Download or read book Flutter Investigation at Low Speed of a 40 Degree Sweptback Wing with Pylon mounted Stores Tested as a Semispan cantilever Wing and as a Full span Wing on a Towed Airplane Model written by Albert P. Martina and published by . This book was released on 1956 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wind-tunnel flutter investigations at Mach numbers up to 0.30 have been conducted on a 40 degree sweptback wing having pylon-mounted stores located at 73.5 percent of the semispan. The investigations were conducted on a semispan-cantilever wing with root fixed and with the full-span wing mounted on an autopilot-controlled model of a fighter-type airplane flown on the end of a towline. The store loadings were varied from 55 to 88 percent of the wing-panel weight, and the store pitch inertias were varied from 66 to 181 percent of the wing-panel pitch inertia. Most of the data were obtained with the store centers of gravity located at 15 percent of the local wing chord.
Download or read book Results of Initial Wind tunnel Flutter Experiments at Low Speed with a Towed Airplane Model Having a 40 Degree Sweptback Wing of Aspect Ratio 3 62 Equipped with Pylon mounted Stores written by Albert P. Martina and published by . This book was released on 1955 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transonic Flutter Investigation of a Cantilevered Aspect ratio 4 45 Degree Sweptback Untapered Wing with Three Different Pylon mounted External Store Configurations written by Charles L. Ruhlin and published by . This book was released on 1957 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: A brief, exploratory investigation has been made of the transonic flutter characteristics of a cantilevered, aspect-ratio-4, 45 degree sweptback, untapered wing with three different pylon-mounted external-store configuration. For stores located near the midsemispan and weighing about 0.7 of the semispan wing, the flutter speed was not changed when the store center of gravity was moved from 38 to 12 percent of the chord. The flutter speeds for these two stores were from 14 to 19 percent less than those obtained with the wings alone at subsonic speeds. The rate of rise of flutter speed with Mach number in the low supersonic range was about the same for the wing with stores as for the plain wing.
Download or read book Experimental and Analytical Investigation of Flutter of a Nonuniform Sweptback Cantilever Wing with Two Concentrated Weights written by John L. Sewall and published by . This book was released on 1951 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Results of Initial Wind tunnel Flutter Experiments at Low Speed with a Towed Airplane Model Having a 40 Sweptback Wing of Aspect Ratio 3 62 Equipped with Pylon mounted Stores written by Albert P. Martina and published by . This book was released on 1955 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flutter Investigation of a True speed Dynamic Model with Various Tip tank Configurations written by John L. Sewall and published by . This book was released on 1960 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Transonic Flutter Characteristics of a Thin 10 Degree Sweptback Wing Having an Aspect Ratio of 4 and a Taper Ratio of 0 6 written by George W. Jones and published by . This book was released on 1957 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: A flutter investigation has been made in the Langley transonic blowdown tunnel at Mach numbers between 0.79 and 1.34 on a thin 10 degree sweptback wing having an aspect ratio of 4 and a taper ratio of 0.6. The data obtained have been compared with data from NACA Research Memorandum L55I13A for zero and 30 degree sweptback wings of the type investigated, the flutter boundary for the 10 degree sweptback wing falls between those for the zero degree and 30 degree sweptback wings in the low supersonic Mach number range. However, the subsonic level (around a Mach number of 0.8) of the flutter boundary for the 10 degree sweptback wing lies above those for the zero and 30 degree sweptback wings. In addition, the amount of rise in the flutter boundary from the subsonic level to the supersonic values is about the same for the wings with angles of sweepback of 10 degrees and zero degrees, but is much greater for the wing with an angle of sweepback of 30 degrees.
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 Cumulative Title Index to United States Public Documents 1789 1976 written by Daniel W. Lester and published by . This book was released on 1980 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flutter Investigation of Two Thin Low aspect ratio Swept Solid Metal Wings in the Transonic Range by Use of Free falling Body written by W. T. Lauten and published by . This book was released on 1952 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Subsonic Flutter Characteristics of a Variable Sweep Wing and Horizontal Tail Combination written by Walter J. Mykytow and published by . This book was released on 1970 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The project concerns a subsonic investigation of a new type of flutter phenomenon, not previously critical from a design standpoint, involving elastic modes of the wing, fuselage, and stabilizer combination and also involving aerodynamic interference between the wing and horizontal tail. The effort, consisting of design of a flutter model, vibration and subsonic wind tunnel tests, and flutter analyses, was conducted to determine important controlling flutter parameters, to evaluate the accuracy of analyses for predicting the phenomenon, to establish flutter trends and to define flutter prevention design criteria which could be used in the early design stage to avoid the problem. Some of the important features that were determined are increasing wing sweep can lead to lower flutter speeds; wing bending to fuselage torsion frequency ratios were defined which provide the mechanical coupling essential to produce the phenomenon and minimum flutter speeds as a function of wing sweep angle; vertical separation or dihedral angle can be very influential and beneficial and is more important than longitudinal separation, the effects of which were found to be small to moderate; the effects of compressibility have been shown to be detrimental and decrease the flutter speed, and conclusive proof that the interference aerodynamics between the wind and tail, and particularly, the downwash shed from the wing, is an important and detrimental feature to the phenomenon. (Author).
Download or read book Effect of a Flexibly Mounted Store on the Flutter Speed of a Wing written by and published by . This book was released on 1980 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gust tunnel Investigation of a Flexible wing Model with Semichord Line Swept Back 45 written by Thomas D. Reisert and published by . This book was released on 1949 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation was made in the Langley gust tunnel of a flexible-wing model with the semichord line swept back 45 degrees to obtain experimental data on the amount of gust-load alleviation that might be expected as a result of the wings flexing under load. The results indicated that unless adverse pitching motion could be eliminated or reduced the over-all load reduction would be small. The net reduction in bending moment, however, may be appreciable.
Download or read book Wing store Flutter with Nonlinear Pylon Stiffness written by and published by . This book was released on 1980 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation at Low Speed of a 51 3 Degree Sweptback Semispan Wing with a Raked Tip and with 16 7 percent chord Ailerons Having Three Spans and Three Trailing edge Angles written by Jack Fischel and published by . This book was released on 1948 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low speed Investigation of the Effects of Frequency and Amplitude of Oscillation in Sideslip on the Lateral Stability Derivatives of a 60 Degree Delta Wing a 40 Degree Sweptback Wing and an Unswept Wing written by Jacob H. Lichtenstein and published by . This book was released on 1961 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transonic Flutter Investigation of Models of the X 15 Airplane Horizontal Tail written by Lou S. Young and published by . This book was released on 1961 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
