Function fineness_scaled_pressure_drag 

pub fn fineness_scaled_pressure_drag(
    c3: f64,
    c0: f64,
    fineness_ratio: f64,
) -> Result<f64, AeroError>

Eq. B.9’s fineness-ratio scaling, for shapes measured at fineness 3 (Niskanen 2009 p. 110):

(C_D•)_p = C₀ (C₃/C₀)^log₄(f + 1)

the curve a/(f + 1)^b (eq. B.7) through the blunt cylinder C₀ at fineness 0 (eq. B.2) and the measured C₃ at fineness 3. Stoney’s report “suggests that the effects of fineness ratio and Mach number may be separated” (p. 108).

Errors

AeroError::Domain for a negative or non-finite C₃ or fineness ratio, or a non-positive C₀.