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Defense Technical Information Archive

The Defense Technical Information Center (DTIC) is the premier repository for research and engineering information for the United States Department of Defense. DTIC's Suite of Services is available to DoD personnel, defense contractors, federal government personnel and contractors and selected academic institutions. The general public can access unclassified, unlimited information, including many full-text downloadable documents, through the public Web site, DTIC Online.



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The lateral and directional behavior of the Canberra PR 3 VX 181 during survey flights is discussed. Flight trials showed that even under calm air conditions a short-period oscillation in heading and angle of bank existed with both the period (2 to 4 sec.) and the magnitude varying with M no. and altitude. General wanders in heading and bank also appeared to be independent of M no. and, in the case of angle of bank, independent of altitude for the time intervals between successive photographs...
Topics: DTIC Archive, KEYES, H J, AEROPLANE AND ARMAMENT EXPERIMENTAL ESTABLISHMENT BOSCOMBE DOWN (UNITED...
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A study was made of the possibility of the development of phosphor- bronze and partially superconducting metallic bolometers for operation at very low temperatures. Measurements were made of the current-noise power in Ta and leaded phosphor-bronze in the liquid He-temperature region, the noise power being obtained as a function of the frequency of observation from 200 to 4000 c. p.s. No current noise was observed in Ta in the normal or superconducting states at 4.2 deg K. In the intermediate...
Topics: DTIC Archive, DAUNT, J. G., KAPLAN, BERNARD, OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS,...
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Studies are to be made on the fluctuations in small areas of daytime sky, the quality of scattered blue daylight sky, and the extension of daytime and nighttime astronomical seeing to the near infrared. A photoelectric photometer was designed to make a permanent record of the behavior of areas observed by the 12.5-in. refracting telescope. The photometer uses a 1P21 photomultiplier tube, and has interchangeable filters and diaphragms and a solid CO2-cooled tube chamber. Illumination patterns of...
Topics: DTIC Archive, Hynek, J. Allen, OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS, *STARLIGHT,...
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Topics: DTIC Archive, Harper, John B., MASSACHUSETTS INST OF TECH CAMBRIDGE INSTRUMENTATION LAB, *AIRCRAFT...
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Equipment is being developed for the recording and analysis of fluctuations in brightness and color of starlight and daylight, with emphasis on daytime observations. The observations are to provide a possible basis for the study of upper atmospheric conditions from the ground. Eight apertures were calibrated by determining the ratios of the photoelectric signals received from an artificial constant source. A search of daytime sky was made with a photometer having a diaphragm which was made with...
Topics: DTIC Archive, Hynek, J. A., OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS, *SKY BRIGHTNESS,...
Topics: DTIC Archive, Kochin, N E, NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON DC, *CIRCULAR...
Topics: DTIC Archive, Kochin, N E, NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON DC, *CIRCULAR...
The problems encountered in the development of the AFQT are summarized, and the outcome of attempts to solve the problems is described. Experience with earlier tests is discussed to permit a better understanding of the development of the AFQT. A comparison of the AFQT scores obtained under operational conditions and under standard conditions indicated the following: (1) slippage occurred in the operational scores for enlistees and inductees as indicated by the pile-up of scores at the...
Topics: DTIC Archive, Uhlaner, J. E., Bolanovich, Daniel J., ADJUTANT GENERAL'S OFFICE (ARMY) WASHINGTON...
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The design of an optimum filter is postulated to be difficult when synthesis is attempted on a frequency-response basis. If synthesis is carried out on an impulse-responce basis, this type of filter can be very nearly approximated by a tapped delay line, weighting networks, and an adding circuit. A formula derived for setting the threshold voltage in the pulse-train correlator appears to combat satisfactorily the effect of pure constant- amplitude pulse jamming. A pulse-train generator was...
Topics: DTIC Archive, Stubbs, H. L., Nardone, L. J., Wiren, J., Rochefort, J. S., Lob, W. H., Bovarnick, M....
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The thermionic and photoelectric emissions were measured as Cs was added to an oxidized Ag sheet. Two photoelectric and 2 thermionic emission maxima were found, but their yields were not proportional. The gross Cs/O atomic ratio was generally less than 2.0 throughout the time range for which the infrared response (photoelectric emission) was appreciable. At the maximum thermionic emission the Cs content was less than that corresponding to Cssub2O, which supports the hypothesis that Cssub2O is...
