- Heavy bomber
A heavy bomber is a
bomber aircraft of the largest size, and typically longest ranges. The term was used primarily prior to and duringWorld War II , when engine power was so scarce that designs had to be carefully tailored to their missions. The heavy bomber was generally considered to be any design that delivered 8,000 lb (4 t) of bombs or more on distant targets, withmedium bomber s having loads of 4,000 to 8,000 lb (2 to 4 t), andlight bomber s 2,000 to 4,000 lb (1 to 2 t). These distinctions were already disappearing by the middle of WWII, when the averagefighter aircraft could now carry a 2,000 lb (1 t) load and the "light" designs had now largely taken over the missions formerly filled by "mediums".Heavy bombers furthermore usually had a very heavy defensive armament. British designs commonly had three
gun turret s with a total of 8 guns. US designs, built around formation flying, had upwards of 10 machine guns and / or cannons in both turrets and flexible mounts of lesser arcs to deliver the best curtain of fire. Positions for these guns included tail turrets, side gun ports (often a simple window with a .50 caliber machine gun sticking out of it), dorsal (top-of-aircraft) turrets, and ventral (under-aircraft) gun positions which on American bombers were often ball turrets. All of these machine guns enabled heavy bombers to defend themselves reasonably well after they had passed the maximum range of their fighter escorts. British heavy bombers flew more independently by night and evasive maneuvring (the corkscrew) played as much a part in defence. The manned lower-ball gun turret on the B-17 and B-24 bombers were a marked improvement over the previous remote belly turret; the ball gun turret rotated a full 360 degrees with an effective 90-degree elevation and a range of one thousand yards.After World War II the term saw some limited use to describe bombers dedicated to the strategic role, but soon these were being referred to as
strategic bomber s, while every other design became atactical bomber . The general utility of a manned heavy bomber has been greatly degraded with the introduction of more accurateprecision-guided munition s (or "smart bombs"), but the B-52 continues to fill a role when the target requires a massive number of bombs to be dropped. Current in service heavy bombers such as theB-2A "Spirit" also participate in launching cruise missiles, such as the ALCM/CALCM.Examples
*
Avro Lancaster
*B-17 Flying Fortress
*B-29 Superfortress
*B-32 Dominator
*B-52 Stratofortress
*Dornier Do 217
*Farman F.220
*Handley Page Halifax
*Handley Page Hinaidi
*Handley Page V/1500
*Heinkel He 177
*Petlyakov Pe-8
*Piaggio P.108
*Short Stirling Notes
References
* Ambrose, Stephen E. "The Wild Blue: The Men and Boys Who Flew the B-24s over Germany." New York: Simon & Schuster, 2001. 299 pp.
* Johnsen, Frederick A. "Ball Turret: Shattering the Myths." "Air Power History" 1996 43(2): 14-21. ISSN 1044-016X
* Johnson, Robert E. "Why the Boeing B-29 Bomber, and Why the Wright R-3350 Engine?" "American Aviation Historical Society Journal" 1988 33(3): 174-189. ISSN 0002-7553
* VanderMeulen, Jacob. "Building the B-29." Smithsonian Inst. Press, 1995. 104 pp.
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