Primary Instructor

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Primary Instructor
Primary Instructor SSG Ratliff

• SSG Ratliff

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Terminal Learning Objective
Action Introduction to Modernized Demolition
Initiators
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HISTORY

• Developed in the late 40s
• Used in Civilian Market
• Introduced to the Army in 1996

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CONSIDERATIONS

• MDI DOES NOT CHANGE CHARGE
  EMPLACEMENT OR SETUP
• MDI IS STRICTLY AN IGNITION SYSTEM CHANGE.

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CAPABILITIES

• Standard military demolition missions
• Deepwater up to 30 meters
• Quarrying(with special application).
• Instant or delay initiation
• Eliminates accidental initiation from static,
  transmitters, or electrical discharge
• Hybrid (two types of firing systems)
• MDI Stand Alone
• MDI/Det Cord, Det Cord/MDI

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COMPONENTS
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M9 HOLDER

• USES
• Secure a blasting cap (small flap end)
• Secure shock tubes to the blasting cap (larger
  flap)
• Can secure up to five shock tubes for initiation

• PACKAGING
• 50 Ea Per box
• 10 boxes per crate
• Crate Total- 500

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M9 HOLDER
SECURING SHOCK TUBE

• 1-2 Shock Tubes
• Looped under holder
• 3-5 Shock Tubes
• Tied in a knot

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M11 BLASTING CAP

• A branch line to a primary charge
• To ignite shock tube or detonating cord
• High Strength Cap

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M11 DESCRIPTION

• 2 FLAGS
• 1 YELLOW (two meters from cap)
• 1 RED (one meter from cap)

• J HOOK CONNECTOR Used to secure det cord
• PACKAGING
• Individual coil30ft. long
• 6 coils per fiber board box
• 10 boxes per crate
• Crate Total 60 coils

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M12 TRANSMISSION LINE

• Relay for the initiation pulse to another relay
  or high strength cap
• Low Strength Cap
• Command Detonation

Transmission Line Only
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M12 PACKAGING

• 500 FT. per spool
• 2 Ea spools per foil bag
• 4 bags per crate
• Crate total- 8 spools/ 4000 Ft.

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M13 TRANSMISSION LINE

• Relay for the initiation pulse to another relay
  or high strength cap
• Low Strength Cap
• Command Detonation

Transmission Line Only
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M13 PACKAGING

• 1000 Ft spool
• 1 spool per foil bag
• 4 bags per crate
• Crate Total 4 spools/ 4000 Ft

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M14 TIME DELAY

• High Strength Cap
• 5 minute delay
• Length may be adjusted
• Detonates Explosives, Det Cord or Shock Tube

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M14 PACKAGING

• Approx. 7 ½ ft. long
• 6 coils per fiber board box
• 10 boxes per crate
• Crate Total 60 Coils

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M15 CAP, DELAY
Currently a specialized use item only
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M15 USES

• Provide a Delay in the System for Staged
  Demolitions
• Is usually used for Quarrying Operations

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M15 PACKAGING

• 70 Ft Individual Coils
• 6 Coils Per Fiber Board Box
• 10 Boxes Per Crate
• Crate Total- 60 Coils/ 4200 Ft

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M81 IGNITER

• To Ignite Time Blasting Fuse (M14)
• Ignite Shock Tube
• M81 has a stronger cap
• than M60, heavier case,
• and 2 plugs

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M81 PACKAGING

• 5 Per Fiber Board box
• 60 Boxes Per Crate
• Crate Total - 300 Igniters

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SUMMARY

• MDI Components
• Constructing a Nonelectric Initiating Assembly
• Constructing a Dual-firing System
• Priming Explosives