If air temperature increases, how is takeoff performance affected?

If air temperature increases, how is takeoff performance affected?

• A. Higher temperatures worsen performance, reducing max takeoff weight.
• B. Higher temperatures improv e performance.
• C. Temperature has no effect.
• D. It only affects landing.

Answer: (A)

When air temperature rises, air becomes less dense. That thinner air means the wings generate less lift for the same airspeed, and engines produce less thrust or less efficient thrust. On takeoff, you rely on enough lift to get airborne at or below a certain speed, and you also rely on sufficient thrust to accelerate to that speed. With less lift and thrust available in hotter air, you need more speed to achieve the same lift, which translates to longer takeoff distances and a lower maximum takeoff weight that can safely clear obstacles and achieve a safe climb. So hotter conditions reduce takeoff performance and effectively reduce the allowable maximum takeoff weight. Temperature does affect takeoff performance; it’s not correct to say it has no effect or that it only affects landing.

When air temperature rises, air becomes less dense. That thinner air means the wings generate less lift for the same airspeed, and engines produce less thrust or less efficient thrust. On takeoff, you rely on enough lift to get airborne at or below a certain speed, and you also rely on sufficient thrust to accelerate to that speed. With less lift and thrust available in hotter air, you need more speed to achieve the same lift, which translates to longer takeoff distances and a lower maximum takeoff weight that can safely clear obstacles and achieve a safe climb. So hotter conditions reduce takeoff performance and effectively reduce the allowable maximum takeoff weight.

Temperature does affect takeoff performance; it’s not correct to say it has no effect or that it only affects landing.