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Hydraulic system provides smooth control of large tracking and antenna drive systems at very low tracking rates. This configuration modifies a series connection of the drive motors with compensating orifices to offset the effects of drain line loss. Linearization of response by eliminating cogging or cyclic operation is thus obtained.
Fatigue tests using load distributions from actual loading histories encountered in flight are programmed on punched electronic accounting machine cards. With this hydraulic loading system, airframe designers can apply up to 55 load levels to a test specimen.
Special isolator valve prevents malfunction of a closed hydraulic system by converting the initial accumulator-reservoir to a reservoir function only when the system loses oil, or gaseous nitrogen precharge, or has a jammed piston. This permits near-normal operation until the defect is corrected.
Hydraulic axisymmetric focused-jet amplifier for pneumatic digital control
Hydraulic exciter combined environment tests
Materials evaluation, design and fabrication work, and low pressure testing to develop high temperature hydraulic system actuator seals for use in advanced supersonic aircraft
Computer prediction of transient performance of low speed inducer driven by hydraulic turbine
Hydrodynamical and mechanical design layout for two-speed hydraulic turbine inducer, computer simulation of pumping system and test facility performance, and study of demonstration unit
Pumpability, lubricability, and durability of five hydraulic fluids at varying inlet temperatures to evaluate applicability for supersonic aircraft
Contamination effects and controls in Saturn launch vehicle hydraulic systems
Hydraulic compound vortex amplifier optimization
Fluidic control of high hydraulic pressure by means of hydrodynamic vortex phenomenon
Hydraulic fluid powered servo system designs for space applications, noting fluid characteristics and performance over wide viscosity and temperature change
Hydraulic calipers determine area of annular openings in irregular or concealed passages. With modifications the device could be adapted to investigations of cross-sectional changes in heat flow passages, ducts, conduits, and heat exchanger elements.
Fluidic vortex valves used as fluid control elements in hydraulic servoactuator control system
High temperature hydraulic system actuator seals for advanced supersonic aircraft - graphs
Analog and digital computer programs for predicting transient performance of inducer driven by hydraulic turbine
Computer model of dynamic inducer for hydraulic turbine drive