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Aerodynamic tests of an M-31 bomb in the 8-foot high-speed tunnel

Description: Report presenting aerodynamic tests of a 300-pound M-31 demolition bomb. Force tests at a range of angles of attack were made at Mach number 0.725, which corresponds to a speed of 810 feet per second at sea level. Results regard the drag, lift, and pitching moment are provided.
Date: August 1942
Creator: Baals, Donald D.
Partner: UNT Libraries Government Documents Department

Force Test of a 1/5-Scale Model of the Type GB-5 Controllable Glide Bomb

Description: Report presenting information regarding the development of a type GB-5 controllable glide bomb equipped with a target-seeking device. The model was tested on the six-component balance in order to measure the stability and control characteristics of the bomb in its original condition and with various modifications. Results regarding the effect of end plates on dihedral parameter, effect of vertical-tail arrangement on directional stability, aileron tests, and glide-path control are provided.
Date: March 27, 1944
Creator: Pitkin, Marvin
Partner: UNT Libraries Government Documents Department

An investigation of ejection releases of submerged and semisubmerged dynamically scaled stores from a simulated bomb bay of a fighter-bomber airplane at supersonic speeds

Description: Report presenting an investigation of the release characteristics of several dynamically scaled store shapes from a simulated bomb bay at Mach numbers of 1.39, 1.60, and 1.98. A streamline store, a blunt-nose store with wedge-type fins of low aspect ratio, and a bluff store with a skirt were tested. Results regarding pitching motions, ejection velocity, effect of increase in altitude, and addition of plate or spike to the nose of the store are provided.
Date: December 26, 1956
Creator: Lee, John B. & Carter, Howard S.
Partner: UNT Libraries Government Documents Department

An investigation of the afterbody pressure distribution and fin loading characteristics of a specialized store configuration at transonic speeds

Description: Report presenting an investigation in the transonic pressure tunnel to determine the afterbody pressure distribution and fin loading characteristics of two configurations of the TX-21 special weapon. The only different in the two configurations was the nose contour, with one having a hemispherical-flat shape and one with a double-radius ogive-flat shape. Results regarding the pressure port, fin loads, and force measurements are provided.
Date: August 1, 1956
Creator: Henry, Beverly Z., Jr. & Braden, John A.
Partner: UNT Libraries Government Documents Department

Measurement of static forces on internally carried bombs of three fineness ratios in flow field of a swept-wing fighter-bomber configuration at a Mach number of 1.61 with illustrative drop path calculations

Description: Report presenting a wind-tunnel investigation of bomb-release problems by measuring static forces for computation of bomb drop paths. Forces and moments were measured on bombs of three fineness ratios and on a swept-wing fighter-bomber configuration for several positions of the bomb under an open bomb bay. Results regarding contour paths and drop-path calculations are provided.
Date: January 10, 1957
Creator: Smith, Norman F. & Carlson, Harry W.
Partner: UNT Libraries Government Documents Department

Bomb trajectories

Description: The report is a mathematical treatise dealing with the trajectories of bombs of high terminal velocity, dropped from a great altitude.
Date: 1920
Creator: Wilson, Edwin Bidwell
Partner: UNT Libraries Government Documents Department

Time Variation of the Distance Separating Bomb and Dive Bomber Subsequent to Bomb Release

Description: A study has been made of the variation of the distance separating bomb and aircraft with time after release as applied to dive-bombing operations, Separation distances determined from this study are presented in terms of two variables only, dive angle and maximum airplane accelerometer reading; the values of separation distance include the effects of delay in initiation of the pull-out and lag in attainment of the maximum normal acceleration. Contains analysis and calculations of the separation distances between bomb and dive bomber following bomb release; separation distances as determined by the dive angle and the maximum airplane accelerometer reading are presented in a single chart.
Date: June 6, 1952
Creator: Mathews, Charles W.
Partner: UNT Libraries Government Documents Department

Wind-tunnel investigation of bomb-bay configurations intended to minimize the tumbling of light-weight bombs

Description: Report presenting an investigation in the 300 mph 7- by 10-foot tunnel to determine what modifications could be made to conventional bomb bays to reduce the tumbling difficulties experienced with light-weight bombs. The investigation indicated that there is a definite region of reversed flow inside the bomb bay which must be weakened or destroyed if good drops are to be obtained.
Date: June 25, 1947
Creator: Kuhn, Richard E. & Polhamus, Edward C.
Partner: UNT Libraries Government Documents Department

