BEIJING, Oct. 14 -- An aviation brigade of the PLA Air Force has conducted intensive flight training recently. During the combat training of the J-20 fighter jets, the onboard pilots have to pull 7 to 8 G forces, which will lead to insufficient blood supply to brain, or even blackout if it gets worse. Faced with numerous challenges, the J-20 pilots must always keep sober and accurately manipulate the aircraft.
