You limited your search to:

  Partner: UNT Libraries Government Documents Department
 Serial/Series Title: NACA Technical Memorandums
 Collection: National Advisory Committee for Aeronautics Collection
Pressure measurements during flight

Pressure measurements during flight

Date: November 1, 1922
Creator: Proll, A
Description: The general idea was to record the air pressure on the spot, that is, without intervening tubes, by some simple automatic registering device. This was therefore made in such small dimensions that it could be inserted into the wing between the ribs and stand in direct connection with the pressure openings. The results of different experiments are presented along with the best locations for locating the instruments for recording the pressure.
Contributing Partner: UNT Libraries Government Documents Department
Recent progress in the theory of air flow as applied to aeronautics

Recent progress in the theory of air flow as applied to aeronautics

Date: January 1, 1922
Creator: Prandtl, L
Description: In summing up it may be said that the hydrodynamic theories are best confirmed by experimental results for bodies with small resistance or drag and can accordingly be used in place of experimental tests.
Contributing Partner: UNT Libraries Government Documents Department
Vibrations of aviation engines

Vibrations of aviation engines

Date: January 1, 1922
Creator: Lagarde, Martinot C
Description: Different causes of airplane engine vibration are given as well as devices to measure vibration.
Contributing Partner: UNT Libraries Government Documents Department
Dependence of propeller efficiency on angle of attack of propeller blade

Dependence of propeller efficiency on angle of attack of propeller blade

Date: January 1, 1921
Creator: Borck, Hermann
Description: In order to determine the maximum and the most favorable pitch for a propeller, it was found desirable to investigate the dependence of propeller efficiency on the angle of attack of the propeller blade. The results of a few experiments are given to show that propeller blades conduct themselves just like airplane wings with reference to the dependence of their efficiency on their angle of attack.
Contributing Partner: UNT Libraries Government Documents Department
Systematic wind-tunnel measurements on a laminar wing with nose flap

Systematic wind-tunnel measurements on a laminar wing with nose flap

Date: April 1, 1947
Creator: Krueger, W.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Development of a laminar boundary layer behind a suction point

Development of a laminar boundary layer behind a suction point

Date: March 1, 1952
Creator: Wuest, W.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Some remarks concerning soaring flight

Some remarks concerning soaring flight

Date: October 1, 1921
Creator: Prandtl, L
Description: The publication of the following details is due to the desire of the editor to have the problems of soaring flight treated on the occasion of the Rhone Soaring Flight Contest.
Contributing Partner: UNT Libraries Government Documents Department
On the three-dimensional instability of laminar boundary layers on concave walls, Ph.D. Thesis - Goettingen Univ.

On the three-dimensional instability of laminar boundary layers on concave walls, Ph.D. Thesis - Goettingen Univ.

Date: June 1, 1954
Creator: Goertler, H.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Marking airdromes

Marking airdromes

Date: February 1, 1922
Creator: James, P
Description: Necessity of adopting for all aviation fields, civil or military, a single system of markers for giving the direction for starting and landing (with an automatic indicator of the direction of the wind) and of indicating the good part of the field.
Contributing Partner: UNT Libraries Government Documents Department
The efficiency of a wind tunnel

The efficiency of a wind tunnel

Date: February 1, 1922
Creator: Miller, Wm H
Description: If, by some means, a steady state of motion of a perfect fluid were established in an ideal wind tunnel, there would be no losses, and the motion would persist indefinitely. In the actual tunnel, the function of the motor-fan group is overcome by the total loss of head in the tube due to friction and eddies.
Contributing Partner: UNT Libraries Government Documents Department
Flight experiences and tests on two airplanes with suction slots

Flight experiences and tests on two airplanes with suction slots

Date: January 1, 1950
Creator: Stueper, BY
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Theoretical investigation of drag reduction in maintaining the laminar boundary layer by suction

Theoretical investigation of drag reduction in maintaining the laminar boundary layer by suction

Date: June 1, 1947
Creator: Ulrich, A.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Sixth meeting of the members of the German Scientific Association for Aeronautics

Sixth meeting of the members of the German Scientific Association for Aeronautics

Date: April 1, 1921
Creator: unknown
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Resume of the theory of naval and aerial propulsive propellers and of airplanes in the rectilinear flight

Resume of the theory of naval and aerial propulsive propellers and of airplanes in the rectilinear flight

