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Wind Tunnel Investigation Of Control Surface Characteristics
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Book Synopsis Wind-tunnel Investigation of Control-surface Characteristics by : Robert T. Jones
Download or read book Wind-tunnel Investigation of Control-surface Characteristics written by Robert T. Jones and published by . This book was released on 1942 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wind-tunnel tests have been made to investigate the possibility of reducing the hinge moments of a control surface by beveling the trailing edge. The tests were made with a 9-percent-thick airfoil having a 30-percent-chord plain flap. A faired beveled shape, 5 percent of the airfoil chord in width and having a thickness of 2.5 percent of the airfoil chord, was found to give approximately 50-percent reduction in the hinge moment caused by a given deflection of the flap and 80-percent reduction in the hinge moment due to the angle of attack of this airfoil for a wide range of angles. A blunter beveled portion of the same thickness gave overbalance and reversal of the floating tendency over a small angular range. Elliptical trailing-edge shapes were also tried but were found to be somewhat less effective than the shapes ending in an acute angle. A semicircular trailing edge produced only a slight change in the hinge moments but caused a drag increment much greater than that of an efficient beveled shape.
Book Synopsis Wind-tunnel Investigation of Control-surface Characteristics by : M. Leroy Spearman
Download or read book Wind-tunnel Investigation of Control-surface Characteristics written by M. Leroy Spearman and published by . This book was released on 1945 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary: Wind-tunnel tests have been made to determine the aerodynamic section characteristics of an NACA 0009 airfoil with a plain flap having a chord 25 percent of the airfoil chord and a balancing tab having a chord 50 percent of the airfoil chord or 200 percent of the flap chord so linked that the tab would deflect at a given rate with respect to the flap. Three linkage ratios were tested on the model. The tests indicated that the flap and tab could be linked to give hinge-moment balance with flap deflection and with angle of attack and yet have greater lift effectiveness than a plain flap of similar size with a conventional balancing tab having a chord 20 percent of the flap chord linked to give hinge-moment balance with flap deflection only.
Book Synopsis Wind-tunnel Investigation of Control-surface Characteristics by : Jr. H. Page Hoggard
Download or read book Wind-tunnel Investigation of Control-surface Characteristics written by Jr. H. Page Hoggard and published by . This book was released on 1945 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wind-tunnel Investigation of Control-surface Characteristics by : H. Page Hoggard
Download or read book Wind-tunnel Investigation of Control-surface Characteristics written by H. Page Hoggard and published by . This book was released on 1944 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pressure-distribution tests have been made in the NACA 4- by 6-foot vertical tunnel of a plain flap with interchangeable beveled trailing edges on an NACA 0009 airfoil. The flap chord was 30 percent of the airfoil chord and the bevel chords were 15 and 20 percent of the flap chord. The 15-percent bevel was tested with the bevel corner faired with both large and small radii. The purpose of these tests was to supply pressure-distribution data that may be used for structural and aerodynamic design of the horizontal and vertical tail surfaces.
Book Synopsis Wind-tunnel Investigation of Control-surface Characteristics by : I. Elizabeth Garner
Download or read book Wind-tunnel Investigation of Control-surface Characteristics written by I. Elizabeth Garner and published by . This book was released on 1944 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Correlation is established between aerodynamic characteristics of control surfaces in two-dimensional and three-dimensional flow. Slope of lift curve was affected little by overhang and balance-nose shape, but increased by sealing flap-nose gap. Effectiveness of balancing tab was same for sealed plain flap and unsealed overhang flap. Changes in hinge-moment coefficient were diminished by sealing gap. Values measured by three-dimensional flow disagreed with two-dimensional flow values until aspect ratio corrections were made.
