National Advisory Committee for Aeronautics (NACA) - 17 Matching Results

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Mufflers for aeronautic engines

Description: Report presents the design, development and experimental results of muffling devices used to reduce noise generated by the airplane power plant.
Date: January 1, 1917
Creator: Diederichs, H. & Upton, G. B.
Partner: UNT Libraries Government Documents Department

Report on behavior of aeroplanes in gusts

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.
Date: January 1, 1917
Creator: Hunsaker, J C & Wilson, Edward Bidwell
Partner: UNT Libraries Government Documents Department

Thermodynamic efficiency of present types of internal combustion engines for aircraft

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.
Date: January 1, 1917
Creator: Lucke, Charles E.
Partner: UNT Libraries Government Documents Department