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 Serial/Series Title: NACA Advanced Confidential Reports
 Collection: National Advisory Committee for Aeronautics Collection
Aerodynamic characteristics of a 4-engine monoplane showing comparison of air-cooled and liquid-cooled engine installations

Aerodynamic characteristics of a 4-engine monoplane showing comparison of air-cooled and liquid-cooled engine installations

Date: July 1939
Creator: Wilson, Herbert A , Jr & Silverstein, Abe
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Aerodynamic characteristics of a 4-engine monoplane showing effects of enclosing the engines in the wing and comparisons of tractor- and pusher-propeller arrangements

Aerodynamic characteristics of a 4-engine monoplane showing effects of enclosing the engines in the wing and comparisons of tractor- and pusher-propeller arrangements

Date: April 1938
Creator: Wilson, Herbert A , Jr
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Aerodynamic characteristics of a slot-lip aileron and slotted flap for dive brakes

Aerodynamic characteristics of a slot-lip aileron and slotted flap for dive brakes

Date: April 1941
Creator: Rogallo, F M
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Aerodynamic problems in the design of efficient propellers

Aerodynamic problems in the design of efficient propellers

Date: August 1942
Creator: Feldman, Lewis
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
Boundary-Layer Transition on the N.A.C.A. 0012 and 23012 Airfoils in the 8-Foot High-Speed Wind Tunnel

Boundary-Layer Transition on the N.A.C.A. 0012 and 23012 Airfoils in the 8-Foot High-Speed Wind Tunnel

Date: January 1, 1940
Creator: Becker, John V
Description: None
Contributing Partner: UNT Libraries Government Documents Department
A Brief Study of the Speed Reduction of Overtaking Airplanes by Means of Air Brakes, Special Report

A Brief Study of the Speed Reduction of Overtaking Airplanes by Means of Air Brakes, Special Report

Date: May 1, 1942
Creator: Pearson, H. A. & Amderspm. R. F.
Description: As an aid to airplane designers interested in providing pursuit airplanes with decelerating devices intended to increase the firing time when overtaking another airplane, formulas are given relating the pertinent distances and speeds in horizontal flight to the drag increase required. Charts are given for a representative parasite-drag coefficient from which the drag increase, the time gained, and the closing distance may be found. The charts are made up for three values of the ratio of the final speed of the pursuing airplane to the speed of the pursued airplane and for several values of the ratio of the speed of the pursued airplane to the initial speed of the pursuing airplane. Charts are also given indicating the drag increases obtainable with double split flaps and with conventional propellers. The use of the charts is illustrated by an example in which it is indicated that either double split flaps or, under certain ideal conditions, reversible propellers should provide the speed reductions required.
Contributing Partner: UNT Libraries Government Documents Department
Calibrations of pitot-static tubes at high speeds

Calibrations of pitot-static tubes at high speeds

Date: July 1, 1942
Creator: Hensley, Reece V
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Characteristics of NACA 4400R Series Rectangular and Tapered Airfoils, Including the Effect of Split Flaps

Characteristics of NACA 4400R Series Rectangular and Tapered Airfoils, Including the Effect of Split Flaps

Date: January 1, 1941
Creator: Greenberg, Harry
Description: No abstract available.
Contributing Partner: UNT Libraries Government Documents Department
Compressibility Effects in Aeronautical Engineering

Compressibility Effects in Aeronautical Engineering

Date: August 1, 1941
Creator: Stack, John
Description: Compressible-flow research, while a relatively new field in aeronautics, is very old, dating back almost to the development of the first firearm. Over the last hundred years, researches have been conducted in the ballistics field, but these results have been of practically no use in aeronautical engineering because the phenomena that have been studied have been the more or less steady supersonic condition of flow. Some work that has been done in connection with steam turbines, particularly nozzle studies, has been of value, In general, however, understanding of compressible-flow phenomena has been very incomplete and permitted no real basis for the solution of aeronautical engineering problems in which.the flow is likely to be unsteady because regions of both subsonic and supersonic speeds may occur. In the early phases of the development of the airplane, speeds were so low that the effects of compressibility could be justifiably ignored. During the last war and immediately after, however, propellers exhibited losses in efficiency as the tip speeds approached the speed of sound, and the first experiments of an aeronautical nature were therefore conducted with propellers. Results of these experiments indicated serious losses of efficiency, but aeronautical engineers were not seriously concerned at the ...
Contributing Partner: UNT Libraries Government Documents Department
Consideration of auxiliary jet propulsion for assisting take-off

