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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 [email protected]
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