Download or read book Aerodynamic Characteristics of Several Airfoils of Low Aspect Ratio written by Charles Horton Zimmerman and published by . This book was released on 1935 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Ground Proximity on the Aerodynamic Characteristics of Aspect ratio 1 Airfoils with and Without End Plates written by Arthur W. Carter and published by . This book was released on 1961 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book The Elements of Aerofoil and Airscrew Theory written by H. Glauert and published by Cambridge University Press. This book was released on 1983-06-09 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: More than half a century has elapsed since the first edition of The Elements of Aerofoil and Airscrew Theory appeared in 1926, a period in which massive advances have been made in the understanding and description of aerodynamic phenomena. Yet Glauert was an acknowledged master of his subject and his book remains the most lucid and best organised introduction to the fundamental principles of aerodynamics that has ever been written. This new paperback edition reprints the text of the second edition of 1947, with supplementary notes by H. B. Squire.

Download or read book Experimental Investigation of Low Aspect Ratio Aerofoils written by John Edwin Bertrand and published by . This book was released on 1972 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Aspect Ratio on Air Flow at a High Subsonic Mach Numbers written by W. F. Lindsey and published by . This book was released on 1948 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Schlieren photographs were used in an investigation to determine the effects of changing the aspect ratio from infinity to two on the air flow past a wing at high subsonic Mach numbers. The results indicated that the decreased effects of compressibility on drag coefficients for the finite wing are produced by a reduction in the compression shock and flow separation.

Download or read book Aerofoils of High Aspect Ratio written by F. W. Lanchester and published by . This book was released on 1913 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation at Transonic Speeds of the Loading Over a 45 Degree Sweptback Wing Having an Aspect Ratio of 3 a Taper Ratio of 0 2 and NACA 65A004 Airfoil Sections written by Jack F. Runckel and published by . This book was released on 1956 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation at transonic speeds of the loading over a 45 degree sweptback wing having an aspect ratio of 3, a taper ratio of 0.2, and NACA 65A004 airfoil sections has been conducted in the Langley16-foot transonic tunnel. Pressure measurements on the wing-body combination were obtained at angles of attack from 0 to 26 degrees at Mach numbers from 0.80 to 0.98 and from 0 to about 12 degrees at Mach numbers from 1.00 to 1.05. Reynolds number, based on the wing mean aerodynamic chord, varied from 7,000,000 to 8,500,000 over the test Mach number range.

Download or read book Measurements of the Effects of Thickness Ratio and Aspect Ratio on the Drag of Rectangular plan form Airfoils at Transonic Speeds written by Jim Rogers Thompson and published by . This book was released on 1947 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of an investigation to determine the effect of variation of basic airfoil parameters on airfoil drag characteristics at transonic and supersonic speeds, a series of rectangular-plan-form airfoils having aspect ratios of 7.6 and 5.1 and having NCA 65-006, 65-009, and 65-012 sections have been tested by the free-fall method. In the present paper results are presented for two airfoils of the series (those having NACA 65-012 sections and aspect ratios of 7.6 and 5.1) and are compared with results for other airfoils of the series which were reported previously.

Download or read book The Properties of Aerofoils and Aerodynamic Bodies written by Authur W. Jundge and published by . This book was released on 1917 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Airfoil Profile of Symmetrical Sections on the Low speed Rolling Derivatives of 45 Sweptback wing Models of Aspect Ratio 2 61 written by William Letko and published by . This book was released on 1949 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation was made in the Langley stability tunnel to determine the effect of airfoil profile of symmetrical sections on the rolling derivatives of three untapered wings having 45 deg sweepback. The wings had the following profiles normal to the leading edge: biconvex (12% thick), NACA 65 sub 1 -012, and NACA 0012. The AR for each wing was 2.61. Calculations were made to determine the effect of different wing profiles on the stability boundaries and motions at subsonic speeds of a typical transonic airplane configuration. Results indicate that increasing the sharpness of the leading edge of the airfoil decreased the range of lift coefficients over which the derivatives maintained their initial trends and usually decreased the maximum values of the derivatives obtained in the unstalled range. Results of the calculations of the dynamic stability of the airplane configuration show only small changes in stability due to changes in airfoil profile.

Download or read book The Limit of Circulation Lift on Airfoils of Finite Aspect Ratio written by Clarence Donald Cone and published by . This book was released on 1960 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Properties of Aerofoils and Aerodynamic Bodies written by Arthur William Judge and published by . This book was released on 1917 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Elements of Aerofoil and Airscrew Theory written by Hermann Glauert and published by . This book was released on 1926 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Aspect Ratio and Shape of Wing Tip on Aerofoil Characteristics written by H. Glauert and published by . This book was released on 1919 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Static Aerodynamic Characteristics of Three Ram air inflated Low aspect ratio Fabric Wings written by Sanger M. Burk and published by . This book was released on 1967 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of the low-speed static aerodynamic characteristics of three ram-air-inflated low-aspect-ratio fabric wings has been made in the Langley full-scale tunnel. The wings which were rectangular in planform and had an airfoil-shaped cross section were open at the nose to allow air to enter and inflate the wings; the payload was suspended on lines below the wings. Effects of four different test setups were also determined. The results indicated that the untrimmed maximum lift-drag ratios of the wings ranged from 1.9 to 2.7 and that the untrimmed maximum lift coefficients varied from about 0.9 to 1.1.

Download or read book Aerodynamics of the Model Airplane Airfoil measurements written by Franz Wilhelm Schmitz and published by . This book was released on 1967 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Aerofoil Aspect Ratio on the Slope of the Lift Curve written by Walter Stuart Diehl and published by . This book was released on 1922 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most important characteristics of an aerofoil is the rate of change of lift with angle of attack. This tactor determines the effectiveness of a tail plane in securing static longitudinal stability.