The Next Generation of U.S. Passenger Planes: Stealth Bombers or Space Shuttles?

Published in Renming Wang
(China) on 5 November 2009
by Gao Yijun (link to originallink to original)
Translated from by Lauren Christopher. Edited by Joanne Hanrahan.
In order to increase airline travel efficiency while at the same time making travel a more peaceful process, a number of American companies are uniting to test a type of “stealth bomber” model as the next generation of passenger planes. Allegedly, by 2020 this new model is predicted to consume up to 40 percent less fuel that the Boeing 777. By 2030, the new models will consume 70 percent less fuel.

Last winter, the U.S. allocated $12.3 million to Boeing, Lockheed Martin and other companies for research and development of the new generation of passenger planes, referred to by its code name “N+3.” The wings of this type of passenger plane resemble gigantic triangles. These wings are not narrow like traditional passenger plane wings; instead, they are based upon the same proportions of a high-speed wind tunnel test model. The triangular wings allow the body of the plane to fly with significantly lower air resistance, thereby increasing the plane's fuel efficiency.

As soon as this new model changes the traditional passenger plane’s design, developers will install the engine into the upper part of the fuselage, increasing the fuel efficiency and significantly decreasing the noise produced. At present, the biggest challenge faced in research and development is how to design the engine with more efficient fluid intake.

Due to this new plane's large body, its internal design is similar to that of an amphitheater. One drawback, however, is that the design leaves fewer window seats available. To make up for the lack of window seats, regular seats are designed to be more comfortable and with “luxury spacing.” By 2023, the U.S. airline industry will retire 4000 planes from use. Eighty-five percent of the materials from the planes will be recycled, including tires, batteries, carbon fiber and various types of hydraulic fluids.

In order to deal with the possibility of another oil crisis, Montana’s Sustainable Oil Company has begun harvesting a special type of camelina sativa (rapeseed), to extract aircraft fuel from rapeseed oil. This type of crop can be symbiotically combined with the standard wheat crop; as such, it will not cause any agricultural disruption. The United States’ airline industry’s experiment with “algae fuel” has also been successful. Currently, the biggest obstacle in extracting material for oil from algae is its cost: $25 per liter, or almost $95 per gallon.

Researchers discovered that algae is rich in oil and grows rapidly, making it entirely possible to serve as a substitute for oil or coal. The oil company giant Mobil states that it will allocate $600 million on algae energy extraction technology. Because of algae’s ability to grow fast and in dirty water and to absorb carbon dioxide, key environmentalist figures look upon its use favorably. However, it costs $5 to produce only $1 worth of fuel, energy from algae will never be anything but “Little Red Flower” technology: deeply desirable, but forever out of reach.

Lockheed Martin is expected to produce a commercial aircraft capable of crossing the Atlantic Ocean in 4 hours by 2015. This improved aircraft will adopt a "double decker" (two component) design, similar to that used by the Space Shuttle. Due to the energy provided by its liquid hydrogen and oxygen propellant, the detachable engine can be used up to 25 times. This plane will launch into low earth orbit and the rocket engine will separate, descending at its designated location for recovery. Refueling preparations will take 1-3 days.

According to reports, the rocket can reach a top speed of 20,000 km per hour (over 12,400 mph) much like the Space Shuttle. Once it has entered space, this aircraft glides through the atmosphere toward its destination, utilizing much less fuel than after its initial launch. The biggest issues that face investment in passenger aviation are issues of safety and key stakeholders' tough requirements regarding profit margins.

If this new model passenger plane can be considered "forward thinking," the investments in high-speed trains, the new model of double deck public transportation, and small private jets will all become the newest "thing" among Western nations, popularizing the concept of green living. Compared with Europe, the U.S. has underused high speed rail systems. Now California is taking the lead, announcing that it is on the verge of constructing a high-speed rail system running from San Francisco to Los Angeles.


美国下一代客机酷似“隐形轰炸机”或“航天飞机”?

人民网11月5日电 为提升航空运输效率,同时让旅行过程变得更安静,多家美国公司正在联合测试一种“貌似”隐形轰炸机造型的新一代民航客机。据称,这种预计在2020年首飞的客机能比现役波音-777客机少消耗40%的燃油。2030年,新客机的燃油消耗将减少70%以上。

  去年冬天,美国为波音公司、洛克希德马丁公司和其它公司拨款1230万美元研发上述代号为“N+3”的新客机。这种客机先进的混合机翼体外观看上去像个巨大的三角,而不是传统的“苗条身材”,并且已开始进行同比例模型高速风洞测试。三角混合翼让机体表面阻力大幅减少,从而提升燃油效率。

  这种新飞机一改传统客机的设计方式,将发动机置入机身上部。此举也相应提高可燃油效率并大幅度降低噪声。目前,新客机在研发过程中面临的最大的挑战就是如何让设计出更为高效流畅的发动机进气系统。

  由于这种新客机的机身极其宽大,因此其内部设计类似“圆形剧场”,但靠窗座位不多。为了弥补上述缺陷,普通座椅将采用乘坐舒适的“豪华宽敞”型号。在2023年,美国航空业将有4000架飞机退役。这些飞机上85%的材料将被回收再利用,其中包括轮胎、电池、碳化纤维和液压机使用的各类液体等。

  为应对可能再度发生的石油危机,美国蒙大拿州“可持续石油公司”开始种植特殊品种的荠蓝(油菜),并利用它提炼飞机燃油。这种作物能和普通小麦“共生”,因此不会破坏先有的农产品结构。美国大陆航空公司的“水藻燃油”飞行试验也取得成功,目前的最大障碍是从水藻提取油料成本太高(25美元/升)。

  研究人员发现,藻类富含脂肪,而且生长迅速,完全可能充当石油或煤炭的替代品。石油巨头美孚公司表示,将斥资6亿美元开发藻类能源提炼技术。由于藻类生长时能吸收大量二氧化碳,且能在肮脏水体中生长,因此颇受环保人士青睐。可是如果人们必须花5美元电费才能造出价值1美元的燃料,从藻类中提出油料只能是“看上去很美”的技术。

  洛克希德马丁公司预计在2015年研发出能在四小时内飞越大西洋的商用飞机。这种根据航天飞机改良的“火箭飞机”采取双层设计,由液态氢和氧推进器提供能量,可重复使用25次。飞机首先由火箭从发射架送入外层空间,然后火箭发动机脱离并降落到指定地点回收。重新填充燃料的准备工资要花费1到3天。

  据悉,上述“火箭飞机”最高时速能超过2万公里(与航天飞机差不多)。进入外层空间后,这种飞机开始滑翔进入至大气层前往目的地。这样,它就能使用更少燃料前进。不过,这种飞机投入民航客运面临的最大难题是安全性和对成员身体条件的苛刻要求。并非所有的人都能适合这种“准太空之旅”。

  如果上面提到的新型民航客机只能算是“远期规划”,那么已经投产的高速列车、新型的双层公交车和私人小飞机,都将成为近期西方人出行的新宠,以便推广其“环保生活理念”。同欧洲相比,美国曾对高速铁路较为“轻视”,现在加利福尼亚州就率先宣布,即将兴建纵观南北的高速铁路系统。(高轶军)
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