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PA.V.B.K3FAA-S-ACS-6C · Nov 2023Knowledge

Effects of bank angle and groundspeed on rate and radius of turn.

ACS element text (the applicant demonstrates understanding of)

Effects of bank angle and groundspeed on rate and radius of turn.

Bottom line

If it is not banked, there is no force available to cause it to deviate from a straight flight path. An increase in speed causes a decrease in the ROT when using the same bank angle. An aircraft traveling at 120 knots is able to turn a 360° circle in a tighter radius than an aircraft traveling at 240 knots.

Key numbers

Key numbers for Effects of bank angle and groundspeed on rate and radius of turn.
NumberWhat it means
2.62 degrees per second at 240 knots with a 30° bankRate of turn
49° angle of bank for 5.25° per second at 240 knotsBank for rate
2,100 feet radius at 65 knots glide speed, 3° per secondStandard rate radius

FAA references

  1. PHAK ch. 5 (p. 5-23) — FAA-H-8083-25C (2023)
  2. PHAK ch. 5 (p. 5-39) — FAA-H-8083-25C (2023)
  3. AFH ch. 7 (p. 7-3) — FAA-H-8083-3C
  4. AFH ch. 7 (p. 7-5) — FAA-H-8083-3C
  5. AFH ch. 7 (p. 7-10) — FAA-H-8083-3C
  6. AFH ch. 7 (p. 7-11) — FAA-H-8083-3C
  7. AFH ch. 7 (p. 7-12) — FAA-H-8083-3C
  8. AFH ch. 18 (p. 18-9) — FAA-H-8083-3C
  9. AFH ch. 7 (p. 7-8) — FAA-H-8083-3C
  10. AFH ch. 7 (p. 7-13) — FAA-H-8083-3C
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