Flap extension speed for Flaps 1 through 20 is

• A. 230 knots
• B. 240 knots
• C. 210 knots
• D. 250 knots

Answer: (A)

Flap extension speed is the maximum airspeed at which you may extend the flaps safely. For Flaps 1 through 20, that limit is 230 knots. This speed keeps the wing and flap mechanisms within their design loads as you increase camber and drag with partial and mid-range flap settings. Extending flaps at speeds higher than this could risk structural stress, flutter, or unstable airflow around the flaps during deployment, especially in gusty conditions. The value is chosen to provide enough performance for approach and landing while maintaining a comfortable safety margin across all those flap settings. Other speeds listed would either be unnecessarily restrictive or exceed the published safety limit for this flap range.