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Advanced KE Penetrator for ALACV STO - Summary

This document provides a summary of the advanced KE penetrator development for the ALACV STO. It includes information on the objectives, experimental methodology, design iterations, behind armor effects, and final results.

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Advanced KE Penetrator for ALACV STO - Summary

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  1. 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

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. Behind Armor Debris (Phase 3) Medium Overmatches ENLE greater Behind Armor Effects 39th Gun & Ammunition Symposium April 13-16, 2004

  12. 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

  13. 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

  14. 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

  15. 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

  16. 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

  17. Final Results(Frontal Attack) SURVIVABILITY/LETHALITY ANALYSIS DIRECTORATE Effects Exaggerated For Tougher Target Areas ENLE 39th Gun & Ammunition Symposium April 13-16, 2004

  18. 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

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