Wind-tunnel measurement of static forces on internally carried bombs of two different bluff shapes in the flow field of a swept-wing fighter-bomber configuration at a Mach number of 1.6

Description: Report discussing the influence of forces and moments on a fighter-bomber airplane with an open bomb bay and on two bluff bomb shapes in various positions below the fuselage and plane of symmetry. The wing was found to have a noticeable effect on bomb forces and that bluff bombs affect the longitudinal characteristics of the wing-fuselage combination.
Date: April 1, 1957
Creator: Geier, Douglas J. & Robins, A. Warner
Partner: UNT Libraries Government Documents Department

Investigation of the ejection release of several dynamically scaled bluff internal stores at Mach numbers of 0.8, 1.39, and 1.98

Description: Report presenting an investigation to determine flight behavior after ejection from a bomb bay of several dynamically scaled bluff internal stores for a range of Mach numbers and altitudes. The trajectories of all of the stores were smooth, but the pitching motions of the stores were greatly affected by the close vicinity of the bomb bay. Types of stores explored included WADC stores, flared-cylinder stores, and cylindrical stores.
Date: December 26, 1956
Creator: Carter, Howard S. & Lee, John B.
Partner: UNT Libraries Government Documents Department

Flight investigation of the aerodynamic derivatives and performance of control systems of two full-scale guided bombs

Description: Report presenting the aerodynamic stability derivatives and pitch and yaw control effectiveness of two full-scale guided bombs over a range of Mach numbers in free-flight drop tests. Results regarding performance information, roll control operation, and aerodynamic characteristics are provided.
Date: June 17, 1954
Creator: Seaberg, Ernest C. & Geller, Edward S.
Partner: UNT Libraries Government Documents Department

Effect of Variations in Reynolds Number on the Aerodynamic Characteristics of Three Bomb or Store Shapes at a Mach Number of 1.62 With and Without Fins

Description: Memorandum presenting tests in the 9-inch supersonic tunnel of three bomb or store shapes without fins and with two sets of cruciform fins. Measurements of normal force, chord force, and pitching moment were made; analyses of the effects of angle of attack and Reynolds number on these qualities and also upon center-of-pressure position and fin effectiveness are presented.
Date: June 25, 1953
Creator: Rainey, Robert W.
Partner: UNT Libraries Government Documents Department

The Gaseous Explosive Reaction: The Effect of Pressure on the Rate of Propagation of the Reaction Zone and Upon the Rate of Molecular Transformation

Description: This study of gaseous explosive reaction has brought out a number of important fundamental characteristics of the explosive reaction indicating that the basal processes of the transformation are much simpler and corresponds more closely to the general laws and principles of ordinary transformations than is usually supposed. The report calls attention to the point that the rate of molecular transformation within the zone was found in all cases to be proportional to pressure, that the transformation within the zone is the result of binary impacts. This result is of unusual interest in the case of the reaction of heavy hydrocarbon fuels and the reaction mechanism proposed by the recent kinetic theory of chain reactions.
Date: June 14, 1930
Creator: Stevens, F. W.
Partner: UNT Libraries Government Documents Department

Auto-Ignition and Combustion of Diesel Fuel in a Constant-Volume Bomb

Description: Report presents the results of a study of variations in ignition lag and combustion associated with changes in air temperature and density for a diesel fuel in a constant-volume bomb. The test results have been discussed in terms of engine performance wherever comparisons could be drawn. The most important conclusions drawn from this investigation are: the ignition lag was essentially independent of the injected fuel quantity. Extrapolation of the curves for the fuel used shows that the lag could not be greatly decreased by exceeding the compression-ignition engines. In order to obtain the best combustion and thermal efficiency, it was desirable to use the longest ignition lag consistent with a permissible rate of pressure rise.
Date: October 5, 1937
Creator: Selden, Robert F.
Partner: UNT Libraries Government Documents Department

A Comparison of Ignition Characteristics of Diesel Fuels as Determined in Engines and in a Constant-Volume Bomb

Description: Ignition-lag data have been obtained for seven fuels injected into heated, compressed air under conditions simulating those in a compression-ignition engine. The results of the bomb tests have been compared with similar engine data, and the differences between the two sets of results are explained in terms of the response of each fuel to variations in air density and temperature.
Date: June 1939
Creator: Selden, Robert F.
Partner: UNT Libraries Government Documents Department

