Altitude performance of compressor, combustor, and turbine components of XT38-A-2 turboprop engine (open access)

Altitude performance of compressor, combustor, and turbine components of XT38-A-2 turboprop engine

From Introduction: "The overall performance and operational characteristics are reported in reference 1. The performance of the components (compressor, combustor, turbine) is reported herein."
Date: August 27, 1954
Creator: Schulze, Frederick W. & Prince, William R.
System: The UNT Digital Library
Investigation of the Effect of Balancing Tabs on the Hinge-Moment Characteristics of a Trailing-Edge Flap-Type Control on a Trapezoidal Wing at a Mach Number of 1.61 (open access)

Investigation of the Effect of Balancing Tabs on the Hinge-Moment Characteristics of a Trailing-Edge Flap-Type Control on a Trapezoidal Wing at a Mach Number of 1.61

Report presenting an investigation at Mach number 1.61 to determine the effect of 10-percent control are attached tabs on the hinge-moment characteristics of a trailing-edge flap-type control on a trapezoidal wing with a 23 degree sweptback leading edge, aspect ratio of 3.1, and taper ratio of 0.4. Results regarding hinge-moment coefficients, tab parameters, and control effectiveness are provided.
Date: August 5, 1954
Creator: Lord, Douglas R. & Driver, Cornelius
System: The UNT Digital Library
Investigation of a 10-stage subsonic axial-flow research compressor 4: performance evaluation and flow distributions in the first, fifth, and tenth stages (open access)

Investigation of a 10-stage subsonic axial-flow research compressor 4: performance evaluation and flow distributions in the first, fifth, and tenth stages

Report presenting a determination of the performance and flow distributions in the first, fifth, and tenth stages of a 10-stage axial-flow research compressor at design and part speed in order to study the validity of the compressor design assumptions and to show the effects of part-speed compressor operation on stage performance.
Date: August 6, 1954
Creator: Budinger, Ray E.
System: The UNT Digital Library
Comparison Between Theoretical and Experimental Rates of Roll of Two Models with Flexible Rectangular Wings at Supersonic Speeds (open access)

Comparison Between Theoretical and Experimental Rates of Roll of Two Models with Flexible Rectangular Wings at Supersonic Speeds

"A comparison is presented between the experimentally measured and theoretically calculated (by the method of NACA TN 3067) rates of roll of two rocket-propelled models with flexible rectangular wings. The comparisons show that although there are large aeroelastic losses in rolling rate, the theory predicts the actual rate of roll accurately" (p. 1).
Date: August 5, 1954
Creator: Hedgepeth, John M. & Kell, Robert J.
System: The UNT Digital Library
Performance of a 16-inch ram-jet engine with a can-type combustor at Mach numbers of 1.50 to 2.16 (open access)

Performance of a 16-inch ram-jet engine with a can-type combustor at Mach numbers of 1.50 to 2.16

Report presenting an investigation in the supersonic wind tunnel to evaluate the performance of a 16-inch ramjet engine using a can-type-combustor configuration. Data were obtained over a range of fuel-air ratios, free-stream Mach numbers, and angles of attack. Combustion efficiencies were generally unaffected by free-stream Mach number and varied between 60 and 90 percent with JP-4 fuel.
Date: August 27, 1954
Creator: Hearth, Donald P. & Perchonok, Eugene
System: The UNT Digital Library
Static Longitudinal Stability Characteristics of a Composite-Plan-Form-Wing-Model Including Some Comparisons with a 45 Degree Sweptback Wing at Transonic Speeds (open access)

Static Longitudinal Stability Characteristics of a Composite-Plan-Form-Wing-Model Including Some Comparisons with a 45 Degree Sweptback Wing at Transonic Speeds

Memorandum presenting an investigation made to determine the low-subsonic-speed static longitudinal stability characteristics of a composite-plan-form wing tested as a wing-fuselage combination and as a complete model. Also included is a comparison of the transonic-speed characteristics of the composite-plan-form wing alone and the 45 degree sweptback wing from which the composite wing was derived.
Date: August 18, 1954
Creator: Wolhart, Walter D.
System: The UNT Digital Library
Effects of Canopy, Revised Vertical Tail, and a Yaw-Damper Vane on the Aerodynamic Characteristics of a 1/16-Scale Model of the Douglas D-558-II Research Airplane at a Mach Number of 2.01 (open access)

