Accession Number : AD0463362


Title :   AERODYNAMIC CHARACTERISTICS OF BALLUTES AND HEMISFLO PARACHUTES AT MACH NUMBERS OF 2.5, 2.6, AND 2.9


Corporate Author : ARO INC ARNOLD AFS TN


Personal Author(s) : Galigher, Lawrence L


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/463362.pdf


Report Date : May 1965


Pagination or Media Count : 28


Abstract : A test was conducted in the 16-ft supersonic tunnel to obtain drag, inflation, and stability characteristics of a metal ballute, a cloth ballute, and three hemisflo parachutes (5-, 10-, and 15-percent porosity). The cloth and metal ballutes were investigated at Mach numbers of 2.5 and 2.9, respectively, at a dynamic pressure of 120 psfa. The hemisflo parachutes were investigated at a Mach number of 2.6 at a dynamic pressure of 120 psfa. The drag coefficient of the hemisflo parachutes decreased as canopy porosity increased. There was no discernible effect of canopy porosity on stability of the parachutes.


Descriptors :   *DROGUE PARACHUTES , CONICAL BODIES , DECELERATION , DEPLOYMENT , DRAG , NYLON , OSCILLATION , POROSITY , STABILITY , SUPERSONIC FLOW


Subject Categories : Gliders and Parachutes


Distribution Statement : APPROVED FOR PUBLIC RELEASE