Download or read book A Study of Air Cushion Landing Systems for Recovery of Unmanned Aircraft written by John M. Ryken and published by . This book was released on 1972 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents results of a concept feasibility and formulation study of Air Cushion Landing Systems for recovery of unmanned aircraft (Remotely Piloted Vehicles). A modified Ryan Model 147G drone or special purpose aircraft was investigated for possible use in a low cost flight test demonstration of air cushion landing gear concepts on an existing unmanned aircraft. Recovery by horizontal landing on an air cushion landing system is compared with recovery with a mid-air recovery system. (Author).
Download or read book Conceptual Design of an Air Cushion Landing System for an Unmanned Aircraft written by Henry B. McCudden and published by . This book was released on 1973 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problems associated with existing recovery systems include difficulty in mid-air retrieval of RPV's in excess of 1500 lbs; high operations and support costs of parachutes, recovery helicopters, other aircraft and their crews; long recycle time; paving quality requirements for wheeled or skid type landing gear; and frequent damage of RPV's recovered by parachute/attenuation bag or parachute/mid-air recovery systems. Accordingly, this preliminary design study report describes an air cushion landing system (ACLS) applied to the 3,000 lb Jindivik Mk 3A unmanned aircraft. The ACLS is stowed for cruise flight in a clean aerodynamic fairing on the underfuselage, resulting in a minimum performance degradation. For recovery, hinged clam-shell type doors are unlatched, and open, permitting inflation/deployment of an inelastic type elongated toroid-shaped trunk. The trunk is inflated and blown with bleed air tapped off an existing port on the Jindivik's Viper Mk 201 engine. After landing, the aircraft is placed on a fixture and the trunk is manually restowed in the fairing. (Modified author abstract).
Download or read book Air Cushion Landing Systems written by Hrishikesh Saha and published by . This book was released on 1973 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Air Cushion Landing Systems written by and published by . This book was released on 1972 with total page 870 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Air Cushion Landing Systems written by Hrishikesh Saha and published by . This book was released on 1973 with total page 874 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Integration of Air Cushion Landing System Technology Into the Jindivik Remotely Piloted Vehicle written by A. J. P. Lloyd and published by . This book was released on 1978 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies have been conducted on an Air Cushion Landing System for the Australian Jindivik target drone aircraft. Analyses are presented of the airflow and yaw thruster control systems, and the vehicle stability with a deployed recovery trunk is assessed. The vehicle touchdown and slideout on a recovery trunk are presented, and the design of an improved retention/release system is shown. (Author).
Download or read book Heave pitch roll Analysis and Testing of Air Cushion Landing Systems written by Ashok B. Boghani and published by . This book was released on 1978 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Landing impact Studies of a 0 3 scale Model Air Cushion Landing System for a Navy Fighter Airplane written by Trafford J. W. Leland and published by . This book was released on 1975 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study was conducted in order to determine the landing-impact behavior of a 0.3-scale, dynamically (but not physically) similar model of a high-density Navy fighter equipped with an air cushion landing system. The model was tested over a range of landing contact attitudes at high forward speeds and sink rates on a specialized test fixture at the Langley aircraft landing loads and traction facility. The investigation indicated that vertical acceleration at landing impact was highly dependent on the pitch angle at ground contact, the higher acceleration of approximately 5g occurring near zero body-pitch attitude. A limited number of low-speed taxi tests were made in order to determine model stability characteristics. The model was found to have good pitch-damping characteristics but stability in roll was marginal.
Download or read book Heave pitch roll Analysis and Testing of Air Cushion Landing Systems written by A. B. Boghani and published by . This book was released on 1978 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Analysis of the Stability of an Aircraft Equipped with an Air Cushion Recovery System written by Max Allen Stafford and published by . This book was released on 1978 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: The stability of an aircraft equipped with an air cushion recovery system (ACRS) was investigated both in-flight and during the landing (slideout) phase of flight. Digital computer simulations were used to identify unstable tendencies of a specific aircraft (the Jindivik drone). Control system designs are proposed to eliminate the instabilities. A nonlinear, six degree of freedom, aerodynamic model is developed based on available wind-tunnel data. The model is used in a computer software package, EASY, to simulate the vehicle in flight. A model of the air cushion recovery system is also developed. The model is generated by matching experimental data obtained from an actual ACRS with 14 spring/damper units. the model is verified by computer simulation, and the slideout simulations are performed. These simulations reveal a lateral-directional instability in the slideout. An optimal control design is proposed and verified, after which it is shown that the stability of the system is dramatically exhanced by the addition of an optimal controller.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Air Cushion Landing Gear Applications Study written by and published by . This book was released on 1979 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1983 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Contractor Report written by and published by . This book was released on 1979 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theory of an Air Cushion Landing System for Aircraft written by Kennerly H. Digges and published by . This book was released on 1970 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Air Cushion Landing System is a scheme to replace the wheeled landing gear on aircraft by a peripheral jet air cushion. The concept employs a flexible elastic membrane or 'trunk' which is attached to the bottom of the aircraft fuselage. During flight, the trunk shrinks elastically and hugs the bottom of the fuselage like a de-icing boot. When a flow of air is applied to the inside of the trunk, the elastic material stretches and forms an elongated doughnut-shaped protrusion on the underside of the aircraft. The air flow is ducted by the trunk to the fuselage periphery and exhausted through a large number of holes or slots. As a result, a pressure builds up under the aircraft when the ground is approached. The pressure is sufficient to support the aircraft and absorb its vertical landing velocity. The study develops analytical relationships between the variables associated with the Air Cushion Landing System. Included are the following: The derivation of a theory which predicts the static characteristics of the system; Analytical methods for predicting flow, jet height and power requirements; Curves which illustrate the interrelationships among the design variables; Computer programs for predicting the cross-sectional area and shape of the elastic trunk; The development and test of an analytical model which predicts the dynamic response of the system to landing impact; A discussion of the design considerations for the system.
Download or read book Landing Performance of an Air cushion Landing System Installed on a 1 10 scale Dynamic Model of the C 8 Buffalo Airplane written by William Crawford Thompson and published by . This book was released on 1973 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental and Analytical Studies of Advanced Air Cushion Landing Systems written by and published by . This book was released on 1981 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
