Forming temporary airborne images

A projectile for deployment from a barrel assembly including a barrel having a plurality of said projectiles axially disposed within the barrel and which are associated with discrete selectively ignitable propellant charges for propelling the projectiles sequentially through the muzzle of the barrel, said projectile including:

• housing portion containing material for forming temporary airborne images;
• an initiator;
• a propellant capsule associated with the rear end of the housing whereby the propellant charge is ignited by activating the initiator;
• a fuse link to provide delayed ignition of the pyrotechnic material;
• a expandable collar wherein said collar is engaged with the housing for support and in operative sealing engagement with the bore of the barrel in an engaged condition and wherein said collar is relocatable relative to the housing whereby said collar is disengaged from operative sealing engagement with bore of the barrel in a relaxed condition for trailing movement with the housing, and wherein the expandable collar provides an open trailing end which engages about the nose of a following projectile or the breech end of the barrel in the case of the last projectile, and
• a pressure member mounted on the housing inwardly of the open trailing end wherein said collar is relocated from the engaged condition upon ignition of the propellant and is retained in a relaxed condition by the pressure member for passage through the barrel and out the muzzle of the barrel.