25 mm Gun System for the F35 Joint

Presentation Outline l l l JSF Program Overview Key System Requirements Technical Approach ä

Lockheed Martin F-35 Variants STOVL CTOL Span (ft) Length (ft) Wing Area (ft 2)

Major Technical Requirements l l 25 mm GAU-12 gun firing at 4000 spm Compatible

CTOL Gun System l l l Ammunition Capacity: 182 rounds Modified GAU-12 gun Linear

Gun Modifications to GAU-12/U Loading Drive Barrels Muzzle Clamp Transfer Unit Recoil Spindles Firing/Safing

CTOL Gun System Ammunition Handling System l l Linear Linkless System in Serpentine Arrangement

STOVL Gun System l l l Ammunition Capacity: 220 rounds Common hydraulic drive, GSCU,

STOVL/CV Gun Modifications l Identical to CTOL with the following exceptions: ä New transfer

STOVL Gun System Ammunition Handling System l l l Linear Linkless System in Helical

Challenges l Short Design Cycle ä Use AV-8 designs where possible ä Rapid prototyping

JSF Gun System Master Schedule 2003 2004 2005 2006 2007 CTOL Design CDR JAN

Program Status l l l Loader QFD System Requirements Review CTOL Preliminary Design Review

Path Forward Prior to the 2005 Guns & Ammo Symposium l l l Assemble

Slides: 14

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25 mm Gun System for the F-35 Joint Strike Fighter (JSF) Presented by: Dave Maher Project Engineer – Joint Strike Fighter Gun System General Dynamics Armament & Technical Products Burlington, Vermont USA

Presentation Outline l l l JSF Program Overview Key System Requirements Technical Approach ä Internal Gun System (CTOL) ä Missionized Gun System (CV & STOVL) Status Path Forward 39 th Annual NDIA Gun & Ammunition Symposium Baltimore, Maryland April 2004 2

Lockheed Martin F-35 Variants STOVL CTOL Span (ft) Length (ft) Wing Area (ft 2) 35 50. 5 460 CV Span (ft) Length (ft) Wing Area (ft 2) 35 50. 5 460 Span (ft) Length (ft) Wing Area (ft 2) 43 50. 8 620 Gun Fairing F-16 AV-8 B F/A-18 C Wing Fold 39 th Annual NDIA Gun & Ammunition Symposium Baltimore, Maryland April 2004 3

Major Technical Requirements l l 25 mm GAU-12 gun firing at 4000 spm Compatible with the following ammunition: ä PGU-23/U Target Practice (TP) ä PGU-20/U Armor Piercing Incendiary (API) ä PGU-25/U High Explosive Incendiary (HEI) l Linkless Ammunition Handling System ä CTOL: 180 rounds, STOVL/CV: 220 rounds l l GSCU controls gun functions and operation of doors Reverse clearing gun 2 -level maintenance Common loader for both system types 39 th Annual NDIA Gun & Ammunition Symposium Baltimore, Maryland April 2004 4

CTOL Gun System l l l Ammunition Capacity: 182 rounds Modified GAU-12 gun Linear linkless AHS, clamshell carrier 4000 psi hydraulic drive AV-8 style transfer unit, turnaround unit, flex chutes and conveyors New GSCU & Loader 39 th Annual NDIA Gun & Ammunition Symposium Baltimore, Maryland April 2004 5

Gun Modifications to GAU-12/U Loading Drive Barrels Muzzle Clamp Transfer Unit Recoil Spindles Firing/Safing Cam Assembly Remote Safing Mid Barrel Clamp Rear Cover 39 th Annual NDIA Gun & Ammunition Symposium Baltimore, Maryland April 2004 6

CTOL Gun System Ammunition Handling System l l Linear Linkless System in Serpentine Arrangement Proven Clamshell Conveyor Based on F 15 E Design Elliptically Geared Handoff Unit Positive Round control for High Reliability 39 th Annual NDIA Gun & Ammunition Symposium Baltimore, Maryland April 2004 7

STOVL Gun System l l l Ammunition Capacity: 220 rounds Common hydraulic drive, GSCU, Loader Modified CTOL Gun Helical Ammunition Handling System (AHS) similar to GPU 5/A Unique transfer unit, turnaround unit 39 th Annual NDIA Gun & Ammunition Symposium Baltimore, Maryland April 2004 8

STOVL/CV Gun Modifications l Identical to CTOL with the following exceptions: ä New transfer unit (feed system differences) äRecoil adapters run aft (installation differences) äPower input (different drive location) hydraulic Power input Elliptical gears Recoil adapter 39 th Annual NDIA Gun & Ammunition Symposium Baltimore, Maryland April 2004 9

STOVL Gun System Ammunition Handling System l l l Linear Linkless System in Helical Arrangement Proven Bucket Carrier based on GPU-5/A Design Positive Round Control for High Reliability Bucket Carriers Helical tracks Round guides Support tube 39 th Annual NDIA Gun & Ammunition Symposium Baltimore, Maryland April 2004 10

Challenges l Short Design Cycle ä Use AV-8 designs where possible ä Rapid prototyping for long lead castings l Aggressive Schedule for Delivery ä Release CTOL Units 3 & 4 before Engineering test is complete l Overlap of CTOL and STOVL/CV Schedules 39 th Annual NDIA Gun & Ammunition Symposium Baltimore, Maryland April 2004 11

JSF Gun System Master Schedule 2003 2004 2005 2006 2007 CTOL Design CDR JAN 13 Fabrication and Assembly Test Delivery AUG, 2005 STOVL/CV Design CDR FEB 1 Fabrication and Assembly Test Delivery FEB, 2007 39 th Annual NDIA Gun & Ammunition Symposium Baltimore, Maryland April 2004 12

Program Status l l l Loader QFD System Requirements Review CTOL Preliminary Design Review CTOL Critical Design Review All CTOL parts placed on order STOVL/CV System Design Review 39 th Annual NDIA Gun & Ammunition Symposium Baltimore, Maryland April 2004 13

Path Forward Prior to the 2005 Guns & Ammo Symposium l l l Assemble and Debug CTOL SDD Systems 1 & 2 Complete 10, 000 Round Engineering Test on CTOL SDD System 1 Begin 30, 000 Round Qual test on SDD System 1 Begin Environmental Qual on SDD System 2 Complete STOVL/CV Critical Design Review 39 th Annual NDIA Gun & Ammunition Symposium Baltimore, Maryland April 2004 14