它也无需尾部旋翼。
智能旋翼技术是目前直升机界的研究热点。
The smart rotor technology is the present hotspot in the helicopter world.
最后的设计具有一个主旋转器，也就是旋翼。
与国外先进旋翼技术相比，我们有相当的差距。
Compared with foreign advanced tilt-rotor technology, we have quite a gap.
此外走进尾桨或主旋翼是一个安全关切的旁观者。
Additionally walking into the tail rotor or main rotor is a safety concern for bystanders.
他说：“旋翼飞机在军事和商业上都发挥着关键的作用。
"Rotor craft specifically play a critical role for both military and commercial applications," he said.
在紧急情况下，即使16个旋翼中有4个出现问题飞机也能降落。
In an emergency, it can land even if four of its 16 rotors fail.
提出一种面向设计的复合材料旋翼桨叶结构动力优化方法。
A design oriented method for the dynamic design optimization of composite rotor blades is presented.
直升机与其他航空飞行器最本质的区别就在于它的旋翼系统。
Helicopters and other air craft the most essential distinction lies in its tilt-rotor system.
假设新天空母舰拥有相同的旋翼大小及重量，这些数值将会相同。
Assuming the new Helicarrier has the same size rotors and mass, these values would be the same.
问题不在于相对来说更安静的发动机，而在于发出经典的“呼呼”声的旋翼。
The problem isn't the engine itself; that is actually relatively quiet. It's the rotors that make the classic "whup-whup" sound.
它使用一个安装在后面的推进式螺旋桨并有一对一上一下反向旋转的主旋翼。
The X2 uses a pusher propeller mounted at the rear and has a pair of contra-rotating main rotors, one positioned above the other.
两家公司还为潜在的JFTL方案制定了一个“四倾转旋翼”的概念。
The two companies have also developed a quad tilt-rotor concept for a potential JFTL program.
要降低噪音，最简单的方法是增大旋翼桨叶的夹角，也叫“节距”，或是降低转速。
The simplest way to dampen a helicopter's noise is to increase the Angle of the rotor's blades, also called the pitch, and slow them down.
一旦旋翼大小固定，几乎决定了空气推进速度(如果你知道直升机重量)。
Once you set the rotor size, you pretty much have determined the thrust air speed (if you know the mass of the helicopter).
直升飞机那不停转动的旋翼叶片使其能够在空中悬停，但却限制了它向前的飞行速度。
Helicopters are limited in their forward speed by the spinning rotor blades that make hovering possible.
他会在跑道上追着飞机跑，不怕被拒绝，也不害怕跟飞机的旋翼叶片太近接触。
He would chase it down the runway without fear of rejection or close encounters with the chopper's rotor blades.
但是安装到旋翼驱动轴上的桨叶数量是有限制的，而且飞机的重量同样需要考虑。
But there are limits to how many blades can be tacked onto the rotor's drive shaft, and once again weight becomes a consideration.
V - 22由贝尔直升机公司研发，并同波音旋翼飞机系统部合作一起生产制造。
The V-22 was developed by Bell Helicopter, which manufactures it in partnership with Boeing Rotorcraft Systems.
萤火虫项目是一种单旋翼直升机，使用美国混合动力(US Hybrid)公司制造的电池。
It's a single rotor helicopter powered by batteries made by US Hybrid.
海上测试计划2012年使用一艘法国海军护卫舰和一架波音H-6U“小鸟”旋翼无人机进行。
Sea trials of the demonstrator are planned for 2012 using a French Navy frigate and a Boeing, H-6U Unmanned Little Bird rotorcraft.
增加旋翼桨叶数量也是一种方法，这使得每片桨叶负载的直升机重量降低了，因此产生的噪音更小。
Then there's increasing the number of rotor blades. This helps because each additional blade carries less of the weight of the helicopter, and thus produces less noise.
这意味着它能像直升机一样悬停，但向前飞时可能减少主旋翼的速度并让这两个短翼提供部分提升力。
This means it can hover like a helicopter, but when flying forwards can reduce the speed of the main rotor and let the wings provide part of the lift.
由于60纳米的扭矩，这种自行车比典型的安装了电动旋翼叶毂发动机的自行车有更多动力。
With 60Nm of torque, the bike has a lot more grunt than a typical electric hub-motor installed in bicycles.
沃利斯称：“驾驶旋翼飞机很安全，即使引擎停转，旋翼还会继续转动，所以可以安全着地。”
Wallis said:" They are one of the safest machines to fly because, if the engine stops, the rotors keep turning and you can land."
沃利斯称：“驾驶旋翼飞机很安全，即使引擎停转，旋翼还会继续转动，所以可以安全着地。”
Wallis said:" They are one of the safest machines to fly because, if the engine stops, the rotors keep turning and you can land."
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