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Predecessor to the Pitot Tube

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Jaybird180:
Some antique aircraft have something other than a pitot tube to measure airspeed, but I can't remember the name of the system.  It looks like a venturii.  Help me out with the name.

FastEddieB:

--- Quote from: Jaybird180 on February 19, 2016, 03:15:32 PM ---Some antique aircraft have something other than a pitot tube to measure airspeed, but I can't remember the name of the system.  It looks like a venturii.  Help me out with the name.

--- End quote ---

The thing that looks like a venturi is, in fact, a venturi. It uses Bernoulli's Theorem to "power" vacuum gyros:



Is that what you mean?

The only thing other than a pitot tube I can think of to measure airspeed is a spring-loaded paddle arrangement, like this:

Jaybird180:
Venturi was used on what airplanes?

FastEddieB:

--- Quote from: Jaybird180 on February 19, 2016, 04:18:23 PM ---Venturi was used on what airplanes?

--- End quote ---

Many, many older ones of all description.

Jaybird180:
You mean the Venturi wasn't used to measure airspeed but instead powered gyros???? How and why would a designer choose that setup?

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