Axes of movement — Transcript

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1. 0:02An aircraft is an amazing machine
2. 0:04capable of flying in any direction by
3. 0:06rotating about in three dimensions.
4. 0:10These are called axes of movement.
5. 0:13[Music]
6. 0:18The average location of an aircraft's
7. 0:20mass is a point that is called the
8. 0:22center of gravity.
9. 0:24So if you suspend an aircraft from the
10. 0:26center of gravity by a line like this,
11. 0:30the aircraft remains perfectly balanced.
12. 0:34Each of the three axes moves about the
13. 0:36center of gravity.
14. 0:39The aircraft's principal axes are normal
15. 0:42axis drawn from top to bottom, lateral
16. 0:46axis drawn parallel to the wings and
17. 0:50longitudinal axis drawn from tail to
18. 0:53nose. Each axis is perpendicular to the
19. 0:56other two axes.
20. 0:59Let's look at each individually.
21. 1:03The rotation about lateral axis is
22. 1:06called pitch.
23. 1:08This movement changes the vertical
24. 1:10direction of the aircraft's nose.
25. 1:14The rotation about normal axis is called
26. 1:17yaw.
27. 1:19This is the movement of the nose of the
28. 1:21aircraft from side to side.
29. 1:25The rotation about the longitudinal axis
30. 1:28is called roll.
31. 1:30This is the movement of the aircraft's
32. 1:32wings. One wing goes up, the opposite
33. 1:36wing goes down.
34. 1:39So in summary, these are the three
35. 1:41principal axes of movement.
36. 1:53[Music]
37. 2:07[Music]