SUMMARY OF THE ADVANCED KE PENETRATOR FOR THE ALACV STO
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SUMMARY OF THE ADVANCED KE PENETRATOR FOR THE ALACV STO Tim Farrand Lee Magness US Army Research Laboratory April 14, 20 - PowerPoint PPT Presentation


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SUMMARY OF THE ADVANCED KE PENETRATOR FOR THE ALACV STO Tim Farrand Lee Magness US Army Research Laboratory April 14, 2004. Supporting Cast. Tim Farrand & Lee Magness WMRD –Terminal Ballistics Robert Shnidman, John Abell SLAD - wit pack analysis/reduction

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Summary of the advanced ke penetrator for the alacv sto tim farrand lee magness us army research laboratory april 14
SUMMARY OF THE ADVANCED KE PENETRATOR FOR THE ALACV STOTim FarrandLee MagnessUS Army Research LaboratoryApril 14, 2004

39th Gun & Ammunition Symposium

April 13-16, 2004


Supporting cast
Supporting Cast

Tim Farrand & Lee Magness WMRD –Terminal Ballistics

Robert Shnidman, John Abell SLAD - wit pack analysis/reduction

Jodi Roberston, Rob Gangler, SLAD – LoF systematic analysis &

Jim Strobel (ret), experimental LoF

Aivars Ozolins (Oz)

Experimental facility WMRD – target/wit pack set-up and execution

Shops WMRD – manufacture targets, sabots, etc.

SLAD – witness packs assemble & reduction

39th Gun & Ammunition Symposium

April 13-16, 2004


Overview of alacv ke
Overview of ALACV KE

  • Initial Paper Study

    • Quantify STO requirement

    • Establish Experimental Methodology

  • Iterative Progression of Penetrator Design

    • Terminal Ballistic evaluations

    • BAD Analysis

  • Final Design

    • Monolithic

    • ENLE

39th Gun & Ammunition Symposium

April 13-16, 2004


Sto objectives exit criteria advanced ke
STO Objectives - Exit CriteriaAdvanced KE

Novel Penetrators

  • Develop and demonstrate advanced KE penetrators using tungsten or other alternative materials

    • Exit Criteria:

      • Achieve a 30% increase in behind armor effects (BAE) over a baseline APFSDS penetrator.

      • Relate a 30% increase in the combined (BAE) to an increase in Probability of Kill (Pk) of 10% over the baseline.

39th Gun & Ammunition Symposium

April 13-16, 2004


Summary of the advanced ke penetrator for the alacv sto tim farrand lee magness us army research laboratory april 14

30% of

Difference

GOAL

10% Overall Increase

Measure: an approximate 10% increase in

Loss of Function for this system

Quantified 30% BAE Increase

MF-KILL VS CALIBER

UPPER LIMIT

A SLAD Parametric Study of lightly armored vehicle

Goal: 30% increase in BAE

Loss of Function

BASELINE

Penetrator Size

39th Gun & Ammunition Symposium

April 13-16, 2004


Summary of the advanced ke penetrator for the alacv sto tim farrand lee magness us army research laboratory april 14

Establish Experimental Methodology

Use one range target for down select of Penetrator Designs

- modified vehicle description

EXAMPLE

ONE RANGE TGT

MODIFY TGT

(Swap Ammo &Crew)

  • Final Target Model

    • One Range Target(impact location)

    • Modify Interior of Vehicle

    • Produced Similar Results to a Cardioid Average

    • Good Representative Target

39th Gun & Ammunition Symposium

April 13-16, 2004


Summary of the advanced ke penetrator for the alacv sto tim farrand lee magness us army research laboratory april 14

Data Analysis

RADIOGRAPHS

Examine Penetrator Performance

Qualify penetrator failure mechanisms

Estimate Defeat Range

Evaluate Behind Armor Effects

Penetrator and Target

WITNESS PANELS

39th Gun & Ammunition Symposium

April 13-16, 2004


Summary of the advanced ke penetrator for the alacv sto tim farrand lee magness us army research laboratory april 14

