Post on 11-Sep-2020
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5-Inch Shotgun Projectile5-Inch Shotgun Projectile(KE-ET)(KE-ET)
Luke Steelman, Code G32Naval Surface Warfare Center Dahlgren, VA
steelmansl@nswc.navy.mil(540) 653-4984 DSN: 249-4984
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Shotgun ProjectileOverview
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Shotgun ProjectileOverview
l Program initiated Fall ’02 as ademonstration in support of ADM Ulrich’sHip-Pocket Task Force
l Designed to combat threat of small high-speed craft
l Qualification testing is underway
l Shipboard test in June ‘03
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Engagement of Personnel Target
Shotgun ProjectileWhy We Started This Program
Increasing Range
q Includes all GWS errors for stationary targetsq Does not include moving target prediction error
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Shotgun ProjectileDesign
Nylon DRB*
WC 294*Expelling Charge
Cargo Body*
MK 432 Fuze*
Base Plug*(Modified with
Aluminum Insert)
Aluminum SpacersTo Reduce Weight
And Balance Projectile
13-Grain Tungsten AlloyShot Shell Pellets
(~9,000)Transfer*
Cup
* Existing parts from FY98 Procurement
Leveraged Off 5-Inch HE-ICM (Cargo) Projectile ProgramLeveraged Off 5-Inch HE-ICM (Cargo) Projectile Program
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l Structural FEA conducted on allnew partsØ Validated with 6 round test using
High Energy Propelling Charges – no anomalies
l Weight, CG, moments of inertiaall match or improve uponthose of the Cargo Projectileand HIFRAGØ Validated with ranging testØ Tighter dispersion than HIFRAG
and Cargo
Shotgun ProjectileDesign
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lModeled the dispense andflight of the shot shell pellets
lVisual Basic v6.0
lModeling parameters(sample):
Pellet Terminal KineticEnergy
Stop on RangeMeteorologicalConditions
Pellet Velocity VectorStop on TimePellet Physical Properties& Locations in Shell
Pellet Location Relativeto Burst Point
Surface ImpactProjectile TerminalConditions at Burst Point
OutputsTerminal ConditionsInputs
Shotgun ProjectileModeling and Simulation
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Fragments in Flight
Surface Impacts
Lineof
FireX
Y
X
Z
X
Z
Modeling & Simulation
Patterns Validated Against Empirical DataAccurate to 7.5% in Length, 3.5% in WidthPatterns Validated Against Empirical DataAccurate to 7.5% in Length, 3.5% in Width
Shotgun ProjectilePredicted Fragmentation Patterns
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High-Speed Video Capture of Airborne Fragment PatternJust After Expulsion
High-Speed Video Capture of Airborne Fragment PatternJust After Expulsion
Shotgun ProjectileModeling and Simulation
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Shotgun ProjectileLethal Area Program
l JTCG/ME Accredited Model
l Shows Lethal Areas of Blast and Fragmentation Warheads
Shotgun Projectile
Twice theLethalArea
HIFRAG
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l Monte Carlo Model (JTCG/ME Accredited)
l Random maneuvering path
l High speed target
l Personnel in open boat
l Personnel description meets ONI criteria
l MK 86 fire control error budget used
l X, Y, Z burst points for every round fired for allengagements
Shotgun ProjectileJoint Gun Effectiveness Model
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Shotgun ProjectileSimulated Engagement
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Shotgun ProjectileTarget Test
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Shotgun ProjectileTarget Test High-Speed Video
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F R O N T
Shotgun ProjectileTest Results
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l The KE-ET projectile shows, from bothtesting and modeling, significanteffectiveness improvement over current5-Inch rounds
l KE-ET AdvantagesØBetter lethality against given target setØBetter IM propertiesØPotential for upgrade
l Compatible with High Energy PropellingCharges
Shotgun ProjectileConclusions
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l Upgraded payloadØ Different pellet sizes and materialsØ Flechettes
l Upgraded payload capacityØ Aluminum base plugØ Composite materials
l Increased muzzle velocityØ Higher energy propelling charges
l Forward expulsion systemØ Similar to Army Beehive Round
Shotgun ProjectileConclusions - Potential Upgrades