Engineering topics

Wolff, E B

Publications and source records attributed to Wolff, E B.

6 records

NASA NTRS1928

Mechanical properties of some materials used in airplane construction

Since lightness is desirable in airplane construction, greater stresses must be tolerated than in other kinds of construction. It is therefore necessary to have a more accurate knowledge of the greatest stresses that may occur and of the actual properties of the materials used. The Aeronautic Research Laboratories took the limit of elasticity as the basis of the strength calculations. Many tests were made of different steels, woods, aluminum alloys, and fabrics.

MATERIALS - STRENGTH↗

NASA NTRS1927

Discussion of the results of the boundary-layer tests of an airfoil fitted with a rotary cylinder

The results of the velocity measurements in the boundary layer described in NACA-TM 411 are here discussed in greater detail. The measurements made were of the velocity distribution in the vicinity of an airfoil model fitted with a rotary cylinder and were undertaken for the purpose of obtaining a closer insight into the phenomena observed in experimenting with this model.

AIRFOILS↗

NASA NTRS1926

Tests for determining the effect of a rotating cylinder fitted into the leading edge of an airplane wing

Experiments were performed with a wing model, to which a rotary cylinder had been fitted. The rotation of the cylinder had a remarkable effect on the aerodynamic properties of the wing.

CYLINDERS, ROTATING↗

NASA NTRS1926

Protection of wooden airplane parts against moisture by means of varnish

The objects of the experiments herein described were to test the protection afforded by Valspar oil varnish against the absorption of moisture by wooden airplane parts and the consequent changes in their elastic properties and to compare some of the best Dutch varnishes with Valspar.

PAINTS & VARNISHES↗

NASA NTRS1925

Preliminary investigation of the effect of a rotating cylinder in a wing

Into the leading edge of a wing with arbitrary cross-section, there is introduced a cylinder, which can be rotated by an electric motor by means of a cord. Observations were made in the wind tunnel on how the lift at different wind velocities was affected by rotating this cylinder.

AERODYNAMICS - WIND PROPULSION↗

NASA NTRS1923

Standardization and aerodynamics

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Knight, William↗