Composite materials have contributed to increased flying distances.

• A. They have contributed to increased flight distances
• B. They are not used in aircraft
• C. They are always heavier than metals
• D. They are never recycled

Answer: (A)

The key idea is that lighter, stronger materials let an aircraft burn less fuel for the same distance, increasing range. Composite materials have a high strength-to-weight ratio and stiffness, so engineers can replace heavier metals with lighter composites without sacrificing structural performance. This weight reduction lowers fuel consumption, which directly expands how far the plane can fly. Composites also resist fatigue and corrosion and can be tailored to carry loads efficiently, which helps maintain efficiency over many flights. In modern aircraft, composites are widely used in wings and fuselage parts, contributing to longer-range capability. Statements claiming composites aren’t used in aircraft, or that they’re always heavier than metals, or that they can’t be recycled, aren’t accurate—composites are common, are often lighter for the same strength, and can be recycled or reused through various processes.