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Increase in the Maximum Lift of an Airplane Wing Due to a Sudden Increase in Its Effective Angle of Attack Resulting From a Gust

Description: Wind-tunnel tests are described, in which the angle of attack of a wing model was suddenly increased (producing the effect of a vertical gust) and the resulting forces were measured. It was found that the maximum lift coefficient increases in proportion to the rate of increase in the angle of attack. This fact is important for the determination of the gust stresses of airplanes with low wing loading. The results of the calculation of the corrective factor are given for a high-performance glider… more
Date: July 1932
Creator: Kramer, Max
Item Type: Refine your search to only Report
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Influence of Several Factors on Ignition Lag in a Compression-Ignition Engine

Description: "This investigation was made to determine the influence of fuel quality, injection advance angle, injection valve-opening pressure, inlet-air pressure, compression ratio, and engine speed on the time lag of auto-ignition of a Diesel fuel oil in a single-cylinder compression-ignition engine as obtained from an analysis of indicator diagrams. Three cam-operated fuel-injection pumps, two pumps cams, and an automatic injection valve with two different nozzles were used. Ignition lag was considered … more
Date: November 1932
Creator: Gerrish, Harold C. & Voss, Fred
Item Type: Refine your search to only Report
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Lift and drag characteristics and gliding performance of an autogiro as determined in flight

Description: From Summary: "This report presents the results of flight test of the Pitcairn "PCA-2" autogiro. Lift and drag coefficients with the propeller stopped have been determined over approximately a 90 degree range of angles of attack. Based on the sum of fixed-wing and swept-disk areas, the maximum lift coefficient is 0.895, the minimum drag coefficient with propeller stopped is 0.015, and the maximum l/d with propeller stopped is 4.8. Lift coefficients were found also with the propeller delivering … more
Date: May 2, 1932
Creator: Wheatley, John B.
Item Type: Refine your search to only Report
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Liquid-Oxygen Explosives

Description: From Introduction: "The purpose of this bulletin is to examine the advantages and disadvantages of L. O. X., both in the light of experimental investigations by the Bureau of Mines and the results in actual blasting, and to discuss the probable future fields of usefulness for this novel type of explosive."
Date: 1932
Creator: Perrott, G. St. J. & Tolch, N. A.
Item Type: Refine your search to only Report
open access

Making Woodlands Profitable in the Southern States

Description: Revised Edition. Report discussing farm forestry in the southern United States, which "concerns the farmer chiefly as a matter of dollars and cents. Farm forestry may be said to be the handling of forest trees and woodlands in such a manner as to increase the income and the permanent value of the farm." -- p. 1. Topics discussed include marketing timber, protecting woodlands, and making empty spaces profitable.
Date: 1932
Creator: Mattoon, Wilbur R. (Wilbur Reed), 1875-1941
Item Type: Refine your search to only Pamphlet
open access

Measurement of the Differential and Total Thrust and Torque of Six Full-Scale Adjustable-Pitch Propellers

Description: "Force measurements giving total thrust and torque, and propeller slip stream surveys giving differential thrust and torque were simultaneously made on each of six full-scale propellers in the 20-foot propeller-research tunnel of the National Advisory Committee for Aeronautics. They were adjustable-pitch metal propellers 9.5 feet in diameter; three had modified Clark Y blade sections and three had modified RAF-6 blade sections. This report gives the differential thrust and torque and the variat… more
Date: April 15, 1932
Creator: Stickle, George W.
Item Type: Refine your search to only Report
open access

Measurements of flow in the boundary layer of a 1/40-scale model of the U. S. Airship "Akron"

Description: This report presents the results of measurements of flow in the boundary layer of a 1/40-scale model of the U. S. Airship "Akron" (ZRS-4) made with the object of determining the boundary-layer thickness, the point of transition from laminar to the turbulent flow, and the velocity distribution in the boundary layer.
Date: April 27, 1932
Creator: Freeman, Hugh B.
Item Type: Refine your search to only Report
open access