Effects of Canopy, Revised Vertical Tail, and a Yaw-Damper Vane on the Aerodynamic Characteristics of a 1/16-Scale Model of the Douglas D-558-II Research Airplane at a Mach Number of 2.01

Report discussing the aerodynamic characteristics in pitch and sideslip of a model of a Douglas D-558-II airplane with and without a yaw-damper vane at Mach number 2.01. A revised model was tested using a canopy and modified vertical tail. The revised configuration was found to have higher directional stability, trim lift coefficients, drag, and more positive effective dihedral than the original configuration.
Date: August 30, 1954
Creator: Robinson, Ross B.
System: The UNT Digital Library
Wind-Tunnel Investigation at Low Speed of the Yawing Stability Derivatives of a 1/10-Scale Model of the Douglas A4D-1 Airplane (open access)

Wind-Tunnel Investigation at Low Speed of the Yawing Stability Derivatives of a 1/10-Scale Model of the Douglas A4D-1 Airplane

Report discussing testing of a model of the Douglas A4D-1 to determine its low-speed yawing stability derivatives. The model was tested in clean and landing configurations with horizontal and vertical tails on and off and an investigation into the effect of slats and flaps on the wing-alone derivatives.
Date: August 25, 1954
Creator: Wolhart, Walter D. & Fletcher, H. S.
System: The UNT Digital Library
Cooling Characteristics of a Transpiration-Cooled Afterburner With a Porous Wall of Brazed and Rolled Wire Cloth (open access)

Cooling Characteristics of a Transpiration-Cooled Afterburner With a Porous Wall of Brazed and Rolled Wire Cloth

Memorandum presenting cooling data for a transpiration-cooled afterburner with a porous combustion-chamber wall of brazed and rolled wire cloth for a range of exhaust-gas temperatures, total flow ratio of cooling air to combustion gas, and pressure altitudes. Maximum wall temperatures based on the cooling correlation were determined for a porous wall of uniform permeability at sea-level takeoff and for several flight Mach numbers. Results regarding typical data, cooling correlation, transpiration-cooling performance, comparison of transpiration and forced-convection cooling, and pressure environment of wire cloth are provided.
Date: August 19, 1954
Creator: Koffel, William K.
System: The UNT Digital Library
Analysis of rocket, ramjet, and turbojet engines for supersonic propulsion of long-range missiles. 3:  Ramjet engine performance (open access)

Analysis of rocket, ramjet, and turbojet engines for supersonic propulsion of long-range missiles. 3: Ramjet engine performance

Report presenting ramjet engine performance data over a range of engine design variables to permit selection and evaluation of a ramjet engine configuration for a long-range supersonic missile. Results include engine thrust, drag, fuel consumption, area ratios, and weight, and are suitable for use in design studies of missiles incorporating either internally or externally mounted ramjet engines.
Date: August 5, 1954
Creator: Weber, Richard J. & Luidens, Roger W.
System: The UNT Digital Library
A Method for Prevention of Screaming in Rocket Engines (open access)

A Method for Prevention of Screaming in Rocket Engines

From Summary: "Lateral and longitudinal combustion-pressure oscillations that occurred in screaming combustion of a 1000-pound-thrust rocket engine using white fuming nitric acid and JP-4 fuel as propellants were successfully prevented by means of longitudinal fins in the combustion chamber. Fin position was critical, and complete attenuation was achieved only when the fins were located in a zone approximately 8 to 16 inches from the injector. Fins located in other zones, that is, near the injector or far downstream from the injector, did not stop the oscillations."
Date: August 19, 1954
Creator: Male, Theodore & Kerslake, William R.
System: The UNT Digital Library
Influence of Combustion-chamber Length on Afterburner Performance (open access)

Influence of Combustion-chamber Length on Afterburner Performance

Memorandum presenting an investigation of the influence of combustion-chamber length on afterburner performance under conditions simulating altitude flight. Results regarding afterburner-inlet conditions, operational limits, and structural cooling requirements are provided.
Date: August 27, 1954
Creator: Useller, James W.; Braithwaite, Willis M. & Rudey, Carl J.
System: The UNT Digital Library
Study of the attack of an automatically controlled interceptor on a maneuvering bomber with emphasis on proper coordination of lift-acceleration and roll-angle commands during rolling maneuvers (open access)

