AM.III.M.S4

From the FAA library

• Aviation Maintenance Technician Handbook - Airframep. 2-51
  Chapter 2: Aerodynamics, Aircraft Assembly, & Rigging › Rigging Checks › Control Surface Travel

  each other and of the frame. (The center spirit level is used to position the frame vertically when measuring propeller blade angle.) The center spirit level is used to position the disc when measuring control surface travel. A disc ... advance in opposite directions. A double 10-part vernier is marked on the ring. Figure 2-90. Universal propeller protractor. The rigging of the trim tab systems is performed in a similar manner. The trim tab control…

• Pilot's Handbook of Aeronautical Knowledgep. 3-7
  Chapter 3: Aircraft Construction › Alternate Types of Wings › The Powerplant

  angle of a propeller blade, as measured against the hub of the propeller, keeps the angle of attack (AOA) (See definition in Glossary) relatively constant along the span of the propeller blade, reducing or eliminating the possibility of a stall ... angle at which the relative wind meets the blade. The AOA continuously changes during the flight depending upon the direction of the aircraft. Figure 3-13. Engine compartment. The pitch is defined as the distance a propeller would travel…

• Pilot's Handbook of Aeronautical Knowledgep. 5-28
  Chapter 5: Aerodynamics of Flight › Basic Propeller Principles

  wing, the leading edge is the thick edge of the blade that meets the air as the propeller rotates. Blade angle, usually measured in degrees, is the angle between the chord of the blade and the plane of rotation ... measured at a specific point along the length of the blade. [Figure 5-44] Because most propellers have a flat blade “face,” the chord line is often drawn along the face of the propeller blade. Pitch is not blade angle…