AI.X.B.K7dFAA-S-ACS-25 · Nov 2023Knowledge

d. Best glide speed

ACS element text (the applicant demonstrates understanding of)

Airspeeds specific to the airplane for various operations, how to identify them on the airspeed indicator (if applicable), and their significance in airplane performance, including: d. Best glide speed

Bottom line

In this incident, the pilot established the "best glide" speed of 110 knots, as published in that aircraft's Pilot's Operating Handbook (POH).

Key numbers

Key numbers for d. Best glide speed
NumberWhat it means
110 knots (as published in the POH for the aircraft in the cited incident)Best glide
10 percent of descent rate (100 feet if descending 1,000 feet per minute), after a complete power failureLevel-off lead

FAA references

  1. PHAK ch. 7 (p. 7-7) — FAA-H-8083-25C (2023)
  2. AFH ch. 3 (pp. 3-23–3-24) — FAA-H-8083-3C
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