Download or read book Aerodynamic Characteristics of Parachutes at Mach Numbers from 1 6 to 3 written by Julian D. Maynard and published by . This book was released on 1961 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aerodynamic Characteristics of Parachutes at Mach Numbers from 1 6 to 3 written by Julian D. Maynard and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wind-tunnel investigation was conducted to determine the parameters affecting the aerodynamic performance of drogue parachutes in the Mach number range from 1.6 to 3. Flow studies of both rigid- and flexible-parachute models were made by means of high-speed schlieren motion pictures and drag coefficients of the flexible-parachute models were measured at simulated altitudes from about 50,000 to 120,000 feet. Porosity and Mach number were found to be the most important factors influencing the drag and stability of flexible porous parachutes. Such parachutes have a limited range of stable operation at supersonic speeds, except for those with very high porosities, but the drag coefficient decreases rapidly with increasing porosity. (Author).

Download or read book Aerodynamic Characteristics of Various Types of Full Scale Parachutes at Mach Numbers from 1 8 to 3 0 written by J. F. Lowry and published by . This book was released on 1964 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: As an extension of studies previously completed in the von Karman Gas Dynamics Facility, a test was conducted in the Propulsion Wind Tunnel, Supersonic (16S), to determine the effect of Mach number on the drag, stability, and inflation characteristics of four types of parachutes. The parachute characteristics were investigated at Mach numbers from 1.8 to 3.0 at pressure altitudes from 75,000 to 104,000 ft. Hyperflo parachutes were tested with 14 different roof configurations, hemisflo and conical parachutes with two different shroud line lengths and a butted skirt. A supersonic-guide-surface parachute was tested at various parachute-centerbody separation distances. (Author).

Download or read book Aerodynamic Characteristics of Ballutes and Disk Gap Band Parachutes at Mach Numbers from 1 8 to 3 7 written by and published by . This book was released on 1969 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: A test was conducted in a supersonic wind tunnel, to determine deployment characteristics and aerodynamic performance of disk-gap-band parachutes of various geometric porosities and ballutes with various ram-air inlet configurations. Deployments were made from a reentry-type model at nominal free-stream Mach numbers from 2.0 to 3.7 at a nominal free-stream dynamic pressure of 70 psf.

Download or read book Aerodynamic Characteristics of Supersonic X Parachutes at Mach Numbers of 2 1 and 4 0 written by Lawrence L. Galigher and published by . This book was released on 1969 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: A test was conducted in a supersonic propulsion wind tunnel to determine deployment characteristics and aerodynamic performance of Supersonic X parachutes having geometric porosities of 13.4, 26.0, and 59.2 percent. Deployments were made from a cylindrical forebody having a flared aft section at free-stream Mach numbers of 2.1 and 4.0 at a nominal free-stream dynamic pressure of 80 psf. No data were obtained at Mach numbers other than the deployment Mach numbers. (Author).

Download or read book Symposium on Parachute Technology and Evaluation written by Earl C. Myers and published by . This book was released on 1964 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Index to NASA Technical Publications written by United States. National Aeronautics and Space Administration and published by . This book was released on 1960-07 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Technical Note written by and published by . This book was released on 1972 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Technical Report written by United States. National Aeronautics and Space Administration and published by . This book was released on 1974 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book AERODYNAMIC CHARACTERISTICS OF BALLUTES AND HEMISFLO PARACHUTES AT MACH NUMBERS OF 2 5 2 6 AND 2 9 written by and published by . This book was released on 1965 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Aerodynamic Characteristics of an Ejection Seat Escape System with a Stabilization Parachute at Mach Numbers from 0 3 Through 1 2 written by David E. A. Reichenau and published by . This book was released on 1972 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: A test was conducted in the 16-ft Transonic Wind Tunnel of the Propulsion Wind Tunnel Facility to determine the aerodynamic characteristics of a 0.5-scale ejection seat escape system and to determine the stability effects of a stabilization parachute attached to the back of the ejection seat model. The results were obtained for both simulated rocket-off and rocket-on conditions through a model angle-of-attack range from 0 to 30 deg and an angle-of-yaw range from 0 to 15 deg. High-pressure air was used to simulate the escape rocket jet plume at a sea-level altitude. Over the test range of this investigation, the results show that the ejection seat model was statically unstable but became longitudinally and directionally stable with the parachute using the three- and four-point bridle assemblies. Jet simulation and model yaw angle had little effect on the ejection seat longitudinal stability; however, jet simulation increased the parachute drag coefficient. (Author).

