09/30/2010. The B-52G was the major production model of the B-52 series, which first flew on October 26, 1958, and 193 were built. Many major changes were made, the most noticeable being a reduction in the size of the vertical fin, replacement of the 3,000 gal (11,356 l) auxiliary tanks with the 700 gal (2,650 l) size of the B-52B, deletion of the ailerons, and modification of the tail cone. Internal fuel capacity was increased to 46,000 gal (174,129 l) by additional tanks and replacement of the rubber tank structure with integral tanks.

Although still fitted with eight of the 13,750 lb (6,237 kg) st Pratt & Whitney J57-P-43W turbojets as used on previous version, the water injection system was revised and duration increased by installation of a single 12,000 gal (45,425 l) tank in the forward fuselage. The tail gunner was moved forward into the nose section to operate his four-gun tail turret by remote-control or through the automatic fire control system. This resulted in the revised tail cone shape and relocation of the deceleration parachute compartment.

While the B-52G was equipped as a standard bomber, it could also carry two North American AGM-28 (formerly GAM-77) Hound Dog missiles, one on a pylon under each wing between the inboard nacelles and the fuselage. The AGM-28 was actually a small supersonic jet bomber, powered with a 7,500 lb (3,402 kg) Pratt & Whitney J52 engine and equipped with its own inertial guidance system and a four-megaton nuclear warhead. It could be launched several hundred miles from the target and reach it without guidance from the crew of the B-52G.

These missiles actually made the B-52G a ten-engine bomber when their engines were used to assist take off. Fuel used during this operation was replaced in flight from the B-52 fuel system. The B-52G could also carry a pair of McDonnell ADM-20 (formerly GAM-72) Quail decoy missiles in the bomb bay. The ADM-20 was a small delta-wing drone powered with a 2,450 lb (1,111 kg) General Electric J85-GE-7 engine that flew at the same speed and altitude of the B-52 after launch and contained electronic devices that made it look like a B-52 on enemy radar scopes.