Accession Number : AD0906711

Title :   The Effect of Projectile Mass in Air to Air Gunnery.

Descriptive Note : Final rept. Jun-Aug 72,

Corporate Author : AIR FORCE ARMAMENT LAB EGLIN AFB FL

Personal Author(s) : Cobb, Kenneth K.

Report Date : OCT 1972

Pagination or Media Count : 40

Abstract : A general mathematical expression showing the effect of the variation of projectile mass on P sub ks (single shot kill probability for air to air gunnery) is set up. The expression is approximated to a simpler form which still is a function of many quantities. These include: the variation of p sub hs (single shot hit probability) with time of flight; the variation of P sub k/h (probability of a kill given a hit) with kinetic damage (mass multiplied by a rational integral power of the velocity), and mass of the explosive; the variation of the time of flight and impact velocity with the mass of the projectile. Some of these quantities cannot be determined because of the lack of data. In order to establish quantitative values for part of the problem, the expressions for the variation of the time of flight and the impact velocity with mass are derived. These variation are expressed in terms of the mass, drag coefficient, air density, and other parameters of the problem. Expressions are also obtained giving the required masses for minimum time of flight and maximum velocity. The concluding remarks concern a light projectile air to air gun system. (Author)

Descriptors :   (*AERIAL GUNNERY, PROJECTILE TRAJECTORIES), (*AIRCRAFT AMMUNITION, MASS), (*TERMINAL BALLISTICS, FACTOR ANALYSIS), WEIGHT, KILL PROBABILITIES, VELOCITY, IMPACT SHOCK, DRAG, AIR, DENSITY, KINETIC ENERGY, GUN BARRELS, INTERIOR BALLISTICS, EXTERIOR BALLISTICS.

Subject Categories : Ammunition and Explosives
      Fire Control and Bombing Systems
      Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE