What does the 35-foot height refer to in takeoff distance terminology?

• A. The height at which the takeoff distance is measured.
• B. The height at which the stall occurs.
• C. The height of the aircraft's tail.
• D. The height used for landing distance.

Answer: (A)

Takeoff distance uses a fixed reference height to mark the end of the measurement. The 35-foot height is the altitude above the surface at which the takeoff distance is defined. In other words, the distance you need on the runway is measured from the start of takeoff power until you reach a height of 35 feet and are climbing safely. This standard height lets you compare performance data across different aircraft and conditions. It isn’t related to stall height, tail height, or to the measurement used for landing distance, which use different references.