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| U.S. EXPLOSIVE ORDNANCE |
| PART 1 - PROJECTILES, PROPELLANT, AND PROECTILE FUZES |
| Chapter 3 - PROJECTILE FUZES |
| Section 6 - BASE FUZES FOR PROJECTILES |
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Base Detonating Fuze M66A1 |
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Projectiles used in |
3"/50 A.P. |
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Over-all length, inches |
3.45 |
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Threaded length, inch |
0.5 |
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Threads |
5 L.H. |
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Total weight, pound |
1.0 |
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Material |
Body - steel Striker - brass |
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Delay, second |
0.016 |
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Description: This fuze is assembled in two parts, and, when assembled in the projec-tile, extends from the base of the projectile in the form of a boat-tail. Contained within the body itself is a heavy brass plunger, which acts as a striker; and fitting under the striker is a soft brass washer, which acts as a shear washer. Beneath the striker, and contained in a separate unit which threads into the body, is a container for the delay element, detonator, and booster. The cavity in the head of the fuze houses the built-in tracer element. |
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Operation: There are no arming principles in this fuze; and on impact the inertia act-ion of the heavy striker collaps the brass washer, allowing the striker to initiate the pri-mer, which sets off the detonator and booster after a short delay period. |
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Remarks: This is an Army fuze which has been adopted by the Navy. No Navy Mark has been assigned to this fuze, and it is referred to by its "M" designation. |
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Figure 109. Base Detonating Fuze M66A1 |
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