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The only cause of a -stall is excessive AOA. Stalls result in decreased lift, increased drag, and an altitude loss. They are particularly dangerous at low altitude or when allowed to develop into a spin. The only action necessary for stall recovery is to decrease the AOA below CLmaxAOA. Numerous devices may give the pilot a warning of an approaching stall. They include AOA indicators, rudder pedal shakers, stick shakers, horns, buzzers, warning lights and electronic voices. Some of these devices receive their input from attitude gyros, accelerometers, or flight data computers, but most receive input from an AOA probe.
7. What is the primary source of directional control? "8. Define airplane center of gravity. 2-9 9. List the three airplane axes and the motions that occur about each. 10. Define wingspan. 11. What is the difference between chordline, chord, tip chord, root chord and average chord? 12. Define wing area, and state the formula for calculating it. 13. Define taper, taper ratio, and sweep angle. 14. What is aspect ratio? What type of aspect ratio would you expect to find on a 852 bomber? A High performance fighter?
31 Define Mach number and critical Mach number. 32 Describe the effect of altitude on Mach number and critical Mach number. 11 and answer the Study Questions. 3-2 INFORMATION SHEET Basic Aerodynamic Principles Information Sheet No. 11 INTRODUCTION Before we discuss the forces of lift and drag, we need to have an understanding of how air particles and groups of air particles behave. REFERENCES 1. Aerodynamics for Naval Aviators 2. Aerodynamics for Pilots, Chapter 2, Chapter 20 (Pages 147-148) 3.