Flash Fuze Detonators

This type of detonator is designed to deliver a detonating impulse when acted upon by a heat impulse or a detonating impulse generated by a previous element. In the latter case it serves for boostering the detonating impulse. Heat impulses may result from the flash of a delay element in delay type fuzes or the flash from a primer in instantaneous type fuzes. When initiation results from the functioning of a previous detonator, the flash type detonator usually serves in the capacity of a relay where the gap over which the detonation must be transmitted is too 

LEAO AZIDE ( MIL-L-3055) . 240 GRAM PRESSEO IN 2 EQUAL INCREMENTS OF. 124 GRAM EACH AT 

LEAO AZIDE (MIL-L-30S5) . 24 GRAM PRESSEO AT 20,000 PSI IN 2 INCREMENTS i LOAD ON RAM, 300 LBS 

The construction of flash type detonators is similar to other detonators. Each flash type detonator consists of a metal capsule contg a chge of expls. The capsule, which is usually of A1 (on account of presence of LA as an expl ingredient in US Army and Navy flash detonators) may be closed with paper or thin A1 disk, as indicated in Fig 

The Detonator Mk33 Mod O (See Fig) contains only one ingredient (LA), although it is in two, differently compressed increments. 

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The meaning of "coined" end is explained under Flash Fuze Detonator... 

Fuze detonators may be subdivided into instantaneous and delay. (Delay types are described in Section 4, Part F). Both types may also be classified according to the method of initiation into flash, stab and electric... 

Flash past. In assemblies such as delay detonators and military fuzes the possibility of an igniting flash by-passing a delay element. 

If the fuze has been set for "delay action" (usually 0.1 sec), the detonator is aligned with the delay expl components. Impact fires the delay primer. The flash from the primer sets off the BkPdr delay element which burns thru and sets off, respectively, the relay, the detonator, the booster lead-in, the booster and the main charge of the bomb. More detailed description of the AN-M103A1 fuze, especially of its arming mechanism is given in Ref 51a, pp 4-1 to 4-6... 

Delay-Relay Element. It is a component of HE train which introduces a delay in the time of functioning of the fuze. The delay element is always followed by a relay and the two are really one unit. The relay is an expl (such as BkPdr) designed to provide continuity of the expl train by picking up the weak flash from the delay element and augmenting it sufficiently to initiate, by detonation, a succeding component. The delay-relay element is located in the fuze of a projectile betw the percussion primer and the detonator (Ref 1)... 

The flash dets are used in fuze trains preceded by some nondetonating burning element, such as a percussion cap or pyrotechnic delay element. They are used mainly in mechanical out-of-line safe-and-arm fuze trains and serve the purpose of both explosive relay and detonator. 

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