Topics: DTIC Archive, LASSETTRE, E. N., OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS, *EMISSION,...
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The multiple-choice performance maze, the electromaze, is an application of switching circuits and requires no overt verbal, mathematical, or figure symbols characteristic of paper-and-pencil mental tests. The apparatus was used as a reasoning test for the comparison of graduate students in physics and journalism. On the basis of the statistical analysis, it was concluded that there were no significant differences in the abilities of both types of graduate students as revealed by their...
Topics: DTIC Archive, KRUGLAK, HAYM, SCHENSTED, CRAIGE E., SELF, HERSCHEL C., MINNESOTA UNIV MINNEAPOLIS,...
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Seven electromaze problems were administered to Physics and American Studies majors. All but 1 physicist completed the problem series; more than 1/4 of the American Studies group could not solve 1 or more problems. There were significant differences between the variabilities and the means of the trials for the first 2 problems, but no significant differences between the means of time scores. The correlation between the total time and the number of moves was significant for the physicists, but...
Topics: DTIC Archive, KRUGLAK, HAYM, MINNESOTA UNIV MINNEAPOLIS, *REASONING, *EXPERIMENTAL PSYCHOLOGY,...
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Topics: DTIC Archive, GENERAL ELECTRIC CO SCHENECTADY NY, *AUTOMATIC PILOTS, AIRCRAFT
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Investigation was made of the electrical conductivity of crystalline ThOsub2 in different gases at atmospheric pressure. In general, the values of conductivity obtained when the crystal was heated in an H atmosphere followed the usual temperature dependence for a semiconductor: Sigma = A exp.(-eV/kT). The conductivity in O was noticeably higher. The effect of passage of current on conductivity and color was determined at 2 temperatures for crystals heated in O. The current passed at 675 deg C...
Topics: DTIC Archive, WEINREICH, O. A., DANFORTH, W. E., GOLDWATER, D. L., FRANKLIN INST NEWARK DE BARTOL...
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Analysis of the results of dynamic tests on a natural rubber of 27 to 30 durometer hardness indicated that the phenomena were essentially viscous and that the rubber displayed only slight hereditary effects. Formulas for the rubber specimens tested and a summary of their physical properties are given in an appendix.
Topics: DTIC Archive, EUBANKS, R.A., MUSTER, D., VOLTERRA, E.G., ILLINOIS INST OF TECH CHICAGO, *DYNAMIC...
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The report is based on the campaign of the winter of 1950-51 in which the 9th Army experienced its greatest and most prolonged stress. It is divided into 3 parts; the behavior of men in the use of weapons, the behavior of weapons as men use them, and the use of information in augmenting fighting power.
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Topics: DTIC Archive, MARSHALL, S.L., RESEARCH ANALYSIS CORP MCLEAN VA, *KOREAN WAR, WEAPONS, INFANTRY,...
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The capabilities of the infantry rifle were explored. Data wer e obtained on the frequency and distance by which riflemen missed targets, and the distribution of hits at different ranges; the ranges of engagement in battle; and the physiological wound effects of shots with differing ballistic characteristics. A study of the data led to the following conclusions: (1) Hit effectiveness with the M-1 rifle is satisfactory only up to 100 yds. and declines rapidly to low order at 300 yds., the...
Topics: DTIC Archive, Hitchman, Norman A, Forbush, Scott E, Blakemore, Jr, George J, RESEARCH ANALYSIS CORP...
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An analysis was made of social responses to the Texas City explosion (April 1947); tornadoes in Woodward, Antlers, Holdenvill, and Sasakwa, Okla.; and a holocaustal fire in a dormitory at the Univ. of Okla. Attention was given to (a) the reactions of participants; (b) the functioning of existing disaster- control organizations; and (c) the individual and group-rehabilitation problems. A research team attempted to obtain authoritative accounts of the histories of the disasters from participants....
Topics: DTIC Archive, LOGAN, LEONARD, KILLIAN, LEWIS M., MARRS, WYATT, OKLAHOMA UNIV RESEARCH INST NORMAN,...