Download or read book Aerodynamic Performance of Various Hyperflo and Hemisflo Parachutes at Mach Numbers from 1 8 to 3 0 written by David E. A. Reichenau and published by . This book was released on 1965 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: As an extension of studies previously completed, a test was conducted in the Propulsion Wind Tunnel, Supersonic (16S), to determine the effect of Mach number on the drag, stability, and inflation characteristics of a number of parachutes. The parachute characteristics were investigated at Mach numbers from 1.8 to 3.0 at pressure altitudes from 82,000 to 104,000 ft. Two general types of parachutes were tested: the hyperflo-type parachute using three general design concepts with porosities from 7.0 to 10.9 percent and the hemisflo-type parachute with and without reefing. Data obtained indicated that the hyperflo parachutes had good inflation characteristics at Mach number 2.6 and the drag decreased with increasing Mach number. The hemisflo parachutes had good inflation characteristics in the 1.8 to 2.2 Mach number range. For any given configuration, the stability was found to be essentially constant with varying Mach number. (Author).

Download or read book Aerodynamic Characteristics of Disk Gap Band Parachutes in the Wake of Viking Entry Forebodies at Mach Numbers from 0 2 to 2 6 written by David E. A. Reichenau and published by . This book was released on 1972 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests were conducted in wind tunnels to determine the drag and performance characteristics of various disk-gap-band parachute configurations in the wake of a 0.10-scale Viking entry vehicle. The parachutes were also tested behind a small faired body to obtain minimum interference parachute performance characteristics. Increasing the parachute trailing distance and suspension line length increased the parachute drag coefficient at each Mach number.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Flexible Parachute Model Characteristics at Mach Numbers from 1 5 to 6 u written by J. S. Deltering and published by . This book was released on 1962 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests were conducted in the 40-in. Supersonic Tunnel (A) of the von Kármám Gas Dynamics Facility to determine the stability and drag characteristics of a series of fabric parachutes over the Mach number range of 1.5 to 6. Various parachute designs employing porous and ribbon materials were tested at dynamic pressures corresponding to altitudes of approximately 63,000 ft to 143,000 ft for the above Mach number range, respectively. Drag modulation by reefing was successfully attempted on one parachute configuration at Mach numbers 1.5 to 3. Another configuration was tested for strength of construction at a higher pressure level corresponding to an altitude of 109,000 ft at Mach 6. The data obtained in these tests consisted of high-speed movies, both sideview and schlieren, and oscillograph drag trace.

Download or read book Drag Characteristics of a Disk gap band Parachute with a Nominal Diameter of 1 65 Meters at Mach Numbers from 2 0 to 3 0 written by Robert J. Mayhue and published by . This book was released on 1972 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supersonic wind-tunnel tests were conducted with disk-gap-band parachute models having a nominal diameter of 1.65 meters and geometric porosities of 10.0, 12.5, and 15.0 percent. Canopy inflation characteristics, angles of attack, and drag performance are presented for deployment behind forebody base extensions which were free to oscillate in pitch and yaw. The effect of increasing suspension-line length on canopy motions and drag performance is included, and the drag performance of a model with 12.5 percent geometric porosity is compared with results from flight tests of a parachute with a nominal diameter of 12.19 meters.