Primary Instructor

SSG Ratliff

Primary Instructor

Terminal Learning Objective

Action: Introduction to Modernized Demolition Initiators

• Developed in the late 40s

• Used in Civilian Market

• Introduced to the Army in 1996

HISTORY

CONSIDERATIONSCONSIDERATIONS

� MDI DOES NOT CHANGE CHARGE EMPLACEMENT OR SETUP

� MDI IS STRICTLY AN IGNITION SYSTEM CHANGE.

CAPABILITIESCAPABILITIES� 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

COMPONENTSCOMPONENTS

8

M9 HolderM9 Holder

M11-CapM11-Cap

M12/M13-CapM12/M13-Cap

M15-CapM15-Cap

M14 Time FuseM14 Time Fuse

M81-FIM81-FI

M9 HOLDERM9 HOLDER

USES: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:PACKAGING:• 50 Ea Per box

• 10 boxes per crate

• Crate Total- 500

M9 HOLDERM9 HOLDER

� 1-2 Shock Tubes 1-2 Shock Tubes

Looped under Looped under holderholder

� 3-5 Shock Tubes3-5 Shock Tubes

Tied in a knotTied in a knot

SECURING SHOCK TUBESECURING SHOCK TUBE

M11 BLASTING CAPM11 BLASTING CAP

� A branch line to a primary charge

� To ignite shock tube or detonating cord

� “High Strength Cap”

M11 DESCRIPTIONM11 DESCRIPTION

� J HOOK CONNECTORJ HOOK CONNECTOR Used to secure det cordUsed to secure det cord

� PACKAGINGPACKAGING

• Individual coil—30ft. long

• 6 coils per fiber board box

• 10 boxes per crate

• Crate Total= 60 coils

� 2 FLAGS2 FLAGS

� 1 YELLOW (two meters from cap)

� 1 RED (one meter from cap)

M12 TRANSMISSION LINEM12 TRANSMISSION LINE

� Relay for the initiation pulse to another relay or high strength cap

� Low Strength Cap

� Command Detonation

“ “ Transmission Line Only”Transmission Line Only”

M12 PACKAGINGM12 PACKAGING

• 500 FT. per spool

• 2 Ea spools per foil bag

• 4 bags per crate

• Crate total- 8 spools/ 4000 Ft.

M13 TRANSMISSION LINEM13 TRANSMISSION LINE

� Relay for the initiation pulse to another relay or high strength cap

� Low Strength Cap

� Command Detonation

“ “ Transmission Line Only”Transmission Line Only”

M13 PACKAGINGM13 PACKAGING

• 1000 Ft spool

• 1 spool per foil bag

• 4 bags per crate

• Crate Total= 4 spools/ 4000 Ft

• “High Strength Cap”

• 5 minute delay

• Length may be adjusted

• Detonates Explosives, Det Cord or Shock Tube

M14 TIME DELAYM14 TIME DELAY

M14 PACKAGINGM14 PACKAGING

• Approx. 7 ½ ft. long

• 6 coils per fiber board box

• 10 boxes per crate

• Crate Total= 60 Coils

M15 CAP, DELAYM15 CAP, DELAY“ “ Currently a specialized use item only”Currently a specialized use item only”

M15 USESM15 USES

•Provide a Delay in the System for Staged Demolitions

• Is usually used for Quarrying Operations

M15 PACKAGINGM15 PACKAGING

• 70 Ft Individual Coils

• 6 Coils Per Fiber Board Box

• 10 Boxes Per Crate• Crate Total- 60 Coils/ 4200 Ft

M81 IGNITERM81 IGNITER

• To Ignite Time Blasting Fuse (M14)

• Ignite Shock Tube

• M81 has a stronger cap

than M60, heavier case,

and 2 plugs

M81 PACKAGINGM81 PACKAGING

• 5 Per Fiber Board box

• 60 Boxes Per Crate

• Crate Total - 300 Igniters

SUMMARY

• MDI Components

• Constructing a Nonelectric Initiating Assembly

• Constructing a Dual-firing System

• Priming Explosives