Basic Aerodynamics AL0966

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8. 92 inches of mercury at sea level with a temperature of 15C. 39 AL0966 Cluster True - False NOTE: (Each question of this kind consists of a series of statements related to the stem that precedes them. ) 9. A given volume of dry air contains a variety of gases representative of the earth's atmosphere. Indicate which of the following statements most accurately states the composition of this variety. a. Nitrogen, oxygen, argon, carbon dioxide, and minute amounts of other gases. b. Water vapor, dust, and salt particles.

12. HOVERING A helicopter hovers when it maintains a constant position at a selected point in the air, usually a few feet above the ground. To hover, a helicopter main rotor must supply lift to equal the total weight of the helicopter, including crew; fuel; passengers and cargo, if carried; and armament, if armed. The necessary lift is created by rotating the blades at high velocity and increasing the blade angle of attack. 27 At a hover, the rotor system requires a great volume of air upon which to work.

Matching 10. Match the statements in column I with the terms to which they apply in column II by writing the proper letter by each question. Items in column II may be used once, more than once, or not at all. 40 AL0966 Multiple Choice NOTE: (Each question in this group contains one and only one correct answer. ) 11. The blade element located between approximately 25 and 75 percent radius is known as the autorotative or driving region. A. B. C. D. 12. An airfoil's angle of attack is measured between the.

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