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Aerial photography : obtaining a true perspective
Report discussing a demonstration was given within the last few days at the British Museum by Mr. J. W. Gordon, author of "Generalized Linear Perspective" (Constable and Co.), a work describing a newly-worked-out system by which photographs can be made available for the purpose of exactly recording the dimensions of the objects photographed even when the objects themselves are presented foreshortened in the photograph.
Date:
April 1923
Creator:
United States. National Advisory Committee for Aeronautics.
System:
The UNT Digital Library
My Experience With Helicopters
The author recounts his experiments with helicopters. The object of his investigations was to remain stationary in the air for five minutes and to make a closed flight at low altitude. Some of the topics discussed include stabilization, horizontal flight, and directional control.
Date:
April 1923
Creator:
Oemichen, Etienne
System:
The UNT Digital Library
The New Interpretation of the Laws of Air Resistance
A closer examination of Newton's formula for air resistance shows that it is well to consider the air as an ordinary fluid, and, indeed for most of the velocities considered, as a non-compressible fluid, so long as the dimensions of the moving body are large in comparison with the mean free path of the particles of air.
Date:
April 1923
Creator:
Prandtl, L.
System:
The UNT Digital Library
Safety Factors in Aviation
A formula for calculating the safety of airplanes is given and the stresses on airplane components are calculated. Some questions regarding the information obtained from the formula and its application to safe airplane design for pilots are provided.
Date:
April 1923
Creator:
Bleriot, Louis
System:
The UNT Digital Library
Wind-Driven Propellers (Or "Windmills")
Wind-driven propellers are much used as sources of power for equipment such as radios. This report establishes the principles involved and acquaints the reader with rules for design of such windmills.
Date:
April 1923
Creator:
Munk, Max M.
System:
The UNT Digital Library
Wind Tunnel of Zeppelin Airship Company
This report discusses the general considerations for the design of aerodynamic laboratories. The dimensions, construction, and components of the wind tunnel are given special attention.
Date:
April 1923
Creator:
Munk, Max M.
System:
The UNT Digital Library