Abstract: A projectile body intended to evolve in a fluid, such body equipped with at least two radially deployable control surfaces, such control surfaces being accommodated prior to their deployment in housings made in the body, such that the housings communicate at their intersection point, each housing being blocked by sealing device preventing any fluid from the exterior of the projectile body from passing through the housings when the control surfaces are deployed.

Abstract: A projectile body intended to evolve in a fluid, such body equipped with at least two radially deployable control surfaces, such control surfaces being accommodated prior to their deployment in housings made in the body, body in which the housings communicate at their intersection point, each housing being blocked by sealing means preventing any fluid from the exterior of the projectile body from passing through the housings when the control surfaces are deployed.

Abstract: A device for driving in rotation fins of a projectile, the fins being of the deployable type integral with fin heads which are able to be oriented along an axis of spin (X, Y) substantially orthogonal to a projectile's longitudinal axis (Z), wherein the fin heads are driven in rotation by motors and substantially ring sector-shaped sliders which slide in a circular groove.

Abstract: A device for driving in rotation fins of a projectile, the fins being of the deployable type integral with fin heads which are able to be oriented along an axis of spin (X, Y) substantially orthogonal to a projectile's longitudinal axis (Z), wherein the fin heads are driven in rotation by motors and substantially ring sector-shaped sliders which slide in a circular groove.

Abstract: A device including a ring for linking a case and a projectile carrying a sealing band having a rear skirt providing low pressure sealing and a front rib lodged in a first groove in the projectile. The ring has a flared rear part connected with the case and a front part connected with the projectile by attachment means. The front part of the ring is lodged between the rear skirt of the band and the projectile and has a lip co-operating with the first groove or with a second groove in the projectile. A process for mounting the sealing band and ring to link the case and projectile includes sliding the sealing band and ring along the projectile in a single operation.