The Mechanism of Atomization Accompanying Solid Injection

Description: "A brief historical and descriptive account of solid injection is followed by a detailed review of the available theoretical and experimental data that seem to throw light on the mechanism of this form of atomization. It is concluded that this evidence indicates that (1) the atomization accompanying solid injection occurs at the surface of the liquid after it issues as a solid stream from the orifice; and (2) that such atomization has a mechanism physically identical with the atomization which … more
Date: January 6, 1932
Creator: Castleman, R. A., Jr.
Item Type: Refine your search to only Report
open access

The Messerschmidt M.29 Touring Airplane (German): A Two-Seat Cantilever Monoplane

Description: Circular describing the Messerschmidt M.29 touring airplane, which is a two-seat cantilever monoplane that was specifically developed as a sport and touring airplane. Details of the flight characteristics, wing structure, fuselage, tail surfaces, landing gear, controls, power plant, instruments, miscellaneous details, characteristics, drawings, and photographs are provided.
Date: November 1932
Item Type: Refine your search to only Report
open access

Meteorological Conditions During the Formation of Ice on Aircraft

Description: These are the results of a number of records recently secured from autographic meteorological instruments mounted on airplanes at times when ice formed. Ice is found to collect on an airplane only when the airplane is in some form of visible moisture, such as cloud, fog, mist, rain. etc., and the air temperature is within certain critical limits. Described here are the characteristics of clear ice and rime ice and the specific types of hazards they present to airplanes and lighter than air vehi… more
Date: December 1932
Creator: Samuels, L. T.
Item Type: Refine your search to only Report
open access

Methods for Facilitating the Blind Landing of Airplanes

Description: "Since the introduction of blind flying, the accomplishment of blind landing on prepared fields has become one of the most pressing problems, and many attempts are being made to solve it. The methods employed, in so far as they have been published, are summarized in this report" (p. 1).
Date: October 1932
Creator: Gloeckner, M. Heinrich
Item Type: Refine your search to only Report
open access

Methods of Recording Rapid Wind Changes

Description: "The purpose of our research was to determine the rapid changes of air currents which impose varying stresses on the wings of airplanes. We attempted to express in figures the turbulence of the air, which perhaps plays some role in the behavior of airplanes in flight, as well as in the realization of certain methods of gliding flight. This is the reason which led us to conceive and develop the experimental equipment (hot-wire anemometer) described herein" (p. 1).
Date: November 1932
Creator: Magnan, A.
Item Type: Refine your search to only Report
open access

Methods of Visually Determining the Air Flow Around Airplanes

Description: "This report describes methods used by the National Advisory Committee for Aeronautics to study visually the air flow around airplanes. The use of streamers, oil and exhaust gas streaks, lampblack and kerosene, powdered materials, and kerosene smoke is briefly described. The generation and distribution of smoke from candles and from titanium tetrachloride are described in greater detail because they appear most advantageous for general application. Examples are included showing results of the v… more
Date: July 1932
Creator: Gough, Melvin N. & Johnson, Ernest
Item Type: Refine your search to only Report
open access

Mining Petroleum by Underground Methods: A study of Methods used in France and Germany and Possible Application to Depleted Oil Fields under American Conditions

Description: From Introduction: "That the percentages of extraction of petroleum from the ground may and undoubtedly will be greatly increased in the future by underground mining methods where natural conditions will permit seems logical. The limitations imposed by depth, temperature, and flow of water under high pressure through the sands will be discussed later."
Date: 1932
Creator: Rice, George S.
Item Type: Refine your search to only Report
open access

The Mutual Action of Airplane Body and Power Plant

Description: The present report concerns the development of general propeller performance and r.p.m. curves which, combined with the general curve of the power required for level flight, presents a complete picture of the performance. The curve of power required for level flight in this paper is only an approximation for constant profile drag coefficient, meaning that it is not suitable to unconventional wing sections.
Date: April 1932
Creator: Schrenk, Martin
Item Type: Refine your search to only Report
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