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FUZE, POINT INITATING, BASE DETONATING: M509A1/A2 |
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Filler and Weight | ||
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| NA, 0 | |||
| Body and Overall Weight | |||
| NA, 0.31 lb | |||
| Color | |||
| NA | |||
| Type of Round, DODIC | |||
| PIBD, NA |
| Description: |
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| The fuze is essentially an aluminum housing containing a spring-loaded rotor and an electrically-fired Detonator M48. The rotor is the arming mechanism and huses the detonator. In the unarmed position, the rotor is restrained by three metal leaves, so arranged as to be displaced sequentially by setback. The power source is a polarized piezoelectric ceramic disk source is a polarized piezoelectric ceramic disk (not shown) in the nose of the projectile connected by a wire lead to the fuze. When the rotor is in the armed position, the detonator is aligned with a booster lead charge and booster charge in the nose end of the fuze. |
| Use: |
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| Point initiating, base detonating type Fuze M509A1 is used with fin-stabilize HEAT projectiles in calibers from 76mm to 120mm. |
| Functioning: |
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| When the weapon is fired, setback force acts sequentially on the leaf arming assembly. When the third leaf has been displaced to the rear, the rotor is released and can rotate, powered by a preloaded spring. Electrical contact between the housing and the rotor is made by a contact spring and a wiper contact when the rotor has moved the detonator into the armed position. When impact is made on the target, deformation of the piezoelectric element (ceramic dick) in the nose generates an electric impulse to fire the detonator. The detonator initiates the explosive train through the lead charge and booster charge to the projectile. |
| Munition Components: |
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| Data Source: |
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| TM 43-0001-28 |
| Munitions Tech Data Sheet: |
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