An aircraft in the form of multi-stage missile 1 with a spiral inducing assembly 2 which is capable of inducing the missile to travel in a continuous spiraling motion without the missile rolling. A fin 6a is attached to a tube 3 that is able to rotate around the encircled part of the fuselage. The fin 6a is able to rotate in a pivoting manner on the rotate-able tube 3 with respect to the rotate-able tube 3, thereby changing the pitch relative to the longitudinal axis of the rotate-able tube 3. Fin 6a is rotated to a greater than another fin on the right side of the tube 3. The difference in degree of rotation between the fins makes the fin 6a exert a greater force on the rotate-able tube 3 than the fin on the right side when the fins are rotated in the same direction. The imbalance between the rotational forces thus causes the rotate-able tube 3 to rotate. When rotated, the fins would exert a lateral force on the rotate-able tube 3. Thus, as well as forcing the rotate-able tube 3 to rotate, the fins would also push the rotate-able tube sideways. But as the rotate-able tube is pushed sideways, it rotates, and hence the lateral direction of push constantly revolves, causing a spiraling motion of the missile when in flight. Rotation of the fins is activated automatically by separation of sections of the main body.