Study of the attack of an automatically controlled interceptor on a maneuvering bomber with emphasis on proper coordination of lift-acceleration and roll-angle commands during rolling maneuvers

Report presenting an investigation of the proper means of coordinating the lift-acceleration commands and the roll-attitude commands to the autopilot in order to minimize transient racking errors encountered during bomber evasion. Results regarding the pull-up maneuver, horizontal turning maneuvers, the split S vertical plane maneuver, diving turn maneuver, other considerations involved in rolling maneuvers, and maximum rates of roll, control motion, and tracking-line motion are provided.
Date: August 4, 1954
Creator: Mathews, Charles W.
System: The UNT Digital Library
Aerodynamic characteristics of several tip controls on a 60 degree wing at a Mach number of 1.61 (open access)

Aerodynamic characteristics of several tip controls on a 60 degree wing at a Mach number of 1.61

Report presenting an investigation at a Mach number of 1.61 to determine the control effectiveness characteristics of seven tip controls on a 60 degree delta wing. Pressure distribution measurements were made for a range of angles of attack and control deflections. Results regarding the effect of control deflection, effect of wing angle of attack, effect of hinge-line location, effect of fences, and effect of control size and location are provided.
Date: August 5, 1954
Creator: Lord, Douglas R. & Czarnecki, K. R.
System: The UNT Digital Library
Effects of Additives on Corrosion and Mass Transfer in Sodium Hydroxide - Nickel Systems Under Free-Convection Conditions (open access)

Effects of Additives on Corrosion and Mass Transfer in Sodium Hydroxide - Nickel Systems Under Free-Convection Conditions

Memorandum presenting a study of the effect of additives on the extent of corrosion and mass transfer in sodium hydroxide - "L" nickel systems. The extent of corrosion and mass transfer was determined by a measurement of the weight change of a specimen in the hot zone, and by metallographic examination of the specimen cross section. Results regarding the reproducibility, appearance of specimens, and additives having a detrimental effect, no effect, or a beneficial effect are provided.
Date: August 2, 1954
Creator: Forestieri, Americo F.
System: The UNT Digital Library
Effect of unequal air-flow distribution from twin inlet ducts on performance of an axial-flow turbojet engine (open access)

Effect of unequal air-flow distribution from twin inlet ducts on performance of an axial-flow turbojet engine

Report presenting an investigation in the NACA altitude test chamber to determine the effect of inlet-air-flow distortion on the performance of an axial-flow turbojet engine with simulated twin inlet ducts. Results regarding the pressure and temperature profiles, component performance, overall engine performance, and operational comments are provided.
Date: August 3, 1954
Creator: Walker, Curtis L.; Sivo, Joseph N. & Jansen, Emmert T.
System: The UNT Digital Library
Effect of Wedge-Type Boundary-Layer Diverters on Performance of Half-Conical Side Inlets at Mach Number 2.96 (open access)

Effect of Wedge-Type Boundary-Layer Diverters on Performance of Half-Conical Side Inlets at Mach Number 2.96

Report presenting an investigation at Mach number 2.96 to study the effects of wedge-type boundary-layer removal on the performance of side inlets with half of a double-conical external-compression surface. Some of the parameters investigated were the wedge height, wedge inclined angle, wedge-tip position, and splitter-plate geometry. Two lengths of constant-area diffuser throat section were also considered.
Date: August 2, 1954
Creator: Johnson, Harry W. & Piercy, Thomas G.
System: The UNT Digital Library
Preliminary Wind Tunnel Investigation of Two Types of Jet-Exit Configurations for Control of Aircraft (open access)

Preliminary Wind Tunnel Investigation of Two Types of Jet-Exit Configurations for Control of Aircraft

Report presenting an investigation of two types of jet controls in the 8- by 6-foot supersonic wind tunnel. One used a converging swiveled nozzle and the other was a biconvex circular-arc vane mounted in a shroud and placed downstream of a convergent nozzle. Results regarding the jet vane, swiveled nozzle, and a preliminary evaluation are provided.
Date: August 6, 1954
Creator: Englert, Gerald W. & Leissler, L. Abbott
System: The UNT Digital Library
An Experimental Investigation of Two-Dimensional, Supersonic Cascade-Type Inlets at a Mach Number of 3.11 (open access)

An Experimental Investigation of Two-Dimensional, Supersonic Cascade-Type Inlets at a Mach Number of 3.11

