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 Serial/Series Title: NACA Technical Reports
 Collection: National Advisory Committee for Aeronautics Collection
Results 1401 - 1422 of 1,422
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Fabrics for aeronautic construction

Fabrics for aeronautic construction

Date: January 1, 1918
Creator: Walen, E D
Description: The Bureau of Standards undertook the investigation of airplane fabrics with the view of finding suitable substitutes for the linen fabrics, and it was decided that the fibers to be considered were cotton, ramie, silk, and hemp. Of these, the cotton fiber was the logical one to be given primary consideration. Report presents the suitability, tensibility and stretching properties of cotton fabric obtained by laboratory tests.
Contributing Partner: UNT Libraries Government Documents Department
An investigation of the elements which contribute to statical and dynamical stability, and of the effects of variation in those elements

An investigation of the elements which contribute to statical and dynamical stability, and of the effects of variation in those elements

Date: January 1, 1918
Creator: Klemin, Alexander; Warner, Edward P & Denkinger, George M
Description: Part 1 gives details of models tested and methods of testing of the Eiffel 36 wing alone and the JN2 aircraft. Characteristics and performance curves for standard JN are included. Part 2 presents a statistical analysis of the following: lift and drag contributed by body and chassis tested without wings; lift and drag contributed by tail, tested without wings; the effect on lift and drift of interference between the wings of a biplane combination; lift and drag contributed by the addition of body, chassis, and tail to a biplane combination; total parasite resistance; effect of varying size of tail, keeping angle of setting constant; effect of varying length of body and size of tail at the same time, keeping constant moment of tail surface about the center of gravity; forces on the tail and the effects of downwash; effect of size and setting of tail on statical longitudinal stability effects of length of body on stability; the effects of the various elements of an airplane on longitudinal stability and the placing of the force vectors. Part 3 presents the fundamental principals of dynamical stability; computations of resistance derivatives; solution of the stability equation; dynamical stability of the Curtiss JN2; tabulation ...
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Nomenclature for aeronautics

Nomenclature for aeronautics

Date: January 1, 1918
Creator: unknown
Description: Report defines the principal terms which have come into use in the development of aeronautics.
Contributing Partner: UNT Libraries Government Documents Department
Periodic stresses in gyroscopic bodies, with applications to air screws

Periodic stresses in gyroscopic bodies, with applications to air screws

Date: January 1, 1918
Creator: Zahm, A F
Description: Report discusses periodic stresses in gyroscopic bodies with applications to air screws caused by particle mass. Report concludes that all modern air screws obey the laws found for plane groups of particles. In particular the two-bladers exert on the shaft a rhythmic gyroscopic torque; the multibladers a steady one; both easily calculable for any given conditions of motion and mass distribution.
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 & Dietzius, Alexander
Description: Report presents the performance of fabrics used for the envelopes of airships.
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
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
Aeronautic Power Plant Investigations

Aeronautic Power Plant Investigations

Date: January 1, 1917
Creator: Dickinson, H. C.
Description: Report presents the design of radiators, spark plugs and test equipment used to test the performance of aeronautic engines at high altitudes.
Contributing Partner: UNT Libraries Government Documents Department
Carburetor design - a preliminary study of the state of the art

Carburetor design - a preliminary study of the state of the art

Date: January 1, 1917
Creator: Lucke, Charles Edward & Willhofft, Friederich Otto
Description: Report presents a preliminary study of the state of the art of the design of carburetors for gasoline engines used in aeronautic, marine and land transportation service.
Contributing Partner: UNT Libraries Government Documents Department
Experimental researches on the resistance of air

Experimental researches on the resistance of air

Date: January 1, 1917
Creator: Marchis, L
Description: Report presents the experimental results of the resistance of air of a body moving in relative movement to the air with which it is surrounded.
Contributing Partner: UNT Libraries Government Documents Department
General specifications covering requirements of aeronautic instruments

General specifications covering requirements of aeronautic instruments

Date: January 1, 1917
Creator: unknown
Description: Report includes specifications for the use and production of instruments used in the navigation and operation of aircraft. Specifications are included for the following instruments: barometer or altimeter, compass, air speed meter, inclinometer, drift meter, tachometer, oil gauge, oil pressure gauge, gasoline gauge, gasoline flow indicator, distance indicator, barograph, angle of attack indicator, radiator temperature indicator, gasoline feed system pressure indicator, sextant, airplane director.
Contributing Partner: UNT Libraries Government Documents Department
Investigation of Pitot tubes

Investigation of Pitot tubes

Date: January 1, 1917
Creator: Herschel, W H & Buckingham, E
Description: Report describes the principles of operation and characteristics of some of the instruments which have been devised or used to measure both low and high speeds of aeroplanes. Since the pitot tube is the instrument which has been most commonly used in the United States and Great Britain as a speedometer for aeroplanes, it is treated first and somewhat more fully than the others.
Contributing Partner: UNT Libraries Government Documents Department
Investigations of Balloon and Aeroplane Fabrics

Investigations of Balloon and Aeroplane Fabrics

Date: January 1, 1917
Creator: Gibbons, Willis A & Smith, Omar H
Description: Report presents the experimental results of fabrics used for balloons and aeroplanes. Tensile properties, surface roughness, skin friction, flammability, permeability, and water absorption were tested for different combinations of materials.
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Meteorology and aeronautics

Meteorology and aeronautics

Date: January 1, 1917
Creator: Blair, William R
Description: A handbook in which properties and general phenomena of the atmosphere which aeronauts and aviators should understand are discussed.
Contributing Partner: UNT Libraries Government Documents Department
Mufflers for aeronautic engines

Mufflers for aeronautic engines

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

Nomenclature for aeronautics

Date: January 1, 1917
Creator: unknown
Description: Report defines the principal terms which have come into use in the development of aeronautics. (author).
Contributing Partner: UNT Libraries Government Documents Department
Preliminary report on the problem of the atmosphere in relation to aeronautics

Preliminary report on the problem of the atmosphere in relation to aeronautics

Date: January 1, 1917
Creator: Marvin, Charles F
Description: A report to the Weather Bureau, Washington DC, from the chairman of the Subcommittee on the Atmosphere in Relation to Aeronautics describing the activities accomplished and the proposal of work to be undertaken by the subcommittee.
Contributing Partner: UNT Libraries Government Documents Department
Relative worth of improvements of fabrics

Relative worth of improvements of fabrics

Date: January 1, 1917
Creator: unknown
Description: Report presents an equation that connects all the major qualities of a fabric, from which the fabric may be rigidly designed with respect to maximum ultimate economy.
Contributing Partner: UNT Libraries Government Documents Department
Report on behavior of aeroplanes in gusts

Report on behavior of aeroplanes in gusts

Date: January 1, 1917
Creator: Hunsaker, J C & Wilson, Edward Bidwell
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.
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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; Horn, H J & Green, D
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
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