The A.B.C. "Robin" (British): A Single-Seat Cabin Monoplane (open access)

The A.B.C. "Robin" (British): A Single-Seat Cabin Monoplane

Report discussing the A.B.C. Motors Robin, a single-seat monoplane that was built for pilot comfort, speed, and fuel efficiency. Information about the structural design, dimensions, weight, performance, and rough blueprints is included.
Date: September 1929
Creator: A. B. C. Motors
System: The UNT Digital Library
Notes on the Effect of Surface Distortions on the Drag and Critical Mach Number of Airfoils (open access)

Notes on the Effect of Surface Distortions on the Drag and Critical Mach Number of Airfoils

"The effect of two-dimensional bumps and surface waviness on the pressure distribution over airfoils is considered. It is shown that the results of the analysis may be useful in evaluating the effects of accidental or intended surface distortions on the drag and critical Mach number of airfoils" (p. 1).
Date: September 1943
Creator: Allen, H. Julian
System: The UNT Digital Library
The development and application of high-critical-speed nose inlets (open access)

The development and application of high-critical-speed nose inlets

From Summary: "An analysis of the nose-inlet shapes developed in previous investigations to represent the optimum from the standpoint of critical speed has shown that marked similarity exists between the nondimensional profiles of inlets which have widely different proportions and critical speeds. With the nondimensional similarity of such profiles established, the large differences in the critical speeds of these nose inlets must be a function of their proportions. An investigation was undertaken in the Langley 8-foot high-speed tunnel to establish the effects of nose-inlet proportions on critical Mach number and to develop a rational method for the design of high-critical-speed nose inlets to meet desired requirements."
Date: July 1945
Creator: Baals, Donald D.; Smith, Norman F. & Wright, John B.
System: The UNT Digital Library
NACA Investigation of a Jet-Propulsion System Applicable to Flight (open access)

NACA Investigation of a Jet-Propulsion System Applicable to Flight

"Following a brief history of the NACA investigation of jet-propulsion, a discussion is given of the general investigation and analyses leading to the construction of the jet-propulsion ground-test mock-up. The results of burning experiments and of test measurements designed to allow quantitative flight-performance predictions of the system are presented and correlated with calculations. These calculations are then used to determine the performance of the system on the ground and in the air at various speeds and altitudes under various burning conditions. The application of the system to an experimental airplane is described and some performance predictions for this airplane are made" (p. 1).
Date: April 1944
Creator: Brown, Clinton E.
System: The UNT Digital Library
Avro C.30 Direct-Control Autogiro (British) (open access)

Avro C.30 Direct-Control Autogiro (British)

Circular describing the Avro C.30 direct-control autogiro. Details of the construction, fuselage, engine mounting, tail, cockpits, rotor system, characteristics, performance, drawings, and photographs are provided.
Date: September 1934
Creator: Colson, C. N.
System: The UNT Digital Library
Investigation of the Behavior of Parallel Two-Dimensional Air Jets (open access)

Investigation of the Behavior of Parallel Two-Dimensional Air Jets

Report presenting an investigation made of the flow downstream from a two-dimensional grid, formed of parallel rods. The two-dimensional character of the flow was insured by end plates normal to the rods and covering the entire flow field. The nature of the flow was determined primarily by means of total-head measurements.
Date: November 1944
Creator: Corrsin, Stanley
System: The UNT Digital Library
The Breguet 270 General-Purpose Military Airplane (French): A Two-Seat All-Steel Sesquiplane (open access)

The Breguet 270 General-Purpose Military Airplane (French): A Two-Seat All-Steel Sesquiplane

Circular presenting a description of the Breguet 270 general-purpose military airplane, which is a two-set, all-steel sesquiplane. Details regarding the basic principles of design, construction, components, flying qualities, drawings, and photographs are provided.
Date: September 1930
Creator: De Marolles, R. J.
System: The UNT Digital Library
The Dornier "Do.X" Flying Boat (German) : A Giant High-Wing Monoplane (open access)

The Dornier "Do.X" Flying Boat (German) : A Giant High-Wing Monoplane

Circular presenting a description of the Dornier Do.X flying boat. Details are provided regarding the structural details, flying qualities, and photographs.
Date: February 1930
Creator: Dornier, Claude
System: The UNT Digital Library
The Morane Sauliner 222 Airplane (French): A Single-Seat Pursuit Monoplane (open access)

The Morane Sauliner 222 Airplane (French): A Single-Seat Pursuit Monoplane

Circular presenting the Morane Saulnier 222 airplane, which is a single-seat pursuit monoplane. A description of the components, design, characteristics, performance, photographs, and drawings are provided.
Date: December 1929
Creator: Frachet, André
System: The UNT Digital Library
Les Mureaux "130.a2" Observation Airplane (French): A High-Wing Two-Seat Monoplane (open access)

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
The S.A.B.C.A. "S.XI" Commercial Airplane (Belgian): A High-Wing Semicantilever Monoplane (open access)

The S.A.B.C.A. "S.XI" Commercial Airplane (Belgian): A High-Wing Semicantilever Monoplane

Circular describing the S.A.B.C.A. S.XI commercial airplane, which is a high-wing semicantilever monoplane. Details of the history of its creation, its design, components, engines, fuel tanks, characteristics, performances, drawings, and photographs are provided.
Date: April 1932
Creator: Frachet, André
System: The UNT Digital Library
The Wibault 280 T.10 Commercial Airplane (French): An All-Metal, Cantilever, Low-Wing Monoplane (open access)

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
On the Flow of a Compressible Fluid by the Hodography Method 1: Unification and Extension of Present-Day Results (open access)