Memorandum presenting an investigation of two-dimensional, supersonic cascade-type inlets at a free-stream Mach number of 3.11. Two cascade-type inlets utilizing different methods of internal-flow compression were designed and tested. Results regarding the cascade inlet and stepped-cascade inlet are provided.
Date: August 25, 1954
Creator: Óffenhartz, Edward
System: The UNT Digital Library
Exploratory Investigation of External Stores in the Aerodynamic Characteristics of a 1/16-Scale Model of the Douglas D-558-II Research Airplane at a Mach Number of 2.01 (open access)

Exploratory Investigation of External Stores in the Aerodynamic Characteristics of a 1/16-Scale Model of the Douglas D-558-II Research Airplane at a Mach Number of 2.01

Report presenting an investigation of stores on the Douglas D-558-II research airplane in the wind tunnel and in flight using various store configurations. The drag measured for all store configurations was high, from two to three times the free-air drag estimated for the store and pylon. Results regarding longitudinal characteristics and lateral characteristics are provided.
Date: August 25, 1954
Creator: Smith, Norman F.
System: The UNT Digital Library
Characteristics of flow about axially symmetric isentropic spikes for nose inlets at Mach number 3.85 (open access)

Characteristics of flow about axially symmetric isentropic spikes for nose inlets at Mach number 3.85

Report presenting an experimental study of the compression fields around axially symmetric isentropic spikes with varying degrees of compressive flow turning made at a Mach number of 3.85 to analyze the basic shock structures and thereby establish further design criteria for supersonic-inlet applications. Results regarding the original isentropic spike and cowl, isentropic survey-spike configurations, and external-compression limitations are provided.
Date: August 19, 1954
Creator: Connors, James F. & Wollett, Richard R.
System: The UNT Digital Library
Pressure Distributions on Plug- and Semaphore-Type Spoiler Ailerons on a 35 Degree Sweptback Wing of Aspect Ratio 4, Taper Ratio 0.6, and NACA 65A006 Airfoil Section at High Subsonic Speeds (open access)

Pressure Distributions on Plug- and Semaphore-Type Spoiler Ailerons on a 35 Degree Sweptback Wing of Aspect Ratio 4, Taper Ratio 0.6, and NACA 65A006 Airfoil Section at High Subsonic Speeds

Report presenting an investigation in the high-speed tunnel to determine the pressure distribution at the 20-, 46-, and 65-percent wing semispan stations on a plug-type spoiler and a segment of a semaphore-type spoiler. The investigation was carried out at a range of Mach numbers and angles of attack. The pressure distributions and integrated section force and moment data are presented without discussion.
Date: August 30, 1954
Creator: Hammond, Alexander D. & Hayes, William C., Jr.
System: The UNT Digital Library
Wind-Tunnel Investigation at a Mach Number of 2.01 of the Aerodynamic Characteristics in Combined Pitch and Sideslip of Some Canard-Type Missiles Having Cruciform Wings and Canard Surfaces With 70 Degree Delta Plan Forms (open access)

Wind-Tunnel Investigation at a Mach Number of 2.01 of the Aerodynamic Characteristics in Combined Pitch and Sideslip of Some Canard-Type Missiles Having Cruciform Wings and Canard Surfaces With 70 Degree Delta Plan Forms

Memorandum presenting an investigation in the supersonic pressure tunnel to determine the static longitudinal stability and control characteristics of several missiles at a Mach number of 2.01. The present paper consists largely of a data presentation of the results obtained at combined angles of pitch and sideslip. Appendices are included in which the body, wind, and stability-axes systems are described and the transfer equations necessary to convert the basic data to other forms are shown.
Date: August 23, 1954
Creator: Spearman, M. Leroy & Driver, Cornelius
System: The UNT Digital Library
Preliminary Investigation of Stress-Rupture and Tensile Strength of Thermenol, an Iron-Aluminum Alloy (open access)

Preliminary Investigation of Stress-Rupture and Tensile Strength of Thermenol, an Iron-Aluminum Alloy

Memorandum presenting an investigation conducted to determine the stress-rupture life at 1100 and 1200 degrees Fahrenheit, the room temperature tensile strength, and the bend ductility of Thermenol. The alloy is made oxidation-resistant through the use of aluminum.
Date: August 2, 1954
Creator: Gyorgak, Charles A.
System: The UNT Digital Library