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## Deployment and Inflation Characteristics 

Main canopies have changed dramatically over the last several years and, consequently, different opening problems have emerged. Some canopies are inherently hard openers, while others are inherently slow openers. Accuracy canopies, with their thick airfoils and large overhanging topskins, fall into the first category, while thinner airfoils, with flatter trim and baffled leading edges, tend to fall into the latter. 

One of the most common problems encountered is that of hard openings. Line strip or line dump is the leading cause of hard openings. This occurs when inadequately-stowed lines come off of the bag all at once instead of releasing one line bight at a time in an orderly fashion, and subsequently the canopy is allowed to inflate prior to line stretch resulting in sometimes an explosive opening. Securing the lines so that it takes approximately 12 pounds of force to release each bight is accomplished with a proper stow band and balancing the weight and mass of the lines by placing 50 percent of the line weight and mass on the mid-section of the bag and 25 percent of the weight and mass on each side of the bag. This alleviates the problem of line strip. 

