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  Partner: UNT Libraries Government Documents Department
 Year: 1943
 Month: April
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
Diesel Engines Underground: [Part] 4. Effect on Composition of Exhaust Gas of Variables Influencing Fuel Injection

Diesel Engines Underground: [Part] 4. Effect on Composition of Exhaust Gas of Variables Influencing Fuel Injection

Date: April 1943
Creator: Holtz, John C.; Berger, L. B.; Elliott, M. A. & Schrenk, H. H.
Description: Report issued by the Bureau of Mines over diesel engine operations. As stated in the introduction, "it is the purpose of this report to present such data and to reemphasize the importance of adequate maintenance for diesel engines used underground" (p. 2). This report includes tables, and illustrations.
Contributing Partner: UNT Libraries Government Documents Department
Effect of varying percentages of exhaust gas on engine performance

Effect of varying percentages of exhaust gas on engine performance

Date: April 1, 1943
Creator: Barnett, Henry C
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Effect of wing leading-edge slots on the spin and recovery characteristics of airplanes

Effect of wing leading-edge slots on the spin and recovery characteristics of airplanes

Date: April 1, 1943
Creator: Pitkin, Marvin
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Effects of a typical nacelle on the characteristics of a thick low-drag airfoil critically affected by leading-edge roughness

Effects of a typical nacelle on the characteristics of a thick low-drag airfoil critically affected by leading-edge roughness

Date: April 1, 1943
Creator: Ellis, Macon C , Jr
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Experimental Investigation of a Model of a Two-Stage Turboblower

Experimental Investigation of a Model of a Two-Stage Turboblower

Date: April 1, 1943
Creator: Dovjik, s. & Polikovsky, W.
Description: In the present paper an investigation is made of two stages of a multistage turboblower having a vaneless diffuser behind the impeller and guide vanes at the inlet to the nest stage. The method employed was that of investigating the performance of the successive elements of the blower (the impeller, vaneless diffuser, ets.) whereby the kinematics of the flow through the blower could be followed and the pressure at the different points computed. The character of the flow and the physical significance of the loss coefficients could thereby be determined so as to secure the best agreement of the computed with the actual performance of the blower. Since the tests were carried out for various delivery volumes, the dependence of the coefficients on a number of factors (angle of attack, velocities, etc.) could be obtained. The distribution of the losses that occur during the transformation of dynamic pressure at the impeller exit into static pressure could be found and likewise the range within which the friction coefficient varies in the vaneless diffuser. With the aid of factors having a certain physical significance, the centrifugal blower could be computed on the basis of a more or less schematical consideration of the ...
Contributing Partner: UNT Libraries Government Documents Department
Flight tests of a glider model towed by twin parallel towlines

Flight tests of a glider model towed by twin parallel towlines

Date: April 1, 1943
Creator: Mckinney, Marion O , Jr
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Flying qualities and stalling characteristics of North American XP-51 airplane

Flying qualities and stalling characteristics of North American XP-51 airplane

Date: April 1, 1943
Creator: Garris, Howard W
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Free-flight-tunnel investigation of the effect of the fuselage length and the aspect ratio and size of the vertical tail on lateral stability and control

Free-flight-tunnel investigation of the effect of the fuselage length and the aspect ratio and size of the vertical tail on lateral stability and control

Date: April 1, 1943
Creator: Draper, John W
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Heat Transfer of Airfoils and Plates

Heat Transfer of Airfoils and Plates

Date: April 1, 1943
Creator: Seibert, Otto
Description: The few available test data on the heat dissipation of wholly or partly heated airfoil models are compared with the corresponding data for the flat plate as obtained by an extension of Prandtl's momentum theory, with differentiation between laminar and turbulent boundary layer and transitional region between both, the extent and appearance of which depend upon certain critical factors. The satisfactory agreement obtained justifies far-reaching conclusions in respect to other profile forms and arrangements of heated surface areas. The temperature relationship of the material quantities in its effect on the heat dissipation is discussed as far as is possible at tk.e present state of research, and it is shown that the profile drag of heated wing surfaces can increase or decrease with the temperature increase depending upon the momentarily existent structure of the boundary layer.
Contributing Partner: UNT Libraries Government Documents Department
An investigation of aircraft heaters XI : measured and predicted performance of a slotted-fin exhaust gas and air heat exchanger

An investigation of aircraft heaters XI : measured and predicted performance of a slotted-fin exhaust gas and air heat exchanger

Date: April 1, 1943
Creator: Morrin, E H
Description: None
Contributing Partner: UNT Libraries Government Documents Department
An investigation of the air flow around a Martin PBM-3 flying boat by means of tufts

An investigation of the air flow around a Martin PBM-3 flying boat by means of tufts

Date: April 1, 1943
Creator: Ebert, John W
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Laminar-boundary-layer oscillations and transition on a flat plate

Laminar-boundary-layer oscillations and transition on a flat plate

Date: April 1943
Creator: Skramstad, H. K.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Newsmap. Monday, April 5, 1943 : week of March 26 to April 2, 186th week of the war, 68th week of U.S. participation

Newsmap. Monday, April 5, 1943 : week of March 26 to April 2, 186th week of the war, 68th week of U.S. participation

