25mm gun system for the f-35 joint strike fighter (jsf) presented by: dave maher project engineer...
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25mm Gun System for theF-35 Joint Strike Fighter (JSF)25mm Gun System for theF-35 Joint Strike Fighter (JSF)
Presented by:Dave MaherProject Engineer – Joint Strike Fighter Gun SystemGeneral Dynamics Armament & Technical ProductsBurlington, Vermont USA
Presented by:Dave MaherProject Engineer – Joint Strike Fighter Gun SystemGeneral Dynamics Armament & Technical ProductsBurlington, Vermont USA
239th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 200439th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 2004
Presentation OutlinePresentation Outline
JSF Program Overview Key System Requirements Technical Approach
Internal Gun System (CTOL)Missionized Gun System (CV & STOVL)
Status Path Forward
339th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 200439th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 2004
CTOL
Wing Fold
Gun Fairing
F-16 AV-8B F/A-18C
STOVL CV
Span (ft) 35Length (ft) 50.5Wing Area (ft2) 460
Span (ft) 35Length (ft) 50.5Wing Area (ft2) 460
Span (ft) 43Length (ft) 50.8Wing Area (ft2) 620
Lockheed Martin F-35 VariantsLockheed Martin F-35 Variants
439th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 200439th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 2004
Major Technical RequirementsMajor Technical Requirements
25mm GAU-12 gun firing at 4000 spm Compatible with the following ammunition:
PGU-23/U Target Practice (TP) PGU-20/U Armor Piercing Incendiary (API) PGU-25/U High Explosive Incendiary (HEI)
Linkless Ammunition Handling System CTOL: 180 rounds, STOVL/CV: 220 rounds
GSCU controls gun functions and operation of doors Reverse clearing gun 2-level maintenance Common loader for both system types
539th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 200439th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 2004
CTOL Gun SystemCTOL Gun System
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
639th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 200439th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 2004
Gun Modifications to GAU-12/UGun 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
739th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 200439th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 2004
CTOL Gun System Ammunition Handling SystemCTOL Gun System Ammunition Handling System
Linear Linkless System in Serpentine Arrangement
Proven Clamshell Conveyor Based on F-15E Design
Elliptically Geared Handoff Unit
Positive Round control for High Reliability
839th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 200439th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 2004
STOVL Gun SystemSTOVL Gun System
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
939th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 200439th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 2004
STOVL/CV Gun ModificationsSTOVL/CV Gun Modifications
Identical to CTOL with the following exceptions: New transfer unit (feed system differences) Recoil adapters run aft (installation differences) Power input (different hydraulic drive location)
Power input
Recoil adapter
Elliptical gears
1039th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 200439th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 2004
STOVL Gun System Ammunition Handling SystemSTOVL Gun System Ammunition Handling System
Helical tracks
Support tube
Round guides
Linear Linkless System in Helical Arrangement
Proven Bucket Carrier based on GPU-5/A Design
Positive Round Control for High Reliability
Bucket Carriers
1139th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 200439th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 2004
ChallengesChallenges
Short Design Cycle Use AV-8 designs where possible Rapid prototyping for long lead castings
Aggressive Schedule for Delivery Release CTOL Units 3 & 4 before Engineering test is
complete
Overlap of CTOL and STOVL/CV Schedules
1239th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 200439th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 2004
JSF Gun System Master ScheduleJSF Gun System Master Schedule
2003 2004 2005 2006 2007
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
1339th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 200439th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 2004
Program StatusProgram Status
Loader QFD System Requirements Review CTOL Preliminary Design Review CTOL Critical Design Review All CTOL parts placed on order STOVL/CV System Design Review
1439th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 200439th Annual NDIA Gun & Ammunition SymposiumBaltimore, Maryland April 2004
Path Forward Prior to the 2005 Guns & Ammo Symposium
Path Forward Prior to the 2005 Guns & Ammo Symposium
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