Resource Type
Collection
Serial/Series Title
NACA Technical Memorandums
44
NACA Technical Notes
31
NACA Aircraft Circulars
11
Farmers' bulletin (United States. Dept. of Agriculture)
5
NACA Technical Reports
4
United States Bureau of Mines Reports
4
Farmers' bulletin (United States. Department of Agriculture)
2
Leaflet (United States. Department of Agriculture)
2
National Bureau of Standards Reports
2
North American Fauna
2
9 More
Country
202 Matching Results
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Ignition Points and Combustion Reactions in Diesel Engines: Part 2
Ignition point measurement and ignition point test equipment is examined in relation to diesel engine reactions.
Date:
October 1928
Creator:
Tausz, J. & Schulte, F.
Object Type:
Report
System:
The UNT Digital Library
Effect of variation of chord and span of ailerons on rolling and yawing moments at several angles of pitch
This report presents the results of an extension to higher angles of attack of the investigation of the rolling and yawing moments due to ailerons of various chords and spans on two airfoils having the Clark Y and U. S. A. 27 wings. The measurements were made at various angles of pitch but at zero angle of roll and yaw, the wing chord being set at an angle of +4 degrees to the fuselage axis. In the case of the Clark Y airfoil the measurements have been extended to a pitch angle of 40 degrees, using ailerons of span equal to 67 per cent of the wing semispan and chord equal to 20 and 30 per cent of the wing chord. The work was conducted on wing models of 60-inch span and 10-inch chord.
Date:
October 7, 1929
Creator:
Heald, R. H.; Strother, D. H. & Monish, B. H.
Object Type:
Report
System:
The UNT Digital Library
Large-scale aerodynamic characteristics of airfoils as tested in the variable density wind tunnel
From Summary: "In order to give the large-scale characteristics of a variety of airfoils in a form which will be of maximum value, both for airplane design and for the study of airfoil characteristics, a collection has been made of the results of airfoil tests made at full-scale values of the Reynolds number in the variable density wind tunnel of the National Advisory Committee for Aeronautics. They have been corrected for tunnel wall interference and are presented not only in the conventional form but also in a form which facilitates the comparison of airfoils and from which corrections may be easily made to any aspect ratio. An example showing the method of correcting the results to a desired aspect ratio has been given for the convenience of designers. In addition, the data have been analyzed with a view to finding the variation of the aerodynamic characteristics of airfoils with their thickness and camber."
Date:
October 21, 1929
Creator:
Jacobs, Eastman N. & Anderson, Raymond F.
Object Type:
Report
System:
The UNT Digital Library
Drag and Cooling With Various Forms of Cowling for A "Whirlwind" Radial Air-Cooled Engine - 1
"This report presents the results of an investigation undertaken in the 20-foot Propeller Research Tunnel at Langley Field on the cowling of radial air-cooled engines. A portion of the investigation has been completed, in which several forms and degrees of cowling were tested on Wright "Whirlwind" J-5 engine mounted in the nose of a cabin fuselage. The cowlings varied from the one extreme of an entirely exposed engine to the other in which the engine was entirely inclosed. Cooling tests were made and each cowling modified, if necessary, until the engine cooled approximately as satisfactorily as when it was entirely exposed" (p. 165).
Date:
October 5, 1928
Creator:
Weick, Fred E.
Object Type:
Report
System:
The UNT Digital Library
Pressure Distribution Over a Rectangular Monoplane Wing Model Up to 90 Degree Angle of Attack
"The pressure distribution tests described in this report, covering angles of attack up to 90 degrees, were made on a rectangular monoplane wing model in the atmospheric wind tunnel of the Langley Memorial Aeronautical Laboratory. These tests indicate that a rectangular wing, by reason of its large tip loads, is uneconomical aerodynamically and structurally, has pronounced lateral instability above maximum lift, and is not adaptable to accurate calculation based on the classical wing theory" (p. 197).
Date:
October 27, 1927
Creator:
Knight, Montgomery & Loeser, Oscar, Jr.
Object Type:
Report
System:
The UNT Digital Library
Slotted-Wing Airplanes
Different applications of the slotted-wing principle are discussed as well as the advantages of using them. Slotted-wings are provided as a promising solution to the problem of needing to increase flight speed for aircraft while also decreasing landing speed.
Date:
October 1927
Creator:
Everling, E.
Object Type:
Report
System:
The UNT Digital Library
Glider Construction and Design
The endeavor to draw a strict line between gliders and soarers as been recently abandoned and the following classification adopted: 1) gliders controlled by shifting the weight of the body; 2) gliders controlled by rudders; 3) gliders controlled by wings. The different classes are discussed as well as materials and parts used in construction.
Date:
October 1927
Creator:
Gymnich, Alfried
Object Type:
Report
System:
The UNT Digital Library
Ignition and Combustion Phenomena in Diesel Engines
Evidences were found that neither gasification nor vaporization of the injected fuel occurs before ignition; also that the hydrogen coefficient has no significance. However the knowledge of the ignition point and of the "time lag" is important. After ignition, the combustion proceeds in a series of reactions, the last of which at least are now known.
Date:
October 1928
Creator:
Sass, F.
