F - Mech Eng,Light,Heat,Weapons – 42 – B
Patent
F - Mech Eng,Light,Heat,Weapons
42
B
102/5
F42B 10/54 (2006.01)
Patent
CA 1192443
ABSTRACT The invention relates to a training projectile stabilized by its own rotation and which comprises a conical nose section, a cylindrical intermediate portion and a tail section and which is provided with aerodynamic surfaces in the form of fins or grooves on the cylindrical intermediate portion. The fins or grooves are substantially radially directed and parallel to the symmetrical axis of the projectile. By the fins or grooves arrangement a braking effect is imparted to the projectile to reduce its rotational velocity after launching, so that the projectile at a specific, critical rotational speed becomes unstable and tips or tilts. This means a substantial increase of air resistance and a corresponding reduction of the projectile velocity forwards. By an appropriate adjustment of the fins or grooves it is possible to locate the instability just behind the target distance when training. The ballistic properties of the training projectile are maintained up to the target distance but the maximal firing range is reduced compared with normal live ammunition.
394708
Pettersson Kurt
Wik Torsten
Aktiebolaget Bofors
Fetherstonhaugh & Co.
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