AA.I.DFAA-S-ACS-11A · Nov 2023
High-Altitude Aerodynamics (ATP) (AMEL, AMES)
To determine the applicant exhibits satisfactory knowledge, risk management, and skills associated with high altitude airplane aerodynamics. Note: See Appendix 1: Practical Test Roles, Responsibilities, and Outcomes and Appendix 3: Aircraft, Equipment, and Operational Requirements & Limitations for information related to this Task.
Bottom line
Mach buffet arises when airflow separates on the upper surface of a wing behind a shock wave. The altitude at which an airplane flying at MMO would experience buffeting with any increase in AOA determines the absolute or aerodynamic ceiling.
FAA references
- AFH ch. 16 (p. 16-6) — FAA-H-8083-3C
- AC 61-107, para. 3-2 — AC No: 61-107B
Knowledge
- AA.I.D.K1: Aerodynamics of large transport category airplanes, including flight characteristics of swept wing airplanes (e.g., Mach buffet).
- AA.I.D.K2: Energy management.
- AA.I.D.K3: Relationship between Mach number, indicated airspeed, true airspeed, and change over altitudes.
- AA.I.D.K4: Load factor at high altitude and its effect on high and low speed operating margins.
- AA.I.D.K5: Relationship between altitude capability, weight, and temperature.
- AA.I.D.K6: Maximum Operating Speed - Knots (VMO) / Maximum Operating Speed - Mach (MMO) convergence and stall angle of attack.
- AA.I.D.K7: Maximum Lift over Drag Ratio (L/DMAX).
- AA.I.D.K8: Best range and best endurance.
- AA.I.D.K9: Factors which contribute to airplane upsets at high altitude and upset prevention and recovery techniques.
Risk management
Skills
Build understanding you can use
Unlock the full lesson and continue studying this element.
- Full teaching sections: Task bottom line
- Check your understanding with answers you can reveal