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Compressibilities of gases
Reproduction of thirteen graphs for computing compressibilities of various gases and for computing the volumes delivered from cylinders containing various gases.
Date:
November 21, 1925
Creator:
Pickering, Samuel Fisher
Object Type:
Report
System:
The UNT Digital Library
The A.N.E.C. IV "Missel Thrush" light airplane
A product of the Air Navigation Engineering Co., the Missel Thrush is a light airplane suitable for private ownership. It is a two seat tractor fuselage biplane with single I interplane struts designed by J. Bewsher.
Date:
November 1926
Creator:
United States. National Advisory Committee for Aeronautics.
Object Type:
Report
System:
The UNT Digital Library
Approximate Calculation of the Static Longitudinal Stability of Airplanes
It seems desirable to have some simple method for calculating quickly and with sufficient accuracy: 1) the correct position of the center of gravity; 2) the requisite tail-group dimensions; 3) and the course of the wing and tail-group moments. In out deductions, we will first replace the biplane (disregarding the effect of stagger, decalage and induced drag) by an equivalent monoplane, whose dimensions and position in space can be approximately determined in a simple manner.
Date:
November 1926
Creator:
Bienen, Theodor
Object Type:
Report
System:
The UNT Digital Library
Avia Pursuit Airplane B.H. 21
Built by the 'Czecho-Slovakian' aircraft factory, AVIA, the B.H. 21, has a top speed of 250 MPH, and carries 120 kg of gasoline and 20 kg of oil, giving it a radius of action of 600-650 km. It is equipped with a Hispano-Suiza engine capable of 300 HP. Details of the design, structure, wings, stabilizer, fuselage, controls, fuel tanks, landing gear, tail, characteristics, performances, drawings, and photographs are provided.
Date:
November 1926
Creator:
Serryer, J.
Object Type:
Report
System:
The UNT Digital Library
Central Aerohydrodynamic Institute of Moscow, Russia
The staff and construction of the Institute are described as well as a variety of experiments and researches being conducted there. The six sections of the laboratory are described, including the Section for Theoretical Researches, Section for Aerodynamic Researches, Windmill Section, Section for Engine-Propeller Groups, Section for Material Testing, and Section for Instrument Making. Special attention is given to the various wind tunnels and testing facilities present.
Date:
November 1926
Creator:
Margoulis, W.
Object Type:
Report
System:
The UNT Digital Library
Devices for Prevention of Stalled Flight
Memorandum describing warning or correcting devices based on the registering of two distinct factors, the air speed and the angle of attack. The authors of the report define the conditions for the flight of an airplane and then study the causes of stalled flight in the different cases where it can occur.
Date:
November 1926
Creator:
Mazer, Paul
Object Type:
Report
System:
The UNT Digital Library
The effect of tube length upon the recorded pressures from a pair of static orifices in a wing panel
Report presenting an investigation to determine the effect of tubing length on the indicated pressure values as ascertained in the pressure distribution measurements on the PW-9. The purpose was to determine the percentage of error in the pressure readings which might be caused by various lengths of tubing between the pressure orifices and pressure cell at the manometer. The differences in head caused by variations in the length of tubing are small, the lowest recorded being zero, the highest 2.7 percent.
Date:
November 1926
Creator:
Carroll, T. & Mixon, R. E.
Object Type:
Report
System:
The UNT Digital Library
Experiments With a Sphere From Which the Boundary Layer Is Removed by Suction
The task of removing the boundary layer by suction consists in producing, in place of the ordinary flow with the formation of vortices, another kind of flow in which the vortices are eliminated by drawing small quantities of fluid from certain points on the surface into the interior of the body. The experiments with a sphere, which constitute the subject of this report, were made early in the present year .
Date:
November 1926
Creator:
Schrenk, Oskar
Object Type:
Report
System:
The UNT Digital Library
Future Timber Supply for Coal Mines: What One Company is Doing
Report discussing a case study of a coal company in Western Pennsylvania to show how mining companies might decrease their timber bills.
Date:
November 1926
Creator:
Tracy, L. D.
Object Type:
Report
System:
The UNT Digital Library
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, and designed to carry a pilot and four passengers. Details of the layout, wings, slot and flap gear, fuselage, characteristics, performance, and drawings are provided.
Date:
November 1926
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Influence of the Orifice on Measured Pressures
"The influence of different orifices on the result of measuring the same pressure distributions is the subject of this note. A circular cylinder is exposed to an air stream perpendicular to its axis and its pressure distribution is repeatedly determined. The pressures measured on the downstream half of the cylinder do not change for the orifice sizes used in the tests" (p. 1).
Date:
November 1926
Creator:
Hemke, Paul E.
Object Type:
Report
System:
The UNT Digital Library
The Meaning of Specifications for Gasoline and Kerosene
Report on how to identify good gasoline and kerosene, written for the average citizen, with an explanation of purchaser and supplier relationships.
