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DragTables

drag_tables

Drag tables for common projectile profiles.

Drag tables define the relationship between Mach number and drag coefficient for specific projectile shapes, allowing accurate ballistic calculations across the full velocity range from subsonic to supersonic.

This module provides standardized drag coefficient tables (\(C_d\) vs Mach number) for different projectile shapes and profiles commonly used in ballistics.

Standard Tables
  • TableG1: Flat-base bullet (most common sporting ammunition)
  • TableG7: Boat-tail, spitzer (long-range match bullets)
  • TableG2: Conical, banded, boat-tail artillery projectile
  • TableG5: Round-nose, boat-tail
  • TableG6: Flat-base, spire-point
  • TableG8: Flat-base, 10 caliber secant ogive
  • TableGI: Ingalls G1
  • TableGS: 9/16" smooth sphere
  • TableRA4: .22LR 40gr
Types

DragTablePointDictType: TypedDict for drag table data points

Functions:

Name Description
get_drag_tables_names

Returns list of available drag table names
Note
  • Drag coefficients are dimensionless and vary with velocity.
  • Mach numbers typically range from 0.0 to 4.0+ for ballistic applications.

Functions

get_drag_tables_names 
get_drag_tables_names() -> List[str]

List all available drag table names.

Returns:

Type Description
List[str]

List of drag table names as strings (e.g., ['TableG1', 'TableG7', ...])

Examples:

>>> tables = get_drag_tables_names()
>>> 'TableG1' in tables
True

DragTablePointDictType module-attribute 

DragTablePointDictType = TypedDict(
    "DragTablePointDictType", {"Mach": float, "CD": float}
)

TableG1 module-attribute 

TableG1: List[DragTablePointDictType]

TableG2 module-attribute 

TableG2: List[DragTablePointDictType]

TableG5 module-attribute 

TableG5: List[DragTablePointDictType]

TableG6 module-attribute 

TableG6: List[DragTablePointDictType]

TableG7 module-attribute 

TableG7: List[DragTablePointDictType]

TableG8 module-attribute 

TableG8: List[DragTablePointDictType]

TableGI module-attribute 

TableGI: List[DragTablePointDictType]

TableGS module-attribute 

TableGS: List[DragTablePointDictType]

TableRA4 module-attribute 

TableRA4: List[DragTablePointDictType]