Object Type:
Report
System:
The UNT Digital Library
Research on the Control of Airplanes
Our task is to endeavor to obtain precise experimental records of the motion of stalled airplanes, both when left to themselves and when the pilot is trying to control them. The apparatus which we use consists of a box containing tree gyroscopes which are slightly deflected against a spring control when the airplane is turning.
Date:
October 1928
Creator:
Jones, B. Melvill
Object Type:
Report
System:
The UNT Digital Library
Experiments With a Wing Model From Which the Boundary Is Removed by Suction
The present report deals with a series of tests made for the purpose of improving flow conditions about wings by applying the suction principle (increase of the lift coefficient and reduction of the drag about very thick wing sections). Though not conclusive, the report contains interesting results.
Date:
October 1929
Creator:
Schrenk, Oskar
Object Type:
Report
System:
The UNT Digital Library
Tank tests of twin seaplane floats
The following report contains the most essential data for the hydrodynamic portion of the twin-float problem. The following points were successfully investigated: 1) difference between stationary and nonstationary flow; 2) effect of the shape of the step; 3) effect of distance between floats; 4) effect of nose-heavy and tail-heavy moments; 5) effect of the shape of floats; 6) maneuverability.
Date:
October 1928
Creator:
Herrmann, H.; Kempf, G. & Kloess, H.
Object Type:
Report
System:
The UNT Digital Library
Report on the Agricultural Experiment Stations, 1927
Volume provides a summary of the progress of each agricultural experiment station. Also includes statistics, a bibliography of experiment station publications, and selected studies.
Date:
October 31, 1928
Creator:
United States. Office of Experiment Stations.
Object Type:
Book
System:
The UNT Digital Library
Report on the Agricultural Experiment Stations, 1925
Volume provides a summary of the progress of each agricultural experiment station. Also includes statistics, discussions of foreign investigations, and selected studies.
Date:
October 1926
Creator:
United States. Office of Experiment Stations.
Object Type:
Book
System:
The UNT Digital Library
A Biological Survey of Alabama
Booklet describing the biology of Alabama in two sections: (1) physiography and life zones, and (2) mammals. It also includes an annotated species list of mammals, bibliography, and index starting on page 81.
Date:
October 28, 1921
Creator:
Howell, Arthur H.
Object Type:
Report
System:
The UNT Digital Library
Attachment for Lister-Cultivators
Patent for improvements in attachments to lister-cultivators. Illustration is included.
Date:
October 12, 1920
Creator:
Degge, Marvin E.
Object Type:
Patent
System:
The Portal to Texas History
Battery-Terminal-Fastening Device
Patent for improvements to battery terminal fastening devices. Illustration is included.
Date:
October 12, 1920
Creator:
Hawkins, Alda F.
Object Type:
Patent
System:
The Portal to Texas History
Check-Book
Patent for a foldable check book. Illustration is included.
Date:
October 5, 1920
Creator:
Exline, Marcus P.
Object Type:
Patent
System:
The Portal to Texas History
Aeroplane-Kite.
Patent for a new aeroplane-kite which can be "readily dismantled and folded for shipping and easily assembled and placed in position for flying without the use of numerous fastenings and detachable parts, thereby making for simplicity and practicability" (lines 12-17). Also includes wind tunnels and a fuselage frame which is so easily assembled that a child can do it.
Date:
October 19, 1920
Creator:
McLaughlin, James T.
Object Type:
Patent
System:
The Portal to Texas History
Air-Pump.
Patent for a new and improved air pump capable of releasing air from the cylindrical casing in one motion. The updated design will also eliminate any lubricating oil from leaking into a tire.
Date:
October 19, 1920
Creator:
Lawley, Ira
Object Type:
Patent
System:
The Portal to Texas History
N.A.C.A. Recording Air Speed Meter
A new type of air speed meter is described which was designed by the technical staff of the National Advisory Committee for Aeronautics. The instrument consists essentially of a tight metal diaphragm of high natural period which is acted upon by the pressure difference of a pitot-static head. The resulting deflection of this diaphragm is recorded optically on a moving film.
Date:
October 1921
Creator:
Norton, F. H.
Object Type:
Report
System:
The UNT Digital Library
Patent of Invention--Gr 5--Cl.3--Bearing
The object of this invention is a bearing: a thrust bearing. This bearing is one in which the bearing faces is a continuous annular surface and the other an annular surface divided into shoes having the form of sectors.
Date:
October 28, 1925
Creator:
Fulpius, Edward
Object Type:
Report
System:
The UNT Digital Library
The Lytton Springs Oil Field
Report published in a scientific bulletin, describing the Lytton Springs oil fields.
Date:
October 15, 1925
Creator:
Bybee, H. P. & Short, R. T.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Geology and Mineral Resources of McLennan County
Report published in a scientific bulletin, describing the geology and mineral resources that reside in McLennan county.
Date:
October 23, 1923
Creator:
Adkins, W. S.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
List of State Registered Cotton Seed Breeders and State Certified Cotton Seed Growers
Agriculture bulletin discussing the registration and certified laws for cotton seeds.
Date:
1928-10-01/1928-10-30
Creator:
Humbert, E. P.; McDonald, R. E.; Farris, W. D. & Del Curto, J. M.
Object Type:
Book
System:
The Portal to Texas History