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Determination of Moments of Inertia and Rotational Unbalance of a Projectile and the resulting forces on and deflections of the muzzle
Author(s) -
Leisinger K. F.
Publication year - 1977
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.19770020605
Subject(s) - projectile , moment of inertia , muzzle , rotation (mathematics) , principal axis theorem , mechanics , inertia , physics , muzzle velocity , classical mechanics , angular velocity , euler's equations , range of a projectile , rotary inertia , barrel (horology) , engineering , mathematics , geometry , mechanical engineering , quantum mechanics
Asymmetries in the mass distribution of a projectile lead to rotational unbalance. A technique for determining this unbalance will be described. One must distinguish between static unbalance, where the centre of gravity does not lie on the axis of rotation, and dynamic unbalance, where the axis of rotation deviates from that of one of the principal moments of inertia. On firing, due to the spin of the projectile, both kinds of unbalance lead to a bending of the barrel. This is calculated using a simple theoretical model and measured values of moments of inertia and unbalance.