AI.VIII.D.K1FAA-S-ACS-25 · Nov 2023Knowledge

Purpose of and procedures for straight descents and descending turns.

ACS element text (the applicant demonstrates understanding of)

Purpose of and procedures for straight descents and descending turns.

Bottom line

A glide is a basic maneuver in which the airplane loses altitude in a controlled descent with little or no engine power.

Key numbers

Key numbers for Purpose of and procedures for straight descents and descending turns.
NumberWhat it means
500 fpm for a partial power descentTarget rate
no greater than 1.3 VSO for a minimum safe airspeed descentMin safe speed
10 percent of descent rate (100 feet for 1,000 fpm)Level-off lead

FAA references

  1. AFH ch. 3 (pp. 3-20–3-22) — FAA-H-8083-3C
  2. PHAK ch. 14 (p. 14-28) — FAA-H-8083-25C (2023)
  3. PHAK ch. 5 (p. 5-25) — FAA-H-8083-25C (2023)
Members lesson

Build understanding you can use

Unlock the full lesson and continue studying this element.

  • Full teaching sections: What it is; Key points; Rules and numbers; How it is done
  • Check your understanding with answers you can reveal
  • Common mistakes paired with the FAA facts that correct them
View membership options