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 Decade: 1940-1949
 Year: 1943
 Collection: National Advisory Committee for Aeronautics Collection
Adaptor for measuring principal strains with Tuckerman strain gage

Adaptor for measuring principal strains with Tuckerman strain gage

Date: June 1943
Creator: Mcpherson, A E
Description: An adapter is described which uses three Tuckerman optical strain gages to measure the displacement of the three vortices of an equilateral triangle along lines 120 degrees apart. These displacements are substituted in well-known equations in order to compute the magnitude and direction of the principal strains. Tests of the adaptor indicate that principal strains over a gage length of 1.42 inch may be measured with a systematic error not exceeding 4 percent and a mean observational error of the order of + or minus 0.000006. The maximum observed error in strain was of the order of 0.00006. The directions of principal strains for unidirectional stress were measured with the adaptor with an average error of the order of 1 degree.
Contributing Partner: UNT Libraries Government Documents Department
Additional design charts relating to the stalling of tapered wings

Additional design charts relating to the stalling of tapered wings

Date: January 1943
Creator: Harmon, Sidney M
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The advantages of uniform fuel distribution for air-cooled engines from considerations of cooling requirements and fuel economy

The advantages of uniform fuel distribution for air-cooled engines from considerations of cooling requirements and fuel economy

Date: December 1943
Creator: Nielson, Jack
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Aerodynamic and hydrodynamic tests of a family of models of flying-boat hulls derived from a streamline body : NACA model 84 series

Aerodynamic and hydrodynamic tests of a family of models of flying-boat hulls derived from a streamline body : NACA model 84 series

Date: September 1943
Creator: Luoma, Arvo A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Aerodynamic and hydrodynamic tests of a family of models of flying hulls derived from a streamline body -- NACA model 84 series

Aerodynamic and hydrodynamic tests of a family of models of flying hulls derived from a streamline body -- NACA model 84 series

Date: 1943?
Creator: Parkinson, John B; Olson, Roland E; Draley, Eugene C & Luoma, Arvo A
Description: A series of related forms of flying-boat hulls representing various degrees of compromise between aerodynamic and hydrodynamic requirements was tested in Langley Tank No. 1 and in the Langley 8-foot high-speed tunnel. The purpose of the investigation was to provide information regarding the penalties in water performance resulting from further aerodynamic refinement and, as a corollary, to provide information regarding the penalties in range or payload resulting from the retention of certain desirable hydrodynamic characteristics. The information should form a basis for over-all improvements in hull form.
Contributing Partner: UNT Libraries Government Documents Department
Aerodynamic characteristics and flap loads of perforated double split flaps on a rectangular NACA 23012 airfoil

Aerodynamic characteristics and flap loads of perforated double split flaps on a rectangular NACA 23012 airfoil

Date: January 1943
Creator: Turner, Thomas R
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Air-flow surveys in the region of the tail surfaces of a single-engine airplane equipped with dual-rotating propellers

Air-flow surveys in the region of the tail surfaces of a single-engine airplane equipped with dual-rotating propellers

Date: March 1943
Creator: Sweberg, Harold H
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Altitude rating of electrical apparatus

Altitude rating of electrical apparatus

Date: January 1943
Creator: Lebenbaum, Paul, Jr
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The analysis of strains indicated by multiple-strand resistance-type wire strain gages used as rosettes

The analysis of strains indicated by multiple-strand resistance-type wire strain gages used as rosettes

Date: January 1, 1943
Creator: Dow, Norris F
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Analysis of the High-Altitude Cooling of the Ranger SGV-770 D-4 Engine in the Bell XP-77 Airplane

Analysis of the High-Altitude Cooling of the Ranger SGV-770 D-4 Engine in the Bell XP-77 Airplane

Date: October 1943
Creator: Nielsen, Jack N. & Schumacher, Lloyd E.
Description: No abstract available.
Contributing Partner: UNT Libraries Government Documents Department
Analysis of wind-tunnel stability and control tests in terms of flying qualities in full-scale airplanes

Analysis of wind-tunnel stability and control tests in terms of flying qualities in full-scale airplanes

Date: October 1943
Creator: Kayten, Gerald G
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Analysis of wind-tunnel stability and control tests in terms of flying qualities of full-scale airplanes

Analysis of wind-tunnel stability and control tests in terms of flying qualities of full-scale airplanes

Date: April 1, 1943
Creator: Kayten, Gerald G
Description: The analysis of results of wind-tunnel stability and control tests of powered airplane models in terms of the flying qualities of full-scale airplanes is advocated. In order to indicated the topics upon which comments are considered desirable in the report of a wind-tunnel stability and control investigation and to demonstrate the nature of the suggested analysis, the present NACA flying-qualities requirements are discussed in relation to wind-tunnel tests. General procedures for the estimation of flying qualities from wind-tunnel tests are outlined.
Contributing Partner: UNT Libraries Government Documents Department
Antiknock effectiveness of xylidines in small-scale engines

