心思想是中国科技人员原创的“高压捕获翼”设计原理，在大容积率（约0.175）条件下可获得超过4.5的升阻比， 升力系数较乘波体等布局提高达60%左右。

　　据《南华早报》报道，一位不愿意透露姓名的专家称，新的高超音速飞行器很可能会进行缩比模型空中测试。尽管对于这一新布局，还存在热防护、静/动稳定性和控制等方面的问题需要深入探索，但这种新型飞行器在军民领域拥有极为广泛的领域。在民用领域，高超音速带来运输时间的缩短，其意义是不言自明的。而在军事领域，大容积高超音速飞行器显然更受青睐。

　　从轰炸机诞生以来，最求高速轰炸就成为军事大国的追求。在上世纪60年代，美国诞生了世界上第一种3倍音速有人乘波体轰炸机，但由于技术原因下马。尽管现在最先进的是亚音速B-2隐身轰炸机，但美俄等国追求高超音速轰炸机的努力一直没有停止。而中国设想的双升力面立体布局，使得高超音速轰炸机又多了一种新颖的布局方式。尽管这种布局在隐身上可能会有缺陷，但其高速就是最有效的防护。而且即便该技术不能应用于远程打击，也能实现军力的远程快速投放。（作者署名：诤闻军事）



https://www.popsci.com/chinas-hypersonic-technology

A look at China's most exciting hypersonic aerospace programs
The latest scramjets, near-space planes, and super wind tunnels.
By Jeffrey Lin and P.W. Singer April 19, 2017

The Future of the PLAAF, 2030?

This "what if" piece of CGI fan art from the Chinese Internet shows what a hypersonic military aircraft would look like; with a streamlined fuselage, a large ventral air intake and relatively small wings. Flying in near space (12 miles to 60 miles in altitude) at speeds of up to Mach 10, such aircraft could cover the distance between New York and San Francisco in under 30 minutes—plus dodge existing air defenses.

Armystar.com

Hypersonic technology has the potential to revolutionize both military and civilian aerospace, so it's no surprise that China is showing off its program.

At the 21st International Space Plane and Hypersonic Systems and Technology in Xiamen—a global forum of scientists and engineers researching hypersonic concepts and technologies—Chinese scientists provided key details on several little-known but game-changing scramjets, near-space planes, and super wind tunnels.

China's Scramjet

This December 2015 scramjet test flight is the first public-source picture of China's scramjet program, which set a high speed of Mach 7.

National Natural Science Foundation of China

First, let's talk about scramjets. These have air-breathing engines (like turbofans and piston engines), so they don't need to carry a supply of oxidizer to combust their fuel. This makes them lighter and more efficient than rocket propelled missiles, as well as being more maneuverable. The first open source image of a Chinese scramjet test emerged in December 2015. It flew to an altitude of 30 kilometers (over 18 miles), and reached a Mach 7 speed. Interestingly, while American scramjet tests have generally been air dropped before firing their rocket boosters, the Chinese scramjet test was boosted from a land-based launcher. Scramjets could enable more efficient and easier forms of space launch and hypersonic airliners, just as they could be used for high-speed cruise missiles to replace ballistic missiles.

TRRE

The turbo-aided rocket-augmented ram/scramjet engine (TRRE), which uses rocket augmentation in order to aid in the transition into the supersonic and hypersonic flight regimes, could be the world's first combined cycle engine to fly in 2025, paving the way for hypersonic near space planes and single-stage space launchers.

Beijing Power Machinery Research Institute

A hypersonic plane can fly in the "near-space" altitude of 12 miles to 60 miles, allowing it to shoot into orbit with integrated rockets, or fly civilian and military missions in near space. Such a hypersonic plane could circumnavigate the world in a couple hours, out of the reach of conventional air defenses. China has several programs researching hypersonic combined cycle engines, which consist of a turbofan stage for subsonic/low supersonic flight, and a ramjet stage for the transition from supersonic to hypersonic flight.

The most promising program is Beijing Power Machinery Research Institute's turbo-aided rocket-augmented ram/scramjet combined cycle (a mouthful often abbreviated to TRRE), which uses integrated liquid-fueled rockets to boost the performance of the turbine and ramjet stages, thus making a safer and smoother transition from supersonic to hypersonic flight of Mach 10. With key components like the engine inlet, cooling, and combustion already developed, ground tests of the system are beginning later this year. The reported plan is for a full-scale TRRE testbed to begin flights by 2025, with a 2030 test flight.

