Lanyard Pull Initiator

Energetic Pyro Chain

Product Description

Used to start a pyrotechnic chain of events, a Lanyard Pull Initiator (LPI) incorporates a designated time delay period, once reached attached Explosive Transfer Lines (ETLs) or similar devices are initiated. Pull of the attached lanyard provides mechanical energy to initiate dual percussion primers which start a pyrotechnic chain of events.

Lanyard Pull Initiator
Applications Specifications Interface


We have designed and manufactured 100’s of different LPIs. Qualified and used in various military, commercial and aerospace platforms including aircraft (military and commercial) and multiple missile platforms.

Lanyard Pull Initiator Functions

Ordnance Time Delay & Booster Charge:  Our LPI’s are supplied with an internal ordnance time delay. Delay time can be tailored to platform specified delay from lanyard pull to detonating output (to allow motor stage separation distance).  If desired, the LPI can be modified for near instantaneous output.  The internal booster charge allows for direct detonation transfer to standard Explosive Transfer Line (ETL) end tips. We offer both single and multiple explosive output Lanyard Pull Initiators and our LPIs require no electrical connections.


  • No-Fire Pull Force
    50 lbs minimum (w/o safing pin)
  • All-Fire Pull Force
    200 lbs maximum (w/o safing pin)
  • All-Fire Pull Distance
    0.3 inch minimum
  • Delay Time
    Tailorable to program (including instantaneous output)
  • Shock
    1400g @ 10,000Hz
  • Random Vibration
    33.5 Grms
  • Temperature Range
    -65°F to +160°F
  • Qualification
    RCC319-07 for Flight Termination Systems
    EWR127-1 for Flight Termination Systems
  • Construction
    Aluminum Body
    Steel Sear Release Piston Assembly
    Laser Welded Time Delay Cartridge & Booster Charge
    Hermetically Sealed Explosives
  • Weight
    Multiple Output ~ 315g
    Single Output ~ 212g
  • Dimensions
    Diameter: 1.00 inch
    Clamp Location Diamer: 0.875 inch
    Overall Length Multiple Output 8.5 inch
    Overall Length Single Output: 6.5 inch
    Body Length Multiple Output 7.1 inch
    Body Length Single Output: 4.7 inch




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