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Target Stands by TuffsteelTM

smith & wesson semi-auto

Example: Magnitude of forces

The table below shows the magnitude of some forces - as multiples of the force of gravity FG - for the M80 bullet (7.62 x 51 NATO) at standard air density (r = 1.25 kg/m3).
M80 bullet
7.62 x 51 Nato
Mass [g]
9.45
Calibre [mm]
7.82
Force
Ma = 2.5
Ma = 0.6
Coriolis FC/FG
0.013
0.003
Centrifugal FZ/FG
0.003
0.003
Drag FD/FG
70.2
1.7
Lift FL/FG (d=1°)
9.4
0.4

In the table above, the relative magnitude of the lift force appears to be relatively large. This is due to the fact that an angle of yaw of 1° has been assumed. If a bullet flies stable and the transient yaw has been damped out, the maximum yaw however is much smaller than 1° and consequently the lift force is also much smaller.

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