Examples of Flash Type Fuze Detonators

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. 

The Detonator Mk37 Mod O is a compound detonator contg two increments of LA and one of Tetryl. It is used in auxiliary detonating Fuzes Mk44 46 and is initiated by the detonation of a LA detonator in the nose fuze. Detonator Mk37 initiates a Tetryl lead (Ref 23, pp 4-1 to 4-5) 

The compn of some foreign flash detonators used during WWII was, accdg to analyses made at PicArsn (Refs 8 12a), different from those used in USA. Following is a copy of Table 4-1 given in Ref 23, p 4-3 

Accdg to Ref 52, p 5-2, Tetryl is not the only explosive used as a base charge in US Army detonators, because PETN and RDX are also used in current flash-, stab- and electric-detonators 

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