Accession Number:

AD0862973

Title:

Drag and Performance Characteristics of Several Flexible Aerodynamic Decelerators at Mach Numbers From 1.5 to 6.0

Descriptive Note:

Final rept.

Corporate Author:

ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN

Personal Author(s):

Report Date:

1969-12-01

Pagination or Media Count:

31.0

Abstract:

An experimental investigation was conducted at Mach numbers from 1.5 to 6.0 to determine the drag and stability characteristics of several flexible aerodynamic decelerators located in the wake of double-strut-mounted forebodies. Data are presented which show a decrease in drag with an increase in free-stream Mach number andor a decrease in drag for both guide surface decelerators and for a ballute. Because of differences in calibration techniques, riser line length, and test equipment, a 50- to 70-percent lower value of drag coefficient was obtained on a series of supersonic X decelerators when compared to previous tests. The present data do, however, agree reasonably well with drag data for a full-scale decelerator. An indication of the parachute stability is given in tabular form. All of the present data were obtained at a free-stream dynamic pressure of 1.0 psia and static pressures corresponding to pressure altitudes ranging from 70,000 to 130,000 ft.

Subject Categories:

  • Lighter-than-air Aircraft
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE