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The effect of high spin on the performance of tracer compositions
Author(s) -
Briére Paul
Publication year - 1989
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.19890140607
Subject(s) - tracer , spin (aerodynamics) , combustion , projectile , rotational speed , chemistry , trace (psycholinguistics) , analytical chemistry (journal) , materials science , nuclear physics , physics , environmental chemistry , thermodynamics , classical mechanics , metallurgy , linguistics , philosophy
Abstract A unique tracer evaluation facility has been put into operation at the Defence Research Establishment, Valcartier (DREV), in order to characterize tracer compositions loaded in 5.56 mm envelopes. The effect of rotational speeds up to 300,000 rpm on the performances of two tracer compositions and the standard Belgian L‐110 tracer was studied in this facility. The trace duration decreased substantially with any increase in spin speed. The luminous output was observed generally to be weak at low rotational speeds and to increase with any rise in spin over 150 krpm. The formation of a convex surface of combustion in the composition under spin and the degree of obstruction of the projectile mouth by the combustion residues are postulated to explain such behaviours.