FD-21

The FD-21, a 556-foot-long wind tunnel, was finished in 2016 by the China Academy of Aerospace Aerodynamics, who will turn it on later this year. Reaching speeds of Mach 10-15, it's also large enough to test full-sized components of hypersonic propulsion, like gliders and scramjets.

China Academy of Aerospace Aerodynamics

And then there are the hypersonic wind tunnels. China has the world's largest hypersonic wind tunnel, the detonation drive JF-12, and is working to build an even larger one. The 556-foot-long FD-21 hypersonic shock tunnel can reach speeds of Mach 10-15, well above the JF-12's Mach 5-9 range. Clearly, China is not content to restrict its flight research to the lower end of the hypersonic speed range.

The Future?

Chinese scramjets, as part of combined cycle engines, could allow China to fly Mach 6 airplanes, as portrayed in this speculative CGI, anywhere in the world in under three hours, at speeds and altitudes impervious to modern air defenses. It is highly likely that due to the nature of material sciences and laws of physics, hypersonic aircraft like the American SR-72 and its Chinese counterparts would look similar to each other (like how most modern attack submarines share the same general hull shape).

Grassroots (artist)

At the Xiamen event, Chinese engineers also reported on a wide range of other hypersonic technologies, such as plasma jets to steer hypersonic thrust, advanced heat resistant composites, and new fuels. The event was yet another indication that, with well established programs in spaceplanes and scramjets, China is set for a hypersonic flight boom.



https://www.nextbigfuture.com/2017/04/china-reveals-hypersonic-scramjet-developments-and-plans.html

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China reveals hypersonic scramjet developments and plans

China reveals hypersonic scramjet developments and plans
brian wang | April 14, 2017

China has revealed the first known images of an indigenous scramjet test that it says was successfully conducted at speeds up to Mach 7 and altitudes up to 30 km, in December 2015.

Credit: National Natural Science Foundation of China.

Studies of a folding-wing hypersonic boost-glide vehicle designed for deployment from a launcher at Mach 5 and 30-km altitude show dramatic changes in the center of pressure on release. Credit: China Academy of Launch Vehicle Technology



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Tests of a magneto-hydrodynamic heat shield system showed performance could be boosted by seeding the flow with potassium particles. Credit: College of Aerospace Science and Engineering

Ground tests of a hydrogen-fueled continuous-rotating detonation ramjet at Mach 4.5 and simulated 18.5-km altitude indicated positive thrust was obtained. Credit: National University of Defense Technology

China will test a prototype combined-cycle hypersonic engine later this year that they hope will pave the way for the first demonstration flight of a full-scale propulsion system by 2025. If successful, the engine could be the first of its type in the world to power a hypersonic vehicle or the first stage of a two-stage-to-orbit spaceplane. Combined-cycle systems have long been studied as a potential means to access to space and long-range hypersonic vehicles.

Chinese Academy of Sciences professor Lihong Chen said: “We also developed a low cost near-space science and technology flight test platform. The first flight test was successfully carried out, and key issues of the scramjet were demonstrated at Mach 3.5-7 and at altitudes of 15-30 km [9-18 mi.].” Offering no further details, Chen says the flight test was targeted at fundamental research under a program that she likened to the Australian-U.S. Hypersonic International Flight Research Experimentation (HIFiRE) effort.

Zhang Yong, a CASTC engineer, claimed that China will master the spaceplane’s technologies in the next three to five years, and a full-scale spaceplane would then enter service by 2030.

Lihong Chen had written a Feb 2016, paper in Acta Mechanica Sinica – Engine performance analysis and optimization of a dual-mode scramjet with varied inlet conditions.

A dual-mode scramjet can operate in a wide range of flight conditions. Higher thrust can be generated by adopting suitable combustion modes. Based on the net thrust, an analysis and preliminary optimal design of a kerosene-fueled parameterized dual-mode scramjet at a crucial flight Mach number of 6 were investigated by using a modified quasi-one-dimensional method and simulated annealing strategy. Engine structure and heat release distributions, affecting the engine thrust, were chosen as analytical parameters for varied inlet conditions (isolator entrance Mach number: 1.5–3.5). Results show that different optimal heat release distributions and structural conditions can be obtained at five different inlet conditions. The highest net thrust of the parameterized dual-mode engine can be achieved by a subsonic combustion mode at an isolator entrance Mach number of 2.5. Additionally, the effects of heat release and scramjet structure on net thrust have been discussed. The present results and the developed analytical method can provide guidance for the design and optimization of high-performance dual-mode scramjets.

RBP

 

[Froggy]

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