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Aviation History
1947
1947 - 2223.PDF
iEED AIRCRAFT HYDRAULICS THE IDEAL electro-hydraulic selector valve full/ Patented Over-run control. All variations in stopping position, such as can arise from variation in voltage or friction., are overcome in an extremely simple but effective manner. A special type of switch is used to reverse the current in the motor, stopping it in two or more revolutions without the need for solenoids or brakes. Simplification of connections. The banjo connections, as shown, are carried upon the valve exterior and held up by a single nut: they can there- fore be orientated to any convenient angles for piping. Emergency over-ride. A clutch is provided to permit manual operation should the current fail, and is automatically re-engaged when electric actuation is resumed The weight of the complete motor, switch-gear and valve is i\ lbs., and the peak amperage is 3.5 at 24 volts d.c when working with hydraulic pressure of 2,500 p.s.i' (HIGH PRECISI^ON[|HYDRAULICSaa; AMOTIVE COMPANY LTD., LEAMINCTON SPA
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