An apparatus for use in an aircraft for determining and displaying a reading which is indicative of pressure density at any instant in time, comprises sensing means for determining both ambient air pressure and ambient air temperature at any instant in time, and outputting an electrical signal having...http://www.google.es/patents/US6449573?utm_source=gb-gplus-sharePatente US6449573 - Apparatus to calculate dynamic values for pressure density in an aircraft
Apparatus to calculate dynamic values for pressure density in an aircraft
