UNT Libraries Government Documents Department - 8 Matching Results

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Comparison of Intercooler Characteristics

Description: Report presenting a method of comparing the performance, weight, and general dimensional characteristics of intercoolers. The performance and dimensional characteristics covered in the comparisons include cooling effectiveness, pressure drops and weight flows of the charge and cooling air, power losses, volume, frontal area, and width.
Date: November 1942
Creator: Reuter, J. George & Valerino, Michael F.
Item Type: Refine your search to only Report
open access

Flight investigation of an NACA ice-detector suitable for use as a rate-of-icing indicator

Description: Report presenting an ice detector that can serve as a basis for a rate-of-icing indicator. The instrument consists of a wire screen and a pitot tube mounted behind the screen with both enclosed in a cylindrical shell. Observed data and some possibilities for future development are provided.
Date: November 1942
Creator: Gilruth, R. R.; Zalovcik, J. A. & Jones, A. R.
Item Type: Refine your search to only Report
open access

Full-Scale-Tunnel Investigation of a Multiengine Pusher-Propeller Installation

Description: Report presenting an investigation of propellers designed specifically for pusher operation behind fixed contravanes on a large-scale model of a four-engine airplane. In the test, the wing trailing edge was twisted to serve as a contravane and to produce the rotating inflow required for optimum propulsive efficiency. Results indicated that gains in efficiency of about 3.5 percent at a blade angle of 40 degrees can be obtained by the use of contravanes with specifically designed pusher propeller… more
Date: November 1942
Creator: Wilson, Herbert A., Jr.
Item Type: Refine your search to only Report
open access

Full-Scale Tunnel Investigation of the Control and Stability of a Twin-Engine Monoplane With Propellers Operating

Description: Report presenting extensive force tests covering a wide range of propeller thrust coefficients on a typical twin-engine tractor monoplane model with the horizontal tail surface removed and attached. Measurements were made with flaps retracted and deflected at various angles of attack with different stabilizer and elevator settings. Results regarding the effect of propeller operation on wing-fuselage combination and forces and air flow at tail are provided.
Date: November 1942
Creator: Sweberg, Harold H.
Item Type: Refine your search to only Report
open access

Graphical representation of intercooler parameters and performance at altitudes from 25,000 to 60,000 feet

Description: From Summary: "Interdependence of intercooler parameters and performance for a pursuit-type airplane using a 1675-horsepower engine is shown at altitudes of 25,000, 36,000, 47,000, and 60,000 feet by means of perspective drawings. Qualitatively, the drawings have general application. Intercooling between stages of supercharging at high altitudes results in no saving in the power to supercharge and cool the engine air."
Date: November 1942
Creator: Brimley, D. E.
Item Type: Refine your search to only Report
open access

The longitudinal stability of flying boats as determined by tests of models in the NACA tank 1: methods used for the investigation of longitudinal stability characteristics

Description: Report presenting testing of dynamic models that has been helpful in the determination of the longitudinal stability characteristics on the water of a number of specific flying boats. Results regarding the constant-speed tests, accelerated runs, effect of variations in moment of inertia, effect of variations in mass moving vertically, effect of variations of depth of step, and effect of variations of gross load coefficient are provided.
Date: November 1942
Creator: Olson, Roland E. & Land, Norman S.
Item Type: Refine your search to only Report
open access

The Longitudinal Stability of Flying Boats as Determined by Tests of Models in the NACA Tank 2: Effect of Variations in Form of Hull on Longitudinal Stability

Description: Data taken from tests at constant speed to establish trim limits of stability, tests at accelerated speeds to determine stable limits of center of gravity shift, and tests at decelerated speeds to obtain landing characteristics of several model hull forms were used to establish hull design effect on longitudinal stability of porpoising. Results show a reduction of dead rise angle as being the only investigated factor reducing low trim limit. Various methods of reducing afterbody interference in… more
Date: November 1942
Creator: Truscott, Starr & Olson, Roland E.
Item Type: Refine your search to only Report
open access

Some theoretical considerations of longitudinal stability in power-on flight with special reference to wind-tunnel testing

Description: Report presenting a consideration of some problems related to longitudinal stability in power-on flight. The results indicated that the destabilizing effects of power are more pronounced when the horizontal tail is required to carry a down load to maintain flight equilibrium.
Date: November 1942
Creator: Donlan, Charles J.
Item Type: Refine your search to only Report
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