Mercedes Mullins
The Boeing B-17 Flying Fortress is a formidable aircraft that played a significant role during World War II. With its ability to carry a substantial bomb load and fly at high altitudes, it became an essential asset for air forces. The B-17's fuel system and capacity were key factors in its performance and range, enabling it to undertake long-duration missions and contribute to pivotal battles such as the Battle of the Bismarck Sea. Understanding the fuel capabilities of the B-17 provides insight into its operational endurance and strategic importance in shaping the outcome of aerial warfare during World War II.
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What You'll Learn
The B-17 Flying Fortress had additional fuel tanks for longer range
The B-17 Flying Fortress, also known as the Boeing B-17, was a bomber aircraft used by the USAAC and RAF during World War II. The B-17 was chosen for its heavy defensive armament and long-range capabilities. To increase its range, the B-17 Flying Fortress was equipped with additional fuel tanks, allowing it to meet the desired specifications of the Air Corps.
The Air Corps had specified that they required a bomber capable of carrying a "useful bomb load" at an altitude of 10,000 feet (3,000 m) for 10 hours, with a top speed of 200 mph (320 km/h). They also desired a bomber with a range of 2,000 miles (3,200 km) and a speed of 250 mph (400 km/h), although this was not a mandatory requirement. To meet these specifications, the B-17 was designed with a powerful engine and efficient fuel system.
The exact fuel capacity of the B-17 is not readily available, but it is known that the aircraft could achieve the desired range and speed specified by the Air Corps. The additional fuel tanks were added to the internal fuselage and under the wings, increasing the aircraft's overall fuel capacity and, consequently, its range. This allowed the B-17 to undertake long-duration missions and cover greater distances than its predecessor, the Martin B-10.
The effectiveness of the B-17 Flying Fortress was demonstrated in several significant battles during World War II, including the Battle of the Bismarck Sea. In this particular engagement, B-17s were responsible for damaging and sinking several Japanese transport ships. The ability to carry sufficient fuel for extended periods was crucial in providing the aircraft with the necessary endurance to reach distant targets and return safely.
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The B-17 was chosen for its heavy defensive armament
The B-17 Flying Fortress was a formidable aircraft that played a crucial role in World War II, particularly in the European and Pacific theatres. While it had excellent flight characteristics and was well-regarded by its crews, the B-17 was chosen for its heavy defensive armament, which provided a strategic advantage in combat.
The B-17's heavy defensive armament was a key factor in its selection by the United States Army Air Forces (USAAF) and other Allied air forces during the war. The aircraft was designed to carry a substantial number of machine guns, with a combination of turret-mounted and flexible-mounted weapons. The early B-17s were equipped with five .30-calibre machine guns, including one in a nose turret, one each in dorsal and ventral mounts, and two in waist blisters. This already impressive arsenal was further enhanced in later variants, with the B-17G, the definitive version, boasting an incredible thirteen ..50-calibre machine guns.
The heavy defensive armament served as a critical protective measure against attacking fighters. The B-17's ability to put up a strong defence was particularly evident when the aircraft flew in tightly stacked defensive formations, providing mutual protection to the group. This tactic was effectively employed during the first USAAF heavy bomber raid over Europe, with a successful strike against the railroad marshalling yards at Rouen-Sotteville in France.
The B-17's armament was not just about quantity but also placement and innovation. The B-17F variant introduced the manned Sperry ball turret for improved ventral defence. The B-17G, the final production version, featured the Bendix remotely operated chin turret, addressing the issue of inadequate frontal defence encountered in earlier models. The staggered waist gun windows in the B-17G also enhanced the gunners' freedom of movement, further optimising the aircraft's defensive capabilities.
