Abstract: The invention relates to a projectile (1, 1?) comprising a retaining element (2, 2?) and a penetrator (3). The penetrator (3) is at least partly received in a retaining element (2, 2?) receiving opening (12, 12?) which runs centrally relative to the projectile axis (A) and has a penetrator front (4) and a penetrator rear (5). The penetrator rear (5) has a cylindrical shape, and the penetrator front (4) runs in a conical manner from the penetrator rear (5) in the direction of a penetrator tip (6) with respect to the projectile axis (A). The length ratio of the length (LPF) of the penetrator front (4) to the length (LPH) of the penetrator rear (5) is approximately 1 to 1, preferably approximately 1 to 1.5, particularly preferably approximately 1 to 2.2.

Abstract: The invention relates to a projectile (1, 1?) comprising a retaining element (2, 2?) and a penetrator (3). The penetrator (3) is at least partly received in a retaining element (2, 2?) receiving opening (12, 12?) which runs centrally relative to the projectile axis (A) and has a penetrator front (4) and a penetrator rear (5). The penetrator rear (5) has a cylindrical shape, and the penetrator front (4) runs in a conical manner from the penetrator rear (5) in the direction of a penetrator tip (6) with respect to the projectile axis (A). The length ratio of the length (LPF) of the penetrator front (4) to the length (LPH) of the penetrator rear (5) is approximately 1 to 1, preferably approximately 1 to 1.5, particularly preferably approximately 1 to 2.2.

Abstract: A machine pushed trencher assembly includes a first plate that is triangularly shaped. A pair of second plates is coupled singly to and extends transversely from opposing sides of the first plate. The second plates are coupled to define a cutting edge. A fourth plate that is coupled to a base of the first plate is configured to couple to a front end of a machine. A second bar is coupled to the fourth plate and extends angularly above the second plates. A third bar is pivotally coupled to the second bar. An actuator is coupled to the second and third bars. At least one wheel is rotationally coupled to the third bar. The machine compels the cutting edge through a substrate to prepare a trench. The actuator positions the wheel so that it rolls on a surface of the substrate to control a depth of the trench.