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Free-flight-tunnel tests of a target-seeking glide-bomb model with flicker lateral control

Description: Report presenting an investigation of control systems suitable for target-seeking missiles. Testing occurred in the free-flight tunnel of the GB-5 glide bomb equipped with a light-seeker control unit which applied flicker control. Results indicated that good stability could be obtained with the control system, but was somewhat less stable than with a proportional control system.
Date: July 28, 1948
Creator: McKinney, Marion O., Jr. & Drake, Hubert M.
Partner: UNT Libraries Government Documents Department

Techniques for determining thrust in flight for airplanes equipped with afterburners

Description: From Summary: "An experimental technique has been developed which enables a determination of the net propulsive force acting on an afterburner-equipped airplane in flight. The thrust measurement is based on the variation of static and total pressure and stagnation temperature across the fuselage exit as determined by a swinging pitot-static pressure and temperature probe. The details are also presented for an air-cooled fixed-pressure probe for the determination of basic engine thrust."
Date: January 19, 1953
Creator: Rolls, L. Stewart; Havill, C. Dewey & Holden, George R.
Partner: UNT Libraries Government Documents Department

Effects of the spanwise, chordwise and vertical location of an external store on the aerodynamic characteristics of a 60 degree delta wing at Mach numbers of 1.41, 1.62, and 1.96

Description: Report presenting an investigation in the supersonic blowdown tunnel to determine the effects of external store location on the lift, drag, and pitching-moment characteristics of a 60 degree delta wing at Mach numbers of 1.41, 1.62, and 1.96. Brief comparative tests were also made to determine the effect of changing the sweep of the strut attaching the store to the wing and of changing the chordwise location of the swept strut.
Date: October 27, 1952
Creator: Jacobsen, Carl R.
Partner: UNT Libraries Government Documents Department

Effects on control effectiveness of systematically varying the size and location of trailing-edge flaps on a 45 degrees sweptback wing at a Mach number of 1.9

Description: Report presenting the effect of control effectiveness of systematically varying the size and location of trailing-edge flaps on a 45 degree sweptback wing at a Mach number of 1.9. The wing model had an aspect ratio of 2.5, a taper ratio of 0.625, and 6-percent-thick hexagonal airfoil sections. Results regarding the rolling-moment and yawing-moment coefficients, lift, rolling-moment, and pitching-moment effectiveness parameters, and flap characteristics are provided.
Date: December 4, 1951
Creator: Jacobsen, Carl R.
Partner: UNT Libraries Government Documents Department

Control characteristics of trailing-edge spoilers on untapered blunt trailing-edge wings of aspect ratio 2.7 with 0 degree and 45 degrees sweepback at Mach numbers of 1.41 and 1.96

Description: Report presenting an investigation in the supersonic blowdown tunnel to determine the control characteristics of full-span trailing-edge spoilers on two related full-blunt wings with the same aspect ratio but differing angles of sweepback. A similar unswept wing that was larger and had a partially blunt trailing edge was also tested with a full-span trailing-edge spoiler. Results regarding the lift, rolling-moment, and pitching-moment coefficients for unswept wings, the 45-degree sweptback wing, and a comparison of spoiler data with flap data are provided.
Date: December 3, 1952
Creator: Jacobsen, Carl R.
Partner: UNT Libraries Government Documents Department

Theoretical analysis of one-stage windmills for reducing flow distortion

Description: Report presenting an analysis of two windmills for reducing flow distortion. Results regarding the windmill design, flow conditions, velocity distortions, total-pressure distortions, total-temperature distortions, and design value of the ratio of axial velocity to blade tip speed are provided.
Date: June 12, 1957
Creator: English, Robert E. & Yohner, Peggy L.
Partner: UNT Libraries Government Documents Department

Effects of systematically varying the spanwise and vertical location of an external store on the aerodynamic characteristics of an unswept tapered wing of aspect ratio 4 at Mach numbers of 1.41, 1.62, and 1.96

Description: Report presenting an investigation in the supersonic blowdown tunnel to determine the effects of an external store on the lift, drag, and pitching-moment characteristics of an unswept wing of aspect ratio 4 at Mach numbers of 1.41, 1.62, and 1.96.
Date: August 20, 1952
Creator: Jacobsen, Carl R.
Partner: UNT Libraries Government Documents Department

Engineering method of ram-jet thrust determination based on experimentally obtained combustor parameters

Description: From Summary: "A parameter is introduced which simplifies the accounting for pressure losses in ram-jet combustors. This parameter, called the combustor-force coefficient, relates the jet force and the total pressure at the combustion-chamber entrance. Experimental data for several different combustors are presented for evaluation and comparison."
Date: August 13, 1953
Creator: Dettwyler, H. Rudolph & Faget, Maxime A.
Partner: UNT Libraries Government Documents Department

Effect of fuel volatility characteristics on ignition-energy requirements in a turbojet combustor

Description: Report presenting an investigation to determine the effect of fuel volatility characteristics on the minimum spark energy required to ignite a single tubular turbojet-engine combustor. Results regarding the ignition at sea-level conditions, ignition at altitude conditions, relation between distillation data and minimum ignition-energy requirements, and application of relation to data from a previous investigation are provided.
Date: January 13, 1953
Creator: Foster, Hampton H. & Straight, David M.
Partner: UNT Libraries Government Documents Department

