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  Partner: UNT Libraries Government Documents Department
 Decade: 1910-1919
 Collection: National Advisory Committee for Aeronautics Collection
Report on behavior of aeroplanes in gusts

Report on behavior of aeroplanes in gusts

Date: January 1, 1917
Creator: Hunsaker, J C
Description: Part 1 presents the results of a wind tunnel test of a biplane model with an 18 inch span. The lift, drift, and pitching moment were measured for a series of angles of incidence corresponding to the maximum possible changes of flight attitude. Only the discussion of symmetrical or longitudinal changes is given. From the observed rate of variation of the forces and pitching moment, it was possible to calculate the derivatives needed in the complete theory of longitudinal stability in still air. The damping of the pitching oscillation was also determined experimentally. Part 2 presents a theoretical method for determining the effects of gusts on aeroplanes in the following cases: (1) head-on gusts rising from 0 to j feet per second with various degrees of sharpness, (2) up gusts of the same type, (3) rotary gusts of the same type, (4) rear gusts and down gusts are included by merely changing the sign of j.
Contributing Partner: UNT Libraries Government Documents Department
Report on investigations of aviation wires and cables, their fastenings and terminal connections

Report on investigations of aviation wires and cables, their fastenings and terminal connections

Date: January 1, 1917
Creator: Sunderlang, C C
Description: Report presents results that show that it is possible to furnish efficient terminal connections that would allow for repairs for aviation wires and cables and eliminate the use of acid solder and blow torch.
Contributing Partner: UNT Libraries Government Documents Department
The stretching of the fabric and the deformation of the envelope in nonrigid balloons

The stretching of the fabric and the deformation of the envelope in nonrigid balloons

Date: January 1, 1918
Creator: Haas, Rudolf
Description: Report presents the performance of fabrics used for the envelopes of airships.
Contributing Partner: UNT Libraries Government Documents Department
Temperatures in Spark Plugs Having Steel and Brass Shells

Temperatures in Spark Plugs Having Steel and Brass Shells

Date: January 1, 1919
Creator: Cragoe, C S
Description: This investigation was conducted at the Bureau of Standards for the National Advisory Committee for Aeronautics. Brass has often been assumed superior to steel for spark plug shells because of its greater heat conductivity. The measurements described in this report prove the contrary, showing that the interior of a spark plug having a brass shell is from 50 degrees to 150 degrees c. (90 degrees to 270 degrees f.) hotter than that of a similar steel plug. Consistent results were obtained in both an aviation and a truck engine, and under conditions which eliminated all other sources of difference between the plugs. It is to be concluded that steel is to be preferred to brass for spark plug shells. This report embodies the results of measurements taken of electrodes and a comparison of brass and steel insulators of spark plugs while they were in actual operation. The data throw considerable light upon the problem of the proper control of temperatures in these parts.
Contributing Partner: UNT Libraries Government Documents Department
Theory of an airplane encountering gusts II

Theory of an airplane encountering gusts II

Date: January 1, 1918
Creator: Wilson, Edwin Bidwell
Description: Calculations of aerodynamic effects of an airplane encountering gusts are presented.
Contributing Partner: UNT Libraries Government Documents Department
Theory of an Airplane Encountering Gusts III

Theory of an Airplane Encountering Gusts III

Date: January 1, 1918
Creator: Wilson, Edwin Bidwell
Description: Report presents a new method for solving linear equations developed by Bromwich, which is suited to determine the motion for any particular gust, when the machine started from equilibrium, without the trouble of determining the constants of integration in the complementary function. (author).
Contributing Partner: UNT Libraries Government Documents Department
Thermodynamic efficiency of present types of internal combustion engines for aircraft

Thermodynamic efficiency of present types of internal combustion engines for aircraft

Date: January 1, 1917
Creator: Lucke, Charles E
Description: Report presents requirements of internal combustion engines suitable for aircraft. Topics include: (1) service requirements for aeronautic engines - power versus weight, reliability, and adaptability factors, (2) general characteristics of present aero engines, (3) aero engine processes and functions of parts versus power-weight ratio, reliability, and adaptability factors, and (4) general arrangement, form, proportions, and materials of aero parts - power-weight ratio, reliability, and adaptability.
Contributing Partner: UNT Libraries Government Documents Department
The Variation of Yawing Moment Due to Rolling

The Variation of Yawing Moment Due to Rolling

Date: January 1, 1918
Creator: Wilson, Edwin Bidwell
Description: The aerodynamical constants of an airplane necessary for the discussion of stability are partly observed and partly calculated. Among the calculated coefficients is n(p), which is the variation of yawing moment due to rolling. (author).
Contributing Partner: UNT Libraries Government Documents Department
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