Pyrotechnic launch tube

A method for making a fiberglass reinforced polymer (FRP) pyrotechnic launch tube, comprising the steps of:

• providing an FRP tube having an upper end, a lower end, an inside wall and a circumferential groove in the inside wall near the lower end;
• and
• engaging a bottom piece in the groove, wherein the bottom piece has a convex surface, and the convex surface and the inside wall of the tube define a chamber for receiving pyrotechnics.

A pyrotechnic launch tube made according to a method, comprising the steps of:

• providing a fiberglass reinforced polymer (FRP) tube having an upper end, a lower end, an inside wall and a circumferential groove in the inside wall near the lower end;
• and
• engaging a bottom piece in the groove.

A fiberglass reinforced polymer (FRP) pyrotechnic launch tube, comprising:

• an FRP having an outside wall, an upper end, a lower end, and a groove on the inside wall around the inner circumference of the tube;
• and
• a bottom protruding into the groove, wherein the bottom has a convex surface, wherein the convex surface of the bottom and the inside wall of the tube form a chamber for receiving pyrotechnics.

A fiberglass reinforced polymer (FRP) pyrotechnic launch tube, comprising:

• an FRP having an outside wall, an upper end, a lower end, and a groove on the inside wall around the inner circumference of the tube;
• and
• a bottom protruding into the groove, wherein the bottom is a piece of FRP molded in place so as to mechanically engage the tube where the bottom protrudes into the groove, the bottom having a hemispherical shape extending toward the upper end so that as pyrotechnics explode within the tube, the bottom is pressed into deeper engagement with the tube at the groove.