| 摘要 |
<p>With the object of facilitating the terminal guidance of the projectile or increasing the effect of an explosive charge with a hollow-charge effect carried by the projectile, the projectile is provided with stabilizing fins (6-9) which are extended at a desired point in the trajectory of the projectile and brake the rotation of the projectile. The projectile is so dimensioned that its centre of pressure (C2) is situated behind the centre of gravity (G) of the projectile in the extended position of the fins (Figure 2) and so that the centre of pressure (C1) lies in front of the centre of gravity of the projectile in the retracted position of the fins (Figure 1), so that, with braked rotation, the projectile changes over from being spin-stabilized to being fin-stabilized. The fins (6-9), which can consist of so-called wraparound fins, are held in the retracted position, in an embodiment shown, by means of covering plates (2-5) which are held in place by a so-called base bleed unit (1). A delay device is adapted to be separated from the projectile at said desired point in the trajectory, so that the covering plates (2-5) are removed and expose the fins (6-9), as a result of which these can be extended. </p> |
