Page 21 - Сигурност и отбрана - брой 2 - 2023

Security & Defense, Issue 2, 2023 Scientific journal

First group Second group

Figure 5. A graphical representation of the mean values of the deviation
from the dispersion axes for the two groups.

The area of the generated ovals is used for accurate comparison
between them. The area is calculated using the formula:

= (3)

where:
2
A – area of the ellipse in mm
a – horizontal axis of the ellipse in mm
b – vertical axis of the ellipse in mm

After substitution in Formula 3 the area of the ellipse showing the
average deviation when firing with a contactless suppressor (A1), is
calculated as shown:

= = 3,14 × 12,66 × 13,24 = 527,2
2
1

The area of the second oval (A2) representing the average deviation of
the perforations when firing without a suppressor has the following value:

2
= = 3,14 × 9,08 × 15,14 = 431,7
2

A comparison of the obtained values shows that the accuracy of
shooting with a contactless suppressor deteriorates, albeit by a minimal
margin.
The analysis of the results shows a deterioration of grouping when
firing with a contactless suppressor to an extent not exceeding the diameter

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