Missile spiralling mechanism - 2

Abstract From the Canadian patent

A missile 1 with a spiral inducing assembly 2 which is capable of inducing the missile to travel in a continuous spiralling motion without the missile rolling. Two fins 3 and 4 are attached to a tube 5 that is able to rotate around the encircled part of the missile fuselage. The fins 3 4 are, able to rotate in a pivoting manner on the rotatable tube 5 with respect to the rotatable tube 5, thereby changing their pitch relative to the longitudinal axis of the rotatable tube 5. Fin 3 is larger than fin 4. The difference in sizes between the fins makes the larger fin 3 exert a greater force on the rotatable tube 4 than the smaller fin 4 when the fins are pitched in unison. The aerodynamic …