Interior Ballistics a Text book for the Use of Student Officers At the Us Art
Interior Ballistics a Text book for the Use of Student Officers At the Us Art
James M James Monroe Ingalls
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7. 50 INTERIOR BALLISTICS. Solving' with reference to w and to v gives 27. 68 (/+/) and -*::. , . , ( S ) P These equations are useful in questions involving the bursting of shells, etc. Theoretical Determination of the Temperature of Explosion of Gunpowder. Having determined the value of /, the force of the powder, from the experiments, we can deduce the tempera- ture of explosion by means of the formula According to Noble and Abel' s experiments, if the gravimetric density of the powder is su...ch that a kilogramme occupies one litre, the gases furnished by its combustion will fill a volume of 280 litres at oC. Under the normal atmospheric pressure of 103. 33 kgs. Per square decimetre. We therefore have 280 and whence 273X291 200 = 103. 33X280 This is the absolute temperature of combustion of gunpowder according to Noble and AbeT s latest deductions from their experi- ments. Subtracting 273 from this temperature we have tem- perature of explosion = 2475C. (4487F. ). With regard to the theoretical temperature of explosion the authors remark as follows: "We have made several experiments with the view of obtaining the temperature of explosion, by ascertaining the effects of the heat developed on platinum.
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