pub const SUBSONIC_MACH_LIMIT: f64 = 0.8;Expand description
The top of the subsonic region, Mach 0.8 (Niskanen 2009 Table 3.1, p. 19), where Niskanen’s
semi-empirical transonic method starts (p. 47): the lower bound M_L of a step’s and a blunt
face’s transonic method (crate::nose_drag::PressureDragCurve::step).