Engineering Development for the FMU-54A/B (Fuze, Inertial Bomb Tail) and FMU-70/B (Fuze, Inertial Bomb Nose).
Final rept. 2 Feb 66-31 Dec 68,
AVCO ORDNANCE DIV RICHMOND IN
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The objectives of this development program were to utilize the FMU-54B Fuze Inertial Bomb, Tail design as the basis for the design of the FMU-54AB Fuze Inertial Bomb, Tail and the FMU-70B Fuze Inertial Bomb, Nose. Both fuzes must retain all characteristics of the basic fuze and be of the same size and configuration. The FMU-54AB Fuze must have the settable delay time increased from a maximum of 3.5 to 6.0 seconds to provide safe escape distance for the delivery aircraft and must have the added capability of an air burst upon receipt of an electrical signal from a proximity sensor. To attain these objectives, the timing mechanism was redesigned for both fuzes, the retardation sensing system for the FMU-70B Fuze was designed to sense the lack of retardation as well as retardation, components of the FMU-54AB Fuze were reduced in size and weight to make space for the electrical detonator as well as the impact detonator, and the lanyards were redesigned to accommodate the electrical signal for the proximity sensor and the electrical detonator. Author
- Ammunition and Explosives