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The A. B. Flygindustri "K 37" (Swedish Junkers): A Low-Wing All-Metal Military Airplane

Description: Report discusses the characteristics of the K 37 all-metal long-wing monoplane and its use for long-distance scouting, as a day bomber, and as a heavy fighting airplane. Its engines, climbing capacity, action radius, bombing installation, fuselage, controls, and landing gear are explored in depth.
Date: October 1929
Creator: United States. National Advisory Committee for Aeronautics.
Item Type: Refine your search to only Report
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The Drag and Interference of a Nacelle in the Presence of a Wing

Description: A wing interference investigation was conducted to determine why the N.A.C.A. cowling did not yield the expected increase in speed when adapted to the outboard nacelles of trimotored airplanes. The results indicate that the drag and interference of the engine nacelle with the cowling, when combined with a thick wing, can be reduced from its value as originally applied by changing its position and fairing it into the wing.
Date: October 1929
Creator: Jacobs, Eastman N.
Item Type: Refine your search to only Report
open access

Handley Page Metal Construction

Description: In this report Handley Page construction techniques are shown such as: solid-drawn tubular duralumin spars are used in the stabilizer; plain channel sections are used extensively for minor components; and the manner of assembling them into a stabilizer compression strut is shown.
Date: October 1929
Item Type: Refine your search to only Report
open access

The Impact on Seaplane Floats During Landing

Description: "In order to make a stress analysis of seaplane floats, and especially of the members connecting the floats with the fuselage, it is of great importance to determine the maximum pressure acting on the floats during landing. Here, the author gives a formula for maximum pressures during landing that permits one to apply experimental results to different bodies and different velocities. The author notes that the formula checks very well with experimental results" (p. 1).
Date: October 1929
Creator: von Karman, T.
Item Type: Refine your search to only Report
open access

Wind tunnel pressure distribution tests on a series of biplane wing models Part II: effects of changes in decalage, dihedral, sweepback and overhang

Description: This preliminary report furnishes information on the changes in the forces on each wing of a biplane cellule when the decalage, dihedral, sweepback and overhang are separately varied. The data were obtained from pressure distribution tests made in the Atmospheric Wind Tunnel of the Langley Memorial Aeronautical Laboratory. Since each test was carried up to 90 degree angle of attack, the results may be used in the study of stalled flight and of spinning and in the structural design of biplane wi… more
Date: October 1929
Creator: Knight, Montgomery & Noyes, Richard W.
Item Type: Refine your search to only Report
open access

Wind Tunnel Pressure Distribution Tests on an Airfoil With Trailing Edge Flap

Description: "This report deals with pressure distribution tests on an airfoil with a conventional trailing edge flap. These tests were conducted in the Atmospheric Wind Tunnel of the National Advisory Committee for Aeronautics. Maximum chord loadings were obtained with the flap displaced downward and with the airfoil at large angles of attack. Greater changes were produced in the normal force and in the center of pressure travel by up-flap than by an equal down-flap displacement" (p. 1).
Date: October 1929
Creator: Wenzinger, Carl J. & Loeser, Oscar, Jr.
Item Type: Refine your search to only Report
open access

Wind Tunnel Tests on Airfoil Boundary Control Using a Backward Opening Slot (1929)

Description: "This report presents the results of an investigation to determine the effect of boundary layer control on the lift and drag of an airfoil equipped with a backward opening slot. Various slot locations, widths of opening, and pressures, were used. The tests were conducted in the Five-Foot Atmospheric Wind Tunnel of the Langley Memorial Aeronautical Laboratory" (p. 1).
Date: October 1929
Creator: Knight, Montgomery & Bamber, Millard J.
Item Type: Refine your search to only Report
open access

Wind Tunnel Tests on an Airfoil Equipped With a Split Flap and a Slot

Description: "The investigation described in this report is concerned with the changes in the aerodynamic characteristics of an airfoil which are produced by a gauze-covered suction slot, located near the leading edge, and connected by an air passage to a split flap at the trailing edge. The tests were conducted at the Langley Memorial Aeronautical Laboratory. At the larger values of lift coefficient where the action of the slot might be expected to be most effective, the pressure differences were such that… more
Date: October 1929
Creator: Bamber, Millard J.
Item Type: Refine your search to only Report
open access

The Fairey III.F (British): A General Purpose Biplane

Description: Circular describing the Fairey III.F, which is a general-purpose biplane created by the Fairey Aviation Company to serve as a fighter, bomber, reconnaissance, ambulance, passenger, or long-range airplane. Details of the structure, power plant, wings, tail, landing gear, cockpits, controls, corrosion proofing, instruments, radio, armament, drawings, and photographs are provided.
Date: September 1929
Item Type: Refine your search to only Report
open access

Tests of Four Racing Type Airfoils in the Twenty-Foot Propeller Research Tunnel

Description: Tests were made on four racing type airfoils, the N-9, N-38, C-62, and N-46, in order to determine the high speed characteristics of the wings. The results indicate that the N-46 has about 12 percent lower minimum drag than the regular C-62 section, and that both the N-38 and N-46 have the same exceptionally low minimum drag coefficient.
Date: September 1929
Creator: Weick, Fred E.
Item Type: Refine your search to only Report
open access

Travel of the Center of Pressure of Airfoils Transversely to the Air Stream

Description: The experiments here described were performed for the purpose of obtaining the essential facts concerning the distribution of the air force along the span. We did not follow, however, the time-consuming method of point-to-point measurements of the pressure distribution on the wing surfaces, but determined directly the moment of mean force about an axis passing through the middle of the span parallel to the direction of flight.
Date: September 1929
Creator: Katzmayr, Richard
Item Type: Refine your search to only Report
open access

Viscosity of diesel engine fuel oil under pressure

Description: In the development of Diesel engine fuel injection systems it is necessary to have an approximate knowledge of the absolute viscosity of the fuel oil under high hydrostatic pressures. This report presents the results of experimental tests conducted by Mr. Jackson Newton Shore, utilizing the A.S.M.E. high pressure equipment.
Date: September 1929
Creator: Hersey, Mayo D.
Item Type: Refine your search to only Report
open access

Welding of Stainless Materials

Description: "It would appear that welds in some stainless steels, heat-treated in some practicable way, will probably be found to have all the resistance to corrosion that is required for aircraft. Certainly these structures are not subjected to the severe conditions that are found in chemical plants. This article should be considered as an outline of what can be done, not necessarily as instructions, which will enable anyone to obtain satisfactory results in commercial work" (p. 1).
Date: September 1929
Creator: Bull, H. & Johnson, Lawrence
Item Type: Refine your search to only Report
open access

Welding Rustproof Steels

Description: The following experimental results will perhaps increase the knowledge of the process of welding rustproof steels. The experiments were made with two chrome-steel sheets and with two chrome-steel-nickel sheets having the composition shown in Table I.
Date: September 1929
Creator: Hoffmann, W.
Item Type: Refine your search to only Report
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