通常,没有水平尾翼的飞机被称为“无尾飞机”。飞机在飞行中其升力作用点(气动力中心)在飞机重心之后,因而产生低头力矩,正常式布局的飞机靠水平尾翼产生一个向下的负升力(使飞机产生抬头力矩),来保持飞机的纵向平衡;而无尾飞机则要在机翼后缘装升降副翼,在飞行中靠升降副翼向上偏转产生向下的负升力,来平衡上述的低头力矩。机身两侧的升降副翼在同向上下偏转时起平尾升降舵的作用;在左右反向差动时,起副翼的作用,可操纵飞机滚转和转弯。无尾飞机在机翼后缘装有升降副翼,因而无法在机翼后缘再装高效增升装置(增升的襟翼),使其起飞着陆性能变 In general, an airplane without a horizontal tail is called a “tailless airplane.” Aircraft in flight its point of application of lift (aerodynamic center) produces a bow moment after the center of gravity of the aircraft, and a normal layout of the aircraft produces a downward negative lift (resulting in a cranking torque on the tailplane) by the tailplane to maintain the aircraft’s Longitudinal balance; and non-tail aircraft will be equipped with lifting aileron in the trailing edge of the wing, upside down aileron in flight to produce a downward negative lift, to balance the bow of the moment. Lifting aileron on both sides of the fuselage in the same up and down deflection from the tail elevator function; in the left and right reverse differential, the role of the aileron, you can manipulate the aircraft rolling and turning. The tailless aircraft is equipped with a lift aileron on the trailing edge of the wing so that it is not possible to re-install a highly efficient lifting device (raised flaps) at the trailing edge of the wing so that its takeoff landing capability changes