Actual requirements:
https://www.flightglobal.com/news/ar...rement-414531/
In a 10 July statement, the Air Education and Training Command (AETC) confirmed that the minimum T-X sustained g requirement of 6.5g and objective of 7.5g remains unchanged from the key performance parameter published in March, even though it would exclude a number of viable trainer options from the competition.
The requirement sets a high bar for manoeuvrability, requiring the T-X to sustain that load at a pressure altitude of 15,000ft for at least 140˚ of a full turn with minimal loss of energy and altitude.
“Initiated at or above 15,000ft pressure altitude, at or below Mach 0.9, and at or above 80% fuel weight, the aircraft’s flight path angle during this manoeuvre can be no lower than 15˚ nose low while losing no more than 2,000ft of vertical altitude and 10% of the initial airspeed,” the AETC says.