Measurement of static pressure on aircraft

Existing data on the errors involved in the measurement of static pressure by means of static-pressure tubes and fuselage vents are presented. The errors associated with the various design features of static-pressure tubes are discussed for the condition of zero angle of attack and for the case where the tube is inclined to flow. Errors which result from variations in the configuration of static-pressure vents are also presented. Errors due to the position of a static-pressure tube in the flow field of the airplane are given for locations ahead of the fuselage nose, ahead of the wing tip, and ahead of the vertical tail fin. The errors of static-pressure vents on the fuselage of an airplane are also presented. Various methods of calibrating static-pressure installations in flight are briefly discussed

The experimental determination of the moments of inertia of airplanes by a simplified compound-pendulum method

A simplified compound-pendulum method for the experimental determination of the moments of inertia of airplanes about the x and y axes is described. The method is developed as a modification of the standard pendulum method reported previously in NACA report, NACA-467. A brief review of the older method is included to form a basis for discussion of the simplified method. (author

The Additional-Mass Effect of Plates as Determined by Experiments

The apparent increase in the inertia properties of a body moving in a fluid medium has been called the additional-mass effect. This report presents a resume of test procedures and results of experimental determinations of the additional-mass effect of flat plates. In addition to data obtained from various foreign sources and from a NACA investigation in 1933, the results of tests recently conducted by the National Advisory Committee for Aeronautics are included

The Design and Low Mach Number Wind-Tunnel Performance of a Modified NACA 23012 Aerofoil, With an Investigation of Dynamic Stall Onset

In recent years, much of the research into aerodynamics performed at the University of Glasgow has considered the behaviour of helicopter and wind-turbine aerofoils in unsteady conditions. Theoretical predictive algorithms have not yet been developed fully and so there is still a great need to examine experimentally-recorded data. The present research was undertaken in an attempt to increase knowledge of the mechanism of trailing-edge dynamic stall at low Mach numbers. Consequently, the NACA 23012 aerofoil section has been modified over the trailing 75% chord to increase camber, and a model of the resulting aerofoil subjected to a series of wind-tunnel experiments

Wind-tunnel investigation of a number of total-pressure tubes at high angles of attack -- subsonic, transonic, and supersonic speeds

The effect of inclination of the airstream on the measured pressures of 54 total-pressure tubes has been determined for angles of attack up to 60 degrees and over a Mach number range from 0.26 to 1.62. The investigation was conducted in five wind tunnels at the Langley Aeronautical Laboratory