High-altitude flight test of a 40-foot-diameter (12.2-meter) ringsail parachute at a deployment Mach number of 2.95 /
by Clinton V. Eckstrom.
Description
- Language(s)
-
English
- Published
-
Washington, DC : National Aeronautics and Space Administration, 1970.
- Summary
-
A 40-foot-nominal-diameter (12.2-meter) modified ringsail parachute was flight tested as part of the NASA Supersonic High Altitude Parachute Experiment (SHAPE) program. The 41-pound (18.6-kg) test parachute system was deployed from a 239.5-pound (108.6-kg) instrumented payload by means of a deployment mortar when the payload was at a Mach number of 2.95 and a free-stream dynamic pressure of 9.2 lb/sq ft (440 N/m²). The parachute deployed properly with the canopy inflating to a near full open condition followed immediately by a partial collapse of the canopy and subsequent oscillations of the frontal area until the system had decelerated to a Mach number of about 1.5. The parachute then attained an inflated shape that provided full drag area. During the supersonic part of the test, the average axial-force coefficient C A ,₀ varied from a minimum of about 0.24 at a Mach number of 2.7 to a maximum of 0.54 at a Mach number of 1.1. During descent under subsonic conditions, the average effective drag coefficient was 0.62 and parachute-payload oscillation angles averaged about ±10⁰ with excursions to ±20⁰.--P. [i].
- Note
-
"L-1077."
"L-7002."
"NASA TN D-5796."
"June 1970."
Also available online in PDF and Quicktime movie format from NASA Technical Reports Server Web site.
- Physical Description
-
[i], 49 p. :
ill. ;
26 cm.
Viewability
| Item Link |
Original Source |
|
Full view
|
University of Illinois at Urbana-Champaign
|