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Dornier "Superwal" commercial seaplane with : two Rolls-Royce "Condor" 600 HP. engines

Dornier "Superwal" commercial seaplane with : two Rolls-Royce "Condor" 600 HP. engines

Date: February 1, 1927
Creator: unknown
Description: In November 1926, an exhibition flight of the Dornier giant flying boat was made for 3/4 of an hour. It was a larger version of the Dornier Wal, with a stepped hull, and wing stubs for lateral stability. It has a range of 1200 miles and is outfitted for baggage and 8 passengers.
Contributing Partner: UNT Libraries Government Documents Department
Duralumin welding

Duralumin welding

Date: February 1, 1927
Creator: Nelson, WM
Description: Gas and electric welding of duralumin are discussed.
Contributing Partner: UNT Libraries Government Documents Department
High-speed oil engines for vehicles. Part I

High-speed oil engines for vehicles. Part I

Date: February 1, 1927
Creator: Hausfelder, Ludwig
Description: Different engines are tested to determine their efficiencies in burning fuel. Fuel injection and ignition chamber engines are also discussed.
Contributing Partner: UNT Libraries Government Documents Department
On the mutual reaction of wings and body

On the mutual reaction of wings and body

Date: February 1, 1927
Creator: Lennertz, J
Description: At the suggestion of Professor Von Karman, I have made a few theoretical investigations of the mutual reaction of the wings and body of an airplane. There was assumed as the basis of my calculations, a strongly idealized body shape, namely, a cylinder extended to infinity at both ends and having its axis parallel to the direction of motion of the airplane. The results are to be regarded as rough approximations for a long airplane body and also for an airship with fins. In my calculations, I have considered only a monoplane in which the axis of the wing is rectilinear.
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
Acid Processes for the Extraction of Alumina

Acid Processes for the Extraction of Alumina

Date: 1927
Creator: Tilley, George S.; Millar, Russell Ward & Ralston, Oliver Caldwell
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Aerodynamic characteristics of airfoils IV : continuation of reports nos. 93, 124, and 182

Aerodynamic characteristics of airfoils IV : continuation of reports nos. 93, 124, and 182

Date: January 1, 1927
Creator: unknown
Description: This collection of data on airfoils has been made from the published reports of a number of the leading Aerodynamic Laboratories of this country and Europe. The information which was originally expressed according to the different customs of the several laboratories is here presented in a uniform series of charts and tables suitable for the use of designing engineers and for purposes of general reference. The authority for the results here presented is given as the name of the laboratory at which the experiments were conducted, with the size of the model, wind velocity, and year of test.
Contributing Partner: UNT Libraries Government Documents Department
The aerodynamic characteristics of seven frequently used wing sections at full Reynolds number

The aerodynamic characteristics of seven frequently used wing sections at full Reynolds number

Date: January 1, 1927
Creator: Munk, Max M
Description: This report contains the aerodynamic properties of the wing sections U.S.A. 5, U.S.A. 27, U.S.A. 35 A, U.S.A. 35 B, Clark Y, R.A.F. 15, and Gottingen 387, as determined at various Reynolds numbers up to an approximately full scale value in the variable density wind tunnel of the National Advisory Committee for Aeronautics. It is shown that the characteristics of the wings investigated are affected greatly and in a somewhat erratic manner by variation of the Reynolds number. In general there is a small increase in maximum lift and an appreciable decrease in drag at all lifts.
Contributing Partner: UNT Libraries Government Documents Department
The air forces on a systematic series of biplane and triplane cellule models

The air forces on a systematic series of biplane and triplane cellule models

Date: January 1, 1927
Creator: Munk, Max M
Description: The air forces on a systematic series of biplane and triplane cellule models are the subject of this report. The test consist in the determination of the lift, drag, and moment of each individual airfoil in each cellule, mostly with the same wing section. The magnitude of the gap and of the stagger is systematically varied; not, however, the decalage, which is zero throughout the tests. Certain check tests with a second wing section make the tests more complete and conclusions more convincing. The results give evidence that the present army and navy specifications for the relative lifts of biplanes are good. They furnish material for improving such specifications for the relative lifts of triplanes. A larger number of factors can now be prescribed to take care of different cases.
Contributing Partner: UNT Libraries Government Documents Department
Annual report for the National Advisory Committee for Aeronautics (12th).administrative report including Technical Reports nos. 233 to 256

Annual report for the National Advisory Committee for Aeronautics (12th).administrative report including Technical Reports nos. 233 to 256

Date: January 1, 1927
Creator: unknown
Description: Report includes the National Advisory Committee for Aeronautics letter of submittal to the president, congressional report, summaries of the committee's activities and research accomplished, bibliographies, and financial report.
Contributing Partner: UNT Libraries Government Documents Department