Holy Sh*t, if only they had fitted 2 forward firing on the skids of the Scout and 1 in each door............what a formidable piece of equipment that would have been The Falklands would have been a whole different ball-game!!!
I would think the gatling is aimed al la shotgun style. And it would be tres easy to walk the almost continual line of lead onto target.
Cant remember if this has been seen on here before, its a prototype gun that claims to fire up to a million rounds a minute (yes, a million!) http://www.metalstorm.com/04_videos/large_video_advice.html
(Ive only linked the page, scroll down to 36 Barrel Prototype, its a largish D/L, 14 mb) Lots of other interesting stuff on Metal Storms site too.
We installed two Airforce 7.62 miniguns (6000-8000 rpm), on a B-model Uh-1 which I flew for awhile (VN 1966), we eventually gave them back to the AF. They held 1500 rounds per, all internal, no external feed chutes, the ammo had to be hand cranked into each minigun which took awhile, and necessitated landing. The firepower was devastating, but just didn't last long enough to be worthwhile.The sensation was somewhat similar to flying a B-model Hog and salvoing the 48 2.75 in rockets, you started firing above the target, and pulled the cyclic back into your gut. It slowed that old B-model down from about 80 knots to approx 40 kts.
If both miniguns were firing it was controllable, if one jammed the aircraft would yaw toward the gun which was still firing.