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120mm LOS/BLOS (Line Of Sight / Beyond Line Of Sight) Advanced Technology Demonstrator: 

120mm LOS/BLOS (Line Of Sight / Beyond Line Of Sight) Advanced Technology Demonstrator Committed to Excellence Anthony Cannone Mechanical Engineer

Slide2: 

Committed to Excellence M829A3 LETHALITY COMPATIBLE WITH CURRENT 120mm AMMO WEIGHT NOT TO EXCEED 1995 kg ( 4400 LBS ) COMPATIBLE WITH AMMUNTION DATA LINK ELECTRICAL BREECH ACTUATION MAXIMUM RECOIL STROKE: 559mm ( 25 INCHES ) * MAXIMUM TRUNNION FORCE: 378,097 n @ 23,575 n-sec * ( 85,000 lb @ 5300 lb-sec) Develop new Light Weight 120mm Gun Assembly for use with the Army’s Mounted Combat System (MCS) 120mm LOS/BLOS ATD Gun Assembly IPT

Slide3: 

Committed to Excellence Overall Goals Establish Ammo Data-Link Interfaces Integrate Hardware and Electronics Fabricate & Test Breech Mechanism Assembly Develop Control Software and Electronics Fabricate & Test Gun Tube Shrouds Establish Gun interfaces Verify thermal shroud performance Develop Muzzle Brake & Blast Deflector Reduce Impulse of M829A3 round 25% Mitigate Muzzle blast Reduce Gun Assembly Weight & Imbalance Replace Steel with Titanium Use Composite Materials 120mm LOS/BLOS ATD Gun Assembly IPT

Slide4: 

120mm LOS/BLOS ATD Gun Assembly IPT Muzzle Brake & Blast Deflector Optimize Design of muzzle brake & blast deflector to achieve: 25% recoil impulse reduction Mitigate blast seen by vehicle. 3 to 6 brake / deflector designs will be test fired. Design Parameter variations: Side vent angle & Tube-Deflector Spacing Committed to Excellence

Slide5: 

Committed to Excellence 120mm LOS/BLOS ATD Gun Assembly IPT Computational Fluids Dynamics Modeling LW-120 Blast Deflector Comparison – 50% Reduction in BOP Muzzle Brake With Out Deflector Muzzle Brake With Blast Deflector #1

Slide6: 

Fabricate & Test Fire Two (2) Full size Gun Tubes Tube No. 1 - May 04 Tube No. 2 - Sept 04 Determine design criteria to mitigate Dynamic Strains/Resonance conditions Improve Composite Jacket Design Develop Fabrication Methodology Develop/Optimize “wind in tension” process Material characterization / optimization Characterize Residual stresses developed Address Fatigue / Fracture concerns Committed to Excellence Composite Wrapped Gun Tube 120mm LOS/BLOS ATD Gun Assembly IPT

Slide7: 

Committed to Excellence Gun Mount Assembly Fabricate Cradle with MCS Turret & Ammo Handling System Interfaces. Reduce weight of Recoil system using Titanium & Composites. Review Current Design & Replace Steel parts with Titanium. Design & Fabricate composite wrapped recoil cylinders . Conduct Gymnastication Test with Titanium Hardware. Weight Goals: Current: 949lbs ATD Weight: 787 lbs. 120mm LOS/BLOS ATD Gun Assembly IPT

Slide8: 

120mm LOS/BLOS ATD Gun Assembly IPT Committed to Excellence

Slide9: 

Committed to Excellence 120mm LOS/BLOS ATD Gun Assembly IPT Munition Refine D/L for 120mm Config. Refine D/L Protocol Conduct Static FEA on Stub Case Fabricate Hardware Validate FEA Develop D/L Emulator Support LOS/BLOS ATD D/L Demo Design Modifications AMMUNITION DATA LINK Armament Refine Breech Block Design Refine D/L Protocol Conduct Static FEA Breech Block Fabricate & Integrate Signal Hardware “Signal Transfer” Check-out Prior to APG Ship LOS/BLOS Design Demo Support Design Modifications DEVELOPMENT ACTIVITIES

Slide10: 

Committed to Excellence 120mm LOS/BLOS ATD Gun Assembly IPT 120MM STUB BASE AMMUNITION DATA LINK DESIGN FEATURES Bi-Directional, Two Wire Interface with Concentric Rings Transmit Data and Power Independently Manchester Encoded Data Baud Rate > 200 KHz Message Format to be Command/ Response System Transmission Time < 0.3 Seconds Compatible With German Single Pin Investigating Actuated Data Pins for Compatibility With Precision Ignition DATA LINK CONTACT BANDS

Slide11: 

Committed to Excellence 120mm LOS/BLOS ATD Gun Assembly IPT AMMUNITION DATA LINK ARMAMENT DESIGN FEATURES 120MM Multi-Lug Breech Block DATA LINK INSERT STD IGNITER COMM. - COMM. + GERMAN ADL INTERFACE

Slide12: 

Committed to Excellence 120mm LOS/BLOS ATD Gun Assembly IPT AMMUNITION DATA LINK 120MM Multi-Lug Breech Block DATA LINK INSERT STD IGNITER COMM. + COMM. - INTEROPERABLE ADL INTERFACE INSTRUMENTED CASE BASE

Slide13: 

120mm LOS/BLOS ATD Gun Assembly IPT Breech Actuation System Electric Breech Actuation Mechanism Committed to Excellence Slide Block – Downward Opening Block Travel: approximately 200mm Maximum Breech Closing Time: 0.4 sec Maximum Breech Opening Time: 0.4 sec Gas Spring Equilibrator To Balance Block Weight Motor Type: 600 Volt brush-less DC servomotor Block Position Sensors for Open / Close Electrical Make-Break Connector for Position Sensors Non-Recoiling Motor & Gearbox utilizes Mechanical Make-Break

Slide14: 

Design & Fabricate Gun Tube Shrouds, Thermal & Survivability Establish interfaces required to gun tube, cradle & Gun Shield. Determine whether survivability shroud will recoil, partially recoil, or not recoil at all. Determine if Muzzle brake will be covered, and if so how shroud will be actuated off of the brake for firing. Shrouds will undergo non-firing Lab Tests (shrouding from Solar effects) & Firing Tests. Committed to Excellence Tube Assembly 120mm LOS/BLOS ATD Gun Assembly IPT

Slide15: 

Committed to Excellence KEY MILESTONES Firing Test No. 1 – Scheduled May 2004. Muzzle Brake / Blast Deflector. Composite jacketed gun tube Breech block with data-link. Firing Test No. 2 – Scheduled July 2004. Light Weight Muzzle Brake / Blast Deflector. High strength steel gun tube. Firing Test No. 3 – Scheduled Sept. 2004. Optimized Muzzle Brake / Blast Deflector. Optimized Composite jacketed / high strength steel gun tube. Light weight Recoil Assembly. Gun Tube Shrouds Demonstrated. Ammo Data Link / Precision Ignition Demonstrated. 120mm LOS/BLOS ATD Gun Assembly IPT

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