National Advisory Committee for Aeronautics (NACA) - 4 Matching Results
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- The application of basic data on planing surfaces to the design of flying-boat hulls
- From Introduction: "This report is concerned with the presentation of planning data in a form that facilities direct application to the initial stage of design."
- On the Application of Transonic Similarity Rules to Wings of Finite Span
- "The transonic aerodynamic characteristics of wings of finite span are discussed from the point of view of a unified small perturbation theory for subsonic, transonic, and supersonic flows about thin wings. This approach avoids certain ambiguities which appear if one studies transonic flows by means of equations derived under the more restrictive assumption that the local velocities are everywhere close to sonic velocity. The relation between the two methods of analysis of transonic flow is examined, the similarity rules and known solutions of transonic flow theory are reviewed, and the asymptotic behavior of the lift, drag, and pitching-moment characteristics of wings of large and small aspect ratio is discussed" (p. 1055).
- Nonstationary flow about a wing-aileron-tab combination including aerodynamic balance
- This paper presents a continuation of the work published in Technical Report no. 496. The results of that paper have been extended to include the effect of aerodynamic balance and the effect of a tab added to the aileron. The aerodynamic coefficients are presented in a form convenient for application to the flutter problem.
- Summary of scale-model thrust-reverser investigation
- An investigation was undertaken to determine the characteristics of several basic types of thrust-reverser. Models of three types, target, tailpipe cascade, and ring cascade, were tested with unheated air. The effects of design variables on reverse-thrust performance, reversed-flow boundaries, and thrust modulation characteristics were determined.