Design Iterations

Design Iterations # Shots

1 scaled design 11

2 alternate designs – ENLE 35

2a supplement w/ mission evaluations

(Magness) 30

3 ENLE designs 26

4 Material & Geometry mods 35

5 ENLE mods 10

6 ENLE mods (fins – dia) 15

7 Final design w/ baseline 71

39th Gun & Ammunition Symposium

April 13-16, 2004


Behind armor debris phase 1 2
Behind Armor Debris (Phase 1 & 2)

Green WHA Baseline

Red DU

Black Phase 1

Blue Phase 2

Medium Overmatches

ENLE greater Behind Armor Effects

39th Gun & Ammunition Symposium

April 13-16, 2004


Loss of function for range target phase 1 2
Loss of Function for Range Target(Phase 1 & 2)

SURVIVABILITY/LETHALITY ANALYSIS DIRECTORATE

Increase Behind Armor Effects

At Closer Ranges

UPPER LIMIT

A

D

B

G

E

C

F

H

BASELINE

Loose Defeat Range Slightly

39th Gun & Ammunition Symposium

April 13-16, 2004


Summary of the advanced ke penetrator for the alacv sto tim farrand lee magness us army research laboratory april 14

Behind Armor Debris (Phase 3)

Medium Overmatches

ENLE greater Behind Armor Effects

39th Gun & Ammunition Symposium

April 13-16, 2004


Modeling analysis final design
Modeling / AnalysisFinal Design

  • Modify Perforation models for specific Mono & ENLE designs

  • Develop BAD models for MONO & ENLE

  • Input Perforation and BAD models into Lethality Target Model

  • Run Lethality Target Model for:

    • All angles of attack

    • Average for frontal 60o arc & Cardioid average

39th Gun & Ammunition Symposium

April 13-16, 2004


Summary of the advanced ke penetrator for the alacv sto tim farrand lee magness us army research laboratory april 14

Behind Armor Debris

(Final Design)

ENLE shows slight improvement

at “medium” overmatches

Eroded to ENLE

Did Not

Erode to ENLE

ENLE

Depleted

Rod

250 – 800 m/s

Red – ENLE

Black – MONO

Obliquity

Targets

Simple

Complex

Shapes

Solid

Hollow

39th Gun & Ammunition Symposium

April 13-16, 2004


Implementation of increased penetrator fragments
Implementation of IncreasedPenetrator Fragments

SURVIVABILITY/LETHALITY ANALYSIS DIRECTORATE

If Residual Velocity is between 250 – 800 m/s

then Fragments are Effective

39th Gun & Ammunition Symposium

April 13-16, 2004


System engagement weighting averages
System Engagement Weighting Averages

SURVIVABILITY/LETHALITY ANALYSIS DIRECTORATE

12.5

8.4

17.25

2.75

4.2

10.05

.75

29.25

1.2

13.65

0.0

0.0

13.65

1.2

29.25

.75

10.05

4.2

2.75

17.25

8.4

12.5

FRONTAL

CARDIOID

39th Gun & Ammunition Symposium

April 13-16, 2004


Final results cardioid average
Final Results(Cardioid Average)

SURVIVABILITY/LETHALITY ANALYSIS DIRECTORATE

Increase in Behind Armor Effects

Counterbalanced by Decrease

in Defeat Range

ENLE

Performance is

best at Close Range

39th Gun & Ammunition Symposium

April 13-16, 2004


Final results frontal attack
Final Results(Frontal Attack)

SURVIVABILITY/LETHALITY ANALYSIS DIRECTORATE

Effects Exaggerated

For Tougher Target Areas

ENLE

39th Gun & Ammunition Symposium

April 13-16, 2004


Conclusions
Conclusions

  • Completed Experimental Evaluation

    • >205 shots fired – perforation & BAD

    • >175 shots BAD – examine witness packs

  • Modified Lethality Model is a very useful tool

    • Range Target

    • Modified Description

  • ALACV Advanced KE Improvement

    • Highly Dependent on Overmatch

      • Target

      • Range

  • 39th Gun & Ammunition Symposium

    April 13-16, 2004