Abstract: A gas/liquid separator for separating entrained gases such as air from lid such as oil in hydraulic systems under extreme flight conditions is provided. High density liquid substantially devoid of gas bubbles is forced toward the perimeter of a liquid chamber through centrifugal force by imparting rotational velocity to incoming liquid, causing low density air-entrained liquid and large gas bubbles to collect in the center of the chamber. The high density liquid is discharged from an upper slot in the chamber while liquid with entrained gas bubbles is urged centrally upward into a second chamber where further separation occurs. Gas-free liquid from the upper chamber is collected and discharged centrally within opposed outlets communicating with the slot to provide a pumping action which augments liquid flow into and out of the upper chamber. Gas is bled from the upper chamber.

Abstract: A fluid-powered control system of a type employing redundant control channels and multiple fluid signal amplifiers. Each fluid amplifier has two fluid outlets having communication with respective portions of a movable, force summing structure but having no communication with the other amplifiers. A respective, differential pressure monitoring device is connected between a source of fluid under pressure and each fluid amplifier and is operative to shut off fluid flow to the respective, associated, fluid amplifier upon the occurrence, across the outlets of the fluid amplifier, of a differential pressure exceeding a predetermined level.