In Partnership With

June 1, 1917

Course in Aerodynamics and Airplane Design

Flotation of Pontoons and the Determination of Pontoon Position

Aeronautical Specifications No. 1003

398399

Course in Aerodynamics and Airplane Design

General Principles of Chassis Design

392393

Flotation of Pontoons and the Determination of Pontoon Position

Consider an airplane, of total weight W, supported by two pontoons. Then W/2= weight supported by each pontoon, and W/2ρ = volume of water displaced by each pontoon, where ρ is the density of the fluid displaced. The weight of the machine and the buoyancy of the pontoons are necessarily equal in magnitude.

404405

Aeronautical Specifications No. 1003

This specification describes the design, construction, equipment and requirements of a military airplane adapted to overland flying, combat, and pursuit of hostile aircraft. General Requirements The following characteristics shall be proven to the satisfaction of inspectors appointed by the Government for that parpose : (1) This airplane shall be a one-place tractor, with one body and shall be equipped with one engine and one propeller.
402403

Gasoline

Gasoline is the term applied to the lighter portions usually obtained by distilling crude petroleum. It was originally given to the distillate lighter than SO deg. (0.666 sp.gr.) on the Baumé scale. This particular variety was seldom used for power production.

394395

Air Resistance of Cylinder Combinations*

During the past year Messrs. T. Wong and T. Yu conducted the following investigation to determine the shielding effect of certain tandem wire or cylinder combination commonly met in airplane trussing. The work was supervised by Dr. Hunsaker at the Aerodynamical Laboratory of the Massachusetts Institute of Technology.

402403

Insurance for Aviators*

The National Advisory Committee for Aeronautics has endeavored to interest a number of life and accident insurance company's in the subject of insurance for aviators. At first, only the more prominent companies were approached on the matter.
390391

Editorial

Editorial

396397

Book Review

394395

Answers to Correspondents

O’GORMAN’S REPORT ON DIRIGIBLE SHAPES

404405

The DN-1 Passes Government Tests

May 151917 June 151917