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Flying Qualities and Stalling Characteristics of North American XP-51 Airplane

Description: Report presenting a flight investigation of the flying qualities and stalling characteristics of a North American XP-51 airplane. The short-period longitudinal oscillation disappeared within one cycle in all conditions tested. Requirements for satisfactory stalling characteristics were met in all respects except for stall warning.
Date: April 1943
Creator: White, Maurice D.; Hoover, Herbert H. & Garris, Howard W.
Item Type: Refine your search to only Report
open access

Effect of Wing Leading-Edge Slots on the Spin and Recovery Characteristics of Airplanes

Description: Report presenting an investigation in the NACA 15-foot free-spinning tunnel to determine the effect of wing leading-edge slots on spin and recovery characteristics. The results indicate that recovery will generally be slower with the slots open than with them closed and the spin will be flatter and at a lower rate of descent.
Date: April 1943
Creator: Neihouse, Anshal I. & Pitkin, Marvin
Item Type: Refine your search to only Report
open access

Wind-Tunnel Investigation of Devices for Improving the Diving Characteristics of Airplanes

Description: Report discussing testing on a model of a pursuit type airplane to determine the effect of several devices that may be applied to improve the high-speed pitching-moment characteristics. Auxiliary flaps, a controllable stabilizer, and a change in wing contour were all found to help increase the amount of control when recovering from high-speed dives.
Date: April 1943
Creator: Erickson, Albert L.
Item Type: Refine your search to only Report
open access

Physical Data on Certain Alloys for High Temperature Applications

Description: Report presenting data constituting a summary of the physical properties of 120 samples of metal alloys, representing 86 different compositions which have been investigated for their suitability as turbosupercharger wheel materials. Some of the reported data include the chemical composition, fabrication procedure, tensile-test and hardness values at room temperature, and tensile and rupture-test characteristics at 1200 degrees Fahrenheit.
Date: April 1943
Creator: White, A. E.; Freeman, J. W. & Rote, F. B.
Item Type: Refine your search to only Report
open access

Flight Tests of a Glider Model Towed by Twin Parallel Towlines

Description: "The stability characteristics of a glider towed by twin parallel towlines have been studied in the NACA free-flight tunnel. A preliminary theoretical analysis of the stability of a glider restrained from yawing was followed by an experimental investigation of the stability of a model towed from fixed tunnel points in such a way as to simulate tow in level flight. The results of the tests confirm the theoretical analysis and indicate that a pilotless, stable, towed-glider system is possible whe… more
Date: April 1943
Creator: Pitkin, Marvin & McKinney, Marion O., Jr.
Item Type: Refine your search to only Report
open access

Theoretical Determination of Axial Fan Performance

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 co… more
Date: April 1943
Creator: Struve, E.
Item Type: Refine your search to only Report
open access

Experimental Investigation of a Model of a Two-Stage Turboblower

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 signif… more
Date: April 1943
Creator: Dovjik, S. & Polikovsky, W.
Item Type: Refine your search to only Report
open access

Heat Transfer of Airfoils and Plates

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 … more
Date: April 1943
Creator: Seibert, Otto
Item Type: Refine your search to only Report

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

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 hol… more
Date: April 26, 1943
Creator: [United States.] Army Orientation Course.
Item Type: Refine your search to only Poster

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

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. … more
Date: April 19, 1943
Creator: [United States.] Army Orientation Course.
Item Type: Refine your search to only Poster

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

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 … more
Date: April 12, 1943
Creator: [United States.] Army Orientation Course.
Item Type: Refine your search to only Poster

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

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.
Date: April 5, 1943
Creator: [United States.] Army Orientation Course.
Item Type: Refine your search to only Poster
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