HE Projectile

MTTC. A Fr expl contg PA 55, TNT 35 and TN-m-cresol 10%, melting below 100°, used for cast loading of HE projectiles. DNPh can be substituted for TN-m-cresol (Ref 4)... 

Figure 19 The upper portion of the figure shows the effective charge of the He" projectile as a function of the ejected electron energy that is obtained from the experiment [68], Born theory [70], and the model of Toburen et al. [71]. The lower portion of the figure is the same data, but plotted in terms of the impact parameter. The impact parameter is obtained using the relationship between projectile velocity, energy loss, and impact parameter defined by the Massey criterion. (See the text and Ref 71 for details.)...

HE projectiles usually have a deep fuze cavity lined with an aluminum cup to help support the HE filler. By placing a supplementary burster charge in the deep cavity, HE projectiles may be adapted for use with standard time or impact fuzes. In... 

Typical HE Projectile with Supplementary Charge, shown in Fig 1-3, has been used in one of the "separated" rounds, the 120-mm HE, M73 w/Suppl Chge for Gun Cannons (Ref 52, p 2-75) and in several "separateloading" rounds, which are described below ... 

Fuze, TSQ M55 cmd Modifications. Fuzes M55A3, M55A2, M55A1 and M55 are used with HE projectiles primarily for high burst ranging, They are identical in every respect with Fuze M54 (See previous item), except the size. The booster M21 series is a manufacturing component of Fuzes M55 (Ref 52, pp 5-99 5-100 and Ref 20a, pp 294 297)... 

Fuze, PD M507- It is a dual-purpose (SQ and delay) type fuze designed for use on HE projectile M73 fired from the 120-mm AA cannon. It is described in Ref 52, p 5-30, but no drawing is given... 

Fuze, PD M572- It is an impact-type fuze similar to M557, except that is structurally reinforced by filling the ogive cavity with ca 2.5-oz of epoxy. The fuze is intended for use in 175-mm HE projectiles (Ref 52, p 5-47 no drawing)... 

Fuzes, Proximity, N1504A2, M504A1 (T75E7) and M504 (T75E6). Long contour fuzes for use with deep-cavity HE projectile M73 in AA cannons (pp 5-116 5-117)... 

Fuze, Proximity, M525 (T225)- It is designed to be used with 90-mm deep-cavity HE projectiles against airborne targets (pp 5-121 5-122)... 

Nose Percussion Fuze ("spoletta per-cussione"), of which M10 and M17 were used in most HE projectiles (pp 133-34)... 

Accdg to MUNIZIONAMENTO ITALIANO (Addnl Ref C), the terms proietto o proiettile are used referring to any heavy object which is fired from a gun and produces a destructive effect at a distance. This object may be solid (like an AP Bullet) or hollow (like HE Projectile) loaded with a bursting charge expl (carica di scoppio) which is detonated by an initiation train... 

Armor-Piercing High-Explosive (AP-HE) Projectile. Hakoiyudan Tekkodan... 

X-9. A pressed mixture of RDX AN (Ammonium Nitrate) used in Type 92 7-cm (70-mm) HE Projectile described in Ref 3, p 304, Fig 236 X-10. A pressed expl compn of RDX 90 paraffin 10%, coated with graphite and wrapped in A1 foil. It was used in Type 1 47-nun and 7-cm (75-mm) Armor-Piercing Projectiles described in Ref 3, pp 299 331... 

Lyddite. Br expl, similar in compn to the Fr Melinite (qv). The name was derived from the town of Lydd, near which the expl was manufd and tested. It contains either PA alone, or in admixture with about lOp of other aromatic hydrocarbons, added principally to lower the mp of the PA. Lyddite was adopted in 1888 for charging torpedo warheads, and later during the South African war, for HE projectiles Refs 1) Daniel (1902), 414 2) Colver... 

The test is supposed to duplicate the conditions which cake place when a HE projectile hits a hard surface... 

Trinitrotoluol or Trotyl (TNT). TNT was manufd during WWII by a two-stage process, first to mononitrotoluene and then to TNT. The crude product was called Rohtri, mp 76— 78° and the purified TNT was called Reintri, mp 80—81°. There were several methods used to purify TNT, such as by Na sulfite soln or by re-crystn from nitric acid, in the opinion of Dr A. Stettbacher, the best method (but more expensive) was to recryst it from hot acet contg 8% benz. This method was used at the Schweiz-erische Sprengstoff-Fabrifc AG, Dottikon, and in Holland, for the purification of TNT used as a bursting charge in HE projectiles... 

High Explosive Projectile (Shell) The HE projectile is one in which the percentage of filler to total weight is as high as possible, consistent with other requirements, such as good fragmentation or demolition. The projectile consists of... 

HE Projectile provided with booster system Detonatore AD Alto Esplosivo AP — Armor-Piercing (Perforanti) API — Armor-Pie rcing-Incendiary EP — Hollow Charge with Base Fuze EPS — Hollow Charge incorporating a nose fuze... 

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