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  Partner: UNT Libraries Government Documents Department
 Decade: 1920-1929
 Collection: National Advisory Committee for Aeronautics Collection
Vorticism in aeronautics

Vorticism in aeronautics

Date: August 1, 1923
Creator: Sayers, W H
Description: Since the war there has been a considerable advance in knowledge on the subject of the airfoil and its behavior. The theory is now sufficiently advanced to make it possible to predict and to calculate certain results which previously could only be attained by direct experiment. The vortex theory receives special attention.
Contributing Partner: UNT Libraries Government Documents Department
Researches on ailerons and especially on the test loads to which they should be subjected

Researches on ailerons and especially on the test loads to which they should be subjected

Date: February 1, 1927
Creator: Sabatier, J
Description: Aileron calculations have hitherto given greatly differing results according to different authors. It seems to be the general opinion that it is only necessary to give the ailerons such dimensions that the airplane can maneuver well, that the stresses they must undergo are relatively small, and that they are strong enough if their framework is of the order of strength as the wings to which they are attached. This article will show that the problem is really quite complex and that it should receive more attention.
Contributing Partner: UNT Libraries Government Documents Department
Determining the velocity distribution in the boundary layer of an airfoil fitted with a rotary cylinder

Determining the velocity distribution in the boundary layer of an airfoil fitted with a rotary cylinder

Date: May 1, 1927
Creator: Van Der Hegge Zijnen, B G
Description: In the closer investigation of the results obtained from a wing model with a rotary cylinder mounted in its leading edge (NACA TM's 307 and 354), the velocity distribution in the vicinity of the surface of the model was determined by a hot-wire anemometer. The results confirmed the belief that the rotary cylinder had considerable effect on the air flow, but demonstrated the fact that the direct influence of the cylinder is confined to a very thin layer in immediate proximity to the surface.
Contributing Partner: UNT Libraries Government Documents Department
An Introduction to the Laws of Air Resistance of Aerofoils

An Introduction to the Laws of Air Resistance of Aerofoils

Date: January 1, 1920
Creator: De Bothezat, George
Description: Report presents methods of calculating air resistance of airfoils under certain conditions of flow phenomena around the airfoil.
Contributing Partner: UNT Libraries Government Documents Department
Force measurements on airplanes

Force measurements on airplanes

Date: June 1, 1929
Creator: Seewald, F
Description: The most essential phenomena of aircraft should be classified according to their origin and then measured. Information can thus be obtained in a quicker, cheaper, and more reliable way than otherwise would be possible.
Contributing Partner: UNT Libraries Government Documents Department
Longitudinal balancing of airplanes

Longitudinal balancing of airplanes

Date: February 1, 1923
Creator: Eteve, Albert
Description: The object of the present communication is to determine the best method for locating the center of lift of an airplane and to provide a method for making corrections. The method employed is very simple, being based on the positions given the elevator during flights at different speeds.
Contributing Partner: UNT Libraries Government Documents Department
"Schneebeli" and "Birger" silencers

"Schneebeli" and "Birger" silencers

Date: June 1, 1923
Creator: Dollfus, Charles
Description: The Schneebeli silencer is made entirely of soft sheet steel. It is connected with the engine for receiving the exhaust gases, and consists of two parts: the silencer proper and a conical exit. The Birger silencer, made by the Ad Astra Company in Switzerland, is based on the principle of rapid cooling of the exhaust gases.
Contributing Partner: UNT Libraries Government Documents Department
Aeromechanical experimentation (wind tunnel tests)

Aeromechanical experimentation (wind tunnel tests)

Date: April 1, 1929
Creator: Katzmayr, R
Description: The following report endeavors to show that aeromechanical experimentation has become an important aid to theory.
Contributing Partner: UNT Libraries Government Documents Department
Engines and fuels

Engines and fuels

Date: August 1, 1923
Creator: unknown
Description: The report considers the effect on engines of the varying types of fuels now in use. Different types of fuels are examined and the influence of physical characteristics are considered.
Contributing Partner: UNT Libraries Government Documents Department
Aviation spirit - past, present, and future

Aviation spirit - past, present, and future

Date: September 1, 1923
Creator: Dunstan, A E & Thole, F B
Description: The volatile fuel of the high-speed internal combustion engine has, in the past, consisted almost exclusively of the lighter distillates from crude petroleum. Alternative and supplementary fuels are discussed such as: tetraline, dekalin, alcohol, cyclo-hexenes.
Contributing Partner: UNT Libraries Government Documents Department