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The visible condensation cloud that forms around an aircraft near the speed of sound is caused by the Prandtl-Glauert effect, a local drop in air pressure and temperature that condenses water vapor.

the verdict
SUPPORTED
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Recorded sources
3 sources for · 0 against

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Is it true that the visible condensation cloud that forms around an aircraft near the speed of sound is caused by the Prandtl-Glauert effect, a local drop in air pressure and temperature that condenses water vapor?

Yes. A reference article on vapor cones states that the visible cloud around an aircraft at transonic speeds is condensed water formed when localized air pressure and temperature drop below saturation. A separate aviation discussion confirms the Prandtl-Glauert factor describes the transonic pressure field, though it does not itself mention the condensation cloud.

Verdict: SUPPORTED · 3 sources for, 0 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 3
Vapor cone - Wikipedia
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Vapor cone - Wikipedia. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Vapor_cone

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More for · 2
What is the significance of the speed of sound to aerodynamics and aircraft design?
2016
Get citation
What is the significance of the speed of sound to aerodynamics and aircraft design?. (2016). aviation.stackexchange.com. https://aviation.stackexchange.com/questions/26439/what-is-the-significance-of-the-speed-of-sound-to-aerodynamics-and-aircraft-desi

The Invisibility of Steam
2014
Get citation
Jr., G. T. B. (2014). The Invisibility of Steam. eric.ed.gov. https://doi.org/10.1119/1.4897578

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