Antiknock effectiveness of xylidines in small-scale engines

Date: August 1943
Creator: Meyer, Carl L
Description: None
Contributing Partner: UNT Libraries Government Documents Department
An approximate method of shear-lag analysis for beams loaded at right angles to the plane of symmetry of the cross section

An approximate method of shear-lag analysis for beams loaded at right angles to the plane of symmetry of the cross section

Date: September 1, 1943
Creator: Brilmyer, Harold J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Bearing strengths of bare and alclad XA75S-T and 24S-T81 aluminum alloy sheet

Bearing strengths of bare and alclad XA75S-T and 24S-T81 aluminum alloy sheet

Date: December 1, 1943
Creator: Moore, R L & Wescoat, C
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Bearing strengths of some wrought-aluminum alloys

Bearing strengths of some wrought-aluminum alloys

Date: August 1, 1943
Creator: Moore, R L & Wescoat, C
Description: Although a number of investigations of the bearing strength of aluminum alloys have been made, the problem remains one of considerable interest to the aircraft industry. For this reason it has seemed advisable to make additional tests of the commonly used aircraft alloys in an effort to establish a better basis for the selection of allowable bearing values. Current design practice does not recognize the effect of edge distance upon bearing strengths, and for this reason edge distance was one of the principal variables considered in this investigation. The increasing emphasis being placed upon permanent set limitations makes it essential that more information on bearing yield phenomena be obtained. The object of this investigation was to determine bearing yield and ultimate strengths of the following aluminum alloy products: 17S-T, 24S-T, Alclad 24S-T, 24S-RT, 52S-0, 52S-1/2H, 52S-H, 53S-T, and 61S-T extrusions. Ratios of these bearing properties to tensile properties were also determined.
Contributing Partner: UNT Libraries Government Documents Department
Bearing tests of magnesium-alloy sheet

Bearing tests of magnesium-alloy sheet

Date: June 1, 1943
Creator: Sharp, W H & Moore, R L
Description: Bearing tests of AM-3S, AM-52S, and AM-C57S magnesium-alloy sheet in various thicknesses and tempers were made. Bearing yield and ultimate strengths were determined and compared for various edge distances and for various ratios of loading-pin diameter to sheet thickness. Tensile strengths were determined and ratios of average bearing yield and ultimate strength to tensile strength are given. The results of the tests indicated that ultimate bearing strengths increased with edge distances up to 1.5 to 2 times the diameter of the loading pin; that ultimate bearing strengths are a function of the ratio of pin diameter to sheet thickness; and that these properties are effected only slightly by increases in edge distance greater than 1.5 diameters.
Contributing Partner: UNT Libraries Government Documents Department
The belt method for measuring pressure distribution

The belt method for measuring pressure distribution

Date: February 1, 1943
Creator: Corson, Blake W , Jr
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Calculated and measured turning performance of a Navy F2A-3 airplane as affected by the use of flaps

Calculated and measured turning performance of a Navy F2A-3 airplane as affected by the use of flaps

Date: September 1, 1943
Creator: Kauffman, William M
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Certain mechanical strength properties of aluminum alloys 25S-T and X76S-T

Certain mechanical strength properties of aluminum alloys 25S-T and X76S-T

Date: October 1, 1943
Creator: Dolan, Thomas J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Characteristics of an NACA 66, S-209 section hydrofoil at several depths

Characteristics of an NACA 66, S-209 section hydrofoil at several depths

Date: May 1, 1943
Creator: Land, Norman S
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Charts for calculation of the critical stress for local instability of columns with I-, Z-, channel and rectangular-tube section

Charts for calculation of the critical stress for local instability of columns with I-, Z-, channel and rectangular-tube section

Date: November 1, 1943
Creator: Heimerl, George J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
A comparative study of the effect of wing flutter shape on the critical flutter speed

A comparative study of the effect of wing flutter shape on the critical flutter speed

Date: November 1, 1943
Creator: Pinkel, I Irving
Description: None
Contributing Partner: UNT Libraries Government Documents Department
A comparison at high speed of the aerodynamic merits of models of medium bombers having thickened wing roots and having wings with nacelles

A comparison at high speed of the aerodynamic merits of models of medium bombers having thickened wing roots and having wings with nacelles

Date: December 1, 1943
Creator: Draley, Eugene C
Description: None
Contributing Partner: UNT Libraries Government Documents Department
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