25mm 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 Presented by: Dave Maher Project Engineer – Joint Strike Fighter Gun System General Dynamics Armament & Technical Products Burlington, Vermont USA

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

3 39th Annual NDIA Gun & Ammunition Symposium Baltimore, Maryland April th Annual NDIA Gun & Ammunition Symposium Baltimore, Maryland April 2004 CTOL Wing Fold Gun Fairing F-16 AV-8B F/A-18C STOVLCV Span (ft)35 Length (ft)50.5 Wing Area (ft 2 )460 Span (ft)35 Length (ft)50.5 Wing Area (ft 2 )460 Span (ft)43 Length (ft)50.8 Wing Area (ft 2 )620 Lockheed Martin F-35 Variants

4 39th Annual NDIA Gun & Ammunition Symposium Baltimore, Maryland April th Annual NDIA Gun & Ammunition Symposium Baltimore, Maryland April 2004 Major Technical Requirements l 25mm GAU-12 gun firing at 4000 spm l 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 GSCU controls gun functions and operation of doors l Reverse clearing gun l 2-level maintenance l Common loader for both system types

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

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

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

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

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

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

11 39th Annual NDIA Gun & Ammunition Symposium Baltimore, Maryland April th Annual NDIA Gun & Ammunition Symposium Baltimore, Maryland April 2004 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

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

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

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