Effect Of Ground Proximity On The Aerodynamic Characteristics Of Aspect Ratio 1 Airfoils With And Without End Plates
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Effect of Ground Proximity on the Aerodynamic Characteristics of Aspect ratio 1 Airfoils with and Without End Plates
Author | : Arthur W. Carter |
Publsiher | : Unknown |
Total Pages | : 32 |
Release | : 1961 |
Genre | : Ground-cushion phenomenon |
ISBN | : UIUC:30112106915124 |
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An investigation has been made to determine the effect of ground proximity on the aerodynamic characteristics of aspect-ratio-1 airfoils. The investigation was made with the model moving over the water in a towing tank in order to eliminate the effects of wind-tunnel walls and of boundary layer on ground boards at small ground clearances. The results indicated that, as the ground was approached, the airfoils experienced an increase in lift-curve slope and a reduction in induced drag thus, lift-drag ratio was increased. As the ground was approached, the profile drag remained essentially constant for each airfoil. Near the ground, the addition of end plates to the airfoil resulted in a large increase in lift-drag ratio. The lift characteristics of the airfoils indicated stability of height at positive angles of attack and instability of height at negative angles; therefore, the operating range of angles of attack would be limited to positive values. At positive angles of attack, the static longitudinal stability was increased as the height above the ground was reduced. Comparison of the experimental data with Wieselsberger's ground-effect theory (NACA Technical Memorandum 77) indicated generally good agreement between experiment and theory for the airfoils without end plates.
NASA Technical Note
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 478 |
Release | : 1970 |
Genre | : Electronic Book |
ISBN | : MINN:319510008462734 |
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Effects of Ground Proximity on the Longitudinal Aerodynamic Characteristics of an Unswept Aspect ratio 10 Wing
Author | : Arthur W. Carter |
Publsiher | : Unknown |
Total Pages | : 68 |
Release | : 1970 |
Genre | : Ground-cushion phenomenon |
ISBN | : UIUC:30112106878637 |
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Ground proximity effects of unswept aspect ratio 10 wing on longitudinal aerodynamic characteristics.
Applied Mechanics Reviews
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 620 |
Release | : 1974 |
Genre | : Mechanics, Applied |
ISBN | : UCAL:C2682447 |
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U S Government Research Reports
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 182 |
Release | : 1962 |
Genre | : Science |
ISBN | : UOM:39015086571794 |
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General Aviation Aircraft Design
Author | : Snorri Gudmundsson |
Publsiher | : Butterworth-Heinemann |
Total Pages | : 1048 |
Release | : 2013-09-03 |
Genre | : Technology & Engineering |
ISBN | : 9780123973290 |
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Find the right answer the first time with this useful handbook of preliminary aircraft design. Written by an engineer with close to 20 years of design experience, General Aviation Aircraft Design: Applied Methods and Procedures provides the practicing engineer with a versatile handbook that serves as the first source for finding answers to realistic aircraft design questions. The book is structured in an "equation/derivation/solved example" format for easy access to content. Readers will find it a valuable guide to topics such as sizing of horizontal and vertical tails to minimize drag, sizing of lifting surfaces to ensure proper dynamic stability, numerical performance methods, and common faults and fixes in aircraft design. In most cases, numerical examples involve actual aircraft specs. Concepts are visually depicted by a number of useful black-and-white figures, photos, and graphs (with full-color images included in the eBook only). Broad and deep in coverage, it is intended for practicing engineers, aerospace engineering students, mathematically astute amateur aircraft designers, and anyone interested in aircraft design. Organized by articles and structured in an "equation/derivation/solved example" format for easy access to the content you need Numerical examples involve actual aircraft specs Contains high-interest topics not found in other texts, including sizing of horizontal and vertical tails to minimize drag, sizing of lifting surfaces to ensure proper dynamic stability, numerical performance methods, and common faults and fixes in aircraft design Provides a unique safety-oriented design checklist based on industry experience Discusses advantages and disadvantages of using computational tools during the design process Features detailed summaries of design options detailing the pros and cons of each aerodynamic solution Includes three case studies showing applications to business jets, general aviation aircraft, and UAVs Numerous high-quality graphics clearly illustrate the book's concepts (note: images are full-color in eBook only)
High Speed Marine Craft
Author | : Peter J. Mantle |
Publsiher | : Cambridge University Press |
Total Pages | : 627 |
Release | : 2015-12-11 |
Genre | : Science |
ISBN | : 9781107090415 |
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This book details the effort to build a large ship capable of traveling at 100 knots, from historical and technical perspectives.