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1,599 Matching Results
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The Canadian Gypsum Industry
From introduction: The production of gypsum is one of the oldest industries in Canada, and in point of gypsum output Canada ranks third among the countries of the world. Gypsum was discovered in the Maritime Provinces at a very early date, but there is no authentic record..of production until about 1822, when gypsum was mined on a small scale in Ontario. Since.then the production has grown slowly but steadily to more than a million tons. In 1928 the output was 1,205,846 short tons, valued at $3,622,007.
Date:
August 1929
Creator:
Santmyers, R. M.
System:
The UNT Digital Library
The Formation of Ice Upon Airplanes in Flight
This report describes the atmospheric conditions under which ice is formed upon the exposed parts of airplanes in flight. It identifies the formation found under different conditions, and describes some studies of preventative means.
Date:
August 1929
Creator:
Carroll, Thomas & McAvoy, William H.
System:
The UNT Digital Library
The "K 47" of the A.B. Flygindustri: An Armored Pursuit Monoplane
Circular presenting a description of the K 47 airplane, which is a two-seat aircraft created by the A.B. Flygindustri in Sweden. A description of the construction, design, interior, performance, visibility, wings, fuselage, controls, landing gear, engines, weapons, characteristics, drawings, and photographs are provided.
Date:
August 1929
Creator:
Schulz, R.
System:
The UNT Digital Library
Lautal as a Material for Airplane Construction
Lautal is a refinable aluminum alloy which, unlike duralumin, contains no magnesium. According to the statements of the Lauta Works, lautal contains: aluminum, 94%; copper, 4%; silicon, 2%. The use of lautal as a construction material is discussed in relation to specific weight, production methods, and riveting tests.
Date:
August 1929
Creator:
Brenner, Paul
System:
The UNT Digital Library
Metal Construction Development Part 1: General, Strip Metal Construction - Fuselage
Memorandum presenting a general overview of aircraft constructed from metal and fuselages constructed from strip metal.
Date:
August 1929
Creator:
Pollard, H. J.
System:
The UNT Digital Library
Metal Construction Development Part 2: Strip Metal Construction - Wing Spars
Memorandum describing the use of wing spars in metal aircraft. An overview of different types of spurs and testing of the spurs in aircraft are provided.
Date:
August 1929
Creator:
Pollard, H. J.
System:
The UNT Digital Library
Metal Construction Development Part 3: Strip Metal Construction - Wing Ribs
Strip metal construction of wing spars are presented as well as workshop practices.
Date:
August 1929
Creator:
Pollard, H. J.
System:
The UNT Digital Library
The Parnall "Pipit" (British): A Single-Seat Ship's Fighter
The Parnall Pipit is a single-seat ships fighter equipped with a Rolls Royce "F" type engine and armed with two synchronized Vickers guns. It can also be configured to carry bombs under the wings.
Date:
August 1929
Creator:
unknown
System:
The UNT Digital Library
Sphere Drag Tests in the Variable Density Wind Tunnel
The air forces on a twenty-centimeter sphere were measured after it had been rebuilt as an open throat type. The results from tests made at widely different densities and airspeeds and also on a smaller sphere are given. The conclusions are that approximately the same drag coefficient is obtained at a given value of the Reynolds number irrespective of what combination of the variables is used to obtain that value and that the turbulence of the air stream at the test section, as measured by the critical Reynolds number of a sphere, is less for the new tunnel than for the old one.
Date:
August 1929
Creator:
Jacobs, Eastman N.
System:
The UNT Digital Library
Spiral Tendency in Blind Flying
"The flight path followed by an airplane which was being flown by a blindfolded pilot was observed and recorded. When the pilot attempted to make a straight-away flight there was a tendency to deviate from the straight path and to take up a spiral one" (p. 1).
Date:
August 1929
Creator:
Carroll, Thomas & McAvoy, William H.
System:
The UNT Digital Library
The Amiot S.E.C.M. 110 C.1 : A Single-Seat Pursuit Monoplane
Circular presenting a description of the Amiot S.E.C.M. 110 C.1, which is a single-seat pursuit monoplane. Some of the design principles that the aircraft was built from are provided. A description of the design, components, dimensions, flight characteristics, and photographs are provided.
Date:
July 1929
Creator:
unknown
System:
The UNT Digital Library
The Analysis of Aircraft Structures as Space Frameworks: Method Based on the Forces in the Longitudinal Members
The following examples do not take up the discussion of viewpoints to be heeded in determining the design of a framework for given external conditions. Rather they are methods for determining the forces in airplane fuselages and wings, though similar considerations are applied to certain simple cases of a different kind. The object of this treatise is to summarize and amplify these considerations from definite viewpoints.
