For an aircraft with enhanced wingtips, the minimum turn radius obstruction clearance path is determined by which part of the airplane?

• A. Enhanced wingtip
• B. Horizontal stabilizer tip
• C. Wing root
• D. Vertical fin tip

Answer: (A)

The farthest reach of the aircraft during a standard turn is the wingtip, and with enhanced wingtips that outermost point is pushed even farther outward. Obstruction clearance must account for that outer path, since it defines the circle or arc the airplane will sweep while turning. The other parts—like the horizontal stabilizer tip, wing root, or vertical fin tip—stay within that outer envelope and don’t determine the boundary of the turn clearance. So the minimum turn radius clearance is defined by the path traced by the enhanced wingtip.