Date:
November 1926
Creator:
Kraemer, A. J.
Object Type:
Report
System:
The UNT Digital Library
Use of Sulphite Cellulose Extract as a Tanning Material
Report issued by the Bureau of Standards over chemicals used for tanning leather hides. As stated in the introduction: "an investigation was conducted to determine the suitability of sulfite cellulose extracts, derived from the waste liquors discharged from paper pulp mills, for use in tanning hides for the manufacture of leather" (p. 309). This report includes tables, and photographs.
Date:
November 1, 1926
Creator:
Wallace, E. L. & Bowker, Roy Clement
Object Type:
Report
System:
The UNT Digital Library
Air force and moment for N-20 wing with certain cut-outs
From Introduction: "The airplane designer often finds it necessary, in meeting the requirements of visibility, to remove area or to otherwise locally distort the plan or section of an airplane wing. This report, prepared for the Bureau of Aeronautics January 15, 1925, contains the experimental results of tests on six 5 by 30 inch N-20 wing models, cut out or distorted in different ways, which were conducted in the 8 by 8 foot wind tunnel of the Navy Aerodynamical Laboratory in Washington in 1924. The measured and derived results are given without correction for vl/v for wall effect and for standard air density, p=0.00237 slug per cubic foot."
Date:
November 29, 1926
Creator:
Smith, R. H.
Object Type:
Report
System:
The UNT Digital Library
Approximation method for determining the static stability of a monoplane glider
The calculations in this paper afford an approximate solution of the static stability. A derivation of the formulas for moment coefficient of a wing, moment coefficient of elevator, and the total moment of the combined wing and elevator and the moment coefficient with reference to the center of gravity are provided.
Date:
November 1927
Creator:
Lippisch, A.
Object Type:
Report
System:
The UNT Digital Library
The Distribution of Loads Between the Wings of a Biplane Having Decalage
"It is known that in a biplane the load is not distributed equally between the wings. The presence of one wing will affect the lift characteristics of the other wings. A designer must know the total load that each wing carries in order that he may design an adequate structure. The purpose here is to determine the distribution of loads between the wings of a biplane at various angles of decalage, when the gap/chord ratio is one, and there is no stagger" (p. 1).
Date:
November 1927
Creator:
Mock, Richard M.
Object Type:
Report
System:
The UNT Digital Library
Experiments on Airfoils With Aileron and Slot
The present report contains the results of a few experiments on three airfoils to which the rear portions, having chords respectively 1/4, 1/3, and 2/5 of the total chords, are hinged so as to form ailerons, especial attention being given to the shape of the slot between the aileron and the main portion of the aileron.
Date:
November 1927
Creator:
Betz, A.
Object Type:
Report
System:
The UNT Digital Library
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. Various characteristics of the aircraft are described, including the wings, control surfaces, landing gear, and power plant.
Date:
November 1927
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
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. Details regarding the construction, engine, fuel tank, wings, tail, landing gear, propeller, control, characteristics, performance, drawings, and photographs are provided.
Date:
November 1927
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Practical Underground Education of the Coal Miner
Report describing information that should be provided for miners when they are first being trained on-site, as well as an explanation about the education program offered by the Practical Mining School at Dawson, New Mexico.
Date:
November 1927
Creator:
Grove, G. W.
Object Type:
Report
System:
The UNT Digital Library
Regulations and Inspection Prevent Accidents from Falls of Roof
Report on the need for regulations and inspections to counter preventable mine roof collapses and resulting injuries and fatalities.
Date:
November 1927
Creator:
Paul, J. W.
Object Type:
Report
System:
The UNT Digital Library
Safety in Airplane Flight
This report presents methods to reduce the incidence of aviation accidents. Some of the methods discussed include enlistment and training of aviators, improvement of controls and control surfaces, and upgrading of power plants.
Date:
November 1927
Creator:
Brunat, H.
Object Type:
Report
System:
The UNT Digital Library
Structural Details of German Gliders
The structural details such as wings, fuselage, landing gear, and steering organs of German gliders are detailed in this report.
Date:
November 1927
Creator:
Gymnich, Alfried
Object Type:
Report
System:
The UNT Digital Library
Characteristics of Five Propellers in Flight
"This investigation was made for the purpose of determining the characteristics of five full-scale propellers in flight. The equipment consisted of five propellers in conjunction with a VE-7 airplane and a Wright E-2 engine. The propellers were of the same diameter and aspect ratio. Four of them differed uniformly in thickness and pitch and the fifth propeller was identical with one of the other four with exception of a change of the airfoil section" (p. 267).
Date:
November 8, 1927
Creator:
Crowley, J. W., Jr. & Mixson, R. E.
Object Type:
Report
System:
The UNT Digital Library