Date:
July 1929
Creator:
Wagner, Herbert
System:
The UNT Digital Library
Autogenous Welding in Airplane Construction
Autogenous welding is discussed and various methods of testing those welds are presented.
Date:
July 1929
Creator:
Kuchel, Ludwig
System:
The UNT Digital Library
The Bernard 20 C.1 (French): A Single-Seat Pursuit Monoplane
Circular presenting a description of the Bernard 20 C.1, which is made of wood and has four main parts: a one-piece wing with a fuselage in the middle, a rear section with the tail surfaces, an engine mount, and a landing gear.
Date:
July 1929
Creator:
unknown
System:
The UNT Digital Library
Method and Cost of Mining the Thick Freeport Coal in a Second Western Pennsylvania Mine
From introduction: The purpose of this paper is to present a detailed description of the methods employed and the equipment used, with the results obtained in the operation of this mine in the thick Freeport bed on the northern end of the field, near the Alleghegny-Butler county line in western Pennsylvania. It may be classed as a captive mine, as the largest portion of the product is consumed at the by-product plants of the parent company
Date:
July 1929
Creator:
Paul, James Washington & Tomlinson, H.
System:
The UNT Digital Library
Torsional Rigidity of Cantilever Wings With Constant Spar and Rib Sections
"The present paper treats less of the effect of the union (of spars and ribs, namely, the reduction of the bending moment at the fixed ends of the spars) than of its influence on the torsional rigidity of the wing. The calculations are carried out for a two-spar wing of constant cross section, in which the ribs are replaced by a continuous member of constant rigidity" (p. 1).
Date:
July 1929
Creator:
Gabrielli, Giuseppe
System:
The UNT Digital Library
The Use of Wheel Brakes on Airplanes
The results of tests to determine the effect of wheel brakes on the landing run of an airplane under conditions of load and at various wind velocities are presented.
Date:
July 1929
Creator:
Carroll, Thomas & DeFrance, Smith J.
System:
The UNT Digital Library
Wind Tunnel Pressure Distribution Tests on a Series of Biplane Wing Models Part I: Effects of Changes in Stagger and Gap
This report is on the changes in forces on each wing of a biplane cellule when either the stagger or the gap is varied. Since each test was carried up to a 90 degree angle of attack, the results may be used in the study of stalled flight and of spinning as well as in the structural design of biplane wings.
Date:
July 1929
Creator:
Knight, Montgomery & Noyes, Richard W.
System:
The UNT Digital Library
Wings With Nozzle-Shaped Slots
Even before the publication of the results of the Gottingen experiments on the removal of the boundary layer by suction, experiments with nozzle-slotted wings were begun. A report of those experiments will be given here. Taken collectively, the experiments show that, as regards increasing the lift values, the effect of the air flowing from the nozzle-shaped slots is similar to the effect produced in the case of ordinary slotted wings. The high lift values are attained, however, at the smaller angles of attack employed in ordinary flight.
Date:
July 1929
Creator:
Katzmayr, Richard
System:
The UNT Digital Library
Correcting Engine Tests for Humidity
Note presenting tests using a multicylinder engine to determine the effect that atmospheric humidity has on some phases of engine performance. Three test series with different types of fuel were carried out. The results indicate that failure to allow for the effect of differences in atmospheric humidity may introduce errors as great as would be occasioned by failure to allow for changes in barometric pressure.
Date:
June 1929
Creator:
Brooks, Donald B.
System:
The UNT Digital Library
Crank Case Scavenging of Two-Stroke-Cycle Engines
This report presents the results of tests on two-stroke-cycle Diesel engines to determine the efficiency of the crank case scavenging pump. It was determined that efficiencies were between 95 and 100%.
Date:
June 1929
Creator:
List, Hans
System:
The UNT Digital Library
Force Measurements on Airplanes
The most essential phenomena of aircraft should be classified according to their origin and then measured. Information can thus be obtained in a quicker, cheaper, and more reliable way than otherwise would be possible.
Date:
June 1929
Creator:
Seewald, F.
System:
The UNT Digital Library
Investigation of Atomization in Carburetors
This report presents methods by which it is possible to determine, in a simple manner, both pressure atomization and carburetor atomization.
Date:
June 1929
Creator:
Sauter, J.
System:
The UNT Digital Library
Investigation of the Effect of the Fuselage on the Wing of a Low-Wing Monoplane
Memorandum presenting the mutual action of wing and fuselage, which greatly affects the construction of airplanes. A description of systematic wind-tunnel tests that were made to answer that question is provided. Other tests deal with the transition from fuselage to wing root, which, if inadequate on low-wing monoplanes, may become dangerous by causing the air flow to separate at the wing root.
Date:
June 1929
Creator:
Muttray, H.
System:
The UNT Digital Library