Aeronautic Instruments. Section III : Aircraft Speed Instruments (1923)
NASA Technical Reports Server (NTRS) · leaf 8
is. By their combined action these nozzles develop a larger differential pressure than either the Pitot or Venturi alone, but they are rather large and heavy. They are attached to one of the outer struts of the airplane with the supporting arm inclined downward at an angle of 45° to prevent water… … Fig. 3.—Venturi and Pitot-Venturi nozzles at the Bureau of Standards in collaboration with the Bureau of Aircraft Production. F is a double Venturi nozzle of French design. The Venturi tube, which is the upper of the two shown in the illustration, is stream lined on the outside. This nozzle was…
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