MANY problems associated with aircraft investigations involve the accurate measurement of fluctuating fluid pressures. Various types of pickup exist from which choice may be made for this purpose. The suitability of a particular type for a specific application depends on the characteristics of the type and its associated electronic recorder. The fundamental requirements of fluctuating pressure pickups are discussed, and various types are described and typical examples of their application are given. Design data are derived based on experiments conducted on condenser type pickups, from which it is possible to design single diaphragm types for particular frequency and sensitivity requirements.
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