Bomb Igniter, AN

Bomb Igniter, AN-M9, shown in Fig 5-13, consists of two concentric steel tubes joined at both ends to form an annular space which is filled with 1.6-lb of WP for land bombing or Na for water bombing. Outside diam is 1.25-inches, inside diam 0.88-in and overall length 38.34-in. The inner tube, which is ca 1.25-in shorter than the outer tube, contains a small coil spring for snubbing inserted bomb burster Ml3 (Ref 51a, p5-21)... 

Bomb Burster, AN-M13., designed for use (in conjunction with igniter AN-M9) in incendiary bomb AN-M47A4, consists of a plastic tube 0.45-inches in diam, 36.0-in long, provided at each end with a soft brass cup. It is filled with ca 65 g of TNT and has a Tetryl pellet at each end (Ref 51a, P 5-15)... 

A bomb igniter is an item designed for setting fire to the filler of incendiary and fire bombs... 

In its action the little bomb resembles that of a mortar and projectile. It consists of a cartridge very much like a shotgun shell which is functioned on impact by a strike point in the base of the body of the assembly. The flash from the cartridge ignites an incendiary charge of flaming thermite consisting of 11 pts of thermite and 6 pts of Ba(N03)2. 

But controlling a fusion reaction is a formidable job. Extraordinary conditions are required for igniting the reaction and for containing it. Decades of effort by scientists in a number of countries to tame the process have thus far been unsuccessful. The hydrogen bomb, far more powerful than the A-bomb, is an example of a successful thermonu-... 

The ignition of a fission bomb requires an ample supply of neutrons. In addition to the normal neutron source placed in the bomb, the high temperature attained during the chain reaction causes a small scale nuclear fusion between deuterium and tritium. 

Principle. An organic compound which contains chlorine is mixed with sodium peroxide and ignited in a closed metal bomb. The chlorine is thus converted to sodium chloride, and after acidification the chloride is estimated by the Volhard volumetric method. Bromine and iodine, when constituents of organic compounds similarly treated, are converted largely into sodium bromate and iodate respectively these ions are therefore subsequently reduced by hydrazine to bromide and iodide ions, and estimated as before. 

The heat peUet used for activation in these batteries is usually a mixture of a reactive metal such as iron or zirconium [7440-67-7] and an oxidant such as potassium perchlorate [7778-74-7]. An electrical or mechanical signal ignites a primer which then ignites the heat peUet which melts the electrolyte. Sufficient heat is given off by the high current to sustain the necessary temperature during the lifetime of the appHcation. Many millions of these batteries have been manufactured for military ordnance as they have been employed in rockets, bombs, missiles, etc. 

Metal Incendiaries. Metal incendiaries include those of magnesium in various forms, and powdered or granular aluminum mixed with powdered iron(III) oxide. Magnesium is a soft metal which, when raised to its ignition temperature, bums vigorously in air. It is used in either soHd or powdered form as an incendiary filling, and in alloyed form as the casing for small incendiary bombs. 

It is worth noticing that the "turbulent burning rates" reported in Figure 7.1.2 have been defined similarly but not exactly as the "turbulent flame speed" mentioned in Section 7.1.2. The mixture has been ignited at the center of the bomb and the dependence of the pressure on time has been recorded. This has enabled to determine the derivative of the burned mixture volume. This derivative is ascribed to a spherical surface whose volume is simply equal to the volume of fully burned products, thus leading to an estimate of the turbulent combustion rate. 

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