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Some Recent Contributions to the Study of Transition and Turbulent Boundary Layers
No Description Available.
Considerations of the Total Drag of Supersonic Airfoil Sections
The results of calculations of the viscous and pressure drags of some two-dimensional supersonic airfoils at zero lift are presented. The results indicate that inclusion of viscous drag alters many previous results regarding the desirability of certain airfoil shapes for securing low drags at supersonic speeds. At certain Reynolds and Mach numbers, for instance, a circular-arc airfoil may theoretically have less drag than the previously advocated symmetrical wedge-shape profile; although under different conditions, the circular-arc airfoil may have a higher drag.
Performance of B. M. W. 185-Horsepower Airplane Engine
No Description Available.
Tables and Charts of Flow Parameters Across Oblique Shocks
Shock-wave equations have been evaluated for a range of Mach number in front of the shock from 1.05 to 4.0. Mach number behind the shock, pressure ratio, derivation of flow, and angle of shock are presented on charts. Values are also included for density ratio and change in entropy.
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.
Summary of 65-Series Compressor-Blade Low-Speed Cascade Data by Use of the Carpet-Plotting Technique
Carpet plots included permit the selection of the blade camber and the design angle of attack required to fulfill a design vector diagram. Other carpet plots provide means for the prediction of off-design turning angles.
Tables for the Computation of Wave Drag of Arrow Wings of Arbitrary Airfoil Section
Tables and computing instructions for the rapid evaluation of the wave drag of delta wings and of arrow wings having a ration of the tangent of the trailing-edge sweep angle to the tangent of the leading-edge sweep angle in the range from -1.0 to 0.8. The tables cover a range of both subsonic and supersonic leading edges.
Two-Dimensional Irrotational Transonic Flows of a Compressible Fluid
The methods of NACA TN No. 995 have been slightly modified and extended in include flows with circulation by considering the alteration of the singularities of the incompressible solution due to the presence of the hypergeometric functions in the analytic continuation of the solution. It was found that for finite Mach numbers the only case in which the nature of the singularity can remain unchanged is for a ratio of specific heats equal to -1. From a study of two particular flows it seems that the effect of geometry cannot be neglected, and the conventional "pressure-correction" formulas are not valid, even in the subsonic region if the body is thick, especially if there is a supersonic region in the flow.
Charts for the Computation of Equilibrium Composition of Chemical Reactions in the Carbon-Hydrogen-Nitrogen System at Temperatures from 2000 to 5000 Degrees K
Charts are provided for the estimation and progressive adjustment of two independent variables on which the calculations are based. Additional charts are provided for the graphical calculation of the composition.
Aerodynamic Investigation of a Cup Anemometer
Results of an investigation wherein the change of the normal force coefficient with Reynolds Number was obtained statically for a 15.5-centimeter hemispherical cup.
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.
Bending Tests of Metal Monocoque Fuselage Construction
Study of the bending stress in smooth skin, aluminum alloy, true monocoque fuselage sections of varying ratio of diameter to thickness.
A Comparison of Theory and Experiment for High-Speed Free-Molecule Flow
Comparison of free-molecule-flow theory with the results of wind-tunnel tests performed to determine the drag and temperature-rise characteristics of a transverse circular cylinder.
Morane-Saulnier 180 light airplane (French) : a single-seat training monoplane
Equipped with a 40 HP Salmson engine, it is a single seat parasol type construction.
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.
Liore-Olivier airplane : type 12 night-bomber or type 20 commercial
No Description Available.
The Francois Villiers marine pursuit airplane
A traditional biplane design allows this craft to function with the speed and maneuverability necessary to perform as a pursuit aircraft while also being able to land on water. It featured retractable landing gear for water landings. It was powered with a 450 HP. Lorraine-Dietrich engine.
The Westland IV commercial monoplane (British)three "Cirrus III" engine
No Description Available.
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.
Bleriot-Spad 91 Airplane (French) : pursuit single-seater, type "Jockey"
This aircraft has announced a speed of 270 km per hour at 4000 m. It is of all metal construction.
Lockheed "Vega" airplane : a commercial cabin monoplane
The Vega is a high wing monoplane suitable for commercial purposes. It can seat 6 passengers or 100 cubic feet of cargo.
The Westland "Widgeon III" "Cirrus II: or "Genet II" engine
The Widgeon III is a parasol type monoplane. One of it's strongest features was the high degree of visibility available to the pilot.
The Mureaux "Brunet 3C2" pursuit airplane
Designed by Engineer Brunet, the 3C2 is an all metal monoplane with two engines and provision for six machine guns and 12 10 Kg. bombs.
The Armstrong Whitworth "Starling" (British) : (single seat fighter)
No Description Available.
The Supermarine "Southampton" seaplane : observation or bomber
Purchased for the British Air Ministry, the Southampton seaplane uses 2 Napier Lion engines and has a boat hull with outriggers mounted on the wings. It was designed as a military aircraft and can be easily converted to a bomber.
