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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 181 records · Page 10
All sourcesNASA NTRSDOE OSTI
NASA NTRS1926

Recent developments in the construction and operation of all-metal airplanes

Experiments on the effect of atmosphere and of sea water on the building materials employed by us have been carried on for years in the North Sea with the aid of the Hamburg Naval Observatory. Parallel experiments are being made at the Pisa Naval Observatory in the Mediterranean Sea. Metal sheets, sections, assemblies and experimental floats are being exposed to the action of the elements. Different construction techniques are discussed and a variety of specific airplanes are presented which incorporate some of the new thinking.

METAL AIRPLANE CONSTRUCTION - DORNIER (GER)↗
NASA NTRS1928

The Sikorsky Twin Engined Amphibian, Type S-38, Model 1928

The S-38, model 28 is a nine passenger Sesquiplane powered by two Pratt and Whitney Wasp 410 HP engines and is intended for routes where the ability to take off and land from both land and water is essential.

SEAPLANES - SIKORSKY S-38 (AMER )↗
NASA NTRS1929

Fluttering of the Tail Surfaces of an Airplane and the Means for Its Prevention

The present article, which constitutes a continuation of the work of Von Baumhauer and Konig, will therefore be restricted to the fluttering of the tail surfaces and especially to oscillations of the horizontal empennage. This will also illustrate the characteristics of all other phenomena of fluttering.

TAIL FLUTTER - CAUSES & PREVENTION↗
NASA NTRS1942

The Porpoising Characteristics of a Planing Surface Representing the Forebody of a Flying-Boat Hull

Porpoising characteristics were observed on V-body fitted with tail surfaces for different combinations of load, speed, moment of inertia, location of pivot, elevator setting, and tail area. A critical trim was found which was unaltered by elevator setting or tail area. Critical trim was lowered by moving pivot either forward or down or increasing radius or gyration. Increase in mass and moment of inertia increased amplitude of oscillations. Complete results are tabulated and shown graphically.

HULL BOTTOMS, VEE↗