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In-Flight Gains Realized by Modifying a Twin Side-Inlet Induction System
Memorandum presenting an investigation of the effects of modifying a twin side-inlet duct system on an interceptor airplane as recorded and analyzed over an altitude range from about 25,000 to 51,000...
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Off-Design Performance of Divergent Ejectors
Report presenting an investigation of the off-design performance of fixed- and variable-geometry divergent ejectors. Results regarding fixed geometry and low secondary flow, fixed geometry and high...
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Effect of pressure level on afterburner-wall temperatures
Report presenting an investigation conducted on a full-scale afterburner and turbojet engine to determine the effect of pressure level on afterburner-wall temperature. For a given ratio of cooling...
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Note on the Katzmayr Effect on Airfoil Drag
The reduction of drag of an airfoil when the air stream is oscillating is called the Katzmayr effect. The purpose here is to offer a simple explanation of the cause of the Katzmayr effect.
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The Lateral Failure of Spars
It was concluded that after the critical span or depth-breadth ratio has been reached, the modulus of rupture varies approximately inversely as the first power of the span and of the depth-breadth...
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"A L C L A D": A New Corrosion Resistant Aluminum Product
Described here is a new corrosion resistant aluminum product which is markedly superior to the present strong alloys. Alclad is a heat-treated aluminum, copper, manganese, magnesium alloy that has the...
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Discharge Characteristics of a High Speed Fuel Injection System
Discussed here are some discharge characteristics of a fuel injection system intended primarily for high speed service. The system consisted of a cam actuated fuel pump, a spring loaded automatic...
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The Resistance to the Steady Motion of Small Spheres in Fluids
"There seems to be little reliable information conveniently available as to the resistance encountered by small spheres moving steadily at moderate speeds in fluids. The present paper, while presenting...
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A warning concerning the take-off with heavy load
"A successful take-off can be made with an airplane so heavily loaded that it cannot climb to a height greater than the span of its wings. The explanation is that the power required to maintain level...
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The Spacing of Orifices for the Measure of Pressure Distributions
"The following report has been prepared for publication by the NACA. Suitable locations of orifices for the measurement of pressure distributions have been discussed. Tables are given for quickly...
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Simplified Propeller Design for Low-Powered Airplanes
"The object of this report is to furnish the designer and builder of small airplanes a simple system for designing the propeller and making the drawing. An empirical design method is used, based on...
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Technical Preparation of the Airplane "Spirit of St. Louis"
Given here is a brief history of the design and construction of the "Spirit of St. Lewis", the airplane that Charles Lindbergh flew solo across the Atlantic. Although the plan was to modify a standard...
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An Altitude Chamber for the Study and Calibration of Aeronautical Instruments
"The design and construction of an altitude chamber, in which both pressure and temperature can be varied independently, was carried out by the NACA at the Langley Memorial Aeronautical Laboratory for...
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Micarta propellers IV : technical methods of design
A description is given of the methods used in design of Micarta propellers. The most direct method for working out the design of a Micarta propeller is to start with the diameter and blade angles of a...
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The Testing of Aviation Engines Under Approximate Altitude Conditions
Note presenting a description of the aviation testing laboratory that has been built at the Bureau of Standards in order to test aviation engines under approximate engine conditions. A description of...
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Micarta Propellers III: General Description of the Design
The design of propellers made of Micarta is discussed. The advantages of the material are noted, especially as compared with wood. The design changes necessitated by the use of Micarta are discussed...
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The Flettner Rotor Ship in the Light of the Kutta-Joukowski Theory and of...
"In this paper the fundamental principles of the Flettner rotor ship (Reference I) are discussed in the light of the Kutta-Joukowski theory and available experimental information on the subject. A...
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Tests of rotating cylinders
Tests were made in the no. 1 (5 ft. atmospheric) wind tunnel at Langley Memorial Aeronautical Laboratory to determine the air forces acting on rotating cylinders with axes perpendicular to the...
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Measuring an Airplane's True Speed in Flight Testing
Note giving an overview of five distinct methods shown for timing an airplane over a given distance and measuring the wind velocity, which provides the true speed of the airplane.
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Determination and Classification of the Aerodynamic Properties of Wing Sections
The following note, prepared for the NACA, contains several remarks on the possible improvement of the experimental determination of the aerodynamic properties of wing sections. It shows how errors of...
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