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| HANDBOOK OF ENEMY AMMUNITION |
| PAMPHLET No. 14 |
| GERMAN ROCKTES, GUN AND MORTAR AMMUNITION |
| GERMAN CARTRIDGE Q.F. 7.5 cm Pak 40 HOLLOW CHARGE SHELL |
| (7,5 cm Gr.Patr. 38 Hl/B) |
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This round is of the fixed Q.F. type and is fired from the 7.5 cm anti-tank gun Model 40. The overall length of the complete round is 38 inches and it weighs approximately 17 lb. 6 oz. The shell body and cap is painted deep olive and stencilled in black, except the stencilling FES which is in white. |
| The complete round consists of the following components:– |
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Shell hollow charge filled cyclonite/wax (95/5). |
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Fuze A.Z. 38. |
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Gaine Zdlg. 40B. |
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Propellant charge of double base composition with igniter and flash reducer. |
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Case of steel coated with brass model 6340 St. |
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Primer percussion C/12 n.A. St. |
| Shell fuze and gaine |
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The filled shell and A.Z. 38 fuze are similar to that of the 7.5 cm L.G. 40 hollow charge shell (Granate 38 Hl/B), described in Pamphlet No. 8, pages 24 and 36, and illustrated in Figs. 10 and 15. The gaine is described in Pamphlet No. 13. The stencilling "FES" denotes that the driving band is of the sintered iron type containing (after the removal of the waxy material with which it was impregnated) carbon 0.06 per cent., silicon 0.02 per cent., manganese 0.21 per cent. |
| Propellant Charge |
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The propellant charge is of the Gudol type in the form of square flakes, weighing approxi-mately 14 oz. 13 dr. with a central tube of Digl. weighing approximately 2 oz. 2 dr. The mean size of the flakes is 0.156 inch x 0.156 inch x 0.22 inch, and the external and inter-nal diameter of the tube 0.55 inch and 0.47 inch respectively. The charge is contained in a knitted viscose rayon bag with an igniter sewn to the base. The bag is marked in red "Auch für Tropen" and in black 7,5 cm Pak 40 490 g. Gu.Bl.P. –AO– (4 x 4 x 0,6). |
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The igniter consists of 40 grams Nz.Man.NP (1,5 – 1,5) in the form of chopped cord. |
| The composition, as found by analysis, are as follows:– |
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Composition |
Propellant |
Central Stick |
Igniter |
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Nitrocellulose |
34.50 |
63.62 |
92.29 |
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Nitroguanidine |
30.27 |
–– |
–– |
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Diethylene-glycoldinitrate |
34.17 |
32.33 |
5.73 |
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Diphenylamine |
–– |
0.23 |
0.45 |
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Ethyl centralite |
–– |
–– |
–– |
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Sodium sulphate |
0.62 |
–– |
–– |
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Potassium sulphate |
–– |
3.52 |
0.33 |
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Graphite |
0.44 |
0.30 |
1.20 |
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Total |
100.00 |
100.00 |
100.00 |
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The flash reducer consists of 20 grams of potassium sulphate and is contained in a sepa-rate bag of knitted cellulosic material. The bag is stencilled 20 g. K2SO4. |
| Case |
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The case of steel, coated with brass, and is 28.1 inches in length. The base is stamped with the model number "6340 St. 7,5 cm Pak 40" and stencilled in white "FES". Details of the charge as marked on the cartridge bag are stencilled on the case. |
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Primer |
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The percussion primer C/12 n.A. is described in Pamphlet No. 4, page 10. The letters "St" added to the desgination indicate that the primer is of steel. |
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