EXPLODING FOIL INITIATOR FIRE SET DESIGN

ECR PROPOSES AN EXTREMELY COMPACT, LIGHT-WEIGHT AND SAFE EFI FIRING SET. THE CIRCUIT USES THE HYDRAULIC RAM PRINCIPLE TO CHARGE A CAPACITOR (A COMPACT EXTREME HIGH ENERGY DESIGN DESCRIBED IN A SEPARATE SBIR, A88-51) IN ONE STEP BY OPEN-CIRCUITING AN INDUCTOR. THE CONCEPT DOES AWAY WITH THE DC-DC CONVERTER AND TRANSFORMER AND RETAINS A TRIPLE SAFETY ARMING AND ABORT FEATURE. THE PROPOSAL DESCRIBES THE DESIGN OF THE COMPONENTS WHICH INCLUDE A (A) 1 MN TIME CONSTANT INDUCTOR WITH 17 CM(3) VOLUME (MINUS A 6.3 CM(3) INTERIOR HOLLOW SPACE WHICH IS USED TO HOUSE ALL THE OTHER COMPONENTS EXCEPT THE BATTERY), (B) A 20 CM(3), 24 V ENERGIZING BATTERY, (C) A 0.5 CM(3) CUSTOM SLEEVE-TYPE CAPACITOR (TO BE DESCRIBED BELOW) DESIGNED TO FIT INTO -AND NOT INTERFER WITH -THE INDUCTOR, AND A MECHANICAL/FUSE OPENING SWITCH TO INTERRUP 45 AMPERES AND HOLD OFF 3 KV. THE CIRCUIT MULTIPLIES THE POWER FROM THE 24 VOLT BATTERY BY 214, WITH AN OVERALL EFFICIENCY OF 64%. THE TOTAL VOLUME EXCLUDING THE BATTERY IS THAT OF THE INDUCTOR AT 17 CM(3).