M. R. Edwards, S. G. Myatt and S. Ellis
ABSTRACT: Fragments with masses of up to 100 g and velocities of up to 510 m/s can be produced from spiral-wound mild steel mortar tubes when firework maroon shells of diameters up to 150 mm are exploded in them. External ballistics calculations indicate that such fragments could travel up to 165±60 m, and possibly 30% further if ricochets on a concrete surface take place. Calculations indicate that these fragments possess sufficient kinetic energy density to penetrate the skin of spectators on landing. In addition, large slow–moving fragments of up to 7 kg are also produced and these could inflict blunt trauma injuries on operators.
Keywords: firework, mortar tube, safety, fragment, steel velocity, projection, injury, shell
Ref: JPyro, Issue 9, 1999, pp21-28
(J9_1)
© Journal of Pyrotechnics and CarnDu Ltd
