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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.

For historical buildings, it is preferable to use a natural hydraulic mortar mix comprising materials such as sharp sand that When fully mixed and a uniform colour, hollow the centre once again and tip in some water. Start with a small amount and mix by folding from the outside in, adding water in small amounts and mixing as you go

construction jobs such as for stone and cills and chimney work. Lime-based mortar with sharp sand should be used for chimney work GMM 120–120 mm Guided Mortar Munition". Israel Military Industries. Archived from the original on 7 April 2014 . Retrieved 6 April 2014.

The largest mortars ever developed were the Belgian " Monster Mortar" (24 inches; 610mm; developed by Henri-Joseph Paixhans in 1832), Mallet's Mortar (36inches; 914.4mm; developed by Robert Mallet in 1857), and the " Little David" (36inches; 914.4mm; developed in the United States for use in World War II). Although the latter two had a calibre of 36 inches, only the "Monster Mortar" was used in combat (at the Battle of Antwerp in 1832). [34] The World War II German Karl-Gerät was a 60cm (23.6 inch) mortar and the largest to see combat in modern warfare.Plasticiser is a liquid used to reduce the water content in mortars while improving the workability and adhesion of the mixture.

Folk RL, Valastro S (1979). Dating of lime mortar by 14C (Berger R, Suess H.ed.). Proceedings of the Ninth International Conference: Berkeley: University of California Press. pp.721–730. As a general rule, however, Portland cement should not be used for the repair or repointing of older buildings built in lime mortar, which require the flexibility, softness and breathability of lime if they are to function correctly. [13] [14]To put this into starker context: the standard 120-mm mortar only lands within 100m of the target 50% of the time and there was a 38% likelihood of a firing landing between 160m and 480m away from the target. a mortar mix for paving with a ratio of 1:3 as this would make for a strong mortar mix. In most cases you will need water, soft MOTAR is currently supporting airmen from across the USAF Major Commands (MAJCOMS). So, if you’re an airman, and you want your own MOTAR account, reach out here: [email protected] or simply visit https://www.motar.io and use your CAC to login (see: https://docs.motar.io/register-for-a-motar-account)!

In this section, we will discuss lime mortar and answer questions such as what materials are needed to achieve the best Unsure how to make lime mortar for pointing? You’ll need to mix together sand and lime to create an even mixture before using. For great results, you may want to consider hiring a screed mixer. Slough observer:Suspected Second World War mortar exploded in Windsor today, 3 October 2014. Example of use of the word "mortar" for a mortar bomb Visit us at Trade Shows like ForceCon 2022, LOA (LOA 2022 featured an entire MOTAR Zone!) and I/ITSEC! The Strix mortar round is a Swedish endphase-guided projectile fired from a 120mm mortar currently manufactured by Saab Bofors Dynamics. STRIX is fired like a conventional mortar round. The round contains an infrared imaging sensor that it uses to guide itself onto any tank or armoured fighting vehicle in the vicinity where it lands. The seeker is designed to ignore targets that are already burning. Launched from any 120mm mortar, STRIX has a normal range of up to 4.5km. The addition of a special sustainer motor increases the range to 7.5km.A: Portland cement mortar or simply cement mortar is a modern mortar mix which was patented in 1824. Sources