Accession Number:

AD0768755

Title:

Effects of Canopy Geometry on the Infinite Mass Opening-Shock Factor of a Cross Parachute with a W/L Ratio of 0.264

Descriptive Note:

Corporate Author:

NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s):

Report Date:

1973-07-31

Pagination or Media Count:

20.0

Abstract:

The effects of cloth permeability, number of suspension lines, and suspension line length on the infinite mass opening-shock factor of the cross parachute were investigated in a wind tunnel. Forty-inch-diameter models with a canopy arm-to-length ratio WL of 0.264 were deployed at wind-tunnel velocities of 150 or 200 miles per hour. Results of these tests indicate that cloth permeability influences the infinite mass shock factor significantly. A decrease in the cloth permeability results in an increase in the shock factor. Suspension line length and number of suspension lines do not appreciably affect the shock factor. The steady-state drag coefficients are affected by the cloth and suspension line parameters.

Subject Categories:

  • Gliders and Parachutes

Distribution Statement:

APPROVED FOR PUBLIC RELEASE