Deflection analysis of damped rotors with harmonic support forces
Viscous damping and harmonic disturbing forces in rotors with critical speed, support deflection, and support phase angle determinations
Cavicchi, R. H.↗
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Theoretical analysis of a grid-translation beam deflection system for a 30-cm diameter Kaufman thruster
Analysis of ion beam thrust deflection system using grid translation techniques
Adam, W. B.↗
A 1000-hour test of a dual grid, electrostatic beam deflection accelerator system on a 5-centimeter-diameter Kaufman thruster
Dual grid accelerator system with electrostatic beam deflection capability tested on 5-cm diameter Kaufman thruster for 1000 hours
Lathem, W. C.↗
Large-scale wind-tunnel tests of a propeller-driven deflected slipstream STOL model in ground effect
Wind tunnel tests of propellor driven, deflected slipstream, short takeoff aircraft model to determine longitudinal and lateral-directional stability when in ground effect
Page, V. R.↗
Deflectable beam linear strip cesium contact ion thruster system
Deflectable dual beam, linear strip cesium contact, ion thruster system design and performance testing
Dulgeroff, C. R.↗
Permanent lunar surface magnetism and its deflection of the solar wind
Solar wind deflection due to permanent lunar surface magnetism
Barnes, A.↗
Laser beam deflection control: A concept
Improved control of laser beam deflection angles may result from new conceptual device. Reflectively coated magnetized particles are suspended in liquid-filled cell surrounded by two pairs of crossed electromagnetic coils and are selectively aligned by controlling magnetic fields. Ultrasonic energy source keeps particles suspended.
Garvie, C. L.↗
Light deflection
A telescope was designed and fabricated which constitutes the primary piece of instrumentation in an experiment to obtain an improved measurement of the gravitational deflection of light. A Mark 2 solar oblateness detector was also designed and built. A preliminary study was made of the problems associated with the parallax measurement of spectroscopic binaries, and it indicates that for these objects distances up to 10 to the 5th power pc night be measured.
Hill, H. A.↗
Noncontacting measuring device to indicate deflection of turbopump internal rotating parts
Noncontacting, nondestructive techniques to measure vibrations and deflections of parts in future LOX and LH2 multistage turbopump prototypes are reported. The measurements include shaft vibration, vibration of turbine wheel and blades, blade clearance, vibration of impellers, value component flutter, and vibration of face seal components. Three techniques were selected for development: ultrasonic Doppler devices, flash X-ray, and light-pipe reflectance.
Hamilton, D. B.↗
Dual deflectable beam strip engine development.
This paper describes a dual beam thruster that has been designed, constructed, and tested. The system is suitable for two-axes attitude control and is comprised of two orthogonal strips, each capable of producing 0.30 mlb thrust and beam deflections of more than plus or minus 20 deg. The nominal specific impulse for the thruster is 5000 sec, and the thrust level from each strip can be varied from 0 to 100%. Neutralizer filaments that were developed and life tested over 2000 hours producing more than 40 mA of electron emission per watt of input power are also discussed. The system power required for clean ionizers is approximately 200 W.
Dulgeroff, C. R.↗
Random deflections of a string on an elastic foundation.
The paper is concerned with the problem of a taut string on a random elastic foundation subjected to random loads. The boundary value problem is transformed into an initial value problem by the method of invariant imbedding. Fokker-Planck equations for the random initial value problem are formulated and solved in some special cases. The analysis leads to a complete characterization of the random deflection function.
Sanders, J. L., Jr.↗
Noncontacting devices to indicate deflection and vibration of turbopump internal rotating parts
The research is reported which was conducted to develop devices for measuring vibrations and deflections of parts, such as impellers, shafts, turbine wheels, and inducers in operating turbopumps. Three devices were developed to the breadboard stage: ultrasonic Doppler transducer, flash X-rays, and light-pipe reflectance. It was found that the X-ray technique is applicable to the shaft assembly and the turbine seal of the J-2 pump, and the light-pipe-reflectance device appears to be ideal for cryogenic pump sections.
Hamilton, D. B.↗
Large deflection elastic-plastic dynamic response of stiffened shells of revolution
The formulation and check out porblems for a computer code DYNAPLAS, which analyzes the large deflection elastic-plastic dynamic response of stiffened shells of revolution, are presented. The formulation for special discretization is by the finite element method with finite differences being used for the evaluation of the pseudo forces due to material and geometric nonlinearities. Time integration is by the Houbolt method. The stiffeners may be due to concentrated or distributed eccentric rings and spring supports at arbitrary angles around the circumference of the elements. Check out porblems include the comparison of solutions from DYNAPLAS with experimental and other computer solutions for rings, conical and cylindrical shells and a curved panel. A hypothetical submarine including stiffeners and missile tube is studied under a combination of hydrostatic and dynamically applied asymmetrical pressure loadings.
Stricklin, J. A.↗
Large deflection elastic-plastic dynamic response of stiffened shells of revolution
This paper presents the formulation and check-out problems for a computer code DYNAPLAS, which analyzes the large deflection elastic-plastic dynamic response of stiffened shells of revolution. The formulation for spacial discretization is by the finite element method with finite differences being used for the evaluation of the pseudo forces due to material and geometric nonlinearities. Time integration is by the Houbolt method or central differences. The stiffeners may be due to concentrated or distributed eccentric rings and spring supports at arbitrary angles around the circumference of the elements. Check-out problems include the comparison of solutions from DYNAPLAS with experimental and other computer solutions for rings and conical and cylindrical shells. A hypothetical submarine including stiffeners and missile tube is studied under a combination of hydrostatic and dynamically applied asymmetrical pressure loadings.
Stricklin, J. A.↗
Photogrammetric method of determination of deflection of light beams by porthole glass under space flight conditions
It is suggested that a measuring camera be used to determine the deflection of light rays through the glass portholes of hermetically sealed spacecraft. It is desirable that the camera have the greatest possible lens aperture diameter to increase the number and stellar magnitude of stars photographed. The article describes comparison of photographs within and outside the spacecraft and recommends similar tests in flight using oriented spacecraft.
Ziman, Y. L.↗
A STOL airworthiness investigation using a simulation of a deflected slipstream transport. Volume 1: Summary of results and airworthiness implications
A simulator study of short takeoff and landing (STOL) aircraft was conducted using a model of a deflected slipstream transport aircraft. The subjects considered are: (1) the approach, (2) flare and landing, (3) go-around, and (4) takeoff phases of flight. The results are summarized and possible implications with regard to airworthiness criteria are discussed. A data base is provided for future STOL airworthiness requirements and a preliminary indication of potential problem areas is developed. Comparison of the simulation results with various proposed STOL criteria indicates significant deficiencies in many of these criteria.
Stapleford, R. L.↗
Solar gravitational deflection of radio waves measured by very-long-baseline interferometry
Utilizing a four-antenna technique, simultaneous observations were made, at each end of an 845-km baseline, of the radio sources 3C279 and 3C273B, which are 10 deg apart in the sky. Differences in interferometric phases at 3.7-cm wavelength monitored near the time of the 1972 occultation of 3C279 by the sun, yielded a gravitational deflection of 0.99 plus or minus 0.03 times the value predicted by general relativity, corresponding to gamma = 0.98 plus or minus 0.06 (standard error).
Counselman, C. C., III↗
Simplified deflection-coil linearity testing
Mask placed over face of image-dissecting photomultiplier tube has precision array of pinholes that permit light to impinge on tube at known points. Signals are fed to deflection coil which sweeps beam across each point without complex operator procedures.
Kramer, G. P.↗