目前对飞船只进行了一些低海拔的飞行测试，平流层的测试则仅仅是由气象探测气球负载着规模缩小的模型原型机来进行的。
So far, apart from some low-altitude test flights, the only stratospheric tests have involved a scaled-down version tethered to a weather balloon.
还有就是要求所有设计的飞行器的速度必须不低于85%音速水平；航程必须达到7000英里；在负载量上无论乘客还是货物必须达到50,000到100；000磅。
And each design has to fly up to 85 percent of the speed of sound; cover a range of approximately 7, 000 miles; and carry between 50, 000 and 100, 000 pounds of payload, either passengers or cargo.
U8E最高飞行速度一小时150公里，续飞时间四个小时，航程150公里（从操作员）和负载40公斤（88磅）。
The U8E has a top speed of 150 kilometers an hour, endurance of four hours, range (from operator) of 150 kilometers and a payload of 40 kg (88 pounds).
飞机液压系统作为飞机飞行控制系统和起落架等负载的动力源，对飞机的安全飞行起着关键的作用。
As the power source of the aircraft flight control system and landing gear loads, aircraft hydraulic system plays a key role for the safety of aircraft flying.
请注意，飞行员的负载是由小部分的伞体及较少的伞绳支撑着。
Note that the pilot's load is supported by a smaller portion of the wing and less lines.
这种情形会发生于飞行伞的翼负载相当于攻角时。
This occurs at one angle of attack for the same wing loading of a paraglider.
飞机在不同的飞行阶段和飞行状态下，由于作用在控制面上的气动负载不同，因而由铰链力矩引起的液压作动筒压力也在变化。
On military aircraft, hydraulic pressures of actuators caused by hinge torque vary with aerodynamic force on control surface due to different flight states.
飞机在不同的飞行阶段和飞行状态下，由于作用在控制面上的气动负载不同，因而由铰链力矩引起的液压作动筒压力也在变化。
On military aircraft, hydraulic pressures of actuators caused by hinge torque vary with aerodynamic force on control surface due to different flight states.
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