During the early period of rocket development,China had established a rocket mechanical model and,in addition,had determined various external forces (such as engine thrust and aerodynamics) during the process of flight.

• 中国在火箭研制初期，已建立起火箭的力学模型，此外也早已确定了飞行过程中的各种外力（如发动机推力、空气动力）。