Heavy Weapons Flashcards
A beaten zone can be what shapes?
- oval
- cigar
- density decreases towards the edges.
- effective beaten zone= 85% of rounds
The ____________ is between the muzzle of the weapon and the target.
Danger space
Max: 1.8 meters
Classes of MG Fire:
Respect to ground:
-Grazing fire
-Plunging fire. Respect to target:
- frontal
-flanking
-enfilade
- Oblique
Respect to weapon
-fixed fire, traverse, search, T&S, free-Gun
Grazing fire:
Come of fire rises less than 1 meter above ground. On level terrain grazing fire out to 600 meters. Danger space is from the end of the barrel out to the last round on the beaten zone.
Plunging fire:
Plunging fire occurs when the danger space is within the beaten zone.
Results in a loss of grazing fire at any point along the trajectory.
Frontal fire occurs when:
The long axis of the beaten zone is at a right angle to the front of the target.
Flanking fire occurs when:
The gunner fires at the side of the target.
Oblique fire occurs when:
The long axis of the beaten zone is at an angle other than a right angle to the front of the target.
Flanking enfilade occurs when:
The long axis of the beaten zone coincides or nearly coincides with the long axis of the target.
Fixed fire:
Delivered against a stationary point target when the depth and width of the beaten zone covers the target.
Traversing fire:
Fire distributes in width by successive changes indirection
Search fire:
Is distributed in depth by successive changes in elevation.
M249 max ranges (eff.)
Max range: 3600m Max eff range: bipod/point: 600m Tripod/point: 800m Bipod/area: 800m Tripod/area: 1000m Grazing fire: 600m Suppression: 1000m
M249 rates of fire:
Sustained: 50 RPM in 3-5 RB
Rapid: 100 RPM in 8-10 RB
Cyclic: 650-850 RPM
M240 max ranges:
Max range: 3725 m Max eff range: 1100 m Max grazing fire: 600m Area targets (bipod/tripod): 800 m/1100m Point targets (bipod/tripod): 600m/ 800m Tracer burnout: 900 m Suppression: 1800 m
M240 rates of Fire:
Sustained: 100 RPM in 6-9 RB
Rapid: 200 RPM in 10-13 RB
Cyclic: 650-950 RPM
Mk19 max ranges
Max range: 2212 m
Max eff range: 1500 m (point)/ 2212 (area)
Mk19 rates of fire
Sustained: 40 RPM
rapid: 60 RPM
Cyclic: 325-375 RPM
The____________ is the elliptical pattern formed on the ground or target by the striking rounds.
The beaten zone
Fire commands
- initial fire commands
- subsequent fire commands
- doubtful elements and corrections
- abbreviated fire commands
Factors that effect a burst of fire?
The gunner and rate of fire The gun and ammo Clarity of target Air/ weather Distance
What is line of sight?
Is an imaginary line, from the firer so eye through the sights, to the point of aim of the target.
A burst of fire is a____________?
Of successive rounds fired with the same elevation and point of aim, when the trigger is held to the rear.
Trajectory is?
The curved pathogens round takes during it flight.
-The trajectory of the round is effected by several factors.
What is maximum Ordinates?
Maximum ordinates is the highest point above the line of sight which a projectile rises during its flight
( it occurs about 2/3 of the distance from the weapon to the target and increases with the range)
What is cone of fire:
The pattern made by a group of rounds resulting from a burst of fire is the cone of fire.
( the pattern is caused mostly by the vibration of the MG and varies with ammo and atmospheric conditions)
