AA.I.D.K5FAA-S-ACS-11A · Nov 2023Knowledge
Relationship between altitude capability, weight, and temperature.
Relationship between altitude capability, weight, and temperature.
Bottom line
Pilots should also understand the possible consequences of choosing a cruising altitude that exceeds the airplane’s performance capabilities for the conditions existing at the time of the flight. The combination of high temperature and high elevation affects aircraft performance.
Key numbers
| Number | What it means |
|---|---|
| 135 kts, 1.0 G buffet-free margin in a typical jet aircraft at FL 350 | Buffet margin FL350 |
| 26 kts, 1.0 G buffet-free margin in a typical jet aircraft at FL 450 | Buffet margin FL450 |
| 100 ft/min rate of climb, maximum height above MSL under normal conditions | Service ceiling |
FAA references
- AC 120-111 Appendix 1 — AC No: 120-111
- RMH ch. 3 (p. 3-7) — FAA-H-8083-2A
- AC 61-107, para. 3-3 — AC No: 61-107B
- AC 61-107, para. 1-4 — AC No: 61-107B
- AFH ch. 6 (p. 6-11) — FAA-H-8083-3C
- AC 61-138, paras. 14.1.1.1, 14.1.1.2 — AC No: 61-138A
- AC 61-138, para. 17.1.2.2 — AC No: 61-138A
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