The lessons of war transformed military aviation. Aircraft evolved into a crucial element of warfare, and technological innovations proved decisive for the future of aviation. From heavily armoured ground-attack aircraft to fast, nimble fighters to long-range bombers, each aircraft played a role and at various times across Europe and in the Pacific theater, each aircraft made a difference. The Soviet Ilyushin Il-2 earned the moniker, Flying Tank, while Germany’s Junkers Ju 87 proved the lessons of precision dive-bombing. Legendary fighters like the P-51 Mustang, Mitsubishi A6M Zero, Messerschmitt Bf 109, and Supermarine Spitfire, on the other hand, proved the importance of speed, agility, and range to the struggle for air supremacy.

Numerous other types also proved essential to the evolution of military aviation. The Junkers Ju 88 could fulfill a variety of battlefield functions, and the Avro Lancaster and Boeing B-17 Flying Fortress emerged as primary components of the Allied strategic bombing effort. The Boeing B-29 Superfortress also pioneered new developments such as a pressurized fuselage and computer-controlled fire system all before being deployed in the atomic assault on Hiroshima and Nagasaki. These 10 aircraft represent some of the most significant engineering, combat, and operational contributions to the evolution of military aviation.

1. Ilyushin Il-2

The Il-2 was the main ground-attack aircraft of the Soviet Army during key operations on the Eastern front. Named the “Hunchback” due to its angular cockpit design, and “Flying Tank” as a result of the total amount of armour on the aircraft, the Il-2 was a single-engine, monoplane aircraft that housed a pilot and rear gunner. Joseph Stalin once claimed that this aircraft was “as necessary to the Red Army as air and bread”, and the Il-2 proved its worth during the Battle of Kursk and the destruction of German Junkers Ju 52 aircraft during the Battle of Stalingrad. In total, 36,183 Il-2s were built in 4 years from 1941-1945, making it the most-produced military aircraft design in aviation history.

The Flying Tank’s Defining Features:

• Soviet ground-attack aircraft
• Heavy armored single-engine design
• Two-person crew configuration
• 36,183 aircraft produced
• Major Eastern Front contribution

The irony being that despite its crucial role in holding back the German advance the Il-2 was extremely vulnerable to combat with enemy fighters. With its relatively poor speed and low manoeuvrability they were generally shot down by dedicated fighters like the Messerschmitt Bf 109. Nevertheless the heavily armoured features of the aircraft as well its close control of ground-attacks led to the Il-2 being an essential element of the Soviet airforce. It was mainly used by the Soviet Air Force but also by the Hungarian Air Force, the Polish Army Air Force and the Yugoslav Air Force. First flown on 2nd October 1939 the aircraft entered service in 1941.

2. Junkers Ju 87

Junkers Ju 87 (Stuka), German dive-bomber with inverted gull wings and fixed landing gear. The sirens mounted on the landing gear emitted a wailing sound as the machine dove steeply on a target and the bombardier plunged its bombs into the aim. Powered by its Jumo 211D, four-stroke, 1,184-horsepower engine, the Ju 87 could fly at speeds of over 250 miles per hour and carry a bomb load of up to 1,800 kg. It was equipped with four 7.92 mm machine guns. It participated in the battles of Poland, Norway, France, Britain, North Africa, Normandy and the Eastern Front.

Inside the Stuka’s Attack Strategy:

• Specialized German dive bomber
• Distinctive inverted gull wings
• Sirens created psychological pressure
• Precision bombing attack capability
• Up to 1,800 kilograms payload

The Stuka was very effective as close air support and anti-shipping aircraft, especially in the early years of the war. Its dive brakes (rear-mounted airbrakes) assisted the pilot in pulling out of steep dives even under extreme G-force. The plane was relatively slow and not very maneuverable, which made it a target for enemy fighters during the Battle of Britain, it required plentiful fighter cover to operate effectively, and with the loss of air superiority it was increasingly vulnerable to attack by Allied aircraft. Approximately 6,000 Ju 87s were built between 1936 and August 1944. The Ju 87 was in service until the end of the war, famous for its ability to deliver accurate close ground attack, it was one of the most well known German aircraft.

3. North American P-51D Mustang

The North American P-51D Mustang became arguably the most important American fighter-bomber during the European air campaign. With its mix of speed, maneuverability and long range capability, the Mustang was able to escort heavy bombers over Germany deep into enemy territory. As the external wing-mounted fuel tanks increased the range to about 1,650 miles it began to help resolve the issue of Allied bombers being subject to interception by German fighters on their return flight. The Mustang made its combat debut in early 1944 and during Big Week it damaged 17 percent of the Luftwaffe’s fighters while guarding Allied bombing missions.