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Buckling tests were conducted on thin- and thick-walled sandwich cylinders under bending loads. Cylinders were constructed with cores weak in shear (cellular cellulose acetate, CCA) and cores strong in shear (end-grain balsa, EGB) to check the validity of theoretical procedures for predicting over-all buckling and wrinkling. The 1/8-in.-thick sandwich was considered to have the minimum thickness feasible. To study the wrinkling behavior of cylinders under bending loads, a 1/2-in.-thick sandwich...
Topics: DTIC Archive, GERARD, GEORGE, NEW YORK UNIV NY COLL OF ENGINEERING, *BUCKLING, *SANDWICH...
Trigonometric identities most frequently encountered in synchro analysis are tabulated, and methods of manipulation useful in their derivation are given.
Topics: DTIC Archive, Weiss, G. H., NAVAL ORDNANCE LAB WHITE OAK MD, *SYNCHROS, TRIGONOMETRY, IDENTITIES.
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The improvement of the reliability of IFF systems is being studied. This report is an investigation of the communication aspects of the ground-to- air IFF system. Factors affecting reliability are atmospherics, receiver noise, inadequate space resolution, garbling, and jamming and deception on the part of the enemy. The last factor was given prime consideration. Examples are given of the use of redundancy coding to improve the reliability of pulse-train transmissions in the presence of noise,...
Topics: DTIC Archive, ESSIGMANN, M. W., ROCHEFORT, JOHN S., Stubbe, Harold L., Lob, Walter H., NORTHEASTERN...
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N sub2 H sub4 derivatives: The f.p. of N sub2 H sub3 Me (I) wa s calculated as -56.08 deg. C; the eutectic for the system I-N sub2 H sub4 occured at 85 wt.-% I and -64 deg. C. Neutralizing I.H sub2 SO sub4 with KOH yielded 95. 6% I. The formation of trimethylazonium bromide in the reaction of N sub2 H sub4 and MeBr was not prevented by using 0.5 M Me Br to 1.0 M N sub2 H sub4 or by lowering the reaction temperature to 0 deg. C. The method adopted for seperating N sub2 H sub4,...
Topics: DTIC Archive, EATON, C. B., GRAEFE, A. F., Harkee, J. F., Moss, L. K., Mueller, K. H., Sanborn, R....
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The stability of 4 types of 2-dimensional free-surface flows of an ideal fluid was investigated when subjected to small perturbations. The perturbations of a hollow vortex flow bounded by cylindrical walls were neutrally stable; the propagation of these perturbations is compared to the propagation of gravity waves in H2O. The impinging of a jet on a plate of finite width was also a stable configuration. A series of orifice flows had stable perturbations with the exception of an isolated...
Topics: DTIC Archive, FOX, J. L., MORGAN, G. W., BROWN UNIV PROVIDENCE RI DIV OF APPLIED MATHEMATICS,...
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A new method for the determination of nitrate in sea water, based on the polarographic reduction of nitrate in the presence of uranyl ions, was investigated. It was found that sulfate ions depress the reduction current by a definite proportion depending on the chlorinity of the water sample. Chlorinities in the range of 14 to 19 parts per thousand gave a constant effect. Fluoride interfered strongly with the reduction of nitrate, but the use of A1 or ZrO salts satisfactorily eliminated this...
Topics: DTIC Archive, CHOW, TUNG-WHEI, ROBINSON, REX J., WASHINGTON UNIV SEATTLE, *TEST AND EVALUATION,...
The Picture Interpretations, Army Picture Story, and Picture Fi ll-In tests were administered to 216 West Point cadets and 958 enlisted men in Leaders' Schools and evaluated as predictors of leadership ability. In addition, the West Point Personal Inventory was administered to the cadets and the Leaders' Self-Description Blank to the enlisted men. The total test scores were compared with an independent measure of leadership, the Aptitutde-for-Service Rating for cadets and the associate rating...
Topics: DTIC Archive, Katzell, Raymond A., Kirkpatrick, James J., Carleton, Fredrick O., Rosenberg, Nathan,...
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Differential-equation, variational, and integral-equation methods for determining natural modes and frequencies of transverse vibration of beams are outlined, and their limitations are discussed. The methods described are applicable to straight beams with symmetric cross section which vibrate in the plane of symmetry. They yield satisfactory results for modes whose half-wave length is long in comparison to the average height of the beam.1
Topics: DTIC Archive, MUELLER, EDWARD A., MASSACHUSETTS INST OF TECH CAMBRIDGE, *VIBRATION, LENGTH,...