Date: April 5, 1943
Creator: [United States.] Army Orientation Course
Description: Front: Text describes action on various war fronts: Tunisia, Russia, Southwest Pacific, Air offensive, Aleutians. Large world map is keyed to text and illustrates time zones around the world. Inset map shows Tunisia. Includes photographs: troops receiving daily news summaries, bombers in flight, M-10 tank destroyers, and a German Mark VI. Back: British Aircraft. 19 aircraft are identified by sketch or photograph. Text provides description of each.
Contributing Partner: UNT Libraries Government Documents Department
Newsmap. Monday, April 12, 1943 : week of April 2 to April 9, 187th week of the war, 69th week of U.S. participation

Newsmap. Monday, April 12, 1943 : week of April 2 to April 9, 187th week of the war, 69th week of U.S. participation

Date: April 12, 1943
Creator: [United States.] Army Orientation Course
Description: Front: Text describes action on various war fronts: Russia, Solomons, New Guinea, Aleutians, Bolivia, Tunisia, Air offensive. Large world map is keyed to text and illustrates time zones around the world. Inset maps show Sicily and Tunis. Includes photographs: Malaria control, Super block-buster [8,000 lb. aerial bomb], Change of ownership [captured Mercedes Benz troop-carrier], Bren-gun carriers support British Grenadiers in Kasserine Pass, Italian troops in the African war zone. Back: The Marine Corps. A unified fighting force. Graphic image shows helmeted Marine soldiers with rifles attacking a tropical island with ships and transport boats in background, as well as various photos of parachutes, bombardments, etc.
Contributing Partner: UNT Libraries Government Documents Department
Newsmap. Monday, April 19, 1943 : week of April 9 to April 16, 188th week of the war, 70th week of U.S. participation

Newsmap. Monday, April 19, 1943 : week of April 9 to April 16, 188th week of the war, 70th week of U.S. participation

Date: April 19, 1943
Creator: [United States.] Army Orientation Course
Description: Front: Text describes action on various war fronts: Tunisia -- Southwest Pacific -- Russia -- Mediterranean. Large world map is keyed to text and illustrates time zones around the world. Inset maps show Allied drive in Tunisia -- Japanese controlled areas throughout the Southwest Pacific. Includes photographs: Helping Rommel's run [puppy stationed atop a Vickers machine gun] -- So he can fight (Staff Sergt. Hollers clerks at the San Angelo AAF Bombardier School in Texas) -- Blimp training. Back: Tunisia, map with inset showing location of Tunisia in the Mediterranean area.
Contributing Partner: UNT Libraries Government Documents Department
Newsmap. Monday, April 26, 1943 : week of April 16 to April 23 : 189th week of the war, 71st week of U.S. participation

Newsmap. Monday, April 26, 1943 : week of April 16 to April 23 : 189th week of the war, 71st week of U.S. participation

Date: April 26, 1943
Creator: [United States.] Army Orientation Course
Description: Text describes action on various war fronts: Tunisia, Raid on Japan, Southwest Pacific, Italy, Air offensive, Russia, Aleutians. Large world map is keyed to text. Shows United Nations countries, Axis and Axis occupied areas, countries with Axis relations broken, and neutral countries. Inset maps show Italy, Sardinia, and northern Tunisia; Axis held areas in Tunisia; Nazi held areas around the Sea of Azov. Back: Fox Holes: Dig!..Or Die! Photographs and illustrations describing proper fox hole preparation and use.
Contributing Partner: UNT Libraries Government Documents Department
Observations of compressibility phenomena in flight

Observations of compressibility phenomena in flight

Date: April 1, 1943
Creator: Pearson, H A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Physical data on certain alloys for high temperature applications

Physical data on certain alloys for high temperature applications

Date: April 1943
Creator: Rote, F. B.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Pneumatic ponton bridge M3

Pneumatic ponton bridge M3

Date: April 19, 1943
Creator: United States. War Department.
Description: Discusses the purpose and usage of the pneumatic pontoon bridge M3 by infantry in the field. Covers construction, deployment, and maintenance.
Contributing Partner: UNT Libraries Government Documents Department
Quartermaster operations.

Quartermaster operations.

Date: April 29, 1943
Creator: United States. War Department.
Description: Describes the organization and functions of the U.S. Army Quartermaster Corps.
Contributing Partner: UNT Libraries Government Documents Department
Review of flight tests of NACA C and D cowlings on the XP-42 airplane

Review of flight tests of NACA C and D cowlings on the XP-42 airplane

Date: April 1, 1943
Creator: Johnston, J Ford
Description: None
Contributing Partner: UNT Libraries Government Documents Department
A study of the effects of radii of gyration and altitude on aileron effectiveness at high speed

A study of the effects of radii of gyration and altitude on aileron effectiveness at high speed

Date: April 1, 1943
Creator: Fehlner, Leo F.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Theoretical Determination of Axial Fan Performance

Theoretical Determination of Axial Fan Performance

Date: April 1, 1943
Creator: Struve, E.
Description: The report presents a method for the computation of axial fan characteristics. The method is based on the assumption that the law of constancy of the circulation along the blade holds, approximately, for all fan conditions for which the blade elements operate at normal angles of attack (up to the stalling angles). Pressure head coefficient K(sub a) and power coefficient K(sub u) for the force components in the axial and tangential directions, respectively, and analogous to the lift and drag coefficients C(sub y) and C(sub x) are conveniently introduced.
Contributing Partner: UNT Libraries Government Documents Department
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