Wind-tunnel investigation of a number of total-pressure tubes at high angles of attack : subsonic speeds
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Gracey, William↗
Engineering topics
Gracey, William
Publications and source records attributed to Gracey, William.
Position errors of the service airspeed installations of 10 airplanes
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INSTRUMENTS - ERRORS↗
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)
MOMENTS OF INERTIA↗
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.
Gracey, William↗
Measured moments of inertia of 32 airplanes
A compilation of the experimentally determined moments of inertia of 32 airplanes is presented. The measurements were obtained at the laboratories of the naca by means of a pendulum method. The airplanes tested are representative of several types of aircraft of gross weight less than 10,000 pounds. The results are presented in coefficient as well as in dimensional form. An elementary analysis of the data disclosed the possibility of grouping the results according to wing type of the airplane, as low-wing monoplanes, parasol and high-wing monoplanes, and biplanes. The data are shown to provide a convenient means of rapidly estimating the moments of inertia of other airplanes. A three view drawing of each of the 32 airplanes is included.
Gracey, William↗