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Single small-angle grain boundaries: small-angle boundaries we re introduced in 1.2-in. -thick disk-shaped specimens formed by cleaving spherical Zn crystals. Load was applied at the midspan of a specimen, which was supported as a simple beam and heated to 350 deg C, by a knife edge perpendicular to the basal plane. With the crystal loaded as a cantilever beam, the boundary moved toward the supports under shearing stress, and the calculated critical shear stress for the boundary shear stress...
Topics: DTIC Archive, LI, CHOH HSIEN, EDWARDS, EUGENE H., Washburn, Jack, Parker, Earl R., CALIFORNIA UNIV...
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The creep properties of Al-Cu alloys containing dispersions of CuAl sub 2 in the alpha solid-solution matrix of Al were primarily dependent on the volumetric mean free path () between the CuAl sub 2 particles and independent of minor variations in composition (3 to 5% Cu) and heat treatment. The creep stress correlated with the creep rate-temperature parameter Z = epsilon sub s sub e delta H/RT, where sub s is the secondary creep rate, delta H the activation energy, R the gas constant, and T...
Topics: DTIC Archive, GIEDT, WARREN H., SHERBY, OLEG D., DORN, JOHN E., CALIFORNIA UNIV BERKELEY MATERIALS...
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Model Shop work on Radio Central parts in process was continued, a)narrow-band 15 mc I.F. strip for intercept, b)Narrow-band 15 mc I.F. strip for scanning, 3)Wide-band 15 mc I.F. strip for intercept.
Topics: DTIC Archive, LANE, W. C., ITT FEDERAL LABS NUTLEY NJ, *AIR CONDITIONING EQUIPMENT, SALT SPRAY...
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Approximate expressions for the maximum bomb-release range and the maximum clearance from impact point for bombs released from fighter aircraft are derived as functions of speed and lead angle. Values for various speeds from 300 to 700 knots are tabulated for a 12 deg lead. The shape of the K-19 bombing path and its operation limits in the bombing mode are discussed as well as the compensation provided for wind and target velocity.
Topics: DTIC Archive, JOHNSON, F. V., GENERAL ELECTRIC CO SCHENECTADY NY, *FIGHTER AIRCRAFT, LIMITATIONS,...
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Topics: DTIC Archive, MANDEVILLE, C. E., SWANN, C. P., FRANKLIN INST NEWARK DE BARTOL RESEARCH FOUNDATION,...
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Vapor-droplet tests were conducted with the system Nsub2Hsub4 v apor- Hsub2Osub2 droplets, 95% materials being used. The time delay to reaction was greater than 450 msec., compared to an ignition delay of 295 msec. for 92% Hsub2Osub2. The difference in observed delay was attributed to trace catalysis. The probability of locating trace catalysts capable of producing extremely short time delays was considered excellent. The maximum leakage of the M-6D seal, upon quasi-static tests to 5000 p.s.i....
Topics: DTIC Archive, CALCOTE, HARTWELL F., FLEISCHHAUER, E. T., TEXACO EXPERIMENT INC RICHMOND VA, *SHORT...
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The possibilities were investigated of a modulation system for teletype which distributes the transmitted energy uniformly over a frequency band with the idea that such a system would be less affected by fading and meteors than a frequency shift keying (FSK) system. When fading occurred, noise appeared at only 1 or 2 values of instantaneous modulating voltage, which appearance indicated that the fading was frequency selective in nature. A system of modulation which spreads the transmitted...
Topics: DTIC Archive, GRAY, DONALD J., MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB, *TELETYPE SYSTEMS,...
Preliminary creep tests at 1150 deg F indicated 2 types of defo rmation patterns in an 80/20 Ni/Cr alloy; the slip bands were sharply bent and continuous across the twin boundaries in one pattern, but existed only faintly and were zigzagged in the other. Aging was investigated for air-melted, homogenized alloys containing upto 4% Al and Ti after Hsub2O-quenching from 2000 deg F. Two types of precipitate occurred after aging at 1250 deg to 1650 deg F: (1) a fine precipitate of spheroidal shape...
Topics: DTIC Archive, CHANG, H. C., NORDHEIM, R., GRANT, N. J., MASSACHUSETTS INST OF TECH CAMBRIDGE,...
