What type of combat aircraft is designed to withstand damage rather than avoiding taking damage in the first place? The answer is the A-10 Thunderbolt II. The jet does not have a conventional design compared to sleek fighter jets capable of performing supersonic speeds. Instead, the jet features straight wings, thick body armor, and large frontal cannons. The jet does not have sophisticated avionics compared to its contemporaries, but it focuses on providing precise attacks on targets on the ground from low altitudes.
The A-10 Thunderbolt II has been designed based on its main armament: the GAU-8/A Avenger 30 mm cannon. This massive, seven barrel rotary cannon takes up considerable room inside the jet’s fuselage. The entire cannon assembly is one of the jet’s heaviest components. The cannon also causes a lot of recoil, which means the jet needs to be designed carefully to compensate for this aspect. To ensure the jet’s nose tracks the trajectory of the shots fired from the cannon, the active barrel is kept in line with the aircraft’s centerline, while the cannon is mounted slightly off to the left.
In essence, the A-10 Thunderbolt II has been designed around the cannon. In addition to the cannon, the jet has a relatively wide wing with a span of over 57 feet. As a result, the jet can perform slow maneuvers and remain in a stationary position for prolonged periods. The two turbofan engines are installed high on the aft fuselage, which helps reduce the risk of ingesting debris on the front airstrips.
This is the aircraft’s unique feature, since the jet is primarily used from austere locations. Additionally, the design allows the jet to remain overhead longer than other aircraft. Finally, the engines provide additional redundancy in case of damage to the plane’s structural integrity. While modern jets are built to operate fast and evade enemy attacks, the A-10 Thunderbolt II is designed to deliver firepower to the target, even if it requires sustained exposure to enemy ground fire.
The most distinguishing feature of the jet is the cockpit armor. The pilot of the A-10 Thunderbolt II sits in a titanium cage that provides protection against enemy fire. The cockpit armor is often referred to as the “bathtub” and weighs 1,200 pounds. According to the reference material from the aircraft’s survivability program, the aircraft is “as little as 1/10 as vulnerable as other operationally equivalent airplane types, depending on the threat encountered.” The armor can withstand severe ground fire, including 23 mm armor piercing shells.
In addition to the armor, the aircraft includes redundant hydraulics. If this system fails, the crew can revert to manual controls. In essence, the aircraft was designed to protect the pilot’s life and allow the aircraft to return home after taking damage from enemy ground fire. Therefore, the aircraft includes various features that increase its survivability and resistance to enemy attacks.
For example, the jet includes a hydraulic control system, which allows the pilot to control the aircraft manually when the hydraulic lines are damaged. The gun’s gasses can interfere with the engines’ performance; therefore, the engineers had to develop an ingenious solution by connecting the engine igniters to the gun’s trigger logic. Therefore, the A-10 Thunderbolt II demonstrates remarkable engineering solutions aimed at ensuring the aircraft is as controllable and reliable as possible.
At the same time, the jet has several limitations that make it unsuitable for some missions. For instance, the jet cannot perform supersonic flights and penetrate highly contested airspace due to lack of stealth technology. Overall, the jet has been built based on specific requirements that define its mission and design constraints.