Crash bag

A crash bag, comprising:

• an impact structure having a first bag wall at least partially defining a first bag air chamber that has a first bag air chamber inlet for receiving pressurized air, and a first bag air chamber operating pressure;
• and
• a first outlet valve that includes
• a first peripheral valve wall defining a first valve inlet that is in fluid communication with the first bag air chamber, and wherein the first peripheral valve wall further defines a first valve outlet, and wherein the first peripheral valve wall is flexible and has an inner face that defines a passage through the first outlet valve between the first valve inlet and the first valve outlet, wherein the first peripheral valve wall has an outer face that is in a first valve air chamber having a first valve air chamber operating pressure,
• wherein the first outlet valve has a first outlet valve axis extending between the first valve inlet and the first valve outlet, and wherein the first peripheral valve wall includes a plurality of first peripheral valve wall panels each having a first side edge and a second side edge both of which extend generally axially, wherein the first outlet valve includes a plurality of seams, wherein the first side edge from each of the plurality of first peripheral valve wall panels is joined to the second side edge of an adjacent one of the first peripheral valve wall panels by a seam from the plurality of seams,
• wherein at least one of the plurality of seams is at least one slope-change seam, wherein the first outlet valve has a transverse plane that is orthogonal to the first outlet valve axis, and wherein the first peripheral valve wall has a slope in the transverse plane, wherein the slope changes by more at the at least one slope-change seam than the slope changes along a portion of the first peripheral valve wall extending between the at least one slope-change seam and a subsequent one of the plurality of seams.