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
The Dornier Do K Commercial Airplane (German): A High-Wing Cantilever Monoplane (open access)

The Dornier Do K Commercial Airplane (German): A High-Wing Cantilever Monoplane

Report presenting a description of the Dornier Do K commercial airplane. Details of the construction, design, wing, fuselage, tail, and landing gear are provided.
Date: January 1932
Creator: Heinze, Edwin P. A.
System: The UNT Digital Library
The Dreieck I Tailless Airplane (German): A Low-Wing Cantilever Monoplane (open access)

The Dreieck I Tailless Airplane (German): A Low-Wing Cantilever Monoplane

Circular presenting a description of the Dreieck I tailless airplane, which has been shown to have excellent flying qualities. Information regarding the design and flight characteristics are provided.
Date: March 1932
Creator: Heinze, Edwin P. A.
System: The UNT Digital Library
The C.A.M.S. 54 G.R. Transatlantic Seaplane (French) (open access)

The C.A.M.S. 54 G.R. Transatlantic Seaplane (French)

Tested at the end of March, 1928, the C.A.M.S. 54 G.R. was built for the purpose of crossing the Atlantic from Europe by way of the azores. It has a biplane construction with wings mounted above the hull. It is powered by two new series 500 HP. geared Hispano Suiza V type engines.
Date: September 1928
Creator: Ide, John Jay
System: The UNT Digital Library
On the Flow of a Compressible Fluid by the Hodography Method 2: Fundamental Set of Particular Flow Solutions of the Chaplygin Differential Equation (open access)

On the Flow of a Compressible Fluid by the Hodography Method 2: Fundamental Set of Particular Flow Solutions of the Chaplygin Differential Equation

Report presenting the utilization of the differential equation of Chaplygin's jet problem to give a systematic development of particular solutions of the hodograph flow equations, which extends the treatment of Chaplygin into the supersonic range and completes the set of particular solutions. The solutions serve to place on a reasonable basis the use of velocity correction formulas for the comparison of incompressible and compressible flows.
Date: November 1944
Creator: Kaplan, Carl
System: The UNT Digital Library
The Loire 11 Colonial Military Airplane (French): A High-Wing Semicantilever All-Metal Monoplane (open access)

The Loire 11 Colonial Military Airplane (French): A High-Wing Semicantilever All-Metal Monoplane

Circular presenting a description of the Loire 11 military airplane, which is a landplane. Information regarding the materials, wing, fuselage, power plant, flight characteristics, and some photographs are provided.
Date: March 1932
Creator: Loyer, P.
System: The UNT Digital Library
The Bernard 120 Seaplane (French): A 1400 hp Single-Seat Monoplane Racer (open access)

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 Breguet 410 and 411 Military Airplanes (French): Multiplace Sesquiplane Fighters (open access)

The Breguet 410 and 411 Military Airplanes (French): Multiplace Sesquiplane Fighters

Circular presenting a description of the Breguet 410 and 411 military airplanes, which are both multiplace sesquiplane fighter aircraft. Details of the design, components, flying qualities, drawings, and photographs are provided.
Date: May 1932
Creator: Léglise, Pierre
System: The UNT Digital Library
German Training Airplane, Arado "Ar. S.I." (open access)

German Training Airplane, Arado "Ar. S.I."

Circular presenting a description of the Arado Ar. S.I., which is a wireless biplane that is both physically attractive and highly performing. A description of the components, controls, construction, characteristics, flying qualities, drawings, and photographs are provided.
Date: May 1926
Creator: Manigold, G.
System: The UNT Digital Library
The Propeller and Cooling-Air-Flow Characteristics of a Twin-Engine Airplane Model Equipped With NACA D(Sub S)-Type Cowlings and With Propellers of NACA 16-Series Airfoil Sections (open access)

The Propeller and Cooling-Air-Flow Characteristics of a Twin-Engine Airplane Model Equipped With NACA D(Sub S)-Type Cowlings and With Propellers of NACA 16-Series Airfoil Sections

Report presenting an investigation in the 19-foot pressure tunnel to determine the nacelle drag, the cowling-air flow, and the propeller characteristics of a model of a high-performance military airplane. The model is fitted with NACA D(sub S)-type engine cowlings and with propellers embodying NACA 16-series airfoil sections. Results regarding the propeller characteristics, drag and cowling-air flow with the propeller removed, the effect of propeller on flow through cowling, and the influence of cooling requirements on airplane performance are provided.
Date: September 1944
Creator: McHugh, James G. & Pepper, Edward
System: The UNT Digital Library
A Concise Theoretical Method for Profile-Drag Calculation; Advance Report (open access)

A Concise Theoretical Method for Profile-Drag Calculation; Advance Report

In this report a method is presented for the calculation of the profile drag of airfoil sections. The method requlres only a knowledge of the theoretical velocity distribution and can be applied readily once this dlstribution is ascertained. Comparison of calculated and experimental drag characteristics for several airfoils shows a satisfactory agreement. Sample calculatlons are included.
Date: February 1944
Creator: Nitzberg, Gerald E.
System: The UNT Digital Library
The Hanriot-Biche 110 C1 Airplane (French): An All-Metal Low-Wing Pursuit Monoplane (open access)

The Hanriot-Biche 110 C1 Airplane (French): An All-Metal Low-Wing Pursuit Monoplane

Circular presenting a description of the Hanriot-Biche 110 C1 airplane, which is a French all-metal low-wing pursuit monoplane. Details regarding the wing, girders and tail surfaces, pilot's cockpit, power plant, landing gear, flying qualities, and photographs are provided.
Date: July 1933
Creator: Rabion, René
System: The UNT Digital Library