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An investigation was conducted to determine the flight characteristics of a sailplane equipped with a trailing edge suction slot and special wing tips. An experimental, iterative method was used to locate and shape the upper-surface openings on the tips for high suction-pressure production. A drag polar determination showed no improvement in performance with the automatic trailing-edge suction; the maximum lift coefficient was no higher than that for a plain wing. Trailing-edge suction applied...
Topics: DTIC Archive, RASPET, AUGUST, MISSISSIPPI STATE COLL STARKVILLE ENGINEERING RESEARCH STATION, *WING...
The effect of Pu and Fe on the fluorescence of U in NaF melts illuminated by UV was measured over a range of concentrations. The transmission of NaF to UV light at different lambda's shows that NaF alone and in combination with Fe has no absorption bands. NaF containing U displays a wide absorption band in the UV. Evidence is presented that Fe has a strong quenching action but does not quench by light absorption. Additional results show that the spectrum of the enhanced fluorescence of U does...
Topics: DTIC Archive, WALTON, G. N., HUTTON, G., DALZIEL, J. A., ATOMIC ENERGY RESEARCH ESTABLISHMENT...
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Topics: DTIC Archive, Friedman, L., Ley, D., Zeldin, L., Shechter, H., OHIO STATE UNIV RESEARCH FOUNDATION...
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The formation of solid SiO from Si and SiOsub2 was observed fro m x- ray diffraction patterns. At 1250 deg C, no SiO formed; at 1300 deg C, the mixture of Si and SiOsub2 completely transformed into SiO after heating for about 9 hr. The intensity of the Si diffraction lines decreased during this period, while the intensity of the SiO lines increased. The SiO was quenched from 1300 deg to 850 deg C in 2 sec to a mixture of SiOsub2, SiO and Si. Si had the same body-centered lattice at 1300 deg and...
Topics: DTIC Archive, HOCH, MICHAEL, JOHNSTON, HERRICK L., OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS...
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The lateral surfaces of the cerebral cortex in 11 cats were exposed. Measurements of the latency and sign of the action potentials in the auditory cortex which were evoked by click stimulation demonstrated a regularity of pattern of events. For 6 msec, no evoked activity was detected. Then an island of positive potential appeared in the anterior suprasylvian gyrus and, at subsequent msec intervals, wider areas showed this potential change. At about 9 msec most of the ectosylvian gyri developed...
Topics: DTIC Archive, MICKLE, WALTER A., ADES, HARLOW W., EMORY UNIV ATLANTA GA SCHOOL OF MEDICINE,...
Objective check-flight booklets were developed and tested in the presolo and basic-instrument stages. Reliability coefficients were computed from successive independent check rides on 100 students graded by the existing check-flight forms. The ride-ride reliability was not increased by the new objective forms. It was concluded that the complexity of the new forms made them impractical for routine use. More than 1 check flight should be given to provide reasonably accurate prediction.
Topics: DTIC Archive, WILCOXON, HARDY C., JOHNSON, WOODBURY, GOLAN, DAVID L., NAVAL SCHOOL OF AVIATION...
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Four groups, of 10 men each, took part in speech-intelligibility tests conducted during simulated altitude runs at 43,000 ft. About half of each group served as speaker-listeners at altitude, and the other half functioned as listeners at sea level. Each speaker said about 14 words from the multiple- choice intelligibility test, while the listeners crossed out 1 of 4 alternatives for each test word. Each man wore a helmet with 1 earphone, while the other ear was open to the noise environment of...
Topics: DTIC Archive, ATKINSON, CHESTER J., OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS, *AIRCRAFT NOISE,...
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Topics: DTIC Archive, WINKLER, EVA M., NAVAL ORDNANCE LAB WHITE OAK MD, *HYPERSONIC WIND TUNNELS,...
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Topics: DTIC Archive, NAVAL RECONNAISSANCE AND TECHNICAL SUPPORT CENTER WASHINGTON DC, *BIBLIOGRAPHIES,...
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The decrease of air-blast peak pressure with distance along the water surface was studied for shallow underwater explosions. Peak pressures were obtained from shock-front velocity measurements by using the Rankine-Hugoniot equation. The shock-front velocity and sound velocity were determined from measurements taken directly from the film record. The slopes of the pressure- distance curves for the region observed (45 to 200 charge radii) were lower than those from a charge in the air. The...
