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Two-dimensional subsonic compressible flows past arbitrary bodies by the variational method
Instead of solving the nonlinear differential equation which governs the compressible flow, an approximate method of solution by means of the variational method is used. The general problem of steady irrotational flow past an arbitrary body is formulated. Two examples were carried out, namely, the flow past a circular cylinder and the flow past a thin curved surface. The variational method yields results of velocity and pressure distributions which compare excellently with those found by existing methods. These results indicate that the variational method will yield good approximate solution for flow past both thick and thin bodies at both high and low Mach numbers.
Date:
March 1951
Creator:
Wang, Chi-Teh
System:
The UNT Digital Library
Average Outside-Surface Heat-Transfer Coefficients and Velocity Distributions for Heated and Cooled Impulse Turbine Blades in Static Cascades
Heat-transfer investigation conducted on cooled as well heated impulse-type turbine blades in a static cascade to determine the effect of direction of heat flow on convective heat-transfer coefficients.
Date:
March 9, 1951
Creator:
Hubbartt, James E. & Schum, Eugene F.
System:
The UNT Digital Library
The Bernard 120 Seaplane (French): A 1400 hp Single-Seat Monoplane Racer
Circular presenting a description of the Bernard 120, which is a seaplane. Descriptions of the structural elements, engine, and fuel distribution system are provided.
Date:
March 1931
Creator:
Léglise, Pierre
System:
The UNT Digital Library
The Dyle and Bacalan "DB 70" Commercial Airplane (French): An All-Metal High-Wing Monoplane
Report presenting a description of the Dyle and Balaclan DB 70, which is a commercial airplane with a very thick wing. Details of the fuselages, wings, passenger and pilot spaces, ability to function as an ambulance airplane, and flying qualities are provided.
Date:
March 1930
Creator:
unknown
System:
The UNT Digital Library
The Latécoère 521 "Lieutenant De Vaisseau Paris" Commercial Flying Boat (French): A Two-Deck Six-Engine Semicantilever Sesquiplane
Circular presenting a description of the Latécoère 521, which was the largest aircraft built in France at the time. A more detailed description of the wings, hull, accommodation for passengers and officers, fuel system, controls, and flight characteristics is provided.
Date:
March 1936
Creator:
unknown
System:
The UNT Digital Library
Richard-Penhoet Commercial Seaplane
This is a multi-engine monoplane with a central hull and without external bracing. The trim of the seaplane on the water is assured by two wing floats, one on each side of the hull 9 m. from its axis. It has a total power of 2100 HP. from 5 air cooled Jupiter radial engines.
Date:
March 1927
Creator:
unknown
System:
The UNT Digital Library
Vojenska-Smolik S.16 Airplane: All-Metal Long-Distance Observation Bi-Plane
Circular presenting a description of the Vojenska-Smolik all-metal two-seater airplane. The design and flight characteristics are described and blueprints and photographs of the aircraft are provided.
Date:
March 1927
Creator:
unknown
System:
The UNT Digital Library
Ultraviolet spectrochemical analysis for aromatics in aircraft fuels
Report presenting tests to verify and extend ultraviolet spectroscopic techniques for applications to the analysis of aviation fuels for their aromatic constituents. Results regarding photographic absorption spectra, spectrophotometric absorption spectra, and spectrophotometric analyses are provided.
Date:
March 1945
Creator:
Cleaves, Alden P.
System:
The UNT Digital Library
The Boundary Layer as a Means of Controlling the Flow of Liquids and Gases
According to one of the main propositions of the boundary layer theory the scarcely noticeable boundary layer may, under certain conditions, have a decisive influence on the form of the external flow by causing it to separate from the wing surface. These phenomena are known to be caused by a kind of stagnation of the boundary layer at the point of separation. The present report deals with similar phenomena. It is important to note that usually the cause (external interference) directly affects only the layer close to the wall, while its indirect effect extends to a large portion of the external flow.
Date:
March 1930
Creator:
Schrenk, Oskar
System:
The UNT Digital Library
The Short "Calcutta": First British All-Metal Commercial Seaplane
The Calcutta is a large seaplane, with seating for 16 and a payload of 3,400 pounds. A description of the design, construction features, engine installation, specifications, performance, and photographs are provided.
Date:
March 1928
Creator:
unknown
System:
The UNT Digital Library
Nieuport-Delage 640 (French): Commercial High-Wing Monoplane
The Nieuport Delage 640 is a single engine commercial high-wing monoplane of all wood construction, including the fuselage and tail. It's landing gear is hinged in two parts.
Date:
March 1929
Creator:
unknown
System:
The UNT Digital Library
Les Mureaux "130.a2" Observation Airplane (French): A High-Wing Two-Seat Monoplane
Circular presenting Les Mureaux 130.A2, which is a high-wing two-seat observation monoplane. A description of the design, performances, components, performance qualities, photographs, and drawings are provided.
Date:
March 1930
Creator:
Frachet, André
System:
The UNT Digital Library
On the Flow of a Compressible Fluid by the Hodography Method 1: Unification and Extension of Present-Day Results
Report presenting elementary basic solutions of the equations of motion of a compressible fluid in the hodograph variables are developed and used to provide a basis for comparison in the form of velocity correction formulas, of corresponding compressible and incompressible flows.
