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

19 Pages·2005·10.33 MB·English

by  Renee Bellack

25mm Gun Systems for the
25mm Gun Systems for the
F-35 Joint Strike Fighter (JSF)
F-35 Joint Strike Fighter (JSF)
Presented by:
Douglas Parker
Lead Mechanical Engineer – Joint Strike Fighter Gun System
General Dynamics Armament & Technical Products
Burlington, Vermont USA
Presentation Outline
Presentation Outline
JSF Program Overview
(cid:122)
Key System Requirements
(cid:122)
Technical Approach
(cid:122)
(cid:202) Internal Gun System (CTOL)
(cid:202) Missionized Gun System (CV & STOVL)
Risk Reduction Testing
(cid:122)
Program Status
(cid:122)
Path Forward
(cid:122)
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Lockheed Martin F-35 Variants
Lockheed Martin F-35 Variants
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Major Program Changes
Major Program Changes
Program was replanned due to Aircraft level weight
(cid:122)
initiatives at LM Aero in 2nd quarter of 2004.
Gun system weight initiatives include:
(cid:122)
(cid:202) New 4-barrel gun (implemented)
(cid:202) Titanium barrel clamps (under development)
(cid:202) Removal of Gun System Control Unit (GSCU) regulated power
supplies (implemented)
(cid:202) CTOL aluminum access unit (implemented)
(cid:202) CTOL composite carriers (under parallel development)
GDATP entered risk reduction testing with the 5-barrel
(cid:122)
CTOL system in the 4th quarter of 2004.
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Major Technical Requirements
Major Technical Requirements
25mm 4-barrel gun firing at 3000 spm
(cid:122)
Compatible with the following ammunition:
(cid:122)
(cid:202) PGU-23/U Target Practice (TP)
(cid:202) PGU-20/U Armor Piercing Incendiary (API)
Linkless Ammunition Handling System
(cid:122)
(cid:202) CTOL: 180 rounds, STOVL/CV: 220 rounds
GSCU controls gun functions and operation of doors
(cid:122)
Reverse clearing gun
(cid:122)
2-level maintenance
(cid:122)
Common loader interface for both system types
(cid:122)
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Gun System Overviews
Gun System Overviews
CTOL STOVL/CV
(cid:122) Components (cid:122) Components
(cid:202) Gun Assembly (cid:202) Gun Assembly
(cid:202) Helical Ammunition Handling System
(cid:202) Linear Linkless Ammo Handling System
(cid:202) Power Transmission/Hydrive
(cid:202) Power Transmission/Hydrive
(cid:202) GSCU
(cid:202) GSCU
(cid:202) Gun Pod
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Gun Heritage
Gun Heritage
5-barrel derivative
GAU-12 commonality maximized
(cid:122)
Remote safing incorporated
(cid:122)
Installation requirements
(cid:122)
(cid:202) Support at muzzle
GAU-12U
(cid:202) New gun housing
AV-8 gun system
(cid:122)
25-mm, 4,000 spm system
(cid:122)
Supported at mid-barrel clamp
(cid:122)
4-barrel derivative
3,000 spm system
(cid:122)
Entered design in March of 2004
(cid:122)
Gun mechanism principles retained
(cid:122)
Basic installation geometry retained
(cid:122)
42 lb weight savings
(cid:122)
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CTOL Gun System
CTOL Gun System
AHS
Gun
Power
Transmission
(4000 psi hydraulic)
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CTOL - Gun Installation
CTOL - Gun Installation
GD425 (heavily based off GAU-12 to reduce risk)
(cid:122)
AV-8 derivative transfer unit (power through main rotor gear)
(cid:122)
Manual
Power input from Power Transmission through transfer unit
(cid:122) drive
Manual drive input at rotor gear for system loading
(cid:122)
A/C interface at muzzle clamp (mid-barrel was the
(cid:122)
interface used for all previous GAU-12 installations)
Muzzle interface
Transfer unit
Recoil adapters
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CTOL - Ammunition Handling System
CTOL - Ammunition Handling System
Linear linkless system in serpentine arrangement – 180 round capacity
(cid:122)
Proven clamshell carrier based on F-15E Design
(cid:122)
Proven gun conveyor identical to AV-8 design
(cid:122)
Elliptically geared Handoff Unit
(cid:122)
Access unit based on AV-8 system
(cid:122)
Positive round control for high reliability
(cid:122)
Power input
Access Unit
Gun conveyor
Handoff
unit
Turnaround unit
Clamshell carrier
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