Todays edition of Warbird porn looks at what is probably the ugliest aircraft to ever claw its way into the air, the A-10 Thunderbolt II, of as it is better known, The Warthog!
The Warthog is a slow, but very maneuverable ground attack aircraft that is literally built around the most powerful gun that has ever been used on an airplane, the GAU-8 Avenger, a 30 MM cannon that fires 3,900 rounds per minute.
In the late 1960’s, the Air Force began looking to replace it’s existing ground attack aircraft, the propeller driven A-1 Skyrader and the A-7 Corsair II. The winner of this competition was the A-10, named Thunderbolt II after the WWII fighter, P-47.
The A-10 is an extremely heavily armored and durable. the pilot is protected from fire by a 900 lb. titanium “bathtub” that is able to absorb 20MM cannon rounds, and the airframe its self can withstand 23MM high explosive rounds. Add a redundant hydraulics system AND a mechanical back-up system, the A-10 is actually designed to fly with one engine, one tail, one elevator and half a wing torn off!
The design of this aircraft is aesthetically ugly, but it is also a brilliant design. With the large straight wings and down turned wingtips, the A-10 is able to work from shorter and rough fields. These wings also have 8 under-wing hard points that can carry a variety of bombs, missiles and electronic sensors. Another odd feature of the A-10 is the placement of the large engines, but this is also part of the planned brilliance. The engines are shielded from each other by the body, so if one engine is hit, the other engine will probably survive, and since the plain can fly on one engine, the pilot can make it home. Also, with the engines being mounted above the horizontal stabilizer and between the twin vertical tail plains, the heat signature is greatly reduced, protecting them from heat seeking missiles.
Because of the wide straight wings and low speed maneuverability, the A-10 is able to loiter over a battlefield. The normal cruise speed is only 300 knots, and a maximum of 450 knots. The A-10 is able to hang over the area waiting to hit its favorite targets, tanks! Although they are deadly against any ground target with it’s bombs and missiles, the primary weapon of the Warthog is the tank busting GAU-30 Avenger Cannon.
The GAU-8 Avenger, 30 MM Cannon
The GAU-8 is a massive cannon, it is a Gatling gun style with seven rotating barrels. The Avenger is just under 20 feet long and when fully loaded, weighs in at just over 4,000 lbs. The gun is mounted slightly off center, this allows for the barrel that fires is along the center axis of the aircraft. Each round fired generates a massive 10,000 lbs. of recoil, and if the barrel is not on the center line of the aircraft, it would actually turn the craft off target, but as it is, the aircraft does experience a speed loss when the gun is fired. This gun is accurate at up to three and a half miles.
The 30 MM cannon shells fired by the GAU-8 are almost a foot long and caries up to 1,350 rounds with a normal 4:1 mixture of 15 oz. Armor-Piercing Incendiary and 13 oz. High Explosive Incendiary rounds.
That 15 oz. PGU-14/B Armor-Piercing Incendiary round has created a lot of controversy, it has a depleted uranium kinetic energy penetrator. This is basically a high density bullet encased in another bullet. Each of these rounds contains about two thirds of a pound of depleted uranium (DU) coated in aluminum, and when the round hits the armor of a target, the DU core, being much more dense than the armor is able to penetrate and once inside of the tank, the heat generated causes a fire that will either kill the occupants or detonate ammunition or fuel causing the vehicle to explode. Even a single round it capable of destroying any main battle tank used today.
Let’s take a look at the A-10 Warthog!

Cutaway view of the PGU-14B 30Mm round fired by the A-10. You can see the depleted uranium penetrator embedded in the round.

You can see how massive the GAU-8 cannon is.

A look at the under wing hard points. The A-10 has 8 under wing and three under fuselage pylons that can carry 16,000 lbs of bombs, missiles or electronic equipment.

An A-10 Warthog doing what it does best, killing tanks!

A great look at the nose of a Warthog. You can see how both the gun and front landing gear are both off center to allow the firing barrel to be aligned with the centerline of the aircraft to prevent the 10,000 lbs. of recoil to turn the nose of the plane.
Watch the A-10 in action
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