Date:
March 1944
Creator:
Garrick, I. E. & Kaplan, Carl
System:
The UNT Digital Library
Lioré-Olivier Airplane: Type 12 Night-Bomber or Type 20 Commercial
Report presenting a description of the Lioré-Olivier Type 12 night bomber, which can also be converted into the Type 20 commercial. A description of the cell of the wings, fuselage, power plant, landing gear, and flight characteristics is provided.
Date:
March 1926
Creator:
Serryer, J.
System:
The UNT Digital Library
An Investigation of Aircraft Heaters 9: Measured and Predicted Performance of Two Exhaust Gas-Air Heat Exchangers and an Apparatus for Evaluating Exhaust Gas-Air Heat Exchangers
Report presenting laboratory testing to determine the thermal output and pressure drop characteristics of the Airesearch and Solar fluted-type exhaust gas-air heat exchangers. The apparatus used in these tests consisted of a natural gas furnace of 3,000,000 Btu per hour thermal capacity, a centrifugal blower, and a system of ducting and various measuring devices. Results regarding the method of analysis, the Airesearch heat exchanger tests, the solar heat exchanger tests, and a comparison of the two heat exchangers are provided.
Date:
March 1943
Creator:
Boelter, L. M. K.; Miller, M. A.; Sharp, W. H.; Morrin, E. H.; Iversen, H. W. & Mason, W. E.
System:
The UNT Digital Library
The Bleriot 110 Airplane (French): A Long-Distance High-Wing Monoplane
Circular presenting a description of the Bleriot 110 which is a long-distance airplane mainly distinguished by its fineness and lightness. Details of the fuselage, shape, wing, and power plant are provided.
Date:
March 1931
Creator:
unknown
System:
The UNT Digital Library
The "Latécoère 28" Commercial Airplane (French): A Ten Passenger High-Wing Monoplane
Report presenting a description of the Latécoère 28, a commercial monoplane. A detailed description of the design, flight characteristics, and special features are provided.
Date:
March 1930
Creator:
unknown
System:
The UNT Digital Library
The effect of altitude on cooling
Report presenting variables that control the cooling of liquid-cooled and air-cooled engines and then to show by illustrations how either engine may be cooled at any desired altitude. Cooling was found to not be the limiting factor in the design of high-altitude airplanes and was also not found to be a valid reason for selecting either liquid- or air-cooled engines for high-altitude operation.
Date:
March 1943
Creator:
Brevoort, Maurice J.; Joyner, Upshur T. & Wood, George P.
System:
The UNT Digital Library
Boulton Paul P.71a Commercial Airplane (British): A Two-Engine Biplane
Circular presenting a description of the Boulton Paul P.71A, which is a new type of two-engine biplane. Details of the design, fuel tanks, materials, fuselage, passenger seating, tail, and flying qualities are provided.
Date:
March 1935
Creator:
unknown
System:
The UNT Digital Library
The Wibault 280 T.10 Commercial Airplane (French): An All-Metal, Cantilever, Low-Wing Monoplane
Circular presenting a description of the Wibault 280 T.10, which is an all-metal cantilever low-wing monoplane. The flight characteristics, design, blueprints, and photographs are provided.
Date:
March 1931
Creator:
Frachet, André
System:
The UNT Digital Library
Polish P Type Single-Seat Fighters: All-Metal Gull-Type Wing Monoplanes
Circular describing the Polish P.I and P.VIII airplanes, which are both all-metal gull-type wing monoplanes that differ in the type of engine used, their wing area, and their landing gears. Details of the components, design, differences, characteristics, load distribution, performance, drawings, and photographs are provided.
Date:
March 1931
Creator:
unknown
System:
The UNT Digital Library
The Avro "Anson" General-Purpose Airplane (British): A Two-Engine Low-Wing Cantilever Monoplane
Circular describing the Avro Anson, which is a two-engine low-wing cantilever monoplane of the general-purpose type. Details regarding the wing, landing gear, controls, fuselage, pilot's equipment, power plant, armament, characteristics, performance, drawings, and photographs are provided.
Date:
March 1936
Creator:
unknown
System:
The UNT Digital Library
A Theoretical Investigation of the Lateral Oscillations of an Airplane With Free Rudder With Special Reference to the Effect of Friction
Report presenting charts showing the variation in dynamic stability with the rudder hinge-moment characteristics. A stabilizing rudder floating tendency combined with a high degree of aerodynamic balance is shown to lead to oscillations of increasing amplitude.
Date:
March 1943
Creator:
Greenberg, Harry & Sternfield, Leonard
System:
The UNT Digital Library
Savoia Seaplane S.55: Military or Commercial
The S.55 is a two engine twin hull seaplane built by Societa Idrovolanti Alta Italia (Seaplane Company of Upper Italy). The S.55 (Santa Maria) is to be used for an around the world flight In 1927. It will have a useful load of 7,500 lbs. and a cruising speed of 100 MPH.
Date:
March 1927
Creator:
unknown
System:
The UNT Digital Library