Topics: DTIC Archive, NIFFENEGGER, C. R., NAVAL ORDNANCE LAB WHITE OAK MD, *WATER, PEAK VALUES, EXPLOSIVE...
Response measurements were made of various pressure transducers, transducer fittings, and coupling systems using pressure-step function, sine- wave pressure, and absolute calibration techniques. The accurate standard methods of transducer-system evaluation demonstrated that these systems may be treated as lumped systems. A capacitance-type transducer with a long polyvinyl catheter was used as the test system for consideration of a transducer system with more than 1 degree of freedom....
Topics: DTIC Archive, PARNELL, JOHN, BECKMAN, EDWARD. L., PETERSON, LYSLE H., NAVAL AIR DEVELOPMENT CENTER...
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Fluorine-containing silicones were synthesized by reacting an F - containing Grignard reagent with SiClsub4, or tetraethyl silicate, and hydrolyzing the monomer silane product. The F-containing styrenes (3-(trifluoro-methyl)stryene, 3,5,-bis(trifluormoethyl)styrene, and 2,5,-bis(trifluoromethyl) styrene) were copolymerized with butadiene by an emulsion technique. These materials are to be evaluated as low-temperature, fuel-resistant elastomers. A literature review of fluorinated styrenes and...
Topics: DTIC Archive, PIERCE, O. R., MCBEE, E. T., PURDUE RESEARCH FOUNDATION LAFAYETTE IN, *LITERATURE...
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Two high-intensity air-borne sound generators, a siren and a je r T- type whistle, were used to study the effects of sound on liquid suspensions of bacteria. Special techniques and exposure chambers were developed. Lethal effects and cellular disruption were most obvious wit certain strains of Micrococcus pyogenes var. aureus, but they were irreproducible over a period of months. The experiments failed to elucidate the mode of action of the acoustic field in producing a sharp threshold for the...
Topics: DTIC Archive, KINSLOE, HELEN L., ACKERMAN, EUGENE, REID, JAMES J., PENNSYLVANIA STATE UNIV...
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A covered wagon launcher was built as a solution to the problem of inflating and launching large Moby Dick plastic balloons in adverse weather conditions. The unit employs a 40-ft. flat bed as a base with a headboard and side framewoek constructed of pipe and angle iron covered with canvas. An airplane cloth cover forms the top piece. The gas bubble is inflated inside the covered wagon and released by removing one side and the headboard connections of the top cover. Thirty-two test flights and...
Topics: DTIC Archive, Gildenberg, Bernard D., AIR FORCE MISSILE DEVELOPMENT CENTER HOLLOMAN AFB NM, *GASES,...
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Research on plastics for aircraft proceeded by deriving design criteria mathematically and then checking them by test. Abstracts are presented of the 13 reports issued under the program.
Topics: DTIC Archive, COLEMAN, DONALD G., FOREST PRODUCTS LAB MADISON WI, *AIRCRAFT, .
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Research was conducted to develop electrodeposited coatings sup erior to Zn and Cd plate for aircraft steel parts, particularly in tropical regions. A 50% Mn-50% Zn coating, superior to Zn under wet-dry cabinet conditions, was prepared by heat-treating a duplex coating of Mn and Zn electroplates to cause interdiffusion. Diffusion coatings of Mn-Sn alloys containing 40 to 60% Mn showed better inherent corrosion resistance than pure Mn. No sound Zn-Ag codeposits were obtained with either an...
Topics: DTIC Archive, Tripler, A. B., Jr., Bride, J. E., Gurklis, J. A., Fausi, C. L., BATTELLE MEMORIAL...
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Tests were made on 42- and 51-in. diameter rotorchutes with either 2 or 4 untapered and untwisted blades with airfoil section. The rotorchute which is an autorotating propeller was suggested for use instead of a parachute to decrease the descent velocity of free-falling loads. In vertical descent and proper autorotation tor rotorchutes had a drag coefficient referred to the rotor-disk area of 1.0 to 1.3 and a tip speed ratio (circumferential speed to sinking speed) of 4.4 to 9.3. The maximum...
Topics: DTIC Archive, HUBER, FRANZ J. A., AERONAUTICAL SYSTEMS DIV WRIGHT-PATTERSON AFB OH FLIGHT CONTROL...
Topics: DTIC Archive, WILLIAMS, BYRON L., WENDER, SIMON H., OKLAHOMA UNIV RESEARCH INST NORMAN,...
