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  Partner: UNT Libraries Government Documents Department
 Decade: 1910-1919
 Year: 1918
 Collection: National Advisory Committee for Aeronautics Collection
Aerodynamic coefficients and transformation tables

Aerodynamic coefficients and transformation tables

Date: January 1, 1918
Creator: Ames, Joseph S
Description: The problem of the transformation of numerical values expressed in one system of units into another set or system of units frequently arises in connection with aerodynamic problems. Report contains aerodynamic coefficients and conversion tables needed to facilitate such transformation. (author).
Contributing Partner: UNT Libraries Government Documents Department
Aerofoils and aerofoil structural combinations

Aerofoils and aerofoil structural combinations

Date: January 1, 1918
Creator: Gorrell, Edgar S
Description: Report presents results of wind tunnel tests of cambered aerofoils and body-wing combinations used for biplanes. Aerodynamic characteristics including drag, lift-drift ratio and stability derivatives are given.
Contributing Partner: UNT Libraries Government Documents Department
Airplane Stress Analysis

Airplane Stress Analysis

Date: January 1, 1918
Creator: Zahm, A F
Description: Report presents stress analysis of individual components of an airplane. Normal and abnormal loads, sudden loads, simple stresses, indirect simple stresses, resultant unit stress, repetitive and equivalent stress, maximum steady load and stress are considered.
Contributing Partner: UNT Libraries Government Documents Department
Annual report of the National Advisory Committee for Aeronautics (3rd).administrative report including Technical Report nos. 13 to 23

Annual report of the National Advisory Committee for Aeronautics (3rd).administrative report including Technical Report nos. 13 to 23

Date: January 1, 1918
Creator: unknown
Description: Report includes the National Advisory Committee for Aeronautics letter of submittal to the President, Congressional report, summaries of the committee's activities and research accomplished, expenditures, and problems.
Contributing Partner: UNT Libraries Government Documents Department
Experimental research on air propellers

Experimental research on air propellers

Date: January 1, 1918
Creator: Durand, William F
Description: The purposes of the experimental investigation on the performance of air propellers described in this report are as follows: (1) the development of a series of design factors and coefficients drawn from model forms distributed with some regularity over the field of air-propeller design and intended to furnish a basis of check with similar work done in other aerodynamic laboratories, and as a point of departure for the further study of special or individual types and forms; (2) the establishment of a series of experimental values derived from models and intended for later use as a basis for comparison with similar results drawn from certain selected full-sized forms and tested in free flight.
Contributing Partner: UNT Libraries Government Documents Department
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
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 ...
Contributing Partner: UNT Libraries Government Documents Department
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
Description: Report presents the performance of fabrics used for the envelopes of airships.
Contributing Partner: UNT Libraries Government Documents Department
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