Module spin_decay 

Spin Decay Physics for Ballistics Calculations

This module implements realistic spin decay modeling based on:

• Aerodynamic torque opposing spin
• Calibrated roll-damping coefficients
• Velocity-dependent decay rates
• Projectile shape and surface-finish presets

Structs

SpinDecayParameters

Parameters affecting spin decay rate

Functions

calculate_moment_of_inertia

Calculate moment of inertia about the longitudinal axis

calculate_spin_damping_moment

Calculate the magnitude of the aerodynamic moment opposing spin.

calculate_spin_decay_correction_factor

Calculate a simple correction factor for spin-dependent effects

calculate_spin_decay_rate

Calculate the rate of spin decay in rad/s²

update_spin_rate

Calculate the spin rate after accounting for decay