The Mustang’s Combat Advantages:

• American long-range fighter
• External fuel tanks extended range
• Approximately 1,650-mile operational reach
• Important Big Week contribution
• Supported D-Day operations

The P-51D Mustang assisted in transforming the power of the allied bomber operation by escorting them much farther into enemy airspace. Heavy bombers suffered from a wide gap in protection if they went into enemy territory without escort, but the P-51 Mustang helped fill that gap with long-range operational capability and protection against the German interceptors, and even in the D-Day offense. Over twenty versions of the P-51 Mustang were produced, some going on to participate in other conflicts after World War II, but it contributed important support to the European conflict.

4. Mitsubishi A6M Zero

The Mitsubishi A6M Zero a lightweight, aircraft-carrier based fighter that was instrumental in the early part of the Pacific War. The zero was Jiro Horikoshi’s construction, and utilized lightweight metals including aluminum, a modified zinc-aluminum alloy known as ‘Zionite’ and plywood in its construction to make it highly maneuverable and light. The Zero packed a 1,130-horsepower engine, giving it a top speed of 350mph it was also equipped with two 7.7mm machine guns, two 20mm cannons and a pair of 132lb bombs under its wings. Due to its range and handling capabilities, the Zero held an advantage over allied planes in the opening salvo of the Pacific War.

The Zero’s Pacific War Strengths:

• Japanese carrier-based fighter
• Lightweight construction and agility
• 350-mile-per-hour top speed
• Powerful cannon armament
• Major Pearl Harbor role

The Zero was the aircraft that was used in the attack on Pearl Harbor on December 7, 1941 (the date of the operation was “Tora! Tora! Tora!”). At the time, when it was new, the Zero was the best carrier-based fighter in the world, known for its maneuverability, speed, firepower, and long range it was vulnerable, however, due to lack of armor and self-sealing fuel tanks. By the middle of 1942, Allied fighter aircraft and tactics had improved to the point that opposing pilots could now challenge the Zero effectively. By 1944, the Zero was slower than newer Allied fighters but continued in service until the end of the Pacific War, and it was used in kamikaze attacks.

5. Junkers Ju 88

The Junkers Ju 88 entered service as a fast level bomber and eventually became one of the Luftwaffe’s most flexible multi-role aircraft. With maneuverability, firepower, and its incredible speed the Ju 88 played a part in dive bombing, night fighting, reconnaisance, and anti-shipping throughout the war. It was driven through the air by a twin-cylinder aircraft engine with 1,350hp that pushed it to just shy of 300 miles per hour. It also had defensive machine guns around the aircraft and could carry over 4,400 pounds of bombs. The Ju 88 was one of the most widely used German planes for the rest of the war, especially in the Mediterranean, Eastern Front, and Atlantic theaters.

The Ju 88’s Multi-Role Capabilities:

• German twin-engine combat aircraft
• Fast level bomber design
• Night fighter and reconnaissance roles
• Anti-shipping strike operations
• Extensive wartime production

The Ju 88 was one of the Luftwaffe’s most heavily used aircraft of the war, primarily because of its ability to do a number of different roles without the need of developing a new aircraft. These were dive bomber, torpedo bomber, and reconnaissance, heavy fighter, night fighter and dive bomber. The first prototype was built and first flew on the 21 December 1936, and due to various teething troubles did not enter service until September 1939. An impressive aircraft by modern standards in terms of production numbers, being the most-produced twin engine aircraft in the war on either side, with over 15,000 aircraft being constructed, it formed the backbone of the German war effort in many theaters.

6. Messerschmitt Bf 109

The Messerschmitt Bf 109 was the German single-engined fighter aircraft that dominated the airspace war over Europe. Developed in the 1930s and modified throughout WWII, the Bf 109 was used during the earliest phases of the Blitzkrieg and was seen in aerial combat during the Battle of Britain. Powered by a twelve-cylinder, 1,455-horsepower engine, the Bf 109 could reach 400 miles per hour at nearly 40,000 feet and was an attack aircraft that was armed with machine guns, a 20-millimeter cannon and, in certain variations, extra weaponry.

The Bf 109’s Fighter Performance:

• Germany’s primary single-seat interceptor
• Approximately 400-mile-per-hour speed
• Operating altitude near 40,000 feet
• Continuous wartime design development
• More than 32,000 produced

Eventually it would become one of the Luftwaffe’s most important fighters, initially undertaking interception duties, but later versions would be used as bomber escorts, fighter-bombers, ground-attack aircraft, and reconnaissance aircraft. With its all-metal construction, enclosed cockpit, retractable undercarriage, and liquid-cooled engine, the Bf 109 was an advanced design when it first appeared. Many of the aircraft’s pilots proved to be among the most successful in German fighter history, not least of whom was Erich Hartmann, with 352 victories. Over 32,000 airframes were built, with 34,248 RAF aircraft recorded from 1936 to April 1945.

7. Supermarine Spitfire

This classic British aircraft was designed by R.J. Mitchell and was one of the most widely recognizable symbols of British perseverance in the early 1940s. The elliptical wing design that helped give it a traditional look also made it a relatively fast and nimble aircraft that proved to be effective at defending British sovereignty. The original version (called the Mark I) was powered by a 1,030-horsepower Rolls-Royce Merlin engine which helped it reach a top speed of 364 miles per hour and reach heights of about 34,500 feet. It was armed with 8 machine guns directed in front of the aircraft. Over 20,000 of these planes were manufactured during and after the war in various versions.

