Aero 版 (精华区)
发信人: murjun (萧牧), 信区: Aero
标 题: NASA一研究小组成功研制一激光驱动飞机(EN)
发信站: 哈工大紫丁香 (2003年10月30日21:09:18 星期四), 站内信件
NASA Research Team Successfully Flies First Laser-Powered Aircraft
10.30.03
Artist concept of first-ever laser-powered aircraft, designed and built by a
team of NASA researchers
Ever since the dawn of powered flight, it's been necessary for all aircraft to
carry onboard power -- whether in the form of batteries, liquid fuel or even
a human "engine" -- in order to stay aloft.
Now, NASA researchers from the Marshall Space Flight Center in Huntsville, Ala
., the Dryden Flight Research Center at Edwards, Calif., and the University of
Alabama in Huntsville have found a unique way around that requirement.
They've developed and demonstrated what looks like a small model airplane outf
itted with special solar cells that can capture energy from a ground-based las
er and convert it to the power needed to spin the propeller. The laser beam fo
llows the aircraft in flight, supplying the energy. When the laser is turned o
ff, the propeller stops spinning and the plane glides to a landing.
Though sailplanes, gliders and other craft can remain airborne for extended pe
riods of time without onboard power supplies, the laser propulsion test marks
the first time a powered aircraft has demonstrated sustained free flight witho
ut some type of onboard power source.
"The craft could keep flying as long as the energy source -- in this case the
laser beam -- is uninterrupted," said Robert Burdine, Marshall's laser project
manager for the test. "This is the first time that we know of that a plane ha
s been powered only by the energy of laser light. It really is a groundbreakin
g development for aviation."
Weighing just 11 ounces, the plane is made from balsa wood and carbon fiber tu
bing. Its super-lightweight frame measures 4-1/2 feet long, and has a five-foo
t wingspan. It is covered with Mylar film, a cellophane-like material. Designe
d and built at the Dryden Center, the aircraft is a one-of-a-kind, radio-contr
olled model airplane.
The plane's designer, builder and "pilot," Tony Frackowiak, is an aerospace te
chnician at Dryden who has been constructing one-of-a-kind airplanes since he
was six years old. This project took him about two years to put together.
"It really has been a dream come true for me," Frackowiak said. "It's just fun
to work on something like this that can lead to bigger and better uses in the
future."
--
我非常喜欢在有风有雨的季节计划自己;
有风有雨后的季节晒着阳光我昏昏睡去;
睡去的我依然在甜梦中将曾有过的温习;
温习昨天前天等等的种种激情与过去。
Jim Mural
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