Bilingual edition: English is preserved and Chinese follows each unit. Terminology uses the confirmed v20260916 glossary; automated semantic review remains traceable.
中英双语版：英文原文完整保留，中文紧随对应单元；术语采用 v20260916 确认表，自动语义审校结果可追溯。

Airplane in Wind: Wind Velocity Calculation

有风时的飞机：风速计算
Velocity unit
If your airspeed indicator and compass indicate a velocity of the airplane
with respect to air of: = at °
But your GPS receiver indicates a ground speed and bearing of = at °
Then the wind velocity in which you are flying is = at °

Note: The wind direction in this calculation is the direction of air motion, not the direction from which the wind is coming. So if you call a wind from the north a "north wind", then the air motion direction is south and you would enter 180° for the wind angle.

注意：本计算中的风向是指空气的运动方向，而不是风的来源方向。所以如果你把从北边吹来的风称为“北风”，那么空气的运动方向是南，你应该将风向角输入为180°。

Details about calculation

计算详情
Alternate calculations:
其他计算方法：
 Ground Velocity
接地速度
 Desired heading and resultant
期望的标题和结果
速度单位：如果你的空速仪和罗盘显示飞机相对于空气的速度为：= at °，但你的GPS接收器显示地面速度和方位角为= at °，那么你正在飞行的风速为= at °。
中文译文中的待填/计算数值依次对应：1：u1 2：a 3：u2 4：aa 5：b 6：u3 7：ab 8：c 9：u4 10：ac。实际数值以上方原输入框为准。
 Index

Relative velocity
索引 相对速度
 
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力学
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Discussion of Airplane in Wind

风中的飞机讨论

 Navigation directions are usually expressed in terms of compass angles as illustrated. The vector addition necessary to calculate resultant velocity is carried out by calculating the components of each vector.
导航方向通常用罗盘角度来表示，如图所示。计算 resultant velocity 所需的矢量加法，是通过计算每个矢量的分量来实现的。
There are some practical problems associated with this calculation: you can either convert compass angles to standard angles, or do the calculation in compass angles with the relationships shown. If you calculate the standard angle for the final bearing, it can then be converted to compass angle. A final problem is the arctan problem with calculators and computer languages: you have to check the quadrant to be sure you get the correct angle.

Calculation

计算
这种计算有一些实际问题：你可以将罗盘角度转换为标准角度，或者在罗盘角度下进行计算，使用所示的关系。如果你计算最终方位的标准角度，它可以转换为罗盘角度。另一个问题是计算器和计算机语言中的反正切问题：你必须检查象限，以确保得到正确的角度。
 Index

Relative velocity
索引 相对速度
 
HyperPhysics***** Mechanics
力学
R Nave
 Go Back
返回