Light and medium mortars are easy to move around. They are usually used by infantry units. Mortars can fire from a trench or defilade. FR230 is suitable for the following service penetrations: single and bunched cables, cable trays/ladders/baskets, non-combustible pipes. Also suitable for cable trunking, combustible pipes, insulated non-combustible pipes, in conjunction with a suitable Nullifire closer device (for example FP302 Intustrap or FS709 HP).

Mortars are not very stable if they are used on snow or soft ground. This is because the recoil pushes them into the ground. The Raschen Bag can be used to avoid this problem.

John Norris (2002). Infantry Mortars of World War II. Osprey Publishing. pp.42–43. ISBN 978-1-84176-414-6. Archived from the original on 2015-03-20 . Retrieved 2016-03-27.

A mortar is usually a simple, lightweight, man-portable, muzzle-loaded weapon, consisting of a smooth-bore (although some models use a rifled barrel) metal tube fixed to a base plate (to spread out the recoil) with a lightweight bipod mount and a sight. They launch explosive shells (technically called bombs) [1] in high-arching ballistic trajectories. Mortars are typically used as indirect fire weapons for close fire support with a variety of ammunition.

What Is Fire Cement Made Of?

Largest Mortar". Guinness World Records. Archived from the original on 2006-02-10 . Retrieved 2006-04-04.

Operators may fire spin-stabilised rounds from either a smoothbore or a rifled barrel. Rifled mortars are more accurate but slower to load. Since mortars are generally muzzle-loaded, mortar bombs for rifled barrels usually have a pre-engraved band, called an obturator, that engages with the rifling of the barrel. Exceptions to this were the U.S. M2 4.2-inch mortar and M30 mortar, whose ammunition had a sub-calibre expandable ring that enlarged when fired. This allows the projectile to slide down the barrel freely but grip the rifling when fired. The system resembles the Minié ball for muzzle-loading rifles. For extra range, propellant rings (augmentation charges) are attached to the bomb's fins. The rings are usually easy to remove, because they have a major influence on the speed and thus the range of the bomb. Some mortar rounds can be fired without any augmentation charges, e.g., the 81 mm L16 mortar. MALAKHIT" AUTOMATED ARTILLERY FIRE CONTROL SYSTEM". KBP Instrument Design Bureau. Archived from the original on 2 November 2019 . Retrieved 8 May 2020.FR230 may be used to seal apertures in the separating element up to 1100 mm x 1100 mm in a floor or wall (without additionnal reinforcement requirements). Mortars were very useful in the muddy trenches of the Western Front. A mortar round could be aimed to fall straight into a trench because of the deep angle that the bombs fell at. A modified version of the mortar, which fired a modern fin-stabilised streamlined projectile and had a booster charge for longer range, was developed after World War I; [13] this was in effect a new weapon. By World War II, it could fire as many as 30 bombs per minute and had a range of over 2,500 yards (2,300m) with some shell types. [14] The French developed an improved version of the Stokes mortar as the Brandt Mle 27, further refined as the Brandt Mle 31; this design was widely copied with and without license. [15] [16] [17] These weapons were the prototypes for all subsequent light mortar developments around the world. Our gypsum based fire resistant mortar creates a perfect seal around cables, pipes and ducts through walls, ceiling and floors. Just add water to the powder and it's simple to use, with no priming necessary and easy application for a smooth finish. Precision guided [ edit ] Soldiers standing in front of an M1064 mortar carrier, holding a XM395 Precision Guided Mortar Munition prototype at Fort Benning, Georgia, February 2006