Bomb Delay Elements

Bomb dusters, incendiary 4 D962 Bomb complete round 2 B223 Bomb delay elements 4 D1014 Bomb drag plates and spoiler rings 4 D1021 Bomb drop tests 1 VIII... 

Demand for a delay powd capable of withstanding the effects of repeated impacts on a hard surface, typical of skip bombing, lead to the development of Ba chromate—Mn—S compositions. They proved satisfactory in the M16-A1 delay element, with burning times of 8—J1 secs obtained with compns contg Ba chromate 70-74, Mn 20—22 and S 3-4%. Storage at 65° resulted in increased burning time,... 

In Fig 1-48) is shown Delay Element, Obturated Column Type, Without Baffle. Its chge consists of 0.09g D-55 BkPdr loaded in 3 equal increments at 65000psi. Delay time 0.33 sec use - in Navy Bomb Fuzes MkXXI Mod 2 and MkXXII Mod 2... 

In Fig 1-51 is shown Delay Element, Obturated Column Type, Without Baffle, used in Army Bomb Fuze AN-M100A2... 

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... 

The expl components of each of the above fuzes consist of a delay element, a detonator, a booster lead, and a booster chge (1.9-oz of Tetryl). Its safety features consist of a safety (cotter) pin, which passes thru holes in the flange of the vane-cup and in the flange of the vane-cup support and locks the reduction mechanism to prevent the fuze from arming. The arming wire keeps the fuze unarmed until it is withdrawn when the bomb is released. These fuzes are "detonator-safe and "shear-safe"... 

When the primer is struck by the firing pin, it flashes and sets off the delay element. After burning thru, the delay element sets off the relay which fires the detonator and the bomb (Ref 51a, pp 4-36 to 4-38)... 

The firing pins cause the primers to ignite and the resulting flash sets off the delay elements, which are followed by relay elements, detonators, auxiliary booster lead-ins, booster leads, booster and main charge of the bomb (Ref 51a, pp 4-44 to 4-47)... 

Under this title are included bomb adapter-booster, auxiliary boosters, primer-detonator, delay elements, bursters and igniters... 

A bomb primer-detonator is an interchangeable unit (composed of a primer delay element and a detonator) which is designed to provide delay in the action of older models of tail fuzes. Primer-detonators of various time delays are available, with the exact delay time of each painted on the detonator head (Ref 51 a,... 

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) ... 

FIG F6 Percussion Pin for Bomb Fuze, M904, to initiate M9 Delay Element... 

March 1944). New fuze powd contains Ba chromate 74—77, manganese 20—22 sulfur 3—4% and is suitable for use in 8—11 second M16A1 Delay Element of bomb fuzes 151,3(March 1945). Improved 8—11 second delay powder contains Ba chromate 70.9, manganese 27.1 sulfur 2,0% with 2—3 parts ethyl cellulose added... 

Inert fuzes are provided for training ground crews in assembling handling of bombs, and also for classroom instruction of ordnance personnel. These fuzes are standard items, except that explosive components (primers, detonators, delay relay elements and boosters) are removed (Ref 51a, p 4-107)... 

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. 

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