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Warm-Up – 11/20 – 10 minutes

Warm-Up – 11/20 – 10 minutes. Utilizing your notes and past knowledge answer the following questions: An aircraft propeller functions like a _______ _____? Which edge of a propeller blade hits the relative wind first? How is pitch of a propeller measured?

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Warm-Up – 11/20 – 10 minutes

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  1. Warm-Up – 11/20 – 10 minutes Utilizing your notes and past knowledge answer the following questions: • An aircraft propeller functions like a _______ _____? • Which edge of a propeller blade hits the relative wind first? • How is pitch of a propeller measured? • (True / False) - the area of decreased pressure is in front of the propeller, and the force (thrust) is in a forward direction. • What design factor is utilized on a propeller blade to keep thrust more nearly equalized along this length?

  2. Questions / Comments

  3. Warm-Up – 11/20 – 10 minutes Utilizing your notes and past knowledge answer the following questions: • An aircraft propeller functions like a _______ _____? • Which edge of a propeller blade hits the relative wind first? • How is pitch of a propeller measured? • True / False - the area of decreased pressure is in front of the propeller, and the force (thrust) is in a forward direction. • What design factor is utilized on a propeller blade to keep thrust more nearly equalized along this length?

  4. Basic Propeller Principles • The aircraft propeller consists of two or more blades and a central hub to which the blades are attached. • Each blade of an aircraft propeller is essentially a rotating wing.

  5. Warm-Up – 11/20 – 10 minutes Utilizing your notes and past knowledge answer the following questions: • An aircraft propeller functions like a _______ _____? • Which edge of a propeller blade hits the relative wind first? • How is pitch of a propeller measured? • True / False - the area of decreased pressure is in front of the propeller, and the force (thrust) is in a forward direction. • What design factor is utilized on a propeller blade to keep thrust more nearly equalized along this length?

  6. Basic Propeller Principles • The chord line is an imaginary line drawn through the blade from its leading edge to its trailing edge. • As in a wing, the leading edge is the thick edge of the blade that meets the air as the propeller rotates.

  7. Warm-Up – 11/20 – 10 minutes Utilizing your notes and past knowledge answer the following questions: • An aircraft propeller functions like a _______ _____? • Which edge of a propeller blade hits the relative wind first? • How is pitch of a propeller measured? • True / False - the area of decreased pressure is in front of the propeller, and the force (thrust) is in a forward direction. • What design factor is utilized on a propeller blade to keep thrust more nearly equalized along this length?

  8. Basic Propeller Principles • The pitch is the distance in inches, which the propeller would screw through the air in one revolution if there were no slippage.

  9. Warm-Up – 11/20 – 10 minutes Utilizing your notes and past knowledge answer the following questions: • An aircraft propeller functions like a _______ _____? • Which edge of a propeller blade hits the relative wind first? • How is pitch of a propeller measured? • True / False - the area of decreased pressure is in front of the propeller, and the force (thrust) is in a forward direction. • What design factor is utilized on a propeller blade to keep thrust more nearly equalized along this length?

  10. Basic Propeller Principles • The airflow over the wing has less pressure, and the force (lift) is upward. • Instead of a horizontal plane, the area of decreased pressure is in front of the propeller, and the force (thrust) is in a forward direction.

  11. Warm-Up – 11/20 – 10 minutes Utilizing your notes and past knowledge answer the following questions: • An aircraft propeller functions like a _______ _____? • Which edge of a propeller blade hits the relative wind first? • How is pitch of a propeller measured? • True / False - the area of decreased pressure is in front of the propeller, and the force (thrust) is in a forward direction. • What design factor is utilized on a propeller blade to keep thrust more nearly equalized along this length?

  12. Basic Propeller Principles • Propeller blades are twisted to change the blade angle in proportion to the differences in speed of rotation along the length of the propeller, keeping thrust more nearly equalized along this length.

  13. Questions / Comments

  14. THIS DAY IN AVIATION • November 20 • 1919 — The first municipal airport in the United States opens in Tucson, Arizona and is still in use today.

  15. THIS DAY IN AVIATION • November 20 • 1943 — United States troops invade Makin and Tarawa in the Gilbert Islands

  16. THIS DAY IN AVIATION • November 20 • 1953 — The first man to exceed Mach 2 is American test pilot Scott Crossfield in a Douglas D-558-2 “Skyrocket.”

  17. THIS DAY IN AVIATION • November 20 • 1957 — The Vertol 105 twin-turbine powered helicopter, using two Lycoming T-53B's, flies for the first time

  18. THIS DAY IN AVIATION • November 20 • 1959 — Discoverer VIII satellite is launched into orbit from Cape Canaveral, Florida.

  19. THIS DAY IN AVIATION • November 20 • 1963 — The USAF accepts its first two McDonnell Douglas F-4C “Phantom II” jet fighters.

  20. Questions / Comments

  21. November 2013

  22. Questions / Comments

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