Date: April 1, 1921
Creator: Rateau, A
Description: Though dissimilar, these two subjects have been united because they have some points in common. The computation of the movement of an airplane can only be correctly established if we are in a position to know exactly the thrust and resisting torque of the propeller for the various values of slip, which may vary greatly according to circumstance. The first part of the work concerns propellers and introduces as a fundamental variable, the true slip (delta) with respect to the effective pitch, which is the advance per revolution of the propeller corresponding to no thrust. The second part deals with characteristic curves of an airplane.
Contributing Partner: UNT Libraries Government Documents Department
The small diesel engine as an automotive engine

The small diesel engine as an automotive engine

Date: September 1, 1921
Creator: Frey, Ernst
Description: Essential principles for building small diesel engines and also structural details so far as feasibility are presented.
Contributing Partner: UNT Libraries Government Documents Department
Large German airship stations

Large German airship stations

Date: August 1, 1921
Creator: Sabatier, J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Tests of artificial flight at high altitudes

Tests of artificial flight at high altitudes

Date: November 1, 1920
Creator: Gradenwitz, Arthur
Description: If we wish to form an accurate idea of the extraordinary progress achieved in aeronautics, a comparison must be made of the latest altitude records and the figures regarded as highest attainable limit some ten years ago. It is desirable, for two reasons, that we should be able to define the limit of the altitudes that can be reached without artificial aid. First, to know to what extent the human body can endure the inhalation of rarified air. Second, the mental capacity of the aviator must be tested at high altitudes and the limit known below which he is able to make reliable observations without being artificially supplied with oxygen. A pneumatic chamber was used for the most accurate observations.
Contributing Partner: UNT Libraries Government Documents Department
Shape and strength of seaplane under-structures with special regard to seaworthiness

Shape and strength of seaplane under-structures with special regard to seaworthiness

Date: August 1, 1921
Creator: Lewe, Victor
Description: This report presents experiments and calculations for the purpose of determining the landing gear requirements upon the water. Moving pictures are given which furnish data and also may give both the magnitude and direction of the forces acting. Different classes of seaplanes are examined and proposals for calculation instructions are given.
Contributing Partner: UNT Libraries Government Documents Department
High efficiency of seaplanes

High efficiency of seaplanes

Date: August 1, 1921
Creator: Pegna, G
Description: A table is presented which includes data for calculating the index of efficiency. The author uses this data to conclude that seaplanes cannot be considered inferior to terrestrial airplanes.
Contributing Partner: UNT Libraries Government Documents Department
Preliminary calculation of cylinder dimensions for aircraft engines

Preliminary calculation of cylinder dimensions for aircraft engines

Date: September 1, 1921
Creator: Schwager, Otto
Description: It is extremely important in building aircraft engines to determine the requisite cylinder dimensions as accurately as possible, in order that the weight required for a given power shall not be excessive. This report presents a calculation method that depends on the air requirement of the fuel.
Contributing Partner: UNT Libraries Government Documents Department
Glossary of terms used in flying boat hull construction

Glossary of terms used in flying boat hull construction

Date: September 1, 1921
Creator: Nicolson, David
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Investigation of an Afterburning Ramjet Using Gaseous Hydrogen as Fuel at Mach Number of 3.0

Investigation of an Afterburning Ramjet Using Gaseous Hydrogen as Fuel at Mach Number of 3.0

Date: June 17, 1957
Creator: Wasserbauer, J. F.
Description: Afterburning ramjet using hydrogen at mach 3.0.
Contributing Partner: UNT Libraries Government Documents Department
Aerial navigation : on the problem of guiding aircraft in a fog or by night when there is no visibility

Aerial navigation : on the problem of guiding aircraft in a fog or by night when there is no visibility

Date: January 1, 1922
Creator: Loth, William
Description: The use of magnetic fields and wire to navigate aircraft in conditions of poor visibility is presented. This field may be considered to be derived from a double lemniscate, considered in the particular case where the origin is a double point formed from the magnetic field of the slack wire, from the field produced by the return currents and from the field due to the currents induced in the conducting mass. These fields are dephased in two ways, one in the direction of the wire, the other in a direction perpendicular to it.
Contributing Partner: UNT Libraries Government Documents Department
Aerial transportation

Aerial transportation

Date: February 1, 1922
Creator: PIERROT
Description: The origin of air traffic dates from the war. The important development of aeronautic industries and the progress made in recent years, under the impelling force of circumstances, rendered it possible, after the close of hostilities, to consider the practical utilization of this new means of economic expansion.
Contributing Partner: UNT Libraries Government Documents Department