Computation of Cantilever Airplane Wings (open access)

Computation of Cantilever Airplane Wings

The purpose of this treatise is, first of all, the determination of the effect of variously loaded spars on one another, since the neglect of this effect would present an economically very unfavorable computation method. The system of spars and cross-bars alone (whether solid or built-up) does not matter at first, the original assumption being that the spars are rigidly braced by the cross-bars.
Date: July 1925
Creator: Thalau, K.
Object Type: Report
System: The UNT Digital Library
Fitting, showing, and judging hogs. (open access)

Fitting, showing, and judging hogs.

Provides suggestions for selecting and preparing swine for livestock shows and fairs. Describes judging criteria.
Date: July 1925
Creator: Russell, E. Z. (Ellsworth Zouave), 1866-
Object Type: Book
System: The UNT Digital Library
Increasing the Power of Internal Combustion Engines (open access)

Increasing the Power of Internal Combustion Engines

This report presents various methods for increasing the power of engines such as supercharging and turbocharging.
Date: July 1925
Creator: Prayer, Georg
Object Type: Report
System: The UNT Digital Library
Recent experiments at the Gottingen Aerodynamic Institute (open access)

Recent experiments at the Gottingen Aerodynamic Institute

This report presents the results of various experiments carried out at the Gottingen Aerodynamic Institute. These include: experiments with Joukowski wing profiles; experiments on an airplane model with a built-in motor and functioning propeller; and the rotating cylinder (Magnus Effect).
Date: July 1925
Creator: Ackeret, J.
Object Type: Report
System: The UNT Digital Library
Relation Of "Lilienthal Effect" to Dynamic Soaring Flight (open access)

Relation Of "Lilienthal Effect" to Dynamic Soaring Flight

"In this article, the phenomena of the upward component in the case of flat surfaces will be referred to as the "Lilienthal effect." The Lilienthal effect will be distinguished from the Knoller-Betz effect which is explained by means of vertical wind oscillations, at the basis of which, however, there lie air motions which the Lilienthal effect could not produce. It will be shown that the same cause, which can produce the Lilienthal effect on flat airfoils, considerably strengthens the thrust due to the Knoller-Betz effect" (p. 1).
Date: July 1925
Creator: Fick, Roderich
Object Type: Report
System: The UNT Digital Library