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Research was undertaken to describe the properties and identify the causes of the Rayleigh phenomenon accompanying expanding spark discharges. Specific attention was given to (1) the mechanics of the expansion, (2) the steps of energy transfer which lead to the production of excited atomic systems, and (3) the nature of these systems. The study indicated that suitably arranged low-pressure spark discharges are followed by an expansion of the ion cloud. The expansion is violent and generally...
Topics: DTIC Archive, FOWLER, RICHARD G., ATKINSON, WILLIAM R., OKLAHOMA UNIV RESEARCH INST NORMAN,...
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The resonance properties of small cavity antennas were investigated by studying their normal modes. The concept of q is discussed and defined in terms of the complex frequency. An equivalence theorem is developed which states that the field in a source-free region is equivalent to that produced by a double layer of surface currents, electric currents J = H x n, and magnetic currents K = n x E, where n is the outward normal. In addition to the boundary values, the inclusion of initial values is...
Topics: DTIC Archive, COHEN, MARSHALL H., OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS ANTENNA LAB,...
Range calculations were made for a long-range missile employing a ram rocket as the power plant. In this application the ram rocket could supply the thrust required to accelerate a missile to design conditions while consuming only a part of the propellant weight required by a comparable booster. The rocket would also supply power during the subsequent midcourse or Brequet trajectory. The ram rocket power plant was adapted to the structure of the Triton missile, a 2000-mi.-range ramjet using...
Topics: DTIC Archive, SUTHERLAND, GEORGE S., PRINCETON UNIV NJ JAMES FORRESTAL RESEARCH CENTER, *GUIDED...
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Measurements were made at several cathode temperatures (T) of t he emission current (I) received from photocells with pure Ti cathodes, upon their exposure to monochromatic ultraviolet light from a G.E. A-H6 high-pressure Hg- arc lamp. The frequency (nu) of the incident light varied from 2800 to 2450 A, and cathode temperature ranged from room temperature to 571 deg K. The photoelectric work function (phi) was obtained graphically from the Fowler (Phys. Rev. 38:45 and 838, 1931) expression...
Topics: DTIC Archive, Dalle Mura, Pio H., PRINCETON UNIV NJ, *TITANIUM, *PHOTOELECTRICITY, EMISSION,...
Topics: DTIC Archive, NEEL, JR, CARR B., NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON DC,...
Topics: DTIC Archive, ZIMMERMAN, C. H., HILL, PAUL R., KENNEDY, T. L., NATIONAL AERONAUTICS AND SPACE...
Topics: DTIC Archive, GELDER, THOMAS F., LEWIS, JAMES P., KOUTZ, STANLEY L., NATIONAL ADVISORY COMMITTEE...
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Topics: DTIC Archive, Dugger, Gordon L., Simon, Dorothy M., NATIONAL AERONAUTICS AND SPACE ADMINISTRATION...
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Topics: DTIC Archive, DUGGER, GORDON L., GRAAB, DOROTHY D., NATIONAL AERONAUTICS AND SPACE ADMINISTRATION...
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Topics: DTIC Archive, Henderson, Jr, Arthur, NATIONAL AERONAUTICS AND SPACE ADMIN LANGLEY RESEARCH CENTER...
Topics: DTIC Archive, LOPOSER, J. D., NATIONAL AERONAUTICS AND SPACE ADMIN LANGLEY RESEARCH CENTER HAMPTON...
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Topics: DTIC Archive, Kovasznay, Leslie S., NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON DC,...
Topics: DTIC Archive, MEAD, MERRILL H., NATIONAL AERONAUTICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES...
Topics: DTIC Archive, FOSTER, GERALD V., MOLLENBERG, ERNST F., WOODS, ROBERT L., NATIONAL AERONAUTICS AND...
Contents: Remarks on some fundamental features of detonation; Theory of lined hollow charges; Multiple fragment impact effects in shaped charge penetration; Initial study of the effects of annealing on the penetration performance of copper shaped charge liners; Generalizations concerning the motion of a thin shaped charge liner with an arbitrary initial contour; Sources of dispersion in shaped charge performance; Performance of peripherally initiated shaped charges; The performance of...
Topics: DTIC Archive, McLaughlin, Jr, Samuel C, ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD,...
