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Figure 1-25.BSU-85/B air-inflatable retarded fin (top and rear view)
GBU-12, GBU-16, AND GBU-10 (PAVEWAY II)

Aviation Ordinanceman - Aviation theories and other practices
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BSU-86/B Bomb Fin The BSU-86/B bomb fin is used with general-purpose bombs, Mk 82 Mods, or the practice bomb BDU-45/B (fig. 1-26). The fin provides a retarded (high-drag) or unretarded (low-drag) bomb delivery capability for the aircraft. The BSU-86/B fin is attached to the Mk 82 or BDU-45/B bomb by eight setscrews. A 25-degree wedge is located at the tips of each fin to impart spin. The air stream drives the fin open rapidly, when the MAU-199/B spring arming wire (SAW) is activated. The spring load under each fin blade initiates fin opening. 1-29 Figure 1-26.—BSU-86/B fin with Mk 82 bomb.







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