Construct · 1 fields · 1 citations

sectional density: a standalone construct

One name. One construct. A landmark on the map.

● anchor · standalone construct Nearest construct by meaning·not indexed
sectionaldensity1 CONSTRUCTSectional densityMCCOY · MASS / AREA

A single standalone construct; nearby constructs are located against it in the Collider. Tap a field for its definition, unit, and measures.

Ballistics

A projectile's mass behind its frontal area

Sectional density is a projectile's mass divided by its cross-sectional frontal area, equivalently its mass divided by the square of its diameter. It captures how much mass stands behind each unit of frontal area, so a higher sectional density resists deceleration by air and tends to penetrate deeper into a target for a given shape. McCoy's Modern exterior ballistics treats it as the mass term that, combined with a form factor, yields the ballistic coefficient. The referent is a mass-per-area property of the projectile alone, independent of how fast it is going.[1]

Unit
Mass per frontal area (commonly lb/in² or kg/m²)
Recovery means
Not applicable
Measured by
Computed directly from the projectile's mass and diameter

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Nearby constructs

ballistic coefficient1 fields · 1 citationsanchor · standalone constructballistic2 fields · 2 citationsjingle · one word, two constructsdensity4 fields · 6 citationsjingle · one word, four constructs

References

  1. McCoy, R. L. (2012). Modern exterior ballistics: The launch and flight dynamics of symmetric projectiles. Schiffer Publishing. ISBN 9780764338250

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