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Author : Robert O. Schade
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (31 download)
Download or read book Ground Interference Effects written by Robert O. Schade and published by . This book was released on 1961 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert O. Schade
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (689 download)
Download or read book Ground Interference Effects written by Robert O. Schade and published by . This book was released on 1961 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study has been made to determine the basic phenomena associated with the ground interference effects for VTOL aircraft in an attempt to arrive at some generalized conclusions regarding the effect of the ground on the various types of VTOL aircraft. The results showed that helicopter and other rotor aircraft generally experience favorable ground effect. In the case of propeller VTOL aircraft the tilt-wing configurations will usually experience a small favorable ground effect. For the deflected-slipstream configurations a large detrimental ground effect is experienced at low angles of the thrust axis but little or no ground effect is experienced at angles of 25 degrees or 30 degrees. For buried-fan and jet configurations the ground effect can be favorable or unfavorable depending upon the geometry of the fans or jets and the airframe. For single-jet configurations the ground effects are detrimental and cannot be eliminated by fixes on the airplane. For these cases, a perforated landing platform appears to offer promise as a means of minimizing the adverse ground effect. Ground effects experienced in hovering flight tend to decrease with increasing forward speed and are rather small at airspeeds that might be of interest for STOL operation of the various VTOL configurations. The qualitative predictions of the ground effect for various VTOL aircraft configurations can be made with a fair degree of confidence, but it appears at the present time that the magnitude of the effect for specific configurations will usually have to be obtained from test data.
Author : D. Phillip Ankeney
Publisher :
ISBN 13 :
Total Pages : 62 pages
Book Rating : 4.3/5 (91 download)
Download or read book Comparison of Experimental and Theoretical Pressure Distribution Caused by Ground Interference Effects on Horizontal-wedge Test-track Sleds written by D. Phillip Ankeney and published by . This book was released on 1960 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Raymond D. Vogler
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.:/5 (31 download)
Download or read book Interference Effects of Single and Multiple Round Or Slotted Jets on a VTOL Model in Transition written by Raymond D. Vogler and published by . This book was released on 1964 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 406 pages
Book Rating : 4.:/5 (319 download)
Download or read book NASA Technical Note written by and published by . This book was released on 1973 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Brian Mellon
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (31 download)
Download or read book Ground and Interference Effects on the Aerodynamic Characteristics of Bodies written by Brian Mellon and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 34 pages
Book Rating : 4.:/5 (317 download)
Download or read book Propulsion-induced Effects Caused by Out-of-ground Effects written by and published by . This book was released on 1987 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Raymond D. Vogler
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.:/5 (31 download)
Download or read book Ground-effects Investigation of a STOL Air- Sea Transport Model with Blowing Over the Canard and Wing Flaps written by Raymond D. Vogler and published by . This book was released on 1970 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ground effects investigation of STOL air-sea transport model with blowing over canard and wing flaps.
Author : Elya B. Joffe
Publisher : John Wiley & Sons
ISBN 13 : 1118211510
Total Pages : 827 pages
Book Rating : 4.1/5 (182 download)
Download or read book Grounds for Grounding written by Elya B. Joffe and published by John Wiley & Sons. This book was released on 2011-09-20 with total page 827 pages. Available in PDF, EPUB and Kindle. Book excerpt: GROUNDS FOR GROUNDING The first book to cover grounding from the circuit to system and across the entire spectrum of applications Grounds for Grounding provides a complete and thorough approach to the subject of designing electrical and electronic circuits and systems, blending theory and practice to demonstrate how a few basic rules can be applied across a broad range of applications. The authors begin with the basic concepts of Electromagnetic Compatibility (EMC) that are essential for understanding grounding theory and its applications, such as “ground loop,” which is one of the most misunderstood concepts in EMC. Next, they provide an introduction to grounding, including safety grounding, grounding for control of electromagnetic interference, and grounding-related case studies. Subsequent chapter coverage includes: Fundamentals of grounding design Bonding principles Grounding for power distribution and lightning protection systems Grounding in wiring circuits and cable shields Grounding of EMI terminal protection devices Grounding on printed circuit boards Integrated facility and platform grounding system Practical case studies are integrated throughout the book to aid in readers’ comprehension and each chapter concludes with a useful bibliography. Grounds for Grounding is an indispensable resource for electrical and electronic engineers who work with the design of circuits, systems, and facilities.