Consideration of auxiliary jet propulsion for assisting take-off

Date: May 1, 1940
Creator: Turner, L Richard
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Cooling tests of an air-cooled engine cylinder with copper fins on the barrel

Cooling tests of an air-cooled engine cylinder with copper fins on the barrel

Date: June 1, 1944
Creator: Sanders, J C; Wilsted, H D & Mulcahy, B A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The cross-flow plate-type intercooler

The cross-flow plate-type intercooler

Date: April 1, 1942
Creator: Valerino, Michael F
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Cylinder barrel cooling with bonded preformed copper fins

Cylinder barrel cooling with bonded preformed copper fins

Date: May 1, 1941
Creator: Ellerbrock, H H , Jr
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Design charts for cross-flow tubular intercoolers charge-across-tube type

Design charts for cross-flow tubular intercoolers charge-across-tube type

Date: January 1, 1941
Creator: Valerino, Michael F
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Design charts for cross-flow tubular intercoolers charge-through-tube type

Design charts for cross-flow tubular intercoolers charge-through-tube type

Date: July 1, 1941
Creator: Valerino, Michael F
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The design of cooling ducts with special reference to the boundary layer at the inlet

The design of cooling ducts with special reference to the boundary layer at the inlet

Date: December 1, 1940
Creator: Katzoff, S
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Determination of Flight Paths of an SBD-1 Airplane in Simulated Diving Attacks, Special Report

Determination of Flight Paths of an SBD-1 Airplane in Simulated Diving Attacks, Special Report

Date: March 1, 1943
Creator: Johnson, Harold I.
Description: An investigation has been made to determine the motions of and the flight paths describe by a Navy dive-bombing airplane in simulated diving attacks. The data necessary to evaluate these items, with the exception of the atmospheric wind data, were obtained from automatic recording instruments installed entirely within the airplane. The atmospheric wind data were obtained from the ground by the balloon-theodolite method. The results of typical dives at various dive angles are presented in the form of time histories of the motion of the airplane as well as flight paths calculated with respect to still air and with respect to the ground.
Contributing Partner: UNT Libraries Government Documents Department
The development of satisfactory flying qualities on the Douglas dive bomber, model SBD-1 through flight testing successive modifications in control-surface area, hinge-line location, and aerodynamic-balance nose shape

The development of satisfactory flying qualities on the Douglas dive bomber, model SBD-1 through flight testing successive modifications in control-surface area, hinge-line location, and aerodynamic-balance nose shape

Date: May 1942
Creator: Root, L. E.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Development of thermal ice-prevention equipment for the B-24D airplane

Development of thermal ice-prevention equipment for the B-24D airplane

Date: February 1, 1943
Creator: Rodert, Lewis A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Drag analysis of single-engine military airplanes tested in the NACA full-scale wind tunnel

Drag analysis of single-engine military airplanes tested in the NACA full-scale wind tunnel

Date: October 1, 1940
Creator: Silverstein, Abe
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Drag and propulsive characteristics of air-cooled engine-nacelle installations for two-engine airplanes

Drag and propulsive characteristics of air-cooled engine-nacelle installations for two-engine airplanes

Date: December 1, 1940
Creator: Lehr, Robert R
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Drag measurements of a protruding 0.50-caliber machine gun

Drag measurements of a protruding 0.50-caliber machine gun

Date: July 1, 1941
Creator: Luoma, Arvo A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The Effect of Compressibility on the Growth of the Laminar Boundary Layer on Low-Drag Wings and Bodies

The Effect of Compressibility on the Growth of the Laminar Boundary Layer on Low-Drag Wings and Bodies

Date: January 1, 1943
Creator: Allen, H. Julian & Nitzberg, Gerald E.
Description: The development of the laminar boundary layer in a compressible fluid is considered. Formulas are given for determining the boundary-layer thickness and the ratio of the boundary-layer Reynolds number to the body Reynolds number for airfoils and bodies of revolution. It i s shown that the effect of compressibility will profoundly alter the Reynolds number corresponding to the upper limit of the range of the low-drag coefficients . The available data indicate that for low-drag and high critical compressibility speed airfoils and bodies of revolution, this effect is favorable.
Contributing Partner: UNT Libraries Government Documents Department
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