The heaviest aircraft in the world (photo): 275-ton,-6 engine aircraft, large aircraft-IT information

On May 11, 1964, to 3200 km/h speed flight B-70 in Northern California pamodaer United States official appearances of the aircraft factory, and the research before the plane was not known.

At a cost of us $ 1.34 billion project and in the air force, can only reproduce one such aircraft as planned. The design capacity for flights over 20000 m 6000 miles, it created a new standard for aircraft performance.

But critics say its technology is outdated. The plane's supporters retort B-70 pioneered the use of lightweight titanium precedent, including 6 tons of titanium used in the airframe predecessor.

Can trust, weighed 275 tons of B-70 was the heaviest aircraft ever built, from 6 powered Jet engines, air intake large enough to enable a person who stands 1.8 erect.

As the United States air force during the cold war era development of experimental Mach three times of high altitude strategic bomber, B-70 "Valkyria" bombers from the United States Air Force strategic command, designed and manufactured by the Licensing Division of North American aviation in Los Angeles.

Designed to replace the B-52 B-70 planned Stratofortress bomber, at supersonic speed, ultra-high-flying ways to break through a State's air defense network, further throwing the conventional or nuclear weapons.

Although with most advanced technology concept and amazing strength, but after 1960 's surface-to-air missile technology upgrade, potential threats to B-70 increase, coupled with the high cost of development similar to it than on the economic role of intercontinental ballistic missiles, eventually was canceled.

Has prototype machine was made to research use, actually only two prototypes declare end of scheduled outages.

The aim of development of B-70 as a weapon although stillborn, but its actual flight United States aviation community gained important information indirectly assist the realization of future supersonic airliners.

B-70 has 6 General Electric YJ93-GE-3 turbojet engine, with variable pitch blade, 14060 kilograms each with Afterburner thrust.

全球最重的飞机（图）：重275吨，6个发动机 - 飞机,大飞机 - IT资讯

1964年5月11日，以每小时3200公里速度飞行的B-70轰炸机在加利福尼亚州帕默达尔北方美国飞机厂正式露面，而该飞机起飞前的研究工作并不为人所知。

在耗资13.4亿美元的空军工程中，按计划只能再生产一架这类飞机。该机设计能力为在20000米上空飞行6000英里，它为飞机的性能创造了新的标准。

但是批评者们认为它的技术是过时了的。飞机的支持者反驳说B-70开创了使用轻金属钛的先例，其中有6吨钛用于飞机机体前身。

可以相信，机重275吨的B-70是迄今建造的飞机最重的，由6部喷气发动机作动力，进气口大到足以使一个身高1.8的人直立其中。

作为美国空军在冷战时代开发的实验性三倍音速超高空战略轰炸机，B-70“女武神”轰炸机由美国空军战略司令部授权北美航空洛杉矶分部所设计制造。

B-70原计划设计用来取代B-52同温层堡垒式轰炸机，以超音速、超高空飞行的方式突破敌对国家的防空网，进一步投掷传统或核武器。

虽然拥有当时最先进的技术概念与惊人的实力，但进入1960年代后地对空导弹的技术逐渐提升，对B-70的潜在威胁大增，再加上昂贵的开发费用使得它在经济效益上比不过作用类似的洲际弹道导弹，最后终于遭到取消。

已经制造出来的原型实验机也被改为研究用途，实际只生产了两架原型机即宣告计划中断结束。

B-70作为一种武器来发展的目的虽然胎死腹中，但透过它的实际飞行美国航空界获得许多重要的资料，间接协助了日后的超音速客机的实现。

B-70拥有6具通用电气公司YJ93-GE-3涡轮喷气发动机，具有变距涡轮叶片，每具加力推力高达14060公斤。