Precision flyer initiator

Patent · Thu Jan 01 04:00:00 EST 1998

OSTI ID:871575

Frank, Alan M ^[1]; Lee, Ronald S ^[1]

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1. Livermore, CA

A precision flyer initiator forms a substantially spherical detonation wave in a high explosive (HE) pellet. An explosive driver, such as a detonating cord, a wire bridge circuit or a small explosive, is detonated. A flyer material is sandwiched between the explosive driver and an end of a barrel that contains an inner channel. A projectile or "flyer" is sheared from the flyer material by the force of the explosive driver and projected through the inner channel. The flyer than strikes the HE pellet, which is supported above a second end of the barrel by a spacer ring. A gap or shock decoupling material delays the shock wave in the barrel from predetonating the HE pellet before the flyer. A spherical detonation wave is formed in the HE pellet. Thus, a shock wave traveling through the barrel fails to reach the HE pellet before the flyer strikes the HE pellet. The precision flyer initiator can be used in mining devices, well-drilling devices and anti-tank devices.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5756925
• OSTI ID: 871575
• Country of Publication: United States
• Language: English

Related Subjects

/102/86/
anti-tank
barrel
bridge
bridge circuit
channel
circuit
contains
cord
decoupling
delays
detonated
detonating
detonation
detonation wave
devices
driver
explosive
fails
flyer
flyer initiator
flyer material
force
formed
forms
gap
initiator
inner
inner channel
material
mining
pellet
precision
precision flyer
predetonating
projected
projectile
reach
sandwiched
sheared
shock
shock wave
spacer
spherical
strikes
substantially
substantially spherical
supported
traveling
wave
wave traveling
well-drilling
wire