Definition
Controlled flights conducted by the manufacturer under carefully measured conditions to gather the performance data published in the Pilot's Operating Handbook (POH) and Aircraft Flight Manual (AFM). These flights are flown by experienced test pilots using a new aircraft with a clean, properly rigged airframe and a smoothly running engine, in order to establish baseline performance figures such as takeoff distance, climb rate, cruise speed, and landing distance.
Plain English
The flights the manufacturer flies to measure how the aircraft performs, so the numbers in the handbook have a real source. Those numbers come from a brand-new aircraft flown by a skilled test pilot in good conditions.
Context Anchor
Seen in aircraft performance discussions when the handbook explains where performance chart numbers come from.
Why Pilots Care
Knowing that performance figures come from controlled test flights reminds pilots to account for real-world variables like pilot technique and environmental differences.
Intuition Check
Test flights do not mean casual flights where someone simply tries something out. In this context, they are planned flights used to gather or confirm specific aircraft information.
Example Sentence 1
The takeoff distance shown in the chart was established during manufacturer test flights, so the instructor reminded the student to add a margin for the aircraft's age and engine wear.
Example Sentence 2
A pilot reviewing performance charts should remember that the published values were obtained during carefully executed test flights.