Fuze train

Zn 83 Si 9.6 parts loaded in a fuze train 0.054 inches long gave a mean delay time of 0.023 sec, while 2) KMnC>4 100, Zn 111 70/30-Tl/Ni alloy 11 parts gave a mean time of 0.062 sec] Ad 112a) R.M. Hillyer R.H.F. Stresau EBW (Exploding Bridge Wire) Initiation of RDX with Fifty Milli-joules , Paper No 5, Electric Initiator Sum-posium, Franklin Institute, Philadelphia,... 

German Fuze Train, known as ZUndersatz consisted practically of the same elements as American. Compositions of many of Get Fuze Trains were detd during WWII at PicArsn and the results taken from. PATR 1555(1945), pp 11-15 are listed in PATR 2510(1958) in Table 17 on p Ger 65... 

Wasley F.E. Walker, Critical Energy for Shock Initiation of Fuze Train Explosives , See Ref 33, paper No 18 36) A.P. Hardt et al, Early... 

Military fuze trains sometimes use flame-initiated detonators. In the military... 

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. 

More dramatic in terms of suspected causes of accidents have been chemical species arising from the incompatibilities of lead azide, environmental species, and the metal components in fuze trains. Copper azide is notorious in this respect however, it is but the most spectacular of potentially hazardous substances which have been sought or detected in the presence of azides in storage. 

The solutions are transferred to the reaction kettle through metered tubes, and the precipitated lead azide is washed and either filtered and dried or packed wet for shipment. In some countries the practice is to introduce the azide into detonators or explosive trains only at the place of manufacture in other countries, notably the U.S.A., transportation is permitted, and the packed azide may be stored and used in detonators or fuze trains at distant locations. However, while such peripheral practices and associated equipment are important, it is the control exercised during the metathesis in the kettle that affects the product and, more importantly, introduces subtle differences that make one form of lead azide different from another in performance characteristics, if not in gross physical appearance. Therefore, the emphasis of the present discussion will be on the reaction kettles and their associated equipment, and the following section will emphasize the control on the metathesis. 

Out-of-Line Safety. A term descriptive of a method by which detonator safety or bore safety is attained. In the safe condition, one or more components of the fuze or booster expl train are in a non-aligned condition with respect to the other components, so that normal functioning cannot occur Ref OrdTechTerm (1962), 216-R... 

Audrieth (Ref 3) patented the use of (SCN)X as a fuel in primers, ignition and fuze time trains (see Table below). A significant advantage of the invention for fuze time train useage over BlkPdr is the greater control evidenced in the rate of burning... 

Primers Igniters Fuze Time Train Mixtures ... 

Statistical Methods Appropriate for Evaluation of Fuze Explosive Train Safety and Reliability , NAVORD 2101 (1953), AD 066 428 3) A. 

Pistol (British). A mechanical device used since WWI, which is designed to initiate an explosive train by either freeing or functioning a striker but which contains no explosive itself. It is comparable in its mechanical function with US fuzes... 

Since in the anvil-type of primer the cup is not pierced, obturation (sealing) is obtd after the primer is fired, because the entire cup is pressed into cartridge cavity. Such primers are also known as obturated type, to distinguish them from the unobturated type, which is usually employed as an "explosive-train element" in fuzes. This type and some obturated types employed in fuzes are described in Ref 4, Part F... 

Practice Antitank Rifle Grenade M29 (T42) is used for training. It has no filler nor fuze. 

The definition of fuze detonator given in Ref 52, p 5-2 is "A detonator is used in the explosive train to create a detonating wave, then transmit it to the next component"... 

If a HE train is used in artillery fuzes it might be called artillery ammunition train... 

In order to understand clearer the function of elements in HE trains of fuzes, a description and sectional views of US Naval Base Fuze Mk21 are given. This information is derived from the comprehensive "Ordnance Explosive Train Designers Handbook",... 

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... 

Definition of a relay as given by Odierno of PicArsn (Ref 45d, p I) is An element of a fuze explosive train which augments an outside and otherwise inadequate output of a prior explosive component so as to reliably initiate succeeding train component. Relays, in general, contain a small single charge such... 

Definition of lead given in NOLR 1111 (Ref 23), p 6-1 is as follows A lead is that explosive component of the firing train of a fuze which is located between the detonator... 

A fuze is a complicated mechanical device, metallic or plastic, housing combustible and/or explosive components in a row known as "train". It is designed to initiate an item of ammunition on being subjected to one of the following actions stab, percussion, friction, mechanical time, chemical, electrical or hydrostatic pressure... 

Fuze, Auxiliary Detonating (ADF). An additional fuze used to augment the output of a fuze explosive train or to increase the overall safety features of an item of ammunition (Compare with "Activator described in Section 2, Part A of this work, Glossary of Ordnance and Other Terms Used in This Description of Ordnance Items")... 

Fuze Body. The part of a fuze which houses the majority of the functioning parts, and to which small parts are attached. It also houses elements of an "ignition train "or of an "explosive train "(See Section 4, Part C, Item b)... 

Fuze, Bomb, Inert. A bomb fuze without expl components used for training purposes... 

Fuze, Dummy. An imitation of a fuze having the same shape, weight and center of gravity as loaded fuze but contg no explosives or moving parts. Used in training... 

Fuze, Explosive Train. See Explosive Train in Section 3 of this work... 

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