Author : Harry H. Heyson
Publisher :
ISBN 13 :
Total Pages : 226 pages
Book Rating : 4.X/5 (1 download)
Download or read book Tables of Interference Factors for Use in Wind-tunnel and Ground-effect Calculations for VTOL-STOL Aircraft written by Harry H. Heyson and published by . This book was released on 1962 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Michael H. Kristy
Publisher :
ISBN 13 :
Total Pages : 80 pages
Book Rating : 4.:/5 (64 download)
Download or read book Strut and Wall Interference on Jet-induced Ground Effects of a STOVL Aircraft in Hover written by Michael H. Kristy and published by . This book was released on 1995 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: A small scale ground effect test rig was used to study the ground plane flow field generated by a STOVL aircraft in hover. The objective of the research was to support NASA-Ames Research Center planning for the Large Scale Powered Model (LSPM) test for the ARPA-sponsored ASTOVL program. Specifically, small scale oil flow visualization studies were conducted to make a relative assessment of the aerodynamic interference of a proposed strut configuration and a wall configuration on the ground plane stagnation line. A simplified flat plate model representative of a generic jet-powered STOVL aircraft was used to simulate the LSPM. Cold air jets were used to simulate both the lift fan and the twin rear engines. Nozzle Pressure Ratios were used that closely represented those used on the LSPM tests. The flow visualization data clearly identified a shift in the stagnation line location for both the strut and the wall configuration. Considering the experimental uncertainty, it was concluded that either the strut configuration or the wall configuration caused only a minor aerodynamic interference. Distribution.
Author :
Publisher :
ISBN 13 :
Total Pages : 284 pages
Book Rating : 4.:/5 (3 download)
Download or read book NASA Technical Report written by and published by . This book was released on 1962 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 776 pages
Book Rating : 4.:/5 (26 download)
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1971 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Enders A. Robinson
Publisher : SEG Books
ISBN 13 : 1560801484
Total Pages : 449 pages
Book Rating : 4.5/5 (68 download)
Download or read book Digital Imaging and Deconvolution written by Enders A. Robinson and published by SEG Books. This book was released on 2008 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering ideas and methods while concentrating on fundamentals, this book includes wave motion; digital imaging; digital filtering; visualization aspects of the seismic reflection method; sampling theory; the frequency spectrum; synthetic seismograms; wavelet processing; deconvolution; seismic attributes; phase rotation; and seismic attenuation.
Author :
Publisher :
ISBN 13 :
Total Pages : 1878 pages
Book Rating : 4.3/5 (121 download)
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1961 with total page 1878 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. Gordon Leishman
Publisher : Cambridge University Press
ISBN 13 : 9780521523967
Total Pages : 544 pages
Book Rating : 4.5/5 (239 download)
Download or read book Principles of Helicopter Aerodynamics written by J. Gordon Leishman and published by Cambridge University Press. This book was released on 2002-12-23 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Helicopters are highly capable and useful rotating-wing aircraft with roles that encompass a variety of civilian and military applications. Their usefulness lies in their unique ability to take off and land vertically, to hover stationary relative to the ground, and to fly forward, backward, or sideways. These unique flying qualities, however, come at a high cost including complex aerodynamic problems, significant vibrations, high levels of noise, and relatively large power requirements compared to fixed-wing aircraft. This book, written by an internationally recognized expert, provides a thorough, modern treatment of the aerodynamic principles of helicopters and other rotating-wing vertical lift aircraft. Every chapter is extensively illustrated and concludes with a bibliography and homework problems. Advanced undergraduate and graduate students, practising engineers, and researchers will welcome this thorough and up-to-date text on rotating-wing aerodynamics.
Author : Keith Attenborough
Publisher : CRC Press
ISBN 13 : 042989483X
Total Pages : 690 pages
Book Rating : 4.4/5 (298 download)
Download or read book Predicting Outdoor Sound written by Keith Attenborough and published by CRC Press. This book was released on 2021-03-07 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of Predicting Outdoor Sound is an up-to-date reference on the propagation of sound close to the ground and its prediction. New content includes comparisons between predictions and data for road traffic, railway and wind turbine noise; descriptions of source characteristics in the HARMONOISE model; propagation over rough seas, parallel low walls, and lattices; outlines of numerical methods; gabion (caged stones) and sonic crystal noise barriers; meteorological effects on noise barrier performance; and the prediction requirements for auralization. The book brings together relevant theories, prediction schemes, and data, thereby providing a basis for determining what model or scheme might be applicable for any situation. It also offers a background on useful analytical approximations and the restrictions, as well as difficulties and limitations associated with engineering prediction schemes. The text should be of considerable interest to researchers in outdoor sound propagation and, more generally, it should provide a comprehensive primer on the topic for lecturers, consultants and students in acoustics and noise control.
