Compressibility modelling

[Crumpp]

based on the Prandtl factor

Depending on what your doing with the Prandtl-Glauert correction, you can vary velocity for example as much as ~75 mph TAS over measured results or even more depending on the design specifics.

The basic correction agreement between calculated and wind tunnel data for a tailess DC-9 for example shows the Prandtl-Glauert correction to be some 66 mph TAS pessimestic over measured results.