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Contact lenses and spectacles were compared to determine their relative merits and applications. The contact-lens types studied were: (1) a plstic, fluid, corneal-scleral design; (2) a plastic corneal design; (3) a plastic, ventilated, fluidless corneal-scleral design, and (4) a glass, ventilated fluidless cornea-sclreal design. The fluidless, ventilated lens proved superior to either the fluid or corneal type. The plastic lens appeared to offer greater protection of the eye since the lens is...
Topics: DTIC Archive, MCGRAW, J. L., ENOCH, J. M., ARMY MEDICAL RESEARCH LAB FORT KNOX KY, *CONTACT LENSES,...
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Research is continuing on components and measuring techniques, crystal conversion loss and noise figure measurements, dielectric wave guides, flexible wave guides for TEsub01 waves, point contact rectifiers, Faraday rotation, millimeter-wave propagation and electronics, spatial harmonic amplifier, millimeter-wave LV reflex klystron, dielectrics as slow-wave structures for traveling-wave tubes in the millimeter and submillimeter ranges, extradigitron, backward wave oscillator, propagation in...
Topics: DTIC Archive, BELL TELEPHONE LABS INC WHIPPANY NJ, *ELECTRONICS, CONVERSION, PROPAGATION, SPATIAL...
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A 35% increase in cooling air inlet duct area increased the structural strength of the conical engines. Aluminum proved inadequate for fabrication of the cooling air baffle. The XPJ-49-AH-1 (AJ-7.5) inlet valve was tested 38 hrs. without failure. The valve tensiometer was fabricated, and the spring elements were calibrated. A set of lower frequency reeds and a multiple-pointfuel- injection system were designed and fabricated for the 10.0-in.-diam.engine. The thrust performance of 4 cowling...
Topics: DTIC Archive, BARRETT, W. K., FAIRCHILD ENGINE AND AIRPLANE CORP COSTA MESA CA FAIRCHILD...
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Data on Re are discussed under the topics: discovery and history; occurrence, abundance, and production; extraction; reduction to metal; consolidation and fabrication; physical properties; electronic properties; metallurgical properties; chemical properties; analytical chemistry of Re; electrodeposition; biological properties; and used of Re.
Topics: DTIC Archive, SIMS, C. T., WYLER, E. N., BATTELLE MEMORIAL INST COLUMBUS OH, *ELECTRONICS, METALS,...
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Experiments are described which were designed to observe the 2-dimensional displacement field in the soil during the indentation of a punch or footing and also to construct the pressure-penetration curve relating the pressure of the punch into the soil. The experiments were conducted mainly with sand, although a few were performed by using a garden soil and the commercial modelling clay, Plasteline. A special container was constructed with removable side panels of 1/2-in.-thick glass. A grid...
Topics: DTIC Archive, SYLWESTROWICZ, W., BROWN UNIV PROVIDENCE RI DIV OF APPLIED MATHEMATICS, *SOIL...
A summary is presented of existence and uniqueness theorems for the Navier-Stokes equations for incompressible fluids and related equations.
Topics: DTIC Archive, BARRAR, RICHARD B., HARVARD UNIV CAMBRIDGE MA, *FLUIDS, EQUATIONS, INCOMPRESSIBILITY.
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The strain energy for a thin cylindrical shell was derived by integrating Flugge's expressions for the strains (W. Flugge, Statik und Dynamik der Schalen, Edwards Bros. Inc., Ann Arbor, 1943) and approximating logarithmic terms by expanding in series of ascending powers and neglecting terms above the cubic. The differences from previously obtained expressions in the cubic terms are pointed out. The fundamental disagreements in the previous expressions are discussed.
Topics: DTIC Archive, BLEICH, H. H., DIMAGGIO, F., COLUMBIA UNIV NEW YORK, *SHELLS(STRUCTURAL FORMS),...
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An investigation is being made of the extent to which personal characteristics of team members differentiate effective from less effective teams. An Assumed Similarity (AS) score was obtained by asking a person to describe himself and to predict the self-description given by another person. It is suggested that the person who assumes similarity is a warmer, less critical person. Studies on basketball and surveyor teams indicated that effective teams prefer co-workers with low AS. Preliminary...
Topics: DTIC Archive, CRONBACH, LEE J., FIEDLER, FRED E., ILLINOIS UNIV AT URBANA BUREAU OF RESEARCH AND...