One of the earliest, Solar Challenger, flew across the English Channel in 1981.
早在1981年,太阳挑战号就成功飞越英吉利海峡。
It was built by the late Paul MacCready, an American aeronautical engineer.
这架飞机由已故美国航空工程师保罗?麦卡克莱迪建造。
Its 14.3-metre wing was covered in photovoltaic cells.
其14.3米长的机翼上布满了光生伏打电池。
These powered two electric motors, which in turn drove a single propeller.
推动唯一螺旋桨发动的两台电动机正是由这些电池供电。
The Solar Impulse project is a very different beast.
然而太阳驱动计划却开辟了一片新天地。
The prototype aircraft which will fly across America has a wingspan of 63.4 metres, which isas big as a jumbo jet s.
飞越美国的原型机翼展宽达63.4米,与巨型喷气式飞机同宽。
Yet its fuselage is as slender as a glider s and its single-person cockpit is cramped.
而其机身却与滑翔机一般大小,窄小的驾驶舱只能容下一名飞行员。
The wings are covered in almost 12,000 photovoltaic cells, which can simultaneously run itsfour electrically driven propellers while charging four packs of lithium-polymer batteries.
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