The Vickers "Vendace", a land or sea training biplane
No Description Available.
Fiat C.R. 20 pursuit airplane
The Fiat C.R. 20 has an all metal frame covered with fireproof fabric, except for the area near the engines, which is covered in duraluminum. It is armed with 4 machine guns and is capable of 280 KPH.
The Mureaux 111 R.2 military airplane (French) : a long-distance all-metal observation monoplane
No Description Available.
Vojenska-Smolik S.16 airplane : all-metal long-distance observation bi-plane
No Description Available.
The Fairchild "all-purpose" cabin monoplane
The Fairchild "all-purpose" is a 4 seater with a large luggage compartment, good visibility, and can be configured for surveying work. It is rated at 200 HP. at 1800 R.P.M., but can deliver over 220 HP.
Preliminary report on the problem of the atmosphere in relation to aeronautics
A report to the Weather Bureau, Washington DC, from the chairman of the Subcommittee on the Atmosphere in Relation to Aeronautics describing the activities accomplished and the proposal of work to be undertaken by the subcommittee.
The Fokker "Trimotor F VII" commercial transport monoplane
Directly developed from the single engined type F VII ten passenger monoplanes, The Fokker Trimotor closely follows the commercial aircraft that preceded it. It has three Wright Whirlwind air-cooled engines, rated at 200 HP each.
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.
Wibault two-seat monoplane 8C2 : an all-metal pursuit and observation airplane
Michel Wibault's two seat monoplane 8C2, is similar to the Parasol pursuit monoplane which preceded it. It has no perishable parts in its structure and needs no special storage or coverings. The sample aeroplane uses a 500 HP Hispano-Suiza engine but can accept a 400-600HP engine from a variety of manufacturers with little difficulty. It uses a two blade tractor propeller.
The Boulton and Paul "Bugle" airplane : day bomber
The Bugle is a twin engine tractor biplane. It features two Jupiter engines and oleo-pneumatic landing gear. Its maximum speed is 120 MPH.
The Fokker "Universal" commercial airplane
Equipped with a Wright Whirlwind 200-230 H.P. Engine, the Universal can be configured with floats or wheels and seats 4-6 passengers.
Bleriot combat monoplane 127 (French)
The 127 is a cantilever monoplane without external bracing. It is designed to accompany and protect bombardment and observation aircraft.
The Handley Page "Hamlet"
The Hamlet is a three engine high wing monoplane of comparatively small size, fitted with three Bristol Lucifer series IV, engines of 130 HP. each, designed to carry a pilot and four passengers.
Caproni airplane Ca 73 (commercial) and Ca 73 ter (military)
The Caproni 73 is a biplane with medium thick wings, a rigid central section, and with each lateral extension forming a single cell and is powered by two 500 Isotta Fraschini "Asso" Engines.
The De Havilland "Moth"
Officially designated D.H. 60, De Havilland's Moth is a small, simply made, 770 lb. aircraft. It has had it's fittings reduced in number to assist in this, seats 2 (including pilot) and uses a Cirrus 60 HP. engine.
The Boeing mail airplane
The Boeing Mail Airplane is a biplane with cloth covered wings of wood and wire construction, a top speed of 130 MPH, and a fuel capacity of 100 gallons in two tanks.
The Short S.7 "Mussel" : a training seaplane with 65 HP. "Cirrus" engine
No Description Available.
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.
Nieuport-Delage Pursuit Airplane 48 C. 1. : "jockey" type
This is a light single-seat pursuit airplane with a tractor propeller actuated by a 12 cylinder V-type Hispano-Suiza engine giving 400 HP at 2000 R.P.M. This is a single winged aircraft capable of 273 km/h.
The Pitcairn "Mailwing" PA-5 : a single-seat commercial biplane
The Mailwing is a single seat biplane designed primarily for mail and express delivery. It has a cargo capacity of 500 to 600 lbs.
The Pander light biplane : a school two-seater with 45 HP Anzani engine
No Description Available.
The Vickers "Vellore" (British) : a freight carrier which carries a load greater than its own weight?
The Vellore is a single engine biplane of all metal construction. It has a wing span of 76 feet and a loaded weight of 9,500 lbs.
The Armstrong-Whitworth "Argosy" : the latest three-engined commercial airplane
Describes the utility of multi-engine aircraft with special regard to the Argosy, which will seat up to 20 passengers and who's engines turn out nearly 1200 HP. The Argosy had a top speed of 110 MPH, and a range of 400 miles.
Travel Air commercial airplane -- Type 5000
The 5000 is a semicantilever monoplane, closed cabin type, with pilot about in line with the leading edge of the wing and room for 4 passengers behind him. It is equipped with a Wright Whirlwind engine.
Stability of the parachute and helicopter
This report deals with an extension of the theory of stability in oscillation to the case of aircraft following a vertical trajectory, and particularly to the oscillations of parachutes.