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Advanced Ejection Seat for High Dynamic Pressure Escape Wind Tunnel Test Report
Wind tunnel tests were conducted to evaluate new high dynamic pressure protective devices incorporated into a conventional ejection seat. These tests are part of a development program 'Advanced Ejection Seat for High Dynamic Pressure Escape'. The objectives of this program are to develop an ejection seat design which will provide safe escape during emergency conditions encountered throughout the performance envelope of an aircraft with speed capability to 687 KEAS. Preliminary phases of this program have resulted in selection and definition of a windblast-shield, an aft body drag reduction boom, a horizontal stabilizer and a flow diverter. These devices were incorporated into a one-half scale ejection seat/crewmember model and were tested in the AEDC PWT 16-T transonic tunnel. Aerodynamic data derived from these tests are being used in six-degree-of-freedom computer simulations for performance assessments of the ejection seat configurations. (Author)
Wind Tunnel Measurements of Total Force and Extremity Flail Potential Forces on a Crew Member in Close Proximity to a Cockpit
In order to determine the aerodynamic forces acting upon a crew member/escape seat combination at transonic speeds, and the flail potential forces acting on the crewmember's extremities, an existing half scale man/seat combination was integrated with a model of the forward portion of the F-16. The combination was tested in the Arnold Engineering Development Center Propulsion Wind Tunnel (PWT) Facility Transonic Wind Tunnel (16T) during the period September 9 to September 15, 1978, over the Mach number range 0.4 to 1.2. The basic data obtained in this way are reported in Reichenau. The present report describes the experimental set-up in detail and presents some typical force and force area (f...
Design News
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Welt-Adressenbuch
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Illuminating the Middle Ages
The twenty-eight essays in this collection showcase cutting-edge research in manuscript studies, encompassing material from late antiquity to the Renaissance. The volume celebrates the exceptional contribution of John Lowden to the study of medieval books. The authors explore some of the themes and questions raised in John’s work, tackling issues of meaning, making, patronage, the book as an object, relationships between text and image, and the transmission of ideas. They combine John’s commitment to the close scrutiny of manuscripts with an interrogation of what the books meant in their own time and what they mean to us now.
Ottonian Imperial Art and Portraiture
Ottonian Imperial Art and Portraiture represents the first art historical consideration of the patronage of the Ottonian Emperors Otto III (983-1002) and Henry II (1002-1024). Author Eliza Garrison analyzes liturgical artworks created for both rulers with the larger goal of addressing the ways in which individual art objects and the collections to which they belonged were perceived as elements of a material historical narrative and as portraits. Since these objects and images had the capacity to stand in for the ruler in his physical absence, she argues, they also performed political functions that were bound to their ritualized use in the liturgy not only during the ruler's lifetime, but even after his death. Garrison investigates how treasury objects could relay officially sanctioned information in a manner that texts alone could not, offering the first full length exploration of this central phenomenon of the Ottonian era.
Examining Evolutionary Trends in Equus and its Close Relatives from Five Continents
Evolution of the horse has been an often-cited primary example of evolution, as well as one of the classic and important stories in paleontology for over a century and a half, due to their rich fossil record across 5 continents: North America, South America, Europe, Asia and Africa. The recent horse has served a profound role in human ancestry, including agriculture, commerce, sport, transport, warfare, and in prehistory, for the subsistence of humans. Many studies have examined the evolution of the Equidae and chronicled the striking changes in skulls, dentition, limbs, and body size which have long been perceived to be a response to environmental shifts through time. Most comprehensive stu...
