Allegedly， the J20abnormal aerodynamic layout for crab first maneuver, was" floats" is a long distance. by surprise attack side incoming enemy aircraft,。
full motion + differential tail duck wing is to produce abnormal level to the motor, the motor is actually j-20 stealth fighter crab in imitation of racing elegant effect, in order to achieve instant formation of large torque, can make the level" flick". Motor and can use inertial make sliding distance longer transverse drift.
All movable control surface why difference? Is for the flowing time by adjusting the rudder maintain the orientation of the plane of the balance.
In the racing field lateral maneuver called four wheel drift, in the plane of the test system for lateral maneuver called crab motor is actually going on, crab motor uses the inertia pulling out, drawback is that the slip process speed will be greatly slowed down, in a supersonic cruise when once the crab motor, speed will quickly over to below the speed of sound a long time, so the lateral motor is relatively long, but may not be very long.
J20 can make longer crab motor because of its differential rudder in a routine flight to provide extremely strong balance performance but crab time lead to stall is excessive or to alter flight direction or will head twisted back to the straight line direction.
Although the crab motor cannot persist. But its abnormal differential rudders can let the nose and the direction of travel of a thirty degrees angle always fly down is" oblique flying" or half crab motor.