Full-scale wind-tunnel tests of a 35 degree sweptback-wing airplane with high-velocity blowing over the trailing-edge flaps: longitudinal and lateral stability and control

Description: Report presenting a wind tunnel investigation to determine the effects of a blowing type boundary-layer control flap on the longitudinal control and lateral stability and control of an F-86D airplane. Tests were made using the following lateral control devices: split-flap-type spoilers, differentially deflected flaps, and differential amounts of blowing over the flaps.
Date: October 5, 1956
Creator: Tolhurst, William H., Jr. & Kelly, Mark W.
Partner: UNT Libraries Government Documents Department

Fundamental flame velocity, heat of combustion, and spontaneous ignition temperature of dimethylaminodiborane

Description: The following properties have been determined for a sample of dimethylaminodiborane : (1) maximum fundamental flame velocity for fuel and air at 35 degrees C, 115 +/- 5 centimeters per second ; (2) net (lower) heat of combustion of liquid fuel to gaseous nitrogen, carbon dioxide, and water, and to solid boric oxide, 19,225 +/- 100 Btu per pound ; and (3) spontaneous ignition temperature, 240 degrees +/- 10 degrees F.
Date: December 19, 1956
Creator: Hibbard, Robert R & Dugger, Gordon L
Partner: UNT Libraries Government Documents Department

High Mach number, low-cowl-drag, external-compression inlet with subsonic dump diffuser

Description: Report presenting an investigation of a zero-cowl-drag, all-external-compression inlet with an abrupt area discontinuity or subsonic dump diffuser for high Mach number application. Results regarding the diffuser performance characteristics, effect of spike retraction, a comparison with other inlets, and some theoretical calculations related to the results are provided.
Date: May 12, 1958
Creator: Connors, James F. & Flaherty, Richard J.
Partner: UNT Libraries Government Documents Department

High-speed cascade tests of a blade section designed for typical hub conditions of high-flow transonic rotors

Description: Report discussing high-speed cascade tests made of a blade section designed for conditions typical of the hub section of high-flow transonic rotors. The intent of the testing is to provide information on the effects of local surface Mach numbers on blade performance. The test results, effect of more forward location on peak surface velocities, effect of increase in pressure-rise coefficient, effect of Mach number and pressure rise on turning angle, and a comparison of variation in momentum-loss coefficient with surface pressure-rise coefficient are provided.
Date: September 28, 1955
Creator: Savage, Melvyn; Felix, A. Richard & Emery, James C.
Partner: UNT Libraries Government Documents Department

High-pressure blowing over flap and wing leading edge of a thin large-scale 49 degree swept wing-body-tail configuration in combination with a drooped nose and a nose with a radius increase

Description: From Summary: "A 49 degree swept-wing complete model equipped for high-pressure blowing full span at two chordwise locations at the leading edge of a full-span wing and over a half-span flap has been tested in the Langley full-scale tunnel to determine the effectiveness of blowing at the leading edge as a supplementary leading-edge stall control at high lift coefficients." The effect of blowing on the lift characteristics, pitching-moment characteristics, and drag characteristics of this particular model is described.
Date: May 28, 1957
Creator: Fink, Marvin P. & McLemore, H. Clyde
Partner: UNT Libraries Government Documents Department

An investigation of four wings of square plan form at a Mach number of 6.86 in the Langley 11-inch hypersonic tunnel

Description: Report presenting the results of pressure-distribution and force tests on four wings at Mach number 6.86 and Reynolds number 980,000 in the 11-inch hypersonic tunnel. Characteristics of the wings tested included a 4-inch square plan form, a 5-percent maximum thickness, and diamond, half-diamond, wedge, and half-circular-arc sections. Information about pressure measurements, wing characteristics, and Schlieren photographs is provided.
Date: June 29, 1951
Creator: McLellan, Charles H.; Bertram, Mitchel H. & Moore, John A.
Partner: UNT Libraries Government Documents Department

Investigation of interference lift, drag, and pitching moment of a series of triangular-wing and body combinations at a Mach number of 1.94

Description: Report presenting an investigation at Mach number 1.94 of a series of triangular-wing and body combinations to determine the interference lift, drag, and pitching moment. The models had a series of seven flat-plate triangular wings of varying scale, four with semiapex angles of 30 degrees, and three with semiapex angles of 45 degrees. Results indicated that the interference between the wing and the body gave an increase in lift over the wing and body alone, but at the expense of more drag.
Date: December 21, 1955
Creator: Coletti, Donald E.
Partner: UNT Libraries Government Documents Department

An investigation of jet effects on adjacent surfaces

Description: From Summary: "The steady pressure loads as well as the temperature change on adjacent surfaces due to the presence of a propulsive jet at subsonic speeds is shown to be insignificant. Whereas at supersonic speeds the temperature effect might be expected to remain insignificant, the steady pressure loads were shown to increase greatly on surfaces downstream of the propulsive jet exit."
Date: June 28, 1955
Creator: Bressette, Walter E. & Faget, Maxime A.
Partner: UNT Libraries Government Documents Department