A quick look at why the GAU-8/A Avenger Gun is Mounted Left of the A-10 Warthog Centerline

A-10 pilot tells how many bullets the Warthog’s GAU-8/A cannon carries into battle and for how long the Avenger can fire continuously

By Dario Leone
Oct 25 2021
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Designed specifically for the anti-tank role, the General Electric GAU-8/A Avenger is 20 ft long and delivers very powerful rounds at a high rate of fire.

The General Electric GAU-8/A Avenger is a 30 mm hydraulically driven seven-barrel Gatling-style autocannon that is typically mounted in the US Air Force’s Fairchild Republic A-10 Warthog.

Designed specifically for the anti-tank role, the Avenger is 20 ft long and delivers very powerful rounds at a high rate of fire.

How many rounds does the GAU-8/A carry into battle and for how long can it fire continuously?

Former A-10 Warthog pilot Lynn Taylor explains on Quora;

‘From Wikipedia’s excellent article on the GAU-8 Avenger:

The magazine can hold 1,174 rounds, although 1,150 is the typical load-out.

Davis Monthan A-10C Print
This print is available in multiple sizes from AircraftProfilePrints.com – CLICK HERE TO GET YOURS. A-10C Thunderbolt II 355th FW, 354th FS Bulldogs, FS/82-684. Davis-Monthan AFB, AZ – 2015

‘Also…

The Avenger’s rate of fire was originally selectable, 2,100 rounds per minute (rpm) in the low setting, or 4,200 rpm in the high setting. Later this was changed to a fixed rate of 3,900 rpm.

‘Here, I’ll even do the math for you.

‘3,900 rpm = 65 rounds per second (rps)

‘1,150 rounds / 65 rps = 17.69 seconds of gun’

Taylor continues;

‘Now, there are some other factors like barrel spin-up time in the first half second, so you can actually get a little more time out of it, depending on how many shots you take.

‘Also from that fine Wikipedia article:

Fairchild A-10 Thunderbolt II model
This model is available from AirModels – CLICK HERE TO GET YOURS.

In practice, the cannon is limited to one and two-second bursts to avoid overheating and conserve ammunition

‘We never really worried about overheating the barrels, though we did try to shepherd our bullets. It’s always better to run out of targets before you run out of ammo.

‘Still, you’re looking at anywhere from 9 to 18 gun passes before you’re dry. Not too shabby. And that’s not even counting all of the other care packages hanging from the wings.’

Taylor concludes;

‘Here is a short video of what that looks like on the receiving end, using high-explosive incendiary ammunition. Note that this is a gun run against a strafe target, not a point target. So, the bullets are spread out in a line, and the run lasts a little longer than usual to cover the target area.’

Photo credit: U.S. Air Force


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Dario Leone

Dario Leone

Dario Leone is an aviation, defense and military writer. He is the Founder and Editor of “The Aviation Geek Club” one of the world’s most read military aviation blogs. His writing has appeared in The National Interest and other news media. He has reported from Europe and flown Super Puma and Cougar helicopters with the Swiss Air Force.

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