A Constant Pressure Bomb

Description: "This report describes a new optical method of unusual simplicity and of good accuracy suitable to study the kinetics of gaseous reactions. The device is the complement of the spherical bomb of constant volume, and extends the applicability of the relationship, pv=rt for gaseous equilibrium conditions, to the use of both factors p and v. The method substitutes for the mechanical complications of a manometer placed at some distance from the seat of reaction the possibility of allowing the radiant effects of reaction to record themselves directly upon a sensitive film" (p. 3).
Date: 1923
Creator: Stevens, F. W.
Partner: UNT Libraries Government Documents Department

Measurement of static forces on internally carried bombs of three fineness ratios in flow field of a swept-wing fighter-bomber configuration at a Mach number of 1.61 with illustrative drop-path calculations

Description: Report presenting a wind-tunnel investigation of bomb-release problems by measuring static forces for computation of bomb drop paths. Forces and moments were measured on bombs of three fineness ratios and on a swept-wing fighter-bomber airplane for various positions of the bomb under an open bomb bay. The wing of the plane is shown to have a significant effect on the bomb forces before and after the bomb emerged from the bomb bay.
Date: January 10, 1957
Creator: Smith, Norman F. & Carlson, Harry W.
Partner: UNT Libraries Government Documents Department

Wind-Tunnel Investigation of the Effects on the Aerodynamic Characteristics of Modifications to a Model of a Bomb Mounted on a Wing-Fuselage Model and to a Model of the Bomb Alone

Description: An investigation was conducted in the Langley high-speed 7- by 10-foot tunnel to determine effects of modifications to a bomb model (particularly with regard to drag) when mounted on a wing-fuselage model and tested at Mach numbers from 0.70 to 1.10. In addition, the static longitudinal stability characteristics of several configurations of a larger scale model of the bomb alone were obtained over a Mach number range from 0.50 to 0.95.
Date: April 16, 1954
Creator: King, Thomas J., Jr.
Partner: UNT Libraries Government Documents Department

Corrosion Studies

Description: The following report focuses on the first run in a series of corrosion reports testing a solution of .5 M UO3 in 85% H3PO4.
Date: 1957
Creator: Phillips, John R.
Partner: UNT Libraries Government Documents Department

Zero-lift drag of a series of bomb shapes at Mach numbers from 0.60 to 1.10

Description: Report presenting zero-lift drag data obtained on a series of six bomb shapes. Five configurations had the same body shape with different body-surface conditions and profile and plan form of fins, and the sixth had a different and longer body shape. Results regarding the effect of blunt trailing edge, blunt leading edge, fin thickness, and body surface are provided.
Date: July 26, 1956
Creator: Stoney, William E., Jr. & Royall, John F.
Partner: UNT Libraries Government Documents Department

Flame Speeds and Energy Considerations for Explosions in a Spherical Bomb

Description: "Simultaneous measurements were made of the speed of flame and the rise in pressure during explosions of mixtures of carbon monoxide, normal heptane, iso-octane, and benzene in a 10-inch spherical bomb with central ignition. From these records, fundamental properties of the explosive mixtures, which are independent of the apparatus, were computed. The transformation velocity, or speed at which flame advances into and transforms the explosive mixture, increases with both the temperature and the pressure of the unburned gas" (p. 39).
Date: September 28, 1939
Creator: Fiock, Ernest F.; Marvin, Charles F., Jr.; Caldwell, Frank R. & Roeder, Carl H.
Partner: UNT Libraries Government Documents Department

Effects of External Fuel Tanks and Bombs on Critical Speeds of Aircraft

Description: "The danger of shocks and separation in high-speed flight due to the presence of externally carried fuel tanks and bombs is pointed out, and a rough analysis of the phenomena involved is attempted. A discussion is given of the application and limitations of the superposition methods for calculating local velocities in the region between the wing and the external stores, and for predicting critical Mach numbers. Some suggestions for improved designs are also presented" (p. 1).
Date: February 1946
Creator: Katzoff, S.
Partner: UNT Libraries Government Documents Department

The Cetene Scale and the Induction Period Preceding the Spontaneous Ignition of Diesel Fuels in Bombs

Description: In the present report a comparison is made between the scale obtained with mixtures of cetane and l-methyl naphthalene in a bomb, and that obtained with the same fuels in a Waukesha engine. The tests were conducted in a metal bomb heated by a Nichrome spiral. The fuel was injected into the bomb from a Bosch jet by means of a specially constructed plunger pump. The instant injection and the pressure curve in the bomb were registered by a beam of light which was reflected from a mirror connected to the needle of the jet and to a membrane indicator.
Date: December 1936
Creator: Michailova, M. N. & Neumann, M. B.
Partner: UNT Libraries Government Documents Department