The gun on both VADS systems had a selectable 1,000 rpm fire rate for direct-fire against ground targets and 3,000 rpm for air targets: effective range was around three quarters of a mile against aircraft and 1.25 miles against ground targets.
#M61 VULCAN WARSHIP CRAFT GENERATOR#
The system uses electrical power: the M163 draws power from the host M113 APC, while the M167 can either be powered with a generator or its own integral auxiliary power unit (APU). VADS fires a specially developed high explosive incendiary tracer, self destruct (HEIT-SD) round. VADS is a manually aimed system in a power-assisted mounting: while it has an integral radar, this is only a rangefinder. The towed M167 VADS replaced the M2 Browning-based M45 Quadmount in 1967, while the M113-mounted M163 VADS replaced the 40mm Bofors L/60-based M42 Duster in 1969. The Vulcan Air Defense System was developed alongside the AIM-9 Sidewinder-based MIM-72 Chaparral as stop-gap air defense systems following the collapse of the overly ambitious MIM-46 Mauler SAM project in 1965. This led to the development of a linkless feed version, the M61A1. The first M61s used linked feed and were plagued with issues of foreign object damage (FOD) to their host aircraft from ejected belt links. In 1956 the T171 was selected and classified as the M61 Vulcan by the US Army and Air Force. Two alternatives were produced chambered in larger calibers, the T171 chambered in 20mm and the T150 chambered in 27mm. 60 cal (15mm) anti-tank gun round dating back to the interwar years, but this was felt to do insufficient damage. General Electric based their initial prototype, the T45, on a. 45-70 Government hand-cranked Gatlings rigged up to electric motors and fired for prolonged periods at 3,000 rpm. Indeed, the first proof-of-concept test rigs were a pair of antique. Richard Jordan Gatling's rotary gun concept. While European designers focused on high-caliber cannons to achieve first-shot kills, Project Vulcan was instead a resurrection of Dr. The United States Army Air Force initiated Project Vulcan in 1946, recognising that the coming jet age would require a new generation of aircraft cannons.
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