CD_TO_RETARD

ballistics_engine::constants

Constant CD_TO_RETARD 

Source 
pub const CD_TO_RETARD: f64 = _; // 2.0489999999999999E-4f64
Expand description

Critical drag coefficient to retardation conversion constant

This fundamental constant converts drag coefficient (Cd) to ballistic retardation force. Value: 0.000683 * 0.30 = 0.0002049

Derivation:

  • 0.000683: Dimensional conversion factor from imperial ballistics units
  • 0.30: Empirical correction factor from extensive ballistics testing

Physical meaning: Proportionality constant in the ballistic coefficient equation: BC = (bullet_mass / bullet_diameter²) / (Cd / Cd_standard) Retardation = CD_TO_RETARD * Cd * air_density * velocity²

Sources: Classical ballistics theory (Pejsa, McCoy), validated against Aberdeen Proving Ground data and modern Doppler radar measurements.