Effects of Canopy Geometry on the Infinite Mass Opening-Shock Factor of a Cross Parachute with a W/L Ratio of 0.264
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 (W/L) 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 31, 1973
- Accession Number
- AD0768755
Entities
People
- William P. Ludtke
Organizations
- Naval Ordnance Laboratory