terminal learning objective action: introduction to modernized demolition initiators

915 Terminal Learning Objective

Action: Introduction to Modernized Demolition Initiators

915

• Developed in the late 40s

• Used in Civilian Market

• Introduced to the Army in 1996

• Supplements and Partially Replaces the M6, M7 and Detonating Cord.

HISTORY

915 CONSIDERATIONSCONSIDERATIONS

� MDI DOES NOT CHANGE CHARGE EMPLACEMENT OR SETUP

� MDI IS STRICTLY AN IGNITION SYSTEM CHANGE.

915 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

915 COMPONENTSCOMPONENTS

8

M9 HolderM9 Holder

M11-CapM11-Cap

M12/M13-CapM12/M13-Cap

M15-CapM15-Cap

M14 Time FuseM14 Time Fuse

M81-FIM81-FI

915 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

915 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

915 M9 ISSUESM9 ISSUES

� Secures only high strength caps (M11 & M14)

� NOT REUSBLE

� Unit must request enough to support all training and live fire missions

915 M11 BLASTING CAPM11 BLASTING CAP

� A branch line to a primary charge

� To ignite shock tube or detonating cord

� “High Strength Cap”

915 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


• Crate Total= 60 coils

� 2 FLAGS2 FLAGS

� 1 YELLOW (two meters from cap)

� 1 RED (one meter from cap)

915 M11 ISSUESM11 ISSUES

� Do Not Secure Det Cord and Shock Tube in Do Not Secure Det Cord and Shock Tube in the Same Holder the Same Holder

� Do Not Hold Shock Tube When FiringDo Not Hold Shock Tube When Firing

� Use J- Hook to Secure to Det CordUse J- Hook to Secure to Det Cord

� Plug and Sealed End Plug and Sealed End

915

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”

915 M12 PACKAGINGM12 PACKAGING

• 500 FT. per spool

• 2 Ea spools per foil bag

• 4 bags per crate

• Crate total- 8 spools/ 4000 Ft.

915 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”


• 1000 Ft spool

• 1 spool per foil bag

• 4 bags per crate

• Crate Total= 4 spools/ 4000 Ft

915

• “High Strength Cap”

• 5 minute delay

• Length may be adjusted

• Detonates Explosives, Det Cord or Shock Tube

M14 TIME DELAYM14 TIME DELAY


• Approx. 7 ½ ft. long

• 6 coils per fiber board box


• Crate Total= 60 Coils

915 M15 CAP, DELAYM15 CAP, DELAY

“ “ Currently a specialized use item only”Currently a specialized use item only”

915 M15 USESM15 USES

•Provide a Delay in the System for Staged Demolitions

• Is usually used for Quarrying Operations


• 70 Ft Individual Coils

• 6 Coils Per Fiber Board Box

• 10 Boxes Per Crate

• Crate Total- 60 Coils/ 4200 Ft

915 M81 IGNITERM81 IGNITER

• To Ignite Time Blasting Fuse (M14)

• Ignite Shock Tube

• M81 has a stronger cap

than M60, heavier case,

and 2 plugs


• 5 Per Fiber Board box

• 60 Boxes Per Crate

• Crate Total - 300 Igniters

915 SPLICING MATERIALSPLICING MATERIAL

� USES:

• To repair a Damaged Section of Shock Tube

• To increase standoff

� PACKING:

•5 Ea Per Plastic Bag

• 1 Bag Per Spool of M12 or M13

915

ACTION: PRIME EXPLOSIVES USING MODERNIZED DEMOLITION INITIATORS (MDI) 051-193-1103*CONDITIONS: You are given quarter-pound blocks of TNT, a priming adapter, string, a sandbag, M2 crimpers, and a section of Mll branch line. Some iterations should be performed in MOPP 4.STANDARDS: You will prime the TNT with MDI-with and without the priming adapter so that the blasting cap remains in the cap well and is not damaged or handled in a way that could cause detonation of the explosive while priming.

* Reference TC 5-150 Engineer Qualification Tables

Enabling Learning Objective 1

915

ACTION: CONSTRUCT A NONELECTRIC INITIATING ASSEMBLY WITH MODERNIZED DEMOLITION INITIATORS (MDI) 051-193-1055*CONDITIONS: You have been given detonating cord, an Mll branch line, an M12 transmission line, an M81 fuse igniter, an M14 time-delay fuse, an M9 holder, J-hooks, adhesive tape, a sandbag, and M2 crimpers. Some iterations should be performed in mission-oriented protective posture (MOPP) 4.STANDARDS: You will construct a nonelectric initiating assembly-using MDI correctly and in sequence. You will attach the assembly to a detonating-cord firing system so that, when initiated, it will detonate as if it were live.



915

ACTION: CONSTRUCT A DUAL-FIRING SYSTEM WITH MODERNIZED DEMOLITION INITIATORS (MDI) 051-193-1202*CONDITIONS: You are given detonating cord, an Mll branch line, an M12 transmission line, an M14 time-delay fuse, priming adapters, M9 holders, M81 fuse igniters, quarter-pound blocks of TNT, M2 crimpers, a sandbag, and adhesive tape. Some iterations should be performed in MOPP 4.STANDARDS: You will dual prime each charge using a combination of both MDI and detonating cord. You will correctly tie the charges into a combination firing system (also consisting of MDI and detonating cord) so the charges will detonate.



915 SUMMARY

• MDI Components

• Constructing a Nonelectric Initiating Assembly

• Constructing a Dual-firing System

• Priming Explosives

terminal learning objective action: introduction to modernized demolition initiators

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