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CA.IV.I.K2FAA-S-ACS-7B · Nov 2023Knowledge

Best angle of climb speed (VX) and best rate of climb speed (VY).

ACS element text (the applicant demonstrates understanding of)

Best angle of climb speed (VX) and best rate of climb speed (VY).

Bottom line

Best rate-of-climb speed (VY)—the airspeed that provides the most altitude gain in a given period of time. When a safe airspeed is achieved, establish the pitch attitude for the best rate of climb (VY) and complete the climb checklist.

Key numbers

Key numbers for Best angle of climb speed (VX) and best rate of climb speed (VY).
NumberWhat it means
short-field takeoff to clear an obstacleVX use

FAA references

  1. PHAK ch. 8 (p. 8-10) — FAA-H-8083-25C (2023)
  2. SEA ch. 4 (p. 4-12) — FAA-H-8083-23
  3. AFH ch. 16 (p. 16-17) — FAA-H-8083-3C
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