Download or read book Development of a High Low Q Aircraft Recovery Parachute System written by Daniel J. Kolega and published by . This book was released on 1976 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: Various concepts were studied for providing a high/low q recovery parachute to recover aircraft in uncontrollable maneuvers at both high and low dynamic pressure. Fixed time delay skirt reefing was selected and a packing investigation was conducted to determine if it is possible to install such a parachute system in existing spin recovery parachute compartments. Finally, a wind tunnel test rogram was conducted to determine the feasibility of reefing spin recovery parachutes to extend their performance range. Throughout all tests a positive force held the chute outstretched in the wake of the spinning aircraft model demonstrating the feasibility of the reefing concept. The technology gained from this effort is applicable to most new aircraft systems (as the F-15, F-14, F-5, and lightweight fighters), and could permit more extensive and safer flight testing at high speed near stall conditions.

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 Development and Evaluation of a Parachute Recovery System for the B 1 Aircraft Flight Data Recorder written by Daniel J. Kolega and published by . This book was released on 1975 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evaluation of a contractor designed parachute recovery system for the B-1 Crash Data Recorder/Crash Position Indicator (CDR/CPI) resulted in a 45-inch diameter solid flat canopy design effort by the ASD Parachute Branch at Wright-Patterson AFB, Ohio. The recovery system performance was evaluated through a series of static deployment tests, low speed helicopter airdrop tests at Wright-Patterson AFB, and high speed deployment tests conducted at the Whirl Tower Facility located at the National Parachute Test Range, El Centro, California.

Download or read book Parachute Recovery Systems written by Theo W. Knacke and published by . This book was released on 1992 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this manual is to provide recovery system engineers in government and industry with tools to evaluate, analyze, select, and design parachute recovery systems. These systems range from simple, one-parachute assemblies to multiple-parachute systems, and may include equipment for impact attenuation, flotation, location, retrieval, and disposition. All system aspects are discussed, including the need for parachute recovery, the selection of the most suitable recovery system concept, concept analysis, parachute performance, force and stress analysis, material selection, parachute assembly and component design, and manufacturing. Experienced recovery system engineers will find this publication useful as a technical reference book; recent college graduates will find it useful as a textbook for learning about parachutes and parachute recovery systems; and technicians with extensive practical experience will find it useful as an engineering textbook that includes a chapter on parachute- related aerodynamics. In this manual, emphasis is placed on aiding government employees in evaluating and supervising the design and application of parachute systems. The parachute recovery system uses aerodynamic drag to decelerate people and equipment moving in air from a higher velocity to a lower velocity and to a safe landing. This lower velocity is known as rate of descent, landing velocity, or impact velocity, and is determined by the following requirements: (1) landing personnel uninjured and ready for action, (2) landing equipment and air vehicles undamaged and ready for use or refurbishment, and (3) impacting ordnance at a preselected angle and velocity.

Download or read book Recovery System Design Guide written by E. G. Ewing and published by . This book was released on 1978 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Development of a Three stage Parachute System for Low level Deployment Up to Mach 1 2 written by William B. Pepper and published by . This book was released on 1967 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design and development of a parachute system suitable for low-level release and high-velocity deployment are presented. Rocket-boosted field tests of the system along with theoretical trajectory studies indicate that the retardation system can successfully recover a 1300-pound test vehicle released from an aircraft flying at Mach 1.2 and 150 feet above the terrain.

Download or read book Research and Development of Parachute Recovery System for Pilotless Aircraft written by Otto C. Winzen and published by . This book was released on 1947 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Low Altitude High Speed Cargo Parachute System Development written by W. D. Sundberg and published by . This book was released on 1991 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Low Altitude High Speed Cargo (LAHSC) parachute is being developed for deployment at velocities up to 250 knots at 300 ft altitude. The LAHSC parachute will decelerate and turnover a load to a 40 to 60 ft/sec vertical velocity at first vertical at approximately 30 ft AGL. The acceleration limit is 5g's. Main chute cargo extraction will be necessary. A single parachute will be utilized for a 7500 lb load, and clusters will be used for larger loads. The 64-gore, 70-ft-dia parachute has a ring-slot/solid construction with a flare at the skirt to aid the inflation. This paper describes the parachute, the design process and testing to date. Model parachutes have been tested in wind tunnels and in free flight. A single full-scale parachute has been tested at low speeds with conventional load extraction, and with a vertical trajectory at deployment.

