Germany (like England), had it's own version of “The Apple Mortar”. The “Trajectory Mortar” was designed to “throw” it's low-explosive round – over the Trench Perimeter top. Working very much the same way a Medieval Catapult would work, compressed spring torsion would be created (via hand cranked wheels). The projectiles (ranging up to 20-pounds), would then be “released” by a catch latch. The Trajectory Mortar could hurl it's shell up and over to an impressive 40 feet (with a timed explosive shell capable of up to 5 yards of damage).