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