초록 ▼

An improved cruciform or cross parachute, especially for personnel use, is disclosed. The central section and canopy arms are made from a zero or near zero porosity fabric, and air from underneath the canopy is vented as air venting jets through generally horizontal openings in each of the four late

An improved cruciform or cross parachute, especially for personnel use, is disclosed. The central section and canopy arms are made from a zero or near zero porosity fabric, and air from underneath the canopy is vented as air venting jets through generally horizontal openings in each of the four lateral arms of the canopy. The generally horizontal openings are centrally located in the upper half of the lateral arms, preferably spaced inwardly 20% of the arm width from the arm edges and preferably at a transition point in the upper part of the arm where a tangent line intersecting the arm surface is approximately 45.degree. from the vertical axis of the parachute. Also, preferably, the opening is formed by horizontal slits. The central section can be made from the standard square crown configuration or, alternatively, effectively enlarged by removing small triangular sections at each of the four corners of the otherwise square crown. The lateral arms have a relative short length, preferably less than 75% of the crown width. The suspension lines are also relatively short, preferably, 40%-70% of the canopy cross panel length. The canopy central section and lateral arms, and the air vent jet opening leading edges, are all reinforced using conventional reinforcing tapes.

대표청구항 ▼

[ What is claimed is as follows:] [1.] A canopy for a cruciform parachute comprising a generally square central section and four lateral arms attached thereto and extending therefrom; said central section and said arms both made from a zero or near zero porosity fabric and said arms having a length

[ What is claimed is as follows:] [1.] A canopy for a cruciform parachute comprising a generally square central section and four lateral arms attached thereto and extending therefrom; said central section and said arms both made from a zero or near zero porosity fabric and said arms having a length less than 75% of the width of the generally square central section; said arms each having an unobstructed opening in the upper portion thereof inwardly of its edges for venting air outwardly and downwardly from underneath said canopy.