We built them in Burlington, VT... at the GE Plant. The truth is stranger than fiction... but the gist is that the plane was designed around the gun!
I say 'we' because I ran part of their advanced programs skunkworks for a few years in the early 2000's..
An interesting bit of trivia... the original concept for the GE minigun was proved out using an early military Gatling Gun... in .45/70... that engineers in the '50s strapped an electric motor on to prove the concept. It ran like a top... at thousands of rounds per minute. The original 'test' Gatling gun is still on display up at the Ethan Allen range where all the guns are tested. Motor gone... an historical relic of epic importance!
The 'hard part' of making a Gatling gun work is not the bolts and firing... it's the materials movement of the belts. Every one of those 30mm shells weighs about 3 pounds. When you start a belt moving at 3,000 a minute (plus or minus), you are moving 3,000 x 3 pounds... or 4.5 tons of belt at a go. Yes, the belts were not long enough for a full minute of firing. But you see the problem... the inertia of those shells starting and stopping in the feed... was monsterous! The bolts worked slicker than goose-turds on linoleum. The ammo feeding was an engineering masterpiece!
Cheers,
Sirhr
Interesting information on the feed system. You are correct that the airframe was built around the weapon. For those unfamiliar with the A10, notice that the nose gear is offset to accommodate the the centerline placement of the gun.