Installation of a caution, especially in the close of the ground, for air

摘要

1537263 Ground-proximity warning systems PLESSEY CO Ltd 23 Jan 1976 [30 Jan 1975] 4058/75 Heading B7W A visual or aural warning 9, 10 of a groundproximity warning system is actuated in dependence on aircraft air speed. The signal from an airspeed indicator 7 is fed through an analogue-to-digital converter 8 to a digital microprocessor.