Details of two new instruments; in Kelvin, Bottomley and Baird maximum safe airspeed indicator, pilot is told his air speed and also maximum safe air speed at which his craft may be flown at that altitude; Kelvin Mach meter indicates ratio between aircraft's speed and speed of sound at any particular altitude at which machine may be flying.
Sonic speed warnings
Flight
Flight ; 51 , n 2008
1947
Article (Journal)
English
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Sonic Speed on Pedestrian Dynamics: Relation between Sonic Speed and Density
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