Calculation of certain characteristics of extended air showers in the lower part of the atmosphere for large fluctuations of the elementary act
Inelastic interaction role in calculation of extended air shower characteristics
INELASTICITY↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Design of a three-axis attitude control system for a spacecraft acted upon by random perturbations Final report
Three axis attitude control system for spacecraft under random perturbations
Friedland, B.↗
Quick-acting backup tool for welding ducts
Alignment and backup tool facilitates butt welding of large-diameter ducts. It consists of a circular three-place segmented hoop, a pneumatic piston, and two shoes.
Johnson, L. L.↗
Fundamental radiochemical acts involved in the crosslinking of polymers Semiannual status report
Morphological and radiochemical studies of crystalline polyethylene
Mandelkern, L.↗
Superconducting ''transistor'' acts as high-speed switch
Cryogenic, three-terminal device yields current-voltage characteristics of ordinary transistor. Device consists of two superconducting tin rods in a crossed-wire geometry, separated by a thin gold film. New construction technique is described and possible applications are discussed.
Meissner, H.↗
Fast-acting, four-way slide valve
Valve is insensitive to fluctuating sense pressure. It remains in full-open position until the supply pressure is removed.
Absalom, J.↗
Optimization of self-acting step thrust bearings for load capacity and stiffness
Linearized analysis of finite width rectangular step thrust bearing for load capacity and stiffness
Hamrock, B. J.↗
Optimization of self-acting thrust bearings for load capacity and stiffness
Dimensionless load capacity and stiffness of step thrust bearings
Hamrock, B. J.↗
Double-acting shock absorber Patent
Shock absorber for landing gear of lunar or planetary landing modules
Blumrich, J. F.↗
An experimental study of high-speed rotors supported by air-lubricated foil bearings. I - Rotation in pressurized and self-acting foil bearings.
Air lubricated foil bearing support design with external pressurization for high speed rotor in high temperature turbomachinery
Licht, L.↗
Instant acting adhesive system
Adhesive developes 80 percent of minimum bond strength of 250 psi less than 30 sec after activation is required. Adhesive is stable, handles easily, is a low toxic hazard, and is useful in industrial and domestic prototype bonding and clamping operations.
Davis, T. R.↗
Optimization of self-acting herringbone journal bearings for maximum radial load capacity
Computer program for determination of optimal herringbone journal bearings for maximum radial load capacity
Fleming, D. P.↗
Experimental investigation of self-acting-lift-pad characteristics for main-shaft seal applications
Shrouded step pads for separating seal surfaces
Hady, W. F.↗
High speed, self-acting, face-contact shaft seal has low leakage and very low wear
Design adds gas thrust bearing to face of conventional face seal. Bearing lifts seal's carbon face out of contact after startup and establishes thin gas film between sealing surfaces. Operating pressure and speed capabilities are greater than those of conventional face seals.
Zuk, J.↗
High-speed, self-acting shaft seal (circumferential type)
Shaft riding circumferential seal is used with turbine engines under high pressure conditions. Construction of seal is discussed and schematic diagram to show operations is provided.
Ludwig, L. P.↗
Mathematical model of the solar radiation force and torques acting on the components of a spacecraft
General expressions for the solar radiation force and torques are derived in the vectorial form for any given reflecting surface, provided that the reflecting characteristics of the surface, as well as the value of the solar constant, are known. An appropriate choice of a spacecraft-fixed frame of reference leads to relatively simple expressions for the solar radiation forces and torques in terms of the functions of the sun-spacecraft-earth angle.
Georgevic, R. M.↗
A fast acting electrical servo for the actuation of full span, Fowler-type wing flaps in DLC applications: A detail design study
The philosophy and detail design of an electro-mechanical actuator for Fowler-type wing flaps which have a response time constant of 0.025 seconds are described. A conventional electrical servomotor with a power rating twice the maximum power delivered to the load is employed along with adaptive, gain-scheduled feedback and various logic circuits, including one to remove electrical excitation from the motor during extended periods when no motion of the flap is desired.
Smetana, F. O.↗
Optimization of self-acting step thrust bearings for load capacity and stiffness.
Linearized analysis of a finite-width rectangular step thrust bearing. Dimensionless load capacity and stiffness are expressed in terms of a Fourier cosine series. The dimensionless load capacity and stiffness were found to be a function of the dimensionless bearing number, the pad length-to-width ratio, the film thickness ratio, the step location parameter, and the feed groove parameter. The equations obtained in the analysis were verified. The assumptions imposed were substantiated by comparing the results with an existing exact solution for the infinite width bearing. A digital computer program was developed which determines optimal bearing configuration for maximum load capacity or stiffness. Simple design curves are presented. Results are shown for both compressible and incompressible lubrication. Through a parameter transformation the results are directly usable in designing optimal step sector thrust bearings.
Hamrock, B. J.↗