The Spitfire’s British Legacy:

• Distinctive elliptical wing design
• Rolls-Royce Merlin engine
• Maximum speed of 364 mph
• Eight forward-facing machine guns
• More than 20,000 produced

It proved invaluable to the United Kingdom during the Battle of Britain, as it was instrumental in repelling attack from the Luftwaffe. Although it was the Hawker Hurricane which flew the greatest number of sorties, it was the Spitfire which earned its reputation as an attacker of the German fighters, in particular the Messerschmitt Bf 109E, due to its greater maneuverability and speed. It became the aircraft most associated with the Battle of Britain, and subsequently the main RAF Fighter Command aircraft, being used throughout the war in Europe, the Mediterranean, the Pacific and Southeast Asia. It was also used in the roles of photo-reconnaissance, fighter-bomber and trainer aircraft, a continual evolution of the Spitfire saw it available in many different versions into the 1950s.

8. Avro Lancaster

The Avro Lancaster was first put into operational service with the RAAF in 1942 and went on to become its most important heavy bomber in World War II. Developed by Roy Chadwick, the Lancaster was powered by four Rolls Royce Merlin 1,280-horsepower engines. It had an overall length of 70 feet and a wingspan of 102 feet and was fitted with twin tails. Its large bomb bay could hold a variety of payloads, enabling the Lancaster to conduct long-range strategic bombing missions over Europe. It was flown by a crew of seven.

The Lancaster’s Heavy Bombing Power:

• British four-engine heavy bomber
• Entered service during 1942
• Seven-person operating crew
• Large strategic bombing payload
• Famous 1943 Dam Busters raid

One of the most famous Lancaster operations was during the Dam Busters raid in 1943, also known as Operation Chastise. Lancaster aircraft fitted with special bouncing bombs were sent to attack specific dams in Germany’s Ruhr region with the intention of neutralising water power used in industrial production. The aircraft’s long, open bomb bay meant it was also used to carry some of the largest bombs ever operated by the RAF, including 4,000lb, 8,000lb and 12,000lb bombs. 7,377 Lancaster aircraft were built and it became the main heavy bomber for the RAF and other allied air forces.

9. Boeing B-17 Flying Fortress

The Boeing B-17 Flying Fortress was a rugged American heavy bomber primarily used for daytime bombing over occupied Europe. With a length of about 75 ft and wing span of 104 ft, it had a large tail structure for stability during high altitude flying. It was powered by four 1,200 hp Wright engines with a top speed of 287 mph and range of about 3,750 miles. It was armed with 13 0.50 caliber machine guns and could carry 9,600 lbs of bombs. It was well known for taking severe battle damage and still returning home.

The Flying Fortress’s Defensive Strength:

• American four-engine heavy bomber
• Long-range daylight bombing missions
• Thirteen defensive machine guns
• Approximately 3,750-mile operational range
• More than 640,000 tons dropped

The B-17 was very important to the strategic bombing campaign mounted by the United States Army Air Forces over Europe. In complement to the British night-bombing campaign, the B-17s carried out daylight attacks against German military, industrial, and other targets. The aircraft’s toughness was one of its hallmarks, and earning reputation for surviving extensive damage from enemy flak. During World War II, the bombers dropped more than 640,000 tons of bombs on German targets. B-17 aircraft also performed missions other than bombing, including transport, anti-submarine, and search and rescue operations. Overall, 12,731 aircraft were built from 1936 to 1945.

10. Boeing B-29 Superfortress

Design & specifications of the B-29 superfortress Aircraft The B-29 superfortress was a major technological leap in the military aircraft domain. It was a very advanced aircraft when it entered service in 1944. The plane was 99 ft. In length and had 4 engines on board 4 Wright R-3550 2,200 hp. Each, with the maximum speed of 365 mph and a range of 5,830 miles. The plane could transport a large number of different types of weaponry, such as conventional bombs, maritime mines, incendiaries, and nuclear bomb. Several technologies used in the B-29 superfortress designed the back wall of the aircraft, and some of those ideas were used in modern military airplanes.

The Superfortress’s Advanced Technology:

• Advanced American strategic bomber
• Four powerful Wright engines
• Approximately 5,830-mile operational range
• Pressurized cabin technology
• Historic atomic bombing missions

The B-29 proved even more vital toward the end of the war due to the atomic bombing of Hiroshima and Nagasaki with the aircraft, including the Enola Gay, Bockscar, and The Great Artiste. This enterprise altered the nature of contemporary combat. The new pressurized cabin, twin-wheeled tricycle landing gear, and computer-assisted fire-control system which allowed remote operation of gun turrets allowed it to be the most powerful and advanced bomber in the world at the time. The B-29s, 3,970 of which were built between 1943 and 1946, went on to serve in other roles even after the war came to an end.