| 21. | The pitch angle is relative to the horizon.
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| 22. | The previous torque rotor-speed diagrams are all plots when the pitch angle, \ beta, is zero.
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| 23. | A control stick cyclically controls rotor pitch angle.
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| 24. | Initially, the aircraft climbs with a pitch angle of 45 degrees using engine thrust and elevator controls.
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| 25. | There were also high side forces which resulted from yaw and weak propeller blade pitch angle controls.
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| 26. | A horizontal tailplane maintains the aircraft pitch angle in flight and a large fin and rudder is provided.
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| 27. | "During this descent, the airplane reached a maximum nose-down pitch angle of about 40 degrees, " said Hall.
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| 28. | The instrument measured the pitch angles of solar wind electrons reflected from the Moon by lunar magnetic fields.
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| 29. | The most familiar kinds of bevel gears have pitch angles of less than 90 degrees and therefore are cone-shaped.
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| 30. | This maintains a constant aircraft attitude, with unchanging pitch angle relative to the airstream, without active input from the pilot.
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