Author: John C. StonesiferPublisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 28
Book Description
Transonic and Supersonic Flutter Trend Investigation of a Variable-sweep Wing
Author: John C. StonesiferPublisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 28
Book Description
Transonic and Supersonic Flutter Trend Investigation of a Variable-sweep Wing
Author: Proceedings of NASA Conference on Supersonic-Transport Feasibility Studies and Supporting Research, September 17-19, 1963, Langley Research Center, Langley Station, Hampton, Va
Author: Publisher:
ISBN:
Category : Supersonic transport planes
Languages : en
Pages : 528
Book Description
NASA Technical Note
Author: Scientific and Technical Aerospace Reports
Author: Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1460
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
U.S. Government Research & Development Reports
Author: NASA Scientific and Technical Reports
Author: United States. National Aeronautics and Space Administration Scientific and Technical Information DivisionPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 2300
Book Description
Subsonic and Supersonic Flutter Analysis of a Highly Tapered Swept-wing Planform, Including Effects of Density Variation and Finite Wing Thickness, and Comparison with Experiments
Author: E. Carson Yates (Jr.)Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 74
Book Description
The flutter characteristics of several wings with an aspect-ratio of 4.0, a taper ratio of 0.2, and a quarter-chord sweepback of 45 deg. have been investigated analytically for Mach numbers up to 2.0. The calculations were based on the modified-strip-analysis method, the subsonic-kernel-function method, piston theory, and quasi-steady second-order theory. Results of t h e analysis and comparisons with experiment indicated that: (1) Flutter speeds were accurately predicted by the modified strip analysis, although accuracy at t h e highest Mach numbers required the use of nonlinear aerodynamic theory (which accounts for effects of wing thickness) for the calculation of the aerodynamic parameters. (2) An abrupt increase of flutter-speed coefficient with increasing Mach number, observed experimentally in the transonic range, was also indicated by the modified strip analysis. (3) In the low supersonic range for some densities, a discontinuous variation of flutter frequency with Mach number was indicated by the modified strip analysis. An abrupt change of frequency appeared experimentally in the transonic range. (4) Differences in flutter-speed-coefficient levels obtained from tests at low supersonic Mach numbers in two wind tunnels were also predicted by the modified strip analysis and were shown to be caused primarily by differences in mass ratio. (5) Flutter speeds calculated by the subsonic-kernel-function method were in good agreement with experiment and with the results of the modified strip analysis. (6) Flutter speed obtained from piston theory and from quasi-steady second-order theory were higher than experimental values by at least 38 percent.
Flutter Studies of Simplified Component Models of a Variable-sweep-wing Airplane at Mach Numbers Up to 3.0
Author: Maynard C. SandfordPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 50
Book Description
A Selected Listing of NASA Scientific and Technical Reports for 1966
Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information DivisionPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 2084
Book Description