Explosive Train Delay

Detonators are used to detonate high explosives. Stab detonators are initiated by sharp firing pins and are used in explosive trains of different types of fuses. Flash detonators are initiated by flames produced by safety fuses, primers, or delay elements. A special type of flash detonator ignited by the flame of a safety fuse is called a blasting cap. Detonators are primarily composed of three types of explosives including sinoxid mixtures, lead azide-based mixtures, and mercury fulminate-based mixtures. 

Relay. A component of a high-explosive train that provides the required energy to reliably initiate the next element in the train. Specifically applied to small charges that are initiated by a delay element and, in turn cause the functioning of a detonator (Ref 40a, p 120)(See slso in this Volume, Section 4, Part F (Compare with Lead)... 

Some bursting explosive trains have the primer and detonator combined into one component. Such a device is known as primer-detonator. If a definite time delay in the... 

Accdg to definition given in Ref 23, p 3-22 (slightly reworded) It is an initiating explosive - train component fired by an electrical impulse supplied by the energy either stored within the fuze before release of the missile, or generated within the fuze system just prior to or at impact of the fuze. An electric primer serves to initiate the next component of the train which can be either a detonator or delay element... 

Delay Charges (p D50-L), Delay Element (p D52-L) and Delay Explosive Train (p D53-R)... 

Delays may be incorporated into an explosive train in the form of a unit called delay element or delay element assembly. 

Nose Fuze AN-M103A1, shown in Fig 4-1, is cylindrical in shape, ca 2-inches in diameter and 7.23-in long (including the vane assembly). The fuze contains two explosive trains one for delay action, and another for instantaneous action. The "delay action train" consists of a primer, a delay element,... 

The fuze body assembly consists of metallic body which contains index lock pin, stop screw, index stop, striker assembly, rotor release assembly, delay lock pin, and rotor assembly. The explosive train consists of delay element M9, relay XM9 (2.31 grains of LA), detonator M35 (in rotor assembly) and a booster cup assembly. 

Ger 9-10 (Antiwithdrawal fuzes) Ger 20 (Bomb high-explosive train) Ger 33 (Delay compns) Ger 33-34 (Delay elements) Ger 34-35 (Detonators blasting caps) Ger 38 39 (Dust fuze) Ger 40-41 (Electric fuzes) Ger 41-2 (Electric igniters and primers) Ger 42 (Electric matchhead) Ger 44 (Eschbach igniter) Ger 53-54 (Fuseheads and their manuf) Ger 54-56 (Bomb fuzes) ... 

China Lake, Calif (1952), pp 2-23 to 2-32 (Characteristics of Explosive Train Materials) 3-1 to 3-53 (Characteristics of Primers) 4-1 to 4-22 (Characteristics of Detonators) 5-1 to 5-61 (Characteristics of Delays and Delay Elements) 6-1 to 6-11 (Characteristics of Leads) 7-1 to 7-25 (Characteristics of Boosters) 8-1 to 8-37 (Interaction of Explosive Train Materials) ... 

Type 97 Land Bomb Gaine A and Type 99 Ordinary Bomb Gaine A length 4V4 inches, depth 1-3/8 inches. Explosive Train Primer compn in upper plug BkPdr delay (0.03 sec) over flash pdr relay in middle plug Lead Azide detonator over Tetryl in lower plug and PA Booster (p 192 Fig 140)... 

Delay. A mechanical, electronic, or explosive train component which introduces a controlled time delay in some phase of the arming or functioning of a blasting cap or fuze Ref Glossary of Ord (1959h 91-L... 

Delay, Explosive Train. An expl train incorporating some delay. The train consists of combustible and expl elements arranged in the order of decreasing sensitivity inside a fuze, projectile, bomb, gun chamber or the like. The function of the expl train is to accomplish the controlled augmentation of a small impulse into one of suitable energy to cause the main chge of ammo to function. 

An explosive train component normally consisting of a primer, a delay column, and a relay detonator or transfer charge assembled in that order in a single housing to provide a controlled time interval. 

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