Book Synopsis Wind-tunnel Investigation of Control-surface Characteristics by : Robert B. Liddell
Download or read book Wind-tunnel Investigation of Control-surface Characteristics written by Robert B. Liddell and published by . This book was released on 1944 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary: Wind-tunnel tests have been made in two-dimensional flow to investigate the aerodynamic characteristics of a double flap with an internal and an overhang balance. Three sizes of each type of balance were tested with three relative rates of deflection of the two flaps. An NACA 66-009 airfoil having a 0.30-airfoil-chord straight-contour forward flap and a 0.20-airfoil-chord straight-contour rearward flap was used. The test results indicated that a balanced double flap produced the same lift as a single plain flap of the same chord and also produced highly balanced hinge moments. High lifts and low hinge moments were obtained with a double-flap arrangement if either an overhang or an internal balance having a chord 50 percent of the flap chord was incorporated on the forward flap. The overhang-balance flap showed a lower value of the hinge-moment gradient due to flap deflection than the internally balanced flap.
Book Synopsis Wind-tunnel Investigation of Control-surface Characteristics by : Richard I. Sears
Download or read book Wind-tunnel Investigation of Control-surface Characteristics written by Richard I. Sears and published by . This book was released on 1942 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analysis has been made to determine the probable aerodynamic section characteristics of a plain flap with various arrangements of an internal balance. Tests in two-dimensional flow have been made in the NACA 4- by 6-foot vertical tunnel of an NACA 0009 airfoil with an internally balanced flap in order to check the validity of the analytical calculation. The results of these tests, presented in this paper, indicate that the calculations are in agreement with experiment. The analysis has been extended on the basis of the lifting-line theory to include an approximate method for the design of an internal balance for a control surface of finite span.
Book Synopsis Wind-tunnel Investigation of Control-surface Characteristics by : Vernard E. Lockwood
Download or read book Wind-tunnel Investigation of Control-surface Characteristics written by Vernard E. Lockwood and published by . This book was released on 1945 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wind-Tunnel Investigation of Control-Surface Characteristics, Vol. 20 by : I. Elizabeth Garner
Download or read book Wind-Tunnel Investigation of Control-Surface Characteristics, Vol. 20 written by I. Elizabeth Garner and published by Forgotten Books. This book was released on 2017-11-19 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Wind-Tunnel Investigation of Control-Surface Characteristics, Vol. 20: Plain and Balanced Flaps on an Naca 0009 Rectangular Semispan Tail Surface The test results indicated that the slope of the lift curve was affected little by the amount of overhang and the balance nose shape but was increased by sealing the gap at the flap nose. At zero angle of attack, the variation of lift with flap deflection for the sealed-gap condition was the same as or slightly greater than for the unsealed-gap condition. The change in the hinge moment coefficient with angle of attack or with flap deflection generally was made more negative with sealing the gap. The effectiveness of the balancing tab in reducing the flap hinge-moment coefficients was approxi mately the same for both the sealed plain flap and the unsealed 35-percent-f1ap - chord elliptical overhang; also, the variation of lift coefficient with tab deflection was about equal for the plain flap and for the flap with aero dynamic balance. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Book Synopsis Wind-tunnel Investigation of Control-surface Characteristics by : John M. Riebe
Download or read book Wind-tunnel Investigation of Control-surface Characteristics written by John M. Riebe and published by . This book was released on 1945 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary: Blunt-nose and elliptical-nose overhangs of 0.35 and 0.50 flap chord and a plain overhang on a flap having a chord of 0.20 airfoil chord have been tested in two-dimensional flow on an NACA 0009 airfoil. The results of the tests are presented as aerodynamic section characteristics for several flap deflections with the gap at the flap nose sealed or unsealed. Tests were made also to determine the effectiveness of a tab of 0.20 flap chord on the plain sealed flap and on a sealed flap having an elliptical overhang of 0.35 flap chord. The pressure difference across the flap seal was also determined for the plain sealed flap.
Book Synopsis Wind-tunnel Investigation of Control-surface Characteristics by : John M. Riebe
Download or read book Wind-tunnel Investigation of Control-surface Characteristics written by John M. Riebe and published by . This book was released on 1945 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary: Wind-tunnel tests have been made to investigate the characteristics of an NACA 0009 airfoil with a 40-percent-chord flap having medium and large aerodynamic balances of elliptical and blunt nose shapes and having a plain overhang. The results are presented as aerodynamic section characteristics for several flap deflections with the gap at the flap nose sealed and unsealed. Tests were also made to determine the effectiveness of a tab, which was 20 percent of the flap chord, on the plain sealed flap and on the 35-percent-flap-chord elliptical-overhang flap with gap sealed. The pressure difference across the flap-nose seal was also determined for the plain sealed flap.