Download or read book Fiscal Year 1975 Authorization for Military Procurement Research and Development and Active Duty Selected Reserve and Civilian Personnel Strengths written by United States. Congress. Senate. Committee on Armed Services and published by . This book was released on 1974 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Performance of a Parachute for the Recovery of a 760 lb Payload written by and published by . This book was released on 1991 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: A 26-ft-diameter ribbon parachute deployed using a pilot parachute system has been developed at Sandia National Laboratories for the recovery of a 760-lb payload released at subsonic and transonic speeds. The wide range of deployment dynamic pressures led to the design, utilizing wind tunnel testing and computer simulation, of a unique pilot parachute system verified in full-scale flight tests. Performance data from 20 full-scale flight tests were used to evaluate system performance and structural validity. The concical ribbon parachute design chosen for this development effort follows the practice of previous Sandia National Laboratory parachute development programs for high performance airdropped payloads. The design process for this parachute system included a tradeoff study to evaluate and compare the performance between an equivalent drag area 26-foot-diameter single parachute system and a cluster system of three 14-ft-diameter parachutes. The results showed a small advantage for the cluster system in inflation and initial deceleration characteristics. However, the higher cost, higher weight, greater packing complexity and greater risk involved in the development of the cluster system outweighed the performance advantages and led to the choice of the 26-ft-diameter parachute as the baseline design for the development. This paper describes the design and performance of the 26-ft-diameter parachute which was chosen for the recovery of a 760-lb payload. The results of 20 full-scale flight test of this parachute system are summarized. 8 refs., 13 figs., 2 tabs.

Download or read book Government Reports Annual Index written by and published by . This book was released on 1991 with total page 1188 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recovery Systems for Missiles and Target Aircraft written by Dr. J. R. Downing and published by . This book was released on 1954 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: The characteristics of Guide Surface, Ribbon and Rotafoil parachutes operated in the speed ranges up to 500 miles per hour are described. These characteristics were determined by means of two tests conducted with rocket powered test vehicles operated on the Free Air Test Facility Track at Edwards Air Force Base. The various parachutes tested are intended for use as parabrakes to decelerated high velocity missiles to relatively low speeds at which large parachutes can be satisfactorily deployed to accomplish safe recovery. All test parachutes were designed to have drag areas of approximtely 28 ft2 and factors of safety of 1.5 at 400 miles per hour. The data obtained during this test program included inflation times, opening shock factors, drag forces and inflated diameters of the test parachutes at various deployment speeds. These data are used to provide design information about drag coefficients, critical opening speeds, porosities, and strength requirements for these parachutes.

Download or read book Further Development and Flight Test of an Autonomous Precision Landing System Using a Parafoil written by James E. Murray and published by . This book was released on 1994 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1991 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ELEVATION OF RECOVERY PARACHUTE LOW ALTITUDE AIRDROP OF EXPLORATORY DEVELOPMENT written by and published by . This book was released on 1966 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report discusses the approaches pursued, and the results and conclusions reached, during the preliminary study conducted to investigate the feasibility of elevating the main recovery parachutes above the flight path of an airdrop aircraft by means of auxiliary lifting parachutes. Preliminary analytical studies and experimental tests were conducted during the evaluation period. The overall objective was to determine the technical, operational, and economic feasibility of elevating the main recovery parachute to achieve a low- altitude airdrop capability of 500 ft (absolute) altitude or less, as a basis for determining if further 'in-depth' study were warranted. The results indicate that the elevation of recovery parachutes by auxiliary lifting parachutes is not feasible.

Download or read book Development of a Low Altitude Tactical Assult Parachute written by John Watkins and published by . This book was released on 1989 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The US Army is conducting exploratory development of troop parachute concepts which will have better performance than the T-10 troop parachute currently used. The major performance goals are a slower rate of descent and a lower jump altitude. The initial concepts were a two canopy cluster parachute system and a large single canopy parachute system. Both systems met or exceeded the rate of descent goal. The two parachute cluster came the closest to meeting the jump altitude goal, but questions about reliability along with operational and logistical considerations raised concerns about the suitability of this concept. Further work was done to reduce jump altitude for a single canopy system. Concepts that were investigated included a drogue extraction technique and a reefing method to make the canopy inflate faster. The drogue extraction technique did reduce the altitude loss, but this method is impractical when a large number of soldiers must exit the aircraft in a short time. The reefing technique was successful in reducing the altitude loss to full canopy inflation, but this reduction by itself was not enough to meet the jump altitude goals, and the peak opening forces increased to uacceptable [sic] levels. At the present time, additional improvements are sought in other areas which include; faster acting equipment releases and faster canopy stabilization.

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 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: