Abstract :
In research on mortar bombs, it will be examined what possibilities will be
made Mortar bombs when dropped experience rotation caused by the influence of
the force principle torque which will be affected by several variables such as wind
coming perpendicularly hit a mortar bomb which can be assumed to be a force
perpendicular to arm or the direction of the mortar bomb when it fell, then there is
the force arm which is directly related with the applied force and assumed to be the
distance between the parts affected by the force with hinge parts or those that are
not subject to force, and there will be corners or angles that will affect the position
of the mortar bomb dropped.
The experiment was carried out by means of a simulation using software,
which will it is simulated that the mortar design added tail stabilizer modification
is expected when dropped vertically the first part that will fall to the surface is the
tip / tip has a detonator and triggers a warhead. The results obtained that the
mortar bomb with fin modification with a length of 7.5 cm and a width of 2 cm with
a thickness of 1 mm is tail stabilizer with the best shape because from the analysis
using ansys it is obtained the calculated force and moment results are close to 0.
The conclusions that can be drawn from the modified research on the MU 27
mortar bomb are as follows. Of all the modifications to the mortar bomb that has
been made, namely the bomb mortar with square shape, mortar bomb with circle
shape and mortar bomb with the circle design have more acuration with assumption
that moment on X axis and Y axis and the value close to 0. Because of that mortar
bomb have more acuration.