Wikipedia:Articles for deletion/Prandtl–Glauert singularity
This ftp://ftp.demec.ufpr.br/CFD/bibliografia/aerodinamica/Bendiksen_2011.pdf Review of unsteady transonic aerodynamics article has a section on the singularity and in other sections discusses it's impact and relation to other singularities. This topic also occurs in textbooks, such as http://books.google.com/books?id=3KSUY-GYhFwC&pg=PA526&dq=%22Prandtl%E2%80%93Glauert+singularity%22+-wikipedia&hl=en&sa=X&ei=KFmCUtHSBqjX2AWEiYCoBA&ved=0CDAQ6AEwAQ#v=onepage&q=%22Prandtl%E2%80%93Glauert%20singularity%22%20-wikipedia&f=false. Beyond the technical definition of the term, ''Prandtl–Glauert singularity'' has come to be associated with the cloud of condensation occuring as an aircraft goes sonic; this has lead to use of the term in popular literature, such as http://books.google.com/books?id=jeqwkbLg_BsC&pg=PA162&dq=%22Prandtl%E2%80%93Glauert+singularity%22+-wikipedia&hl=en&sa=X&ei=KFmCUtHSBqjX2AWEiYCoBA&ved=0CDwQ6AEwAw#v=onepage&q=%22Prandtl%E2%80%93Glauert%20singularity%22%20-wikipedia&f=false Tom Clancy's Endwar and in numerous illustrations of the phenomenon. It's clear that the technical theoretical singularity along with the dramatic vapor cones are a notable topic. The article itself could use better sourcing, and it is not clear to me that this needs to be a breakout article from the parent Prandtl–Glauert transformation article, but neither of these are issues that would require deletion. A notable topic and surmountable article problems, per , suggest keeping the article
— User:Mark, 16:51, 12 November 2013 (UTC)
Stance: keep
Cited policy: WP:SURMOUNTABLE (Wikipedia:Arguments to avoid in deletion discussions)