20 terms

MOD:A: MUNITIONS ARMING AND FIRING FORCES

Description of forces etc
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Terms in this set (...)

Inertia
The tendency of a body to remain at rest or in rest is known as inertia. The property of inertia is used by fuses to arm or function the internal mechanisms of the fuze
Centrifugal Forces
An out force from the center of spin. Used in fuzes to move locking balls out to release firing pins or safeties.
Creep
Forward motion of free moving fuze parts caused by the deceleration of the ordnance in flight
Creep Spring
A spring located within the fuze to limit the creep action. The spring does not completely stop the component from forward motion
Energy
The capacity to perform work.
Electrical Impulse
Fuse that utilizes electrical power to arm or fire. In bomb fuzes power can come from aircraft, wind generator or a thermal battery (most common). It is initiated upon release from the aircraft.
Fuze
A device designed to initiate the explosive train in explosive items.
Fuze Arming
The process the fuzing system goes through to bring it from a safe process to a position of readiness or initiation
Fuze Functioning
A fuze senses and interprets both natural and manmade forces to function the ordnance
Fuze Firing
During the detonation phase or fuze functioning, the action that fires the fuze
Bore Safe
A type of fuze that has an interrupter in the explosive train that keeps a projectile from exploding until it clears the weapon.
Unarmed
Condition of a fuze or firing device that permits the safe handling of the munition
Delay
Mechanical electronic, or explosive train component that causes a controlled time delay of an item, (example, the pyrotechnic delay in a hand grenade)
Springs
Designed to provide the force necessary to move fuze components or restrict the movement of fuze components for the purpose of either fuze arming or firing.
Impellers
A mechanical device that is turned by the flow of air or water as it flows through the impellers
Acceleration/Setback
The rearward movement (due to inertia) of free moving parts in a projectile or rocket fuze as it accelerates forward
Deceleration (Inertia Arming)
The forward motion of fuze components relative to the fuze body, this is caused by deceleration of the ordnance. Free moving items tend to move forward. This action is also known as creep.
Sustained Acceleration
A certain amount of acceleration is measured by a fuze for a set time. If the the acceleration is not achieved for the prescribed period of time, the fuze will not arm.
Pressure
Exertions of force on a surface from an object, water or air utilized to arm or fire a fuze.
Gas Pressure
Pressure created by a rocket motor that can be used to start and delay the arming of a fuze. Typically found in fin-stabilized rockets.