25mm Gun Systems for theF-35 Joint Strike Fighter (JSF)25mm Gun Systems for theF-35 Joint Strike Fighter (JSF)

Presented by:Dave MaherProject Engineer – Joint Strike Fighter Gun SystemGeneral Dynamics Armament & Technical ProductsBurlington, Vermont USA802-657-7113 dmaher@gdatp.com

241st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 200641st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 2006

Presentation OutlinePresentation Outline

Technical ApproachInternal Gun System (CTOL)Missionized Gun System (CV & STOVL)

Achievements since April, 2005Preliminary Test ResultsPath Forward

341st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 200641st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 2006

Lockheed Martin F-35 VariantsLockheed Martin F-35 Variants

441st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 200641st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 2006

CTOL Gun SystemCTOL Gun System

AHS

Gun

Power Transmission (4000 psi hydraulic)

541st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 200641st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 2006

STOVL/CV Gun SystemSTOVL/CV Gun System

Fwd bulkhead captive fasteners & pin

Electrical & hydraulic connections

Aft bulkhead captive fasteners & pin

Bulb seal

Engine Nacelle vent inlet

Drainage collection from A/C

Weapon Bay Door stops

GSCU

641st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 200641st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 2006

Achievements since April, 2005Achievements since April, 2005

Completed Missionized Gun System and 4-Barrel Gun CDR July, 2005Completed Gun System Control Unit Qualification Testing – December, 2005Completed Assembly of the first GAU-22/A –January, 2006Began Fire Testing – February, 2006

741st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 200641st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 2006

Missionized Gun System and 4- Barrel Gun CDRMissionized Gun System and 4- Barrel Gun CDR

CDR Conducted July 12-13, 2005Predicted system weight below requirements

CTOL 406 lb vs 416 lb requirementSTOVL/CV 980lb vs 993 lb requirement

Technical Risks identifiedPower ConsumptionDispersionSTOVL/CV Elliptically Geared Transfer Unit

24 Action Items assignedAll closed by August 29, 2005

841st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 200641st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 2006

Four Barrel Gun Test StatusFour Barrel Gun Test Status

Over 2000 rounds fired to dateNo major problems encounteredPower consumption correlated well with predictionsGun reaction loads were somewhat lower than predictedDispersion is being evaluated

941st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 200641st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 2006

0.00

5.00

10.00

15.00

20.00

25.00

0 500 1000 1500 2000 2500 3000 3500

SPM

HP

Power PredictionPower Prediction

Predicted Range

Test Data

1041st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 200641st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 2006

Vertical Recoil Load at 2700 SPMVertical Recoil Load at 2700 SPM

Dynamic Analysis

Test Data

2500#

2500#

1141st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 200641st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 2006

DispersionDispersion

5-Barrel Target 4-Barrel Target at 2040 SPM

1241st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 200641st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 2006

JSF Gun System Master ScheduleJSF Gun System Master ScheduleTask Name

CTOLDetailed DesignFabrication and Assembly5k Round Gun Only Test10 K Round System Engineering Test30K Round System Qual. TestEnvironmental TestDelivery

STOVLDetailed DesignFabrication and Assembly5k Round Gun Only TestGun Pod SDD#1 Delivery10 K Round System Engineering Test30K Round System Qual. TestEnvironmental TestDelivery

Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q42005 2006 2007

1341st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 200641st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 2006

Path Forward Prior to the 2007 Guns & Ammo Symposium Path Forward Prior to the 2007 Guns & Ammo Symposium

Complete CTOL 10,000 Round Engineering TestCTOL 30,000 Round Qualification TestCTOL Environmental TestSTOVL/CV 5,000 Round Gun TestSTOVL/CV 10,000 Round Engineering Test

Begin STOVL/CV 30,000 Round Qualification Test

1441st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 200641st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 2006

JSF CTOL Gun System Fire TestJSF CTOL Gun System Fire Test

1541st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 200641st Annual NDIA Gun and Missile Systems ConferenceSacramento, California March 2006