How long should it take to flight-test an aircraft, develop a POH, or fly the EAA Phase I Flight Cards? Is 20 minutes enough? This project rapidly tested more than 60 airplanes to determine V-speeds, climb performance, dynamic stability, and takeoff and landing distances. This briefing covers the flight test maneuvers, data analysis methods, and results for aircraft, including the P-51D Mustang, T-6 Texan, Northrop T-38, Luscombe 8E, RV-10, RANS S-21, and dozens of other aircraft. The 20-Minute Flight Test project started in 2021 to demonstrate design principles to my Aircraft Design and Flight Test Engineering classes. The maneuvers get rich information from a short flight test, even with untrained test pilots. I introduce pilots to flight test techniques such as level accelerations, saw tooth climbs, and control doublets so that we can exercise the performance limits of the aircraft and record the responses with a high-frequency flight data recorder. Session type: Forum — Skyfarer is not affiliated with the Experimental Aircraft Association (EAA) or EAA AirVenture Oshkosh. This session is listed for informational purposes from the official AirVenture 2026 schedule. Times and locations can change during the event — verify on the official session page: https://events.rdmobile.com/Sessions/Details/3580557