The B-17's heavy defensive armament, combined with its high-altitude performance and resilience, made it a potent weapon in the hands of the Allies. Its reputation for toughness was well-earned, with stories and photographs of badly damaged B-17s safely returning to base. The B-17 played a pivotal role in campaigns such as the Battle of the Bismarck Sea, where it successfully damaged and sank Japanese transport ships. The aircraft's strategic importance and adaptability ensured its continued use even after the war, albeit in modified roles.
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The B-17 saw its greatest success in the Battle of the Bismarck Sea
The Boeing B-17 Flying Fortress was designed to carry a "useful bomb load" at an altitude of 10,000 feet (3,000 m) for 10 hours. The aircraft could also be fitted with additional internal and underwing fuel tanks to increase its range.
On March 2, 1943, six B-17s of the 64th Squadron attacked a Japanese troop convoy off New Guinea from an altitude of 10,000 feet (3,000 m). They used skip bombing to sink the Kyokusei Maru, which carried 1,200 army troops, and damage two other transports, the Teiyo Maru and Nojima.
The following day, 13 B-17s flying at 7,000 feet (2,000 m) bombed the convoy, forcing it to disperse and reducing the concentration of their anti-aircraft defenses. The B-17s attracted Mitsubishi A6M Zero fighters, which were attacked by the P-38 Lightning escorts. During this engagement, one B-17 broke up in the air, and its crew was forced to parachute to safety. Japanese fighter pilots fired on the descending aircrew and attacked them in the water after they landed.
The battle demonstrated the effectiveness of skip bombing and mast-height bombing as tactics for attacking ships. The success of the B-17s and other aircraft in the Battle of the Bismarck Sea destroyed the entire force of Japanese troops, supplies, and equipment, resulting in an estimated 15,000 enemy losses. The battle was a turning point in the war in the Pacific and showcased the importance of airpower in achieving decisive victories.
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The B-17 was used by the Navy under the designation PB-1W
Thirty-two B-17Gs were used by the Navy under this designation, with additional internal fuel tanks added for longer range and provisions for underwing fuel tanks. The first radar-equipped PB-1W was received by Navy Squadron VPB-101 in January 1946, and the PB-1Ws continued in USN service until 1955 or 1956, when they were phased out in favour of the Lockheed WV-2.
The Navy also used the designation PB-1G for B-17s, with the ""G" suffix designating search and rescue missions. The PB-1Gs were used primarily for ""Dumbo" air-sea rescue missions, iceberg patrol duties, and photo mapping. Armament was deleted from the PB-1Gs, and they were finished in the standard USCG air-sea rescue colours of the day. The Coast Guard PB-1Gs served throughout the 1950s, with the last example being withdrawn from service on 14 October 1959.
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The B-17 was first used by the RAF in World War II
The B-17, also known as the Boeing B-17 Flying Fortress, was first used by the RAF during World War II. The B-17 was a versatile aircraft that served in dozens of roles for the RAF and saw thousands of these aircraft produced.
The B-17's first combat mission was on 8 July 1941, against Wilhelmshaven, which was ultimately unsuccessful. The RAF's first operation with the B-17 was marred by issues with its guns freezing and becoming useless, and one aircraft even had to divert due to engine trouble. The second mission was equally disappointing, causing no damage to the target, and one of the bombers was so badly damaged that it could not be returned to service. Despite these initial setbacks, the B-17 would become symbolic of the United States of America's air power.
The B-17 saw early action in the Pacific War, conducting air raids against Japanese shipping and airfields. However, it was primarily employed by the USAAF in the daylight component of the Allied strategic bombing campaign over Europe, complementing the RAF Bomber Command's night bombers. The B-17 played a significant role in the Allied bombing campaign, with over 42% of the 1.5 million tons of bombs dropped on Nazi Germany and its occupied territories originating from these aircraft.
The B-17's ability to climb to higher altitudes than other aircraft proved beneficial during the final months of World War II in Europe, as German anti-aircraft defences became increasingly accurate. The B-17's large wing also made it easy to fly and manoeuvre, requiring only light control inputs to operate the ailerons.
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