VOA慢速英语 Glider Plane to Soar Stratosphere for Data
时间：2018-12-08 作者：英语课 分类：2015年VOA慢速英语(九)月
AS IT IS 2015-09-30 Glider 1 Plane to Soar Stratosphere for Data
Gliders 2 are light aircraft that fly with no engine. They are pulled by a powered plane into the sky and set free to fly on air currents. They soar on wind currents called “mountain waves.” That is why their wings are longer than ordinary planes.
The aerospace 3 company Airbus Group recently completed the first flight of a glider it calls Perlan 2. The Perlan Project intends to use gliders to take measurements in the stratosphere. Scientists believe weather in the stratosphere affects the Earth’s climate more than they thought before.
Airbus plans to send Perlan 2 to an altitude of 27 kilometers next year. That is higher than the records set by the U-2 and SR-71 spy planes.
Jim Payne is the chief pilot of Perlan 2.
"We're not a thousand percent sure that the mountain wave will go that high, but all the meteorologists tell us that it does, so we're going to go out and find out."
Ed Warnock is the chief executive officer of the Perlan Project.
He says the project intends to discover how fast moving winds at altitudes between 10 and 50 kilometers influence the earth's climate.
"It turns out some of the biggest waves in the world -- vertical 4 movements -- exist in the stratosphere. We're going to go and study those waves. Those waves change weather and they change climate, and we are going to study how do they do that."
Stratospheric winds may also influence commercial air traffic. Many airplanes fly at high altitudes to reduce fuel consumption.
The air density 5, or thickness, at those altitudes is similar to the atmosphere on the planet Mars. This may lead to future aircraft designs that could someday fly through the skies of the Red Planet.
Words in This Story
altitude – n. the height of something such as an airplane above the level of the sea
atmosphere – n. the whole mass of air that surrounds the Earth
meteorologist – n. a scientist who deals with the atmosphere and with weather
stratosphere – n. the upper layer of the Earth’s atmosphere that begins about 11 kilometers above the Earth’s surface and ends about 50 kilometers above the Earth’s surface
- The glider was soaring above the valley.那架滑翔机在山谷上空滑翔。
- The pilot managed to land the glider on a safe place.那个驾驶员设法让滑翔机着陆到一个安全的地方。
- The albatross is the king of gliders. 信天翁是滑翔鸟类之王。 来自《用法词典》
- For three summers, may bested and improved their gliders. 他们花了三个夏天不断地测试、改进。 来自英汉非文学 - 科学史
- The world's entire aerospace industry is feeling the chill winds of recession.全世界的航空航天工业都感受到了经济衰退的寒意。
- Edward Murphy was an aerospace engineer for the US Army.爱德华·墨菲是一名美军的航宇工程师。