Book Synopsis Wind-tunnel Investigation of Control-surface Characteristics by : Richard I. Sears
Download or read book Wind-tunnel Investigation of Control-surface Characteristics written by Richard I. Sears and published by . This book was released on 1942 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wind-tunnel Investigation of Control-surface Characteristics by : Vernard E. Lockwood
Download or read book Wind-tunnel Investigation of Control-surface Characteristics written by Vernard E. Lockwood and published by . This book was released on 1944 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Force tests in two-dimensional flow have been made in the NACA 4- by 6-foot vertical tunnel to determine the aerodynamic characteristics of an NACA 0009 airfoil with flaps having chords 20, 30, and 40 percent of the airfoil chord and 20, 30, and 40 degrees beveled trailing edges. The effect of a gap at the nose of the flap and of a rough leading edge was determined for the flaps equipped with a 30 degree beveled trailing edge.
Book Synopsis Wind-Tunnel Investigation of Control-Surface Characteristics, Vol. 19 by : Robert B. Liddell
Download or read book Wind-Tunnel Investigation of Control-Surface Characteristics, Vol. 19 written by Robert B. Liddell and published by Forgotten Books. This book was released on 2017-10-28 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Wind-Tunnel Investigation of Control-Surface Characteristics, Vol. 19: A Double Flap With an Overhang and an Internal Aerodynamic Balance The tests were made in the Naca y 6 foot vertical tunnel (reference 2) modified as discussed in reference 5. The 2-foot-chord by h-foot-span model was made of lami hated mahogany, except for the front flap which was steel. The airfoil conformed to the naca 66-009 airfoil contour forward of the forward-flap hinge axis and to a straight line contour behind this hinge axis. The model was pro vided with a forward flap and a 0.2oc rearward flap. Figure 1 shows the me.hod used to connect the flaps to each other and to the airfoil. He rearward flan was connected to the forward flap by a mechanism that allowed he rearward flap to deflect one, two, or three times as fast as the forward flan; that is, doz/ddl equals either 1, 2, or 5. Mhe forward flap was orovided with three interchangeable blunt-nose overhang balances and three interchangeable internal balances having chords 25, to, and 50 percent of the forward-flan chord. The arrangements tested and pertinent model dimensions are shown in figure 2. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author :Langley Aeronautical Laboratory Publisher :Hassell Street Press ISBN 13 :9781014919755 Total Pages :126 pages Book Rating :4.9/5 (197 download)
Book Synopsis Wind-tunnel Investigation of Control-surface Characteristics. by : Langley Aeronautical Laboratory
Download or read book Wind-tunnel Investigation of Control-surface Characteristics. written by Langley Aeronautical Laboratory and published by Hassell Street Press. This book was released on 2021-09-10 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Book Synopsis Wind Tunnel Investigation of Control Surface Characteristics by : H. Page Hoggard
Download or read book Wind Tunnel Investigation of Control Surface Characteristics written by H. Page Hoggard and published by . This book was released on 1943 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Force-test measurements in two-dimensional flow have been made in the NACA 4- by 6-foot vertical tunnel to determine the aerodynamic effects of changing the alignment of the cover plates on a sealed internally balanced flap. An NACA 0015 airfoil was utilized for the tests. The chord of the straight-contour flap was 30 percent of the airfoil chord and the balance with 50 percent of the flap chord.
Book Synopsis Wind-tunnel Investigation of Control-surface Characteristics. by : Langley Aeronautical Laboratory
Download or read book Wind-tunnel Investigation of Control-surface Characteristics. written by Langley Aeronautical Laboratory and published by Hassell Street Press. This book was released on 2021-09-09 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
