2003 NDIA Gun Systems Company 38th Annual Gun & Ammunition Symposium 24 – 27 March 2003 (cid:226) James Lamb ATK Gun Systems Co. LLC (480) 324-8658 [email protected] (cid:226) Gun Systems Company •M230 History •Features •Why a Link Fed? •Design Goals •Configurations •M230LF Features Gun Systems Company • Development begun in 1972 by HHI – Externally powered guns had high profile • 20mm and 7.62mm Gatling Guns • Linked WECOM 30mm “DAT” gun – 1975, 250K round competitive test – Competition was Gatling gun w/ linked WECOM round • MDHC won gun and YAH64 competition Gun Systems Company • 1976 DoD gave direction to HHI – Re-chamber XM230 to fire ADEN/DEFA rounds for NATO interoperability – Contractor given responsibility for development of a family of 30mm rounds • M788 (TP) • M789 (HEDP) • M799 Gun Systems Company M230 Chain Gun® Gun Systems Company Gun Systems Company 30mm x 113mm M788, TP • Target Practice • Round Length (max): 199.75mm • Case Length: 113mm • Weight: 352.8g • Muzzle Velocity (nominal): 805 m/s • Chamber Pressure (typical): 415 MPa • Penetration (typical): N/A Information courtesy of ATK, Alliant Ammunition Systems Co. Gun Systems Company 30mm x 113mm M789, HEDP • High Explosive Dual Purpose • Round Length (max): 199.75mm • Case Length: 113mm • Weight: 350.5g • Muzzle Velocity (nominal): 805 m/s • Chamber Pressure (typical): 415 MPa • Trace (typical): Available • Penetration (typical): 25mm RHA @ 50Á at 500m Information courtesy of ATK, Alliant Ammunition Systems Co. Gun Systems Company Features • Chain drive • 30mm x 113mm • 625 ± 25 shot per minute – M788, M789, ADEN, DEFA • Rotating breech bolt – Electric Primed • Linear Linkless feed Hydraulic Recoil Dampers • Electric Primed Ammo – 3000 lb peak load – 1.0 inch recoil • Externally powered • Positive timing – 115V, 400Hz, 3 Ø, 3 HP Gun Systems Company Features •Weight 131.5 lbs (59.6 kg) •Small •Length: 65.8 Inches (167.6 cm) •Width: 10.5 Inches (26.0 cm) •Height: 11.2 Inches (28.0 cm) •Frontal Area: 55.0 Inches2 (354.8 cm2) •Ease of Maintenance •Number of Component Items approx. 120 •Dry cycle for one minute •Remove and replace: Less than 10 minutes