Shielded Mild Detonating Cord (SMDC) assemblies are explosive transfer lines, consisting of a metal sheathed explosive core, covered with an extrusion, all contained within a thin wall stainless steel tube. The Mild Detonating Cord (MDC) most commonly used in SMDC is a high temperature explosive which allows the MDC to withstand temperatures in excess of +425oF for short periods of time without any detrimental effect on the detonation characteristics.
SMDC provides reliable detonation signal propagation from one point to another while containing the detonation by-products. The SMDC lines can be arranged in various systems with the use of manifolds and other energetic components (one ways, time delays, and / or gates) to provide a self-contained energetic transmission system that can accomplish Shielded Mild Det Cord Slicedspecific mission applications such as fracturing/severance, egress of aircrew, structural cutting, rocket stage separation, destruct sequences to terminate flight and operation / initiation of energetic devices. Containment of the detonation products allows for the system to be used in close proximity to personnel and to systems that are sensitive to contamination such as optics.
PacSci EMC SMDC designs are qualified and used extensively on multiple military aircraft platforms including: F-18, F-18A, F-15, F-14, AH-1, B-1, and B-1B. In addition PacSci SMDC designs are used for stage separation on Delta IV launch vehicle and on missile platforms.
PERFORMANCE CHARACTERICS & LEVELS
≤ 10-5 cc/sec (air)
100% of water or frost
Operate in complete vacuum or under water to the tubing crush strength
-80°F to +200°F
-65°F to +350°F, will withstand 425°F for periods of 5 minutes
80 to 2000 cps +/- 20G
3 shocks of 40G in any direction
40G in any direction
6 foot drop – operational
40 foot drop – safe to handle
Plate Dent Test
0.010 inch minimum dent depth in steel plate
0.040 inch minimum dent depth in aluminum plate
No. 6 Blasting Cap or various qualified devices available through PacSci EMC (Arm Fire Initiators, Lanyard Pull Initiators, Electrical Detonators, EFIs, Safe Arm Devices)
0.02 inch to 0.10 inch, tip to tip
ENVELOPE / INTERFACE DIMENSIONS
Mild Detonating Cord configuration with SMDC Port 3/8-24 to 1/2-20.
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