IMPROVEMENTS IN OR RELATING TO PARACHUTES

摘要

A parachute canopy is shaped so that the internal surface of the inflated canopy is concave near the peripheral hem and is convex nearer the apex of the canopy, vents being provided in the canopy to relieve the circumferential tensions generated within the canopy, which vents are covered by flaps which close the vents, wholly or in part, when the excess pressures have been relieved. The vents can be covered by extensible netting or flaps can have control cords operating by the movements of the canopy fabric or controlled manually by the parachutist.